Background Statement for SEMI Draft Document 4724A New Standard: MEASUREMENT METHOD OF LED LIGHT BAR FOR LIQUID CRYSTAL DISPLAYS

Transcription

1 Bacground Statement for SEMI Draft Document 474A New Standard: MEASUREMENT METHOD OF LED LIGHT BAR FOR LIQUID CRYSTAL DISPLAYS Note: Ths bacground statement s not part of the balloted tem. It s provded solely to assst the recpent n reachng an nformed decson based on the ratonale of the actvty that preceded the creaton of ths document. Note: Recpents of ths document are nvted to submt, wth ther comments, notfcaton of any relevant patented technology or copyrghted tems of whch they are aware and to provde supportng documentaton. In ths contet, patented technology s defned as technology for whch a patent has ssued or has been appled for. In the latter case, only publcly avalable nformaton on the contents of the patent applcaton s to be provded. Bacground Statement: Wth ncreasng use of LED lght bar as a lght source for lqud crystal dsplays, there are requests for electrooptcal and mechancal performances to be evaluated. However, they have not been standardzed so far. Ths proposed standard s developed to solve ths problem and to provde relevant test methods of LED lght bar for LCD baclght unts. The results of ths ballot wll be dscussed at the net Tawan LED Baclght TF meetng scheduled on September 3, 010. If you have any questons, please contact to the LED Baclght Tas Force co-leaders: L-Fen Ten, Carol_Ten@tr.org.tw Chun-Hsang Wen, CHWen@tr.org.tw Gaga Kuo, Gaga@auo.com

2 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/010 SEMI Draft Document 474A NEW STANDARD: MEASUREMENT METHOD OF LED LIGHT BAR FOR LIQUID CRYSTAL DISPLAYS 1 Purpose 1.1 Ths measurement standard defnes measurement methods for varous characterstcs of lght emttng dode (LED lght bar for lqud crystal dsplays (LCDs. Ths standard wll be helpful to unfy methodologes used for measurement of LED lght bar qualty, whch can mprove LED baclght unt standard reproducton characterstcs or fdelty to orgnal desgn rule. Scope.1 Ths standard s a generc specfcaton for electro-optcal and mechancal measurement methods of LED lght bar for Lqud Crystal Dsplays (LCDs.. Ths standard s only for common types of LED lght bar of the edge (or sde type baclght unt and general purpose for methodology. The types of LED on the LED lght bar cover both sde-vew and top-vew surface mount devce (SMD LEDs..3 The standard ncludes practcal methodologes of flu, ntensty, color, and geometrc specfcaton measurements. These optcal performances apply to practcal operatonal condtons such as an etended source, rather than a mult-pont-source. NOTICE: Ths standard does not purport to address safety ssues, f any, assocated wth ts use. It s the responsblty of the users of ths standard to establsh approprate safety and health practces and determne the applcablty of regulatory or other lmtatons pror to use. 3 Referenced Standards and Documents 3.1 SEMI Standard SEMI D36 Termnology for LCD Baclght Unt 3. CIE Standard 1 CIE 15:004 3rd edton Colormetry CIE 17:007 nd edton Measurement of LEDs CIE 84:1989 The Measurement of Lumnous Flu NOTICE: Unless otherwse ndcated, all documents cted shall be the latest publshed versons. 4 Termnology 4.1 Abbrevatons and Acronyms LED lght emttng dode 4.1. LGP lght gude plate PCB prnted crcut board SMD surface mount devce CRM certfed reference materal 4. Optcal/Mechancal Defntons 4..1 edge (or sde type LED baclght unt a baclght unt wth one or more LED lght bars coupled wth one or more edges of the LGP of baclght unt. Lght emts orgnally from the edge (rather than from bottom to top of LGP (shown n Fgure LED lght bar a strp lght source wth multple LEDs (SMD or other pacage type LED mounted along on a strp PCB. In general, all the LEDs emt the chef optcal radaton n the same drecton top-vew SMD LED a SMD LED whose (optcal radaton emttng surface s parallel to the PCB surface (shown n Fgure. 1 Internatonal Commsson On Illuson, Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 1 Doc. 474A SEMI

3 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/ sde-vew SMD LED a SMD LED whose (optcal radaton emttng surface s normal to the PCB surface (shown n Fgure 3. ŷ ẑ Fgure 1 Structure of the Edge Type LED Baclght Unt Showng the Coordnate System for the Left Edge LED Lght Bar, and the Lght Bar May be Populated wth ether Top-vew or Sde-vew SMD LEDs PCB ˆ y o, Lght Optcal Flms / Dffuser Reflector LGP LED Lght Bar PCB front Surface Lght Gude Optcal Radaton Emttng Surface z ˆo, Fgure Cross Secton of Top-vew SMD LED Couplng wth a Lght Gude Plate ˆ y o, ˆ z o, ˆ o, PCB front Surface Optcal Radaton Emttng Surface Fgure 3 Cross Secton of Sde-vew SMD LED, Optcal Radaton As s Z-as 4..5 algnment mar an aulary mar used to ndcate the LED specfc mountng poston on the PCB (shown n Fgure specfc orgn a center coordnate (-y plane for the offcal desgned mountng poston of LED on the PCB. The specfc orgn of th LED s denoted as O (, y. The specfc orgns of all LED can refer to ther algnment mars on the PCB. NOTE 1: For testers that ntend to get the absolute coordnate, n general the global coordnate orgn (0,0 s recommended to be the center of the left-most algnment mar. ˆ 4..7 maor as an as maor wth drecton defned by PCB algnment from left to rght or through each algnment mar centers of all LEDs (shown n Fgure Measurement Defntons Mechancal Characterstc Measurement Parameter Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page Doc. 474A SEMI

4 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/ mechancal orgn a center coordnate (-y plane of the emttng surface feature of a LED used as the reference for the mountng poston of a LED on the PCB. The mechancal orgn coordnate for th LED s denoted as O m, ( m,, y m, (shown n Fgure 4 ( s the ordnal number of LED optcal orgn a center-of-gravty coordnate (-y plane of the optcal radaton on the emttng surface of a LED used as the reference for the mountng poston of a LED on the PCB. The optcal orgn coordnate for th LED s denoted as O o, ( o,, y o, (shown n Fgure mechancal orgn devaton an -y plane dstance between each mechancal orgn and the relatve LED specfc orgn. It s used as the reference for mountng as of a LED. The mechancal orgn devaton for th LED s denoted as d m, ( m,i, y m,. PCB zˆm,1 z ˆm, 3 ˆm, y ˆm, ẑ ŷ ˆm,1 ˆm, 3 ˆm, LED #1/#/#3 Mechancal Orgns O m,1,o m,,o m,3 z Algnment Mar ˆmaor O m, ˆm, ˆmaor th LED Fgure 4 Dagram of Maor As of LED Lght Bar (Image of Unlghted LED Lght Bar, Mechancal As, Mechancal Orgns, Algnment Mars Maor as Fgure 5 Dagram of Lumnance Spatal Dstrbuton (Image of Lghted LED Lght Bar, Global Coordnate Orgn (Blac Dot, Optcal Orgns (Red Dot, and Optcal As of th LED NOTE: The Lower Dagram s an Eaggerated Drawng for Demonstratng the Devaton of Optcal Orgn and Optcal As from Specfc Orgn (Blac Cross Mar, and Maor As. Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 3 Doc. 474A SEMI

5 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/ optcal orgn devaton an -y plane dstance between each optcal orgn and the relatve LED specfc orgn. It s used as the reference of the accuracy of LED radaton dstrbuton. The optcal orgn devaton for th LED s denoted as d o, ( o,,y o, optcal - as an as through optcal orgn wth mamum lght spread, drecton followed PCB maor as from left to rght. It s used as the reference of the LED radaton dstrbuton. The optcal -as for th LED s denoted as ˆ (shown n Fgure 5. o, optcal -as devaton the angle between each optcal -as and the maor as of LED lght bar. It s used as the reference for the accuracy of LED radaton dstrbuton. It s denoted as Δ θ ( ˆ o, ˆ, maor or Δ θ o, for th LED mechancal -as an as along the longer LED edge, drecton followng the PCB maor as from left to rght. It s denoted as ˆ for th LED. m, mechancal -as devaton the angle between each mechancal -as and the maor as of LED lght bar. It s denoted as Δ θ ( ˆ m, ˆ, maor or Δθ m, for th LED Optcal Characterstc Measurement Parameter partal lumnous flu the amount of lumnous flu under a certan sold angle of each LED n a forward drecton over the specfc orgn total lumnous flu the total lumnous flu n 4π sold angle of a LED lght bar forward π lumnous flu the amount of lumnous flu n π sold angle of each LED n forwards drecton over the specfc orgn partal/forward π lumnous flu unformty the mnmum and mamum rato of partal/forward π lumnous flu among LEDs of the LED lght bar lumnous ntensty the partal flu dvded by the relatve sold angle, or the llumnance dvde by the square of the measurement dstance (under certan llumnaton area wth certan measurement dstance for each sngle SMD LED of LED lght bar over ts specfc or mechancal orgn poston. The measurement report shall llustrate the measurement condton lumnous ntensty unformty the mnmum and mamum rato of average ntensty among LEDs of the LED lght bar (measurement report shall llustrate the measurement condton color the chromatcty coordnate of sngle LED or LED lght bar under the measurement condton of partal, total, or π lumnance flu, or average ntensty. The measurement report shall llustrate the measurement condton color non-unformty the mamum color dfference, (.e., the mamum Eucldean dstanceδu v orδy n CIE 1976 (u,v or CIE 1931 (,y color space respectvely between any two LEDs of the lght bar. The measurement report shall llustrate the measurement condton. 5 Set-up 5.1 All tests and measurements shall be carred out n rooms wth llumnance under 10 lu. All tests and measurements shall be carred out n ambent temperature (5 ± 3 C, relatve humdty (60 ± 0 RH. 5. LEDs shall be drven from constant current swtchng regulators. The varaton of drvng current should be wthn ±0.5% for durng of measurement perod. As an alternatve, testers should mae sure that the drvng current varaton does not cause more measurement uncertanty than what s requred. 5.3 Warm-up Tme Warm-up tme s the perod from power-on to reach lght ntensty or ts color to stablty (or some other optcal parameters wth whch testers may be concerned Specfy the typcal warm-up curve (e.g., relatve ntensty and chromatcty vs. lght-on perod shown n Fgure 6 for each type LED lght bar Specfy the warm-up tme for each type of optcal characterstcs measurement Specfy the varaton of ntensty or color (or some optcal parameters wth whch testers may be concerned for durng of measurement perod. (In the case of Fgure 6, the warm-up tme s set to be 180 seconds (3 mnutes Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 4 Doc. 474A SEMI

6 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/010 for the ntensty/ntensty unformty measurement, wth ntensty varaton less than 0.3% durng the measurement perod of mnutes. Fgure 6 The Typcal Warm-up Curve of Relatve Average Intensty vs. Lght-on Tme of SMD LED for LED Lght Bar 5.4 The optcal as of the optcal measurement devce should be perpendcular to the LED lght bar under test. The uncertanty n as algnment s specfed to be ±0.3 as a goal. As an alternatve, testers should mae sure that the algnment error does not cause more measurement uncertanty than what s requred. 5.5 The uncertanty n locatng measurement poston of the optcal measurement devce should relatvely wthn ±3% of the sngle LED dagonal. As an alternatve, testers should mae sure that the locaton error does not cause more measurement uncertanty than what s requred. 6 Measurement Method 6.1 Mechancal Characterstc Measurement Method Mechancal Orgn Measure the feature (n general, rectangular of the emttng surface for each LED n - y plane. Then determne the geometrc center coordnates relatve to the LED feature. The mechancal orgn coordnates O m, ( m,, y m, for th LED are defned as those coordnates Optcal Orgn Measure the lumnance spatal dstrbuton L(,y n -y plane whle the LED lght s on. Then calculate the gravty center coordnates of each LED accordng to the lumnance spatal dstrbuton tself. The optcal orgn coordnates O o, ( o,, y o, for th LED are defned as those coordnates. They are calculated by the Equaton 1, and L (, y s the lumnance spatal dstrbuton of th LED (see Append 1 for Measurement eample. o, L (, y d, L (, y d y o, y L (, y dy. (1 L (, y dy To acheve the measurement, a dgtal mage-type nstrument or a photometer may be used, the lumnance spatal dstrbuton of th LED s denoted as L,.(,y. Then the Equaton 1 appromates to the Equaton : L,, o,, L, yo y, L L,,, ( For =1..m, m s the total samplng number of area of nterested. The area of nterested s the area whch lumnance s greater than some rato of mamum lumnance for each LED. NOTE : For testers that ntend to avod cross tal wth nearby LEDs or ncludng too much bacground nose, n general the rato of mamum lumnance s recommended to be 1/ Mechancal Orgn Devaton Calculate the dstance between each mechancal orgn O m, ( m,, y m, and the relatve LED specfc orgn O (, y. (The specfc orgn O (, y of th LED s offcal data, or the specfc dstance from the center coordnate of the relatve algnment mar. It can be measured by mechancal or optcal type nstruments. The mechancal orgn devatons d m,i (,y of th LED s defned as that dstance. It s calculated by Equaton 3: Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 5 Doc. 474A SEMI

7 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/010 d m, (, y ( m, + ( ym, y =. ( Optcal Orgn Devaton Calculate the dstance between each optcal orgn O o, ( o,, y o, and the relatve LED specfc orgn O (, y. The optcal orgn devatons d o,i (,y of th LED s calculated by Equaton 4. d o, (, y ( o, + ( yo, y =. ( Optcal X-as Measure the lumnance spatal dstrbuton L(,y n -y plane whle the LED lght s on. Fnd the optcal orgn O o, ( o,, y o, of th LED nsde the some rato of mamum lumnance area. Then fnd the longest lne segment passng through the optcal orgn wthn ths area. The optcal as for th LED s along ths lne segment, and ts drecton follows the PCB maor as from left to rght. Ths as s assgned as the optcal -as of th LED. It s denoted by ˆ o, NOTE 3: For testers who ntend to avod cross tal wth nearby LEDs or ncludng too much bacground nose, n general the rato of mamum lumnance s recommended to be 1/10. (see Append 1 for measurement eample Optcal X-as Devaton Calculate the angle between the optcal -as ˆ o, of th LED and the maor as ˆ maor of LED lght bar. Ths angle s the optcal -as devaton Δθ o, of th LED. ( Δθ o, Mechancal X-as Measure the feature (n general, rectangular shape of the emttng surface for each LED on the PCB n the -y plane. Determne the longer edge of ths contour of the th LED. Ths longer edge s assgned as the mechancal -as for th LED. It s denoted by ˆ. m, Mechancal X-as Devaton Calculate the angle between the mechancal -as ˆ m, of th LED and the maor as ˆ maor of LED lght bar. Ths angle s the mechancal -as devaton Δ θ m, of th LED. ( Δθ m, Optcal Characterstc Measurement Method 6..1 Partal Lumnous Flu Measure the total amount lumnous flu under the certan sold angle for each LED. The measurement setup condtons are shown n Fgure 7. An ntegrated sphere s over ts specfc or mechancal orgn (coordnate of each LED. The dstance between the LED front surface and the open port of the ntegrated sphere s d. The dameter of the open port s D. In order to avod the measurement varaton caused by heat, the measurement s conducted by swtchng on ether an ndvdual LED or the smallest sngle drvng unt n the lght bar. If the ndvdual LED cannot be drven, some baffles shall be used to avod stray lght from adacent LEDs. Each partal lumnous flu s determned by a photometer. The photometer can be a cosne-corrected photometer or a spectral radometer. If a cosne-corrected photometer s used, t shall be calbrated by spectral msmatch correcton. The measurement system shall be calbrated wth a partal lumnous flu LED CRM (Certfcate Reference Materal regardless of the nd of photometer used. The partal lumnous flu of th LED denotes asφp,. d Cosne-corrected Photometer Head or Spectral Radometer PCB Front Surface Fgure 7 Setup Condton for Partal Lumnous Flu Measurement 6.. Total Lumnous Flu Measure the total lumnance flu of 4πsold angle of a lght bar. The measurement s conducted by swtchng on a whole LED lght bar. One of the possble measurement setup condtons s shown n D Baffle Integrated Sphere Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 6 Doc. 474A SEMI

8 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/010 Fgure 8. The LED lght bar s located at the center of the ntegrated sphere. It s recommended that the sphere dameter should be twce the length of the LED lght bar at least, and the reflectance of the sphere wall and the baffle should be hgher than 90%. The baffle s placed at a dstance equal to about 1/6 of the sphere dameter (or 1/4, f the LED lght bar s short compared to the sphere dameter away from the detector. It should be bg enough to avod the lght source drectly llumnatng detector whle beng as small as possble. The total lumnous flu s determned by a photometer. The photometer can be a cosne-corrected photometer or a spectral radometer. If a cosne-corrected photometer s used, t shall be calbrated by spectral msmatch correcton. The measurement system shall be calbrated wth a total lumnous flu LED CRM regardless of the nd of setup condton or photometer used. The total lumnous flu of a LED lght bar s denoted byφt. Shadowed Area ẑ Integrated Sphere ˆmaor LED Lght Bar Baffle Cosne-corrected Photometer Head or Spectral Radometer Fgure 8 Setup Condton for Total Lumnous Flu Measurement 6..3 Forward π Lumnous Flu Measure the amount of lumnous flu under the forward π sold angle of each LED. The measurement setup condtons are shown n Fgure 9. An ntegrated sphere s attached to the PCB front surface over ts specfc or mechancal orgn (coordnate of each LED. The dameter of the open port s ust suted to the LED sze. In order to avod the measurement varaton caused by heat, the measurement s conducted by swtchng on ether an ndvdual LED or the smallest sngle drvng unt n the lght bar. Each π lumnous flu s determned by a photometer. The photometer can be a cosne-corrected photometer or a spectral radometer. If a cosne-corrected photometer s used, t shall be calbrated by spectral msmatch correcton. The measurement system shall be calbrated wth a π lumnous flu LED CRM regardless of the nd of photometer used. The forward π lumnous flu of th LED s denoted byφh,. Cosne-corrected Photometer Head or Spectral Radometer Baffle PCB Front Surface Integrated Sphere Fgure 9 Setup Condton for Forward πpartal Lumnous Flu Measurement 6..4 Lumnous Flu Unformty Determne the mamum and mnmum of the partal (or π lumnous flu for all LEDs on the LED lght bar. The lumnous flu unformty U p ( or U h for forward πlumnous flu s defned by Equaton 5 (or Equaton 6. Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 7 Doc. 474A SEMI

9 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/010 Mn( Φ p, U p =, for =1..n, n s the number of LED on LED lght bar, (5 Ma( Φ p, or Mn( Φh, U h =,for =1..n, n s the number of LED on LED lght bar. (6 Ma( Φh, 6..5 Lumnous Intensty Measure the partal lumnous flu for each LED wth a certan sold angle of each LED. The lumnous ntensty s defned as the rato of partal lumnous flu to the relatve sold angle. Or measure the average llumnance wthn a certan llumnaton area wth a certan measurement dstance for each sngle LED over ts specfc or mechancal orgn poston. The lumnous ntensty also can be defned as the average llumnance dvded by the square of the measurement dstance. The lumnous ntensty of th LED denotes as I v, (measurement report shall llustrate the measurement condton. In order to avod the measurement varaton caused by heat, the measurement s conducted by swtchng on ether an ndvdual LED or the smallest sngle drvng unt n the lght bar. If the ndvdual LED cannot be drven, some baffles shall be used to avod stray lght from adacent LEDs Lumnous Intensty Unformty Determne the mamum and mnmum of the lumnous ntensty for all LEDs on the LED lght bar. The lumnous ntensty unformty U v s defned by Equaton 7. Mn( Iv, U v =,for =1..n, n s the number of LED on LED lght bar. (7 Ma( Iv, 6..7 Color Measure the chromatcty coordnate for each LED. In order to avod the measurement varaton caused by heat, the measurement s conducted by swtchng on ether an ndvdual LED or the smallest sngle drvng unt n the lght bar. The measurement setup condton s the same as partal lumnous flu, π lumnous flu, or lumnous ntensty condtons. If the ndvdual LED cannot be drven, some baffles shall be used to avod stray lght from adacent LEDs. Or measure the chromatcty coordnate for the whole LED lght bar under the measurement setup condton of total flu. The chromatcty coordnate s determned by a photometer. The photometer can be a colormeter or a spectral radometer. A colormeter shows the measurement result of chromatcty coordnate n CIE 1931 (,y or CIE 1976 (u,v color space. A spectral radometer shows the result of spectral power dstrbuton whch can be calculated nto the chromatcty coordnates. If a colormeter s used, t shall be calbrated by spectral msmatch correcton. The measurement system shall be calbrated wth a color LED CRM for usng any nd of photometer. (The measurement report shall be noted wth measurement setup condton whch s used Color Non-unformty Determne the mamum of the color dfference between any two LEDs on the lght bar. The color non-unformty s defned by Equaton 8 (or Equaton 9. or ' ' ' ' Δ u' v' = Ma( ( u u + ( v v, (8 Δ y = Ma( ( + ( y y. (9 For and =1..n, n s the number of LED on LED lght bar. (The measurement report shall nclude the measurement setup condtons used. NOTE 4: It s recommended the Δu v beng the prorty. 7 Report 7.1 Report the followng general nformaton: Date, tme of test, 7.1. Identfcaton of operator, LED lght bar nformaton (dentfcaton of model number, seral number, LED type, global coordnate orgn locaton, LED lght bar sze, LED number, LED sze, left-most LED center locaton, left-most algnment mar center locaton, LED ptch, etc., Set-up condton (Identfcaton of ambent temperature, humdty, drvng current, etc.. Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 8 Doc. 474A SEMI

10 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/ Report the followng mechancal characterstc measurement results and the analyss nformaton: 7..1 Mechancal orgns, mechancal orgn devatons (ncludng specfc orgns for each LED, 7.. Mechancal -as angles, mechancal -as devaton (dentfcaton of maor as angle for each LED, 7..3 Rato of mamum lumnance to determne the area of nterested for calculatng optcal orgns and optcal as, 7..4 Optcal orgns, optcal orgn devaton (ncludng specfc orgns for each LED, 7..5 Optcal -as angles, optcal -as devaton (dentfcaton of maor as angle for each LED. 7.3 Report the followng optcal characterstc measurement results and the measurement condtons: Partal lumnous flu Partal lumnous flu, chromatcty coordnates (under partal lumnous flu measurement condton for each LED, Partal lumnous flu unformty, color non-unformty for ths LED lght bar, Specfcaton of measurement condtons, ncludng measurement locaton, lght measurement equpment, worng dstance, dameter of open port of ntegrated sphercal sphere, sold angle, warm-up tme, varaton of partal lumnous flu for durng of measurement perod Forward πlumnous flu Forward π lumnous flu, chromatcty coordnates (under forward π lumnous flu measurement condton for each LED, Forward πlumnous flu unformty, color non-unformty for ths LED lght bar, Specfcaton of measurement condtons, ncludng measurement locaton, lght measurement equpment, warm-up tme, varaton of forward πlumnous flu for durng of measurement perod Lumnous ntensty Lumnous ntensty, chromatcty coordnates (under lumnous ntensty measurement condton for each LED, Lumnous ntensty unformty, color non-unformty for ths LED lght bar, Specfcaton of measurement condtons, ncludng measurement locaton, lght measurement equpment, worng dstance, sold angle, warm-up tme, varaton of lumnous ntensty for durng of measurement perod Total flu Total flu, chromatcty coordnates (under total flu measurement condton for the whole LED lght bar, Specfcaton of measurement condtons, ncludng lght measurement equpment, ntegrated sphere dameter, CRM descrpton, warm-up tme, varaton of total flu for durng of measurement perod. 7.4 Report tables General Informaton s provded n Table1. Table 1 Report Sample of General Informaton General Informaton Date of Test Tme of Test Operator LED Lght Bar Informaton Set-up Condton Model Number Seral Number LED Type Global Coordnate Orgn (0,0 Locaton LED Number (pc (mm y(mm PtchΔ(mm LED Lght Bar Sze --- LED Sze --- LED Specfc Locaton Algnment Mar Locaton Ambent Temperature( Humdty (%RH Drvng Current (ma sde-vew top-vew left-most LED center left-most algnment mar center Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 9 Doc. 474A SEMI

11 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/ Mechancal Characterstc Measurement Report s provded n Table Optcal Characterstcs Measurement Report - Partal Lumnous Flu s provded n Table Optcal Characterstcs Measurement Report - Forward π Lumnous Flu s provded n Table Optcal Characterstcs Measurement Report - Lumnous Intensty s provded n Table Optcal Characterstcs Measurement Report - Total Lumnous Flu s provded n Table 6. Table Report Sample of Mechancal Characterstc Measurement Data Mechancal Characterstc Measurement Report Mechancal Orgn Devaton d, y = ( + ( y y Unt : mm Unlghted LED m, ( m, m, LED # Mechancal Orgn Specfc Orgn Mechancal Orgn Devaton m, y m, y d m, 1 O m,1 ( m1,y m1 O 1 ( 1,y 1 d m,1 O m, ( m,y m O (,y d m, 3 Mechancal X-as Devaton Δθ = θ, Unt: degree Unlghted LED LED # 1 θ ˆ ( ˆm, ˆ m, maor Mechancal X-as Angle Maor As Angle Mechancal X-as Devaton θ ˆ θ ˆ Δ ( m, 1 θ ˆ 3 ( m, ( maor Δ θ m,1 Δ θ m, Δ ( m, 0 θ ( ˆ m, 3 θ m, 3 Optcal Orgn Devaton Area of nterested-rato do, (, y = ( o, + ( yo, y Unt : mm Lghted LED of ma lumnance LED # Optcal Orgn Specfc Orgn Optcal Orgn Devaton o, y o, y d o, 1 O o,1 ( o1,y o1 O 1 ( 1,y 1 d o,1 O o, ( o,y o O (,y d o, 3 Optcal X-as Devaton Area of nterested-rato Δθ o, = θ ( ˆ o,, ˆ maor Unt: degree Lght LED of ma lumnance Optcal X-as Angle Maor As Angle Optcal X-as Devaton LED # θ ˆ θ ˆ 1 θ ˆ ( o, 1 θ ( ˆ o, 3 ( o, ( maor 0 Δ θ o,1 Δ θ o, θ m, Δθ o, Table 3 Report Sample of Optcal Characterstc Data under Partal Lumnous Flu Measurement Condtons Partal Lumnous Flu Unformty U Optcal Characterstc Measurement Report-Partal Lumnous Flu Mn( Φ p, = Ma( Φ p p, Color Non-unformty ' ' ' ' Δ u' v' = Ma( ( u u + ( v v Δ y = Ma ( ( + ( y Partal Lumnous Flu Color (Chromatcty Coordnate LED # Measurement Condton Unt : lm Φ p, u v y 1 Φ p, 1 (u 1,v 1 /( 1,y 1 specfc orgn Measurement Locaton Φ p, (u,v /(,y mechancal orgn 3 Lght Measurement Equpment 4 d Dameter D Worng Sold 5 of Open Dstance mm mm Angle 6 Port : D 7 Warm-up Measured sec Varaton % 8 Tme Perod y sr sec Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 10 Doc. 474A SEMI

12 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/010 9 Partal Lumnous Flu Unformty U p Color Nonunformty Table 4 Report Sample of Optcal Characterstc Data under Forward π Lumnous Flu Measurement Condtons Forward π Lumnous Flu Unformty Optcal Characterstc Measurement Report-Forward π Lumnous Flu Mn( Φ h, U h = Ma( Φ h, Color Non-unformty ' ' ' ' Δ u' v' = Ma( ( u u + ( v v Δ y = Ma ( ( + ( y Forward π Color (Chromatcty Coordnate LED # Lumnous Flu Measurement Condton Unt : lm Φ h, u v y 1 Φ h, 1 (u 1,v 1 /( 1,y 1 specfc orgn Measurement Locaton Φ h, (u,v /(,y mechancal orgn 3 Lght Measurement Equpment 4 Warm-up Measured sec Varaton % 5 Tme Perod 6 Forward π Color Non- Lumnous Flu unformty Unformty U h y sec Table 5 Report Sample of Optcal Characterstc Data under Lumnous Intensty Measurement Condtons Optcal Characterstc Measurement Report-Lumnous Intensty Color Non-unformty ' ' ' ' Lumnous Intensty Unformty Mn( I v, Δ u' v' = Ma( ( u u + ( v v U v = Ma( I Δ y = Ma ( ( + ( y y v, Lumnous Intensty Color (Chromatcty Coordnate LED # Measurement Condton Unt : cd I v, u v y 1 I v, 1 (u 1,v 1 /( 1,y 1 specfc orgn Measurement Locaton I v, (u,v /(,y mechancal orgn 3 Lght Measurement Equpment 4 Worng Sold mm sr 5 Dstance Angle 6 Warm-up Measured sec Varaton % 7 Tme Perod 8 Lumnous Color Non- Intensty unformty Unformty U v sec Table 6 Report Sample of Optcal Characterstc Data under Total Flu Measurement Condtons Optcal Characterstc Measurement Report-Total Flu Total Flu Total Flu Color (Chromatcty Coordnate Measurement Condton Unt: lm Φ t u t v t t y t Lght Measurement Equpment CRM descrpton Integrated Sphere Dameter Warm-up Tme sec Varaton % Measured Perod m sec NOTE 5: The measurement parameters showed n the reports wll depend on the actual demand. Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 11 Doc. 474A SEMI

13 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/010 APPENDIX 1 OPTICAL ORIGIN AND OPTICAL X-AXIS MEASUREMENT EXAMPLE A1-1 Set-up A1-1.1 Set the optcal as of an mage type photometer to le along a perpendcular as to the LED lght bar whch s beng tested. A1-1. Set the locaton of the mage type photometer over the specfc orgn poston of the LED whch s beng tested. A1-1.3 Set the constant current swtchng regulators to drve the LED lght bar. Set the drvng current of each LED to be 0 ma. A1-1.4 Set the warm-up tme to be 180 seconds (3 mnutes for the lumnance spatal dstrbuton measurement, wth ntensty varaton less than 0.1% durng the measurement perod of 1 mnute. A1- Measurement Procedure A1-.1 Optcal Orgn Measurement Procedure A Measure the lumnance spatal dstrbuton L(,y n -y plane whle the LED lght s on. (, y coordnate s the pel number n -as and y-as of the mage type photometer, and shown as Fgure A1-1. Fgure A1-1 Dagram of Lumnance Spatal Dstrbuton of LED Lght Bar (Partal Image A1-.1. Fnd the pel coordnates and the value of the mamum lumnance for each LED n the L(, y map. (n ths case L (,y = L (318,489 = counts, the center LED mage shown as followng fgures A Crcle the area n whch the pel value s greater than 1/10 of the mamum lumnance for each LED. In ths case the threshold value s counts, shown as Fgure A1-. Fgure A1- Dagram of the Mamum Lumnance Poston, the Contour of the Area to Calculate the Gravty Center, and the Optcal Orgn (Gravty Center of th LED A Calculate the gravty center coordnates of each LED wthn the area n whch the pel value s greater than 1/10 of the mamum lumnance. Ths coordnate s assgned as the optcal orgn coordnate O o, ( o,, y o, for th LED. They are calculated by the Equaton A1-1, and L (,y s the lumnance spatal dstrbuton of th LED. Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 1 Doc. 474A SEMI

14 Semconductor Equpment and Materals Internatonal 3081 Zaner Road San Jose, CA Document Number: 474A Date: 7/30/010 L,,, y, L, (A1-1 o, yo, L, L, For =1..m, m s the total samplng number of area of nterested. The area of nterested s the area whch lumnance s greater than 1/10 of mamum lumnance for th LED. In ths case, the O o, ( o,, y o, = (35.1, (the coordnate transfer to real dmensonal scale n mm, (0,0 s the 1 st algnment mar center. A1-. Optcal X-as Measurement Procedure A1-..1 Measure the lumnance spatal dstrbuton L (,y (as Fgure A1-3, and calculate the optcal orgn. O o, ( o,, y o, for th LED (the same as A1-.1, optcal orgn measurement procedure above. The red square represents the poston of mamum lumnance, and the green square represents the poston of optcal orgn n the Fgure A1-3. A1-.. Contour the area wth greater than 1/10 of mamum lumnance, and the red contour lne represents t n the Fgure A1-3. A1-..3 Then fnd the longest lne segment (.e., most pel numbers passng through the optcal orgn wthn ths area, and set the drecton followng the PCB maor as. The purple lne s the th optcal -as n the Fgure A1-3. Fgure A1-3 Dagram of the Mamum Lumnance Poston (Red Square, the Optcal Orgn(Green Square, the Contour (Red Lne of the Area to Determne the Optcal X-as, and the Optcal X-as (Purple Lne of th LED NOTICE: SEMI maes no warrantes or representatons as to the sutablty of the standard(s set forth heren for any partcular applcaton. The determnaton of the sutablty of the standard(s s solely the responsblty of the user. Users are cautoned to refer to manufacturer s nstructons, product labels, product data sheets, and other relevant lterature respectng any materals or equpment mentoned heren. These standards are subect to change wthout notce. By publcaton of ths standard, Semconductor Equpment and Materals Internatonal (SEMI taes no poston respectng the valdty of any patent rghts or copyrghts asserted n connecton wth any tem mentoned n ths standard. Users of ths standard are epressly advsed that determnaton of any such patent rghts or copyrghts, and the rs of nfrngement of such rghts are entrely ther own responsblty. Ths s a draft document of the SEMI Internatonal Standards program. No materal on ths page s to be construed as an offcal or adopted standard. Permsson s granted to reproduce and/or dstrbute ths document, n whole or n part, only wthn the scope of SEMI Internatonal Standards commttee (document development actvty. All other reproducton and/or dstrbuton wthout the pror wrtten consent of SEMI s prohbted. Page 13 Doc. 474A SEMI