Shaun Chen, CY Liang, Jackson Tsai , Cedric Wang
Intel Ecosystem Acceleration Group
April, 2020
Intel® Low Power Display Technology (LPDT) 2.1 Specification
Client Computing Group
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revision History
Resolved brightness definition unclear portion by adding TYP , MIN number in brightness defintion. - spread sheet "LPDT 2.0 spec" change to "LPDT 2.1 spec "- Measurement brightness change from "panel only @185 nits " by adding another column with " Display with Touch and Cover Glass @150 nits" due to multi-request from the field. - Modify LPDT 2.1 spec spread sheet from original "Max Brightness @5 point (stand alone) : 400 nits (Min)" to " Max Brightness @5 point : 400 nits (Typ) 340 nits (Min) " and add " Max Brightness @5 point (Panel with Touch and cover glass) : 340 nits (Typ) 290 nits (Min) " cause multi-reqeusts from field. - Add flicker testing only on panel claimed ≤ 40Hz4 Optics measurement also change from original 250 nits to 2 different column- Panel Standalone (inclduing In Cell and On Cell w/o Cover Glass) 300nits : considering system is measuring 250 nits which is expected with touch and stylus- With Cover Glass and Touch or System Module Panel 250 nits : as same reason of abovetable of 13.3-14" change to 13.0 - 14" to cover other size possibility And defined the other resolution critieria by adding wording " Guideline for other resolutions: The power criteria of the next higher resolution, based on the other resolution’s aspect ratio, will be used" and adding an example
2020/4/13 LPDT 2.1
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Matrix of LPDT 2.1
*1 LPDT 1.0 is assumed panel without touch feature. Power level measurement brightness level is setting as 150 nits as default.*2 LPDT 2.0 Single and Dual Display configuration is assumed as end product brightness is 150 nits ( with Touch/Stylus and cover lens), so Display standalone need to be measured @185 nits *3 Premium Display is Categorized LCD /OLED display with UHD resolution , DCI-P3 95% (Typ) 90% (Min) , HDR 500 or HDR 400 (TB) + Local Dimming as criteria , border (L,R,T) and panel thickness ≤ 2.05mm and Reflection rate <5% is optional *4 LPDT 2.0 for premium display is assumed as end product is 100 nits ( with Touch/Stylus and cover lens). Display standalone need to be measured @ 120 nits *5 PSR2/LRR is required item to test in LCD (PSR2/LRR is optional for OLED) *6 If premium display is OLED type, DPST is not required since this is BLU required power saving function; And DMRRS is also optional*7 Panel stand alone still measure 185 nits for Single and Dual Display/ 120 nits for Premium display if system design is without CG or/and add-on touch. *8 Flicker only test panel which claimed reaching ≤ 40Hz (flicker is not essential to test if panel is >40 Hz )
Spec for Brightness
Measurement point
Power Flicker*8 DPST/DMRRS*5 Test Pattern
LPDT 1.0(2018-2019) For Single Display only*1 150 nits Ö Recommended Ö MobileMark 2014
Single *2 185 nits*7 Ö Ö Ö MobileMark 2018
Premium Display *3 *4 120 nits*7 Ö Ö Ö*6MobileMark 2018
+ HDR Video Stream
Dual Display *2 185 nits*7 Ö Ö Ö MobileMark 2018
LPDT 2.0(2020~)
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Panel Power Measurement (LPDT 2.1) Test Scenario and Setting
Ø Idle Scenarios
ü 32x32 Mosaic
ü Win10 Default Wallpaper
Ø Video Scenarios
ü Tears of Steel Video
ü Mobile Mark 2018
ü HDR Video Stream
Ø Backlight Settings:
ü 185 nits
ü 120 nits for Premium Display
ü Maximum Brightness
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LPDT Panel Test CriteriaLPDT Hardware Spec. 2.1 - Page 1
LRR : Defined as Intel LRR technology , LRR 1.0 or newer version
Display only Display with Touch and
Cover Glass@185 Nits @150 Nits
16:9 Logic1920x1080 Backlight
3:2 Logic1920x1280 Backlight
16:9 Logic2560X1440 Backlight Max Brightness @5 point (Stand Alone) : 400 nits (Typ) 340 nits (Min)
Max Brightness @5 point (Panel with Touch and cover glass) : 340 nits (Typ) 290 nits (Min) 16:9 Logic 32x32 Mosaic Pattern (Idle)
1920x1080 Backlight 8 Bits100% sRGB (typ) , 95% sRGB (Min)
3:2 Logic Panel Thickness T ≤ 2.05 mm1920x1280 Backlight Bezel (L/R/U) ≤ 2.55mm
Constrast Ratio : 1500:1 (Typ) 800:1 (Min)16:9 Logic 16:10 panel is same criteria with 16:9
2560X1440 Backlight PSR2/LRR is reqruied
3:2 Logic3000x2000 Backlight example : 3:2 2880X1920 critieria is same as 3:2 3000X2000
16:9 Logic
3840x2160 Backlight
Power: mW
Total Power
Feature
Brightness Spec
12.3~12.5"
13.0~14"
Total Power
Total Power
Total Power
Remark
Total Power
Total Power
Total Power
Total Power
350650
1000350850
1200400850
1250350850
1200350
10501400400
11001500500
12501750800
14502250
Guideline for other resolutions: The power criteria of the next higher resolution, based on the other resolution’s aspect ratio, will be used
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LPDT Panel Test Criteria (Cont.)LPDT Hardware Spec. 2.1 - Page 2
LRR : Defined as Intel LRR technology , LRR 1.0 or newer version
Display only Display with Touch and
Cover Glass@185 Nits @150 Nits
16:9 Logic1920x1080 Backlight
Max Brightness @5 point (Stand Alone) : 400 nits (Typ) 340 nits (Min) 3:2 Logic Max Brightness @5 point (Panel with Touch and cover glass) : 340 nits (Typ) 290 nits (Min)
1920x1280 Backlight 32x32 Mosaic Pattern (Idle)8 Bits
16:9 Logic 100% sRGB (Typ) , 95% sRGB (Min) 2560X1440 Backlight Panel Thickness T ≤ 2.7mm (Max)
Bezel (L/R/U) ≤ 2.55mm3:2 Logic Constrast Ratio : 1500:1 (Typ) 800:1 (Min)
3000x2000 Backlight 16:10 panel is same criteria with 16:9 PSR2/LRR is reqruied
16:9 Logic3840x2160 Backlight
example : 3:2 2880X1920 critieria is same as 3:2 3000X2000
15.6"
Power: mWFeature
Brightness Spec
Total Power
Total Power
Total Power
Total Power
Total Power
Remark
1400350
12001550
350
Guideline for other resolutions: The power criteria of the next higher resolution, based on the other resolution’s aspect ratio, will be used
1900800
17002500
40014001800500
1400
1050
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LPDT 2.1 Test Criteria for Premium DisplayPremium Display Definition :
§ UHD resolution is required
§ High color gamut higher than DCI-P3 95% (Typ) 90% (Min) , local dimming is required
§ HDR400+Trueblack or HDR500 is required
§ Panel Thickness, and Top/Left/Right bezel ≤ 2.05 mm
§ Lower down the luminance to 100nit due to human perception on Power testing
§ Panel reflection rate including touch should be less than 5% (optional)
Criteria : Display with Touch & Stylus
@120 Nits
16:9
3840X2160
16:9
3840X2160
Premium Display 13.3"
UHD ,DCI-P3 95% (Typ) 90% (Min) , HDR 500 or HDR 400 (TB) + Local Dimming , border (L,R,T) and panel thickness ≤ 2.05mm , Reflection
rate <5% is optional (PSR2/LRR is optional for OLED)Whole panel 3800
Power: mWFeature
RemarkBrightness Spec
4400Whole panelPremium Display 15.6"
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Optics Test Specification
Test Item Panel Standalone (inclduing In
Cell and On Cell w/o Cover Glass)
With Cover Glass and Touch or System Module Panel
Brightness 300 nits (Min) 250 nits (Min)Color Gamut (100% sRGB)
Color Accuracy (∆E)Viewing Angles
sRGB 90% (Min)≤4
150o (Min)
Criteria
Client Computing Group
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