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2007 Professional Models Sub-field Drive System Dynamic Brightness Control.

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Presentation on theme: "2007 Professional Models Sub-field Drive System Dynamic Brightness Control."— Presentation transcript:

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2 2007 Professional Models Sub-field Drive System Dynamic Brightness Control

3 2007 Professional Models Sub-field Drive System Dynamic Brightness Control

4 2007 Professional Models Sub-field Drive System 2 nd field 1 st field 3 rd field 60 th 1.0 sec 1 field (16.67msec) Sub-field No Long discharge time Short discharge time.

5 2007 Professional Models Sub-field Drive System 1 field (16.67msec) Sub-field No Bright Red Darker Red 1 field (16.67msec) Sub-field No Integration of “ALL” Sub- fields Only a few Sub-fields is used Black “NO (=0)” Sub-field is used BRIGHT !! DARK !! BLACK !

6 2007 Professional Models 8 Sub Fields Pixel Data Data Brightness control

7 2007 Professional Models Initialize Scan & Write Sustain Sub-Field Sub-field Drive System

8 2007 Professional Models InitializeAddress Sustain AddressPeriodSustainPeriod One Sub Field (Set up) Sub-field Drive System (Scan & Write)(Emission)

9 2007 Professional Models Address Period (Initialize + Scan & Write ) 1 TV Field (PAL 20ms / NTSC 16.7ms) Sustain 1st 2nd 3rd 4th 5th 6th 7th 8th S.F. The brightness can be controlled by combining different number of the Sub Fields 8-bit Data8 Sub Fields Sub Field Drive System

10 2007 Professional Models Sub-Field Drive System 1st SF 2nd SF3rd SF4th SF5th SF6th SF 7th SF8th SF9th SF10th SF11th SF12th SF 1 TV Field (NTSC 16.7ms) InitializeSustainScan & Write

11 2007 Professional Models Standard TV = Interlace Scan 1 Picture = 1 Frame ( 2 Field) Dot Sequence + Interlace

12 2007 Professional Models Progressive Scan 1 Picture = 1 Field Dot Sequence + Progressive

13 2007 Professional Models 1 Picture = 1 Field (Progressive Scan) Plasma Display : Sub-Field Drive System

14 2007 Professional Models Gradation

15 2007 Professional Models Address Data Brightness control : Sub-field No. 1 or 0 Brightness can be controlled by combination of active “Sub-fields” = Gradation

16 2007 Professional Models Brightness control Possible gradation ?? 2 8 =256 Possible number of colors ?? = 16,777,216 (16mil color) In case of 8 x Sub-fields  The most brightest case? : = 72  Black? : 0  Intermediate brightness? : = 8

17 2007 Professional Models 8 Sub-fields system 12 Sub-fields system Increase of number of Sub-fields  Gradation up ?? Is it good ?? Yes but No, there is a trade-off with “Brightness” Therefore, Panasonic uses more complicate Sub-fields operation to achieve both BEST gradation & brightness

18 2007 Professional Models 103PF965PF950PF9 50PH942PH942PS937PG942PG9 Brightness Gradation4096* 3072* C/R (brigh room) Max 5000:1 Max 10000:1 C/R (dark room) 400:1 103PF1065PF1050PF1058PH1050PH1042PH1042PS1037PG1042PG10 Brightness Gradation 3072* C/R (brigh room) Max 10000:1 C/R (dark room) 400:1 * : what is “equivalent” ?? * : equivalent

19 2007 Professional Models FHD case 4,096 steps of gradation Max 16-bit Digital Processing Give finer Sub-fields control for “darker” scene = Higher gradation in darker scene 4,096 gradation < 4,096 Luminosity A minimum unit to feel that the brightness changed in human sight Bright scene Dark scene Human eyes are insensitive to the brightness change in higher lumiosity area


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