Table 7-1. Grayscale

Value and Landed Duty

Cycle

Grayscale

Value

Landed Duty

Cycle

0%

0/100

10%

10/90

20%

20/80

30%

30/70

40%

40/60

50%

50/50

60%

60/40

70%

70/30

80%

80/20

90%

90/10

100%

100/0

Accounting for color rendition (but still ignoring image processing) requires knowing both the color intensity (from

0% to 100%) for each constituent primary color (red, green, and/or blue) for the given pixel as well as the color

cycle time for each primary color, where “color cycle time” is the total percentage of the frame time that a given

primary must be displayed in order to achieve the desired white point.

During a given period of time, the landed duty cycle of a given pixel can be calculated as follows:

Landed Duty Cycle = (Red_Cycle_% × Red_Scale_Value) + (Green_Cycle_% × Green_Scale_Value) + (Blue_Cycle_%

×

Blue_Scale_Value)

(4)

where

• Red_Cycle_%, Green_Cycle_%, and Blue_Cycle_% represent the percentage of the frame time that Red,

Green, and Blue are displayed (respectively) to achieve the desired white point.

For example, assume that the red, green and blue color cycle times are 50%, 20%, and 30% respectively (in

order to achieve the desired white point), then the Landed Duty Cycle for various combinations of red, green,

blue color intensities would be as shown in Table 7-2.

www.ti.com

DLP2000

DLPS140B – MARCH 2019 – REVISED MAY 2022

Copyright © 2022 Texas Instruments Incorporated

Submit Document Feedback

21

Product Folder Links: DLP2000