Data signal processing device and display device having the same
AssigneeSamsung Display Co., Ltd.
InventorsByung-Ki Chun, Jae-Shin Kim, Jeong-Hun So, Won-Woo Jang
Life of this patent
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Abstract
A data signal processing device includes a load calculator and a compensation processor. The load calculator calculates an on-pixel rate (OPR) based on image data signals and positional weight values. The positional weight values are determined based on locations of pixels in a display panel. The OPR is proportional to a frame luminance load, which corresponds to a sum of driving currents for the pixels to emit light in each of a plurality of frames. The compensation processor compensates distorted luminance caused by the frame luminance load based on the OPR.
Claims12
A data signal processing device, comprising:
- a load calculation circuit to calculate an on-pixel rate (OPR) based on image data signals and positional weight values, the positional weight values to be determined based on locations of pixels in a display panel, the OPR proportional to a frame luminance load which corresponds to a sum of driving currents for the pixels to emit light in each of a plurality of frames;
- and
- a compensation processor to compensate a distorted luminance caused by the frame luminance load based on the OPR, wherein
- the positional weight values are determined according to amounts of voltage drops of a power voltage supplied to the pixels.
A data signal processing device, comprising:
- a load calculation circuit to calculate an on-pixel rate (OPR) based on image data signals and positional weight values, the positional weight values to be determined based on locations of pixels in a display panel, the OPR proportional to a frame luminance load which corresponds to a sum of driving currents for the pixels to emit light in each of a plurality of frames;
- and
- a compensation processor to compensate a distorted luminance caused by the frame luminance load based on the OPR, wherein the OPR is calculated based on the following equation:
- OPR
- =
- ∑
- k
- =
- 1
- n
-
-
- (
- ∑
- l
- =
- 1
- m
-
-
- (
- (
- RData
-
- (
- k
- ,
- l
- )
- ×
- cr_r
- +
- GData
-
- (
- k
- ,
- l
- )
- ×
- cr_g
- +
- BData
-
- (
- k
- ,
- l
- )
- ×
- cr_b
- )
- ×
- loc_w
-
- (
- k
- ,
- l
- )
- /
- 3
- )
- )
- (
- cr_r
- +
- cr_g
- +
- cr_b
- )
- ×
- avg
-
- (
- loc_w
- )
- ×
- n
- ×
- m
- ,
- where n is a number of columns of the display panel, m is a number of rows of the display panel, RData is an image data signal corresponding to a grayscale value of red light, GData is an image data signal corresponding to a grayscale value of green light, BData is an image data signal corresponding to a grayscale value of blue light, loc_w is the positional weight value, avg(loc_w) is an average value of the positional weight value, cr_r is the color weight value of a red light emitting pixel, cr_g is the color weight value of a green light emitting pixel, and cr_b is the color weight value of a blue light emitting pixel.
A display device, comprising:
- a display panel including a plurality of pixels;
- a display panel driver to drive the display panel;
- and
- a timing controller to control the display panel driver, wherein the timing controller has a data signal processor which includes:
- a load calculation circuit to calculate an on-pixel rate (OPR) based on image data signals and positional weight values determined based on locations of the pixels in the display panel, the OPR proportional to a frame luminance load which corresponds to a sum of driving currents for the pixels to emit light in each of a plurality of frames;
- and
- a compensation processor to compensate a distorted luminance caused by the frame luminance load based on the OPR, wherein
- the positional weight values are determined according to amounts of voltage drops of a power voltage supplied to the pixels.
Dependencies are inferred from the claim text.