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S5D4100X Datasheet(PDF) 40 Page - Samsung semiconductor

Part No. S5D4100X
Description  Digital Interface Including Scaler, Image Enhancement
Download  94 Pages
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Maker  SAMSUNG [Samsung semiconductor]
Homepage  http://www.samsung.com/Products/Semiconductor
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S5D4100X Datasheet(HTML) 40 Page - Samsung semiconductor

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DATASHEET
S5D4100X
40
5.10 CONTRAST CONTROL
The contrast block is designed to control R/G/B of Register BLACK (0x0081~0x0083), Register CONTRAST
(0x0084~0x0086) and Register BRIGHTNESS (0x0087~0x0089). The block can also control them individually
based on R. Black level and Brightness play the role of offset, and Contrast plays the role of gain.
Each pixel value is calculated as below.
Rout = [Rin - Blacklevel(Red)] * Contrast(Red) + Brightness(Red)
Gout = [Gin - Blacklevel(Green)] * Contrast(Green) + Brightness(Green)
Bout = [Bin - Blacklevel(Blue)] * Contrast(Blue) + Brightness(Blue)
5.11 GAMMA
The gamma correction block performs correction of the characteristics of the TFT-LCD panel. The block divides
the input signal level into sections, generates the non-linear characteristic curve, and performs the gamma
correction by substituting each section with linear function through linear interpolation. In other words, the block
divides input into sections, and varies the output of each section to transform the characteristic curve for gamma
correction. The input signal has the data level of 8 bits, and is equally divided into 32 sections with the interval of 8
between the sections.
The block receives the output value for each equally divided level from MCU, performs non-linear gamma
correction, and for the values between the levels, the block performs gamma correction via linear interpolation.
0
RYAV1
RYAV2
RYAV3
RYAV4
RYAV30
RYAV31
RYAV32
X
Y
816
24
32
.. .. 240 248 255
Figure 30. Gamma Graph


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