Renesas R61509V Manuel D’Utilisation
R61509V
Target
Spec
Rev. 0.11 April 25, 2008, page 142 of 181
γ Correction Function
γ Correction Function
The R61509V supports
γ-correction function to make the optimal colors according to the characteristics of
the panel. The R61509V has registers for positive and negative polarities.
γ Correction Circuit
The following figure shows the γ-correction circuit. According to the settings of variable resistors R0 to R8,
the voltage level, the difference between VREG1OUT and VGS, is evenly divided into 8 grayscale
reference voltages (V0, V1, V8, V20, V43, V55, V62, and V63). Other 56-grayscale voltages are
generated by setting the level at a certain interval between the reference voltages. For grayscale voltage,
see “Grayscale Voltage Calculation Formula”.
the voltage level, the difference between VREG1OUT and VGS, is evenly divided into 8 grayscale
reference voltages (V0, V1, V8, V20, V43, V55, V62, and V63). Other 56-grayscale voltages are
generated by setting the level at a certain interval between the reference voltages. For grayscale voltage,
see “Grayscale Voltage Calculation Formula”.
㪭㪇
㪭㪈
㪭㪏
㪭㪉㪇
㪭㪋㪊
㪭㪌㪌
㪭㪍㪉
㪭㪍㪊
Linear
interpolation
interpolation
Interpolation
adjustment
adjustment
Interpolation
adjustment
adjustment
R: Resistor outputting voltage evenly divided into 12
(1R): Trimming step
(1R): Trimming step
2~33R (1R)
1~32R (1R)
2~33R (1R)
4~19R (1R)
8~23R (1R)
0~31R (1R)
1~32R (1R)
2~33R (1R)
4~19R (1R)
VGS (=GND)
R0
R1
R2
R3
R4
R5
R6
R7
R8
VREG1OUT
Figure 60