UPD161831 Datasheet, PDF (52/67 Pages) NEC – 240/244-OUTPUT TFT-LCD SOURCE DRIVER WITH TIMING GENERATOR

µPD161831
9. γ -CORRECTION POWER SUPPLY CONNECTION EXAMPLE
The µPD161831 enables customization of the γ -correction power supply on both the positive and negative polarity
sides (For details, refer to 7. RELATIONSHIP BETWEEN INPUT DATA AND OUTPUT VOLTAGE VALUE).
Consequently, a γ -correction power supply does not have to be input externally when a single source-driver chip is
being used in the panel.
Figure 9−1. γ -Correction Power-Supply Connection Example
Single chip
<Example 1 (GAM = L)>
Open
V0 V1 V2 V3 V4
<Example 2 (GAM = H)>
External power
supply input
PD161831
V0 V1 V2 V3 V4
PD161831
Multiple chip
<Example 1 (GAM = L)>
Vn - Vn short
V0 V1 V2 V3 V4
PD161831
<Example 2 (GAM = H)>
External power
supply input
V0 V1 V2 V3 V4
PD161831
V0 V1 V2 V3 V4
PD161831
V0 V1 V2 V3 V4
PD161831
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Preliminary Product Information S16269EJ2V0PM