UPD161623 datasheet(36/83 Pages) NEC

Teilenummer	UPD161623

Bauteilbeschribung	528 OUTPUT TFT-LCD SOURCE DRIVER WITH RAM

PDF	83 Pages

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Hersteller	NEC [NEC]

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Data Sheet S15817EJ2V0DS

µµµµPD161623

5.9

γγγγ-Curve Correction Power Supply Circuit

The

µ PD161623 includes a γ-curve correction power supply circuit. If the internal γ-curve correction matches the

LCD characteristics, no external components are necessary. This power circuit has white level and black level

reference voltage generators on the positive and negative polarity sides, and also supports unbalanced driving. The

reference voltage generators consist of a D/A converter and an operational amplifier and divide VS to VSS by 256. One

level of voltage can be selected by using the

γ-contrast value setting register1 to 4 (R36 to R39)

Figure 5–23.

γγγγ-Curve Correction Circuit

D/A

(R37)

D/A

(R36)

D/A

(R39)

D/A

(R38)

VPH

VNH

VPL

VNL

VSS

SPH1

SNL1

SNH1

SPL1

custom

SPH2

SNL2

VSS

VRH

VRL1

SPL2

SNH2

VRL2

UPD161623 Datenblatt(PDF) 36 Page - NEC