奇景ICGamma TuningMobile Driver IC Gamma TuningFAE: Brad Chen 2006/02/151Gamma Tuning1. VCOM Setting & Feed through Compensation 2. Gamma Resistor String 3. Gamma Measurement 4. Gamma Tuning 5. Summary21. VCOM Setting & Feed through CompensationA. VCOMHπ(4V). B. VCOMLаFeed-through(Vgd). Feed-through , аCellDriver ICрVgd.VCOMHDriver IC Output Vgd Real Cell levelReal LC voltageVCOML3C. Vgam1outGamma. 4.3~4.8V (VRH= 0010~0101) Vci1(REGP) =Vci, 2.65~2.7V (Vci-0.15).VRH3 VRH2 VRH1 VRH0 VGAM1OUT0 0 0 00 0 1 11 1 0 00 1 0 1REGP x 1.55 (2.7*1.55=4.19V) REGP x 1.65 (2.7*1.65=4.45V) REGP x 1.75 (2.7*1.75=4.72V) REGP x 1.80(2.7*1.8=4.88V)VCOMHVgam1outGammaD10D0D63NegativeD0D63PositiveVCOML4D. VCOMH3.6V~4.1V, (VCM4-0=10100~11011) VCOMH Step=0.02*Vgam1out,80~90mV.R/……
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