參數(shù)資料
型號: HD66523R
廠商: Hitachi,Ltd.
英文描述: 240-Channel Common Driver with Internal LCD Timing Circuit(帶內(nèi)部LCD定時(shí)電路的240通道驅(qū)動(dòng)器)
中文描述: 240頻道共同的內(nèi)部LCD定時(shí)電路(帶內(nèi)部液晶定時(shí)電路的240通道驅(qū)動(dòng)器驅(qū)動(dòng)程序)
文件頁數(shù): 22/30頁
文件大小: 139K
代理商: HD66523R
HD66523R
22
LCD Driving Voltage
The theoretical voltage which is needed for the best quality of display is calculated with the following
equation. However, this voltage may be adjusted depending on the panel which is used.
VCH-VM, VM-VCL =
Vth:
N:
Threshold voltage of LCD
Display duty ratio
×
Vth
N
N – 1
N
×
N
N – 1
VRH-VM, VM-VRL =
×
Vth
1
2
Frame Frequency
HD66523R has a internal oscillator and generates all timing for driving LCD. The frame frequency varies
with the frequency of oscillator. The frame frequency is calculated with the following equation.
f
OSC
:
Nd:
Nvr:
Frequency of oscillator
Display duty ratio
Vertical retrace period
f
FRM
=
f
OSC
2 (Nd + Nvr)
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