參數(shù)資料
型號(hào): HD66522
廠商: Hitachi,Ltd.
英文描述: 160-Channel Column Driver with Internal Bit-Map RAM for Reflective Color Display and Grayscale Display(點(diǎn)陣圖形LCD160通道驅(qū)動(dòng)器)
中文描述: 160通道,內(nèi)置欄位為反射式彩色顯示和灰度顯示屏(點(diǎn)陣圖形LCD160通道驅(qū)動(dòng)器地圖RAM驅(qū)動(dòng)器)
文件頁(yè)數(shù): 14/47頁(yè)
文件大小: 276K
代理商: HD66522
HD66522
14
Half Tone Display (FRC: Frame Rate Control Function)
The HD66522 incorporates an FRC function to display four-level grayscale half tone. Since the HD66522
contains 32-level tone to drive reflective colour liquid crystal, four-level would be selected which adapt to
the using liquid crystal.
The FRC function utilizes liquid crystal characteristics whose transmittance is changed by an effective
value of applied voltage.
Half tone or reflective colour liquid crystal is expressed in addition to display on/off.
Since the HD66522 has two-bit grayscale data per one pixel, it can display four level grayscale or four-
colour and improve user interface (Figure 5). Figure 6 shows the relationships between the effective
voltage value and transmittance.
Edit
a) Display with two values
b) Display with four values
Edit
Figure 5 Example of User Interface Improvement
T
White
Effective Voltage
Black (Green)
divided by 32
Figure 6 Effective Voltage Values vs. Transmittance
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