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參數(shù)資料
| 型號： | HD66108T00 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | (RAM-Provided 165-Channel LCD Driver for Liquid Crystal Dot Matrix Graphics) |
| 中文描述： | （內(nèi)存提供165通道的LCD液晶點(diǎn)陣圖形驅(qū)動(dòng)程序） |
| 文件頁數(shù)： | 34/60頁 |
| 文件大小： | 337K |
| 代理商： | HD66108T00 |
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HD66108
987
5. Multiplexing Duty Ratio and LCD Driving Waveform Settings
A multiplexing duty ratio and LCD driving waveform can be selected via internal registers.
A multiplexing duty ratio of 1/32, 1/34, 1/36, 1/48, 1/50, 1/64, or 1/66 can be selected according to the
LCD panel used. However, since there are only 65 row-output pins, only 65 lines will be displayed even
if 1/66 multiplexing duty ratio is selected.
There are three types of LCD driving waveforms, as shown in Figure 22: A-type waveform, B-type
waveform, and C-type waveform.
The A-type waveform is called per-half-line inversion. Here, the waveforms of M signal and CL1 signal
are the same and alternate every LCD line.
The B-type waveform is called per-frame inversion; in this case, the M signal inverts its polarity every
frame so as to alternate every two LCD frames. This is the most common type.
The C-type waveform is called per-n-line inversion and inverts its polarity every n lines (n can be set as
needed within 1 to 31 via the internal registers). The C-type waveform combines the advantages of the A-
and B-types of waveforms. However, some lines will not be alternated depending on the multiplexing
duty ratio and n. To avoid this, another C-type waveform is available which is generated from the EOR of
the C-type waveform M signal mentioned above and the B-type waveform M signal. Since the
relationship between n and display quality usually depends on the LCD panel, n must be determined by
observing actual display results.
The B-type waveform should be used if the LCD panel specifies no particular type of waveform.
However, in some cases, the C-type waveform may create a better display.
Block A
X31
X0
VMH1 VML1
Block B
X99
X32
V3
V4
Block C
X131
X100
VMH2 VML2
Block D
X164
X132
VMH3 VML3
LCD driving output pins
V6R V1R
V6L
V1L
LCD driving power supply pins
Figure 21 Relationship between Blocks and LCD Driving Voltages
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD66108TA0 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(RAM-Provided 165-Channel LCD Driver for Liquid Crystal Dot Matrix Graphics) |
| HD66108TB0 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(RAM-Provided 165-Channel LCD Driver for Liquid Crystal Dot Matrix Graphics) |
| HD66110RT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66110RTA8 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66110RTB0 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
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