完善资料让更多小伙伴认识你,还能领取20积分哦, 立即完善>
扫一扫,分享给好友
|
|
相关推荐
1个回答
|
|
LCD Bias(LCD 偏置电压)数代表使用了多少个电压参考点来驱动LCD。偏置电压通常由电阻分压网产生。如最底下的图示出了1/5 Bias,使用Vdd=5V,电阻的数量由上表来决定。
电阻器的电阻值由要求的电压参考点和可能的波形失真决定。因为LCD是容性负载,电阻值应当降低以减少失真,或者用更大的显示屏,使用运放来缓冲电压参考点。 The control signals that drive an LCD are AC in nature. The basic configuration of how to generate a waveform to control an LCD are covered in the sections "LCD Multiplex Ratio (above)" and "LCD Static Drive Technology". But to control LCDs with a larger multiplex ratio, we need to provide the waveform generator with multiple bias voltage level points. The resulting waveform sent to the LCD segment/dot control lines and backplane commons will contain a stair-stepped waveform that will maintain specific ac voltages across any given segment/dot to keep it in it's "on" or "off" state (or in a grayscale module, states between those two points). The LCD Bias number (example: 1/5 bias) will indicate how many voltage reference points are created to drive a specific LCD. The table below shows the relationship between the number of driving bias voltages and the display multiplex ratios typically used:
The necessary bias voltages are usually generated by the use of a resistor dividing network, and example of which is shown below using Vdd at 5 volts, and the number of resistors in the ladder determined using the table above.The values of the resistors is determined by the required voltage reference points and possible waveform distortion. Because an LCD is a capacitive load, the values should be decreased to decrease distortion, or with larger displays, buffering the voltage reference points with op-amps. |
|||||||||||||
|
|||||||||||||
只有小组成员才能发言,加入小组>>
ADP5092 SYS端口为2.09V,但是REG_OUT为0是什么原因?
1378 浏览 1 评论
ad7193差分输入ain1与ain2差是正值时,读到电压与实际值误差小,但为负值值,误差就变的很大
3969 浏览 2 评论
8637 浏览 1 评论
2941 浏览 1 评论
6759 浏览 2 评论
ADC3442采集,分析数据出现有规则毛刺,请问是哪方面的问题啊?
801浏览 3评论
AD7190状态寄存器一直是0x80,连续转换模式下RDY不拉低
1112浏览 2评论
1042浏览 2评论
820浏览 1评论
815浏览 1评论
小黑屋| 手机版| Archiver| 电子发烧友 ( 湘ICP备2023018690号 )
GMT+8, 2024-5-16 09:35 , Processed in 0.730451 second(s), Total 76, Slave 60 queries .
Powered by 电子发烧友网
© 2015 bbs.elecfans.com
关注我们的微信
下载发烧友APP
电子发烧友观察
版权所有 © 湖南华秋数字科技有限公司
电子发烧友 (电路图) 湘公网安备 43011202000918 号 电信与信息服务业务经营许可证:合字B2-20210191 工商网监 湘ICP备2023018690号