参数资料
| 型号： | PCA85132U/2DB/Q1,0 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 14/62页 |
| 文件大小： | 0K |
| 描述： | IC LCD DRIVER 32 UNCASED |
| 标准包装： | 600 |
| 显示器类型： | LCD |
| 配置： | 多重 |
| 接口： | I²C |
| 数字或字符： | 任何数字类型 |
| 电流 - 电源： | 60µA |
| 电源电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 95°C |
| 封装/外壳： | 模具 |
| 供应商设备封装： | 模具 |
| 包装： | 散装 |
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NXP Semiconductors
PCA85132
LCD driver for low multiplex rates
n = 3 for 1:3 multiplex drive mode
n = 4 for 1:4 multiplex drive mode
The RMS off-state voltage (V off(RMS) ) for the LCD is calculated with Equation 3 :
a 2 – 2a + n
n ? ? 1 + a ?
V off ? RMS ? =
V LCD
------------------------------
2
(3)
Discrimination is the ratio of V on(RMS) to V off(RMS) and is determined from Equation 4 :
V on ? RMS ?
a + 2a + n
a – 2a + n
D = ----------------------- =
V off ? RMS ?
2
---------------------------
2
(4)
Using Equation 4 , the discrimination for an LCD drive mode of 1:3 multiplex with
1 ?
2
bias is
3 = 1.732 and the discrimination for an LCD drive mode of 1:4 multiplex with
bias is ---------- = 1.528 .
1 ?
2
21
3
The advantage of these LCD drive modes is a reduction of the LCD full scale voltage V LCD
as follows:
? 1:3 multiplex ( 1 ? 2 bias): V LCD =
6 ? V off ? RMS ? = 2.449V off ? RMS ?
? 1:4 multiplex ( 1 ? 2 bias): V LCD = ? ---------------------- ? = 2.309V off ? RMS ?
4 ? 3
3
These compare with V LCD = 3V off ? RMS ? when 1 ? 3 bias is used.
V LCD is sometimes referred as the LCD operating voltage.
7.3.3.1
Electro-optical performance
Suitable values for V on(RMS) and V off(RMS) are dependent on the LCD liquid used. The
RMS voltages, at which a pixel is switched on or off, determine the transmissibility of the
pixel.
For any given liquid, there are two threshold values defined. One point is at 10 % relative
transmission (at V th(off) ) and the other at 90 % relative transmission (at V th(on) ), see
V on ? RMS ? ? V th ? on ?
V off ? RMS ? ? V th ? off ?
(5)
(6)
V on(RMS) and V off(RMS) are properties of the display driver and are affected by the selection
of a (see Equation 2 ), n (see Equation 4 ), and the V LCD voltage.
V th(off) and V th(on) are properties of the LCD liquid and can be provided by the module
manufacturer. V th(off) is sometimes named V th . V th(on) is sometimes named saturation
voltage V sat .
PCA85132
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 11 July 2013
? NXP B.V. 2013. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA85133 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Universal LCD driver for low multiplex rates |
| PCA85133U/2DA/Q1 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Universal LCD driver for low multiplex rates |
| PCA85133U/2DA/Q1,0 | 功能描述:IC LCD DRIVER UNIV UNCASED RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| PCA85133U/2DB/Q1 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Universal LCD driver for low multiplex rates |
| PCA85133U/2DB/Q1,0 | 功能描述:IC LCD DRIVER UNIV UNCASED RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
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