PCF8545ATT datasheet(41/103 Pages) NXP

tên linh kiện	PCF8545ATT

Giải thích chi tiết về linh kiện	Automotive 102 x 4 Chip-On-Glass LCD segment driver

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PCA8530

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Product data sheet

Rev. 2 — 25 September 2014

41 of 103

NXP Semiconductors

PCA8530

Automotive 102 x 4 Chip-On-Glass LCD segment driver

8.10.4.2

Temperature adjustment of the VLCD

Due to the temperature dependency of the liquid crystal viscosity, the LCD supply voltage

may have to be adjusted at different temperatures to maintain optimal contrast. The

temperature characteristics of the liquid is provided by the LCD manufacturer. The slope

has to be set to compensate for the liquid behavior. Internal temperature compensation

can be enabled via bit TCE (see Table 17 on page 17).

The ambient temperature range is split up to six programmable regions and to each a

different temperature coefficient can be applied (see Figure 23).

(1) Environment temperature, T1 (

C).

(2) Measured temperature, T2 (

C).

(3) Temperature deviation,

T=T2  T1.

Fig 22. Temperature measurement delay

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