STE2004DIE1(2004) 查看數據表（PDF） - STMicroelectronics

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STE2004DIE1
(Rev.:2004)

102 X 65 SINGLE CHIP LCD CONTROLLER / DRIVER

STMicroelectronics 

STE2004

3.7 Temperature Coefficients

As the viscosity, and therefore the contrast, of the LCD are subject to change with temperature, there's

the need to vary the LCD Voltage with temperature. STE2004 provides the possibility to change the VLCD

in a linear fashion against temperature with eight different Temperature Coefficient selectable through T2,

T1 and T0 bits. Only four of them are available through basic instruction set.

Table 5.

NAME

TC1

TC0

Value

Unit

TC0

0

0

-0.0· 10-3

1/ °C

TC2

0

1

-0.7 · 10-3

1/°C

TC3

1

0

-1.05· 10-3

1/°C

TC6

1

1

-2.1 · 10-3

1/°C

Table 6.

NAME

T2

T1

T0

Value

Unit

TC0

0

0

0

-0.0· 10-3

1/ °C

TC1

0

0

1

-0.35 · 10-3

1/°C

TC2

0

1

0

-0.7 · 10-3

1/°C

TC3

0

1

1

-1.05· 10-3

1/°C

TC4

1

0

0

-1.4 · 10-3

1/°C

TC5

1

0

1

-1.75· 10-3

1/°C

TC6

1

1

0

-2.1 · 10-3

1/°C

TC7

1

1

1

-2.3· 10-3

1/°C

Figure 7.

VLCD

B

A2

A0 + B

A1

A1

00h 01h 02h 03h 04h 05h …. 7Ch 7Dh 7Eh 7Fh 00h 01h 02h 03h 04h 05h …. 7Ch 7Dh 7Eh 7Fh 00h 01h 02h 03h 04h 05h …. 7Ch 7Dh 7Eh 7Fh

PRS = [0;0]

PRS = [0;1]

PRS = [1;0]

VO

Finally, the VLCD voltage at a given (T) temperature can be calculated as:

VLCD(T) = VLCDo · [1 + (T-To) · TC]

9/66

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