LU850425 查看數據表（PDF） - Sharp Electronics

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产品描述 (功能)

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LU850425

8-bit Microcomputer for DSP Camera Systems

Sharp Electronics 

(3) Window Selection of Emphasis Range at Auto Exposure

INPUT VOLTAGE (PIN 49)

0 to 0.8 V

0.81 to 1.6 V

1.61 to 2.4 V

2.41 to 3.3 V

Preset 1

Preset 2

Preset 3

Whole range

RANGE SELECTION

See "Fig. 1".

See "Fig. 1".

See "Fig. 1".

LU850425

Preset 1

A

Preset 2

A

Preset 3

A

A

A

A

C

C

C

A

B

B

B

A = 25% B = C = 100%

Emphasis range

Fig. 1 Emphasis Range

Auto Exposure Control

• Auto exposure control has the following three

functions :

q E/E (Electronic Exposure) function

w Mechanical exposure function

e AGC (Automatic Gain Control) function

Auto White Balance Control

• Control method : A white color temperature

control is sampled by an I/Q conversion signal.

• By the reasoning of the video condition from I/Q,

brightness, and other signal levels, white balance

is controlled to keep the best condition.

Carrier Balance Control

• Carrier balance control has the following two

functions.

q At power on, carrier balance is automatically

tuned.

w Carrier balance is automatically tuned against

AGC operation.

10

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