LR38603 datasheet(21/26 Pages) SHARP

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LR38603

Electronic exposure control data =

[{Weighted data 1 q x (64 – CW_E (address 13h))

+ Weighted data 2 w x CW_E}/64

x (256 – P_HEE (address 17h) – P_LEE (address 18h))

+ Top level e x P_HEE + Bottom level r x

P_LEE]/256

q Weighted data 1

This comes from the following equation weighting in

horizontal.

Weighting factors are the data from UW_E1

(address 0Bh) to UW_E8 (address 12h).

Weighted data 1 =

{(Y11 + Y12 + π + Y18)/8 x UW_E1 (address 0Bh)

+ (Y21 + Y22 + π + Y28)/8 x UW_E2 (address 0Ch)

+ (Y81 + Y82 + π + Y88)/8 x UW_E8 (address

12h)}/256

The sum from UW_E1 to UW_E8 shall be 256.

w Weighted data 2

Weighting area can be set by the data of CWP_E

(address 14h), CWA_E (address 15h).

Weighting position can be set by the data of

CWP_E.

Weighting area size can be set by the data of

CWA_E.

Weighted data come from averaged data in chosen

area.

e Top level : The highest luminance data in one

image by averaging either 4 pixels

or 8 pixels in horizontal.

r Bottom level : The lowest luminance data in

one image by averaging either 4

pixels or 8 pixels in horizontal.

Auto White Balance Control

If white balance control data are less than the data

of AWB_IW_S and AWB_QW_S (address 40h),

then AWB stops.

If white balance control data are less than the data

of AWB_IW_L (address 3Eh) and AWB_QW_L

(address 3Fh) AWB is made active so that white

balance control data are less than the data of

AWB_IW_S and AWB_QW_S.

When the data are greater than AWB_IW_L and

AWB_QW_L, AWB will be active again.

White balance data come from the following

equation using averaged I and Q data of 16 areas

in one image.

White balance data =

{Weighted data 3 q x (64 – CW_IQ (address 33h))

+ weighted data 4 w x CW_IQ}/64

Y11

Y12

Y13

Y14

Y15

Y16

Y17

Y18

Y21

Y22

Y23

Y24

Y25

Y26

Y27

Y28

Y31

Y32

Y33

Y34

Y35

Y36

Y37

Y38

Y41

Y42

Y43

Y44

Y45

Y46

Y47

Y48

Y51

Y52

Y53

Y54

Y55

Y56

Y57

Y58

Y61

Y62

Y63

Y64

Y65

Y66

Y67

Y68

Y71

Y72

Y73

Y74

Y75

Y76

Y77

Y78

Y81

Y82

Y83

Y84

Y85

Y86

Y87

Y88

I11

I12

I13

I14

I21

I22

I23

I24

I31

I32

I33

I34

I41

I42

I43

I44

Q11

Q12

Q13

Q14

Q21

Q22

Q23

Q24

Q31

Q32

Q33

Q34

Q41

Q42

Q43

Q44

LR38603 Datasheet(PDF) 21 Page - Sharp Corporation

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