Epson S1F76680 Technical Manual page 17

[6] Constant setting
Ambient luminance evaluated by a luminance sensor and sensor current IPD typically shows the following
inclination.
S1F76680 evaluates ambient brightness using value of sensor's VPD on the scale of 1 to 16.
The following table shows relation between VPD and brightness.
S1F76680 Technical Manual (Rev.1.22)
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7. OPERATIONAL AND FUNCTIONAL DESCRIPTION
Ambient luminance - Sensor current IPD
10 100
Ambient luminance [lx] log
VPD(V)
VPD1=0.003
VPD2=0.004
VPD3=0.006
VPD4=0.010
VPD5=0.016
VPD6=0.026
VPD7=0.040
VPD8=0.063
VPD9=0.079
VPD10=0.126
VPD11=0.173
VPD12=0.299
VPD13=0.472
VPD14=0.787
VPD15=1.197
VPDn : Threshold of brigtness n and brightness n+1
1000
Brightness
Brightness 1
Brightness 2
(low sensor current)
Brightness 3
Brightness 4
Brightness 5
Brightness 6
Brightness 7
Brightness 8
Brightness 9
Brightness 10
Brightness 11
Brightness 12
Brightness 13
Brightness 14
Brightness 15
(high sensor current)
Brightness 16
EPSON
10000
Dark
Bright
13