Epson S1F76680 Technical Manual page 14

7. OPERATIONAL AND FUNCTIONAL DESCRIPTION
[3] Selection of the change time of the automatic luminance control current
S1F76680 judges brightness at every sampling cycle and then automatically changes LED current so that it
may correspond to the brightness.
When the automatic luminescence control is turned on, LED current value changes in a unit of 1/127 of
ILEDmax.
You can set the current change time from the 1AH at an address (to be described later) of I
Independent setup is available for the increased current (TUP) and decreased current (TDW).
Waveform of LED current changes in the automatic luminescence control
ILED
Current change time selection register used in the automatic luminescence control
Current change time setting table
10
Downloaded from Elcodis.com electronic components distributor
ILED Max. × 1/127
TUP
Address Item
D7
Register
TDW3
name
1AH
R/W R/W
Initial value 0
Change time 4-bit register setting
State of
TDW3 TDW2
selection
TUP3 TUP2
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 1
9 1
10 1
11 1
12 1
13 1
14 1
15 1
Register
TDW setting register
D6 D5 D4
TDW2 TDW1 TDW0
R/W R/W R/W
1 1 1
TDW1 TDW0
TUP1 TUP0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
EPSON
TDW
TUP setting register
D3 D2 D1 D0
TUP3 TUP2 TUP1 TUP0
R/W R/W R/W R/W
0 1 0 1
Change time (Unit)
0.32 msec
0.64 msec
1.28 msec
2.56 msec
5.12 msec
10.24 msec TUP initial value
20.48 msec
40.96 msec TDW initial value
81.92 msec
163.84 msec
327.68 msec
655.36 msec
1.31 sec
2.62 sec
5.24 sec
10.48 sec
S1F76680 Technical Manual (Rev.1.22)
2
C-Bus.
Remarks
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Remarks