S1F76680 Epson Electronics America, Inc., S1F76680 Datasheet - Page 19

• Manufacturer Part Number: S1F76680
• Description: Led Driver
• Manufacturer: Epson Electronics America, Inc.

set by setting 7-bit value, from D0 (LSB) to D6 (MSB), to each address.
set to respective address.
20mA, which means LED is driven at maximum current.
which means LED goes off.
S1F76680 Technical Manual (Rev.1.22)
* Note, however, that SLED (0 to 3) are not lighted but they are turned off.
* When variations in luminescence result from the minute LED lighting current setting (SLED being set to
Next, determine the LED current values at respective brightness levels.
Set the current values to the following addresses with I
It is possible to set 128 gradations (SLED), from 0 to 127, for the LED current value and SLED (0 to 127) is
D7 is a dummy.
When automatic luminance control is activated, LED drive current changes gradually between current values
This gradual change of the current value realizes the comfortable display during automatic luminance control.
The current value can be obtained from the following formula:
Note that setting SLED (0 to 3) lights off LED.
When ILEDmax=20mA
If (D7,D6,D5,D4,D3,D2,D1,D0)=(X,1,1,1,1,1,1,1) is input, SLED=127, therefore, ILED=20mA × 127/127 =
If (D7,D6,D5,D4,D3,D2,D1,D0)=(X,0,0,0,0,0,0,0) is input, SLED=0, therefore, ILED=20mA × 0/127=0mA,
If LED setting address is not newly set, SLED will be operated at register default value.
small), you can specify to increase the LED current value.
ILED(mA)=ILEDmax × SLED / 127
Brightness 10
Brightness 11
Brightness 12
Brightness 13
Brightness 14
Brightness 15
Brightness 16
Brightness 1
Brightness 2
Brightness 3
Brightness 4
Brightness 5
Brightness 6
Brightness 7
Brightness 8
Brightness 9
Brightness
(high sensor current)
(low sensor current)
Bright
Dark
7. OPERATIONAL AND FUNCTIONAL DESCRIPTION
EPSON
2
C-Bus, which will be explained later.
LED current setting
address
0CH
0DH
0AH
0BH
0EH
0FH
02H
03H
04H
05H
06H
07H
08H
09H
10H
11H
Register default value
100
108
127
127
127
125
119
105
13
18
38
42
52
62
68
85
15