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UPD16640C 데이터시트(PDF) 5 Page - NEC

부품명 UPD16640C
상세설명  300/309-OUTPUT TFT-LCD SOURCE DRIVER 64 GRAY SCALE
PDF  16 Pages
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제조업체  NEC [NEC]
홈페이지  http://www.nec.com/
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UPD16640C 데이터시트(HTML) 5 Page - NEC

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Data Sheet S11269EJ1V1DS00
5
µµµµ PD16640C
4. RELATION BETWEEN INPUT DATA AND OUTPUT VOLTAGE VALUE
The 11 major points on the
γ-characteristic curve of the LCD panel are arbitrarily set by external power supplies V0
through V10. If the display data is 00H or 3FH, gray scale voltage V0 or V10 is output. If the display data is in the
range 01H to 3EH, the high-order 3 bits select an external powers pair Vn+1, Vn. The low-order 3 bits evenly divide
the range of Vn+1, Vn into eight segments by means of D/A conversion (however, the ranges from V9 to V8 and from V2
to V1 are divided into seven segments) to output a 64-grayscale voltage.
DX5
(MSB)
DX4
DX3
DX2
DX1
DX0
(LSB)
DX5
DX4
DX3
Vn+1-Vn
00
0
V1-V2
00
1
V2-V3
01
0
V3-V4
01
1
V4-V5
10
0
V5-V6
10
1
V6-V7
11
0
V7-V8
11
1
V8-V9
Vn
Vn+1
000
1
001
2
010
3
011
4
100
5
101
6
110
7
111
8
DX2-DX0
High-order 3 bits :
γ-corrected power selected
(Vn+1-Vn)
Low-order 3 bits : 3-bit D/A
(range Vn-Vn+1 is divided into 7 or 8 segments)
Figure 4-1. Relation between Input Data and
γγγγ -corrected Voltage
0.1 V
0.1 V
V1
V2
V3
V4
V5
V6
V7
V8
V9
07
F
17
1F
Input data (HEX)
27
2F
37
3F
VDD2
V0
VSS2
V10
gray scale supply specified
by 00H
7 segments
8 segments
8 segments
8 segments
8 segments
8 segments
8 segments
7 segments
gray scale supply specified
by 3FH



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