AN.No.G191C-090E
i
NOTICE
This manual describes the technical information, the function, and the operation of
the G191C Liquid Crystal Display Module of Seiko Instruments Inc. Please read
this manual carefully to familiarize yourself with the functions and to make best
use of them.
The descriptions here are subject to change without notice.
Revision Record
Edition
Revision
Date
1
Original
September 1990
Seiko Instruments Inc. 1990
Printed in Japan
AN.No.G191C-090E
ii
CONTENTS
1. SPECIFICATIONS
1.1 General................................................................................................................. 1
1.2 Features ............................................................................................................... 1
1.3 Absolute Maximum Ratings ................................................................................ 1
1.4 Electrical Characteristics (Excluding EL Backlight) ......................................... 1
1.5 Optical Characteristics ........................................................................................ 2
1.6 EL Backlight Characteristics .............................................................................. 3
1.7 Dimensions .......................................................................................................... 4
2. CIRCUIT STRUCTURE
2.1 Liquid Crystal Driving Circuit ............................................................................ 5
2.2 Circuit Structure ................................................................................................. 7
2.3 Timing Characteristics ...................................................................................... 10
2.4 Interface Circuit ................................................................................................ 12
2.5 Suitable Inverter SKI-050-05H ......................................................................... 16
3. NOTES ...................................................................................................................... 17
INDEX
AN.No.G191C-090E
1
1. SPECIFICATIONS
1.1
General
The G191C is a thin liquid crystal display (LCD) module that consists of a full dot-matrix LCD
panel, CMOS LSIs and EL backlight. The panel features a wide viewing angle and high
contrast. The full dot-matrix structure allows both graphics and character display. In
addition, the display is clear and stable, with no image warping or position skew, because the
display position is specified by the intersection of transparent electrodes in a matrix.
1.2
Features
Full dot-matrix structure with 192 dots
128 dots
1 / 128 duty
FSTN LCD : black and white display using RCF (Retardation Control Film)
Transflective LCD, anti-glare, 6 oclock viewing angle
Built-in EL backlight
Positive type
display data H (display ON) : black, display data L (display OFF) : white
Four-bit parallel date input
Two power supplies : V
DD
= 5V, V
LC
= -5V to -20V (for driving liquid crystal)
Weight : Approx. 100 g
1.3
Absolute Maximum Ratings
1.4
Electrical Characteristics (Excluding EL Backlight)
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AN.No.G191C-090E
2
1.5
Optical Characteristics
Note 1 : Definition of angles
and
Note 2 : Definition of viewing angles
1 and
2
Note 3 : Definition of contrast C
Note 4 : Definition of response time
V
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