JPS5443763A - Liquid crystal display mechanism - Google Patents
Liquid crystal display mechanismInfo
- Publication number
- JPS5443763A JPS5443763A JP11076477A JP11076477A JPS5443763A JP S5443763 A JPS5443763 A JP S5443763A JP 11076477 A JP11076477 A JP 11076477A JP 11076477 A JP11076477 A JP 11076477A JP S5443763 A JPS5443763 A JP S5443763A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- transistors
- temperature
- drive pulses
- liquid crystal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
PURPOSE: To improve the display performance and to simplify the electrode terminal shape by controlling the drive pulses such that the effective value corresponds to the variation in the temperature and a main voltage while leaving the wave heiht invaried.
CONSTITUTION: A temperature detector 1 is equipped with a reference main power source composed of transistors 10 to 13 and 14 to 17 so as to generate a reference voltage VS1 having no temperature dependency, a main voltage and a reference voltage VS2 having reproducibility in accordance with the conductance ratio of transistors 14 and 15 by means of the transistors 10 and 11 having the same conductance. These voltage VS1 and VS2 are compared by an operational amplifier 37 and are fed to a drive control circuit 3 through a pulse width control circuit 2 which is composed of a shift resistor 41, a decoder and a gate circuit. Then, the duty cycle of the drive pulses is varied so as to generate the drive pulses having their effective value varied, while leaving the peak level constant, in accordance with the changes in the temperature and main voltage thereby to improve the liquid crystal display performance. According to the above construction, the circuit can be integrated moncyclically to simplify the electrode shape.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11076477A JPS5443763A (en) | 1977-09-13 | 1977-09-13 | Liquid crystal display mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11076477A JPS5443763A (en) | 1977-09-13 | 1977-09-13 | Liquid crystal display mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5443763A true JPS5443763A (en) | 1979-04-06 |
JPS6127726B2 JPS6127726B2 (en) | 1986-06-26 |
Family
ID=14543970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11076477A Granted JPS5443763A (en) | 1977-09-13 | 1977-09-13 | Liquid crystal display mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5443763A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57126735A (en) * | 1981-01-23 | 1982-08-06 | Shin Meiwa Ind Co Ltd | Packing box drop prevention unit for dump truck or the like |
JPS61278892A (en) * | 1985-06-04 | 1986-12-09 | セイコーエプソン株式会社 | Driving of dot matrix type liquid crystal display |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51128296A (en) * | 1975-05-01 | 1976-11-09 | Seiko Instr & Electronics Ltd | Indicator |
JPS51144527A (en) * | 1975-06-06 | 1976-12-11 | Seiko Instr & Electronics Ltd | Display device |
-
1977
- 1977-09-13 JP JP11076477A patent/JPS5443763A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51128296A (en) * | 1975-05-01 | 1976-11-09 | Seiko Instr & Electronics Ltd | Indicator |
JPS51144527A (en) * | 1975-06-06 | 1976-12-11 | Seiko Instr & Electronics Ltd | Display device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57126735A (en) * | 1981-01-23 | 1982-08-06 | Shin Meiwa Ind Co Ltd | Packing box drop prevention unit for dump truck or the like |
JPS61278892A (en) * | 1985-06-04 | 1986-12-09 | セイコーエプソン株式会社 | Driving of dot matrix type liquid crystal display |
Also Published As
Publication number | Publication date |
---|---|
JPS6127726B2 (en) | 1986-06-26 |
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