JPS5571926A - Inspection of liquid crystal indicator - Google Patents
Inspection of liquid crystal indicatorInfo
- Publication number
- JPS5571926A JPS5571926A JP14418378A JP14418378A JPS5571926A JP S5571926 A JPS5571926 A JP S5571926A JP 14418378 A JP14418378 A JP 14418378A JP 14418378 A JP14418378 A JP 14418378A JP S5571926 A JPS5571926 A JP S5571926A
- Authority
- JP
- Japan
- Prior art keywords
- segment
- liquid crystal
- inspection
- crystal indicator
- reference level
- 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.)
- Pending
Links
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
PURPOSE: To attain the automatic inspection method without recourse to viewing and to decide the accuracy of actuation of the liquid crystal indicator with less brightness by applying and scanning a light beam to the indicator and by discriminating the presence of reflected rays with a fixed luminous intensity or more.
CONSTITUTION: When each segment of the indicator 4 is scanned by the beam 2 sent from the light source 1, the beam is reflected with the intensity of a reference level or more only when it crosses a segment that is in the state of display, the reflected rays that passed through the half mirror 6 are photoelectrically converted by the sensor 7, and are compared with a reference level by the decision circuit 9. Since reflected rays from a segment being in the state of other display or from a bad segment with less brightness have the intensity less than a reference level, an inspection without viewing is possible, the inspection process can be automatized to decide the accuracy of actuation of the liquid crystal indicator.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14418378A JPS5571926A (en) | 1978-11-24 | 1978-11-24 | Inspection of liquid crystal indicator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14418378A JPS5571926A (en) | 1978-11-24 | 1978-11-24 | Inspection of liquid crystal indicator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5571926A true JPS5571926A (en) | 1980-05-30 |
Family
ID=15356119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14418378A Pending JPS5571926A (en) | 1978-11-24 | 1978-11-24 | Inspection of liquid crystal indicator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5571926A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62131294A (en) * | 1985-12-03 | 1987-06-13 | 日本電気株式会社 | Display inspector |
-
1978
- 1978-11-24 JP JP14418378A patent/JPS5571926A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62131294A (en) * | 1985-12-03 | 1987-06-13 | 日本電気株式会社 | Display inspector |
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