JPS6476026A - Optical display device - Google Patents
Optical display deviceInfo
- Publication number
- JPS6476026A JPS6476026A JP23288287A JP23288287A JPS6476026A JP S6476026 A JPS6476026 A JP S6476026A JP 23288287 A JP23288287 A JP 23288287A JP 23288287 A JP23288287 A JP 23288287A JP S6476026 A JPS6476026 A JP S6476026A
- Authority
- JP
- Japan
- Prior art keywords
- area
- display
- grating period
- pattern
- contrast
- 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
- Liquid Crystal (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
Abstract
PURPOSE:To obtain an optical display device having high contrast and a high display quality by constituting a display pattern by a first area whose grating period is P1 and a second area whose grating period is P2 (P1<P2). CONSTITUTION:A display pattern is constituted of two areas whose grating periods are different, consisting of an (a) are whose grating period Pa is about 2mum and a (b) area whose grating period Pb is about 4mum and which satisfied a relation of Pa<Pb. As for the (a) area provided on the outside peripheral part of the pattern, its grating period is small, therefore, as for the display of this area, its contrast becomes higher, but due to the influence of a low-order diffracted light, the display quality drops to some extent. On the other hand, as for the (b) area of the inside of the pattern, its grating period is made larger than that of the area (a), therefore, the contrast of the display becomes lower to some extent, but a shift quantity of a virtual image generated by a partial low-order (+ or - primary) diffracted light and an image of an object to be photographed is small, and the display quality is improved. In such a way, the contrast becomes higher on an average as a whole, and the display quality is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23288287A JPS6476026A (en) | 1987-09-17 | 1987-09-17 | Optical display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23288287A JPS6476026A (en) | 1987-09-17 | 1987-09-17 | Optical display device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6476026A true JPS6476026A (en) | 1989-03-22 |
Family
ID=16946317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23288287A Pending JPS6476026A (en) | 1987-09-17 | 1987-09-17 | Optical display device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6476026A (en) |
-
1987
- 1987-09-17 JP JP23288287A patent/JPS6476026A/en active Pending
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