JPS51127694A - Penetration plate for electric light indication board - Google Patents
Penetration plate for electric light indication boardInfo
- Publication number
- JPS51127694A JPS51127694A JP50051856A JP5185675A JPS51127694A JP S51127694 A JPS51127694 A JP S51127694A JP 50051856 A JP50051856 A JP 50051856A JP 5185675 A JP5185675 A JP 5185675A JP S51127694 A JPS51127694 A JP S51127694A
- Authority
- JP
- Japan
- Prior art keywords
- electric light
- penetration plate
- light indication
- indication board
- sharpness
- 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
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
PURPOSE: To obtain a penetration plate for use of electric light indicator board which is capable of maintaining the sharpness of a faint luminous image and also magnifying the luminous image. This penetration plate is also effective to prevent lowering of luminous image sharpness of various electric light-indicator boards, The image sharpness decreases due to dispersion light in the daylight outdoors or in a very bright room.
COPYRIGHT: (C)1976,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50051856A JPS51127694A (en) | 1975-04-28 | 1975-04-28 | Penetration plate for electric light indication board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50051856A JPS51127694A (en) | 1975-04-28 | 1975-04-28 | Penetration plate for electric light indication board |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS51127694A true JPS51127694A (en) | 1976-11-06 |
Family
ID=12898492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50051856A Pending JPS51127694A (en) | 1975-04-28 | 1975-04-28 | Penetration plate for electric light indication board |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS51127694A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59216185A (en) * | 1983-05-25 | 1984-12-06 | 株式会社日立製作所 | Panel for display |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2398799A (en) * | 1940-07-19 | 1946-04-23 | Frederick R Miller | Light screen |
-
1975
- 1975-04-28 JP JP50051856A patent/JPS51127694A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2398799A (en) * | 1940-07-19 | 1946-04-23 | Frederick R Miller | Light screen |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59216185A (en) * | 1983-05-25 | 1984-12-06 | 株式会社日立製作所 | Panel for display |
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