JPS54112187A - Luminous semiconductor device - Google Patents
Luminous semiconductor deviceInfo
- Publication number
- JPS54112187A JPS54112187A JP2008878A JP2008878A JPS54112187A JP S54112187 A JPS54112187 A JP S54112187A JP 2008878 A JP2008878 A JP 2008878A JP 2008878 A JP2008878 A JP 2008878A JP S54112187 A JPS54112187 A JP S54112187A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- luminous
- brightness
- areas
- digit
- 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)
Abstract
PURPOSE: To eliminate a brightness difference as to a luminous semiconductor wafer which has several luminous parts isolated electrically, by equalizing the area of the PN junction of each luminous part even if areas between respective luminous parts to be displayed are different and by obtaining the desired display area by covering it with an opaque film.
CONSTITUTION: As for the display element displaying two-digit and one-digit numeral and mark T, the slanting-line parts are luminous display parts, and dotted parts have PN junctions. Further, each digit is composed of seven light-emission diodes 1 to 7 or 1' to 7'; both digits have a common cathode and segments equivalent each other between both digits are connected via the same donductors. In this constitution, segment whose luminous part areas are equal have equal brightness by dynamic driving, but the variance of brightness occures if areas are different like 7 and 7'. For the purpose, PN junction areas are made equal and then, unneeded parts are covered with Al films, so that a difference in brightness will be prevented from occurring even when segments are driven by the same current.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008878A JPS54112187A (en) | 1978-02-22 | 1978-02-22 | Luminous semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008878A JPS54112187A (en) | 1978-02-22 | 1978-02-22 | Luminous semiconductor device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54112187A true JPS54112187A (en) | 1979-09-01 |
Family
ID=12017342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008878A Pending JPS54112187A (en) | 1978-02-22 | 1978-02-22 | Luminous semiconductor device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54112187A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5483085A (en) * | 1994-05-09 | 1996-01-09 | Motorola, Inc. | Electro-optic integrated circuit with diode decoder |
-
1978
- 1978-02-22 JP JP2008878A patent/JPS54112187A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5483085A (en) * | 1994-05-09 | 1996-01-09 | Motorola, Inc. | Electro-optic integrated circuit with diode decoder |
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