CA2110532A1 - Liquid-Crystal Display Unit for Electronic Display - Google Patents
Liquid-Crystal Display Unit for Electronic DisplayInfo
- Publication number
- CA2110532A1 CA2110532A1 CA 2110532 CA2110532A CA2110532A1 CA 2110532 A1 CA2110532 A1 CA 2110532A1 CA 2110532 CA2110532 CA 2110532 CA 2110532 A CA2110532 A CA 2110532A CA 2110532 A1 CA2110532 A1 CA 2110532A1
- Authority
- CA
- Canada
- Prior art keywords
- window
- display
- liquid
- hood
- crystal display
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title abstract 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000004313 glare Effects 0.000 abstract 1
- 229920000515 polycarbonate Polymers 0.000 abstract 1
- 239000004417 polycarbonate Substances 0.000 abstract 1
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
LIQUID-CRYSTAL DISPLAY UNIT FOR ELECTRONIC DIRECTORY
ABSTRACT OF THE DISCLOSURE
A liquid-crystal display, preferably eighteen lines of forty characters each, is mounted in a case. The temperature of the display medium is held within operating limits for the display -- notwithstanding ambient temperature and humidity variations over generally normal ranges for at least the tem-perate zones, and even if the display unit receives direct sunlight. The unit works outdoors, at temperatures to at least 46 °C (115 °F) as well as in buildings with no temperature control. This is accomplished by use of a shading hood, and a window (preferably unperforated polycarbonate, curved, upward-and-outward-concave, and cylindrical-segment) that reflects to a viewer only light from the hood underside. No ventilating fan, plenum or other ventilating opening is needed. A circuit-board-mounted temperature sensor controls the contrast-adjust-ing voltage of the display -- using data in a digital-memory "look up" table. A heater is preferably provided, also temper-ature-controlled. The entire unit can be flush-mounted in a wall without disrupting operation. Visible glare arising in reflection at the window is reduced by the hood-and-window combination, without need for any antireflection coating on the window.
ABSTRACT OF THE DISCLOSURE
A liquid-crystal display, preferably eighteen lines of forty characters each, is mounted in a case. The temperature of the display medium is held within operating limits for the display -- notwithstanding ambient temperature and humidity variations over generally normal ranges for at least the tem-perate zones, and even if the display unit receives direct sunlight. The unit works outdoors, at temperatures to at least 46 °C (115 °F) as well as in buildings with no temperature control. This is accomplished by use of a shading hood, and a window (preferably unperforated polycarbonate, curved, upward-and-outward-concave, and cylindrical-segment) that reflects to a viewer only light from the hood underside. No ventilating fan, plenum or other ventilating opening is needed. A circuit-board-mounted temperature sensor controls the contrast-adjust-ing voltage of the display -- using data in a digital-memory "look up" table. A heater is preferably provided, also temper-ature-controlled. The entire unit can be flush-mounted in a wall without disrupting operation. Visible glare arising in reflection at the window is reduced by the hood-and-window combination, without need for any antireflection coating on the window.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/985,017 US5416495A (en) | 1988-07-07 | 1992-12-03 | Liquid-crystal display unit for electronic directory |
| US07/985,017 | 1992-12-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2110532A1 true CA2110532A1 (en) | 1994-06-04 |
| CA2110532C CA2110532C (en) | 2000-01-11 |
Family
ID=25531111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2110532 Expired - Fee Related CA2110532C (en) | 1992-12-03 | 1993-12-02 | Liquid-crystal display unit for electronic display |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2110532C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117369557A (en) * | 2023-11-29 | 2024-01-09 | 徐州盈胜微半导体有限公司 | Integrated circuit temperature control system and method |
-
1993
- 1993-12-02 CA CA 2110532 patent/CA2110532C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117369557A (en) * | 2023-11-29 | 2024-01-09 | 徐州盈胜微半导体有限公司 | Integrated circuit temperature control system and method |
| CN117369557B (en) * | 2023-11-29 | 2024-05-28 | 徐州盈胜微半导体有限公司 | Integrated circuit temperature control system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2110532C (en) | 2000-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |