US Patent No: 4,760,389
Number of patents in Portfolio can not be more than 2000
Transmitting type display device
Stats
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Jul 26, 1988
Issued date -
Nov 20, 1986
filing date -
06/932,839
serial no -
Expired
status
Importance
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Abstract
A transmitting type display device is disclosed, which comprises a transmitting type display panel to provide a display on the front surface, a light source for producing light illuminating the back surface of the transmitting type display and a brightness controller for controlling the intensity of light from the light source. The device comprises an ambient light detector disposed near the transmitting type display panel for detecting the intensity of ambient light incident on the display surface of the transmitting type display panel, and the brightness controller for controlling the light source according to the detection output of the ambient light detector such that the intensity of light from the light source to the transmitting type display panel is increased with an increase of the detected light intensity.
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First Claim
Related Publications
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International Classification(s)
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,254,408 Case for luminous display with ambient light conduit assembly | 4 | 1979 | |
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| 4,311,996 Hand held type electronic calculators | 6 | 1976 | |
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| 4,644,338 Dot-matrix liquid crystal display | 61 | 1983 | |
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| 4,319,237 Brightness adjusting circuit of liquid crystal matrix panel for picture display | 52 | 1980 | |
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| 4,502,761 Gradient-free illumination of passive readout display devices | 9 | 1982 | |
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| 4,289,383 Lighted dot matrix display | 19 | 1979 | |
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| 4,294,524 Image or picture projecting system using electronically controlled slides | 60 | 1980 | |