US4825201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device with panels compared to form correction signals
Assignee: Mitsubishi Electric Corp
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Filing: 1986-09-24
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Granted: 1989-04-25
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Expires: 2006-09-24
Abstract
Abstract A display device having a number of display panels arranged in a plane to constitute a large picture image screen includes a correction-value determining means positioned in front of and apart from the display panels to observe the optical condition of the display panels so as to determine a part to be corrected in the display panels and a value to be corrected for the part, a correction signal generating means for generating a correction signal on the basis of the corrected value which is provided from the correction value determining means, correction circuits for the display panels, and a recorrection signal generating means which receives the correction signal from the correction signal generating means and transmits a recorrection signal to the correction circuit for one or more number of the display panels to be corrected.
Inventors
- 👤 Kazuhiro Watanabe
- 👤 Makoto Ota
- 👤 Toshiharu Imamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:42
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G06; G06F; G06F3/00; G06F3/14; G06F3/147; G09G2300/00; G09G2300/02; G09G2300/026; G09G2320/00; G09G2320/06; G09G2320/0626; G09G2320/0666; G09G2320/0693; G09G2360/00; G09G2360/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
A display device comprising a number of display panels arranged in a plane to constitute a large picture image screen, which comprises a correction signal generating means, including means for determining at least one of said display panels to be corrected, for generating a correction signal in response to a comparison of the optical condition of the panel to be corrected in said display panels with the optical condition of at least some other display panels so that the optical condition of the corrected display panel is the same as the other ones, correction circuits for said display panels, and a recorrection signal generating means which receives said correction signal from said correction signal generating means and transmits a recorrection signal to the correction circuit for one or more number of said display panels to be corrected.
Claim 2
Dependent Claim
137 words
A display device comprising a number of display panels arranged in a plane to constitute a large picture image screen, which comprises a correction signal generating means, including means for determining at least one of said display panels to be corrected, for generating a correction signal in response to a comparison of the optical condition of the panel to be corrected in said display panels with the optical condition of at least some other display panels so that the optical condition of the corrected display panel is the same as the other ones, correction circuits for said display panels, and a recorrection signal generating means which receives said correction signal from said correction signal generating means and transmits a recorrection signal to the correction circuit for one or more number of said display panels to be corrected.
Claim 3
Dependent Claim
51 words
The display device according to claim 1, wherein said correction signal generating means is provided with an indicator for specifying one or more number of said display panels requiring correction among said number of display panels arranged in a matrix form, and an adjusting member for determining a value for correction.
Claim 4
Dependent Claim
44 words
The display device according to claim 2, wherein said indicator is constituted by a keyboard having a plurality of keys arranged in the matrix form having vertical and transverse lines and a display element capable of indicating a display panel by operating said keyboard.
Claim 5
Dependent Claim
37 words
The display device according to claim 1, wherein said correction signal generating means determines a part to be corrected in said display panels and a corrected value for the part in association with an optical measuring device.
Claim 6
Dependent Claim
18 words
The display device according to claim 1, wherein a liquid crystal panel is used for said display panel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |