US4714921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display panel and method of driving the same
Assignee: Canon Inc
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Filing: 1986-01-29
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Granted: 1987-12-22
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Expires: 2006-01-29
Abstract
Abstract A liquid crystal display panel comprising: a liquid crystal display section; an array section of switching elements connected to first information signal lines of the liquid crystal display section, respectively; a driving circuit section which divides the switching element array section into a plurality of blocks and time-sharingly drives these blocks on a block unit basis; second information signal lines of wirings as many as the number of switching elements of one block among those blocks being connected to the driving circuit section; an information signal output circuit for applying an information signal to the second information signal lines; and an arithmetic operating circuit for correcting the information signal which is applied to the second information signal line in the previous block near the next block between the previous block which is previously driven and the next block which is driven next when the panel is time-sharingly driven for every block to an information signal to eliminate a high luminance which is produced in the first information signal line connected to this second information signal line.
Inventors
- 👤 Hideo Kanno
- 👤 Shinichi Yamashita
- 👤 Masahiko Enari
- 👤 Mitsutoshi Kuno
- 👤 Atsushi Mizutome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:18
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/2007; G09G3/2011; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3685; G09G3/3688; G09G2310/00; G09G2310/02; G09G2310/0264; G09G2310/027; G09G2310/0297; G09G2320/00; G09G2320/02; G09G2320/0209
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
178 words
A liquid crystal panel comprising: a liquid crystal element section; an array section of switching elements connected to first information signal lines of said liquid crystal element section, respectively; a driving circuit section which divides said array section of said switching elements into a plurality of blocks and time-sharingly drives said blocks on a block unit basis; second information signal lines of wirings as many as the number of said switching elements of one block among said blocks being connected to said driving circuit section; an information signal output circuit for applying an information signal to said second information signal lines; and an arithmetic operating circuit for correcting the information signal, which is applied to said second information signal line in the previous block near the next block between the previous block which is previously driven and the next block which is driven next when said panel is time-sharingly driven for every block, to an information signal to eliminate a high luminance which is generated in said first information signal line connected to said second information signal line.
Claim 2
Dependent Claim
178 words
A liquid crystal panel comprising: a liquid crystal element section; an array section of switching elements connected to first information signal lines of said liquid crystal element section, respectively; a driving circuit section which divides said array section of said switching elements into a plurality of blocks and time-sharingly drives said blocks on a block unit basis; second information signal lines of wirings as many as the number of said switching elements of one block among said blocks being connected to said driving circuit section; an information signal output circuit for applying an information signal to said second information signal lines; and an arithmetic operating circuit for correcting the information signal, which is applied to said second information signal line in the previous block near the next block between the previous block which is previously driven and the next block which is driven next when said panel is time-sharingly driven for every block, to an information signal to eliminate a high luminance which is generated in said first information signal line connected to said second information signal line.
Claim 3
Dependent Claim
51 words
A liquid crystal panel according to claim 1, wherein said switching elements consist of transistors, said respective transistors are divided into a plurality of blocks, gates of the transistors in each block are commonly wired, and sources of the transistors in each block are connected to said second information signal lines.
Claim 4
Dependent Claim
15 words
A liquid crystal panel according to claim 2, wherein said transistors include thin film transistors.
Claim 5
Dependent Claim
21 words
A liquid crystal panel according to claim 1, wherein said liquid crystal element includes a device using a ferroelectric liquid crystal.
Claim 6
Dependent Claim
36 words
A liquid crystal panel according to claim 1, wherein said liquid crystal element includes a liquid crystal element using an active matrix to drive a twisted nematic liquid crystal by a switching transistor for every pixel.
Claim 7
Dependent Claim
173 words
A display panel comprising: a display section; an array section of switching elements connected to first information signal lines of said display section, respectively; a driving circuit section which divides said array section of said switching elements into a plurality of blocks and time-sharingly drives said blocks on a block unit basis; second information signal lines of wirings as many as the number of said switching elements of one block among said blocks being connected to said driving circuit section; an information signal output circuit for applying an information signal to said second information signal lines; and an arithmetic operating circuit for correcting the information signal, which is applied to said second information signal line in the previous block near the next block between the previous block which is previously driven and the next block which is driven next when said panel is time-sharingly driven for every block, to an information signal to eliminate a high luminance which is produced in said first information signal line connected to said second information signal line.
Claim 8
Dependent Claim
173 words
A display panel comprising: a display section; an array section of switching elements connected to first information signal lines of said display section, respectively; a driving circuit section which divides said array section of said switching elements into a plurality of blocks and time-sharingly drives said blocks on a block unit basis; second information signal lines of wirings as many as the number of said switching elements of one block among said blocks being connected to said driving circuit section; an information signal output circuit for applying an information signal to said second information signal lines; and an arithmetic operating circuit for correcting the information signal, which is applied to said second information signal line in the previous block near the next block between the previous block which is previously driven and the next block which is driven next when said panel is time-sharingly driven for every block, to an information signal to eliminate a high luminance which is produced in said first information signal line connected to said second information signal line.
Claim 9
Dependent Claim
50 words
A display panel according to claim 6, wherein said switching elements consist of transistors, said respective transistors are divided into a plurality of blocks, gates of the transistors in each block are commonly wired, and sources of the transistors in each block are connected to said second information signal lines.
Claim 10
Dependent Claim
14 words
A display panel according to claim 7, wherein said transistors include thin film transistors.
Claim 11
Dependent Claim
113 words
A liquid crystal display panel comprising: a liquid crystal display section; an array of switching elements for sampling/holding which are arranged on the side of video signal lines of said liquid crystal display section by a quantity as many as the number of said video signal lines; an active matrix circuit which divides said switching element array into a plurality of blocks and time-sharingly drives said blocks; an external video signal output circuit of output lines as many as the number of signal lines of one block of said switching element array; and an arithmetic operating circuit for eliminating a high luminance line for every block which is produced in a video image.
Claim 12
Dependent Claim
113 words
A liquid crystal display panel comprising: a liquid crystal display section; an array of switching elements for sampling/holding which are arranged on the side of video signal lines of said liquid crystal display section by a quantity as many as the number of said video signal lines; an active matrix circuit which divides said switching element array into a plurality of blocks and time-sharingly drives said blocks; an external video signal output circuit of output lines as many as the number of signal lines of one block of said switching element array; and an arithmetic operating circuit for eliminating a high luminance line for every block which is produced in a video image.
Claim 13
Dependent Claim
52 words
A liquid crystal display panel according to claim 9, wherein said switching elements consist of transistors, said respective transistors are divided into a plurality of blocks, gates of the transistors in each block are commonly wired, and sources of the transistors in each block are connected to said second information signal lines.
Claim 14
Dependent Claim
16 words
A liquid crystal display panel according to claim 10, wherein said transistors include thin film transistors.
Claim 15
Dependent Claim
24 words
A liquid crystal display panel according to claim 9, wherein said liquid crystal display element includes a display device using a ferroelectric liquid crystal.
Claim 16
Dependent Claim
39 words
A liquid crystal display panel according to claim 9, wherein said liquid crystal display element includes a liquid crystal display element using an active matrix to drive a twisted nematic liquid crystal by a switching transistor for every pixel.
Claim 17
Independent Claim
163 words
A method of driving a liquid crystal display panel using: a liquid crystal display unit; an array of switching elements for sampling/holding which are arranged on the side of video signal lines of said liquid crystal display unit by a quantity as many as the number of said video signal lines; an active matrix circuit which divides said switching element array into a plurality of blocks and time-sharingly drives said blocks; and an external video signal output circuit of output lines as many as the number of signal lines of one block of said switching element array, wherein, when said liquid crystal display panel is driven in an alternating current manner at an inversion period of one horizontal period of said liquid crystal display panel, a video signal which was subjected to an arithmetic operating process to eliminate a high luminance line produced in a video image for every block is output to said signal lines from said external video signal output circuit.
Claim 18
Independent Claim
163 words
A method of driving a liquid crystal display panel using: a liquid crystal display unit; an array of switching elements for sampling/holding which are arranged on the side of video signal lines of said liquid crystal display unit by a quantity as many as the number of said video signal lines; an active matrix circuit which divides said switching element array into a plurality of blocks and time-sharingly drives said blocks; and an external video signal output circuit of output lines as many as the number of signal lines of one block of said switching element array, wherein, when said liquid crystal display panel is driven in an alternating current manner at an inversion period of one horizontal period of said liquid crystal display panel, a video signal which was subjected to an arithmetic operating process to eliminate a high luminance line produced in a video image for every block is output to said signal lines from said external video signal output circuit.
Claim 19
Dependent Claim
50 words
A driving method according to claim 14, wherein said switching elements consist of transistors, said respective transistors are divided into a plurality of blocks, gates of the transistors in each block are commonly wired, and sources of the transistors in each block are connected to said second information signal lines.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |