EP0328329A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal display device
Assignee: Sharp Corp
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Filing: 1989-02-06
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Granted: —
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Expires: 2009-02-06
Abstract
Abstract A liquid crystal display device comprising a liquid crystal display cell (23) arranged between the first and second polarizers (21, 22) is disclosed. In the liquid crystal display device, the applied voltage between electrodes (25, 27) is controlled by a switching element (24) so as to drive picture elements defined at the crossings between the first and second transparent electrodes (25, 27), and the light incident to at least the rim portion of the first transparent electrode (25) and the switching means (24) is shaded by a shading film (32) formed in the liquid crystal display cell (23).
Inventors
- 👤 Yutaka Takafuji
- 👤 Takashi Inami
- 👤 Hisashi Atarashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 06:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
246 words
A liquid crystal display device comprising: a first polarizer; a second polarizer; first and second transparent insulating substrates arranged in parallel to each other with a predetermined interval; a liquid crystal display cell arranged between said first and second polarizers, said liquid crystal display cell having a liquid crystal layer arranged between said first and second transparent insulating substrates; first transparent electrodes formed on the inner surface of said first transparent insulating substrate; second transparent electrodes formed on the inner surface of said second transparent insulating substrate so as to cross said first transparent electrodes solidly; a switching means for controlling an applied voltage between said first and second transparent electrodes so as to drive picture elements defined at the crossings between said first and second transparent electrodes; a light source arranged on the outer surface of said second polarizer; and a shading means arranged on the second transparent insulating substrate for shading the light incident to at least the rim portion of said first transparent electrode and said switching means; wherein the respective polarization axes of said first and second polarizers are set so that the light emitted from said light source is prevented from transmitting through said second polarizer, said liquid crystal display cell and said first polarizer at the time of the application of a predetermined voltage between said first and second transparent electrodes, and the light therefrom is allowed to transmit therethrough at the time of the application of zero voltage therebetween.
Claim 2
Dependent Claim
246 words
A liquid crystal display device comprising: a first polarizer; a second polarizer; first and second transparent insulating substrates arranged in parallel to each other with a predetermined interval; a liquid crystal display cell arranged between said first and second polarizers, said liquid crystal display cell having a liquid crystal layer arranged between said first and second transparent insulating substrates; first transparent electrodes formed on the inner surface of said first transparent insulating substrate; second transparent electrodes formed on the inner surface of said second transparent insulating substrate so as to cross said first transparent electrodes solidly; a switching means for controlling an applied voltage between said first and second transparent electrodes so as to drive picture elements defined at the crossings between said first and second transparent electrodes; a light source arranged on the outer surface of said second polarizer; and a shading means arranged on the second transparent insulating substrate for shading the light incident to at least the rim portion of said first transparent electrode and said switching means; wherein the respective polarization axes of said first and second polarizers are set so that the light emitted from said light source is prevented from transmitting through said second polarizer, said liquid crystal display cell and said first polarizer at the time of the application of a predetermined voltage between said first and second transparent electrodes, and the light therefrom is allowed to transmit therethrough at the time of the application of zero voltage therebetween.
Claim 3
Dependent Claim
19 words
A liquid crystal display device as claimed in claim 1, wherein said switching means is a Thin Film Transistor.
Claim 4
Dependent Claim
19 words
A liquid crystal display device as claimed in claim 1, wherein said switching means is a non-linear type element.
Claim 5
Dependent Claim
36 words
A liquid crystal display device as claimed in claim 3, wherein the non-linear type element is comprised of two diodes connected in parallel or in series, a Schottky junction element, or a Metal Insulator Metal element.
Claim 6
Dependent Claim
25 words
A liquid crystal display device as claimed in claim 1, wherein said shading means is a metal film made of Cr, Ni, Al, or Ni-Cr.
Claim 7
Dependent Claim
31 words
A liquid crystal display device as claimed in claim 1, wherein said shading means is a gelatin film or an organic high polymer film colored with a dye or a pigment.
Claim 8
Dependent Claim
111 words
A liquid crystal display device comprising a liquid crystal cell arranged selectively to transmit light incident thereon, said cell comprising opposed first and second substrates (26, 28) with a liquid crystal material (29) therebetween, respective first and second transparent electrodes (25, 27) mounted on the inner surfaces of said first and second substrates, respectively, thin film switch means (24) mounted on the first substrate for controlling a voltage applied across said liquid crystal material by said electrodes, and light shading means (32) mounted on the second substrate for shading said thin film switch means from the light, said light being incident on the cell from the side of said second substrate.
Claim 9
Dependent Claim
111 words
A liquid crystal display device comprising a liquid crystal cell arranged selectively to transmit light incident thereon, said cell comprising opposed first and second substrates (26, 28) with a liquid crystal material (29) therebetween, respective first and second transparent electrodes (25, 27) mounted on the inner surfaces of said first and second substrates, respectively, thin film switch means (24) mounted on the first substrate for controlling a voltage applied across said liquid crystal material by said electrodes, and light shading means (32) mounted on the second substrate for shading said thin film switch means from the light, said light being incident on the cell from the side of said second substrate.
References Cited (Backward Citations)
No citation records indexed.
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