Liquid crystal display device having particular sapphire substrates
First Claim
1. A projection-type liquid crystal display device comprising:
- a light source;
a liquid crystal panel, wherein the liquid crystal panel includes a transparent substrate;
a lens; and
a polarizer having a polarizer film and a retaining plate for retaining the polarizer film, wherein at least any one of the lens, the retaining plate and the transparent substrate is comprised of a sapphire substrate, and wherein light from the light source is transmitted through the lens, the polarizer and the liquid crystal panel so as to be projected, and wherein the sapphire substrate is constructed in a manner that an angle made by a C-axis direction or C-axis projection line direction and a polarized light transmission axis is set within a range of ±
2°
, or an angle made by an axis perpendicular to the C-axis and a polarized light transmission axis is set within a range of ±
2°
, or an angle made by a C-plane and a plane vertical to a transmission direction of a polarized light to be transmitted is set within a range of ±
2°
.
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Accused Products
Abstract
The present invention provides a liquid crystal display device, which includes a liquid crystal panel as one of optical components for transmitting, absorbing or reflecting light. At least any one of the optical components is comprised of a sapphire substrate. The optical components further include a lens, and a polarizer having a polarizer film and a retaining plate for retaining the polarizer film, and the liquid crystal panel may include a transparent substrate. In this case, any one of the lens, the retaining plate and transparent substrates is comprised of a sapphire substrate, and thus, it is possible to provide a transmission type liquid crystal display device which transmits light from the light source through the lens, the polarizer and the liquid crystal panel so that light is projected.
48 Citations
20 Claims
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1. A projection-type liquid crystal display device comprising:
-
a light source;
a liquid crystal panel, wherein the liquid crystal panel includes a transparent substrate;
a lens; and
a polarizer having a polarizer film and a retaining plate for retaining the polarizer film, wherein at least any one of the lens, the retaining plate and the transparent substrate is comprised of a sapphire substrate, and wherein light from the light source is transmitted through the lens, the polarizer and the liquid crystal panel so as to be projected, and wherein the sapphire substrate is constructed in a manner that an angle made by a C-axis direction or C-axis projection line direction and a polarized light transmission axis is set within a range of ±
2°
, or an angle made by an axis perpendicular to the C-axis and a polarized light transmission axis is set within a range of ±
2°
, or an angle made by a C-plane and a plane vertical to a transmission direction of a polarized light to be transmitted is set within a range of ±
2°
.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
wherein the sapphire substrate is attached onto an outer surface of the liquid crystal panel so that a space of 0.1 mm or less interposed between the outer surface of the liquid crystal panel and an opposed outer surface of the sapphire substrate is sealed. -
4. A projection-type liquid crystal display device according claim 3, further comprising:
a metallic radiation fin is bonded to the sapphire substrate.
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5. A projection-type liquid crystal display device according claim 3, further comprising:
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a second sapphire substrate facing the first sapphire substrate;
wherein the liquid crystal panel is sandwiched between the first sapphire substrate and the second sapphire substrate.
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6. A projection-type liquid crystal display device according claim 3 wherein the sapphire substrate is attached onto an outer surface of the liquid crystal panel, and a light shielding layer having a window of a size larger by 0.1 mm or more than an effective pixel area of the liquid crystal panel is applied to the sapphire substrate.
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7. A projection-type liquid crystal display device according claim 3 wherein an antireflection coating is applied onto a surface of the sapphire substrate.
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8. The projection-type liquid crystal display device according to claim 1,
wherein the sapphire substrate is attached onto an outer surface of the liquid crystal panel, and a light shielding layer having a window of a size larger by 0.1 mm or more than a size of the effective pixel of the liquid crystal panel is applied to the sapphire substrate. -
9. A projection-type liquid crystal display device according claim 8, further comprising:
a metallic radiation fin is bonded to the sapphire substrate.
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11. A projection-type liquid crystal display device according claim 8 further comprising:
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a second sapphire substrate facing the first sapphire substrate;
wherein the liquid crystal panel is sandwiched between the first sapphire substrate and the second sapphire substrate.
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10. A projection-type liquid crystal display device according clam 8, wherein an antireflection coating is applied onto a surface of the sapphire substrate.
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12. A projection-type liquid crystal display device comprising:
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a light source;
a wavelength selective optical component for transmitting or reflecting light having a specific wavelength band;
a liquid crystal panel, wherein the liquid crystal panel includes a transparent substrate;
a lens; and
a polarizer having a polarizer film and a retaining plate for retaining the polarizer film, wherein at least any one of the wavelength selective optical component, the lens, the retaining plate and the transparent substrate is comprised of a sapphire substrate, wherein light from the light source is transmitted through the lens, the polarizer and the liquid crystal panel so as to be projected, and wherein the sapphire substrate is constructed in a manner that an angle made by a C-axis direction or C-axis projection line direction and a polarized light transmission axis is set within a range of ±
2°
, or an angle made by an axis perpendicular to the C-axis and a polarized light transmission axis is set within a range of ±
2°
, or an angle made by a C-plane and a plane vertical to a transmission direction of a polarized light to be transmitted is set within a range of ±
2°
.- View Dependent Claims (13)
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14. A projection-type liquid crystal display device comprising:
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a light source;
a liquid crystal panel, wherein the liquid crystal panel includes a transparent substrate;
a lens; and
a polarizer having a polarizer film and a retaining plate for retaining the polarizer film, wherein at least any one of the lens, the retaining plate and the transparent substrate is comprised of a sapphire substrate, and wherein light from the light source is transmitted through the lens, the polarizer and the liquid crystal panel so as to be projected, and wherein the lens is a rod-type integrator lens for diffusing light from the light source, and the integrator lens is formed of sapphire.
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15. A projection-type liquid crystal display device comprising:
-
a light source;
a wavelength selective optical component for transmitting or reflecting light having a specific wavelength band;
a liquid crystal panel, wherein the liquid crystal panel includes a transparent substrate;
a lens; and
a polarizer having a polarizer film and a retaining plate for retaining the polarizer film, wherein at least any one of the wavelength selective optical component, the lens, the retaining plate and the transparent substrate is comprised of a sapphire substrate, wherein light from the light source is transmitted through the lens, the polarizer and the liquid crystal panel so as to be projected, and wherein the lens is a rod-type integrator lens for diffusing light from the light source, and the integrator lens is formed of sapphire.
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16. A projection-type liquid crystal display device comprising:
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a liquid crystal panel having a first sapphire substrate and a second sapphire substrate used as a pair of transparent substrates facing each other with a liquid crystal layer sandwiched therebetween, wherein the primary plane of the first sapphire substrate is any one of an R-plane, an A-plane, an M-plane and a C-plane, wherein the primary plane of the second sapphire substrate is any one of an R-plane, an A-plane, an M-plane and a C-plane, wherein the first sapphire substrate and the second sapphire substrate face each other so that each specific crystal axis thereof substantially coincide with a polarization transmission axis of polarized light to be transmitted, and the liquid crystal panel further includes;
pixels which are arranged in a matrix on the first sapphire substrate so as to be aligned with the specific crystal axis direction of the first sapphire substrate;
a vertical scanning circuit and a horizontal scanning circuit which are formed with the use of a thin film transistor comprised of silicon made by epitaxial growth on the first sapphire substrate, and send a video signal to the pixels; and
a transparent electrode formed on the second sapphire substrate. - View Dependent Claims (17, 18, 19, 20)
a metallic radiation fin is bonded to the sapphire substrate.
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18. The liquid crystal display device according to claim 16, wherein the pixels are arranged in a matrix so as to be substantially parallel with or perpendicular to the specific crystal axis direction of the first sapphire substrate.
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19. A liquid crystal display device according to claim 16, wherein the first and second sapphire substrates are constructed in a manner that an angle made by each specific crystal axis thereof and a polarization transmission axis of a polarized light to be transmitted is set within a range of ±
- 2°
.
- 2°
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20. A liquid crystal display device according to claim 16, wherein each specific crystal axis of the first and second sapphire substrates is an A-axis or C-axis projection line direction in the case where its primary plane is an R-plane, is a C-axis or M-axis direction in the case where its primary plane is an A-plane, is a C-axis or A-axis direction in the case where its primary plane is an M-plane, and is an A-axis or M-axis direction in the case where its primary plane is a C-plane.
Specification