Phase delay element for transmissive and reflective type liquid crystal display
First Claim
1. A substrate comprising:
- an insulating plate having a pixel area, the pixel area defined by a reflection region and a transmission window;
a switching element formed in the pixel area;
a pixel electrode electrically connected to the switching element;
a reflection layer disposed in alignment with the reflection region, the reflection layer being receptive to a front light emitted from a viewer'"'"'s side outside of the substrate being reflected from the reflection layer toward the viewer'"'"'s side, the reflection layer being receptive to a backside light emitted from a backside of the substrate opposite the viewer'"'"'s side being reflected from the reflection layer toward the backside; and
a brightness enhancement layer formed intermediate the reflection layer and the backside light, wherein the backside light being emitted from the backside toward the reflection layer through the brightness enhancement layer becomes a reflection light being emitted from the reflection layer toward the backside through the brightness enhancement layer,wherein the brightness enhancement layer delays a phase of the backside light by about 1/4 phase providing a phase-delayed backside light to the reflection layer, and the brightness enhancement layer delays a phase of the reflection light by about 1/4 phase providing a phase-delayed reflection light to the backside.
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Accused Products
Abstract
A phase delay element includes a brightness enhancement layer intermediate a reflection layer and an artificial light. The brightness enhancement layer is defined by a first surface and an opposite second surface. The first surface faces the reflection layer. A first light from the artificial light is incident on the second surface. A phase of the first light is delayed by about 1/4 phase (λ/4) so that a second light is emitted from the first surface toward the reflection layer. The second light is reflected from the reflection layer so that a third light is emitted from the reflection layer toward the first surface. A phase of the third light is delayed by about 1/4 phase (λ/4) so that a fourth light is emitted from the second surface. Therefore, a portion of the artificial light, which is reflected from the reflection layer, is recycled to improve a luminance of an LCD apparatus.
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Citations
18 Claims
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1. A substrate comprising:
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an insulating plate having a pixel area, the pixel area defined by a reflection region and a transmission window; a switching element formed in the pixel area; a pixel electrode electrically connected to the switching element; a reflection layer disposed in alignment with the reflection region, the reflection layer being receptive to a front light emitted from a viewer'"'"'s side outside of the substrate being reflected from the reflection layer toward the viewer'"'"'s side, the reflection layer being receptive to a backside light emitted from a backside of the substrate opposite the viewer'"'"'s side being reflected from the reflection layer toward the backside; and a brightness enhancement layer formed intermediate the reflection layer and the backside light, wherein the backside light being emitted from the backside toward the reflection layer through the brightness enhancement layer becomes a reflection light being emitted from the reflection layer toward the backside through the brightness enhancement layer, wherein the brightness enhancement layer delays a phase of the backside light by about 1/4 phase providing a phase-delayed backside light to the reflection layer, and the brightness enhancement layer delays a phase of the reflection light by about 1/4 phase providing a phase-delayed reflection light to the backside. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A phase delay element for a LCD apparatus comprising:
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a brightness enhancement layer disposed between a backlight and a reflection layer, the brightness enhancement layer defined by a bottom member and a counter member, the counter member being integrally formed with the bottom member, the counter member being disposed facing the reflection layer, wherein a first light having a wavelength phase (λ
) incident on the bottom member is delayed by about 1/4 phase (λ
/4) emitting a second light that from the counter member toward the reflection layer, the second light being reflected from the reflection layer to become a third light that is emitted from the reflection layer toward the counter member, a phase of the third light is delayed by about 1/4 phase (λ
/4) passing through the brightness enhancement layer emitting a fourth light from the bottom member. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification