LCD apparatus and method for enhancing luminance efficiency thereof with a backlight module generating an elliptically polarized light
First Claim
1. A liquid crystal display (LCD) apparatus, comprising:
- a backlight module for generating a first polarized light, wherein the backlight module comprises a V-cut film, and the first polarized light is elliptically polarized light;
a first polarizer disposed downstream of the backlight module and having a transmission axis;
a half-wavelength retardation plate disposed between the backlight module and the first polarizer, for converting the first polarized light passing through the half-wavelength retardation plate into a second polarized light parallel to the transmission axis;
a second polarizer disposed downstream of the first polarizer; and
a liquid crystal unit disposed between the first polarizer and the second polarizer, wherein the second polarized light is transmittable out of the LCD apparatus through the first polarizer, the liquid crystal unit and the second polarizer.
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Accused Products
Abstract
An LCD apparatus includes a first polarizer, a half-wavelength retardation plate, a liquid crystal unit and a second polarizer. The LCD apparatus further has a backlight module for generating first polarized light. The first polarizer is disposed downstream of the backlight module, and the first polarizer has a transmission axis. The half-wavelength retardation plate is disposed between the backlight module and the first polarizer. Second polarized light parallel to the transmission axis is generated from the first polarized light passing through the half-wavelength retardation plate. The second polarizer is disposed downstream of the first polarizer. The liquid crystal unit is disposed between the first polarizer and the second polarizer, and the second polarized light emits out of the LCD apparatus through the first polarizer, the liquid crystal unit and the second polarizer.
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Citations
14 Claims
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1. A liquid crystal display (LCD) apparatus, comprising:
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a backlight module for generating a first polarized light, wherein the backlight module comprises a V-cut film, and the first polarized light is elliptically polarized light; a first polarizer disposed downstream of the backlight module and having a transmission axis; a half-wavelength retardation plate disposed between the backlight module and the first polarizer, for converting the first polarized light passing through the half-wavelength retardation plate into a second polarized light parallel to the transmission axis; a second polarizer disposed downstream of the first polarizer; and a liquid crystal unit disposed between the first polarizer and the second polarizer, wherein the second polarized light is transmittable out of the LCD apparatus through the first polarizer, the liquid crystal unit and the second polarizer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for enhancing luminance efficiency of a liquid crystal display (LCD) apparatus, the method comprising steps of:
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generating a first polarized light by a backlight module of the LCD apparatus, wherein the backlight module comprises a V-cut film, and the first polarized light is elliptically polarized light; converting the first polarized light into a second polarized light parallel to a transmission axis of a first polarizer of the LCD apparatus, wherein the first polarized light is converted into the second polarized light by a half-wavelength retardation plate; and emitting the second polarized light out of the LCD apparatus sequentially through the first polarizer, as well as a liquid crystal unit and a second polarizer of the LCD apparatus. - View Dependent Claims (8, 9, 10)
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11. An optical structure for enhancing luminance efficiency of a liquid crystal display (LCD) apparatus having a backlight module for generating a first polarized light, the optical structure comprising:
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a first polarizer adapted to be disposed downstream of the backlight module and having a transmission axis; and a half-wavelength retardation plate having a slow axis, wherein the backlight module comprises a V-cut film, and the first polarized light generated by the backlight module is elliptically polarized light; an angle of the slow axis is substantially equal to one half of a sum of an angle of the first polarized light and an angle of the transmission axis of the first polarizer, all of said angles being relative to a common reference line; and the half-wavelength retardation plate is adapted to be disposed between the backlight module and the first polarizer and to generate a second polarized light parallel to the transmission axis from the first polarized light passing through the half-wavelength retardation plate. - View Dependent Claims (12, 13, 14)
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Specification