Liquid crystal display viewable under all lighting conditions
First Claim
1. A liquid crystal display comprising:
- (a) a first dichroic polarizer having a front side and a rear side;
(b) a second dichroic polarizer;
(c) an anti-reflection layer positioned in front of the first dichroic polarizer;
(d) a liquid crystal cell positioned between the first dichroic polarizer and the second dichroic polarizer;
(e) a backlight assembly positioned behind the second dichroic polarizer; and
(f) a diffusing transflector positioned between the backlight assembly and the second, dichroic polarizer, the diffusing transflector comprising a diffusing element and a transflective element.
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Abstract
A liquid crystal display (LCD) viewable under all lighting conditions without excessive power consumption is described. The LCD comprises a first dichroic polarizer, a second dichroic polarizer, an anti-reflection layer positioned in front of the first dichroic polarizer and a liquid crystal cell positioned between the first dichroic polarizer and the second dichroic polarizer. In addition, the LCD comprises a backlight assembly positioned behind the second dichroic polarizer. Finally, the LCD comprises a diffusing transflector positioned between the backlight assembly and the second dichroic polarizer. The diffusing transflector comprises a diffusing element and a transflective element.
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Citations
28 Claims
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1. A liquid crystal display comprising:
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(a) a first dichroic polarizer having a front side and a rear side;
(b) a second dichroic polarizer;
(c) an anti-reflection layer positioned in front of the first dichroic polarizer;
(d) a liquid crystal cell positioned between the first dichroic polarizer and the second dichroic polarizer;
(e) a backlight assembly positioned behind the second dichroic polarizer; and
(f) a diffusing transflector positioned between the backlight assembly and the second, dichroic polarizer, the diffusing transflector comprising a diffusing element and a transflective element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A liquid crystal display comprising:
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(a) a first dichroic polarizer with a first transmission direction;
(b) a second dichroic polarizer with a second transmission direction, the second transmission direction forming an angle between 0 and 90 degrees relative to the first transmission direction;
(c) an anti-reflection layer positioned in front of the first dichroic polarizer with reflection energy less than 1% and a surface with a haze value less than 15%;
(d) a liquid crystal cell positioned between the first dichroic polarizer and the second dichroic polarizer;
(e) a backlight assembly positioned behind the second dichroic polarizer, the backlight assembly having 1 to 12 lamps and multiple polymeric films enhancing light transmission and optical performances, the lamps being edged or back-sided; and
(f) a diffusing transflector positioned between the backlight assembly and the second dichroic polarizer, the diffusing transflector comprising a diffusing element and a transflective element, the diffusing element having a corrugated surface with a haze value of 10% to 85%, and the transflective element being either a selective reflective polarizer with an extinction coefficient of 1.5 to 9 and an absorption of incident energy value less than 10%, or a beam splitter with a transmission value of 30% to 85%.
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23. A liquid crystal display comprising:
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(a) a first dichroic polarizer with a first transmission direction;
(b) a second dichroic polarizer with a second transmission direction, the second transmission direction forming an angle between 0 and 90 degrees relative to the first transmission direction;
(c) an anti-reflection layer positioned in front of the first dichroic polarizer with reflection energy less than 1% and a surface with a haze value less than 15%;
(d) a liquid crystal cell positioned between the first dichroic polarizer and the second dichroic polarizer;
(e) a backlight assembly positioned behind the second dichroic polarizer, the backlight assembly having 1 to 12 lamps and multiple polymeric films enhancing light transmission and optical performances, the lamps being edged or back-sided; and
(f) a diffusing transflector positioned between the liquid crystal cell and the second dichroic polarizer, the diffusing transflector comprising a diffusing element and a transflective element, the diffusing element having a corrugated surface with a haze value of 10% to 85%, and the transflective element being a beam splitter with a transmission value of 30% to 85%.
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24. A method of optimizing viewing performance of an LCD having a liquid crystal cell positioned between a first dichroic polarizer and a second dichroic polarizer, and a backlight assembly positioned behind the second dichroic polarizer, the method comprising the steps of:
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(a) positioning an anti-reflection layer in front of the first dichroic polarizer; and
(b) positioning a diffusing transflector between the backlight assembly and the second dichroic polarizer, the diffusing transflector comprising a diffusing element and a transflective element. - View Dependent Claims (25)
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26. A method of optimizing viewing performance of an LCD having a liquid crystal cell positioned between a first dichroic polarizer and a second dichroic polarizer, a backlight assembly positioned behind the second dichroic polarizer, and a transflective element positioned between the backlight assembly and the second dichroic polarizer, the method comprising the steps of:
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(a) positioning an anti-reflection layer in front of the first dichroic polarizer; and
(b) positioning a diffusing element between the second dichroic polarizer and the transflective element. - View Dependent Claims (27)
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28. A method of optimizing viewing performance of an LCD having a liquid crystal cell positioned between a first dichroic polarizer and a second dichroic polarizer, a backlight assembly positioned behind the second dichroic polarizer, and a diffusing transflector positioned between the backlight assembly and the second dichroic polarizer, the method comprising the step of positioning an anti-reflection layer in front of the first dichroic polarizer.
Specification