Drying and gas or vapor contact with solids – Apparatus – For hair on head
Reexamination Certificate
1999-11-30
2003-04-08
Parker, Kenneth (Department: 2871)
Drying and gas or vapor contact with solids
Apparatus
For hair on head
C359S490020
Reexamination Certificate
active
06543153
ABSTRACT:
TECHNICAL FIELD
The invention is an improved optical display.
BACKGROUND
Optical displays are widely used for lap-top computers, hand-held calculators, digital watches and the like. The familiar liquid crystal (LC) display is a common example of such an optical display. The conventional LC display locates a liquid crystal and an electrode matrix between a pair of absorptive polarizers. In the LC display, portions of the liquid crystal have their optical state altered by the application of an electric field. This process generates the contrast necessary to display “pixels” of information in polarized light.
For this reason the traditional LC display includes a front polarizer and a rear polarizer. Typically, these polarizers use dichroic dyes which absorb light of one polarization orientation more strongly than the orthogonal polarization orientation. In general, the transmission axis of the front polarizer is “crossed” with the transmission axis of the rear polarizer. The crossing angle can vary from zero degrees to ninety degrees. The liquid crystal, the front polarizer and rear polarizer together make up an LCD assembly.
LC displays can be classified based upon the source of illumination. “Reflective” displays are illuminated by ambient light that enters the display from the “front.” Typically a brushed aluminum reflector is placed “behind” the LCD assembly. This reflective surface returns light to the LCD assembly while preserving the polarization orientation of the light incident on the reflective surface.
It is common to substitute a “backlight” assembly for the reflective brushed aluminum surface in applications where the intensity of the ambient light is insufficient for viewing. The typical backlight assembly includes an optical cavity and a lamp or other structure that generates light. Displays intended to be viewed under both ambient light and backlit conditions are called “transflective.” One problem with transflective displays is that the typical backlight is not as efficient a reflector as the traditional brushed aluminum surface. Also the backlight randomizes the polarization of the light and further reduces the amount of light available to illuminate the LC display. Consequently, the addition of the backlight to the LC display makes the display less bright when viewed under ambient light.
Therefore, there is a need for a display which can develop adequate brightness and contrast under both ambient and backlight illumination.
SUMMARY
The optical display of the present invention comprises three basic elements. The first element is a reflective polarizer. This reflective polarizer is located between a liquid crystal display (LCD) assembly and an optical cavity, which comprise the second and third elements respectively.
REFERENCES:
patent: 1610423 (1926-12-01), Cawley
patent: 2492809 (1949-12-01), Marks
patent: 2604817 (1952-07-01), Schupp
patent: 2776598 (1957-01-01), Dreyer
patent: 2887566 (1959-05-01), Marks
patent: 3124639 (1964-03-01), Kahn
patent: 3213753 (1965-10-01), Rogers
patent: 3423498 (1969-01-01), Lefevre
patent: 3442755 (1969-05-01), Walters et al.
patent: 3448183 (1969-06-01), Chisholm
patent: 3480502 (1969-11-01), Schrenk
patent: 3498873 (1970-03-01), Schrenk
patent: 3528723 (1970-09-01), Rogers
patent: 3556635 (1971-01-01), Schrenk et al.
patent: 3565985 (1971-02-01), Schrenk et al.
patent: 3600587 (1971-08-01), Smith
patent: 3610729 (1971-10-01), Rogers
patent: 3647612 (1972-03-01), Schrenk et al.
patent: 3711176 (1973-01-01), Alfrey, Jr. et al.
patent: 3746485 (1973-07-01), Schrenk
patent: 3759647 (1973-09-01), Schrenk et al.
patent: 3773882 (1973-11-01), Schrenk
patent: 3801429 (1974-04-01), Schrenk et al.
patent: 3847585 (1974-11-01), Chisholm
patent: 3860036 (1975-01-01), Newman, Jr.
patent: 4025688 (1977-05-01), Nagy et al.
patent: 4094947 (1978-06-01), Alfrey, Jr. et al.
patent: 4162343 (1979-07-01), Wilcox et al.
patent: 4190832 (1980-02-01), Mohler
patent: 4212048 (1980-07-01), Castleberry
patent: 4254002 (1981-03-01), Sperling et al.
patent: 4268127 (1981-05-01), Oshima et al.
patent: 4310584 (1982-01-01), Cooper et al.
patent: 4315258 (1982-02-01), McKnight et al.
patent: 4427741 (1984-01-01), Aizawa et al.
patent: 4446305 (1984-05-01), Rogers et al.
patent: 4520189 (1985-05-01), Rogers et al.
patent: 4521588 (1985-06-01), Rogers et al.
patent: 4525413 (1985-06-01), Rogers et al.
patent: 4540623 (1985-09-01), Im et al.
patent: 4542449 (1985-09-01), Whitehead
patent: 4586790 (1986-05-01), Umeda et al.
patent: 4590119 (1986-05-01), Kawakami et al.
patent: 4643529 (1987-02-01), Hosonuma et al.
patent: 4659523 (1987-04-01), Rogers et al.
patent: 4660936 (1987-04-01), Nosker
patent: 4678285 (1987-07-01), Ohta et al.
patent: 4720426 (1988-01-01), Englert et al.
patent: 4756953 (1988-07-01), Utsumi
patent: 4791540 (1988-12-01), Dreyer, Jr. et al.
patent: 4796978 (1989-01-01), Tanaka et al.
patent: 4797308 (1989-01-01), Mattin
patent: 4798448 (1989-01-01), van Raalte
patent: 4799772 (1989-01-01), Utsumi
patent: 4805984 (1989-02-01), Cobb, Jr.
patent: 4824882 (1989-04-01), Nakamura et al.
patent: 4840463 (1989-06-01), Clark et al.
patent: 4883341 (1989-11-01), Whitehead
patent: 4660936 (1990-01-01), Nosker
patent: 4896942 (1990-01-01), Onstott et al.
patent: 4896946 (1990-01-01), Suzuki et al.
patent: 4906068 (1990-03-01), Olson et al.
patent: 4917465 (1990-04-01), Conner et al.
patent: 4937134 (1990-06-01), Schrenk et al.
patent: 4952023 (1990-08-01), Bradshaw et al.
patent: 4974946 (1990-12-01), Solomon
patent: 4989076 (1991-01-01), Owada et al.
patent: 5009472 (1991-04-01), Morimoto
patent: 5042921 (1991-08-01), Sato et al.
patent: 5056888 (1991-10-01), Messerly et al.
patent: 5056892 (1991-10-01), Cobb, Jr.
patent: 5059356 (1991-10-01), Nakamura et al.
patent: 5061050 (1991-10-01), Ogura
patent: 5089318 (1992-02-01), Shetty et al.
patent: 5093739 (1992-03-01), Aida et al.
patent: 5094788 (1992-03-01), Schrenk et al.
patent: 5094793 (1992-03-01), Schrenk et al.
patent: 5095210 (1992-03-01), Wheatley et al.
patent: 5103337 (1992-04-01), Schrenk et al.
patent: 5122905 (1992-06-01), Wheatley et al.
patent: 5122906 (1992-06-01), Wheatley
patent: 5124841 (1992-06-01), Oishi
patent: 5126880 (1992-06-01), Wheatley et al.
patent: 5134516 (1992-07-01), Lehureau et al.
patent: 5138474 (1992-08-01), Arakawa
patent: 5139340 (1992-08-01), Okumura
patent: 5149578 (1992-09-01), Wheatley et al.
patent: 5157526 (1992-10-01), Kondo et al.
patent: 5159478 (1992-10-01), Akiyama et al.
patent: 5166817 (1992-11-01), Ota et al.
patent: 5175030 (1992-12-01), Lu et al.
patent: 5188760 (1993-02-01), Hikmet et al.
patent: 5189538 (1993-02-01), Arakawa
patent: 5194975 (1993-03-01), Akatsuka et al.
patent: 5200843 (1993-04-01), Karasawa et al.
patent: 5202074 (1993-04-01), Schrenk et al.
patent: 5202950 (1993-04-01), Arego et al.
patent: 5210548 (1993-05-01), Grabowski
patent: 5211878 (1993-05-01), Reiffenrath et al.
patent: 5217794 (1993-06-01), Schrenk
patent: 5221928 (1993-06-01), Faris
patent: 5233465 (1993-08-01), Wheatley et al.
patent: 5234729 (1993-08-01), Wheatley et al.
patent: 5235443 (1993-08-01), Barnik et al.
patent: 5237446 (1993-08-01), Takahashi
patent: 5238738 (1993-08-01), Miller
patent: 5245456 (1993-09-01), Yoshimi et al.
patent: 5255029 (1993-10-01), Vogeley et al.
patent: 5262894 (1993-11-01), Wheatley et al.
patent: 5269995 (1993-12-01), Ramanathan et al.
patent: 5278680 (1994-01-01), Karasawa et al.
patent: 5278694 (1994-01-01), Wheatley et al.
patent: 5286418 (1994-02-01), Nakamura et al.
patent: 5294657 (1994-03-01), Melendy et al.
patent: 5295018 (1994-03-01), Konuma et al.
patent: 5303083 (1994-04-01), Blanchard et al.
patent: RE34605 (1994-05-01), Schrenk et al.
patent: 5309422 (1994-05-01), Kuroki et al.
patent: 5316703 (1994-05-01), Schrenk
patent: 5319478 (1994-06-01), Fijnfschilling et al.
patent: 5325218 (1994-06-01), Willett et al.
patent: 5333072 (1994-07-01), Willett
patent: 5337174 (1994-08-01), Wada et al.
patent: 5339179 (1994-08-01), Rudisill et al.
patent: 5339198 (1994-08-01), Wheatley et al.
patent: 5345146 (1994-09-01), Koe
Benson, Jr. Olester
Cobb, Jr. Sanford
Jonza James M.
Ouderkirk Andrew J.
Stover Carl A.
3M Innovative Properties Company
Miller William D.
Parker Kenneth
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