Electro-optical flat-design display device, in particular LCD ar

Details Electro-optical flat-design display device, in particular LCD ar Electro-optical flat-design display device, in particular LCD ar

1989-12-07

1991-09-03

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 70, 362 26, 362 31, G02F 113, F21V 704

Patent

active

050447343

ABSTRACT:
The invention relates to an electro-optical flat-design display device, in particular to an LCD area, comprising a flat-design housing 1 having at least one line of display elements 10 forming the front 8 of the housing 1, and comprising a backlighting device disposed inside the housing 1 and assigned to the line of display elements 10. For reducing the heat load of the LCD display elements 10 and for simplifying the construction of the housing 1, it is provided, according to the invention, that the backlighting device includes a light-guide tube 12, 17 disposed inside the housing 1 and a light source 18 disposed at a light entrance opening of the light-guide tube 12, 17, that the light-guide tube 12 is made from transparent material and surrounded by a reflector material 14, and that the reflector material 14 comprises cutouts 15 assigned to the individual display elements 10 and serving as light-exit openings FIG. 2.

REFERENCES:
patent: 4043636 (1977-08-01), Eberhardt et al.
patent: 4126383 (1978-11-01), Doriguzzi et al.
patent: 4775222 (1988-10-01), Ohe
patent: 4822145 (1989-04-01), Staelin
patent: 4838661 (1989-06-01), McKee et al.
Digital Technology Review, "Fluorescence Activated LCDs May Serve in Low Light Conditions", Computer Design, vol. 16, No. 10, Oct. 1977.
Bush et al., "Liquid Crystal Display Device", IBM, vol. 14, No. 1, Jun. 1971.

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