Browse Prior Art Database

Backlight Structure

IP.com Disclosure Number: IPCOM000119301D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Matino, H: AUTHOR [+2]

Abstract

Disclosed is a backlight device for transmissive liquid crystal display (LCD). This device consists of a transparent sheet located beneath the LCD, a reflective sheet, and lamps between two sheets, as shown in Fig. 1.

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This is the abbreviated version, containing approximately 100% of the total text.

Backlight Structure

      Disclosed is a backlight device for transmissive liquid
crystal display (LCD).  This device consists of a transparent sheet
located beneath the LCD, a reflective sheet, and lamps between two
sheets, as shown in Fig. 1.

      The transparent sheet has such a characteristic that visible
radiation passes through it but infrared radiation is reflected by
it.  Indium Tin Oxide, with its thickness of around 300 microns, is
suitable for that purpose (Fig. 2). The reflective sheet, on the
contrary, reflects visible radiation but allows infrared radiation to
pass through it. Silicone, which is transparent to rays with
wavelength of more than 1 micron but is reflective to visible
radiation with reflection rate of around 30%, can be applied to this
reflection sheet (Fig. 3).

      In conclusion, most of visible radiation with least infrared
radiation goes into the LCD, and most of infrared radiation with
least visible radiation goes outside of liquid crystal display for
heat dissipation.