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Projection type liquid crystal display unit
| Details |
Inventors: Fujishiro, Fumihiko;
Assignee: NEC Corporation (Tokyo, JP); NEC LCD Technologies, Ltd. (Kanagawa, JP)
Primary Examiner: Kim; Robert H.
Assistant Examiner: Chung; David
Attorney, Agent or Firm: Young & Thompson
A projection type liquid crystal display unit includes (a) a first frame (13) having a first surface (15) formed with a first opening (13a), (b) a second frame (12) having a second surface formed with a second opening (12a), and (c) a liquid crystal display panel (11) sandwiched between the first and second frames (13, 12) such that an incident light passes through the second opening (12a), the liquid crystal display panel (11) and the first opening (13a) in this order. The first and second frames (13, 12) are both composed of resin, and the first surface (15) of the first frame (13) is roughened. |
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DETAILED DESCRIPTION In view of the above-mentioned problems in the conventional liquid crystal display units, it is an object of the present invention to provide a projection type liquid crystal display unit which is capable of preventing light reflection without an increased burden in designing a liquid crystal display unit and further without an increase in both the number of parts and fabrication costs.
In one aspect of the present invention, there is provided a projection type liquid crystal display unit including (a) a liquid crystal display panel, and (b) a frame which supports the liquid crystal display panel therewith, the frame being composed of resin and having a first surface formed with an opening, an incident light passing through the liquid crystal display panel and then the opening, the first surface being roughened.
It is preferable that the frame is manufactured by means of a mold having a roughened inner surface such that the first surface is roughened in accordance with the roughened inner surface.
For instance, the frame may be composed of polyphenylene sulfide (PPS), polycarbonate (PC), liquid crystal polymer (LCP), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), or polyether nytril (PEN).
For instance, the first surface may be roughened by sand blasting, plasma etching, etching through the use of chemicals, corona discharging or radiation of ultra violet having a short wavelength.
It is preferable that an interval between a recess and a projection in the roughened first surface is equal to or smaller than 100 .
mu.
m in average.
There is further provided a projection type liquid crystal display unit including (a) a liquid crystal display panel, and (b) a frame which supports the liquid crystal display panel therewith, the frame being composed of resin and having a first surface formed with an opening through which the liquid crystal display panel is exposed, an incident light being reflected at the liquid crystal display panel being exposed through the opening, the first surface being roughened
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LCD 
