Face light source module structure

Details Face light source module structure Face light source module structure

2001-09-10

2003-07-29

Quach-Lee, Y. My (Department: 2875)

Illumination

Revolving

C362S027000, C362S330000, C362S800000

Reexamination Certificate

active

06598989

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention is related to a face light source module structure in which the light guiding board is plated with mirror face coatings and anti-reflection coatings. The anti-reflection coating of the outgoing face has a leakage design. The face light source module is able to enhance the reflection efficiency within the light guiding board and the evenness of distribution of the light.
FIGS. 4 and 5
show a conventional face lighting device including a light guiding bar
8
. Each of two ends of the light guiding bar
8
is provided with a point light source
81
. The light guiding bar
8
has a reflective face
82
and an outgoing face
83
. Multiple reflective sections
821
are arranged on the reflective face
82
at intervals. The reflective sections
821
define therebetween V-shaped channels. The light emitted from the point light source
81
is reflected and diverged by the reflective sections
821
to go out from the outgoing face
83
to a light guiding board
84
. The light guiding board
84
also has a reflective face
85
having multiple reflective sections
851
. The reflective sections
851
also define therebetween V-shaped channels for reflecting to a liquid crystal display panel
86
.
In the above structure, the light guiding bar
8
and the light guiding board
84
are both formed with multiple reflective sections
821
,
851
defining therebetween V-shaped channels for reflecting light. It is quite difficult to manufacture such reflective sections
821
,
851
so that the ratio of good product is not high and the manufacturing cost as a whole will be increased.
Moreover, only the reflective faces
82
,
85
of the light guiding bar
8
or light guiding board
84
are formed with the V-shaped reflective sections
821
,
851
for reflecting light. Therefore, the light will partially spill from the light guiding bar
8
or light guiding board
84
. Only a part of the light is reflected to the liquid crystal display panel
86
. As a result, the brightness of the display panel can be hardly enhanced. In addition, when the light is reflected within the light guiding board
84
, a part of the light will spill from the light guiding board
84
and only a part of the light is reflected to one side of the light guiding board
84
distal from the light guiding bar
8
. Therefore, the light reflected to the liquid crystal display panel
86
is unevenly distributed.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a face light source module structure including more than one light sources and a light guiding board. One face of the light guiding board adjacent to the light sources is defined as an incoming face. One face of the light guiding board opposite to the incoming face is defined as a first reflective face plated with a mirror face coating. One face of the light guiding board adjacent to the liquid crystal module is defined as an outgoing face. The face opposite to the outgoing face is defined as a second reflective face. The outgoing face and the second reflective face are respectively evaporated with two anti-reflection coatings. The anti-reflection coating of the outgoing face has a leakage design. After going into the light guiding board, the light of the light sources is totally reflected to project through the leakage design of the outgoing face toward the liquid crystal module. The brightness of the face light source module is increased.
It is a further object of the present invention to provide the above face light source module structure in which the light guiding board is plated with mirror face coatings and anti-reflection coatings so that the reflection efficiency within the light guiding board is enhanced and the light can be evenly reflected within the light guiding board.
It is still a further object of the present invention to provide the above face light source module structure in which it is unnecessary to process the light guiding board to form V-shaped reflective sections thereon. Therefore, the manufacturing cost is lowered and the ratio of good product is increased.
The present invention can be best understood through the following description and accompanying drawings wherein:


REFERENCES:
patent: 5743616 (1998-04-01), Giuliano et al.
patent: 6196691 (2001-03-01), Ochiai
patent: 6231201 (2001-05-01), Rupp
patent: 6254246 (2001-07-01), Tiao et al.
patent: 6352350 (2002-03-01), Ma
patent: 6464367 (2002-10-01), Ito et al.

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