Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2001-07-24
2004-03-30
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S046000, C362S800000
Reexamination Certificate
active
06713956
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a display module, especially to a display module with excellent heat-dissipation effect and more uniform light.
BACKGROUND OF THE INVENTION
The light emitting diodes (LED) are extensively used in indication and illumination application. The LEDs are generally made of direct-bandgap material with two electrodes. The electrical power is applied through the electrodes to generate electron and hole pair. The electron and hole pair is recombined to emit light. The LED can be roughly classified to visible light LED and infrared LED according to the emitting wavelength thereof. The LEDs have salient properties over the conventional light bulb such as compact volume, lower power consumption, lower thermal radiation and long life. Therefore, the LEDs are extensively used in indication usage in place of light bulb.
Moreover, as the advent and maturity of high brightness LED, the application of LEDs is broadened to compass bulletin board. The high brightness LEDs have the advantages of broad view angle, stable picture, easy assembling and thin thickness. The full color high brightness LED is realized as the high brightness LEDs of three primitive colors are successfully developed.
FIG. 1
shows the sectional view of prior art LED display panel. The LEDs
11
a
are arranged in 3×3, 4×4, or 4×8 array and assembled to a display module
1
a
. A plurality of display modules
1
a
are assembled to a larger display panel. The LEDs
11
a
are packaged by epoxy resin and soldered to a printed circuit board
12
a
. Afterward, the LEDs
11
a
are arranged within a shade
13
a
formed by mold ejection and are retained by filling resin
14
a
. The shade
13
a
provides a sun blind
131
a
for the LEDs
11
a.
However, the display module la has not satisfactory heat dissipation effect such that the heat caused by insolation or driving of the LEDs cannot be easily dissipated. The performance of the display module
1
a
is degraded.
SUMMARY OF THE INVENTION
It is the object of the present invention to provide a display module with excellent heat-dissipation effect and more uniform light.
To achieve above object, the present invention provides a display module comprising a plurality of light emitting elements, a metal plate, a circuit board and a display panel. The light emitting elements and the circuit board are arranged on the metal plate, and the light emitting elements are wire bonded to the circuit board. A lens is formed atop the light emitting element. The metal plate is arranged with the light emitting elements and the circuit board is positioned on lateral side or around the display panel. The metal plate provides excellent heat-dissipation effect and the light emitting elements can emit more uniform light.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:
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Chen Chen-Lun Hsing
Lee Po-Hsien
Li I-Hsiang
Guharay Karabi
Lite-On Technology Corporation
Patel Nimeshkumar D.
Rabin & Berdo P.C.
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