LED (light-emitting diode) dot matrix display screen

A technology of display screen and LED chip, applied in the field of display screen, can solve the problems of poor heat dissipation, low luminous efficiency and short heat dissipation path of LED dot matrix, and achieve the effect of good heat dissipation effect, manpower saving and high heat dissipation efficiency.

Inactive Publication Date: 2012-09-19
JIANGMEN JUNDA OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of poor heat dissipation, short life and low luminous efficiency of the existing LED dot matrix, the technical problem to be solved by the present invention is to provide a short heat dissipation path, and the path from each LED light-emitting unit to the heat dissipation hole is equal or approximately Equal, the air in the cooling hole can pass through the natural convection of the two ends of the cooling hole LED dot matrix display

Method used

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  • LED (light-emitting diode) dot matrix display screen
  • LED (light-emitting diode) dot matrix display screen
  • LED (light-emitting diode) dot matrix display screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as Figures 1 to 3 As shown, an LED dot-matrix display screen includes a display frame 31, a light-transmitting sealing plate 32, a light-transmitting cover 33, a uniform array of LED lamp beads 34, a heat-dissipating PCB substrate 35, and a heat-dissipating substrate 36. The integration of control and drive Circuit components (not shown), a layout circuit conductive layer (not shown) electrically connected to the positive and negative pins of the LED lamp bead 34 , the electric control device 37 , and the data interface 38 . The LED lamp bead 34 is fixed on the heat dissipation PCB substrate 35, the conductive layer of the layout circuit is arranged on the surface of the heat dissipation PCB substrate 35 on which the lamp bead 34 is fixed, and the integrated circuit components are arranged on the heat dissipation PCB substrate 35 and the fixed LED lamp bead 34 phase. back face. The surface of the heat dissipation PCB substrate 35 provided with integrated circuit ...

Embodiment 2

[0048] Such as Figure 4 to Figure 6 As shown, an LED dot-matrix display screen includes a light-transmitting cover 60, a plastic plate 61 for positioning the lens, a PCB board 62, a heat dissipation base 63, a flow channel cover plate 64, an LED light-emitting unit, and a cloth electrically connected to the LED light-emitting unit. The conductive layer of the layout circuit (not shown), the integrated circuit components for control and driving (not shown), the electric control device 65 electrically connected with the external power supply and the conductive layer of the layout circuit, and a data interface 66 . Each LED light-emitting unit includes an LED chip 67, a lens 68, and a gold wire 69 electrically connecting the LED chip 67 and the conductive layer of the layout circuit.

[0049] The heat dissipation base 63 includes a bottom plate 70 , and a plurality of chip fixing bosses 71 protruding from the bottom plate 70 integrally formed with the heat dissipation base 63 , ...

Embodiment 3

[0057] Such as Figure 7 , Figure 8 As shown, the difference from Embodiment 2 is that each LED light-emitting unit includes two LED chips 100 and LED chips 101 of two primary colors, that is, two LED chips 100 of different colors are fixed on each chip fixing boss 102 , LED chips 101 .

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Abstract

The invention discloses an LED (light-emitting diode) dot matrix display screen which comprises a heat-dissipating substrate, LED light-emitting units, an imaging controller and a layout circuit conducting layer, wherein the LED light-emitting units are uniformly arrayed; each LED light-emitting unit is separately electrically connected with the imaging controller through the layout circuit conducting layer; the LED light-emitting units are fixed on the heat-dissipating substrate; the central position of every four adjacent LED light-emitting units is provided with a straight heat-dissipating through hole, each LED light-emitting unit is adjacent to the straight heat-dissipating through hole, and the straight heat-dissipating through hole passes through the heat-dissipating substrate; the LED dot matrix display screen also comprises a display-screen outline border, and the display-screen outline border is provided with an accommodating cavity (the bottom surface thereof is provided with an opening); and a position (facing to each LED light-emitting unit) on the front surface of the display-screen outline border is provided with a through hole for covering the LED light-emitting unit, the through hole is provided with a light-pervious seal plate, a position (close to the upside of the display-screen outline border) on the back face of the display-screen outline border is provided with heat-dissipating holes, and the back face of the display-screen outline border is also convexly provided with a rain cover for preventing rainwater from entering the accommodating cavity. The LED dot matrix display screen has the advantages of good heat dissipation and waterproof properties.

Description

technical field [0001] The invention relates to a display screen, in particular to an LED dot matrix display screen. Background technique [0002] Compared with traditional light sources, LED light-emitting diodes have no lead, mercury, no flicker, energy saving and environmental protection, long service life, fast response speed, vibration resistance, easy maintenance, high brightness, low energy consumption, less ultraviolet radiation and environmental pollution, and use High security and many other advantages are widely used in display screen imaging. [0003] The light decay and lifetime of LED light sources are directly related to their junction temperature. LED lights, especially high-power LED light sources, concentrate heat when emitting light. If the heat generated by the LED chip is not dissipated in time, the junction temperature will be very high and the lifespan will be short. According to Ares' law, for every 10°C decrease in temperature, the life span will b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/33H05K7/20
Inventor 杨东佐
Owner JIANGMEN JUNDA OPTOELECTRONICS TECH
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