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Small-pitch LED display module and manufacturing method thereof

A manufacturing method and display module technology, which are applied to identification devices, instruments, semiconductor devices, etc., can solve the problems that small-pitch LED display modules cannot take into account high reliability and low-cost optical performance, and achieve improved anti-reflection effects and convenient processing Reliable, moiré-reducing effects

Active Publication Date: 2021-11-16
LEYARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a small-pitch LED display module and its manufacturing method to solve the problem that the small-pitch LED display module in the prior art cannot take into account high reliability, low cost and good optical performance in terms of LED protection technology

Method used

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  • Small-pitch LED display module and manufacturing method thereof
  • Small-pitch LED display module and manufacturing method thereof
  • Small-pitch LED display module and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this embodiment, a small-pitch LED display module is produced, and the specific process is as follows:

[0049] Select the LED light board with model TVH2.5 set on the mounting substrate, the LED dot pitch is 2.5mm, and the size is 200×150mm;

[0050] Use room temperature curing epoxy resin glue to fill the side of the LED light board away from the mounting substrate;

[0051] Secondly, use the AG frosted board (surface roughness 0.2μm) to press the side carrying the glue (pressure 0.04MPa), make the glue enter the gap between the LEDs and squeeze out the excess glue, and then carry out Curing (6h) to form a protective colloid, and then form a prefabricated module; the protective colloid includes a first colloid part and a second colloid part, the first colloid part is arranged in the gap between each LED; the second colloid part is located in the first colloid part And on the upper surface of the LED, the thickness of the second colloidal part is 0.1 mm, and the su...

Embodiment 2

[0055] The manufacturing process of the small-pitch LED display module in this embodiment is the same as that in Embodiment 1, the difference lies in:

[0056] The surface roughness of the AG frosted board is 0.2μm, the pressing pressure is 0.005MPa, the thickness of the second colloid part in the formed protective colloid is 0.8mm, and the surface of the second colloid part away from the circuit board is a rough surface, rough The degree is 2 μm, the haze of the second colloidal part is 10%, and the glossiness is 85. The performance of the above-mentioned small-pitch LED display module was characterized, and the reflectance of visible light was 3%.

Embodiment 3

[0058] The manufacturing process of the small-pitch LED display module in this embodiment is the same as that in Embodiment 1, the difference lies in:

[0059] The surface roughness of the AG frosted board is 0.2μm, the pressing pressure is 0.02MPa, the thickness of the second colloid part in the formed protective colloid is 0.5mm, and the surface of the second colloid part away from the circuit board is a rough surface, rough The thickness is 1 μm, the haze of the second colloidal part is 8%, and the glossiness is 75. The performance of the above-mentioned small-pitch LED display module was characterized, and the reflectance of visible light was 1%.

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Abstract

The invention provides a small-pitch LED display module and a manufacturing method thereof. The small-pitch LED display module includes a mounting substrate, an LED light board and a protective colloid. The LED lamp board includes a circuit board and a plurality of LEDs arranged at intervals on the circuit board. A colloid part and a second colloid part, the first colloid part is arranged in the gap between each LED; the second colloid part is located on the upper surface of the first colloid part and the LED, and the thickness of the second colloid part is less than 1.0mm The surface on one side of the circuit board is a rough surface. The protective colloid plays a good role in protecting each LED, and the second colloid part makes surface cleaning easier. In addition, the thinner thickness and rough surface of the second colloid part are beneficial to reduce the moiré problem caused by the protective colloid, so that the display module has better anti-glare performance.

Description

technical field [0001] The invention relates to the technical field of LED display, in particular to a small-pitch LED display module and a manufacturing method thereof. Background technique [0002] The LED display screen is composed of LED dot matrix. Text and pictures are displayed by turning on and off the lamp beads. The content can be replaced at any time. Each part of the component is a display device with a modular structure. LED display modules usually include a mounting substrate and an LED light board. The LED light board includes a circuit board and multiple LEDs arranged in an array on the circuit board. According to the spacing between LEDs, LED display modules are divided into large-pitch type and small-pitch type. Spacing type. [0003] For the small-pitch LED display module, it is not waterproof. At the same time, the welding force of the LED is small and it is close to the edge of the light board. When the gas is too large, various problems such as dead l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F9/33G09F9/302
CPCG09F9/33H01L25/0753H01L33/56H01L2933/005H01L33/54H01L33/62H01L2933/0058
Inventor 张龙虎王宏伟王勇
Owner LEYARD