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Backlight module and manufacturing method thereof

A technology for a backlight module and a manufacturing method, applied in the field of backlight, can solve the problems of reducing the manufacturing cost and disadvantage of the backlight module, and achieve the effects of improving market competitiveness, reducing production costs, and reducing screening conditions

Pending Publication Date: 2021-04-16
FOSHAN NATIONSTAR OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the specific implementation, it is necessary to screen the same light-emitting chip according to the actual voltage specification and select the light-emitting chip that meets the required voltage specification separately, while the light-emitting chip that does not meet the required voltage specification is not used, but in specific production, A large number of light-emitting chips with a single specification will bring greater pressure on the supply of raw materials, which is not conducive to reducing the manufacturing cost of backlight modules

Method used

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  • Backlight module and manufacturing method thereof
  • Backlight module and manufacturing method thereof
  • Backlight module and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] image 3 A schematic diagram of a partial structure of a backlight module according to an embodiment of the present invention is shown, Figure 5 A schematic diagram of the circuit structure of the backlight module according to the embodiment of the present invention is shown, Figure 6 A schematic cross-sectional structure diagram of a backlight module according to an embodiment of the present invention is shown.

[0069] In the specific implementation, for the convenience of illustration and understanding, the embodiment of the present invention aims at figure 1 The structure of the shown backlight module is improved, specifically, figure 1 A backlight unit 1 of the shown backlight module includes four B-type light-emitting chips, and the voltage specification (voltage range) of the B-type light-emitting chip is [2.8V, 2.9V]. Correspondingly, the power supply voltage range of the backlight unit 1 It is [11.2V, 11.6V], that is, the voltage range of the B-type light-...

Embodiment 2

[0082] Figure 4 A schematic diagram of a partial structure of the backlight module according to the embodiment of the present invention is shown. Compared with the first embodiment, the composition and structure of the light-emitting chips inside the backlight unit of the first embodiment of the present invention are different.

[0083] Specifically, in the embodiment of the present invention, each backlight unit includes four light-emitting chips 3, and the types of light-emitting chips 3 in each backlight unit include three types, that is, n=3 is an odd number, and they are respectively Class A (the first Class) light-emitting chips, Class B (second class) light-emitting chips, and Class C (third class) light-emitting chips, according to the formula that n is an odd number, it can be known that the voltage specification of one of the class of light-emitting chips in any one of the backlight units is [ E / n, F / n], that is, the voltage specification of the B-type light-emittin...

Embodiment 3

[0086] Correspondingly, the embodiment of the present invention also provides a method for manufacturing a backlight module, which is characterized in that it includes:

[0087] S101: Backlight module production requires N voltage specifications [E 0 ,F 0 ] light-emitting chip, the voltage specification is [E 0 ,F 0 ] The actual number of light-emitting chips is N 1 ;

[0088] Specifically, the power supply voltage range of any backlight unit is [E, F], and N voltage specifications are required by default as [E 0 ,F 0 ] of light-emitting chips, E 0 =E / N,F 0 =F / N; In actual production, the voltage specification is [E 0 ,F 0 ] The actual number of light-emitting chips is N 1 indivual.

[0089] When N 1 =N, can use figure 1 The structure shown is implemented for production.

[0090] S102: When N 1 When

[0091] When N 1 When 0 ,F 0 ] When the ac...

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PUM

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Abstract

The invention discloses a backlight module and a manufacturing method thereof. The backlight module comprises a substrate and a plurality of backlight units, and the backlight units are arranged on the substrate; any one of the plurality of backlight units comprises N light-emitting chips which are arranged in series, the power supply voltage range of any one of the plurality of backlight units is [E, F], N is greater than or equal to 2, the average power supply voltage range of the light-emitting chips in any one backlight unit is [E0, F0], E0 = E / N, and F0 = F / N; wherein any backlight unit comprises n types of light-emitting chips with different power supply voltage ranges, n is greater than or equal to 2 and less than or equal to N, and the voltage specification of the gth type of light-emitting chip is [Eg, Fg]; the sum of the lower limits of the voltage specifications of the N light-emitting chips in any backlight unit is E, and the sum of the upper limits of the voltage specifications of the N light-emitting chips in any backlight unit is F. According to the backlight module, the light-emitting chips of various voltage specifications are adopted in the backlight unit, and the production cost of the backlight module is reduced under the condition that the backlight requirement is met.

Description

technical field [0001] The invention relates to the field of backlights, in particular to a backlight module and a manufacturing method thereof. Background technique [0002] figure 1 It shows a partial structural schematic diagram of the existing Mini LED backlight module, figure 2 A schematic circuit structure diagram of a backlight unit in an existing Mini LED backlight module is shown. [0003] Existing Mini LED backlight modules generally include a substrate 1 and Mini light-emitting chips 3 arrayed on the substrate 1. When the Mini LED backlight module adopts local backlight dimming technology (Local Dimming), the light on the Mini LED backlight module The chip array will be equally divided into a plurality of backlight units 2, and each backlight unit 2 includes several light emitting chips. [0004] The luminous characteristics of light-emitting chips are closely related to their own current-voltage characteristics. In order to ensure the consistency of light emi...

Claims

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Application Information

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IPC IPC(8): G09G3/34H01L25/075
Inventor 陈均华龚丹雷刘发波闫钟海黄国洪陈翔占有维张雪
Owner FOSHAN NATIONSTAR OPTOELECTRONICS CO LTD