Backlight module for luminous keyboard

By combining a light board, a light guide plate, and a light shield, and utilizing colored material coating and a through-channel design, the heat dissipation and multi-color light effects of the backlit keyboard were solved, achieving color light output, simplifying the manufacturing process, and reducing costs.

CN121709461APending Publication Date: 2026-03-20HUAIAN DARFON ELECTRONICS +1
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Patent Information

Application Number
CN202510229157.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-09-18
Filing Date
2025-02-28
Publication Date
2026-03-20

AI Technical Summary

Technical Problem

Existing backlit keyboards suffer from significant heat dissipation issues in their thin design, and achieving various lighting effects requires complex manufacturing processes and high costs.

Method used

The device employs a combination structure of a light panel, a light guide plate, and a light shield. By setting a colored material coating and a through-channel in the button gap area, the light guide plate guides the light and the colored material coating changes the light color to achieve a colored light output effect. At the same time, the device is designed with light-reducing and diffusion patterns around the through-channel to improve heat dissipation efficiency.

Benefits of technology

It achieves colored light output for backlit keyboards without requiring multiple light-emitting units, improving heat dissipation efficiency, simplifying the manufacturing process, and reducing costs.

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Abstract

The invention relates to a backlight module for a light-emitting keyboard, the light-emitting keyboard comprises a first key and a second key, and a key gap area is arranged between the first key and the second key. The backlight module for the luminous keyboard comprises a shading plate, a light guide plate and a lamp plate which are stacked from top to bottom. The lamp panel has a light-emitting unit. The light shielding plate is provided with a light reducing pattern corresponding to the first key so as to shield light. The backlight module is provided with a colored material covering layer, and the colored material covering layer is arranged on the shading plate or the light guide plate and overlapped in the key gap area in the longitudinal direction. Light of the light-emitting unit is guided by the light guide plate to pass through the side of the dimming pattern and emit first colored light upwards from the internal light-transmitting area of the first key. Light of the light-emitting unit is guided by the light guide plate to pass through the colored material coating and emit second colored light different from the first colored light upwards from the inner light-transmitting area and the boundary of the second heat dissipation key. The backlight modules corresponding to some keys on the luminous keyboard are provided with the colored material coatings, so that the luminous keyboard has the special effect of colored light emission.
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