A key light guide cover and a light guide key assembly

By designing a light guide cover with a thickness difference between the light-transmitting area and the backlight area in the light guide button assembly, the problem of light leakage caused by light interference effect is solved, improving the visibility and reliability of the button.

CN224355155UActive Publication Date: 2026-06-12GUIYANG YONGQING INSTR TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUIYANG YONGQING INSTR TECH CO LTD
Filing Date
2025-07-30
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

In existing light guide button components, the interference effect of light between the backlight area and the light-transmitting area causes light leakage, which affects the user's visual observation and may lead to misoperation.

⚗Method used

Design a button light guide cover where the thickness of the light-transmitting area is smaller than that of the backlight area. The thickness difference between the light-transmitting and backlight areas results in a shorter propagation path and lower brightness loss for the light source in the light-transmitting area, while the reflected light has a longer propagation path and higher brightness loss in the backlight area, thus reducing interference effects.

🎯Benefits of technology

It enhances the brightness of the light-transmitting area, improves the user's visual experience, reduces the risk of misoperation, avoids the interference effect of reflected light, and ensures that the user observes the correct text or pattern.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a kind of key light guide cover and light guide key assembly, key light guide cover includes base body, pressure-bearing body and support body, support body is fixedly connected between base body and pressure-bearing body, and the relative height between the front of pressure-bearing body and the front of base body is greater than zero, the front of pressure-bearing body includes light transmission area and backlight area, and the thickness of backlight area is greater than the thickness of light transmission area.Light guide key assembly includes aforementioned key light guide cover and light source.The utility model discloses technical scheme, because the thickness of backlight area is greater than the thickness of light transmission area, the light propagation path of light source generated light is shorter in light transmission area, and the intensity and brightness loss of light are lower, so as to enhance light transmission area brightness effect, and the light propagation path of light source generated light is longer in backlight area, so that the intensity and brightness of reflected light are weakened, the interference effect of reflected light and light propagation in light transmission area is reduced, light is reduced, so that user observes correct character or pattern from light transmission area, and misoperation to key is avoided.
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