降低光损的导光板
By setting a subwavelength grating and a gradient refractive index layer on the light-incident surface of the light guide plate, and adding microparticle structures inside, the problem of high light loss of the light guide plate is solved, and efficient light coupling and uniform light output are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING YEAHLIGHT OPTOELECTRONICS TECH CO LTD
- Filing Date
- 2026-05-20
- Publication Date
- 2026-07-17
AI Technical Summary
Existing light guide plates suffer from significant light loss when light enters, especially due to Fresnel reflection loss and mode miscoupling caused by abrupt changes in refractive index, resulting in low light input efficiency.
A subwavelength grating is set on the light-incident surface of the light guide plate, and a gradient refractive index layer is covered on its outer side. Combined with the internal microparticle structure, the wave vector matching and propagation mode of the light are controlled by the gradient refractive index and grating structure, thereby reducing interface reflection and scattering loss.
It significantly improves the incident coupling rate and internal propagation efficiency of light, reduces light loss, and enhances the overall light output rate and brightness uniformity of the light guide plate.
Smart Images
Figure CN122218875B_ABST