Light-Emitting Keyboard Side Surface Reflector Brightness
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Solution Overview
Problem
Conventional light-emitting keyboards suffer from light loss due to reflections occurring outside the light guide plate, leading to reduced overall brightness and lighting efficiency.
Innovation Solution
The implementation of a second reflector on the side surface of the light guide plate, in conjunction with a first reflector on the bottom surface, ensures that all light is efficiently reflected back into the plate, enhancing brightness and efficiency. Additionally, a shielding layer and via holes can be used to further optimize light distribution and reduce energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional light guide plate is used with only bottom surface reflector, then the structure is simple, but light is lost through the side surface reducing overall brightness
Solution Approach 1:
The patent converts the harmful light loss through the side surface into a beneficial effect by introducing a side surface reflector that captures the escaped light and redirects it back into the light guide plate, transforming energy loss into useful illumination
Solution Approach 2:
The patent divides the reflector into two separate functional components: a bottom surface reflector and a side surface reflector, allowing each to optimize light reflection in its specific direction and collectively improve overall light utilization efficiency
2Illumination intensity
If light source intensity is increased to compensate for light loss, then brightness is improved, but power consumption increases
Solution Approach 1:
The patent changes the optical parameters of the system by introducing reflective surfaces with specific reflectivity characteristics, improving light utilization efficiency without requiring an increase in light source intensity or power consumption
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration increases the average brightness by 32% compared to conventional keyboards, allowing for reduced light source intensity or quantity without sacrificing brightness, thereby lowering power consumption and manufacturing costs.
Implementation Method 1
a beam 122 emitted from the LED 120 will enter the light guide plate 110 through the light entrance surface 112 and then being reflected repetitively inside the light guide plate 110 until a beam 122a conforming with the breaking down of total reflection is formed and thus being discharge out of the light guide plate 110 through the light emitting surface 114
Implementation Method 2
the reflector 140 is arranged at a position for enabling the same to reflect the beam 122b back to the light guide plate so as to prevent the loss of energy
Data Source
AI summary
A light-emitting keyboard is disclosed, which comprises: a light guide plate, configured with a light entrance surface, a light emitting surface, a bottom surface and a side surface in a manner that the light emitting surface is arranged opposite to the bottom surface, and the light entrance surface and the side surface are arranged respectively next and connecting to the light emitting surfaced and the bottom surface while being sandwiched therebetween; a light source, disposed next to the light entrance surface of the light guide plate; a frame, disposed on the light emitting surface of the light guide plate; a first reflector, disposed on the bottom surface of the light guide plate; and a second reflector, disposed on the side surface of the light guide plate. With the aforesaid structure, light from the light source can be fully utilized so that the overall brightness of the light-emitting keyboard can be enhanced.