Luminous Keyboard Backlight Layout for Thin, Leak-Free Illumination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional keyboards face challenges in reducing thickness and production cost while maintaining luminous functionality, particularly in notebook computers where thickness significantly impacts overall device thickness.
Innovation Solution
A backlight module design incorporating a light guide plate with an escape opening, where electronic components are embedded, and a reflective sheet extends into the opening to prevent light leakage, combined with a light-emitting component and light-shielding sheet configuration to minimize thickness and enhance light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electronic components are arranged separately from the light guide plate, then ease of manufacture is improved, but thickness of the backlight module increases
Solution Approach 1:
The patent combines the electronic component arrangement with the light guide plate structure by creating escape openings in the light guide plate that accommodate electronic components. The circuit board is integrated into the light guide plate assembly, with electronic components positioned within the escape openings, merging two previously separate functions into a unified structure that reduces overall thickness.
Solution Approach 2:
The patent implements nesting by placing electronic components within the escape openings of the light guide plate. The circuit board is nested within the light guide plate structure, and the reflective sheet is positioned between the light guide plate and circuit board, creating a nested arrangement where multiple components occupy overlapping spatial volumes, thereby reducing the overall thickness of the assembly.
2Length of stationary object
If the keyboard structure is simplified to reduce thickness, then thickness is reduced, but light leakage control becomes more difficult
Solution Approach 1:
The patent applies local quality by positioning the reflective sheet specifically in the region between the light guide plate and circuit board, and extending it into the escape openings. This localized placement of the reflective sheet provides targeted light reflection precisely where needed to prevent leakage from escape openings, while the rest of the structure maintains its simplified thin design without unnecessary components.
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 design effectively reduces the thickness of luminous keyboards by embedding electronic components within the light guide plate and prevents light leakage, thereby improving the keyboard's slim profile and production efficiency.
Implementation Method 1
The reflective sheet is disposed on a rear surface of the light guide plate and between the light guide plate and the circuit board, and the reflective sheet extends into the escape opening
Implementation Method 2
The light guide plate includes an escape opening. The circuit board is disposed under the light guide plate. The electronic component is disposed on the circuit board, and at least a part of the electronic component is located in the escape opening
Implementation Method 3
The light-shielding sheet is disposed on the light-emitting surface of the light guide plate opposite to the rear surface
Data Source
AI summary
A backlight module including a light guide plate, a circuit board, an electronic component, a reflective sheet, a light-shielding sheet, and a light-emitting component is provided. The light guide plate includes an escape opening and a light-source opening. The circuit board is disposed under the light guide plate. The electronic component is electrically connected to the circuit board, and at least a part of the electronic component is located in the escape opening. The reflective sheet is disposed on a rear surface of the light guide plate and between the light guide plate and the circuit board. The light-shielding sheet is disposed on a light emitting surface of the light guide plate opposite to the rear surface. The light-emitting component is disposed in the light-source opening. A luminous keyboard using this backlight module is also provided.