Light-Emitting Touch Panel Structure Without Stacked Light Guides
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Solution Overview
Problem
Traditional light-emitting touch panels require multiple layers of light guide plates to display various graphics, leading to increased thickness and hindering the configuration of electronic devices.
Innovation Solution
A light-emitting touch panel design that eliminates the need for light guide plates by directly assembling light-emitting elements and a shading plate on a circuit board, with a cover plate and optional diffusion sheet, allowing for direct light emission and independent control of light states and sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple layers of light guide plates are used to display various graphics, then the display functionality is improved, but the thickness of the touch panel increases
Solution Approach 1:
The patent combines multiple light guide plates into a single integrated structure with a unified light source layer. Instead of stacking separate light guide plates for different graphics, the invention merges their functions into one layer that can display multiple types of graphics through a single light source, thereby reducing thickness while maintaining display versatility.
Solution Approach 2:
The light guide plate is designed to perform multiple functions simultaneously - it serves as both the light guide structure and the graphic display element. The single light guide plate can display different types of graphics (numeric keys, function keys, etc.) through various light emission patterns, eliminating the need for multiple specialized light guide plates.
2Adaptability or versatility
If multiple layers of light guide plates are stacked to display different graphics, then the variety of input functions is improved, but the overall structure becomes more complex
Solution Approach 1:
The patent merges multiple light guide plate layers into a single integrated light guide structure. This unified structure contains all necessary graphic patterns and light guiding paths, eliminating the complexity of stacking and aligning multiple separate layers while maintaining the ability to display various input function graphics.
Solution Approach 2:
Within the single light guide plate, different graphic regions are segmented and independently controllable. The light guide plate is divided into multiple functional zones (numeric key areas, function key areas, etc.) that can be activated independently, providing variety in input functions without requiring multiple physical layers.
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 significantly reduces the thickness of the touch panel while enabling a wider range of input functions through controlled light patterns, enhancing the functionality and usability of electronic devices.
Implementation Method 1
Light emitted by the light-emitting elements passes through the light-transmitting region, and a bright region is formed on a top surface of the cover plate away from the shading plate
Data Source
AI summary
A light-emitting touch panel includes a circuit board, a plurality of light-emitting elements, a shading plate and a cover plate. The light emitting element has a first height in a first direction. The shading plate has a plurality of spacing regions corresponding to the light emitting elements, respectively. A first width is provided between two partition walls of each spacing region in a second direction. Each partition wall has a second height in the first direction, and the second height is greater than the first height. The cover plate has a light-transmitting region, the light emitted by the light-emitting elements passes through the light-transmitting region, and a bright region is formed on the top surface of the cover plate away from the shading plate, wherein a second width of the bright region in the second direction is related to the second height and the first width.