Infrared Touch Assembly Edge Mounting for Display Devices
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Solution Overview
Problem
Current infrared touch whiteboards experience poor writing experiences due to high touch heights, which result in ineffective signal emission and reception, and require complex and costly adhesive solutions for assembly.
Innovation Solution
A display device design that incorporates a transparent cover plate, a display panel, a frame assembly, and an infrared touch assembly, where the frame assembly includes a light filtering strip with a buffer part and a resisting part, reducing the touch height and improving the writing experience without the need for adhesive layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lamp bead height is increased to ensure effective signal emission and reception, then the infrared touch function is improved, but the touch height becomes too high resulting in poor writing experience
Solution Approach 1:
The patent changes the spatial arrangement from vertical stacking (lamp bead above glass) to a lateral arrangement where the infrared assembly is positioned at the edge of the transparent cover plate. This dimensional change allows the infrared emitter and receiver to be positioned close to the writing surface without requiring the lamp bead to be elevated, thus maintaining effective signal transmission while keeping the touch height low for better writing experience.
2Reliability
If adhesive layers are used to fix the transparent cover plate, then the assembly reliability is improved, but the assembly complexity and cost increase
Solution Approach 1:
The patent replaces the chemical bonding method (adhesive layers) with a mechanical fixing system. The frame assembly includes a clamping structure that mechanically secures the transparent cover plate through physical constraint, eliminating the need for adhesive layers. This substitution simplifies the assembly process, reduces cost, and maintains assembly reliability through the mechanical clamping force.
Data Source
AI summary
The present disclosure provides a display device. The display device includes a transparent cover plate, a display panel, a frame assembly and an infrared touch assembly. The frame assembly includes an outer frame and a light filtering strip. The light filtering strip is provided with a light filtering part that presses at a front side edge of the transparent cover plate. The outer frame includes an outer frame body, a front frame wall and a rear frame wall. An outer side end of the front frame wall is connected to the outer frame body. An inner side end of the front frame wall presses on a front side surface of the light filtering part. An outer side end of the rear frame wall is connected to the outer frame body. The infrared touch assembly is fixed between the front frame wall and the rear frame wall.