Infrared Touch Display Screen Frame Thickness Reduction
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Solution Overview
Problem
Current infrared touch display screens have a thick frame due to the arrangement of the infrared touch circuit board assembly and light-filter strip, leading to increased distance between the touch region and the display screen, resulting in false touches and an aesthetically unpleasing design.
Innovation Solution
The infrared touch display screen design integrates a frame with a first portion for mounting the light-filter strip and a second portion for the circuit board assembly, where the light-filter strip is connected to the frame on one side and the protective layer on the other, reducing the overall thickness and distance between the frame and display screen, with infrared lamp tubes oriented parallel to the protective layer to enhance touch accuracy and visual appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the infrared touch circuit board assembly and light-filter strip are fixed to the frame using conventional mounting methods, then the structural stability is ensured, but the frame thickness increases and the distance between the touch region and display screen exceeds 3mm
Solution Approach 1:
The patent repositions the infrared lamp tubes from a conventional side-mounted arrangement to a front-mounted arrangement on the circuit board assembly. This dimensional change allows the infrared light source to be closer to the display screen surface, reducing the touch region distance to 3mm or less while maintaining structural stability through the integrated circuit board mounting structure.
Solution Approach 2:
The patent integrates the infrared lamp tubes directly onto the circuit board assembly, merging the infrared light source with the control electronics. This consolidation eliminates the need for separate mounting structures and reduces the overall frame thickness while ensuring both the infrared emission function and circuit board stability are maintained.
2Manufacturing precision
If the circuit board is arranged at the front side of the infrared lamp tubes to reduce the distance to the display screen, then the touch accuracy improves, but the distance from the front side of the frame to the front side of the display screen exceeds 7mm
Solution Approach 1:
The patent positions the infrared lamp tubes at the front surface of the circuit board assembly, oriented parallel to the protective layer. This dimensional repositioning reduces the front-to-front distance to 7mm or less while maintaining the 3mm or less distance between the infrared light source and the display screen, achieving both compact form factor and accurate touch response.
3Shape
If the frame thickness is reduced to improve appearance and reduce weight, then the visual experience and aesthetics improve, but the structural stability and mounting reliability may be compromised
Solution Approach 1:
The patent combines the infrared lamp tubes with the circuit board assembly into an integrated unit. This merging eliminates the need for thick separate mounting structures and brackets, allowing the frame to be thinner and more aesthetically pleasing while the integrated circuit board provides sufficient structural support for reliable mounting of all 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 reduces the thickness of the frame, minimizing the distance between the touch sensing region and the display screen, thereby improving touch accuracy and user experience while providing a more aesthetically pleasing appearance.
Implementation Method 1
The circuit board assembly includes a circuit board and infrared lamp tubes
Data Source
Figure 1~2
Figure 3
AI summary
The present application provides an infrared touch display screen, including a frame, a display panel assembly, a light-filter strip and a circuit board assembly. The display panel assembly includes a protective layer, the circuit board assembly includes a circuit board and infrared lamp tubes arranged on the circuit board, the frame includes a first portion for mounting the light-filter strip and a second portion for mounting the circuit board assembly, the first portion is located at a front side of the protective layer, the second portion is located outside the protective layer and the first portion, a front side of the light-filter strip is connected with the first portion, and a back side of the light-filter strip abuts against the protective layer; the circuit board corresponds to a position of the protective layer in a front-back direction, the infrared lamp tubes correspond to a position of the light-filter strip in the front-back direction, and an extending direction of the infrared lamp tubes is parallel to the protective layer. The infrared touch display screen can reduce a height of a touch sensing region and reduce the possibility of false touch; at the same time, an overall thickness of the frame can be reduced, so that a thickness of a space on the front side of the protective layer can be reduced, and an overall appearance can be more beautiful.