Infrared Touch Frame Layout for Lower-Cost Large Display Precision
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Solution Overview
Problem
Infrared touch display devices for large-sized displays face challenges in reducing costs while maintaining precise touch operations due to the need for numerous emitting and receiving sensors.
Innovation Solution
An uneven distribution of infrared emitting units in the infrared emitting frame, with higher density in central and edge areas, coupled with a one-to-one or one-to-many correspondence with receiving units, to optimize touch sensitivity and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more infrared emitting sources and receiving sensors are set to realize precise touch operation, then touch precision is improved, but device cost increases
Solution Approach 1:
The patent applies non-uniform distribution of infrared emitting units, with different densities in different regions. The central region has higher density for precise touch operations, while edge regions have lower density, reducing the total number of units needed while maintaining overall touch precision
Solution Approach 2:
The patent uses a combination of one-to-one and one-to-many correspondence between emitting and receiving units. Some emitting units correspond to multiple receiving units, allowing fewer emitting units to achieve the same touch detection capability, thereby reducing cost while maintaining precision
2Reliability
If uniform distribution of infrared emitting units is used, then touch sensitivity is maintained across the screen, but device cost increases
Solution Approach 1:
The patent implements region-specific distribution strategies where the central region uses higher density emitting units for critical touch operations, while peripheral regions use lower density. This local differentiation maintains touch sensitivity where needed while reducing overall component quantity and cost
Solution Approach 2:
The display screen is divided into multiple regions (central region and edge regions) with different emitting unit densities. This segmentation allows optimized resource allocation, maintaining sensitivity in critical areas while reducing costs in less critical areas
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
Enhances touch precision and user experience while reducing the overall cost of the display device by strategically placing infrared emitting units to match touch frequency, thus improving cost-effectiveness.
Implementation Method 1
an infrared touch assembly including an infrared emitting frame and an infrared receiving frame, a plurality of infrared emitting units are fixed in the infrared emitting frame, and a plurality of infrared receiving units are fixed in the infrared receiving frame
Data Source
AI summary
The embodiments of the present disclosure provide a display device, the display device comprising a display module and an infrared touch control assembly, wherein a display surface of the display module is in the shape of a rectangle with an edge extending in a first direction and an edge extending in a second direction, the first direction and the second direction being perpendicular to each other; the infrared touch control assembly comprises an infrared emitting frame and an infrared receiving frame which are arranged oppositely and extend in the first direction; a plurality of infrared emitting units are fixed in the infrared emitting frame; a plurality of infrared receiving units are fixed in the infrared receiving frame; and an orthographic projection of a light-emitting surface of the infrared emitting frame in the display module is positioned in an area outside a display area of the display module.