Infrared Light Guide for Touch Display Remote Reception
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Solution Overview
Problem
Existing touch input systems with liquid crystal displays face challenges in effectively receiving infrared light for remote operation due to limitations in light-receiving performance, particularly when external operation devices emit infrared light at large angles or from the center of the display.
Innovation Solution
The integration of an infrared light guide within the touch input device, which overlaps with the display device's frame, guides infrared light emitted from external operation devices to a light receiver, enhancing light-receiving performance by using reflective members and a diffusive third region to ensure wide-angle and central light reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light receiver is disposed on the frame to receive infrared light, then the light-receiving performance is improved, but the structure becomes more complex and the manufacturing difficulty increases
Solution Approach 1:
An infrared light guide is introduced as an intermediary component between the external operation device and the light receiver. The light guide includes a light incident portion that receives infrared light and a light guide portion that transmits the light to the light receiver, thereby improving light-receiving performance while maintaining a relatively simple overall structure through modular design
Solution Approach 2:
The infrared light guide extends in the thickness direction of the touch input device, utilizing the third dimension to guide light from the front surface to the light receiver. This dimensional approach allows effective light guidance without increasing planar complexity
2Strength
If the touch input device is attached to cover the display, then the display is protected, but the infrared light reception is blocked
Solution Approach 1:
The frame body is designed with differentiated regions: a first region that covers the display for protection and a second region that is transparent or translucent to allow infrared light transmission. This local quality differentiation enables simultaneous achievement of display protection and infrared light reception
Solution Approach 2:
The infrared light guide acts as a mediator that channels infrared light through the frame body structure, enabling the frame to simultaneously provide mechanical protection and optical transmission functionality through the integrated light guide system
3Adaptability or versatility
If the infrared light guide is designed to guide light from all directions, then the light-receiving angle is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The light incident portion of the infrared light guide is designed with a curved or dome-shaped surface that facilitates light collection from multiple directions. This spherical curvature enables wide-angle light reception while maintaining manufacturability through standard molding techniques
Solution Approach 2:
The infrared light guide is integrated as part of the touch input device assembly, utilizing the existing structural components and attachment mechanisms. This self-service approach reduces the need for separate high-precision alignment procedures during manufacturing
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 configuration significantly improves light-receiving performance by ensuring that infrared light is efficiently guided to the light receiver, even when emitted at large angles, thereby enhancing the overall input capabilities of the touch input display system.
Implementation Method 1
an infrared light guide (40). The frame body (32) has the infrared light guide (40)
Implementation Method 2
using reflective members and a diffusive third region to ensure wide-angle and central light reception
Data Source
AI summary
A touch input display system includes a display device and a touch input device. The display device includes a display, a frame enclosing the display, and a light receiver that receives infrared light emitted from an external operation device. The touch input device has a touch inputter and a frame body that encloses the touch inputter. The touch input device is attached to the display such that the frame body overlaps on a front side of the frame. The frame body has an infrared light guide. The infrared light guide guides infrared light emitted from the external operation device to the light receiver.