Frame-Mounted Infrared Touch Control for Large Displays
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Solution Overview
Problem
Conventional touch screen technologies for large display devices are costly and prone to deformation, leading to reduced functionality due to the short distance between conductive layers, which results in a short lifespan and difficulty in implementation.
Innovation Solution
A display device with a frame-mounted infrared or ultrasonic transmitter and receiver system along the edges, where transmitters are activated sequentially to detect obstacles using reflected beams, allowing for precise touch control and adjustment of display parameters without additional screen layers, reducing the frame thickness and enhancing user comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional conductive layers are implemented onto the display for touch control, then touch control functionality is achieved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent extracts the touch control functionality from the display screen itself and relocates it to the frame surrounding the screen. By placing transmitters and receivers on the frame rather than incorporating layers into the screen, the touch control function is separated from the display manufacturing process, thereby reducing manufacturing complexity while maintaining functionality
Solution Approach 2:
The patent introduces an intermediary frame structure that houses the transmitters and receivers. This frame acts as a mediator between the user and the display, enabling touch control functionality without requiring modifications to the display screen itself, thus avoiding the complexity of integrating conductive layers into the screen
2Adaptability or versatility
If additional conductive layers are added to large displays for touch control, then touch control is enabled, but the layers deform easily due to large size, reducing reliability
Solution Approach 1:
The patent removes the touch control layers from the large display screen and relocates the sensing mechanism to the frame. This extraction eliminates the problem of layer deformation in large displays, as the frame-mounted transmitters and receivers are not subjected to the same mechanical stresses and deformation risks as screen-integrated layers
Solution Approach 2:
The patent replaces the mechanical contact-based resistive touch system with an optical or electromagnetic field-based detection system. By using transmitters and receivers that detect changes in the electromagnetic field or light patterns caused by touch, the system eliminates the need for physical contact between conductive layers, thereby preventing deformation and improving reliability
3Area of stationary object
If the distance between touch screen layers is reduced to enable large display area, then larger display size is achieved, but touch functionality is lost due to insufficient layer separation
Solution Approach 1:
The patent extracts the touch detection mechanism from the screen area and places it in the frame. This allows the entire screen area to be used for display purposes without compromising touch functionality, as the transmitters and receivers are positioned outside the active display area in the frame structure
Solution Approach 2:
The patent moves the touch control system from a two-dimensional plane (layers on the screen surface) to a three-dimensional arrangement (transmitters and receivers positioned in the frame at different spatial locations). This dimensional change allows for sufficient separation between sensing elements while maintaining large screen area
4Adaptability or versatility
If conventional resistive touch layers are implemented on large displays, then touch control is achieved, but the layers deform over time causing random touches and short lifespan
Solution Approach 1:
The patent replaces the mechanical contact system with an electromagnetic field-based detection system. The transmitters emit electromagnetic fields or light patterns that are detected by receivers, and touch is detected through changes in these fields rather than physical contact between layers. This eliminates mechanical wear and deformation, significantly extending the system's operational lifespan
Solution Approach 2:
The patent introduces electromagnetic fields or light as an intermediary between the user's touch and the detection system. Instead of direct mechanical contact between conductive layers, the touch interaction is mediated through changes in the electromagnetic field or light patterns caused by the user's presence or contact, eliminating mechanical stress and extending durability
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 solution provides durable, long-life touch control functionality without altering the screen, enhances user comfort by adjusting backlight and audio settings, and meets aesthetic needs by minimizing frame thickness, while maintaining precise touch detection and control.
Implementation Method 1
at least two transmitters (1) (infrared or ultrasonic transmitters), which generate infrared light beam or ultrasonic signal beam... Said receivers (2) detect the beams originating from the transmitters (1) if the beam is reflected from an obstacle (0)
Data Source
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AI summary
The present invention discloses a display device (D) with touch control feature, which comprises at least one screen (S), a frame (F) into which the screen (S) is fitted; at least two transmitters (1) located on one edge (F1) of the frame (F); at least one receiver (2) located next to the said transmitters (1) on the same edge (F1) of the frame (F); at least one scanning means which sequentially activates the transmitters (1), detects a sense signal level of receivers (2), activates an on screen menu which is used for adjustment of display parameters, when obstacle (O) becomes proximate to the screen (S) and which detects the position of obstacle (O) when obstacle (O) is in contact with the screen (S).