Display Sheet with Infrared Elements for Contactless Input
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Solution Overview
Problem
Existing touch panel technologies either risk damaging the display surface when pressed, require complex infrared setups, or lack versatility and sanitation in contactless input methods, especially in public use scenarios like ATMs.
Innovation Solution
A display sheet with infrared-light emitting and receiving elements, along with transmitting portions, arranged in a sheet format that forms aerial images when placed on a display, allowing for contactless input detection without the need for dedicated displays or external infrared emitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch panel with pressure sensors is used to detect pressed positions, then input detection is enabled, but the display surface is at risk of damage and contamination from direct contact
Solution Approach 1:
The patent introduces a transparent sheet with light-transmitting portions as an intermediary layer between the display surface and the user's finger. This sheet allows optical detection of touch position while preventing direct contact with the display, thus avoiding damage and contamination. The light-transmitting portions enable the display backlight to pass through for position detection without requiring direct finger-to-display contact.
2Object-affected harmful factors
If infrared light emitting elements and receiving elements are arranged in a matrix on the display to enable contactless detection, then contactless input is achieved, but the device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the infrared detection function from the main display structure by using a separate transparent sheet with light-transmitting portions. Instead of integrating complex infrared matrices into the display, the solution uses a simpler transparent sheet that works with the display's existing backlight, thereby achieving contactless detection without significantly increasing device complexity.
Solution Approach 2:
The patent utilizes the display's existing backlight as the light source for detection, making the display system serve dual purposes: both displaying images and enabling touch detection. This self-service approach eliminates the need for separate infrared light sources and reduces overall system complexity.
3Ease of operation
If light sensors are installed on the front side of the display to detect reflected light from indicating means, then contactless input is enabled, but dedicated displays or external infrared emitters are required, reducing versatility
Solution Approach 1:
The patent creates a universal solution that can be applied to any display by using a transparent sheet with light-transmitting portions that works with the display's existing backlight. This multi-functional approach allows the same transparent sheet structure to enable both image display and touch detection across different display types, enhancing versatility and adaptability.
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
Enables reliable and accurate detection of input positions without direct contact with the display surface, reducing the risk of damage and complexity, while maintaining versatility and sanitation standards.
Implementation Method 1
a plurality of infrared-light emitting elements emitting infrared light from on the display to a space
Implementation Method 2
a plurality of infrared-light receiving elements receiving infrared light proceeding to the display from the space
Implementation Method 3
a plurality of transmitting portions passing light emitted from the display to the space
Data Source
Figure 1(A)~1(B)
Figure 2
Figure 3(A)~3(B)
AI summary
A display sheet 10 according to the present invention is to be used while being placed on a display 11, and includes: infrared-light emitting elements 15 that emit infrared light from on the display 11 to a space; infrared-light receiving elements 16 that receive infrared light proceeding to the display 11 from the space; and transmitting portions 17 that passes light emitted from the display 11 to the space. The infrared-light emitting elements 15, the infrared-light receiving elements 16, and the transmitting portions 17 are formed into a sheet in a state of being arranged side by side or arranged to be scattered. Merely by placing the display sheet 10 on the display 11 and teaming them with an optical image-forming means, an aerial-image-forming type input device can be obtained with no need of separately preparing a dedicated display or infrared-light emitter. Thus, it is excellent in versatility.