Laser Sensor Touch Control for Non-Touch Displays
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Solution Overview
Problem
Existing display devices without touch functions require costly replacement of the display screen to implement touch functionality, leading to high costs and inefficiencies.
Innovation Solution
A touch control method using a laser sensor to receive reflection signals, generate images, acquire user gesture information, and execute control operations, allowing for the realization of touch functions on non-touch screens without replacing the display screen, utilizing a processor and memory to execute the touch control program.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display screen is replaced to implement touch functions, then touch functionality is achieved, but cost increases significantly
Solution Approach 1:
The display screen is made multi-functional by adding a laser sensor system that enables touch gesture detection without replacing the original display. The system can detect multiple gesture types (swiping, clicking, long-pressing, etc.) and execute corresponding control operations, allowing the display to serve both visual output and touch input functions simultaneously.
Solution Approach 2:
A laser sensor is introduced as an intermediary component between the user and the display system. The laser sensor emits laser signals, receives reflection signals from user gestures, and converts them into control operations. This intermediary enables touch functionality without requiring replacement of the existing display screen.
2Adaptability or versatility
If a laser sensor system is added to enable touch functions, then touch control capability is achieved, but device complexity increases
Solution Approach 1:
The laser sensor, signal processing unit, and gesture recognition algorithms are merged into an integrated touch control system. The processor integrates the laser signal reception, image generation, gesture information extraction, and control operation execution into a unified processing flow, reducing the need for separate complex subsystems.
3Speed
If gesture information is processed in real-time, then response speed is improved, but processing accuracy may be compromised
Solution Approach 1:
The system performs preliminary actions by generating images from laser and reflection signals, deleting pixels beyond preset areas, and acquiring action areas before final gesture recognition. This pre-processing of image data prepares the information in advance, enabling faster and more accurate gesture detection when control operations are executed.
Solution Approach 2:
The system uses feedback mechanisms by acquiring multiple images within a preset time interval, determining action areas based on adjacent images, and calculating centroids to refine gesture information. This iterative feedback process improves recognition accuracy while maintaining real-time response capability.
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 low-cost and fast-response touch functionality on non-touch screens by processing reflection signals from a laser sensor to determine user gestures and execute corresponding control operations, reducing the need for screen replacement.
Implementation Method 1
after a reflection signal being received by means of a receiving component of a laser sensor, generating an image according to a laser signal and the reflection signal
Data Source
AI summary
Disclosed is a touch control method for a display. The method includes: after a reflection signal is received by means of a receiving component of a laser sensor, generating an image according to a laser signal and the reflection signal; acquiring gesture information of a user according to the image; and executing a control operation corresponding to the gesture information. Further disclosed are a terminal device and a computer-readable storage medium.