Millimeter Wave Gesture Detection for Transparent Displays
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Solution Overview
Problem
Existing display technologies, such as those using cameras or infrared optical technology, require unshielded openings for gesture detection, affecting the appearance and accuracy of non-contact control of display panels, especially in transparent displays which have low transmittance and are prone to contamination.
Innovation Solution
A display control circuit utilizing a millimeter wave signal transceiver module and gesture detector to accurately detect gestures within a predetermined range around the display panel, allowing for non-contact control without additional openings, using millimeter wave radar technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If camera or infrared optical technology is used for gesture detection, then non-contact control function is achieved, but unshielded openings must be arranged in the outer frame affecting appearance
Solution Approach 1:
The patent replaces camera or infrared optical detection systems with a millimeter wave radar detection system. This substitution eliminates the need for unshielded openings in the display device frame, as millimeter wave signals can penetrate the frame structure without requiring optical paths. The radar system achieves non-contact gesture detection through electromagnetic wave reflection analysis, maintaining the ease of operation while preserving the appearance integrity of the device.
2Ease of operation
If camera or infrared optical technology is used for gesture detection, then non-contact control is enabled, but accuracy of close-in gesture identification is reduced
Solution Approach 1:
The patent changes the detection parameter from optical frequency (camera/infrared) to millimeter wave frequency range. This parameter change enables the detection system to achieve higher precision in identifying close-in gestures, as millimeter wave signals have better resolution for near-field detection compared to optical methods. The system processes reflected millimeter wave signals to accurately determine gesture characteristics, thereby improving measurement precision while maintaining non-contact control functionality.
3Illumination intensity
If transparent display panel with high intensity back light source is used, then display function is provided, but transmittance is low and panel is prone to contamination
Solution Approach 1:
The patent replaces the capacitive touch detection system with a millimeter wave radar detection system. This substitution allows the transparent display panel to maintain high transmittance without requiring high intensity back light sources for gesture detection. The millimeter wave system can detect gestures through the transparent panel without compromising its optical properties, thereby reducing the risk of contamination and maintaining panel reliability.
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 accurate gesture detection and control of display panels, improving appearance and reducing contamination risks, while maintaining a sleek design and enhancing interactive experiences for transparent displays.
Implementation Method 1
a gesture identifying unit including a millimeter wave signal transceiver module and a gesture detector, wherein the millimeter wave signal transceiver module is configured to transmit a first millimeter wave signal and receive a second millimeter wave signal that is reflected back
Data Source
AI summary
A display control circuit, a display control method and a display device are provided. The display control circuit includes a gesture identifying unit and a display control unit. The gesture identifying unit includes a millimeter wave signal transceiver module and a gesture detector. The millimeter wave signal transceiver module is configured to transmit a first millimeter wave signal and receive a second millimeter wave signal that is reflected back. The gesture detector is configured to process and identify the second millimeter wave signal, to detect a gesture within a predetermined range around the display panel. The display control unit is configured to control the display panel based on the gesture.