Photosensitive Touch Display with Laser Trajectory Tracking
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Solution Overview
Problem
Current liquid crystal display devices struggle to meet the multi-functional requirements of providing a touch control function and a visual effect of a laser pointer in conference and educational settings, failing to integrate these features effectively.
Innovation Solution
A photosensitive color-changing touch control display device is developed, comprising a display panel, a photosensitive touch control panel with photoresistors and touch control electrodes, a driving chip, and a central processing unit. The device changes color in response to resistance changes caused by laser irradiation, allowing for real-time tracking of a laser pointer's trajectory while enabling touch control functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional TV display modules are used, then the display function is achieved, but the multi-functional requirements (touch control and laser pointer visual effect) cannot be met simultaneously
Solution Approach 1:
The patent merges three separate functions (display, touch control, and laser pointer detection) into a single integrated display panel. The display panel incorporates both touch control electrodes and photoresistors on the same substrate, allowing it to simultaneously perform display, touch sensing, and laser pointer trajectory visualization without requiring separate devices.
Solution Approach 2:
The display panel is designed as a universal component that performs multiple functions: it displays visual information, detects touch inputs through touch control electrodes, and tracks laser pointer trajectories through photoresistors. This multi-functional design eliminates the need for separate TV display modules, touch screens, and laser pointer receivers.
2Adaptability or versatility
If photoresistors and touch control electrodes are integrated on the same layer, then the multi-functional requirement is met, but the manufacturing complexity increases
Solution Approach 1:
The display panel is segmented into distinct functional regions: display regions with liquid crystal molecules, touch control regions with transparent electrodes, and photoresistor regions with light-sensitive materials. Each region is optimized for its specific function while being manufactured on the same substrate, allowing for specialized processing techniques for each component type.
Solution Approach 2:
The display panel uses composite material structures, including transparent conductive oxides for touch electrodes, photoresistive materials for laser detection, and liquid crystal materials for display. These composite materials are deposited and processed in an integrated manufacturing sequence, combining different material properties in a single panel structure.
3Illumination intensity
If the display panel responds to laser irradiation by changing color, then the laser pointer visual effect is achieved, but the response time and precision depend on the photoresistor sensitivity
Solution Approach 1:
The photoresistors exhibit parameter changes in their electrical resistance in response to light intensity variations from the laser pointer. When the laser irradiates the photoresistor, its resistance changes, which is detected by the driving chip and processed by the central processing unit to determine the laser's position and trajectory on the display surface.
Solution Approach 2:
The system implements a feedback mechanism where the driving chip continuously monitors the resistance changes of the photoresistors and the capacitance changes of the touch control electrodes. This real-time feedback allows the central processing unit to accurately track the laser pointer's movement and generate appropriate visual effects on the display panel, ensuring both response speed and positioning precision.
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
The solution enables multifunctional applications in conference and educational settings by providing wide-angle visibility, effective touch control, and visual feedback of a laser pointer's trajectory, enhancing interaction and teaching capabilities.
Implementation Method 1
a photosensitive color-changing touch control panel, a driving chip and a central processing unit; wherein, when a resistance of the photoresistor changes, the driving chip transmits the obtained current change signal
Data Source
AI summary
A photosensitive color-changing touch control display device includes a display panel, a photosensitive color-changing touch control panel, a driving chip, and a central processing unit. The photosensitive color-changing touch control panel includes a plurality of touch control electrodes and a plurality of photoresistors. When a resistance of the photoresistor changes, the driving chip transmits the obtained current change signal to the central processing unit, and the central processing unit controls the display panel corresponding to a region where a current change occurs to change color.