Texture Detection Circuit Optical Energy Utilization
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Solution Overview
Problem
Existing touch display panels face challenges in efficiently utilizing optical energy for fingerprint detection and reducing the reliance on external power sources, particularly in mobile terminals where energy endurance is a concern.
Innovation Solution
A texture detection circuit and charging circuit configuration that utilizes a photosensitive element connected to a switching sub-circuit, allowing for optical signals to be converted into electrical energy, which is then stored and used for both texture detection and charging, thereby improving the utilization rate of the photosensitive element and reducing external power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the photosensitive element is used solely for fingerprint detection, then the detection function is simple and reliable, but the optical energy is not fully utilized and external power is required
Solution Approach 1:
The photosensitive element is designed to perform multiple functions: fingerprint detection and power generation. By adding a switching sub-circuit that can connect the photosensitive element to either the signal readout line (for detection) or the charging sub-circuit (for power generation), the system achieves multi-functionality without requiring separate components, thus improving optical energy utilization while controlling complexity.
Solution Approach 2:
The switching sub-circuit dynamically changes the connection state of the photosensitive element based on operational needs. During fingerprint detection, it connects to the signal readout line; during charging mode, it connects to the charging sub-circuit. This dynamic switching enables the system to adapt between different functions, resolving the contradiction between simple detection and energy utilization.
2Adaptability or versatility
If a switching sub-circuit is added to enable charging function, then optical energy utilization improves, but the device complexity increases
Solution Approach 1:
The switching sub-circuit serves as a universal control mechanism that enables the photosensitive element to function in multiple modes (detection and charging). This single added component provides dual functionality, improving adaptability while minimizing the increase in overall system complexity.
Solution Approach 2:
The patent combines the fingerprint detection function and power charging function into a single integrated circuit system. The switching sub-circuit merges the control of both functions, allowing the photosensitive element to serve both purposes through one unified structure rather than requiring separate independent systems.
3Reliability
If the photosensitive element is continuously connected to the signal readout line, then detection accuracy is maintained, but energy consumption increases and charging capability is lost
Solution Approach 1:
The switching sub-circuit dynamically switches the connection state of the photosensitive element between the signal readout line and the charging sub-circuit based on operational requirements. This dynamic switching ensures that the photosensitive element is only connected to the signal readout line when detection is needed, maintaining detection reliability while reducing unnecessary energy consumption and enabling charging capability during non-detection periods.
Solution Approach 2:
The system employs periodic switching between detection mode and charging mode. During detection periods, the photosensitive element connects to the signal readout line for accurate fingerprint detection; during non-detection periods, it switches to the charging sub-circuit for power generation. This periodic action maintains detection reliability when needed while optimizing energy consumption and enabling charging.
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 configuration enhances the utilization rate of optical energy, reduces the need for external power, and improves the energy endurance of mobile terminals by effectively converting and storing optical energy for use in touch display panels.
Implementation Method 1
the first photosensitive element converts a detected optical signal into an electrical signal
Data Source
AI summary
A texture detection circuit, a charging circuit, driving methods and a touch display panel are provided. The texture detection circuit includes a first photosensitive element and a switching sub-circuit. A first electrode of the first photosensitive element is connected with a signal readout line. A second electrode of the first photosensitive element is connected with the switching sub-circuit. The switching sub-circuit is connected with a reverse power end and a charging sub-circuit, and is configured to switch a connection state of the second electrode of the first photosensitive element between a first connection state and a second connection state. The first connection state is a state in which the second electrode of the first photosensitive element is connected with the reverse power end. The second connection state is a state in which the second electrode of the first photosensitive element is connected with the charging sub-circuit.