Array Substrate Temperature Compensation for Display Recognition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Photoelectric detection circuits in display devices, such as photodiodes, are susceptible to temperature variations, leading to inaccurate light detection results due to different current responses at varying temperatures, which affects the accuracy of fingerprint recognition, iris recognition, and face recognition functions.
Innovation Solution
Incorporating a temperature detection circuit on the array substrate, which includes a temperature sensitive diode, to detect temperature and correct the light detection results, thereby improving the accuracy of light detection and preventing temperature-induced errors without affecting the photosensitive performance or area of the photodiode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a photoelectric detection circuit is integrated on the array substrate to detect light for imaging, then the display device can realize fingerprint recognition, iris recognition, and face recognition functions, but the detection accuracy deteriorates due to temperature variations affecting the photodiode's current response
Solution Approach 1:
The patent introduces a temperature detection circuit that continuously monitors the temperature of the photodiode and feeds this information back to a processing circuit. The processing circuit then compensates for temperature-induced errors by adjusting the detection results based on the temperature data, thereby maintaining high detection accuracy across varying temperature conditions.
Solution Approach 2:
The patent introduces a temperature sensitive diode as an intermediary element that indirectly measures the temperature affecting the photodiode. This temperature sensitive diode serves as a mediator between the physical temperature condition and the electronic compensation mechanism, enabling accurate temperature sensing without directly interfering with the photodiode's light detection function.
2Measurement precision
If a temperature detection circuit is added to correct light detection results, then the detection accuracy is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges the temperature detection circuit and the photoelectric detection circuit into a single integrated array substrate. Both circuits share common structural layers and manufacturing processes, allowing them to be fabricated together as one unified device. This integration reduces overall device complexity despite adding functional elements.
Solution Approach 2:
The array substrate is designed with multi-functionality, serving both as a display device and as a recognition device with integrated photoelectric detection and temperature compensation capabilities. This universal design allows a single structure to perform multiple functions, reducing the need for separate dedicated components.
3Ease of manufacture
If the temperature sensitive sensor and photosensitive sensor are placed on the same layer, then the manufacturing process is simplified, but the temperature sensor may interfere with the photosensitive sensor's light detection
Solution Approach 1:
The patent applies local quality by giving different functional characteristics to different regions of the same layer. The temperature sensitive diode and photodiode are designed with different structural properties tailored to their specific functions - the temperature sensitive diode is optimized for temperature sensing while the photodiode is optimized for light detection, allowing them to coexist on the same layer without significant interference.
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 integration of a temperature detection circuit enhances the accuracy of light detection results, ensuring that recognition functions like fingerprint, iris, and face recognition are not affected by temperature fluctuations, maintaining the photosensitive performance and area of the photodiode while simplifying the structure and reducing process complexity.
Implementation Method 1
the temperature detection circuit includes a temperature sensitive diode configured to detect temperature
Implementation Method 2
the photoelectric detection circuit includes a photosensitive sensor configured to detect light for imaging
Data Source
AI summary
An array substrate, a display panel and an operating method thereof are disclosed. The array substrate includes a base substrate; an imaging array disposed on the substrate, wherein the imaging array includes a photoelectric detection circuit and a temperature detection circuit, the photoelectric detection circuit includes a photosensitive sensor configured to detect light for imaging, and the temperature detection circuit includes a temperature sensitive sensor configured to detect temperature.