Light-Shielding Layer for Temperature Sensor in OLED Display Substrate
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Solution Overview
Problem
OLED display devices face issues with uneven luminance and residual images due to declining sub-pixel luminance over time, affecting display quality, and existing optical compensation techniques are inaccurate due to temperature sensor deviations and light sensitivity.
Innovation Solution
A display substrate with integrated temperature sensors and light-shielding layers to accurately detect sub-pixel temperature and luminance, improving compensation accuracy by shielding light to prevent interference with temperature sensor readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensors are integrated into the OLED display device to detect temperature, then temperature detection capability is improved, but light sensitivity interferes with temperature sensor readings causing measurement inaccuracy
Solution Approach 1:
A light-shielding layer is introduced as an intermediary between the light-emitting OLED structure and the temperature sensor. This layer blocks harmful light from reaching the temperature sensor, eliminating the light sensitivity interference while allowing the sensor to accurately detect temperature changes in the OLED display device.
Solution Approach 2:
The harmful light sensitivity characteristic is extracted and isolated from the temperature sensor system by introducing the light-shielding layer. This separates the light-emitting function of the OLED from the temperature detection function, allowing each to operate independently without interference.
2Reliability
If optical compensation techniques are used to correct luminance unevenness, then display quality improvement is intended, but temperature sensor deviations reduce compensation accuracy
Solution Approach 1:
The light-shielding layer serves as a mediator that protects the temperature sensor from light interference, ensuring accurate temperature measurements. This accurate temperature data is critical for the optical compensation technique to correctly adjust for luminance unevenness caused by temperature variations, thereby improving overall compensation accuracy.
Solution Approach 2:
The system uses temperature sensor feedback to monitor temperature changes in the OLED display device. By protecting the sensor from light interference, the system ensures accurate feedback signals are received, allowing the optical compensation technique to make precise adjustments to correct luminance unevenness in real-time.
3Reliability
If existing optical compensation techniques are applied, then luminance unevenness correction is attempted, but residual images persist due to inaccurate temperature detection
Solution Approach 1:
The light-shielding layer mediates between the OLED structure and temperature sensor, preventing light from causing inaccurate temperature readings. This ensures that the temperature data used for compensation is accurate, enabling the system to effectively prevent residual image formation while maintaining high display quality.
Solution Approach 2:
The light-shielding layer converts the potentially harmful effect of light exposure to the temperature sensor into a beneficial isolation that ensures measurement accuracy. By blocking light, the system transforms what would be a source of error into a protective measure that enhances the effectiveness of the optical compensation technique in eliminating residual images.
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
Enhances the accuracy of luminance compensation in OLED display devices by effectively isolating temperature sensors from light, leading to improved display quality and reduced residual images.
Implementation Method 1
a light-shielding layer disposed on a peripheral side, a side proximate to the base substrate, and a side away from the base substrate, of a temperature sensor in the temperature sensors. The light-shielding layer is configured to shield light emitted to the temperature sensor
Data Source
AI summary
A display substrate includes a plurality of sub-pixels. The display substrate further includes: a base substrate; a plurality of temperature sensors disposed on a first side of the base substrate; and a light-shielding layer disposed on a peripheral side, a side proximate to the base substrate, and a side away from the base substrate, of a temperature sensor in the temperature sensors. The temperature sensor is configured to detect a temperature of at least one of the plurality of sub-pixels. The light-shielding layer is configured to shield light emitted to the temperature sensor.