OLED Display Temperature Sensor Array for Image Quality
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Solution Overview
Problem
Existing OLED displays lack the capability to accurately sense temperature, which affects image quality and reliability due to temperature-induced variations in pixel performance.
Innovation Solution
An OLED display with integrated temperature sensing regions, a temperature sensor array, and a control unit that selects and amplifies signals from temperature sensors to generate precise temperature data, allowing for real-time temperature mapping and compensation, such as image sticking compensation and gamma correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensing capability is added to OLED display, then temperature monitoring precision is improved, but device complexity increases
Solution Approach 1:
The display panel is divided into multiple sensing regions with temperature sensors distributed across different areas. Each sensor independently measures temperature at its specific location, enabling precise spatial temperature mapping without requiring a single complex sensing system
Solution Approach 2:
The temperature sensors are integrated into the existing display structure, allowing the display panel to simultaneously serve both its primary display function and temperature sensing function. The same pixel structures and circuitry are utilized for both image display and temperature measurement
2Loss of information
If multiple temperature sensors are arranged across sensing regions, then temperature data coverage is improved, but manufacturing complexity increases
Solution Approach 1:
The temperature sensing system is segmented into multiple independent sensing regions distributed across the display panel. Each region contains its own temperature sensor that can be independently manufactured and tested, simplifying the overall manufacturing process while achieving comprehensive temperature coverage
Solution Approach 2:
Temperature sensors are strategically placed in specific sensing regions where temperature variations are most critical. Each sensor is optimized for its local environment, allowing tailored manufacturing approaches for different regions based on their specific temperature characteristics
3Manufacturing precision
If temperature compensation is performed in real-time, then image quality is improved, but processing time increases
Solution Approach 1:
Temperature compensation parameters and correction algorithms are pre-calculated and stored in memory during the manufacturing process. When temperature data is acquired during operation, the system quickly retrieves and applies the pre-prepared compensation parameters, avoiding time-consuming real-time calculations while maintaining high image quality
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 improved temperature monitoring and compensation, enhancing the display's image quality and reliability by accounting for temperature variations across the screen.
Implementation Method 1
Each of the temperature sensors may include a temperature variable resistor, a resistance value of which is changed according to temperature
Data Source
AI summary
An organic light-emitting diode (OLED) display and a method of driving the same are disclosed. In one aspect, the OLED display includes a display panel including a plurality of pixels and a plurality of sensing regions. The OLED display further includes a temperature sensor array comprising a plurality of temperature sensors respectively arranged on the sensing regions. The OLED display also includes a controller configured to output a plurality of control signals so as to sequentially select the temperature sensors, receive a plurality of output signals output from the temperature sensors selected by the control signals, and generate first temperature data corresponding to the locations of the selected temperature sensors based on the output signals.