Display Data Driver Gamma Voltage Segmentation for Sensor Luminance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face challenges in improving the sensing sensitivity and accuracy of light sensors integrated into the display area, as the luminance of the light sensor area is not effectively differentiated from other areas, leading to compromised image quality and sensing performance.
Innovation Solution
A display device with a data driver that controls luminance differently in specific areas, using gamma voltage generators to generate distinct gamma voltage sets for different areas, and a method of driving the device to increase luminance only in the area overlapping the light sensor, while maintaining gamma stability in other areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the luminance of the light sensor area is increased to improve sensing sensitivity, then the sensing accuracy is improved, but the image quality in that area deteriorates
Solution Approach 1:
The display area is segmented into a first area (non-sensor region) and a second area (sensor region overlapping the light sensor). Different gamma voltage sets are applied to each area, allowing independent control of luminance characteristics. This segmentation enables the second area to have higher luminance for improved light sensor sensitivity while the first area maintains normal luminance for good image quality.
Solution Approach 2:
Different gamma voltage sets (first gamma voltage set and second gamma voltage set) are applied to different areas of the display. The second area receives a gamma voltage set that produces higher luminance to enhance light sensor sensitivity, while the first area uses a standard gamma voltage set for normal image display. This local differentiation of electrical characteristics resolves the contradiction between sensing accuracy and image quality.
2Measurement precision
If different gamma voltage sets are applied to different areas, then the sensing performance is improved, but the device complexity increases
Solution Approach 1:
The gamma voltage supply is segmented into multiple gamma voltage generators that can produce different gamma voltage sets. The data driver is divided into multiple output units, each capable of receiving and applying different gamma voltage sets to different areas. This segmented architecture enables differentiated luminance control without requiring a completely complex new system.
Solution Approach 2:
The data driver is designed with multi-functionality to handle both normal display operations and enhanced sensing operations. The same data driver structure can switch between different gamma voltage sets based on the operating mode (display mode or sensing mode), eliminating the need for separate dedicated circuits for each function and thereby controlling device complexity.
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 sensing sensitivity and accuracy of the light sensor by increasing luminance in the sensor area, while maintaining high-quality image display in other areas, thereby improving both sensing performance and image quality.
Implementation Method 1
a data driver configured to convert image data into data signals using the gamma voltage sets, supply the data signals to the pixels, generate the data signals corresponding to the first area and the second area using a first group comprising some of the gamma voltage generators in a first mode, and generate the data signals corresponding to the second area using a second group comprising different gamma voltage generators from the first group in a second mode
Data Source
AI summary
A display device includes a display unit comprising a plurality of pixels disposed in a display area, the display area comprising a first area and a second area; a gamma voltage supply including gamma voltage generators that are configured to generate respective ones of gamma voltage sets; and a data driver configured to convert image data into data signals using the gamma voltage sets, supply the data signals to the pixels, generate the data signals corresponding to the first area and the second area using a first group comprising some of the gamma voltage generators in a first mode, and generate the data signals corresponding to the second area using a second group comprising different gamma voltage generators from the first group in a second mode.