Integrated Gate Line for Photo Touch Sensor Aperture Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integration of photo touch sensors in display devices reduces the aperture ratio, leading to decreased visibility and image quality due to the need for additional driving lines, which affects the overall performance of touch screen integrated display devices.
Innovation Solution
Combining sensor gate lines and display gate lines to apply gate signals to photo touch sensors, and distributing photo touch sensors across different gate lines in consideration of capacitance, eliminates the need for separate lines for sensor and display gate signals, thereby improving the aperture ratio and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If photo touch sensors are embedded in the display panel, then touch sensing function is achieved, but aperture ratio is reduced
Solution Approach 1:
The patent combines the sensor gate line and display gate line into a single integrated gate line structure. This gate line simultaneously applies gate signals to both the photo touch sensor and the display pixels, eliminating the need for separate sensor gate lines and thereby reducing the aperture ratio while maintaining touch sensing functionality.
Solution Approach 2:
The integrated gate line serves multiple functions: it acts as both a sensor gate line for controlling the photo touch sensor and a display gate line for controlling the display pixels. This multi-functional design reduces the number of separate lines needed, improving the aperture ratio without sacrificing touch sensing capability.
2Adaptability or versatility
If separate sensor gate line and display gate line are provided, then photo touch sensor can be driven independently, but device complexity increases
Solution Approach 1:
The patent merges the sensor gate line and display gate line into a single integrated structure that can still independently control both the photo touch sensor and display pixels through signal multiplexing, thereby reducing device complexity while maintaining independent control capability.
Solution Approach 2:
The integrated gate line is designed to perform multiple functions simultaneously - controlling both sensor and display operations - which reduces the overall number of driving lines needed in the system while preserving the ability to independently drive the photo touch sensor when required.
3Reliability
If photo touch sensors are distributed in every gate line, then capacitance balance is improved, but aperture ratio is further reduced
Solution Approach 1:
The patent implements non-uniform distribution of photo touch sensors across different gate lines, placing sensors strategically in certain gate lines while omitting them in others. This localized approach maintains capacitance balance in regions where sensors are present while minimizing the overall impact on aperture ratio.
Solution Approach 2:
Instead of distributing photo touch sensors in every gate line, the patent applies partial distribution only in specific gate lines where it is most beneficial. This partial action approach achieves sufficient capacitance balance while avoiding the excessive aperture ratio reduction that would result from universal distribution.
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 solution enhances the aperture ratio and visibility of display devices by minimizing the reduction in image quality caused by the presence of photo touch sensors, allowing for thinner and more durable display devices with improved user experience.
Implementation Method 1
the photo touch sensor recognizes touches through a light leakage current of a photo transistor which is generated from incident light or reflected light by a touched object
Data Source
AI summary
A display device according to the present disclosure includes a sensor pixel unit including a plurality of pixels, a photo touch sensor in the sensor pixel unit, a read out line which is disposed in a second direction and transmits a touch sensing signal by the photo touch sensor, a sensor data line which is disposed in the second direction and applies a sensor data signal to the photo touch sensor, and a sensor display gate line which is disposed in a first direction different from the second direction and applies a sensor gate signal to the photo touch sensor and applies a display gate signal to the plurality of pixels.