Display Pixel Readout Shielding for Accurate Light Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in improving the sensing accuracy of light sensors, particularly in environments where electrical interference and crosstalk between conductors affect the reliability of light detection.
Innovation Solution
The display device incorporates a configuration where a third conductor shields coupling between a first and a second conductor, while a readout line receives a current corresponding to light amount, and element control lines selectively activate light sensors using transistors, allowing for improved light sensing accuracy by managing voltage levels on conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conductors are arranged closely together to reduce device area, then area is reduced, but electrical interference and crosstalk between conductors increase
Solution Approach 1:
The patent introduces a shield conductor as an intermediary element positioned between signal conductors. This shield conductor acts as a mediator that blocks electrical interference and crosstalk between adjacent conductors, allowing them to be placed closer together without suffering from harmful electromagnetic coupling effects.
Solution Approach 2:
The patent applies different properties to different parts of the conductor system. Specifically, shield conductors are assigned different electrical potential levels than signal conductors, creating local electrical field boundaries that contain interference locally and prevent it from affecting adjacent circuits.
2Object-affected harmful factors
If shielding conductors are added between signal conductors to reduce crosstalk, then electrical interference is reduced, but device complexity increases
Solution Approach 1:
The shield conductors serve multiple functions simultaneously: they act as electrical shields to block crosstalk, serve as structural elements defining conductor patterns, and can be integrated with existing transistor gate structures. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The patent merges the shield conductor function with existing device structures. The shield conductors are formed using the same fabrication processes as signal conductors and are integrated into the existing transistor gate and electrode structures, combining multiple functions into unified elements.
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 configuration enhances the sensing accuracy of light sensors by reducing electrical interference and crosstalk, thereby improving the reliability of light detection in display devices.
Implementation Method 1
a third conductor configuring a portion of the readout line is between a first conductor configuring a portion of the first element control line and a second conductor configuring a portion of the second element control line
Implementation Method 2
the readout line is configured to receive a current corresponding to a light amount of light applied to the light sensor
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A display device includes: a sub-pixel connected to a data line; and a light sensor adjacent to the sub-pixel in a first direction and connected to a readout line, a first element control line, and a second element control line, wherein the readout line is configured to receive a current corresponding to a light amount of light applied to the light sensor, and in an area where the light sensor is formed, a third conductor configuring a portion of the readout line is between a first conductor configuring a portion of the first element control line and a second conductor configuring a portion of the second element control line.