Display Substrate Pixel Electrode Delayed Signal Heating
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Solution Overview
Problem
Existing display devices with electro-optical elements, such as electrophoretic or liquid crystal elements, experience decreased responsiveness and deteriorated display performance at low temperatures due to the complexity of generating separate voltages for display and heating, which complicates the device configuration and manufacturing process.
Innovation Solution
A display device substrate configuration that includes a pixel electrode with two connection points, controlled by transistors and a delay circuit, where a delayed driving signal creates a potential difference to generate heat, simplifying the voltage generation and eliminating the need for a separate heating wire or temperature sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate voltages for display and heating are generated, then heating function is achieved, but device configuration becomes complicated
Solution Approach 1:
The patent combines the display voltage generation and heating voltage generation into a single voltage generation circuit. The same voltage generation circuit generates both the display voltage applied to the pixel electrode and the heating voltage applied to the heating wire, eliminating the need for separate voltage generation circuits and simplifying the overall device configuration.
Solution Approach 2:
The voltage generation circuit is designed to perform multiple functions: it can generate display voltage for normal operation and switching, and simultaneously generate heating voltage for temperature control. This multi-functional design reduces the number of components and simplifies the device structure.
2Temperature
If temperature sensor is added for heating control, then temperature monitoring is achieved, but device configuration becomes complicated
Solution Approach 1:
The pixel electrode serves a dual function: it acts as both the display electrode and the temperature sensing element. By monitoring the voltage applied to the pixel electrode and the current flowing through it, the system can detect temperature changes without requiring a separate temperature sensor. The heating control is achieved through self-monitoring of the existing display circuit components.
3Temperature
If heating wire is added for electro-optical element heating, then heating function is improved, but device configuration becomes complicated
Solution Approach 1:
The heating wire is integrated with the existing pixel electrode structure rather than being added as a completely separate component. The same conductive structures that form the pixel electrode also serve as heating elements, combining the display function and heating function into a unified structure.
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 effectively heats the electro-optical element while maintaining simplified device configuration and manufacturing, enhancing display characteristics by facilitating heat generation in response to environmental temperature without requiring additional sensors.
Implementation Method 1
a potential difference occurs between the first connection point and the second connection point for a delay time after a voltage of the first driving signal fluctuates. An electric current corresponding to the potential difference flows. Consequently, the pixel electrode generates heat.
Implementation Method 2
an electro-optical element, a display gradation of which changes according to application of a voltage
Data Source
AI summary
A display device substrate includes a pixel electrode including a first connection point and a second connection point and for applying a voltage to an electro-optical element, a display gradation of which changes according to application of a voltage, a first signal line, a second signal line, a first transistor configured to control connection of the first signal line and the first connection point, a second transistor configured to control connection of the second signal line and the second connection point, and an output section configured to supply a first driving signal to the first signal line and supply a second driving signal delayed with respect to the first driving signal to the second signal line.