Electrophoretic Display Humidity Sensing for Adaptive Waveform Control
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Solution Overview
Problem
Display devices are sensitive to environmental parameters such as humidity and temperature, which affect their optical performance, necessitating the need for sensing and adjusting driving waveforms accordingly.
Innovation Solution
Incorporating a humidity sensor, such as a capacitive or resistive humidity sensor, and a temperature sensor into the display device to measure environmental conditions and adjust driving waveforms based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If humidity sensing and dynamic waveform adjustment are implemented, then optical performance is improved, but device complexity increases
Solution Approach 1:
The patent combines the humidity sensor, temperature sensor, and driving chip into an integrated system where the sensor outputs are directly connected to the driving chip that controls the electrophoretic display. This merging of components allows dynamic adjustment of driving waveforms based on environmental conditions, improving optical performance while managing system complexity through functional integration.
Solution Approach 2:
The patent implements a feedback mechanism where humidity and temperature sensors continuously monitor environmental parameters, and the driving chip adjusts the driving waveforms in response to sensor outputs. This closed-loop feedback system enables real-time optimization of display performance according to actual environmental conditions, resolving the contradiction between performance improvement and system complexity.
2Measurement precision
If multiple sensors are added to sense environmental parameters, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple sensing functions (humidity sensing and temperature sensing) into a coordinated system where both sensors are connected to the same driving chip. This merging approach allows simultaneous measurement of multiple environmental parameters without proportionally increasing system complexity, as the sensors share common control and processing infrastructure.
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
Improves the optical performance of the display device by accurately responding to changes in humidity and temperature, enhancing image quality and reliability.
Implementation Method 1
the humidity sensor is a capacitive humidity sensor or a resistive humidity sensor
Implementation Method 2
the humidity sensor is a capacitive humidity sensor or a resistive humidity sensor
Implementation Method 3
confirming a resistance value of a temperature sensor of the display device; and confirming a temperature according to the resistance value of the temperature sensor
Data Source
AI summary
A display device including an element array substrate, an electrophoretic display substrate and a humidity sensor is provided. The electrophoretic display substrate is disposed on the element array substrate. The humidity sensor includes a conductive pattern disposed on a side of the element array substrate adjacent to the electrophoretic display substrate. A driving method of the display device is also provided.