Electrophoretic Display Border Voltage Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electro-phoretic display apparatuses often suffer from a distortion phenomenon in the border area due to the use of a common electrode voltage, leading to a gray border that can distort the display.
Innovation Solution
A driving circuit is used to generate a second voltage that maintains the border area displaying either a white or black color by adjusting the absolute value of the first voltage, ensuring electro-phoretic particles remain at a predetermined position, thus preventing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common electrode voltage is applied to the border area to simplify circuit complexity, then the system complexity is reduced, but a gray border phenomenon occurs causing display distortion
Solution Approach 1:
The patent applies different voltage control strategies to different regions of the display panel. The border area is controlled with a second voltage that differs from the first voltage applied to the main display area, allowing the border to maintain a specific color (first or second color) without displaying gray artifacts. This local differentiation resolves the contradiction by sacrificing some circuit uniformity to achieve superior local display quality in the border region.
2Stability of the object's composition
If the border area is connected to the common electrode voltage to maintain a predetermined border color, then the border color stability is improved, but a gray border phenomenon is produced causing distortion
Solution Approach 1:
The patent changes the voltage parameter applied to the border area from the common first voltage to a specifically designed second voltage. This second voltage is generated by the driving circuit based on the first voltage but with modified characteristics that prevent the gray border phenomenon while maintaining the desired border color stability. The parameter change resolves the contradiction by finding an optimal voltage value that simultaneously achieves color stability and eliminates distortion.
3Manufacturing precision
If the driving circuit generates a second voltage with adjusted absolute value to maintain border particles at a predetermined position, then the border display quality is improved, but the voltage control complexity increases
Solution Approach 1:
The patent introduces a driving circuit as an intermediary component that automatically generates the second voltage based on the first voltage. This driving circuit performs the voltage transformation and adjustment functions, eliminating the need for manual or complex external voltage control. The intermediary driving circuit resolves the contradiction by automating the voltage adjustment process, making the system easier to control while achieving superior border display quality.
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
The solution effectively prevents the gray border distortion, enhancing the visual effect by maintaining a clear border color, either white or black, which improves the viewing zone's visual impact.
Implementation Method 1
An electro-phoretic display apparatus includes a display area and a border area. A voltage difference between a first voltage and a second voltage drives electro-phoretic particles to be maintained to a predetermined position
Data Source
AI summary
An electro-phoretic display apparatus including an electro-phoretic display panel and a driving circuit is provided. The electro-phoretic display panel includes a display area and a border area. The driving circuit is configured to drive the display area to display an image frame according to a first voltage. The driving circuit drives the border area to maintain displaying a border of a first color or a second color according to a second voltage. The driving circuit generates the second voltage according to the first voltage. The border area includes electro-phoretic particles of the first color or the second color. A voltage difference between the first voltage and the second voltage drives the electro-phoretic particles of the first color or the second color to be maintained to a predetermined position such that the border area maintains displaying the border of the first color or the second color.