Display Compensation Circuit for Hole Area Burn-In Prevention
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Solution Overview
Problem
In display structures with a hole area, the voltage level for pixels in the affected area increases, leading to potential burn-in issues due to inconsistent brightness across the display panel.
Innovation Solution
A compensation circuit is placed in the hole area to adjust the impedance and apply different pixel driving voltages, ensuring consistent voltage supply to pixels across the panel, thereby preventing burn-in and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a hole area is formed in the display panel to secure space for a front camera, then the space for placing the front camera is secured, but the voltage level to pixels in the affected area increases causing burn-in
Solution Approach 1:
The patent applies local quality by differentiating the driving voltage according to the spatial location of pixels. Pixels in the first area (without hole) receive a first driving voltage while pixels in the second area (with hole) receive a second driving voltage. This localized differentiation prevents excessive voltage in the hole-affected area, thereby preventing burn-in while maintaining the camera space requirement.
Solution Approach 2:
The patent changes the electrical parameter (driving voltage) based on the structural modification (hole area). By detecting the presence of a hole area and adjusting the driving voltage parameter accordingly for different pixel regions, the system compensates for the impedance changes caused by the hole, preventing voltage-induced burn-in while preserving the functional space for the camera.
2Device complexity
If the same pixel driving voltage is applied to all pixels, then the display driver IC operation is simplified, but brightness inconsistency occurs in the hole area
Solution Approach 1:
The patent implements local quality by dividing the display panel into different areas (first area without hole, second area with hole) and applying different driving voltages to each. This localized approach compensates for the impedance differences caused by the hole, ensuring uniform brightness across the entire display while maintaining relatively simple driver operation through area-based classification.
Solution Approach 2:
The patent achieves equipotentiality in terms of brightness by equalizing the effective voltage across different pixel regions. Although different driving voltages are applied to different areas, the system compensates for impedance differences so that pixels in both the first and second areas receive equivalent effective voltage, resulting in uniform brightness output.
3Illumination intensity
If a compensation circuit is added to fix voltage inconsistency, then pixel brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The patent minimizes device complexity by implementing local quality through area-based voltage differentiation. Instead of adding complex compensation circuits, the system simply divides pixels into areas and applies different driving voltages based on their location relative to the hole area. This approach achieves brightness uniformity with minimal structural modification to the display driver.
Solution Approach 2:
The patent applies segmentation by dividing the display panel into multiple areas (first area and second area) based on the hole location. This segmentation allows the display driver to apply different voltages to different segments, achieving brightness consistency without requiring a complex unified compensation system. The segmentation approach simplifies the overall driver structure while maintaining performance.
Data Source
AI summary
A display is disclosed. A display according to various embodiments may comprise: a panel comprising a first pixel line comprising multiple first pixels formed in a first direction and a second pixel line comprising multiple second pixels formed in the first direction; a first wire for supplying power to the multiple first pixels included in the first pixel line; a second wire for supplying power to the multiple second pixels included in the second pixel line; and a compensation circuit electrically connected to the second wire, and compensating for an impedance corresponding to the difference in number between the multiple first pixels and the multiple second pixels. A display according to various embodiments may comprise: a panel comprising a first pixel line comprising multiple first pixels formed in a first direction and a second pixel line comprising multiple second pixels formed in the first direction; a first wire for supplying first power to the multiple first pixels included in the first pixel line; a second wire for supplying second power to the multiple second pixels included in the second pixel line; and a display driver IC configured to apply a first ELVdd and a first ELVss, which corresponds to the first ELVdd, to the first pixel line as first power and to apply a second ELVdd and a second ELVss, which corresponds to the second ELVdd, to the second pixel line as second power. Various other embodiments may also be provided.