Display Device Shielding Layers Voltage Management
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Solution Overview
Problem
Current display devices face challenges in expanding the display area without compromising the display quality, as existing technologies often result in reduced image quality when attempting to enlarge the visible image area.
Innovation Solution
The proposed solution involves a display device with a gate driving block that overlaps a second display area, utilizing a first and second shielding layer with different common voltages, and a reference voltage line to transmit driving signals to both first and second pixels, allowing for efficient expansion of the display area while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display area is enlarged to expand the visible image area, then the display area is increased, but the display quality deteriorates
Solution Approach 1:
The patent applies different common voltages to different shielding layers in different display areas. Specifically, a first common voltage is applied to a first shielding layer in a first display area, and a second common voltage (with a different voltage level) is applied to a second shielding layer in a second display area. This local differentiation of electrical properties allows each region to be optimized for its specific function, enabling display area expansion while maintaining display quality.
2Device complexity
If a single common voltage is applied to all shielding layers, then the circuit design is simple, but the display quality deteriorates in enlarged display areas
Solution Approach 1:
The patent implements different common voltages for different shielding layers corresponding to different display areas. The first shielding layer receives a first common voltage while the second shielding layer receives a second common voltage with a different voltage level. This approach balances circuit design feasibility with display quality requirements by introducing voltage differentiation only where needed for quality maintenance.
3Area of stationary object
If the gate driving block is positioned to overlap the second display area, then the display area expansion is achieved, but electrical interference may increase
Solution Approach 1:
The patent introduces shielding layers as intermediary structures between the gate driving block and the display pixels. These shielding layers, when provided at different potentials (first common voltage for first shielding layer, second common voltage for second shielding layer), act as electrostatic shields that intercept and redirect electrical interference fields, preventing them from reaching the sensitive pixel regions and thus reducing electrical interference in the expanded display area.
Data Source
AI summary
A display device includes a display panel that displays an image and including a first display area, in which a plurality of first pixels is disposed, and a second display area which is adjacent to the first display area and in which a plurality of second pixels is disposed and a gate driving block which overlaps the second display area and transmits driving signals to the plurality of first pixels and the plurality of second pixels. Each of the plurality of first pixels includes a first shielding layer. Each of the plurality of second pixels includes a second shielding layer. A first common voltage is applied to the first shielding layer, and a second common voltage having a voltage level different from a voltage level of the first common voltage is applied to the second shielding layer.