Regional Power-Line Layout for Uniform Display Luminance
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Solution Overview
Problem
Existing display devices struggle to achieve uniform and efficient control of luminance across different areas of the display screen, leading to suboptimal display quality and increased power consumption.
Innovation Solution
The display device is divided into multiple areas with separate power lines providing independent voltage levels to each area, allowing for customized luminance control and increased display quality while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single power line is used to supply voltage to all pixels, then the device complexity is reduced, but the luminance uniformity and display quality deteriorate
Solution Approach 1:
The display area is divided into multiple regions (first area and second area), and separate power lines (first power line and second power line) are provided for each region. This segmentation allows independent voltage control for each area, enabling precise luminance adjustment while maintaining overall system manageability.
Solution Approach 2:
Different voltage levels are applied to different areas based on their specific display requirements. The first pixels in the first area receive a first voltage, while the second pixels in the second area receive a second voltage, allowing each region to have optimized luminance characteristics suitable for its function.
2Measurement precision
If independent power lines are provided for different areas, then the luminance control precision is improved, but the device complexity increases
Solution Approach 1:
The power supply system is segmented into multiple independent power lines, each serving specific regions. This allows precise luminance control for each area while keeping the overall structure organized and manageable through clear regional division.
Solution Approach 2:
The voltage levels supplied to different areas can be dynamically adjusted independently. During a first period, the first voltage has a voltage level different from the second voltage, enabling adaptive luminance control. During a second period, both voltages can be the same, providing flexibility in operation modes.
3Illumination intensity
If different voltage levels are applied to different areas, then the display quality is enhanced, but the energy consumption increases
Solution Approach 1:
Different voltage levels are applied only to specific areas where needed, rather than uniformly across the entire display. This allows enhanced display quality in regions requiring higher luminance while consuming less energy in regions where lower luminance suffices.
Solution Approach 2:
The voltage levels are adjusted periodically based on operational requirements. During a first period, different voltage levels provide enhanced display quality, while during a second period, both areas use the same voltage level to reduce power consumption, creating an energy-efficient operational cycle.
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A display device includes a base layer including a display area (DA) having a plurality of pixels (PX1,PX2) and a non-display area (NDA), a first power line (PL-1) electrically connected to the plurality of pixels (PX1, PX2), and a second power line (PL2) electrically connected to the plurality of pixels (PX1, PX2). The display area is divided into a plurality of areas including a first area (AA1) and a second area (AA2). The second power line includes a second-first power line (PL2-1) that applies a first voltage (ELVSS1) to first pixels (PX1) disposed in the first area (AA1) and a second-second power line (PL2-2) that applies a second voltage (ELVSS2) to second pixels (PX2) disposed in the second area (AA2). During a first period (A1), the first voltage (ELVSS1) has a voltage level different from a voltage level of the second voltage (ELVSS2), and during a second period (A2) that does not include the first period (A1), the first voltage (ELVSS1) has a same voltage level as the second voltage (ELVSS2).