Display Panel Region-Specific Initialization Voltage for Luminance Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The display quality of display panels is deteriorated due to uniformity issues in initialization voltages applied to pixels, leading to inconsistencies in luminance and visibility of stains.
Innovation Solution
A display device with a display panel that applies different initialization voltages to different regions based on location data from a mother panel, using offset voltages to compensate for luminance uniformity, ensuring faster initialization of light emitting elements and reducing stain visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the same initialization voltage is applied to all pixels, then the manufacturing process is simple, but the luminance uniformity deteriorates
Solution Approach 1:
The patent divides the display panel into multiple regions (first display region and reference display region) and applies different initialization voltages to each region. Specifically, a first initialization voltage is applied to the first display region while a second initialization voltage is applied to the reference display region, where these voltages differ to compensate for regional luminance uniformity issues. This local differentiation resolves the contradiction by maintaining manufacturing simplicity through a systematic voltage application process while achieving improved luminance uniformity through region-specific voltage optimization.
2Manufacturing precision
If different initialization voltages are applied to different regions, then the luminance uniformity is improved, but the device complexity increases
Solution Approach 1:
The voltage generator is segmented into multiple initialization voltage generation units, where each unit is responsible for generating a specific initialization voltage for a particular region. The system includes a first initialization voltage generation unit for the first display region and a second initialization voltage generation unit for the reference display region. This segmentation allows the complex task of generating multiple different initialization voltages to be divided into manageable, independent units, thereby improving luminance uniformity while controlling device complexity through modular design.
3Speed
If the initialization voltage is increased to improve initialization speed, then the initialization time is reduced, but the power consumption increases
Solution Approach 1:
The patent changes the parameter of initialization voltage from a single uniform value to multiple region-specific values. By optimizing the magnitude of initialization voltages for different regions based on their specific luminance uniformity requirements, the system achieves faster initialization speed in critical regions without unnecessarily increasing power consumption across the entire display panel. This parameter differentiation allows precise control of the trade-off between initialization speed and power consumption.
Data Source
AI summary
A display device includes a display panel including pixels, a data driver, a gate driver and a voltage generator configured to apply an initialization voltage to the display panel. The display panel includes a first display region and a reference display region. At least one pixel of the pixels includes a driving transistor configured to generate a driving current based on the data voltage, a light emitting element including a first electrode receiving the driving current and a second electrode receiving the low power voltage and an initialization transistor configured to apply the initialization voltage to the first electrode of the light emitting element. The initialization voltage includes a first region initialization voltage and a reference region initialization voltage. The first region initialization voltage applied to the first display region is inconsistent with the reference region initialization voltage applied to the reference display region.