Pixel Unit Driving for Higher Small-Grayscale Display Brightness
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Solution Overview
Problem
Existing display technologies face issues with small brightness at small grayscales due to decreased driving current, affecting display quality.
Innovation Solution
A display device with a driving chip that reduces the number of actual light-emitting pixels in a pixel unit based on grayscale information, adjusting the number and brightness of pixels to maintain or increase brightness, thereby enhancing the display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of light-emitting pixels is reduced to increase brightness per pixel, then the brightness at small grayscale is improved, but the display resolution and detail are degraded
Solution Approach 1:
The pixel unit is divided into multiple sub-pixels (first pixel, second pixel, third pixel, fourth pixel) that can be independently controlled. This segmentation allows selective activation of specific sub-pixels based on grayscale requirements, enabling brightness enhancement for certain pixels while maintaining overall display resolution through the combined output of all sub-pixels.
Solution Approach 2:
Different sub-pixels within the same pixel unit are assigned different brightness levels based on their grayscale values. The first pixel and second pixel may operate at different brightness levels than the third and fourth pixels, allowing local optimization of brightness distribution to enhance small grayscale display while preserving overall image quality.
2Illumination intensity
If the driving current is increased to improve brightness, then the brightness at small grayscale is improved, but the power consumption increases
Solution Approach 1:
Instead of increasing the driving current for all pixels uniformly, the invention applies partial action by selectively enhancing the driving current only for specific sub-pixels that require higher brightness at small grayscale levels. This approach improves brightness where needed while avoiding unnecessary power consumption in pixels that already have sufficient brightness.
Solution Approach 2:
The invention dynamically adjusts the driving current parameter for different sub-pixels based on grayscale information. By changing the current parameter selectively rather than uniformly, the system achieves improved brightness at small grayscale while optimizing power consumption through parameter adaptation to actual display requirements.
Data Source
AI summary
Provided is a display device, including a display panel and a driving chip electrically connected thereto. A display region is provided with a plurality of pixel units, one of which includes n pixels, where n≥2. The driving chip drives the display panel to display according to grayscale information of the pixel unit in image data. A number of light-emitting pixels in the pixel unit during display is less than a number of pixels with non-zero grayscales in the grayscale information of the pixel unit. When grayscale information is a first grayscale, a number of light-emitting pixels in the pixel unit during display is n1, and brightness of at least one pixel is L1. When grayscale information is a second grayscale larger than the first grayscale, a number of light-emitting pixels in the pixel unit during display is n2>n1, and brightness of at least one pixel is L2>L1.