Backlight Module Optical Diffusion Coefficient Crosstalk Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large-sized high-brightness display apparatuses face issues with crosstalk between light-emitting devices in the backlight module due to their small thickness and numerous backlight zones, affecting display quality.
Innovation Solution
A data processing method that determines relative positional relationships and optical diffusion coefficients for each pixel and backlight unit, calculating a backlight brightness characteristic value to adjust light emission and prevent crosstalk, thereby improving display efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight module uses a large number of LEDs to improve brightness, then the brightness is improved, but crosstalk between adjacent backlight units occurs due to small thickness and numerous zones
Solution Approach 1:
The patent applies local quality by determining separate optical diffusion coefficients for each backlight unit based on their specific positional relationships with pixels. This allows each backlight unit to have customized compensation parameters that account for its unique location, adjacent units, and distance to pixels, thereby reducing crosstalk while maintaining overall brightness.
Solution Approach 2:
The patent changes parameters by calculating and applying different optical diffusion coefficients and brightness compensation values for each backlight unit. By dynamically adjusting these parameters based on positional relationships and crosstalk characteristics, the system optimizes brightness distribution and minimizes interference between adjacent zones.
2Ease of operation
If local dimming technology is used to control brightness in zones, then brightness control is improved, but crosstalk between adjacent backlight units increases
Solution Approach 1:
The patent implements feedback by calculating the actual light distribution from each backlight unit to pixels using determined optical diffusion coefficients. This feedback mechanism allows the system to identify crosstalk patterns and apply appropriate compensation values to adjust brightness control, reducing the harmful effects of adjacent unit interference.
Solution Approach 2:
The patent applies local quality by implementing position-dependent brightness compensation. Each backlight unit receives customized control adjustments based on its specific spatial relationship with pixels and adjacent units, enabling precise local dimming while minimizing crosstalk between zones.
3Length of stationary object
If the display apparatus is made thinner, then the device compactness is improved, but the distance between backlight units and pixels is reduced causing increased crosstalk
Solution Approach 1:
The patent compensates for reduced thickness by dynamically adjusting brightness control parameters based on the actual small distance between backlight units and pixels. The optical diffusion coefficient calculation incorporates this reduced distance, allowing the system to maintain accurate brightness control and minimize crosstalk despite the compact form factor.
4Manufacturing precision
If numerous backlight zones are used to improve display resolution, then display quality is improved, but the complexity of brightness control increases
Solution Approach 1:
The patent applies segmentation by dividing the backlight module into multiple independently controllable backlight units, each corresponding to specific pixels. This segmentation allows for localized brightness control and individual optical diffusion coefficient calculation, managing complexity through modular organization while maintaining high display quality.
Solution Approach 2:
The patent manages complexity by implementing local quality control where each backlight unit has its own optimized brightness control parameters and optical diffusion coefficient. This localized approach allows high precision display quality through position-specific adjustments without requiring complex global control mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances display quality by minimizing crosstalk and ensuring uniform light emission across the display apparatus, maintaining image integrity and reducing power consumption.
Implementation Method 1
determining an optical diffusion coefficient of each first backlight unit at a corresponding position of the first pixel according to the relative positional relationships
Data Source
AI summary
A data processing method spoiled to a display apparatus includes, obtaining first image data including first pixel values of pixels; obtaining a brightness control value of each backlight unit according to first pixel values of pixels corresponding to the backlight unit; determining relative positional relationships between a first pixel and at least two first backlight units in a plane perpendicular to a thickness direction of the display apparatus, the first backlight units including a backlight unit corresponding to the first pixel and backlight unit(s) adjacent thereto; determining an optical diffusion coefficient of each first backlight unit at a corresponding position of the first pixel according to the relative positional relationships; and determining a backlight brightness characteristic value of the first pixel according to a brightness control value of each first backlight unit and the optical diffusion coefficient of each first backlight unit at the corresponding position of the first pixel.