LCD Panel and Backlight Matching for Luminance Uniformity
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Solution Overview
Problem
In the manufacturing of LCD devices, the random matching of LCD panels and backlight modules results in inconsistent luminance uniformity, which is particularly problematic for applications like VR devices where large luminance differences are easily perceived by users, and current methods are inefficient and labor-intensive.
Innovation Solution
A method and apparatus for manufacturing LCD devices that involves grouping backlight modules and LCD panels based on luminance and transmittance data using standard normal distribution functions to establish a one-to-one correspondence, ensuring matching of backlight modules and panels to minimize luminance differences and improve uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If random matching method is used for assembling backlight modules and LCD panels, then manufacturing process is simple, but luminance uniformity is poor
Solution Approach 1:
The patent applies preliminary action by measuring and recording luminance data of backlight modules and transmittance data of LCD panels before assembly. This pre-characterization allows the matching system to pair components based on their measured properties, ensuring optimal luminance uniformity from the start rather than relying on random assembly.
Solution Approach 2:
The patent changes the matching parameter from random selection to data-driven selection based on luminance and transmittance values. By establishing correspondence relationships based on these measured parameters, the system achieves consistent luminance uniformity across assembled LCD devices while maintaining efficient automated processing.
2Manufacturing precision
If manual matching method is used to ensure luminance uniformity, then luminance uniformity is improved, but production efficiency decreases and labor costs increase
Solution Approach 1:
The patent replaces manual mechanical matching with an automated information processing system. Computers automatically measure, store, analyze, and determine the correspondence relationships between backlight modules and LCD panels based on their luminance and transmittance data, eliminating the need for manual inspection and matching while maintaining high luminance uniformity.
Solution Approach 2:
The system enables self-service by allowing components to be automatically characterized and matched without human intervention. The measurement and matching processes are fully automated, with the system independently determining optimal pairings based on measured data, thereby improving productivity while maintaining manufacturing precision.
3Productivity
If automated matching is implemented, then production efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the matching system into distinct functional modules: a measurement module for collecting luminance and transmittance data, a storage module for recording component characteristics, and a processing module for determining correspondence relationships. This modular segmentation simplifies the overall system architecture while enabling automated high-efficiency matching.
4Manufacturing precision
If no matching standard is established, then manufacturing process is flexible, but product quality consistency deteriorates
Solution Approach 1:
The patent establishes a quantitative matching standard based on luminance and transmittance parameters. By defining correspondence relationships through specific parameter comparisons rather than subjective criteria, the system achieves consistent quality across all assembled LCD devices while maintaining a relatively simple matching methodology.
Data Source
AI summary
Provided is a matching method for manufacturing a liquid crystal display (LCD) device. The method includes: acquiring luminance data of a plurality of backlight modules and transmittance data of a plurality of LCD panels under a same driving condition; acquiring N backlight groups by grouping the plurality of backlight modules based on the luminance data; acquiring N panel groups by grouping the plurality of LCD panels based on the transmittance data; and determining a corresponding relationship between the backlight group and the panel group.