Spliced LED-LCD Display Brightness Synchronization Across Frames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spliced display devices with LED and LCD panels experience tearing sensations during frame conversions due to differing grayscale conversion response times, affecting display quality.
Innovation Solution
A brightness control method that adjusts the target grayscale value of the LED display area based on the response time of the LCD area to match the brightness emission, using a timing controller and grayscale conversion response timetable to synchronize the brightness levels across frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If LED display panel and LCD panel are spliced to eliminate seams, then visual quality is improved, but tearing sensation occurs during frame conversion due to different grayscale conversion response times
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing grayscale conversion response times in a lookup table before actual display operation. During frame conversion, the system retrieves the appropriate response time from the table and adjusts the LED grayscale value in advance, ensuring smooth transition without tearing. This pre-prepared data enables the system to compensate for the response time difference between LED and LCD panels during dynamic frame changes.
Solution Approach 2:
The patent changes the parameter of grayscale value for the LED display panel dynamically based on the response time characteristics. By adjusting the LED grayscale value according to the retrieved response time data, the system equalizes the brightness transition between LED and LCD panels, eliminating the tearing sensation while maintaining seamless display appearance.
2Shape
If LED display panel is used between LCD panels, then seamless splicing is achieved, but different drive circuits cause different grayscale conversion response times
Solution Approach 1:
The patent introduces an intermediary control mechanism that acts as a mediator between the LED and LCD display panels. This intermediary system retrieves response time data from a lookup table and calculates appropriate grayscale adjustments, serving as a coordination layer that harmonizes the different drive characteristics of LED and LCD panels without requiring complex integrated control circuits.
Data Source
AI summary
A brightness control method of a spliced display device is provided. The spliced display device includes display units, and each display unit includes a LED display area and an LCD area. The brightness control method includes obtaining a current grayscale value of a current frame and a target grayscale value of a target frame in the LCD area, wherein the target frame is the frame next to the current frame; obtaining a response time required to convert the current grayscale value into the target grayscale value of the LCD area; and adjusting a target grayscale value of the LED area to an actual grayscale value during the target frame according to the response time. During the target frame, the brightness emitted by the LED display area based on the actual grayscale value is the same as the brightness emitted by the LCD area based on the target grayscale value.