Backlight Driver Segmentation for LCD Panel Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal display apparatuses, the response to image data of the backlight module and the liquid crystal display panel differ by at least one frame, limiting the number of partitions and the refresh rate of the backlight module.
Innovation Solution
A driving method for a liquid crystal display apparatus that includes generating and sending dimming data groups to a backlight driver, which then sends driving configuration information to signal channels controlled by microchips, allowing each microchip to acquire driving data and control light emitting zones accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the backlight module uses traditional driving methods, then the structure is simple, but the response delay to image data is at least one frame
Solution Approach 1:
The backlight module is divided into multiple independently controllable partitions, each with its own microchip. This segmentation allows different partitions to be driven at different times, enabling the backlight to respond to image data without one-frame delay by coordinating the switching of different partitions.
Solution Approach 2:
The system pre-processes and stores driving data for multiple partitions before actual display. By preparing the driving configuration information in advance and using buffering mechanisms, the backlight module can switch partitions ahead of time, eliminating the one-frame response delay.
2Productivity
If the backlight module responds to image data with one-frame delay, then the driving method is simple, but the refresh rate is limited
Solution Approach 1:
By dividing the backlight into multiple partitions that can be controlled independently, the system can refresh different partitions at different times within a single frame period. This allows the overall refresh rate to exceed the traditional one-frame-per-backlight limitation.
Solution Approach 2:
The system maintains continuous backlight illumination while rapidly switching between partitions. By keeping the backlight on and using fast switching of individual partitions, the system achieves high refresh rates without interrupting the overall backlight output, maintaining continuous useful action.
3Adaptability or versatility
If the backlight module uses traditional driving methods, then the number of partitions is limited, but the driving system is simple
Solution Approach 1:
The backlight module is divided into multiple independently controllable partitions, each equipped with its own microchip for independent control. This segmentation enables a high number of partitions to be managed systematically through standardized driving waveforms and timing control.
Solution Approach 2:
The system uses programmable parameters such as duty cycle, pulse width, and timing sequences to control different partitions. By changing these electrical parameters through software control rather than hardware reconfiguration, the system can accommodate a large number of partitions without proportionally increasing hardware complexity.
Data Source
AI summary
A driving method for a liquid crystal display apparatus includes generating and sending, by a system unit according to image data, respective ones of dimming data groups sequentially; and responding, by a backlight driver, to respective ones of the dimming data groups sequentially; where responding, by the backlight driver, to any one of the dimming data groups comprises: receiving the dimming data group, and sending driving configuration information to each of the signal channels according to the dimming data group. The driving configuration information of any one of the signal channels includes driving data and address related information of a selected microchip in the signal channel, and the selected microchip is the microchip that controls the light emitting zone corresponding to the dimming data in the dimming data group. The method further includes acquiring, by the selected microchip, the driving data according to the driving configuration information.