Display Driver Buffering for Black Insertion Data Transmission
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Solution Overview
Problem
In liquid crystal display (LCD) devices, the black insertion design for addressing streaking issues due to liquid crystal response time leads to insufficient data transmission time, causing risks of display tearing and insufficient charging, particularly in high-resolution applications like AR/VR products.
Innovation Solution
A method and device configuration that involves a display panel, processor, and driver with a buffer, where data for one frame image is split into subdata, with the processor outputting first subdata during display time and the buffer transmitting it to the panel during black insertion time, thereby increasing data transmission time and reducing the risk of display tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If black insertion design is adopted to solve liquid crystal response time issues, then display quality is improved, but data transmission time becomes insufficient
Solution Approach 1:
The patent applies preliminary action by transmitting and buffering data during the display time period before the black insertion period begins. The processor outputs data and the driver buffers it during display time, so that data transmission is completed before the black insertion period when the liquid crystal needs to respond. This resolves the contradiction by performing data transmission in advance, ensuring both sufficient transmission time and adequate response time during black insertion.
2Duration of action of moving object
If data transmission is performed during black insertion time, then liquid crystal response is completed, but data transmission time is insufficient causing display tearing
Solution Approach 1:
The patent performs data transmission and buffering during display time before the black insertion period, ensuring data is ready before the liquid crystal response period begins. This preliminary action prevents display tearing by completing data transmission in advance, while the black insertion period is fully available for liquid crystal response without time pressure.
Solution Approach 2:
The patent segments the frame period into distinct functional phases: display time for data transmission and buffering, and black insertion time for liquid crystal response. This segmentation allows each phase to be optimized independently - data transmission occurs during display time while liquid crystal response occurs during black insertion time, eliminating the conflict between these two requirements.
3Reliability
If data transmission time is increased, then display tearing is avoided, but black insertion time is reduced affecting liquid crystal response
Solution Approach 1:
The patent segments the frame period into display time and black insertion time, with data transmission occurring during display time and liquid crystal response occurring during black insertion time. This segmentation allows both functions to have sufficient time without conflict, as they operate in separate time windows within the same frame period.
Solution Approach 2:
The patent performs data transmission and buffering during display time as a preliminary action before the black insertion period. This ensures data is ready in advance, allowing the black insertion period to be fully dedicated to liquid crystal response without being encroached upon by data transmission requirements.
Data Source
AI summary
A display device and a driving method thereof are disclosed. The display device includes a display panel, a processor and a driver; the driver includes a buffer; time for displaying one frame image includes display time and black insertion time. The driving method of the display device includes: outputting data for displaying one frame image which includes first subdata by the processor, and transmitting the first subdata to the buffer by the processor within the display time; and bufferring the first subdata by the buffer within the display time, and transmitting the first subdata to the display panel by the buffer within the black insertion time.