Display Driving Controller Using Frame Type Flags for Black Image Insertion
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Solution Overview
Problem
Display apparatuses face challenges in maintaining display quality when operating in a mode that inserts black image frames between normal image frames, leading to potential malfunctions and decreased performance due to incorrect frame type identification by the driving controller.
Innovation Solution
The display apparatus includes a driving controller that receives input image data with alternating normal and black image frames, using flags to accurately identify frame types and adjust grayscale, with components like net power controllers, logo compensators, screen savers, and global current managers to generate intermediate image data and data voltages, preventing malfunctions and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If black image frames are inserted between normal image frames to reduce motion blur, then display quality is improved, but the driving controller may incorrectly identify frame types leading to malfunctions and decreased performance
Solution Approach 1:
A flag signal is introduced as an intermediary element to clearly indicate the type of each frame (normal or black) to the driving controller. This flag acts as a mediator between the image data source and the controller, eliminating ambiguity in frame type identification and preventing controller malfunctions while allowing black frame insertion to proceed for motion blur reduction.
2Productivity
If the driving controller processes alternating normal and black image frames, then motion blur is reduced, but incorrect frame type identification causes malfunctions
Solution Approach 1:
The flag indicating frame type is prepared in advance along with the image data, before the driving controller processes the frames. This preliminary provision of frame type information allows the controller to correctly identify and process each frame type (normal or black) without confusion, enabling motion blur reduction through black frame insertion while maintaining operational stability.
3Measurement precision
If flags are used to identify frame types and adjust grayscale, then frame processing accuracy is improved, but device complexity increases
Solution Approach 1:
The frame type identification is segmented into a separate flag signal that is processed independently from the main image data. This segmentation allows the driving controller to handle frame type identification and grayscale adjustment as distinct operations, improving accuracy while managing complexity through modular processing of the flag signal separate from the image content.
Data Source
AI summary
A display apparatus includes: a display panel; a driving controller, which receives input image data including a plurality of normal image frames and a plurality of black image frames, receives a flag indicating a type of each of frames included in the input image data, generates intermediate image data by adjusting a grayscale of the input image data based on the input image data and the flag, and generates a data signal based on the intermediate image data where the type includes a normal image frame and a black image frame; and a data driver, which generates a data voltage based on the data signal and outputs the data voltage to the display panel.