Display Timing Controller EPI Output Control Using Horizontal-Line Comparison
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Solution Overview
Problem
Existing display devices face inefficiencies in power consumption due to the operation of timing controllers, which do not optimize data transmission based on image data similarities.
Innovation Solution
The display device employs a timing controller with first and second embedded panel interface (EPI) output units that selectively transmit different data through one or both units based on the similarity of consecutive horizontal lines' image data, optimizing power usage by stopping output when data is identical and resuming only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the timing controller continuously transmits all image data through both EPI output units, then complete image data is ensured to be transmitted, but power consumption increases due to unnecessary data transmission when consecutive horizontal lines are identical
Solution Approach 1:
The patent extracts and transmits only the necessary image data by comparing consecutive horizontal lines and identifying differences. When lines are identical, no data is transmitted; when they differ, only the different portions are transmitted. This extraction principle reduces power consumption by eliminating unnecessary data transmission while ensuring complete image data is delivered to the display panel.
Solution Approach 2:
The patent applies partial action by transmitting only the necessary portion of image data rather than all data continuously. By comparing consecutive horizontal lines and transmitting only when differences are detected, the system performs partial data transmission that reduces power consumption while maintaining complete image rendering capability.
2Loss of energy
If the timing controller stops output when consecutive horizontal lines are identical, then power consumption is reduced, but data transmission completeness may be compromised
Solution Approach 1:
The patent implements a feedback mechanism by comparing consecutive horizontal lines of image data to detect differences. This feedback loop determines whether data transmission should occur - transmission is activated only when differences are detected between consecutive lines, ensuring data completeness while reducing unnecessary transmissions when lines are identical, thus lowering power consumption.
3Loss of energy
If the timing controller transmits only different data through EPI output units, then power consumption is reduced by minimizing data transmission, but the complexity of detecting and managing data differences increases
Solution Approach 1:
The patent applies preliminary action by performing data comparison and difference detection before actual data transmission. The timing controller pre-processes image data by comparing consecutive horizontal lines and identifying differences in advance, which simplifies the subsequent transmission process and reduces power consumption by avoiding unnecessary transmissions.
Data Source
AI summary
A display device capable of efficiently using an output of a timing controller is discussed. The display device in one example includes a display panel including sub-pixels at intersections of horizontal lines and vertical lines, a timing controller configured to output left image data among data of the horizontal lines through a first embedded panel interface (EPI) output unit and output right image data among the data of the horizontal lines through a second EPI output unit, and a data driver configured to output data voltages to data lines based on the left image data and the right image data. Accordingly, it is possible to reduce power consumed by the display device by efficiently using the output of the timing controller.