Source Driver Data Transfer Frequency Optimization
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Solution Overview
Problem
As display devices increase in size and resolution, the distance between the timing controller and source drivers grows, leading to deteriorated signal integrity of display data signals, necessitating increased source drivers to manage data transfer within a horizontal period, which is inefficient.
Innovation Solution
A display device configuration where source drivers are connected via different data transfer frequencies, with closer drivers receiving data at higher frequencies and farther drivers at lower frequencies, allowing for efficient data distribution and reducing the need for additional source drivers by utilizing line memories for data storage and peer-to-peer transfers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the distance between the timing controller and source driver is increased to accommodate larger display devices, then the display device size increases, but the signal integrity of the display data signal deteriorates
Solution Approach 1:
Source drivers arranged at intermediate positions between the timing controller and the farthest source driver serve as mediators. These intermediate source drivers receive data from the timing controller at higher transfer frequencies and forward it to farther source drivers, thereby maintaining signal integrity over long distances by breaking the long transmission path into shorter segments.
2Productivity
If the number of source drivers is increased to manage data transfer within one horizontal period, then data transfer completeness improves, but the device complexity increases
Solution Approach 1:
Different source drivers are assigned different transfer frequencies based on their positions. Source drivers closer to the timing controller operate at higher transfer frequencies, while those farther away operate at lower frequencies. This local differentiation allows the system to maintain data transfer completeness within one horizontal period without uniformly increasing the number of source drivers.
3Reliability
If the data transfer speed is increased to maintain signal integrity, then the signal integrity improves, but the data amount that can be transferred within one horizontal period decreases
Solution Approach 1:
The transfer frequency is dynamically adjusted based on the position of each source driver. Source drivers closer to the timing controller use higher transfer frequencies to receive larger data amounts, while farther source drivers use lower transfer frequencies to maintain signal integrity. This dynamic adjustment allows the system to optimize both signal integrity and data transfer amount simultaneously.
Data Source
AI summary
In a display device, a timing controller is configured to transfer first display data and part of second display data to a first source driver via a first data transfer line at a high transfer frequency, and to transfer the remaining part of the second display data to a second source driver via the first data transfer line at a low transfer frequency, and the first source driver is configured to transfer the received part of the second display data to the second source driver via a second data transfer line.