Display Data Processing With Clock Retraining After Lock-Fail

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Solution Overview

Problem

As the number of pixels and frame rate increase in display panels, the amount of image data transmitted per unit time also increases, leading to potential signal distortion due to external noise, causing data driving devices to restore abnormal data, necessitating quick restoration of communication states.

Innovation Solution

A data processing device and data driving device configuration that switches between low-speed and high-speed communication modes, with retransmission of clock training patterns upon lock-fail, and the use of lock monitoring techniques to quickly restore communication states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If high-speed communication mode is used to transmit image data at high frame rates, then data transmission speed is improved, but signal distortion occurs due to external noise

Engineering Contradiction:
Improvedata transmission speedVSAvoidsignal accuracy
Core Design Contradiction:
SpeedVSReliability

Solution Approach 1:

The patent applies preliminary action by transmitting a clock training pattern before the actual image data to establish and synchronize the clock signal in advance. This preliminary clock training ensures that the receiver is properly synchronized before high-speed data transmission begins, preventing signal distortion caused by timing mismatches. The clock training pattern is sent at a controlled speed to establish reliable timing relationships before full-speed operation.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If clock training pattern is retransmitted upon lock-fail, then communication reliability is improved, but communication time is increased

Engineering Contradiction:
Improvecommunication reliabilityVSAvoidcommunication time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent implements feedback by continuously monitoring the lock status during clock training and using this information to determine whether to proceed with high-speed communication or retransmit the clock training pattern. The lock status signal provides real-time feedback on whether the clock synchronization is successful, allowing the system to adapt its behavior accordingly - proceeding to data transmission when locked successfully, or retraining when lock-fail occurs, thus optimizing the balance between reliability and time.

Inventive Principle:
Principle #23Feedback

3Reliability

If low-speed communication mode is used for configuration data, then signal distortion is reduced, but data transmission speed is decreased

Engineering Contradiction:
Improvesignal accuracyVSAvoiddata transmission speed
Core Design Contradiction:
ReliabilityVSSpeed

Solution Approach 1:

The patent applies dynamics by implementing variable communication speed based on the type of data being transmitted. Configuration data is transmitted at low-speed communication mode to ensure reliable reception and proper setup, while image data is transmitted at high-speed communication mode once the clock is trained and synchronization is established. This dynamic speed adjustment optimizes both reliability for configuration and speed for image data transmission.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS20250225951A1Data processing device, data driving device and display device including the same
Publication Date: 2025.07.10 LX SEMICON CO LTD
  • US20250225951A1 patent drawing
  • US20250225951A1 patent drawing
  • US20250225951A1 patent drawing

AI summary

The embodiment discloses a data processing device, a data driving device, and a display device, wherein the data processing device transmits configuration data in a low-speed communication mode, transitions to a high-speed communication mode after the low-speed communication mode to transmit control data and image data, and retransmits a clock training pattern while maintaining the high-speed communication mode upon receiving a lock-fail signal during the operation of the high-speed communication mode.