Display Panel Frame Request Control Module
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Solution Overview
Problem
Display devices face challenges in maintaining a desired refresh rate without relying on stored memory, as the transmission rate from the display source may not always match the refresh rate, leading to image degradation or the need for increased power consumption.
Innovation Solution
A display panel with a control module that requests previously transmitted display frames from the source when necessary, based on predefined criteria such as refresh rate, memory availability, or time constraints, without relying on a frame buffer for storage, thereby adjusting the transmission rate to match the refresh rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If display frames are stored in memory to maintain refresh rate, then display continuity is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent removes the frame buffer memory element from the display system entirely. Instead of storing display frames locally, the system extracts the continuity function by having the display source retransmit previous frames when requested, eliminating the need for local storage while maintaining display continuity.
Solution Approach 2:
The patent introduces a control module as an intermediary between the display source and display driver. This control module manages frame requests and coordinates retransmissions, replacing the traditional memory-based buffering approach with an active request-response mechanism.
2Speed
If display source transmits frames at higher rate to match refresh rate, then display refresh consistency is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic frame transmission only when necessary. The display source transmits frames at the refresh rate, and when frames are missed or late, the control module requests retransmission of specific previous frames, creating a periodic on-demand transmission pattern rather than continuous high-rate transmission.
Solution Approach 2:
The control module monitors the timing and receipt of display frames, and based on this feedback, dynamically requests retransmission of frames that were not received in time. This feedback mechanism ensures refresh consistency without requiring the display source to continuously transmit at maximum rate.
3Reliability
If frame buffer is used to store display frames, then image quality stability is improved, but device complexity and memory requirements increase
Solution Approach 1:
The patent completely removes the frame buffer memory element from the system. Image quality stability is maintained not through storage but through the control module's ability to request and receive retransmitted frames from the display source when needed.
4Productivity
If display source transmits all frames continuously, then display refresh rate is maintained, but data transmission efficiency decreases
Solution Approach 1:
Instead of continuously transmitting all frames, the system uses partial action by transmitting only the frames that are actually needed. The control module requests specific frames that were missed or late, avoiding unnecessary transmission of frames that would have been received anyway.
Data Source
AI summary
Embodiments of the invention generally provide a display panel that uses predefined criteria to determine when to send a request for a display frame to a display source. The predefined criteria may be, for example, when the display panel needs to refresh the display faster than the display source transmits display frames, when the display source fails to send a new display frame within a specified time period, when a maximum refresh time is exceeded and the displayed image begins to decay or leak, and the like. Furthermore, the display panel may include a frame buffer for storing the display frames received from the display source. Additional predefined criteria may be when the display frame stored in the frame buffer becomes corrupted or when the frame buffer lacks enough available memory to store the frame. In response, the display panel may request the display source retransmit the previous display frame.