Multi-Frequency Display Driving Controller for Mixed Content
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Solution Overview
Problem
Existing display devices face challenges in improving image quality and reducing power consumption, particularly in managing different image types across various display areas.
Innovation Solution
A display device and driving method that utilize a multi-frequency mode, where a display panel is divided into areas driven by different frequencies, with a driving controller managing these frequencies to optimize image display and power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single driving frequency is used for the entire display panel, then the device complexity is low and ease of operation is high, but image quality deteriorates when displaying mixed static and dynamic content
Solution Approach 1:
The display panel is divided into multiple display areas (first display area and second display area), each driven by different driving frequencies. The driving controller selectively applies a first driving frequency to the first display area and a second driving frequency to the second display area, allowing optimized image quality for different content types while managing complexity through spatial segmentation.
Solution Approach 2:
Different display areas are assigned different driving frequencies based on their specific content requirements. The first display area may use a higher frequency for dynamic content while the second display area uses a lower frequency for static content, optimizing image quality locally for each area's specific needs.
2Use of energy by stationary object
If a single driving frequency is used for the entire display panel, then the device complexity is low, but power consumption increases due to inability to optimize for static content
Solution Approach 1:
The display panel is segmented into different display areas with different power consumption characteristics. By assigning different driving frequencies to different areas based on content type (static vs. dynamic), the system optimizes overall power consumption while managing complexity through area-based control.
Solution Approach 2:
The driving frequency parameter is dynamically changed based on content type and display area. The driving controller adjusts the driving frequency from a first frequency to a second frequency depending on whether the content is static or dynamic, optimizing power consumption by using lower frequencies for static content.
3Use of energy by stationary object
If driving frequency is changed abruptly from first frequency to second frequency, then power consumption can be optimized, but image quality deteriorates due to frequency transition artifacts
Solution Approach 1:
Before changing the driving frequency from the first frequency to the second frequency, the driving controller performs preliminary actions including displaying a black screen for a predetermined period and/or performing image compensation. These preliminary actions prepare the display system for frequency transition, preventing visible artifacts and maintaining image quality during the transition.
Solution Approach 2:
The driving controller applies compensatory measures before frequency transition, such as displaying black screens or performing image compensation processing. These cushioning actions mitigate the impact of abrupt frequency changes on image quality, ensuring smooth transitions without visible artifacts.
4Manufacturing precision
If multi-frequency mode is implemented, then image quality improves for mixed content display, but device complexity increases due to frequency management
Solution Approach 1:
The display panel is divided into multiple display areas that can be independently controlled with different driving frequencies. This segmentation allows the system to optimize image quality for different content types while simplifying control by managing frequency settings at the area level rather than requiring complex pixel-level control.
Solution Approach 2:
The driving controller is designed to perform multiple functions: it can operate in a first mode using a single driving frequency for the entire panel, and in a second mode using different driving frequencies for different display areas. This multi-functionality allows the system to adapt to different content types and power requirements while maintaining ease of operation through a unified control interface.
Data Source
AI summary
A display device which includes a display panel that includes a first display area and a second display area, and a driving controller. During a multi-frequency mode, the driving controller drives the first display area by using a first driving frequency and drives the second display area by using a second driving frequency. During the multi-frequency mode, when the second driving frequency changes from a first frequency to a second frequency, the driving controller drives the first display area and the second display area during at least one frame by using a base frequency, drives the first display area and the second display area during at least one second frame by using an intermediate frequency between the base frequency and the second frequency, and then drives the first display area by using the first driving frequency and drives the second display area by using the second frequency.