Segmented Scan Driving for Multi-Frequency Display Panels
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption when displaying multiple images simultaneously, as they often operate at a single fixed frequency, leading to inefficient energy usage.
Innovation Solution
The display device employs a multi-frequency mode that divides the display area into different zones, each operating at distinct driving frequencies based on the type of content displayed, using a driving controller to manage scan stages and masking signals to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display device operates at a single fixed frequency to display multiple images simultaneously, then all display areas can be driven uniformly, but power consumption increases due to inefficient energy usage in areas displaying static or low-frequency content
Solution Approach 1:
The display panel is divided into multiple display areas (first display area, second display area, third display area) that can be driven at different frequencies. Each display area is controlled by separate scan driving circuits that receive independent start signals, enabling frequency segmentation based on content requirements.
Solution Approach 2:
The display device transitions from a fixed-frequency operation mode to a dynamic multi-frequency operation mode. The driving controller dynamically assigns different driving frequencies to different display areas based on the type of content being displayed, allowing the system to adapt its power consumption characteristics to the actual display needs.
2Use of energy by moving object
If the display device uses a multi-frequency mode with multiple start signals to reduce power consumption, then energy efficiency improves in specific display areas, but device complexity increases due to additional control circuits and signal management
Solution Approach 1:
The scan driving circuit is designed with multi-functionality to handle both single-frequency and multi-frequency operation modes. The same circuit structure can operate with one start signal for uniform driving or with multiple start signals for differentiated frequency control, reducing the need for separate dedicated circuits for each mode.
Solution Approach 2:
The driving controller automatically manages the generation and distribution of multiple start signals to the respective scan driving circuits based on the display content requirements. The system self-regulates the complexity management by intelligently determining when and where to apply multi-frequency control without requiring external intervention or complex manual configuration.
Data Source
AI summary
A display device includes a display panel including pixels connected to scan lines, a scan driving circuit including scan stages corresponding to the scan lines, respectively, where each of the scan stages receives a masking signal and a carry signal and outputs a scan signal, and a driving controller which divides the display panel into the first display area and the second display area, controls the scan driving circuit such that the first display area and the second display area operate with different frequencies, and outputs start signals provided at different timings. A first scan stage disposed in the first display area from among the scan stages receives a first start signal of the start signals as the carry signal, and a first scan stage disposed in the second display area from among the scan stages receives a second start signal of the start signals as the carry signal.