Gate Driving Circuit for Flexible Display Power Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Foldable displays face increased power consumption due to larger screen sizes, leading to reduced battery life, as the load on the display panel increases significantly, necessitating larger batteries to compensate for the higher power demands.
Innovation Solution
A gate driving circuit that allows for adjustable activated areas and reduced power consumption by varying the driving frequency, utilizing a first shift register for delayed scan signals, a second shift register with cascaded light emission signal transfer parts, and a control block to generate control signals for designating on-driving and off-driving signal transfer parts, enabling selective activation and deactivation of screen areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the screen size of the flexible display is increased to provide larger display area, then the display area is improved, but the power consumption increases significantly
Solution Approach 1:
The display screen is divided into multiple regions (first region and second region) with different driving frequencies. The first region operates at a first driving frequency while the second region operates at a second driving frequency that is different from the first. This segmentation allows different parts of the display to consume different amounts of power, enabling the system to provide a large display area while reducing overall power consumption by operating certain regions at lower frequencies when full performance is not needed across the entire screen.
2Speed
If the driving frequency is increased to improve display performance, then the display performance is improved, but the power consumption increases
Solution Approach 1:
The display system dynamically adjusts the driving frequency in different regions based on operational requirements. The gate driving circuit is configured to operate the first region at a first driving frequency and the second region at a second driving frequency. This dynamic frequency adjustment allows the system to optimize power consumption by using lower driving frequencies in regions where full performance is not required, while maintaining higher frequencies in regions that require better display performance.
3Device complexity
If the activated area is fixed to simplify control, then the control complexity is reduced, but the adaptability to different display needs is limited
Solution Approach 1:
The gate driving circuit incorporates dynamic control capabilities that allow the activated area and driving parameters to be adjusted based on different operational modes. The circuit can selectively activate different regions (first region and second region) and apply different driving frequencies to each region. This dynamic adaptability enables the display to accommodate various display needs and screen sizes without requiring complete redesign of the control system, as the same circuit can be reconfigured for different operating scenarios.
Data Source
AI summary
Disclosed herein are a gate driving circuit and a flexible display using the same. In gate driving circuit, a control block including an nth controller configured to generate one among a gate-off voltage, an EM start signal, and a carry signal from a (n-1)th EM signal transfer part as an nth EM output control signal to apply the nth EM output control signal to a start terminal of an nth EM signal transfer part on the basis of an nth scan signal (n is a natural number) from the first shift register, a first control signal designating an off-driving signal transfer parts and an on-driving signal transfer parts among the EM signal transfer parts, a second control signal designating a first on-driving signal transfer part, and a third control signal designating second to last on-driving signal transfer parts.