Display Driver Adjusting Scan Lines for High Refresh Rate
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Solution Overview
Problem
Current display technologies face challenges in increasing refresh rates without upgrading hardware, leading to higher production costs for high-refresh displays, which are not economically viable for scenarios that do not require high refresh rates.
Innovation Solution
A display device and driving method that adjust the number of scan lines and data lines in the blank regions to match higher refresh rates without changing the hardware, allowing the display to operate within the existing clock frequency range, thereby enabling higher refresh rates without upgrading the chip hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-refresh display hardware is used to increase refresh rate, then display refresh rate is improved, but production cost increases
Solution Approach 1:
The patent changes the operating parameters of the display driver by dynamically adjusting the number of driven data lines and scan lines based on the required refresh rate. When high refresh rates are needed, the system reduces the number of active data lines and scan lines, allowing existing hardware to operate at higher refresh rates without physical upgrades, thus resolving the contradiction between refresh rate and production cost
Solution Approach 2:
The patent introduces dynamic adjustment capability where the display driver can adaptively change the quantity of driven data lines and scan lines according to different refresh rate requirements. This dynamic parameter adjustment allows the same hardware to serve multiple refresh rate scenarios, eliminating the need for expensive high-refresh hardware in standard applications
2Adaptability or versatility
If the number of data lines and scan lines is reduced to match clock frequency, then hardware compatibility is improved, but display resolution deteriorates
Solution Approach 1:
The patent applies partial action by selectively driving only a subset of data lines and scan lines based on the available clock frequency and required refresh rate. Instead of driving all lines, the system drives only the necessary number (e.g., 720 data lines out of 1080, or 1080 scan lines out of 2160), achieving hardware compatibility while maintaining adequate display quality for the given constraints
Solution Approach 2:
The system dynamically changes the parameters of driven data lines and scan lines to match the available clock frequency. By adjusting these parameters in real-time, the system achieves compatibility with existing hardware while maintaining the highest possible display resolution under the given constraints
Data Source
AI summary
A display device and a driving method thereof are disclosed. The display device includes a display panel and a driving circuit. The driving circuit includes a receiving module and a driving module. The receiving module is used to receive a setting signal for setting a refresh rate of F. The driving module is coupled to the receiving module and is used to drive the data lines and scan lines in the display panel. When (H×V×F)/N>T1, the driving module drives the display panel with H′ as the total number of rows of the scan lines, and with V as the total number of columns of data lines. The H′×V′<H×V, and T1′=(H′×V′×F)/N≤T1. H×V satisfies H×V<T×N/F, where F≥48 hz.