Bi-directional Scan Driver Circuit Area Reduction
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Solution Overview
Problem
Existing bi-directional scan drivers for AMOLED displays increase panel D/S due to complex circuit designs and a higher number of elements, making them unsuitable for applications like portable communication devices and digital imaging devices that require improved viewing angles and reversible display panels.
Innovation Solution
A bi-directional scan driver with a simplified circuit configuration that reduces the driving circuit area by using shift registers to transmit scan signals in both forward and backward directions, along with an initialization control driver to initialize pixel voltages, allowing for efficient pixel driving and reduced panel D/S.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bi-directional scan driver is implemented to improve viewing angle characteristics and enable reversible display panels, then the viewing angle and adaptability are improved, but the circuit complexity and panel D/S increase
Solution Approach 1:
The scan driver is designed to perform multiple functions: it can drive pixels in forward direction, backward direction, and handle both normal and inverted image display modes. The same hardware circuitry is utilized for different scanning directions and display orientations, eliminating the need for separate dedicated circuits for each function and thereby reducing overall circuit complexity.
Solution Approach 2:
The scan driver incorporates dynamic control capabilities to switch between forward and backward scanning directions based on display requirements. The circuit can dynamically adjust its operation mode (normal or inverted image) without requiring physical reconfiguration, allowing the display panel to adapt to different installation positions and viewing angle requirements while maintaining a compact circuit design.
2Ease of manufacture
If the scan driver circuit is simplified to reduce panel D/S, then the manufacturing cost and area are reduced, but the capability to support bi-directional scanning may be compromised
Solution Approach 1:
The simplified scan driver circuit is designed with multi-functional capabilities that allow it to perform both forward and backward scanning operations using the same hardware components. This universal design enables the circuit to support bi-directional scanning without requiring additional elements, thereby reducing panel D/S and manufacturing cost while maintaining full bi-directional scanning capability.
Solution Approach 2:
The circuit design merges the functions of forward scanning, backward scanning, and direction control into a single integrated scan driver structure. By combining these functions that would traditionally require separate circuits, the panel D/S is reduced while the bi-directional scanning capability is preserved through intelligent signal routing and control logic.
Data Source
AI summary
A display device and a driving method thereof are provided. The display device includes: a display unit including a plurality of pixels; a scan driver for transmitting scan signals to the plurality of pixels; a data driver for transmitting data signals to the plurality of pixels; and an initialization control driver for generating and transmitting an initialization signal to initialize data voltages corresponding to the data signals of a previous frame charged in the plurality of pixels during a first period of one frame.