Dual Panel Display Driving Method Using Multiplexer Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional flat panel display (FPD) devices with dual-display functionality require double the number of scan lines and pins due to independent driving circuits for main and sub-panels, leading to increased device size.
Innovation Solution
A flat panel display device with a single scan driver and multiplexers that switch between two sub-arrays of pixels using control signals, allowing for dual-panel display without increasing the number of pins or scan drivers by alternating the connection of scan lines between the sub-arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-panel FPD device uses independent driving circuits for main and sub-panels, then dual display function is achieved, but the number of scan lines and pins doubles, resulting in increased device size
Solution Approach 1:
The patent merges the driving circuits of the main panel and sub-panel into a single shared scan driver. The scan driver sequentially drives both panels using time-division multiplexing, where odd scan lines drive the main panel and even scan lines drive the sub-panel. This consolidation eliminates the need for separate scan drivers for each panel, reducing the number of pins and overall device size while maintaining dual display functionality.
Solution Approach 2:
The patent introduces dynamic switching mechanisms (multiplexers) that dynamically connect different scan line groups to the shared scan driver based on the driving phase. During odd frames, odd scan lines are connected to the main panel; during even frames, even scan lines are connected to the sub-panel. This dynamic reconfiguration allows a single scan driver to serve multiple panels with different requirements.
2Adaptability or versatility
If a dual-panel FPD device uses double the number of scan lines, then independent panel driving is achieved, but the complexity of the scan driver increases
Solution Approach 1:
The patent segments the scan lines into two distinct groups: odd-numbered scan lines for the main panel and even-numbered scan lines for the sub-panel. This segmentation is implemented through multiplexers that can selectively connect either odd or even scan lines to the shared scan driver. The segmentation allows independent control of each panel while using a unified driving architecture, reducing overall system complexity.
Solution Approach 2:
The shared scan driver is designed with universal functionality to drive both the main panel and sub-panel. By implementing time-division multiplexing and using control signals to switch between panel groups, the single scan driver performs the functions of what would traditionally require two separate drivers, simplifying the overall driver architecture.
3Area of stationary object
If a single scan driver is shared between two panels, then device size is reduced, but the scan driver must sequentially switch between panels
Solution Approach 1:
The patent implements periodic switching between the main panel and sub-panel using frame-based time-division multiplexing. The scan driver operates in periodic cycles, dedicating odd frames to the main panel and even frames to the sub-panel. This periodic action ensures that each panel receives continuous refresh cycles while sharing the same scan driver resources, minimizing switching overhead through regular, predictable timing patterns.
Data Source
AI summary
A flat panel display device for dual-panel display that comprises an array of pixels formed in rows and columns, a first sub-array of the array of pixels for image display in a first direction, a second sub-array of the array of pixels for image display in a second direction, at least one scan driver for sequentially scanning the array of pixels row by row, and a plurality of multiplexers, connectable to receive a control signal having a first state and a second state, for connecting the first sub-array of pixels to the at least one scan driver in response to the first state of the control signal, and connecting the second sub-array of pixels to the at least one scan driver in response to the second state of the control signal.