Sub-Pixel Scan Driver Integration to Reduce Display Dead Space
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Solution Overview
Problem
Existing display devices, particularly head-mounted displays, face challenges in reducing the size of the dead space area where scan drivers are disposed, which affects their compactness and efficiency.
Innovation Solution
The integration of a scan driver within the sub-pixel structure, utilizing transistors that are controlled by a single scan driver, reduces the need for multiple scan drivers and minimizes the space required for their disposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple scan drivers are used to control different transistors in a sub-pixel, then the control functionality is complete, but the dead space area increases
Solution Approach 1:
The patent merges multiple scan drivers into a single scan driver by integrating the control functions for EL1, EL2, and EL3 directly within the sub-pixel structure. The first, second, and third transistors are all controlled by scan signals from the same scan driver, eliminating the need for separate scan drivers for each transistor and thereby reducing the dead space area.
Solution Approach 2:
The scan driver functionality is nested within the sub-pixel structure itself. By embedding the control logic and transistor arrangements inside the sub-pixel, the patent effectively places the scan driver function within the active display area, reducing the external dead space required for driver placement.
2Device complexity
If scan drivers are disposed in a separate dead space area, then the sub-pixel structure is simple, but the overall device compactness is reduced
Solution Approach 1:
The patent transitions from a planar arrangement where scan drivers are disposed externally in dead space to a vertical/integrated arrangement where scan driver functionality is embedded within the sub-pixel layers. This dimensional reorganization allows the control functions to coexist with the display elements in the same spatial footprint, improving device compactness.
3Area of stationary object
If a single scan driver controls multiple transistors in a sub-pixel, then the dead space area is reduced, but the scan driver integration complexity increases
Solution Approach 1:
The single scan driver is designed with universal control capability to drive multiple transistors (first, second, and third transistors) within the sub-pixel. By making the scan driver multi-functional, the patent eliminates the need for separate drivers while managing the integration complexity through a unified control architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This integration effectively reduces the non-display area where scan drivers are located, enhancing the compactness and efficiency of display devices.
Implementation Method 1
a light emitting element that receives the driving current to emit light
Data Source
AI summary
A sub-pixel is disclosed that includes first, second, and third transistors, and a light emitting element. The first transistor is connected between a first node that receives a first driving power and a second node to generate a driving current and includes a control electrode connected to a third node. The second transistor is connected between a data line and the first node and turned on in response to a first scan signal. The third transistor is connected between the second node and the third node and turned on in response to the first scan signal. The light emitting element receives the driving current to emit light.