Gate Driver Merging for Narrow Display Frame Width
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Solution Overview
Problem
Conventional display devices require multiple gate drivers, resulting in a wide display frame perimeter that cannot be reduced, due to the need for separate regions for each gate driver system.
Innovation Solution
A display device with a gate driver that outputs one driving pulse per horizontal cycle, allowing shared use of driving pulses for initialization, reference, and write transistors across different rows, reducing the number of required gate driver systems and thus the display frame width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three gate driver systems are used to supply control signals to initialization transistor, reference transistor, and write transistor, then each transistor can be controlled independently, but the width of the display frame increases due to the need for separate regions for each gate driver
Solution Approach 1:
The patent merges three separate gate driver systems into a single integrated gate driver that supplies control signals to initialization transistors, reference transistors, and write transistors through time-division multiplexing. This consolidation eliminates the need for separate driver regions for each transistor type, thereby reducing the display frame width while maintaining reliable control signal supply to all transistors.
Solution Approach 2:
The single gate driver performs multiple functions by sequentially supplying control signals to different transistor types (initialization, reference, and write transistors) across different rows. This multi-functional design allows one driver circuit to replace three dedicated drivers, reducing the overall circuit footprint and display frame width while ensuring reliable operation of all transistor types.
2Reliability
If separate gate driver regions are provided for initialization transistor, reference transistor, and write transistor, then control signals can be supplied to each transistor, but the number of components increases and manufacturing complexity rises
Solution Approach 1:
The patent combines three separate gate driver systems into one integrated gate driver that uses time-division multiplexing to supply control signals to initialization transistors, reference transistors, and write transistors. This merging reduces the number of components and simplifies the overall gate driver architecture while maintaining the capability to control each transistor type reliably through sequential signal delivery.
Solution Approach 2:
The single gate driver is designed with universal functionality to perform multiple tasks: it sequentially supplies control signals to initialization transistors in one row, then to reference transistors in another row, and finally to write transistors in a third row. This multi-functional design reduces component count and manufacturing complexity while preserving full transistor control capability.
3Length of stationary object
If one driving pulse is supplied per vertical cycle to initialization transistors in different rows, then the gate driver region can be minimized, but the control signal timing becomes more complex
Solution Approach 1:
The patent employs periodic action by supplying one driving pulse per vertical cycle to initialization transistors in different rows sequentially. The gate driver operates in a cyclic manner, first activating initialization transistors in one row, then moving to reference transistors in another row, and finally to write transistors in a third row. This periodic operation minimizes the gate driver region width while managing timing complexity through systematic sequential activation.
Data Source
AI summary
A display device includes: a display portion including a plurality of pixel circuits arranged in a matrix; and a gate driver that outputs one driving pulse for each horizontal cycle. The plurality of pixel circuits each include subpixel circuits each including a light emitting element, a driving transistor that supplies a current to the light emitting element, a write transistor, a reference transistor, and an initialization transistor. The one driving pulse is input per vertical cycle from the gate driver to the initialization transistor included in each of a plurality of rows in the plurality of pixel circuits, and the one driving pulse input to the initialization transistors included in mutually different rows among the plurality of rows is input to each of the write transistor and the reference transistor, the mutually different rows being other than a row in which the write transistor and the reference transistor are included.