Pixel Circuit With Oxide NMOS Emission Control for Lower Dead Space
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Solution Overview
Problem
Existing display devices face increased power consumption and dead space due to the increase in the number of gate signals and selection signals, which affect the gate driver and demultiplexer areas.
Innovation Solution
The display device incorporates a pixel structure with oxide n-channel metal oxide semiconductor (NMOS) transistors and a specific insulation layer thickness ratio, reducing the number of required signals by using an emission control transistor and selection transistors, thereby minimizing power consumption and dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of gate signals provided to each pixel increases, then the display device can better control the light-emitting element, but power consumption and the area of the gate driver increase
Solution Approach 1:
The emission control transistor combines multiple control functions into a single component that responds to both the second gate signal and the first emission signal. This merging of control functions reduces the number of separate gate signals needed, thereby reducing the area and power consumption of the gate driver while maintaining effective control of the light-emitting element.
Solution Approach 2:
The emission control transistor serves multiple purposes: it acts as a control element for the light-emitting element, a switching element for the first power voltage, and a response element to both gate signals and emission signals. This multi-functionality eliminates the need for separate dedicated components for each function, reducing overall device area and power consumption.
2Reliability
If the number of gate signals provided to each pixel increases, then the display device can better control the light-emitting element, but the area of the gate driver increases
Solution Approach 1:
The emission control transistor combines multiple control functions into a single component that responds to both the second gate signal and the first emission signal. This merging of control functions reduces the number of separate gate signals needed, thereby reducing the area and power consumption of the gate driver while maintaining effective control of the light-emitting element.
Solution Approach 2:
The emission control transistor serves multiple purposes: it acts as a control element for the light-emitting element, a switching element for the first power voltage, and a response element to both gate signals and emission signals. This multi-functionality eliminates the need for separate dedicated components for each function, reducing overall device area and power consumption.
3Reliability
If the number of selection signals increases, then the demultiplexer can better manage data lines, but power consumption and the area of the demultiplexer increase
Solution Approach 1:
The emission control transistor combines multiple control functions into a single component that responds to both the second gate signal and the first emission signal. This merging of control functions reduces the number of separate gate signals needed, thereby reducing the area and power consumption of the gate driver while maintaining effective control of the light-emitting element.
Solution Approach 2:
The emission control transistor serves multiple purposes: it acts as a control element for the light-emitting element, a switching element for the first power voltage, and a response element to both gate signals and emission signals. This multi-functionality eliminates the need for separate dedicated components for each function, reducing overall device area and power consumption.
4Reliability
If the number of selection signals increases, then the demultiplexer can better manage data lines, but the area of the demultiplexer increases
Solution Approach 1:
The emission control transistor combines multiple control functions into a single component that responds to both the second gate signal and the first emission signal. This merging of control functions reduces the number of separate gate signals needed, thereby reducing the area and power consumption of the gate driver while maintaining effective control of the light-emitting element.
Solution Approach 2:
The emission control transistor serves multiple purposes: it acts as a control element for the light-emitting element, a switching element for the first power voltage, and a response element to both gate signals and emission signals. This multi-functionality eliminates the need for separate dedicated components for each function, reducing overall device area and power consumption.
Data Source
AI summary
A display device includes a pixel. The pixel includes a light-emitting element, a first transistor which controls a driving current flowing through the light-emitting element, and including a gate connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node, a second transistor which transmits a data voltage to a fourth node in response to a first gate signal, a storage capacitor connected between the first node and the fourth node, and an emission control transistor which transmits a first power voltage to the second node in response to a second gate signal or a first emission signal, including a first gate which receives the first emission signal and a second gate which receives the second gate signal, and being an oxide n-channel metal oxide semiconductor (NMOS) transistor.