Stacked Semiconductor Transistors for High-Resolution Display Signal Management
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Solution Overview
Problem
The increasing demand for higher resolution in display devices has led to smaller pixel sizes and more complex circuit structures, posing challenges in achieving high-resolution displays while maintaining efficient signal transmission and light management.
Innovation Solution
A display device with a scan line, data line, and driving voltage line on a substrate, featuring transistors with stacked semiconductor layers of different crystalline states and a conductive pattern acting as a light blocking layer, along with a storage capacitor and auxiliary power lines, to facilitate high-resolution display and efficient signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size is decreased to achieve higher resolution, then the resolution is improved, but the circuit structure becomes more complicated and harder to manufacture
Solution Approach 1:
The active pattern is segmented into multiple semiconductor layers (first semiconductor layer and second semiconductor layer) with different crystalline states. This segmentation allows each layer to contribute differently to the transistor performance, enabling high-resolution display with manageable circuit complexity by distributing functions across layers.
Solution Approach 2:
Different regions of the semiconductor structure have different crystalline states - the first semiconductor layer has a first crystalline state while the second semiconductor layer has a second crystalline state. This local quality variation optimizes electrical properties in different regions, allowing the circuit to function effectively at smaller pixel sizes without excessive complexity.
2Measurement precision
If the pixel size is decreased to achieve higher resolution, then the resolution is improved, but the manufacturing precision required increases
Solution Approach 1:
The invention changes the crystalline state parameter of the semiconductor material by forming at least two semiconductor layers with different crystalline states. This parameter change enables the material to achieve desired electrical properties without requiring extremely precise dimensional control, thus reducing manufacturing precision requirements while maintaining high resolution.
Solution Approach 2:
The active pattern uses a composite structure of multiple semiconductor layers with different crystalline states. This composite material approach combines the advantages of different crystalline forms, allowing the device to achieve high resolution with relaxed manufacturing tolerances by leveraging the complementary properties of each layer.
3Reliability
If more circuit elements are added to maintain signal transmission in smaller pixels, then signal transmission is maintained, but the device complexity increases
Solution Approach 1:
The multi-layer semiconductor structure serves multiple functions simultaneously - it forms the active pattern for transistor operation, provides different crystalline states for optimized electrical properties, and enables both signal transmission and light emission control within a single integrated structure. This multi-functionality maintains signal transmission reliability without adding separate circuit elements that would increase complexity.
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
The solution enables the implementation of high-resolution displays by optimizing transistor structure and signal transmission, enhancing the display's ability to manage light and improve resolution without compromising on complexity.
Implementation Method 1
Each of the first and second transistors includes an active pattern with a stacked first semiconductor layer and a second semiconductor layer, which have different crystalline states
Implementation Method 2
The conductive pattern may be a light blocking layer that blocks light incident into a bottom of the substrate, on which no active pattern is provided
Implementation Method 3
forming an active pattern that includes a stacked first semiconductor layer and a second semiconductor layer having different crystalline states by depositing a semiconductor layer on the interlayer insulating layer and performing a crystallization process using laser
Data Source
AI summary
A display device includes a scan line that extends in a first direction on a substrate and that transmits a scan signal; a data line that extends in a second direction that intersects the first direction and that transmits a data signal; a driving voltage line that extends in the second direction and that transmits a driving voltage; a transistor that includes a second transistor connected to the scan line and the data line and a first transistor connected to the second transistor; a light emitting device connected to the transistor; and a conductive pattern disposed between the substrate and the first transistor, where each of the first and second transistors includes an active pattern with a stacked first semiconductor layer and a second semiconductor layer, which have different crystalline states.