Integrated CPU Display Device Pixel Defect Correction
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Solution Overview
Problem
Existing display devices for augmented and virtual reality struggle with pixel defects, such as bright spots or dark spots, which diminish the sense of immersion and realistic sensation. Additionally, integrating arithmetic devices like CPUs with display devices increases device size and can lead to heat-related impairments of the display function.
Innovation Solution
A display device with a novel structure comprising a pixel circuit, a driver circuit, and a functional circuit, where the driver circuit outputs signals for display in the pixel circuit, and the functional circuit includes a CPU with a flip-flop electrically connected to a backup circuit. The CPU corrects image signals based on current flowing through the pixel circuit, effectively addressing pixel defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If arithmetic processing for correcting pixel defects is performed by a separate CPU, then pixel defect correction is improved, but device size increases
Solution Approach 1:
The patent combines the CPU and display device into a single integrated unit, where the CPU is positioned adjacent to the display device within the same housing. This merging eliminates the need for separate arithmetic processing devices while maintaining pixel defect correction capabilities, thus reducing overall device size.
Solution Approach 2:
The integrated CPU-display device serves multiple functions: it performs arithmetic processing for pixel defect correction while also controlling the display device itself. This multi-functionality eliminates the need for separate dedicated devices, reducing device volume while maintaining correction capabilities.
2Reliability
If arithmetic processing is performed by a separate CPU, then pixel defect correction is improved, but heat generated from the CPU impairs display function
Solution Approach 1:
The patent positions the CPU adjacent to the display device within the same housing, creating a localized thermal management zone. This spatial arrangement allows for targeted heat dissipation solutions near the CPU while protecting the display function from excessive heat, addressing the thermal impairment issue locally.
Solution Approach 2:
The housing structure serves as an intermediary element that separates and manages the thermal environments of the CPU and display device. By strategically designing the housing layout, the patent mediates between the heat generation from the CPU and the heat-sensitive display function, preventing thermal impairment.
3Volume of moving object
If arithmetic device and display device are integrated, then device size is reduced, but layout flexibility of arithmetic device is lost
Solution Approach 1:
The patent segments the integrated device into distinct functional modules: the CPU portion and the display device portion, positioned adjacent to each other within the housing. This segmentation maintains layout flexibility by allowing independent design and arrangement of each module while achieving compact integration.
Solution Approach 2:
The patent transitions from a planar layout to a three-dimensional spatial arrangement, positioning the CPU and display device in different spatial zones within the housing. This dimensional approach provides layout flexibility while achieving compact integration, as components can be arranged vertically or in three-dimensional space rather than being constrained to a single plane.
Data Source
AI summary
A display device excellent in downsizing, reduction in power consumption, or layout flexibility of an arithmetic device is provided. The display device includes a pixel circuit, a driver circuit, and a functional circuit. The driver circuit has a function of outputting an image signal for performing display in the pixel circuit. The functional circuit includes a CPU including a CPU core including a flip-flop electrically connected to a backup circuit. The display device includes a first layer and a second layer. The first layer includes the driver circuit and the CPU. The second layer includes the pixel circuit and the backup circuit. The first layer includes a semiconductor layer including silicon in a channel formation region. The second layer includes a semiconductor layer including a metal oxide in a channel formation region. The CPU has a function of correcting the image signal in accordance with the amount of current flowing through the pixel circuit.