Integrated Display and Optical Sensor Panel for Multifunction Sensing
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Solution Overview
Problem
Existing display devices with touch sensors face challenges in accurately sensing external light due to the separate placement of light-receiving elements, which increases manufacturing costs and reduces yield. Additionally, these devices require multiple accessories and software installations for multifunctionality, limiting versatility and increasing complexity.
Innovation Solution
A semiconductor device is developed where a matrix display portion and a matrix optical sensor portion are formed over one substrate, with driver circuits for both the display and optical sensor integrated into a single chip. This configuration allows for the incorporation of functions like barcode reading, fingerprint authentication, and touch sensing without the need for separate components or accessories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-receiving element is provided separately from the display panel, then brightness sensing function is achieved, but device complexity increases and manufacturing cost rises
Solution Approach 1:
The patent combines the light-receiving element with the display panel by forming both over the same substrate. The optical sensor portion is integrated into the display device structure, eliminating the need for separate light sensing components while maintaining the brightness sensing function.
Solution Approach 2:
The display device is designed to perform multiple functions including display, touch sensing, and optical sensing using integrated components. The same substrate supports both display pixels and optical sensors, enabling multifunctionality without increasing device complexity.
2Adaptability or versatility
If a light-receiving element is provided separately from the display panel, then brightness sensing is possible, but manufacturing yield reduces
Solution Approach 1:
By forming both the display portion and optical sensor portion over the same substrate using the same manufacturing process, the patent eliminates separate assembly steps and reduces manufacturing complexity, thereby improving production yield and efficiency.
3Adaptability or versatility
If multiple accessories and software are installed for multifunctionality, then device functionality increases, but device complexity increases
Solution Approach 1:
The patent implements multiple functions (display, touch sensing, optical sensing, barcode reading, fingerprint authentication) within a single integrated device structure. All sensing functions are built-in using the same substrate and manufacturing process, eliminating the need for separate accessories and software installations.
4Adaptability or versatility
If multiple semiconductor integrated circuits are mounted separately, then device functionality increases, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple semiconductor functions into a single integrated circuit formed over one substrate. The display circuit and optical sensor circuit are manufactured together using the same process steps, reducing the number of separate components and lowering manufacturing costs.
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 integrated solution reduces the number of components, improves packaging efficiency, and enhances multifunctionality in display devices. It enables accurate light sensing and touch functionality, even in outdoor conditions, while simplifying manufacturing and reducing costs.
Implementation Method 1
A light-receiving element such as a photodiode is provided separately from the display panel to sense the brightness in the surroundings of the display panel
Data Source
AI summary
To achieve multifunctionality, a large number of components and the time and effort for implementing the components are required, which leads to an increase in the manufacturing cost and a reduction in yield. A matrix display portion and a matrix optical sensor portion are formed over one substrate. In addition, a driver circuit of the display portion and a driver circuit of the optical sensor portion formed over the same substrate as that for the display portion are built in one chip, whereby the number of components can be reduced. When the optical sensor is formed in a display panel, a barcode reader function or a scanner function can be given to the display panel. Furthermore, a function of authenticating fingerprints or the like or an input/output function of a touch sensor can be given to the display panel.