Integrated Display Pixel for Bio-Sensing and Image Output
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Solution Overview
Problem
Existing devices with displays and optical sensors face challenges in achieving a compact size due to the separate mounting of image-displaying screens and light-sensing components, which complicates the integration of bio-information measurement functions.
Innovation Solution
A display with an array of unit pixels, each comprising a light source pixel and a detector pixel, operated in multiple modes to simultaneously display images and acquire optical signals, utilizing a controller to manage light source and detector drivers, and a converter to process optical signals into digital data for bio-information estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate mounting of display and optical sensor is used, then image display function is achieved, but device size increases and integration difficulty increases
Solution Approach 1:
The patent merges the display function and optical sensing function into a single integrated structure. Each pixel unit contains both a light-emitting element (for display) and a light-receiving element (for sensing), eliminating the need for separate mounting of display and optical sensors. This integration directly reduces device volume and simplifies manufacturing by consolidating two previously separate subsystems into one unified pixel structure.
Solution Approach 2:
The pixel structure is designed to perform multiple functions: it can emit light for display purposes and simultaneously receive light for optical sensing applications. The light-emitting element and light-receiving element work in different time slots or modes within the same pixel unit, enabling the device to function as both a display and a bio-information sensor without requiring separate components.
2Adaptability or versatility
If separate mounting of display and optical sensor is used, then image display function is achieved, but device complexity increases
Solution Approach 1:
By combining the display and optical sensing functions into a single integrated pixel structure, the patent reduces structural complexity. Instead of managing separate display modules and optical sensor assemblies with their own mounting, wiring, and control systems, the invention uses a unified pixel structure where light-emitting and light-receiving elements are embedded within the same pixel unit, simplifying the overall device architecture.
Solution Approach 2:
The multi-functional pixel design allows the same structural unit to serve dual purposes: displaying images through light emission and acquiring optical signals through light reception. This universality reduces device complexity by eliminating the need for separate functional modules, reducing the number of components, and simplifying the control system that manages both display and sensing operations.
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
Enables compact integration of bio-information measurement capabilities by allowing the same display to function in image display, optical signal acquisition, and bio-information estimation modes, enhancing the device's versatility and efficiency.
Implementation Method 1
the detector pixel includes a photodiode (PD) pixel which receives light scattered or reflected from an object, and converts the received light into an electric signal
Implementation Method 2
the light source pixel includes one or more light emitting diode (LED) pixels which emit light of one or more wavelengths
Data Source
AI summary
A display includes a display portion formed of an array of unit pixels that each respectively include a light source pixel and a detector pixel. The display includes a control driver including a light source driver and a data driver which are respectively connected to each light source pixel, and a detector driver which is connected to each detector pixel. The display includes a controller configured to control the control driver to operate the display portion in a first mode, a second mode, and a third mode that are each different from each other.