Reflective Display Panel Object Detection
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Solution Overview
Problem
Existing display devices that switch between reflective and transmissive states often experience reduced reflectivity when a touch panel is added, making it difficult to detect nearby objects effectively.
Innovation Solution
A display device comprising a display panel and a front surface panel that can switch between reflective and transmissive states, with the front surface panel capable of detecting objects by using a combination of polarizing members, optical sheets, and liquid crystal layers to manage light polarization and reflection, allowing for object detection without a touch panel, thus maintaining reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a touch panel is placed on the display device, then object detection capability is improved, but reflectivity in the reflective state deteriorates
Solution Approach 1:
The patent merges the object detection function with the front surface panel itself by embedding detection electrodes within the panel structure. This integration eliminates the need for a separate touch panel layer, thereby maintaining high reflectivity while enabling accurate object detection through the panel's inherent electrode network.
Solution Approach 2:
The front surface panel is designed to serve multiple functions simultaneously: it acts as both the reflective surface for mirror mode and the detection surface for object detection. The detection electrodes are incorporated into the panel structure, allowing the same component to perform both optical reflection and capacitive sensing without requiring additional layers that would compromise reflectivity.
2Adaptability or versatility
If the front surface panel switches between reflective and transmissive states, then display versatility is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic switching capability in the front surface panel, allowing it to change between reflective and transmissive states as needed. The liquid crystal layer within the panel can be electrically controlled to adjust its optical properties, enabling the device to adapt to different usage scenarios (mirror mode or display mode) while managing power consumption through selective activation of the switching function.
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 detection of nearby objects while preventing a decrease in reflectivity, allowing the device to function as both a display and a mirror, with reduced power consumption in the reflective state.
Implementation Method 1
a liquid crystal layer that changes a polarization state of incident light
Implementation Method 2
front surface panel that is switched between a reflective state in which incident light is reflected and a transmissive state in which incident light is transmitted
Data Source
AI summary
The display device includes a display panel and a front surface panel that is superimposed with the display panel, and that is switched between a reflective state in which incident light is reflected and a transmissive state in which incident light is transmitted. The front surface panel can detect presence of an object to be detected.