Polarizer Placement Between Sensor and Display Panel
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Solution Overview
Problem
Current display devices with integrated front sensors face a reduction in light collection quality due to light reflection from membranes between the sensor and the display panel, which superposes with external light, affecting the contrast ratio and light receiving quality of the sensor.
Innovation Solution
A display device is designed with a polarizer placed between the sensor and the display panel to absorb stray light parallel to its absorption axis, thereby reducing the luminous flux of stray light emitted to the sensor and improving its light receiving quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If membranes are arranged between the sensor and display panel, then the sensor is protected and integrated into the display device, but light reflection from these membranes reduces the light collection quality of the sensor
Solution Approach 1:
A polarizer is introduced as an intermediary component between the sensor and display panel. This polarizer selectively blocks reflected light (which is polarized) while allowing non-polarized or differently polarized ambient light to pass through to the sensor, thus maintaining sensor protection while improving light collection quality
Solution Approach 2:
The solution utilizes polarization properties of light (an optical property similar to color in its selective absorption characteristics) to differentiate between reflected light and ambient light. By aligning the polarizer's absorption axis with the polarization direction of reflected light, the system selectively transmits desired light while blocking harmful reflections
2Adaptability or versatility
If multiple membranes are placed between sensor and display panel, then the sensor is integrated with the display device, but the contrast ratio of light received by the sensor is reduced
Solution Approach 1:
The polarizer serves as a mediator that selectively filters light based on its polarization state. It allows the sensor to maintain integration with the display device while improving the contrast ratio by blocking polarized reflected light and allowing non-polarized ambient light to pass through
3Ease of manufacture
If membranes are arranged between sensor and display panel, then the display device structure is completed, but light receiving quality of the sensor is affected
Solution Approach 1:
The polarizer is introduced as an additional intermediary component that can be integrated into the existing display device structure. While it adds one more layer, it significantly improves light receiving quality by blocking reflected light, making it a worthwhile addition to the manufactured structure
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 addition of a polarizer between the sensor and the display panel effectively reduces stray light entering the sensor, enhancing its light receiving quality and maintaining the contrast ratio of the light received.
Implementation Method 1
A polarization direction of light emitted from the display device to the sensor includes, at least, a first polarization direction. The first polarization direction is parallel to an absorption axis of the polarizer.
Data Source
AI summary
A display device is provided. The display device includes a display panel, a sensor, and a polarizer. A polarization direction of light emitted from the display device to the sensor includes, at least, a first polarization direction. The first polarization direction is parallel to an absorption axis of the polarizer. By absorbing stray light parallel to the absorption axis of the polarizer, a luminous flux of the stray light emitted to the sensor is reduced, and a light receiving quality of the sensor is improved.