Under-display distance sensing module with segmented infrared emitters
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Solution Overview
Problem
The challenge is to increase the screen-to-body ratio of electronic devices while preventing the front distance sensing module from interfering with the screen display, as arranging it on a non-display area increases the non-display area and can interfere with the display effect when placed below the display area.
Innovation Solution
The solution involves arranging the distance sensing module below the display area, incorporating an infrared receiver and multiple infrared emitters, where each emitter's energy is less than the excitation threshold of the photoelectric effect unit, and the sum of their energies exceeds the operating threshold, allowing for multi-point emission to prevent light interference and maintain the display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the front distance sensing module is arranged on a non-display area of the front side, then the distance sensing function is realized, but the area of the non-display area is increased and the screen-to-body ratio is reduced
Solution Approach 1:
The patent transitions the distance sensing module from a traditional placement on the non-display area (2D plane arrangement) to an arrangement below the display area, utilizing the vertical dimension and edge regions. This dimensional shift allows the sensing module to occupy spaces that do not interfere with the display area, thereby maintaining a high screen-to-body ratio while preserving distance sensing functionality.
2Area of stationary object
If the front distance sensing module is arranged below the display area, then the screen-to-body ratio is increased, but the infrared ray for sensing distance will interfere with the display effect of the screen
Solution Approach 1:
The patent divides the infrared emission function into multiple separate infrared emitters arranged in an array below the display area. Each emitter independently emits infrared rays with energy below the excitation threshold, preventing any single emitter from causing display interference while collectively providing sufficient infrared energy for accurate distance sensing.
Solution Approach 2:
The patent applies different energy levels to different infrared emitters, with each emitter's energy specifically controlled to be below the photoelectric excitation threshold of the display screen. This localized energy control ensures that infrared emission occurs in regions and at levels that do not trigger display interference, while the cumulative effect maintains sensing accuracy.
3Object-affected harmful factors
If multiple infrared emitters are used with each emitter's energy less than the excitation threshold, then light interference is prevented, but the device complexity increases
Solution Approach 1:
The patent combines multiple infrared emitters into a single integrated sensing module located below the display area. This merging approach consolidates the complexity of multiple emission sources into one unified component structure, simplifying the overall device architecture while maintaining the benefits of multi-emitter infrared emission for interference-free distance sensing.
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
This arrangement reduces the non-display area occupation, increases the screen-to-body ratio, and enables effective distance sensing without interfering with the screen display, enhancing the display ratio and sensing functionality.
Implementation Method 1
When energy received by a photoelectric effect unit of the control circuit is greater than an excitation threshold, the control circuit is turned on, and the light emitting unit emits light
Implementation Method 2
The distance sensing module is arranged below a display area of the screen module, and includes an infrared receiver and multiple infrared emitters
Data Source
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AI summary
An electronic device includes a screen module and a distance sensing module. The screen module includes a light emitting unit and a control circuit conductively connected with the light emitting unit, where when energy received by a photoelectric effect unit of the control circuit is greater than an excitation threshold of the photoelectric effect unit the control circuit is turned on and the light emitting unit emits light. The distance sensing module is arranged below a display area of the screen module and includes an infrared receiver and a plurality of infrared emitters, where emitted energy of any one of the plurality of infrared emitters is less than the excitation threshold and a sum of emitted energies of the plurality of infrared emitters is greater than an operating threshold of the distance sensing module.