Image Sensor Transparent Member Anti-Ghosting Design
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Solution Overview
Problem
In image sensors, the short distance between the sensor chip's end surface and pixel array unit leads to ghosting issues due to reflected light, which existing technologies fail to adequately prevent.
Innovation Solution
An image sensor design where a plate-like transparent member larger than the sensor chip is affixed to the pixel array unit, ensuring that reflected light is directed away from the pixel array, preventing ghosting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the distance between the end surface of the sensor chip and the pixel array unit is shortened due to miniaturization, then the device size is reduced, but reflected light from the transparent member enters the pixel array unit causing ghosting
Solution Approach 1:
The patent extracts the harmful reflected light path from the system by extending the transparent member beyond the sensor chip boundaries. This creates a physical separation where reflected light is directed away from the pixel array unit, effectively removing the ghosting problem while maintaining the miniaturized device structure.
Solution Approach 2:
The extended transparent member acts as an intermediary element that intercepts and redirects reflected light before it can enter the pixel array unit. By positioning the transparent member to extend beyond the sensor chip, it serves as a mediating structure that controls light paths and prevents harmful reflections from reaching the sensitive pixels.
2Object-affected harmful factors
If a transparent member is made larger than the sensor chip to prevent ghosting, then ghosting is prevented, but the device complexity increases
Solution Approach 1:
The transparent member serves multiple functions: it protects the sensor chip, transmits incident light to the pixels, and when extended beyond the chip boundaries, it also prevents ghosting by redirecting reflected light. This multi-functionality allows a single structural modification to address multiple requirements without adding separate components.
Solution Approach 2:
The patent merges the protective function and the anti-ghosting function into a single transparent member structure. By extending the same transparent member that already serves as a protective cover also serves as a light management element that prevents reflections from entering the pixel array, combining multiple functions without increasing device complexity.
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
Effectively prevents ghosting in captured images by ensuring reflected light does not enter the pixel array unit, maintaining image quality while maintaining mechanical rigidity and focusing accuracy.
Implementation Method 1
reflected light reflected by the end surface of the transparent member
Implementation Method 2
pixels that perform photoelectric conversion
Data Source
AI summary
The present technology relates to an image sensor, a manufacturing method and an electronic device capable of preventing a ghost. In the image sensor, a plate-like transparent member larger than a sensor chip in size is affixed to a side of a pixel array unit of the sensor chip having the pixel array unit in which pixels that perform photoelectric conversion are arrayed. The present technology can be applied to a case of capturing an image by receiving light, regardless of whether the light is visible light or not.