Light Attenuator Page Detection Reduces Sensor Count
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Solution Overview
Problem
Existing page detection technologies for electronic books require a large number of light sensors, leading to high manufacturing costs.
Innovation Solution
A system and method using light attenuators to detect the opened page in a book, where at most M light attenuators are installed in each page detection area, allowing an external light source to pass through and be attenuated, with M light sensing devices detecting the attenuated intensity to determine the page based on intensity ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical masking decision uses a large number of light sensors to achieve accurate page detection, then page detection accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple light attenuators with a single light sensor to achieve page detection. Instead of using one light sensor per page (which would require many sensors), the invention merges the functions of multiple sensors into a single sensor by using light attenuators to create different light intensity levels that correspond to different pages. This reduces the total number of light sensing devices needed while maintaining detection accuracy.
Solution Approach 2:
The patent changes the parameter of light intensity by using light attenuators with different attenuation levels. By controlling the amount of light attenuation, the system creates distinct intensity patterns that encode page information. This allows a single light sensor to detect different pages by measuring different intensity levels, eliminating the need for multiple sensors.
2Adaptability or versatility
If optical masking decision uses a large number of light sensors to detect each page, then page detection capability is improved, but device complexity increases
Solution Approach 1:
The patent merges the detection functions of multiple pages into a single light sensor by using light attenuators. Instead of having separate sensors for each page, the system uses one sensor that detects combined light signals with different attenuation levels, thereby reducing device complexity while maintaining the ability to detect multiple pages.
Solution Approach 2:
The patent introduces light attenuators as intermediary elements between the light source and the light sensor. These attenuators modify the light signals to encode page information, allowing a single sensor to interpret different page states through varying attenuation levels rather than requiring separate sensors for each page.
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 approach significantly reduces the number of light sensing devices needed, lowering manufacturing costs while effectively detecting the opened page using a controller to interpret the intensity ratios.
Implementation Method 1
allowing an external light source to pass through the at most M light attenuators thereby attenuating an intensity of the external light source
Data Source
AI summary
A system for page detection using light attenuators is applied in a book to detect an opened page of the book. The book has N pages and each page has a page detection area in which at most M light attenuators are installed in each page detection area. A light source passes through the at most M light attenuators for attenuating intensity of the light source. M light sensing devices are installed in an area of the book that corresponds to the page detection area. The M light sensing devices are used to detect attenuated intensities of the light source. A controller is connected to the M light sensing devices for detecting the opened page based on a ratio of the intensities of the light source detected by the M light sensing devices on each page.