Scanner Light Detection for Display Screen Reading
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Solution Overview
Problem
Conventional scanner devices struggle to accurately read the screens of modern terminal devices with large screens and self-luminous displays, such as cellular phones and tablets, due to varying light conditions and display types, which require specific reading settings that are not easily adjusted.
Innovation Solution
A scanner device with a light detecting portion, such as a CCD sensor, and a control portion that adjusts reading sensitivity based on detected light conditions, allowing for automatic switching between normal and display screen scan modes, including settings for backlight presence or absence, to optimize image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a scanner device uses fixed reading sensitivity settings, then the device structure remains simple, but it cannot accurately read display screens with varying light conditions and display types
Solution Approach 1:
The patent implements dynamic adjustment of reading sensitivity by detecting light conditions and automatically switching between normal scan mode and display screen scan mode. The control portion adjusts reading sensitivity based on detected light intensity, enabling the scanner to adapt to varying display conditions (backlight on/off, different display types) without requiring multiple fixed-configured devices.
2Measurement precision
If the scanner automatically adjusts reading sensitivity based on light detection, then reading accuracy improves, but the device requires additional light detecting portions and control mechanisms
Solution Approach 1:
The patent makes the light detecting portion serve dual functions: it detects light conditions for automatic mode switching and also contributes to the scanning process itself. By integrating the light detection capability into the existing scanner structure, the patent avoids adding completely separate detection systems, thereby reducing overall device complexity while achieving adaptive reading accuracy.
3Adaptability or versatility
If the scanner is designed for specific reading conditions, then the device structure remains simple, but it cannot handle terminal devices in power-saving modes or with different backlight settings
Solution Approach 1:
The patent implements dynamic adjustment of reading sensitivity by detecting light conditions and automatically switching between normal scan mode and display screen scan mode. The control portion adjusts reading sensitivity based on detected light intensity, enabling the scanner to adapt to varying display conditions (backlight on/off, different display types) without requiring multiple fixed-configured devices.
Solution Approach 2:
The scanner device performs self-adjustment by automatically detecting light conditions and switching between reading modes without user intervention. The control portion autonomously determines whether to use normal scan or display screen scan based on light detection results, eliminating the need for users to manually configure settings for different terminal device states.
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
Enables accurate and appropriate reading of display screens on terminal devices by automatically adjusting illumination conditions, ensuring clear capture of graphics and information regardless of backlight status, even when devices shift to power-saving modes.
Implementation Method 1
a light detecting portion (22b) detects light from an object placed on the document table (23)
Data Source
AI summary
A scanner device according to one aspect of this disclosure includes a document table, a light detecting portion, and a control portion. The light detecting portion detects light from an object placed on the document table. The control portion adjusts reading sensitivity for the object on the basis of a detection result of the light detecting portion.