Light Irradiation Device Density Adjustment Toner Paper
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Solution Overview
Problem
Adjusting the light amount in a light irradiation device is challenging when using paper with a monochromatic image formed in ink, as density unevenness occurs when the ink is irradiated with laser light, making it difficult to accurately adjust the light amount based on the density change of the dried ink.
Innovation Solution
A light irradiation device that includes an irradiation portion for irradiating a member with varying density due to light or heat, and an adjustment portion that adjusts the light amount based on the density change of the member, using a light or heat-sensitive material like thermosensitive paper, photosensitive paper, or toner-coated paper to accurately control the light amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ink-coated paper is used for light amount adjustment, then the adjustment can be performed using a simple structure without specialized devices, but density unevenness occurs when the ink is irradiated with laser light making it difficult to accurately adjust the light amount
Solution Approach 1:
The patent changes the material parameter from ink-coated paper to toner-coated paper or light/heat-sensitive paper. Toner is a powder material that does not exhibit the same drying shrinkage and density unevenness as liquid ink when irradiated with laser light. This parameter change in the coating material eliminates the density unevenness problem while maintaining the simplicity of the adjustment method.
Solution Approach 2:
The patent uses toner-coated paper or light/heat-sensitive paper as a disposable test sheet for light amount adjustment. These sheets are inexpensive and can be used once to calibrate the light amount, then discarded. This approach avoids the need for expensive specialized measurement devices while achieving accurate adjustment without the density unevenness problem associated with ink-coated paper.
2Duration of action of stationary object
If ink is irradiated with laser light for drying, then the ink dries to form an image, but density unevenness occurs making it difficult to use for accurate light amount adjustment
Solution Approach 1:
The patent changes the physical state parameter of the coating material from liquid (ink) to solid powder (toner) or light/heat-sensitive material. Toner particles do not undergo the same evaporation and drying shrinkage processes as liquid ink, thereby eliminating density unevenness during the drying process. This allows the test sheet to maintain uniform density for accurate light amount measurement and adjustment.
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 solution allows for precise adjustment of the light amount, reducing density unevenness and improving accuracy compared to using ink-coated paper, while also being cost-effective and not requiring specialized external devices.
Implementation Method 1
a member having density varying in accordance with at least one of light or heat
Implementation Method 2
a member having density varying in accordance with at least one of light or heat
Implementation Method 3
an adjustment portion that adjusts a light amount of the irradiation portion based on a change of the density in the member irradiated with the light by the irradiation portion
Data Source
AI summary
A light irradiation device includes: an irradiation portion that irradiates a member with light, the member having density varying in accordance with at least one of light or heat; and an adjustment portion that adjusts a light amount of the irradiation portion based on a change of the density in the member irradiated with the light by the irradiation portion.