Thermal Image Erasing with Lamp Preheating and Temperature Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for erasing images from thermally reversible recording media are inefficient due to the time required for lamp stabilization and uneven heating, leading to inconsistent and slow image removal.
Innovation Solution
An image processing apparatus with a halogen lamp and adjustable optical output, combined with a controller unit that controls temperature to fall within a prescribed range, ensuring stable and rapid image erasure by relative movement of the lamp and medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a flash lamp is used to heat the thermally reversible recording medium, then the medium can be heated without contact, but the heating speed is insufficient due to waiting time for light emission stabilization and diffused light
Solution Approach 1:
The lamp is preheated before actual image erasure begins. The controller activates the lamp in advance to allow it to reach stable light emission conditions, thereby eliminating the stabilization waiting time during the actual erasing operation. This preliminary action ensures that when erasure starts, the lamp is already at optimal operating temperature and emission stability.
Solution Approach 2:
The system dynamically adjusts the lamp heating process based on operational phase. During the preliminary phase, the lamp is heated to stabilization temperature. During the actual erasure phase, the lamp maintains this stabilized state. This dynamic control of the heating process allows the system to optimize both the stabilization time and the subsequent erasing speed.
2Productivity
If high-power light is used to erase the image quickly, then the erasing speed improves, but the temperature control becomes difficult leading to incomplete erasure or medium damage
Solution Approach 1:
The controller monitors the lamp's operating state and adjusts the heating process accordingly. By detecting whether the lamp has reached stable light emission conditions, the controller determines the appropriate timing to begin erasure and manages the heating duration. This feedback mechanism ensures that the medium receives consistent thermal energy without overheating, maintaining reliable temperature control throughout the erasure process.
Solution Approach 2:
The system changes the operational parameters of the lamp based on the erasure phase. During preliminary heating, the lamp operates at high power to reach stabilization temperature. During actual erasure, the parameters are adjusted to maintain stable light emission conditions. This parameter change strategy allows the system to achieve both rapid erasure and stable temperature control.
3Productivity
If the lamp heating process is not optimized, then the device structure remains simple, but the image erasure is slow and unstable
Solution Approach 1:
The lamp serves its dual function of both heating and light emission. By utilizing the lamp's own thermal energy and light output without requiring separate heating elements or complex multi-component systems, the invention achieves efficient image erasure while maintaining relatively simple device structure. The lamp essentially serves itself to perform both heating and erasing functions.
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
The apparatus enables speedy and stable image erasure by controlling thermal energy to achieve a desired temperature range, preventing incomplete erasure and medium damage.
Implementation Method 1
the thermally reversible recording medium is irradiated with high-power light such as a laser beam and the medium absorbs the light and convert the light into heat
Implementation Method 2
a thermally reversible recording medium whose transparency or color tone changes reversibly depending on temperature
Data Source
Figure 1A~1B
Figure 2A~2C
Figure 3A~3B
AI summary
An image processing apparatus (10, 20) includes a lamp (111) with an adjustable optical output, the lamp (111) configured to emit light, and an image eraser (12a) configured to heat an entire surface of a thermally reversible recording medium (30) by relative movement of the lamp (111) and the thermally reversible recording medium (30) whose transparency or color tone changes reversibly depending on temperature, to erase an image recorded on the thermally reversible recording medium (30). In the image processing apparatus (10, 20), wherein the image eraser (12a) controls a temperature to be reached by the thermally reversible recording medium (30) to fall within a prescribed range in an erasing area of the thermally reversible recording medium (30).