Laser Recording Medium Layered Structure for Full-Color Printing

The patent divides the color developing process into distinct temperature zones with separate color developing layers. Each layer is optimized for specific temperature ranges, allowing selective development without requiring prolonged heat transfer to lower temperature layers. This segmentation enables faster overall processing while maintaining complete color development.

The patent changes the temperature parameter distribution across multiple color developing layers with different threshold temperatures. By arranging layers with progressively lower activation temperatures and using intermediate heat insulating layers, the system achieves rapid selective development at different temperature levels, reducing total printing time while ensuring complete color development.

The patent makes a single laser source perform multiple functions by using it to excite different color developing layers with different activation temperatures. Instead of requiring three separate lasers for three colors, one laser source can selectively develop cyan, magenta, and yellow layers by controlling thermal energy distribution, thereby reducing device size and cost while maintaining full-color recording capability.

The patent uses parameter changes in temperature thresholds across different color developing layers to enable a single laser wavelength to achieve full-color recording. By varying the activation temperatures of color developing materials rather than using different laser wavelengths, the system simplifies the laser subsystem while maintaining the ability to record all three primary colors.

The patent applies local quality by creating distinct thermal zones within the recording medium structure. Intermediate heat insulating layers are strategically placed between color developing layers with different activation temperatures, creating localized thermal environments. This allows a single laser source to selectively heat specific layers based on their thermal properties and activation thresholds, making selective color development controllable despite using one wavelength.

The patent introduces intermediate heat insulating layers as mediators between the laser energy source and different color developing layers. These intermediate layers control the distribution and penetration depth of thermal energy, enabling selective activation of specific color layers by adjusting laser irradiation parameters. This intermediary structure makes selective color development controllable using a single laser wavelength.