JPS63139943U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a multi-gradation thermal recording device according to this invention, FIG. 2 is a block diagram showing an embodiment of a multi-gradation thermal recording device according to this invention, and FIG. 2 is a detailed explanatory diagram of the part, FIG. 4 is a configuration diagram of the recording pixel used in this embodiment, FIG. 5 is a timing chart showing the timing of writing operation of recording density information to the line memory, and FIG. 6 is a diagram of the embodiment. FIG. 7 is an explanatory diagram showing an example of information pixels processed by the first heat storage calculation unit in the embodiment, and FIG.
FIG. 8 is a graph explanatory diagram showing the basic operation process of the printing energy calculation section in the embodiment, FIG. 9 is a graph explanatory diagram showing the operation process of the printing energy calculation section based on information from the first heat storage calculation section, and FIG. FIG. 10 is a graph explanatory diagram showing the operation process of the printing energy calculation section based on the information from the second heat storage calculation section. Explanation of symbols, 1...Thermal head, 1a...
Heating element, 2... Gradation control means, 3... Head driving means, 4... Pattern determining means, 5... Energy determining means, 6... Heat storage correction means.

Claims (1)

[Scope of utility model registration request] A thermal head in which a large number of heating elements are arranged according to the recording dot density, and a gradation control means that configures each pixel with a plurality of dot matrices and determines the density expression format of each pixel in accordance with input density information. and head driving means for driving each heating element of the thermal head according to control information from the gradation control means, the gradation control means controlling input density information. pattern determining means for determining the recording dot pattern in each pixel according to the input density information; energy determining means for determining the printing energy for the dots in each pixel in advance according to the input density information; 1. A multi-gradation thermal recording apparatus comprising: a heat storage correction means for correcting the printing energy determined by the energy determination means based on the degree of heat storage of the lever.