JPS59190872A - Thermal recording head - Google Patents

Abstract

PURPOSE:To attain high-speed recording without the need to supplement lines removed on the reading side by a method in which plural rows of heating resistor recording elements, having different resolutions, are provided on a base plate and a thermal recording head for a thermal facsimile is formed. CONSTITUTION:In recording of high-resolution mode in a facsimile, recording is made only by recording element row on the high-resolution side, made up of the recording elements 10 among plural rows of recording elements. In the case of high-speed mode, recording is made only by the recording element row made up of recording elements 11 or 12 on the low-resolution side. In case where the speed in the sub-scanning direction on the reading-out side is doubled and lines are removed alternately to roughen the resolution, recording is made by the recording element row on the low-resolution side, and thereby recording can be attained in the same time period as on the reading-out side and the recording can be accelerated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal recording head in a thermal facsimile machine, in which a plurality of rows of heating resistor recording element arrays with mutually different resolutions are formed on the same substrate, thereby increasing the speed of the thermal facsimile machine. It makes it seem possible.

Conventionally, as a thermal recording head, one shown in FIG. 1 is known. In the figure, 1 is a ceramic substrate;
A heating resistor recording element array 2 is formed on the substrate, and an IC 3 for driving the recording element array and a matrix wiring 4 for connecting the IC and the recording element array 2 are provided.

As shown in FIG. 2, a thermal recording paper 6 is pressed onto the recording element array 2 of such a thermal recording head by a pressure rubber roller 5 to perform recording.

Incidentally, the reference numeral 7 in FIG. 2 indicates a protective mold for the IC 3 provided on the substrate 1. Further, the recording element array 2 described above is constituted by recording elements shown enlarged by reference numeral 8 in FIG.

By the way, facsimiles are becoming faster and with higher resolution, and recently a recording speed of 1 m (5) per line has become essential. To achieve this, for example 1
Along with the high resolution mode of 6 dots/ho (main scan) x 16 dots/xi (sub scan), 16 dots/1 II (main scan) x
Some are provided with a low-resolution high-speed mode of 8 dots/*m (sub-scanning) or 8 dots/*m (main-scanning)×8 dots/*m (sub-scanning). That is, on the reading side, for example, by doubling the reading speed and reading by thinning out lines one by one compared to the high-resolution mode, the reading time can be halved, reducing the amount of information and making reading and transmission faster. It was becoming familiar.

On the recording side, on the other hand, data was recorded in a thinned-out state to increase speed.

1- If you thin out the dots and widen the distance between the dots and record as described above, there will be a significant deterioration in image quality, such as white areas between the dots, so in reality, the lines extracted on the reading side and Recording was performed while interpolating information between lines to prevent image quality from deteriorating. Therefore, even if data is read by thinning as described above, if the above-mentioned interpolation is performed during recording, the reading speed will not be increased.

The present invention eliminates the above-mentioned conventional drawbacks and provides a thermal recording head for facsimile machines that can perform high-speed recording without deteriorating image quality in high-speed mode. The present invention is characterized in that a heating resistor recording element array is formed.

An embodiment of the present invention will be described below with reference to the drawings. 6th
In the figures and FIG. 4, the same reference numerals as in FIG. 1 or 2 indicate the same or corresponding parts. Reference numeral 9 indicates a heat generating resistor recording element array formed on the substrate 1, which is enlarged by recording elements 1[ ], 11 or recording elements 10. ) consists of a heating resistor recording element array. The recording elements 10 are arranged so that the resolution in the main scanning direction is the highest resolution required for this facsimile machine, for example, 16 dots/print.
The dots are arranged so as to be 1/2 of the case of , that is, 8 dots/field. The length of 11 with respect to recording element 10 in the sub-scanning direction is set to double, and this is determined in various ways depending on the sub-scanning speed and the designed value of the degree of overlapping of recording dots.

With the thermal head configured as above, facsimile 1
When recording in high-resolution mode 1, recording is performed only by the high-resolution side of the plurality of recording element rows 9 made up of recording elements 10, and in the high-speed mode, recording is performed using only the high-resolution side of the recording element rows 9. Recording is performed only by a recording element array composed of recording elements 11 or 12. In this way, when the speed in the sub-scanning direction is doubled on the reading side and the resolution is made coarser by thinning out each line, on the recording side, the information corresponding to the thinning between lines can be saved. Recording while interpolating I2 takes time for the interpolated line, but by recording using the recording element array on the lower resolution side, recording can be performed in the same time as on the reading side, and the recording is accelerated.

In the embodiment described above, a plurality of rows of recording elements constituting the heating resistor recording element array 9 are provided close to each other on the substrate 1, and during recording, the thermal recording paper 6 is applied to these recording element rows by the same rubber roller 5. However, it is also possible to provide a plurality of rows of recording elements at separate positions on the substrate, and to press the heat-sensitive recording paper to each of these recording element rows using a separate rubber roller. . Further, in the above embodiment, the heating resistor recording element 9 was provided near one edge of the substrate 1, but this recording element 9 was provided at the center of the substrate 1, and the recording element 9 was provided near both edges of the substrate 1. C3 may also be provided.

This invention is as described above, and it happens that the same substrate-F has a resolution of 9
A plurality of different heating resistor recording element rows are provided, and the recording element rows are used differently for recording in high resolution mode and low resolution high speed mode. With a wide recording element,
Lines extracted on the reading side can be recorded at high speed without interpolation, and high-quality images with no blank spaces can be obtained.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a conventional thermal recording head, and Figure 2 is a diagram of a conventional thermal recording head.
3 is a configuration diagram of a thermal recording head showing an embodiment of the present invention; FIG. 4 is a front view of a recording apparatus using the recording head shown in FIG.
This figure is a front view of a printing apparatus using the printing head of FIG. 6. 1: Substrate, 3: IC59; Heating resistor recording element array, 10
, 11, 12: recording element. Agent Masuo Oiwa Figure 1 ■ Figure 3 2. 5

Claims (1)

[Claims] 1. A thermal recording head for use in a thermal facsimile in which a heat generating resistor recording element array is formed on a substrate, characterized in that a plurality of heat generating resistor recording element arrays having mutually different resolutions are formed on one of the substrates.