KR940002975B1 - Thermal recording control method for fax - Google Patents

Abstract

The method employs a data input unit which receives a line of data from a scanner and a modem, a black pixel counter, a clock generator, a latch unit which latches a line of data and a thermal printer head which selects the 1~4 block and write according to the number of black pixels.

Description

Facsimile recording control method

1 is a block diagram of a conventional facsimile recording control device.

2a to f are operational waveform diagrams according to FIG.

3 is a block diagram of a facsimile recording control device of the present invention.

4a to f are operational waveform diagrams according to FIG.

5 is a signal flow diagram showing a thermal recording control method according to the present invention.

6 is a signal flow diagram showing a subroutine (a) according to FIG.

* Explanation of symbols for main parts of the drawings

1: reading unit 2: modem

3: data input part 4: black pixel counter part

5: Clock generator 6: Latch

7: thermal print head

The present invention relates to a facsimile receiver control device, and more particularly, to maximize the performance of a thermal print head (TPH) with a given power supply capacity, thereby avoiding a constant driving method of the thermal print head (TPH) by block. The present invention relates to a facsimile recording control method which is suitable for improving the recording quality and increasing the recording speed by recording the maximum number of pixels that can be simultaneously written by constituting blocks variably.

In the conventional facsimile write control method, as shown in FIG. 1, the line memory unit 11 synchronizes the serial data SDin with the clock signal CK of the clock signal generator 12 as shown in FIG. 2b is input to the thermal print head 14 by the latch signal lA of the latch unit 13, and then to the enable signal that is the first to fourth blocks BL ₁ to BL ₄ as shown in 2c to f. Therefore, four blocks (or eight blocks) are operated in order to record.

However, such a conventional recording and recording control apparatus and method always drives four or eight blocks of a given block in sequence so that three portions of discontinuity are generated when one line is recorded, so that there is a gap between lines. Even if there is a problem and the number of black pixels in one line of data is small, when one line can be recorded simultaneously at a given power capacity, the recording speed is reduced by dividing into four blocks.

If one line is always recorded at a time, there is a problem in that the cost increases due to the increase in power capacity because a large capacity power is required when recording many lines.

In order to solve such a conventional problem, the present invention records one line at a time when recording a small line with a given power capacity, and divides the data into several blocks when recording a line with many black pixels. Invented a recording control method that can improve and improve the recording speed, which will be described with reference to the accompanying drawings.

FIG. 3 is a block diagram of the thermal recording control device according to the present invention. As shown therein, a data input unit 3 which receives one line of information from a reading unit 1 or a modem 2, and one line of a line. A black pixel counter unit 4 for counting the number of black pixels with respect to the picture information, a clock generator 5 for synchronizing when the black pixel counter unit 4 receives data for one line, and a line for one line And a latch portion 6 for latching the configured picture information, and a thermal print head 7 for selecting and writing the first to fourth blocks BL ₁ to BL ₄ according to the number of latched black pixels.

The operation and effects of the present invention configured as described above will be described with reference to the waveform diagrams shown in FIGS. 4A to 4F and the signal flow diagrams of FIGS. 15 and 6.

First, as shown in the block diagram of FIG. 3, when the fax is a reception, the output of the data input unit 3 receiving the call information from the modem 2 and the copy information from the reading unit 1 when the copy is received is The number of black pixels for one line information is counted by the black pixel counter 4 in synchronization with the clock signal CK of the clock generator 5 having the waveform shown in FIG. 4A.

The data for one line configured as described above is input to the thermal print head 7 by the latch signal LA of the latch portion 6, which is the waveform shown in FIG. 4A, and is input by the latch signal LA. The one-line data is recorded in one pattern of the first to fourth blocks BL ₁ to BL ₄ , which are various cases, as shown in FIGS. 4C to F.

Here, the first block BL ₁ is a case of simultaneously driving and recording _{one line as} shown in FIG. 4c, and the second blocks BL ₂₁ and BL ₂₂ store two lines of speech information as two blocks as shown in FIG. 4d. In this case, the third blocks BL ₃₁ and BL ₃₃ sequentially record the information of one line into three blocks as shown in FIG. 4E, and sequentially record the fourth blocks BL ₄₁ and BL _42. (BL ₄₃ , BL ₄₄ ) are composed of four blocks as shown in FIG. 4f and recorded sequentially.

That is, since recording is performed while the motor is continuously driven, the recording quality and the recording speed are improved.

Therefore, referring to the signal flow chart of FIG. 5, the power supply capacity (Q = NK) and the power consumption per thermal printhead heating element (K) are input, and when the operating state is the transmission mode, the original reading and the data are read. It works as a normal routine for compression and data transfer.

In the case of reception, the compressed data is input through the modem 2 to demodulate the reception data to count (n) the black pixels for the video information, and calculate the power (P = Kn) required for simultaneous recording of one line. do.

At this time, as shown in the subroutine (a) of FIG. 6, when the power capacity (Q = NK) is larger than the power required for simultaneous recording of one line (P = Kn) (Q ≥ P), one line is one block. In the case of recording Q <P, the power consumption P is divided by the power supply capacity Q to calculate n = NC + α to determine the number of blocks (where the second to fourth blocks are determined by the recording pattern). ).

If the reception ends, the operation ends. Otherwise, it goes down to the next line and repeats the above loop.

In the case of copy mode, black pixels are counted when reading the original, and one line is read, and power consumption (P = Kn) is calculated according to the number of black pixels, and recording is performed via the same subroutine a as receiving. All.

As described in detail above, the present invention utilizes the capacity of a given power supply to maximally change the recording pattern to improve the maximum recording speed and image quality according to a given power supply capacity. By knowing the power supply capacity and the power consumption per thermal element of the thermal printhead without going through, it is possible to obtain the optimum recording speed and recording quality in a given system.

Claims (1)

The data input unit 3 which receives the video information from the reading unit 1 and the modem 2 and the black pixel for the inputted video information are synchronized with the clock signal of the clock generator 5 to n. The black pixel counter unit 4 and the latch unit 6 latching the black pixel counted data information give a given power supply capacity Q = NK according to the latched black pixel number n and the heat generation of the recording apparatus. and by using a consumption per device power (K) to calculate the power (P = Kn) required for Halla the simultaneous write and compare the power supply capacity (Q) of one of the blocks (BL ₁ ~ BL ₄₎ selecting for each line A facsimile recording control method characterized by recording through a thermal print head (7).