Apparatus and method for forming image by detecting thermal print head type

• US 7,649,542 B2
• Filed: 07/26/2005
• Issued: 01/19/2010
• Est. Priority Date: 11/08/2004
• Status: Expired due to Fees

• Current Assignee: S-Printing Solution Co., Ltd. (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Hyun-Jun
• Primary Examiner(s): FEGGINS, KRISTAL J
• Application Number:
  US11/188,982
• Publication Number:
  US 20060098078A1
• Time in Patent Office: 1,638 Days
• Field of Search: 347/171, 347/189, 347/192, 347/194, 347/211, 347/59, 347/50, 347/19
• US Class Current: 347/171
• CPC Class Codes: B41J 2/17543 Cartridge presence detection or type identification
• CPC Class Codes: B41J 2/32 using thermal heads
• CPC Class Codes: B41J 25/34 Bodily-changeable print heads or carriages

Abstract

Provided are an apparatus and method for forming an image by determining a thermal print head type and generating driving signals for driving the thermal print head according to the thermal print head type. The apparatus includes a data input unit which receives data regarding an image to be printed, a controller which determines the thermal print head type and generates driving signals for driving the thermal print head according to the thermal print head type, and the thermal print head which prints the image by heating a medium.

Claims

1. An image forming apparatus with a thermal print head which prints an image by heating a medium, comprising:

a data input unit which receives data regarding an image to be printed;

a controller which determines the thermal print head type and generates driving signals for driving the thermal print head according to the thermal print head type; and

the thermal print head which prints the image by applying heat to the medium in response to the driving signals;

wherein the controller detects a data signal of a data line connected to the thermal print head and determines the thermal print head type based on the detected data signal.

2. The apparatus of claim 1, wherein the thermal print head is rotated to turn toward a first surface and a second surface of the medium.

3. The apparatus of claim 1, wherein the controller receives a determination signal for determining the thermal print head type from the thermal print head, and determines the terminal print head type based on the determination signal.

4. The apparatus of claim 1, wherein the controller comprises:

a memory which stores information regarding various types of thermal print heads;

a driving unit which determines the type of thermal print head, reads information regarding the thermal print head type from the memory, and generates the driving signals based on the read information; and

an output buffer which outputs the driving signals to the thermal print head under the control of the driving unit.

5. The apparatus of claim 4, wherein the information regarding the thermal print head type specifies at least one of the number of data lines of the thermal print head, the number of bits of data received via the data lines, a clock signal, a strobe signal, and an image compensation table.

6. The apparatus of claim 4, wherein the driving unit comprises:

a thermal print head determination unit which detects a signal of a predetermined one of a plurality of data lines connected to the thermal print head, and determining the thermal print head type;

a signal generator which reads the information regarding the thermal print head type from the memory, and generates the driving signals; and

a buffer controller which controls the operation of the output buffer, such that the driving signals are not output to the thermal print head when the thermal print head determination unit is determining the thermal print head type, and are output to the thermal print head after the signal generator generates the driving signals.

7. The apparatus of claim 6, wherein the predetermined data line is not available to at least one of the various types of thermal print heads.

8. The apparatus of claim 6, wherein the thermal print head determination unit detects a signal of a predetermined one of the plurality of data lines connected to the thermal print head by pulling up the predetermined data line, and, using the detected signal, determines the thermal print head type by checking whether the thermal print head uses the predetermined data line.

9. An apparatus for determining the type of a thermal print head that prints an image by heating a medium, comprising:

a memory which stores information regarding various types of thermal print heads;

a driving unit which determines the thermal print head type, reads information regarding the thermal print head type from the memory, and generates the driving signals for driving the thermal print head based on the information regarding the thermal print head type; and

an output buffer which outputs the driving signals to the thermal print head under the control of the driving unit;

wherein the driving unit receives a determination data signal which determines the thermal print head type from the thermal print head, and determines the thermal print head type.

10. The apparatus of claim 9, wherein the driving unit comprises:

a thermal print head determination unit which detects a signal of a predetermined one of a plurality of data lines connected to the thermal print head, and determines the thermal print head type using the signal;

a signal generator which reads the information regarding the thermal print head type from the memory, and generates the driving signals for driving the thermal print head based on the information regarding the thermal print head type; and

a buffer controller which controls the operation of the output buffer, such that the driving signals are not output to the thermal print head when the thermal print head determination unit is determining the thermal print head type, and are output to thermal print head after the signal generator generates the driving signals.

11. A method of forming an image using a thermal print head which prints the image by heating a medium, comprising the steps of:

determining a type of the thermal print head;

receiving data regarding the image to be printed;

generating driving signals which drive the thermal print head, according to the thermal print head type; and

driving the thermal print head to print the image by heating the medium, in response to the driving signals;

wherein the step of determining the type of the thermal print head comprises the steps of

detecting a data signal of a predetermined one of a plurality of data lines of the thermal print head; and

determining the thermal print head type using the detected data signal.

12. The method of claim 11, wherein the thermal print head is rotated to turn toward a first surface and a second surface of the medium.

13. The method of claim 11, wherein the step of determining the type of the thermal print head comprises the steps of:

receiving a determination signal, which is used to determine the thermal print head type, from the thermal print head; and

determining the thermal print head type.

14. The method of claim 11, wherein the predetermined data line is not available to at least one of a plurality of thermal print heads whose types are to be determined.

15. The method of claim 11, wherein the step of detecting the signal of the predetermined data line comprises the steps of detecting the signal of the predetermined data line by pulling up the predetermined data line.

16. The method of claim 11, further comprising the step of controlling the driving signals not to be input to the thermal print head while determining the thermal print head type.

17. The method of claim 11, wherein the step of generating the driving signals comprises the steps of:

reading information regarding the thermal print head type from a memory which stores information regarding various types of thermal print heads; and

generating the driving signals for driving the thermal print head based on the information regarding the thermal print head type.

18. The method of claim 17, wherein the information regarding the thermal print head type specifies at least one of the number of data lines of the thermal print head, the number of bits of data received via a data line, a clock signal, a strobe signal, and an image compensation table.

19. A computer readable recording medium storing a program executed by a computer comprising the steps of:

determining a type of the thermal print head;

receiving data regarding the image to be printed;

generating driving signals which drive the thermal print head based on the thermal print head type; and

driving the thermal print head to print the image by heating the medium, in response to the driving signals;

wherein the step of determining the type of thermal print head comprises the steps of;

detecting a data signal of a predetermined one of a plurality of data lines of the thermal print head; and

determining the thermal print head type using the detected data signal.