KR0184477B1 - Heat transfer type image processing apparatus - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

The present invention relates to a thermal transfer image forming apparatus capable of forming an image on a recording sheet by using a light source of a xenon lamp.

I. The technical problem that the invention is trying to solve

SUMMARY OF THE INVENTION The present invention provides a thermal transfer image forming apparatus capable of improving printer resolution up to 600 dpi (dot per inch) to 1200 dpi.

All. Summary of Solution of the Invention

The present invention provides a cassette on which recording paper is mounted, a first feeding roller and a second feeding roller for conveying the recording paper, and a first driving part and a second driving part for moving a film which is a medium for forming an image on the recording paper. And a pressure roller for pressing the recording paper and the film at a constant pressure, a first sensor for sensing the tip of the recording paper to operate the pressure roller, the first driving part and the second driving part, and converting the light source into a heat source. An image forming apparatus comprising a heat / dot-generating portion for forming an image on the recording paper, and a second sensor for sensing the rear end of the recording paper to stop the pressing roller, the first driving portion, and the second driving portion.

la. Important uses of the invention

Thermal transfer image forming apparatus.

Description

Thermal transfer image forming apparatus.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to thermal transfer image forming apparatuses such as printers, plain paper facsimile machines, and multifunction devices. It relates to a forming apparatus.

1 is a schematic view showing the configuration of an image forming apparatus using a heat source of a thermal print head (TPH) as shown in FIG. 1, wherein the image forming apparatus can be equipped with a plurality of recording sheets 102. The cassette 100 is installed on one side. At the upper end of one side of the cassette 100, a half moon-shaped pickup roller 104 for feeding the recording paper 102 is installed.

On one side of the pickup roller 104, a guide portion 106 for guiding the recording paper 102 to be fed to the feed roller 108 is inclined downward. On one side of the guide portion 106, a feed roller 108 for transferring the recording paper 102 fed by the pickup roller 104 to the thermal transfer head 118 is provided to be engaged with each other.

On one side of the feed roller 108, a feed sensor for inputting an image signal to the thermal transfer head 118 when the tip of the recording paper 102 reaches the thermal transfer head 118. 110 is installed.

One side of the feed sensor 110 is provided with a first driving unit 112 and a second driving unit 114 for driving the film 116, a medium for forming an image on the recording paper 102. In this case, the film 116 is attached to the first driving unit 112, and the film 116 having an image formed on the recording paper 102 is wound on the second driving unit 114.

A thermal transfer head 118 is provided between the first driving unit 112 and the second driving unit 114 to generate high temperature heat to form an image on the recording paper 102. At the upper end of the thermal transfer head 118, a roller 122 is disposed in contact with the thermal transfer head 118 to transfer the recording paper 102. The lower surface of the thermal transfer-head 102 is provided with a spring 120 for pressing the film 116 and the recording paper 102 in close contact with a predetermined pressure.

In this case, the configuration of the thermal transfer head 118 will be described in more detail with reference to FIG. 2 as follows.

The thermal transfer head 118 includes a heat sink 130 for heat dissipation, a substrate 128 in which connectors 124 and heat generating elements 126 for energy application and image data transmission are arranged in a row. The shape of the heat generating element 126 is rectangular as shown enlarged on the right side of FIG. 2.

Each of the heat generating elements 126 generates heat by the applied energy, and as the thermal transfer head 118 moves, the images are reproduced on the recording paper 102 line by line. have.

The operation state of the thermal transfer type image forming apparatus configured as described above is as follows.

When a printing signal is applied, the pickup roller 104 rotates counterclockwise to feed the recording paper 102 mounted on the cassette 100 to the feed roller 108. At this time, the pickup roller 104, the feed roller 108 and the feed sensor 110 is operated at the same time. Thereafter, the recording paper 102 moves along the guide portion 106 and is conveyed to the thermal transfer-head 118 side by the transfer roller 108.

Thereafter, the feed sensor 110 detects when the tip of the recording paper 102 reaches the thermal transfer head 118 and inputs an image signal to the thermal transfer head 118. At the same time, the first driving unit 112 and the second driving unit 114 rotate the clockwise direction to move the film 116 in the right direction (on the first diagram).

Thereafter, the recording paper 102 and the film 116 are brought into close contact with each other at a constant pressure, and the image is moved by the thermal transfer-head 118 while moving in the right direction by rotation of the roller 122 in a counterclockwise direction. Is formed.

Since the thermal transfer type image forming apparatus configured as described above uses a thermal transfer head 118 for dissipating heat to form an image on the recording paper 102, the resolution of the image formed on the recording paper 102 is increased. Is determined according to the thermal transfer-head 118. Thus, the thermal transfer-head 118 that is in practical use today is on the order of 200 dpi (dot per inch) or 300 dpi (dot per inch).

Due to this, the conventional thermal transfer method has a low print resolution formed on the recording paper 102, and the printing speed of the image forming apparatus depends on the driving of the step motor according to the amount of image data. The printing speed is significantly reduced because the speed is controlled, and if the amount of data input to the thermal transfer head 118 is large, it takes a considerable time to form an image on the recording paper 102. There was this.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a thermal transfer image forming apparatus capable of improving printer resolution up to 600 dpi (dot per inch) to 1200 dpi.

It is another object of the present invention to provide a thermal transfer image forming apparatus capable of forming an image on recording paper using a xenon lamp without using a thermal transfer head.

Still another object of the present invention is to provide a thermal transfer image forming apparatus capable of improving a printing speed due to the high speed of thermal transfer.

In order to achieve the above object, the image forming apparatus of the present invention is characterized in that an image can be formed on a recording paper by using a light source of a xenon lamp.

In order to achieve the above object, the image forming apparatus of the present invention includes a cassette on which recording paper is mounted, a first feed roller and a second feed roller for transferring the recording paper, and a medium for forming an image on the recording paper. A first roller and a second driver for moving the in-film, a press roller for pressing the recording paper and the film at a constant pressure, and a press roller, the first driver and the second driver to detect the tip of the recording paper. A first sensor, a heat / dot-generating unit for converting a light source into a heat source to form an image on the recording paper, and detecting the rear end of the recording paper to stop the pressing roller, the first driving unit, and the second driving unit. It characterized in that it comprises a second sensor to.

In order to achieve the above object, the present invention provides a device for separating ink from a medium which is a medium for forming an image on a recording sheet, the heat / dot-generating unit being a device for separating ink from the film. And a printing unit for converting the light source into a heat source to form an image on the recording paper, and a detection unit for sensing the light source and controlling the next line to be continuously printed on the recording paper.

1 is a schematic view showing the configuration of an image forming apparatus using a heat source of a thermal print head (TPH) in the prior art.

Figure 2 is a perspective view showing the configuration of the thermal transfer head in the prior art.

3 is a schematic diagram showing a configuration of an image forming apparatus using a light source of a xenon lamp according to an embodiment of the present invention.

4 is a schematic view showing the configuration of a heat / dot generator using a xenon lamp according to an embodiment of the present invention.

Fig. 5 is a detailed view showing a state of printing on recording paper by the heat / dot generating apparatus according to the embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10: cassette 12: recording paper

20: first sensor 22: control unit

24: first driving unit 26: second driving unit

28 film 30 press roller

32: second sensor 38: third sensor

44: heat / dot-generating part 46: the first mirror

48: first lens 50: second lens

52: second mirror 54: third mirror

56: reflector 58: xenon-lamp

60: condenser lens 62: stopper

64: shutter portion 66: chromatic lens

68: aperture 70: cylindrical lens

72: reflection mirror 74: detection lens

76: slit 78: photo-diode

80a, 80b: heat source 82: dot

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components, even if displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

3 is a schematic diagram illustrating a configuration of an image forming apparatus using a light source of a xenon lamp according to an embodiment of the present invention. 4 is a schematic view showing the configuration of a heat / dot generator using a xenon lamp according to an embodiment of the present invention. Fig. 5 is a detailed view showing a state of printing on recording paper by the heat / dot generating apparatus according to the embodiment of the present invention.

As shown in Fig. 3, the image forming apparatus is provided with a cassette 10 capable of mounting a plurality of recording sheets 12 on one side. At the upper end of one side of the cassette 10, a half moon-shaped pickup roller 14 for feeding the recording paper 12 is installed. On one side of the pickup roller 14, the first guide portion 16 for guiding the recording paper 12 to be fed to the first conveying roller 18 is inclined downward.

On one side of the guide portion 16, the first feed roller 18 for feeding the recording paper 12 fed by the pickup roller 14 to the first sensor 20 side is installed to be engaged with each other. One side of the first feed roller 18 detects the tip of the recording paper 12 to operate the pressure roller 30, the first driving unit 24 and the second driving unit 26. Is installed in the downward direction.

One side of the first sensor 20 is provided with a first driver 24 and a second driver 26 for driving the film 28, which is a medium for forming an image on the recording paper 12. At this time, the film 28 is attached to the first driving unit 24, and the film 28 having an image formed on the recording paper 12 is wound on the second driving unit 26.

Between the first driving unit 24 and the second driving unit 26 is installed a pressure roller 30 for transferring the recording paper 12 while pressing the recording paper 12 and the film 28 to be in close contact with a certain pressure. do. One side of the second driving unit 26 senses the rear end of the recording paper 12 conveyed by the pressing roller 30 to detect the pressing roller 30, the first driving unit 24, and the second driving unit 26. The second sensor 32 to stop the is installed in the downward direction.

On one side of the second sensor 32, a second feed roller 34 for feeding the recording paper 12 transferred by the rotation of the pressure roller 30 to the exit roller 40 side is installed to be engaged with each other. On one side of the second conveying roller 34, a second guide portion 36 for guiding the recording paper 12 to be conveyed toward the exit roller 40 is provided upward.

A third sensor 38 is installed on one side of the second feed roller 34 to detect jams of the recording paper 12. On the upper part of the third sensor 38, an exit roller 40 for discharging the recording paper 12 having an image formed on the tray 42 side is provided to be engaged with each other.

In addition, at the lower ends of the first and second driving units 24 and 26, a light source is switched to a heat source 80 to separate ink from the film 28 to form an image on the recording paper 12. Heat / dot-generating unit 44 is installed.

In this case, the configuration of the heat / dot-generation unit will be described in detail with reference to FIG. 4.

The heat / dot-generating unit 44 detects the heat source 80b by printing unit 44a for converting a light source into a heat source 80a to form an image on the recording paper 12, and detects the recording paper ( And a detection section 44b which controls the next line on 12) to be printed continuously.

That is, the printing unit 44a is provided with a xenon lamp 58 that emits a light source by a printing signal. One side of the xenon-lamp 58 is provided with a reflector 56 reflecting the light source of the xenon-lamp 58.

The other side of the xenon-lamp 58 is provided with a condensing lens 60 for converting the light source into a heat source 80a. A stopper 62 is formed at one side of the condenser lens 60 to block scattered light sources and heat sources to form dots of a predetermined size.

One side of the stopper 62 is provided with a shutter 64 for controlling the image to be formed by turning on / off the heat source 80a. One side of the shutter unit 64 is provided with an acromatic lens 66 for uniformly passing the heat source 80a controlled by the shutter unit 64 to a desired size.

An aperture 68 is provided at one side of the ecromatic-lens 66 to block the scattered heat source and the light source. One side of the aperture 68 is provided with a cylindrical lens (70) for controlling the heat source (80a) in order to close the size of the dot (82) to a circle.

One side of the cylindrical lens 70 is formed with a polygonal first mirror 46 for scanning while rotating the heat source (80a). The heat source 80a is scanned toward the film 28 after adjusting the distance so that a dot 82 having a predetermined size is formed on the plane of the recording paper 12 on the first mirror 46. The first lens 48 and the second lens 50 are installed.

One side of the second lens 50 reflects the heat source 80a controlled to the size of the dot 82 by the first lens 48 and the second lens 50 toward the film 28. The second mirror 52 and the third mirror 54 are installed as shown in FIG. At this time, the second mirror 52 and the third mirror 54 are installed while maintaining a constant angle to each other.

In addition, the detection unit 44b of the heat / dot-generating unit 44 is provided with a reflection mirror 72 for reflecting the heat source 80b reflected by the first mirror 46 toward the detection lens 74. . One side of the reflective mirror 72 is provided with a slit 76 for passing the reflected heat source 80b. On one side of the slit 76 is a photo-diode (78) which detects the heat source 80b passing through the slit 76 and controls the next line to be printed. Is installed.

Referring to the operation and effects of the present invention configured as described above are as follows.

As shown in FIG. 3, when a printing signal is applied to the controller 22, the controller 22 drives the pickup roller 14. Thereafter, the pickup roller 14 rotates counterclockwise to feed the recording paper 12 mounted on the cassette 10 to the first feed roller 18 side. Thereafter, the recording paper 12 is moved along the first guide portion 16 and conveyed to the first sensor 20 by the rotation of the first feed roller 18.

Thereafter, the first sensor 20 detects the tip of the recording paper 12 to operate the pressure roller 30, the first driver 24, and the second driver 26. At the same time, the heat / dot-generating portion 44 is operated by the signal of the first sensor 20 and the recording paper 12 is moved between the film 28 and the pressure roller 30 according to the image data. It is printed.

Here, referring to FIG. 4, the operating state of the heat / dot-generating unit 44 will be described in more detail. At the same time as the operation of the system, the first mirror 46 starts to rotate clockwise, and the xenon-lamp ( 58 receives a printing signal from the controller 22 and emits a light source.

The light source is then reflected through the reflector 56 and focused. Thereafter, the light source reflected by the reflector 56 is converted into the heat source 80a while passing through the condenser lens 60. Thereafter, the heat source 80a is controlled to form a dot of constant size through the stopper 62.

Thereafter, the shutter unit 64 controls the image to be formed while turning on / off the heat source 80a passing through the stopper 62. Thereafter, the heat source 80a passing through the shutter unit 64 is uniformly controlled to a desired size while passing through the achromatic lens 66 again. Thereafter, the light source 80a passes through the aperture 68.

Thereafter, the light source 80a is reflected by the first mirror 46 rotating through the cylindrical lens 70, and then the light source 80a is scanned by the first lens 48 on the first mirror 46. It is done.

Thereafter, as shown in FIG. 5, the heat source 80a is formed such that a dot 82 having a predetermined size is formed on the plane of the recording paper 12 through the first lens 48 and the second lens 50. It is injected into the film 28.

Then, when the heat source 80a touches the film 28, the ink of the film 28 is separated to form a high resolution image on the recording paper 12.

At the same time, the heat source 80b reflected from the first mirror 46 is reflected by the reflecting mirror 72 and passes through the detection lens 74 and the slit 76 and is scanned by the photo-diode 78. . The photo-diode 78 then detects this and transmits it to the control unit 22, which continuously prints the next line on the recording paper 12.

Thereafter, the recording paper 12 on which the high resolution image is formed by the operation of the heat / dot-generating portion 44 is moved toward the exit roller 40 by the second feed roller 34 as shown in FIG. Are transferred. Thereafter, the second sensor 32 detects the rear end of the recording paper 12 to stop the pressing roller 30, the first driving unit 24, and the second driving unit 26.

Then, the recording paper 12 is moved to the exit roller 40 along the second guide portion 36, and the recording paper 12 is then moved by the tray 42 by the rotation of the exit roller 40. Is discharged to the side. At this time, when the recording paper 12 is jammed in the image forming apparatus, the third sensor 38 detects this and transmits the jam to the controller 22.

As described above, the thermal transfer type image forming apparatus according to the embodiment of the present invention forms an image on the recording paper using a xenon lamp without using the thermal transfer head, so that the resolution of the printer on the recording paper is 600 dpi ( dot per inch) up to 1200dpi, and the printing speed can be improved due to the high speed of the thermal transfer method, and the simple structure makes A / S easy, which allows the user to There is an effect that can improve the reliability.

Claims (7)

(delete) In the thermal transfer image forming apparatus, The image forming apparatus includes a cassette 10 on which a recording sheet 12 is mounted, a first conveying roller 18 and a second conveying roller 34 for conveying the recording sheet 12, and the recording sheet 12. A pressure roller for pressurizing the first and second driving portions 24 and 26 to move the film 28, which forms an image thereon, and the recording paper 12 and the film 28 at a constant pressure. 28, a first sensor 20 for sensing the tip of the recording paper 12 to operate the pressure roller 30, the first driving unit 24 and the second driving unit 26, and a light source as a heat source. A heat / dot-generating part 44 which switches to form an image on the recording paper 12, and detects the rear end of the recording paper 12 to detect the pressing roller 30 and the first driving part 24; And a second sensor (32) for stopping the second driver (26). According to claim 2, wherein the first sensor 20 is installed between the first feed roller 18 and the pressure roller 30, the second sensor 32 is the pressure roller 30 and the second Thermal transfer type image forming apparatus, characterized in that provided between the transfer roller (34). 3. The thermal transfer image forming apparatus according to claim 2, wherein a third sensor (38) for detecting a jam of the recording paper (12) is installed on one side of the second feed roller (34). An apparatus for separating ink from a film, which is a medium for forming an image on recording paper, The heat / dot-generating portion 44, which is an apparatus for separating ink from the film 28, includes a printing portion 44a for converting a light source into a heat source to form an image on the recording paper 12, and a heat source. And a detection unit (44b) for sensing and controlling the next line to be continuously printed on the recording paper (12). 6. The printing unit (44a) according to claim 5, wherein the printing unit (44a) includes a xenon lamp (58) for emitting a light source by a printing signal, a reflector (56) for reflecting the light source, and a switch for converting the light source into a heat source (80a). A condenser lens 60, a stopper 62 for blocking scattered light sources and a heat source, a shutter 64 for controlling an image to be formed by turning the heat source 80a on and off, and the heat source 80a. Controlling the heat source 80a so that the size of the dot 82 is close to a circular shape; an ecromatic-lens 66 for uniformly passing the desired size; an aperture 68 for blocking scattered heat sources and light sources; After adjusting the distance so that the cylindrical lens 70, the first mirror 46 for scanning while rotating the heat source 80a, and a dot 82 of a predetermined size are formed on the plane of the recording paper 12. It consists of a first lens 48 and a second lens 50 for scanning the heat source (80a) to the film 28 side, The detector 44b includes a reflection mirror 72 reflecting the heat source 80b reflected by the first mirror 46 toward the detection lens 74, and a heat source 80b passing through the reflection mirror 72. And a photo-diode (78) for controlling the detection of the next line so that the next line can be printed. 7. The thermal transfer image forming apparatus according to claim 6, wherein the first mirror (46) is formed in a polygon.