JPH0246438A - Projector - Google Patents

Abstract

PURPOSE:To display the image of an original without delay and to heighten immediacy by setting a thermal recording material which consists of a transparent thermal and color-developing layer formed on a transparent supporting body on a projecting position, color-developing the material and recording and projecting the image. CONSTITUTION:A personal computer is operated and light from a light source 32 is projected on the Fresnel lens 24 of a projecting plate 22. Besides, a conveying roller 20 is operated and the thermal recoding material 14 is sent onto the plate 22. The material 14 consists of the transparent thermal and color-developing layer placed on the transparent supporting body. In the next step when the material 14 reaches the lens 24, a thermal head 40 is operated corresponding to an image signal and the material 14 is heated and color- developed. Then, an image corresponding to image information is orderly recorded to the material 14 and simultaneously with the recording operation, it is projected on a screen 37 through the use of a projecting optical part 30.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a projector that projects an image of a document set at a projection position.

[Prior Art] Among display devices, overhead projectors and slide projectors have the advantage of being able to display large screens, being compact and inexpensive, and are used in various fields.

These projectors are equipped with an optical system such as a light source and a projection lens, and emit light from the light source onto a document set at a projection position, and the reflected or transmitted image light is focused onto a screen by the projection lens. It is designed to give an image.

[Problems to be Solved by the Invention] By the way, due to the nature of this projector, it is necessary to use an original in which an image is recorded on a transparent recording material. For this reason, conventionally, an image to be displayed on a large screen by this projector is first recorded on a transparent recording material by an image recording device such as a printer, and then a document dedicated to the projector that can be used for the projector is created. was prepared. Therefore, the conventional projector
Although this method can be displayed on a large screen, it requires time and effort to prepare a special manuscript, and has the drawback of lacking immediacy.

The present invention takes the above-mentioned facts into account and aims to provide a projector that can display an image of a document without delay in accordance with image information.

[Means for Solving the Problems] A projector according to the present invention is a projector that projects an image of a document set at a projection position, and includes a transparent thermosensitive material that is set at the projection position and develops color according to the amount of heating. It is characterized in that it is equipped with a recording head that heats the heat-sensitive recording material in which the color-forming layer is laminated on a transparent support to cause the transparent heat-sensitive color-forming layer to develop color.

[Function] In the projector configured as described above, a heat-sensitive recording material in which a transparent heat-sensitive coloring layer that develops color depending on the amount of heat is laminated on a transparent support is set at a projection position. When projecting an image, the image is projected while the heat-sensitive recording material set at the projection position is heated by the recording head to develop color in the transparent heat-sensitive coloring layer, that is, while recording the image on the heat-sensitive recording material. Ru.

Therefore, the provided image information is displayed without delay, and the immediacy is greatly improved.

[Example] FIG. 1 shows a schematic configuration diagram of a projector 10 according to an example of the present invention, and FIG. 2 shows a projector 10 according to an example of the present invention.
A schematic cross-sectional view of the main parts of 0 is shown.

Inside the base 12 of the projector 10 is a heat-sensitive recording material 1.
4 is stored in a rolled-up state.

As shown in FIG. 2, the heat-sensitive recording material 14 has a support 16 made of a transparent polyester film, and furthermore, a transparent coloring layer 18 is provided on one surface of the support 16 (top surface in FIG. 2). has been painted. This coloring layer 18 is transparent at room temperature, but becomes colored by a predetermined amount of thermal energy.

Further, a conveyance roller 20 is disposed within the machine stand 12 of the projector 10, and is adapted to sequentially pull out the heat-sensitive recording material 14 wound into a roll and convey it in a pinched manner. This conveyance roller 20 is driven by a drive means (not shown), and is further connected to a control circuit 50, which will be described later, via a driver 21.

The upper surface of the machine stand 12 on the downstream side in the direction of conveyance of the heat-sensitive recording material is a projection stand 2.
2, and the thermosensitive recording material 14 conveyed by the conveyance roller 20 is sent onto this projection table 22.

A Fresnel lens 24 is arranged on the projection table 22,
The fed heat-sensitive recording material 14 is attached to this Fresnel lens 2.
It is located above 4.

Further, a reflecting mirror 26 is disposed below the Fresnel lens 24 to reflect the light passing through the Fresnel lens 24 above the projection table 22.

Directly above the projection table 22 is a projection optical section 3 via an arm section 28.
0 is placed. Inside the projection optical section 30, a light source 32 is provided.
, a projection lens 34 and a reflecting mirror 36 are arranged,
Light is irradiated onto the Fresnel lens 24 of the projection table 22, and the reflected light from the reflecting mirror 36 is further formed into an image on a screen 37.

A guide rail 3 is provided on the side of the projection table 22 along the width direction of the heat-sensitive recording material 14 conveyed by the conveyance roller 20.
8, the rack has been passed, and the guide rail 38 has
A thermal head 40 serving as a recording head is movably attached.

The thermal head 40 is connected to the Fresnel lens 24 of the projection table 22.
, and its head portion is located within the irradiation range of light from the light source 32 (in other words, within the projection range). Therefore, the thermal head 40 is connected to the Fresnel lens 2.
The coloring layer 18 can be colored by heating the heat-sensitive recording material 14 located above the coloring layer 18.

This thermal head 40 is connected to a scanning morph 42, and by driving this scanning morph 42, it moves along the guide rail 38, that is, the thermal recording material 1
4 in the width direction.

These thermal head 40 and scanning morph 42 are connected to a control circuit 50 via drivers 44 and 46, and are operated based on image signals.

A sensor 48 is arranged below the thermal head 40 and on the side of the Fresnel lens 24 . The sensor 48 detects the heat-sensitive recording material 14 when the heat-sensitive recording material 14 transported by the transport roller 20 is positioned on the Fresnel lens 24.
It has a function of detecting the tip of the thermal head 40 and determining the timing for operating the thermal head 40. This sensor 48 is also connected to the control circuit 50.

The control circuit 50 includes a CPU 52, a RAM 54, and a ROM 56.
, a buffer memory 58, an input port 0, an output port 2, and a bus 64 such as a data bus or a control bus connecting these.

The sensor 48 is connected to the input port 0, and a position detection signal of the heat-sensitive recording material 14 is input thereto. A personal computer 66 is also connected to the input port 0, and by operating the personal computer 66 a series of image recording processes is started and image information is supplied.

Connected to the output port 2 are drivers 2L44 and 46 for the conveyance roller 20 (not shown), the thermal head 40, and the scanning motor 42, so that their respective drives can be controlled.

Next, the operation of this embodiment will be explained according to the control flowchart shown in FIG.

When the personal computer 66 is operated in step 100, a series of image recording and projection processing is started, and the light source 32 irradiates light onto the Fresnel lens 24 of the projection table 22, and the conveyance roller 20 is activated in step 102. The heat-sensitive recording material 14 is fed onto the projection table 22.

Further, in step 104, it is determined whether the sensor 48 has detected the leading end of the heat-sensitive recording material 14, that is, whether the heat-sensitive recording material 14 has been positioned on the Fresnel lens 24. If the heat-sensitive recording material 14 is not located on the Fresnel lens 24, the process advances to step 106, where a display to that effect is made, and then the process returns to step 102.

When the heat-sensitive recording material 14 reaches the Fresnel lens 24 and the sensor 48 detects the leading edge of the heat-sensitive recording material 14, the process proceeds to step 108, where the conveying roller 20 stops, and further, in step 110, whether the image information signal is manually input or not. It is determined whether or not the image is recorded on the heat-sensitive recording material 14, and a standby state is entered.

When the image information signal is input manually, image recording is started, and at step 112 the scanning motor 42 is activated, and at step 114 the thermal head 40 is activated in accordance with the image information signal.

The thermal head 40 corresponds to the heat-sensitive recording material 14 located on the Fresnel lens 24, and heats the heat-sensitive recording material 14 to cause the coloring layer 18 to develop color, thereby recording an image on the heat-sensitive recording material 14 according to the image information. be done.

In this case, since the head portion of the thermal head 40 is located within the irradiation range of the light from the light source 32 (in other words, within the projection range), the projection optical unit 30 displays this image on the screen 37 at the same time as recording the image. is projected. Therefore, the supplied image information is displayed without delay, and the immediacy is greatly improved.

When image recording is started, it is determined in step 116 whether recording for one line has been completed.

If the process has not been completed, the process returns to step 112 and the above-described process is repeated, and then the process proceeds to step 118, where the heat-sensitive recording material 14 is fed by one line by the operation of the conveying roller 20. Further, in step 120, it is determined whether the manually inputted image information signal has been completed, and if it has not been completed, step 11
After returning to step 2 and repeating the above steps, the process ends.

In this way, since the image recorded on the heat-sensitive recording material 14 is projected at the same time as recording, there is no need to prepare a special original for image projection, eliminating the need for the time and effort, and allowing the image to be recorded without delay depending on the image information. The image can be displayed.

In this example, the heat-sensitive recording material 14 is the support 1
Although the structure uses a structure in which the coloring layer 18 is coated only on one side of the support 16, that is, one capable of recording a monochromatic image, the present invention is not limited to this. Using a multicolor heat-sensitive recording material having a structure coated with multiple coloring layers that develop different colors using different colors, and further arranging multiple thermal heads corresponding to the amount of coloring heating for each coloring layer,
It is also possible to have a configuration in which each coloring layer develops a color, respectively.

In this case, a color image is obtained.

Further, in this case, each coloring layer may be colored by a single thermal head that can change the amount of heating.

Further, in this embodiment, the projector 10 is an overhead type projector, but is not limited thereto, and may be a slide type projector.

In this case, the external shape of the device can be vertically compact.

[Effects of the Invention] As explained above, the projector according to the present invention has the effect of being able to display an image of a document without delay according to image information.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a projector according to the present invention, FIG. 2 is a schematic sectional view of main parts of the projector, and FIG. 3 is a control flowchart. DESCRIPTION OF SYMBOLS 10... Projector 14... Thermosensitive recording material, 16... Support body, 18... Coloring layer, 22... Projection stand, 30... Projection optical part, 40... Thermal head, 50...control circuit.

Claims (1)

[Claims] (1) A projector that projects an image of a document set at a projection position, which heats a thermosensitive recording material that is set at the projection position and has a transparent thermosensitive coloring layer laminated on a transparent support that develops color according to the amount of heating. A projector characterized by being equipped with a recording head that causes a transparent thermosensitive coloring layer to develop color.