JP3073380U - Projector - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a multifunctional projector. SOLUTION: A concave reflector 2 is provided on a main body 1, a bulb 3 is provided at an appropriate position above the concave reflector 2, and a condenser lens 4 and two frame lenses 5 are sequentially arranged on the bulb 3. Arranged in
One side of the main body 1 has a column 6, a projection lens 7 at an upper end of the column 6, and a plane reflecting mirror 8 whose angle can be adjusted above the projection lens 7, and emits light from the bulb 3. In this case, after projecting the light through the condenser lens 4 and the frame lens 5 to the projection lens 7 and then reflecting the light through the plane reflecting mirror 8, the material image on the frame lens 5 is projected on the front projection screen. At the time of use, it is possible to select to project the material on the display 11 to a projection screen in front by connecting to a computer, or to use it as a general projector. Therefore, in the office, if a single set of equipment is provided, explanations can be made corresponding to various projection materials.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a projector, and more particularly, to connect an OHP (Overhead Projector) to a computer or to use a conventional projection film to display information in a computer or a projection film material. The present invention relates to a projector that projects onto a (screen) and has a large screen visual effect.

[0002]

[Prior art]

 The OHP projects the data of a projection film onto a large projection screen in front by an optical principle using a basic optical lens and a frame lens (Fresnel Lens). It is used for educational training, commentary, and meetings. However, as a result of its widespread use for several decades, such a conventional black-and-white format of commentary has become unable to meet the standards required by humans with the spread of information by computers. Therefore, liquid crystal projectors have become increasingly popular in recent years.

An advantage of the liquid crystal projector is that it can display a color moving image when connected to a computer, and is light and easy to hold. High cost Especially when using a special optical engine and a small LCD or DLP (Digital Light Processor) which is rarely used, the cost cannot be reduced and it is unlikely to become popular like OHP. . Therefore, a user who intends to perform display using such a method needs to prepare a computer and an LCD projector at the same time.

B. Lack of brightness. The brightness of a general OHP is from 2000 lumens (ANSI Lumens) to 7500 lumens, but the brightness of a liquid crystal projector is currently from 300 lumens to 2000 lumens. Incidentally, the value of a 2000 lumen liquid crystal projector is at least 10,000 US $, but the value of a 2000 lumen OHP is 250 to 300 US $.

C. It is not possible to use a conventional projection film (Transparency Film). In the case of actual simple display, users rarely need to edit and produce using a large amount of software, and then connect the computer to the LCD projector to execute the display. By writing relatively simple diagrams and characters, or figures that cannot be displayed by a computer, on a projection film and placing them on an OHP, they can be displayed immediately. Such advantages as convenience, rapidity, and universality cannot be achieved by a liquid crystal projector.

[0006]

[Problems to be solved by the invention]

 Therefore, a main object of the present invention is to provide a multifunctional projector. In addition, it is inexpensive and has not only the functions and advantages of traditional OHP and liquid crystal projectors at the same time, but also is easy to use and can be widely used.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the projector of the present invention has a concave reflector on the main body, a bulb at a suitable place above the concave reflector, and a condenser lens and two lenses on the bulb. The frame lenses are arranged in order, a column is provided on one side of the main body, a projection lens is provided at the upper end of the column, and a flat reflecting mirror whose angle is adjustable above the projection lens is provided. When irradiating light from a light bulb, the light is projected through a condenser lens and a frame lens to a projection lens, and then reflected through a plane reflector, so that the material image on the frame lens is projected to the front projection screen. .

The feature is that the main body has an electronic circuit board of a liquid crystal display, and the electronic circuit board is a device which can convert an analog signal into a digital signal and drives the liquid crystal display. An input terminal which is extended and fixed to the main body. And has a loading port on one side of the body, which can be extracted and moved to be placed between (or on) the two frame lenses into the loading port. It consists in connecting the liquid crystal display to the electronic circuit board by loading the liquid crystal display.

During use, a method of connecting to various computers can be selected, so the data in the computer is transferred and displayed on the liquid crystal display of the main unit, and the light emitted from the bulb is collected by a condenser lens, a frame lens and the above-mentioned liquid crystal. After passing through the display, the image data on the liquid crystal display is projected onto the projection lens, and then reflected through the plane reflector to the large projection screen in front of the projector, or the liquid crystal display is extracted from the frame lens on one side of the main unit. If this would increase light transmission, ordinary projection films could be used. Therefore, in the office, if one set of equipment is provided, explanations can be made for various projection materials. Moreover, since the price is lower than that of a known liquid crystal projector, it must be widely used.

[0010]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, as shown in FIGS. 1 to 5, a projector according to an embodiment of the present invention has a concave reflector 2 on a main body 1 and a bulb 3 at an appropriate place above the concave reflector 2. The condenser lens 4 and the two frame lenses 5 are installed in this order on the bulb 3, and the column 6 is provided on one side of the main body 1, and the projection lens 7 is provided on the upper end of the column 6. A flat reflecting mirror 8 whose angle can be adjusted is provided above the projection lens 7. When the light is emitted from the bulb 3, the light is projected onto the projection lens 7 through the focusing lens 4 and the frame lens 5, and then the flat reflecting mirror is used. The material image on the frame lens 5 is projected onto the projection screen 9 in front by being reflected through the projection lens 8.

The feature is that the main body 1 has an electronic circuit board 10 of a liquid crystal display, and the electronic circuit board 10 is a device which can convert an analog signal into a digital signal and drives the liquid crystal display 11. In addition, an input terminal 12 extending and fixed to one side of the main body 1 is provided, and a loading port 13 is provided beside the other side of the main body 1, and the loading port 13 is provided between the two frame lenses 5. (See FIG. 4) or loading an extractable and movable liquid crystal display 11 (a liquid crystal screen having translucency) on two frame lenses 5 (shown in FIG. 5). Thus, the liquid crystal display 11 and the electronic circuit board 10 are connected. With the structure described above, the liquid crystal display 11 can be extracted from the charging opening 13 of the main body 1 as shown in FIG.

In the above description, the projection effect is achieved by installing a power source (not shown in the figure because of a well-known structure) of a metal light bulb for illuminating the light bulb 3 in the main body 1. In addition, in this embodiment, when the projector is not used, as shown in FIG. 6 (in this embodiment, the loading port 13 is installed on the front side of the main body), the support 6 and the main body 1 can be folded.

In the present embodiment, the data in the computer 14 is connected to the input terminal 12 on one side of the main body 1 and the computer 14 (in this embodiment, a laptop computer is used as a model) during use. The data is transferred to the liquid crystal display 11 in the entrance 13 of the main body, and the data in the computer 14 is displayed on the light-transmitting liquid crystal display. After passing through the liquid crystal display 11, the image data on the liquid crystal display 11 is projected onto the projection lens 7, and further reflected on the large projection screen 9 in front of the projector via the plane reflecting mirror 8, whereby the liquid crystal projector Reach the effect.

In this embodiment, as shown in FIG. 3, during use, the liquid crystal display 11 is extracted from above the frame lens 5 in the main body 1, and thereafter, is extracted above the frame lens 5 (ie, above the frame lens 5). If an ordinary projection film 15 is placed on the tabletop of the projector, it can be used as a conventional projector. Moreover, the brightness of the light is high, and the projection effect is more pronounced. Therefore, in the office, if one set of equipment is provided, it can correspond to various projection films or computer explanations brought by customers or commentators, so it can only be used as a general projector. Instead, it can be used as a liquid crystal projector. It should be widely used by users because it is easy to operate and the price is lower than that of a known LCD projector.

[Brief description of the drawings]

FIG. 1 is a combined perspective view showing a projector according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state in which the projector and the computer according to the embodiment of the present invention are connected and used.

FIG. 3 is a diagram illustrating a state in which the projector according to the embodiment of the present invention is used as a general projector;

FIG. 4 is a sectional view showing the projector according to the embodiment of the present invention;

FIG. 5 is a sectional view showing a projector according to another embodiment of the present invention;

FIG. 6 is a view showing a state in which the projector according to the embodiment of the present invention is folded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Concave reflector 3 Light bulb 4 Condenser lens 5 Frame lens 6 Prop 7 Projection lens 8 Planar reflector 9 Projection screen 10 Electronic circuit board 11 Liquid crystal display 12 Input terminal 13 Installation entrance 14 Computer 15 Projection film

Claims (2)

[Utility model registration claims] 1. A body having a concave reflector, a bulb at an appropriate position above the concave reflector, a condenser lens and two frame lenses arranged in order on the bulb, It has a support on one side of the main body, has a projection lens at the upper end of the support, and has a plane reflecting mirror whose angle can be adjusted above the projection lens. A projector for projecting a data image on the frame lens to a front projection screen by projecting an optical lens and the frame lens to a projection lens, and then reflecting the light through the plane reflector, wherein the main body has a liquid crystal. A display electronic circuit board, wherein the electronic circuit board is a device that can convert an analog signal to a digital signal and drives a liquid crystal display, and the electronic circuit board has an input terminal that is extended and fixed to the main body. The liquid crystal display having an inlet on one side of the main body, wherein the liquid crystal display is mounted on the electronic circuit board by inserting an extractable and movable liquid crystal display between the two frame lenses. A projector connected to the projector. 2. The projector according to claim 1, wherein the extractable and movable liquid crystal display can be installed on two frame lenses.