JP3057778B2 - Projector device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector.

[0002]

2. Description of the Related Art FIG. 16 is an external view of an example of a conventional liquid crystal projector. In the figure, 91 is an external case, 92 is an electric focus switch, 93 is a projection angle adjustment pedal, 94 is a projection lens, and 95 is a built-in speaker. On the rear surface of the outer case 91, a power switch, various adjustment knobs, and various input terminals are provided. The inside of this is a thin film transistor (TF) in a liquid crystal panel.
T) Three polycrystalline silicon TFT active matrix panels with a large number of built-in pixels and a high-density matrix are arranged, and the light from the light source is decomposed by a dichroic wavelength selection mirror. , Green,
The blue light is modulated, combined with a dichroic prism, and projected from the projection lens 94.

This projector device is connected to a video source such as a VCR, a laser disk, a personal computer or the like, and is turned on.
The color depth is adjusted, the focus is adjusted by the electric focus switch 92, the projection angle is adjusted by the pedal 93, and the image is projected on a screen, a wall, or the like, so that an image having a large screen size is viewed.

[0004]

However, the conventional projector has a main purpose of pursuing a large screen and high image quality, and its use is limited to indoors, and its portability and close adherence to daily life are high. The ease of use was not considered much.

[0005] The present invention has been made to solve these problems, and can be used in various living situations.
It is another object of the present invention to provide a projector device which is excellent in portability and usability.

[0006]

[0007]

A projector apparatus according to the present invention includes a light source, a modulator for modulating light emitted from the light source, and a projection lens for projecting the light modulated by the modulator. A projector apparatus having a main body, comprising a projection lens cover usable as a stand for supporting the projector main body.

[0008]

[0009]

[0010]

[0011]

According to the present invention, the projection angle can be easily adjusted.

[0012]

[0013]

[0014]

FIG. 1 is a schematic sectional view showing a reference example of the present invention. In the figure, 1 is a liquid crystal projector main body,
Reference numeral 2 denotes a supporting portion that rotatably supports the projector main body, 3 denotes a screen bar that holds a roll type screen 4, 5 denotes a control circuit that electrically controls the projector, 6 denotes a power unit of the projector, and 7 denotes a lamp. A unit, 8 is a condenser lens, 9 is an LCD panel, 10 is a front projection and rear projection lens,
It consists of a fan lens. Reference numeral 11 denotes a cooling fan, 12 denotes an operation unit that can be used also as a remote control device, and 13 denotes a projection port.

FIG. 2 is an exemplary view showing the connection between the projector main body and the support. 1 is a main body part, 2 is a support part. The bottom of the main body 1 is formed in an inverted L-shape, the upper part of the support 2 enters the L-shaped groove, and rollers 14 are provided at a plurality of positions on the support 2 side, so that the main body 1 slides. You can rotate.

FIG. 3 is a diagram showing an example of mounting a roll type screen on the projector main body. The roll type screen 4 includes a winding section 4a, a screen 4b, and a frame 4c.
Consists of The screen 4b is usually wound inside the winding section 4a. To mount the roll type screen 4 on the projector main body 1, the winding section 4a is fitted to the projection port 13 of the main body 1 and held. After the screen 4b is pulled out, the hook at the tip of the frame 4c is hung on the screen bar 3 and fixed as shown by the broken line. The screen 4b is made of a synthetic resin such as ABS, and the frame 4c is made of aluminum. The size of the front surface (projection surface) of the screen 4b is about 14 inches square.

Next, the operation of the projector having this configuration will be described. First, if the front projection without the roll screen 4 is performed, a large screen can be viewed. If the rear projection is performed with the roll screen 4 mounted, the screen 4b can be viewed.
The image on the front of the camera. In any of the front projection and the rear projection, the projection angle can be instantaneously changed by rotating the main body 1. At this time, the projection lens 10 serving as a tilting lens acts to suppress a change in the shape of the image screen. Here, the tilting lens will be described.
As shown in FIG. 4, a normal lens has different enlargement ratios between the center and the outside, and blurs in a perfect circle from the center to the outside. On the other hand, the tilting lens has a lens as shown in FIG. Is optically cut, and the way of blurring to the periphery is blurred with a slight shift instead of a perfect circle. By using the tilting lens as the projection lens, it is possible to prevent a change in the shape of the video screen due to a change in the projection angle, for example, a difference in the vertical length of the video screen from occurring to some extent.

The operation unit 12 includes TV-video switching, UHF-VHF switching, channel, focus,
There are switches for zoom, power, etc. If a handle is provided in the main body 1, it is convenient for adjusting the projection angle and moving the projector. In addition, the optical system operates on the same principle as that described in the conventional example.

[0019]

FIG. 6 is an external view showing an embodiment of the present invention. 21 is a single-panel type liquid crystal projector main body, 22, 2
Reference numeral 3 denotes a projection liquid crystal panel and a remote control device which are detachable from the projector main body 21.
24 is a projection lens, 25 is a speaker, 26 is a lens cover / stand, and 27 is a carrying handle. The lens cover / stand 26 protects the projection lens 24 when the projector device is not used, and rotates downward when the projector device is used to adjust the projection angle as a stand of the projector body 21. Further, the remote control device 23 has a built-in backlight on the back side of the operation surface, and as shown in FIG.
If the backlight 2 is set to project a backlight, it alone has a function as a television.

FIG. 8 is a block diagram showing the optical system of the liquid crystal projector shown in FIG. The light from the light source lamp 28 is collected by a condenser lens 29, passes through one liquid crystal panel 22 via a mirror 30, and further passes through the projection lens 2.
Project from 4 to get an image. This method is called a single-panel method, and is distinguished from a method in which red, green, and blue lights pass through different liquid crystal panels, and are then combined into one light and projected again.
Since the single-plate type requires only one optical system, the size and weight of the apparatus can be reduced.

FIG. 9 is a block diagram showing a main electrical configuration of the liquid crystal projector shown in FIG. The liquid crystal panel 22 includes a UHF-VHF tuner 31 for TV radio wave reception, an amplification detection circuit 32 for a signal from the tuner 31 or a video signal, an audio amplification circuit 33, a chroma signal demodulation circuit 34, red (R) green (G) blue. (A) Switching circuit 3
5, an X / Y drive circuit 36 for a color display unit, a vertical / horizontal drive control circuit 37, and a color display unit 38. The remote control device 23 includes an operation unit 41, a control signal transmission circuit 42, a backlight 43, and a backlight drive circuit 44. The control device 23 is operably mounted even when mounted on the projector main body 21. The operation unit 41 includes TV-Video switching, UH
There are switches for F-VHF switching, channel switching, channel indicator, projection lens zoom, projection lens focus, and backlight ON / OFF. The projector main body 21 also has a power switch.

In addition, assuming that the projector apparatus is used outdoors, the case of the projector body 21 is made of a mixture of plastic such as ABS and rubber and has a thickness of 3 to 5 mm. Ribs are provided at multiple locations on the inside to increase strength, and the case surface is waterproofed. This makes it possible to obtain a projector device that is resistant to impact and water and that can withstand outdoor use.

[0023]

FIG. 10 is an external view showing a reference example of the present invention. Reference numeral 51 denotes a cylindrical projector main body, and 52 denotes a carrying handle extending vertically from both sides of the main body 51 and having a grip upward. Reference numeral 53 denotes an upper cover of the main body 51, which is a cap that slides up and down along a handle 52 and rotates around a fulcrum, 54 is a power cord and a video code winding switch, and 55 is a power cord and a video cord. The drawer hole 56 is a power switch.

FIG. 11 is an internal configuration diagram of FIG. The optical system of the projector body 51 includes a lamp unit 5
7, the condenser lens 59, the liquid crystal panel 60, and the projection lens 61 are configured to be directed upward from below.
The projector body 51 further includes a power unit 58, a focus mount 62 for supporting a projection lens 61, a cooling fan 63, a code winding unit 64, and the like. Also, inside the cap 53,
A mirror 65 that reflects the projection light from the projection lens 61 is provided.

Next, a method of using the projector device will be described with reference to FIG. In the figure, FIG.
0 and the same reference numerals as those in FIG. First, the power cord 66 and the video cord 67 are connected to a power source and a video source, respectively (FIG. 12). Next, the cap 53 is slid upward (FIG. 12). Next, the projection angle is adjusted by rotating the cap 53 to change the angle of the mirror 64 (FIG. 12). Next, the focus mount 62 is rotated to focus (FIG. 12). Finally, the power switch 56 is turned on (FIG. 12). As described above, in this projector device, since the switch is only the power on / off switch, anyone can easily handle it.

FIG. 13 is a perspective view when the screen device is used. Reference numeral 71 denotes a screen of about 50 inches, which is made of a flexible synthetic resin having a high reflectance with a white or silver color. Reference numerals 72, 73 denote cases on both sides of the screen 71, which are made of plastic, wood, or the like. Reference numeral 74 denotes a screen overturn prevention arm, which includes a left arm 74a and a right arm 74b, and is normally housed in an arm groove 75 on the left and right cases 72 and 73, respectively, on the opposing surfaces of the left and right cases. When the screen device is used, it is pulled out from the arm groove 75 and laid down, and the left and right arms 74a, 74
The tip of b is hooked to form a triangle with one side of the screen 71 to prevent the screen device from tipping over. In addition,
The upper and lower ends of the screen 71 are preferably reinforced such that the screen is thicker than other places in order to prevent breakage or sagging.

FIG. 14 is a perspective view showing a state where left and right cases of the screen device of FIG. 13 are closed. This is because the screen fall prevention arm 74 is housed in the arm groove 75,
After the screen 71 is wound by a winding unit (not shown), the left and right cases 72 and 73 are locked. 76 is a carrying handle provided on the cases 72 and 73, and 77 is a lock for integrally fixing the left and right cases. For example, locks are provided at locations A, B, etc.
This can be done by providing a magnet or by providing a snatch (hook) that slides with a spring.

FIG. 15 is a configuration diagram of the insides 72 and 73 of the case. In the present reference example, the configuration in the left and right cases is the same, and description will be made using one case 72. Reference numeral 78 denotes a speaker directed to the image projection side. When the screen device is used outdoors, it is considered that the sound source of the projector device alone is not sufficient. Therefore, the sound source is also secured on the screen device side. Further, the front surface 72a of the speaker 78 of the case 72 is formed in a mesh shape in order to make it easy for voice sounds to pass through. An amplifier 79 amplifies an input signal to the speaker 78. Reference numeral 80 denotes a connector for connecting the external device to the amplifier 79, and reference numeral 80a denotes a connector cover to which an external power supply and audio signals of the projector device are connected. In addition, a battery (charging place) 81 is built in so as to be able to cope with a case where an external power supply cannot be used. Reference numeral 82 denotes a roll-type winding unit for the screen 71. The roll is rotated by a spring, and the screen 71 is wound. The winding unit 82 may be provided on only one side of the screen 71 or may be provided on both sides.

In the above embodiment, the case where a cable is used to transfer the audio signal to the screen device has been described. However, the audio signal can be transmitted using an FM transmitter or the like by radio waves or by an infrared signal. The volume can be controlled by a remote control of the projector device. Further, in the present embodiment, an example in which the screen device is used in a state where the case is placed on the left and right is shown. However, if anchors are provided at both ends of one case and wires or the like are hung on this, the screen device with the case up and down Can also be used as

[0030]

[0031]

According to the projector device of the present invention,
The projection angle can be easily adjusted.

[0032]

[0033]

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a reference example of the present invention.

FIG. 2 is a diagram illustrating a connection structure of a projector main body and a support portion.

FIG. 3 is a diagram illustrating an example of mounting a roll-type screen on a projector main body.

FIG. 4 is an explanatory diagram of a lens cutting method.

FIG. 5 is an explanatory diagram of a method of cutting a tilting lens.

FIG. 6 is an external view showing an embodiment of the present invention.

FIG. 7 is an explanatory diagram when a liquid crystal panel is used as a television.

8 is a configuration diagram showing an optical system of the liquid crystal projector shown in FIG.

FIG. 9 is a block diagram showing a main electrical configuration of the liquid crystal projector shown in FIG.

FIG. 10 is an external view showing a reference example of the present invention.

11 is an internal configuration diagram of the projector device of FIG.

FIG. 12 is a diagram illustrating the use of the projector device of FIG. 11;

FIG. 13 is a perspective view when the screen device is used.

FIG. 14 is a perspective view showing a state where left and right cases in FIG. 14 are closed.

FIG. 15 is a configuration diagram in the case of FIG. 14;

FIG. 16 is an external view of an example of a conventional liquid crystal projector device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal projector main body 2 Support part 3 Screen bar 10 Projection lens 21 Single-panel type liquid crystal projector main body 22 Liquid crystal panel 23 Remote control device 51 Liquid crystal projector main body 52 Carrying handle 53 Cap 54 Code rewind switch 55 Code draw-out hole 56 Power switch 65 Mirror 71 Screen 72, 73 Case 74 Screen fall prevention arm 76 Carrying handle 77 Lock 78 Speaker 79 Amplifier

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiromitsu Takahashi 3-5-5 Yamato, Suwa-shi, Nagano Seiko Epson Corporation (56) References JP-A-2-282290 (JP, A) 63-47329 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 21/00 G03B 21/10 G03B 21/14

Claims (1)

(57) [Claims] 1. A projector apparatus having a projector main body comprising: a light source; a modulating unit for modulating light emitted from the light source; and a projection lens for projecting the light modulated by the modulating unit. A projector device comprising a projection lens cover usable as a stand for supporting a main body.