JPH089308A - Projection type projector device - Google Patents

Abstract

(57) [Summary] [Purpose] When the projection device body of the projection type projector device is installed upside down, the up / down / left / right of the projected image is automatically switched to inversion. [Structure] White light from a light source 1 is reflected by a reflector 2, separated into three colors of R, G, and B by a color separation optical system 3, condensed by a condenser lens 4 of each color system, and an image for each color is formed. The liquid crystal panel 5 driven by a signal is irradiated, an image of each color is generated, the color combining optical system 6 combines the images into one image, and the projection lens 7 projects the image. Attach the up / down detector 8 to the main body of the projection device,
Detect the installation status of the device. When it is detected that the projection device is installed upside down, the liquid crystal drive unit is passed through the vertical / horizontal reversing unit 9.
By 10, the scanning order of the scanning lines of the liquid crystal panel 5 is reversed upside down, and at the same time, the scanning order of the scanning lines is reversed horizontally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection type projector apparatus and, when the apparatus is installed upside down, relates to an apparatus which detects an inversion of a main body of a projection apparatus and projects the image by reversing the image vertically and horizontally.

[0002]

2. Description of the Related Art In a projection type projector apparatus, a projection apparatus main body and a screen are separate, so that the projection apparatus main body can be installed at a position higher or lower than the screen or on the ceiling depending on the conditions of the installation location. However, if the projector is installed on the ceiling using the fixtures provided for floor installation, the projected image on the screen will be upside down and left and right, so A switching operation for reversing is required. However, there is a case where it is inadvertently mounted on the ceiling without performing this switching operation, and there is a problem that the user has to climb to the ceiling for the switching operation, or has to remove it and switch again.

[0003]

In view of the above, the present invention is provided with means for detecting the vertical installation state of the apparatus in the main body of the projection apparatus, and automatically detects the vertical direction of the projected image based on the vertical detection. It is to switch so that the direction and the left-right direction are reversed.

[0004]

In order to solve the above-mentioned problems, the present invention is a projection type projector device for projecting an image generated based on a video signal on a screen, and is mounted on a projection device body to detect an installation state. And an inverting unit for inverting the vertical and horizontal directions of the image, respectively. The vertical and horizontal directions of the projected image are inverted via the inverting unit based on the signal from the vertical detection unit. A projection type projector device is provided.

[0005]

With the above configuration, in the projection type projector apparatus according to the present invention, the installation state of the projection apparatus body is detected by the up / down detection unit mounted on the projection apparatus body, and the apparatus is installed upside down. If so, the scanning order of the scanning lines is reversed upside down and the scanning order of the scanning lines is reversed laterally via the reversing unit.

[0006]

Embodiments of the projection type projector apparatus according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration diagram of a main part of an embodiment of a projection type projector apparatus according to the present invention. In the figure, reference numeral 1 denotes a light source, which emits white light by, for example, a metal halide lamp or the like. A reflector 2 reflects the light from the light source 1. A color separation optical system 3 is composed of a dichroic mirror, a total reflection mirror and the like, and separates the light source light into three color lights of red (R), green (G) and blue (B). A condenser lens 4 is provided for each color system and collects the light from the color separation optical system 3. A liquid crystal panel 5 is provided for each color system and is driven by a video signal for each color.
Each color light from the condenser lens 4 is modulated into an image of each color. 6
Is a color synthesizing optical system, which is composed of a dichroic mirror and a total reflection mirror, and synthesizes images of respective colors from the liquid crystal panel 5 into one image. A projection lens 7 projects an image from the color synthesizing optical system 6 on a screen (not shown).

Reference numeral 8 denotes an up-and-down detector which is mounted on the main body of the projection apparatus and detects the installation state of the main body of the projection apparatus. Reference numeral 9 denotes an up / down / left / right reversing unit, so that when the upside down detecting unit 8 detects an inverted installation of the device, the up and down direction and the left and right direction of the projected image are reversed based on a signal from the up and down detecting unit 8. The liquid crystal panel 5 is inverted and each liquid crystal panel 5 is driven through the liquid crystal drive unit 10.

Next, the operation of the projection type projector apparatus according to the present invention will be described. The light from the light source 1 is reflected by the reflector 2, enters the color separation optical system 3 together with the direct light from the light source 1, and is separated into three color lights of R, G, and B by a total reflection mirror and a dichroic mirror, and the light of each color system is separated. The light is condensed by the condenser lens 4, and the liquid crystal panel 5 for each color is irradiated. The liquid crystal panel 5 is driven by the video signal for each color, modulates the light of each color from the condenser lens 4 into an image, and combines it into one image by the total reflection mirror and dichroic mirror of the color combining optical system 6, and the projection lens 7 To project on the screen.

The up-and-down detector 8 is constructed, for example, as shown in FIG. 2, and is attached to the main body of the projection apparatus. That is, a metal movable body 21 having an appropriate weight and a box body 22 for slidably accommodating the movable body 21 are provided, and a conductive contact piece 23 is provided on the lower end surface of the movable body 21 and a box body 22. Conductive contact piece 24 on the inner bottom surface of
Are provided, and the lead wire 25 is connected to the contact piece 23, and the lead wire 26 is connected to the contact piece 24. If the projector unit is installed normally (the base is on the floor), the movable unit 21
Is dropped on the bottom surface of the box body 22 by its own weight, the contact piece 23 and the contact piece 24 contact each other, the leader line 25 and the leader line 26 become conductive, and when the projector body is installed upside down, the movable body 21 Moves upward in the figure, and the contact pieces 23 and 24 are disconnected.

Alternatively, the up / down detector 8 may be constructed as shown in FIG. In this example, a movable body 31 made of a metal having an appropriate weight and having conductivity is housed in a box body 32 so as to be slidable up and down. Conductive contact pieces 33 are provided on both sides of the lower part of the box body 32, and when the movable body 31 falls, the movable body 31
Touch both sides of. The movable piece 31 is held by giving appropriate elasticity to the contact piece 33 so that the movable body 31 does not come out of the contact piece 33 upward even if the projection apparatus body vibrates a little. When is installed upside down, the movable body 31 can be pulled out from the contact piece 33. The lead lines 34 and 35 are connected to the contact pieces 33, respectively.

The vertical / horizontal inversion unit 9 switches the scan driver to inversion based on the signal from the vertical detection unit 8 indicating the conduction between the contact pieces, and vertically scans the liquid crystal panel (conceptual diagram) shown in FIG. The lines are vertically inverted, and at the same time, for example, the shift direction of the bidirectional shift register is switched to invert the horizontal scanning order of each scanning line. The liquid crystal drive unit 10 drives the three liquid crystal panels 5 based on the signals from the vertical / horizontal inversion unit 9. As a result, an image in a normal orientation is projected on the screen regardless of whether the projection apparatus body is installed upside down or in a normal state. It should be noted that the up / down detection unit 8 detects the sideways state of the projection apparatus main body, and at the same time, the up / down / left / right reversing unit 9 is used.
Alternatively, the scanning direction of the liquid crystal panel may be rotated by 90 degrees, and when the horizontal orientation of the projection apparatus main body is detected, an image rotated by 90 degrees by the liquid crystal panel may be generated.

[0012]

As described above, according to the projection type projector apparatus of the present invention, the installation state of the projection apparatus body is detected, and when the projection apparatus body is installed upside down, the drive circuit of the liquid crystal panel is switched. Since the generated image is inverted vertically and horizontally, it is not necessary to perform an up / down / horizontal inversion switching operation when the projection apparatus main body is installed upside down on the ceiling or the like.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part of an embodiment of a projection type projector apparatus according to the present invention.

FIG. 2 is a configuration diagram of a main part of an example of a vertical detection unit.

FIG. 3 is a main part configuration diagram of another example of the up / down detection unit.

FIG. 4 is a front sectional view showing a concept of a liquid crystal panel.

[Explanation of symbols]

 1 Light source 5 Liquid crystal panel 7 Projection lens 8 Vertical detection unit 9 Vertical / horizontal reversal unit 10 Liquid crystal drive unit 21 Movable body 22 Box body 23 Contact piece 24 Contact piece 31 Movable body 32 Box body 33 Contact piece

Claims (4)

[Claims] 1. A projection type projector device for projecting an image generated based on a video signal on a screen,
An up / down detection unit mounted on the main body of the projection device for detecting the installation state and an inversion unit for inverting the up / down and left / right of the image respectively are provided, and the projection image A projection type projector device that is vertically and horizontally reversed. 2. The box for accommodating the movable body, the movable body having a conductive contact piece at a lower end thereof and the conductive contact piece at an inner bottom surface of the movable body, the movable body being vertically slidable. 2. The projection type projector apparatus according to claim 1, wherein the installation state of the projection apparatus main body is detected by the conduction of the contact piece of the movable body and the contact piece of the box body. 3. The up-and-down detection unit is provided in a rectangular movable body made of a conductive material, a box body for accommodating the movable body up and down slidably, and both sides in the box body, and the movable body falls. 2. A contact piece that contacts both sides of the movable body and holds the movable body by means of which the installation state of the projection apparatus main body is detected by conduction between the contact pieces on both sides. The described projection type projector device. 4. The projection apparatus main body is composed of a liquid crystal projector, and the reversing unit is composed of a scan driver that inverts the scanning lines up and down, and a shift register that laterally inverts the scanning of each scanning line. The projection type projector device according to claim 1, claim 2, or claim 3.