JP2010114476A - Video camera apparatus - Google Patents

Abstract

[PROBLEMS] To use a viewfinder liquid crystal display device in order to allow a large number of people to simultaneously view video information recorded on a video camera device at an arbitrary location, and therefore it is necessary to increase the size of the light source and increase the amount of light. It was.
A video camera device (1) includes a means for attaching / detaching a projection lens device (6) to / from a housing of a direct-view liquid crystal monitor unit (3) and a detection device (16) capable of detecting the attachment / detachment state. When the projection lens device 6 is mounted on the direct-viewing liquid crystal monitor unit 3 and the recording / playback changeover switch 5 of the video camera device 1 is switched to the playback mode, the video camera device is rotated. The user determines that he / she intends to use the video camera device as a projector, and switches the scanning direction of the liquid crystal display device 7, the RGB pixel shift amount, and the backlight light amount from normal shooting or normal playback to projector use.
[Selection] Figure 1

Description

  The present invention relates to a digital video camera that is used as a simple projector that enlarges and projects information recorded on a video camera device main body displayed on a liquid crystal display device mounted on the video camera device, and an imaging device for the digital still camera. It is about.

  Conventionally, many proposals have been made that use a liquid crystal display device of a video camera device as a projection image of a projector device. As the liquid crystal display device for viewfinder, (for example, refer to Patent Documents 1 and 2), a low brightness (standard) light source unit is displayed in the EVF mode, and a high brightness light source unit and a fan unit are displayed in the projector mode. The eyepiece part of the viewfinder of the video camera device can be removed from the viewfinder part of the video camera device, and the projection lens device is built in instead of this eyepiece lens part and enlarged by the projection lens. There is a system in which a projector adapter including a projector screen for forming an image of the liquid crystal display device is detachably mounted.

Alternatively, as a device that uses a direct-view liquid crystal display device mounted on a video camera device (see, for example, Patent Document 3), a liquid crystal display of a direct-view liquid crystal monitor unit is connected to a projector adapter that is an adapter device of a video camera device with a direct-view liquid crystal monitor. An image is displayed on the liquid crystal display device by providing an insertion hole for inserting the device, separating the liquid crystal display device of the direct-view liquid crystal monitor unit from the backlight and inserting it into the direct-view liquid crystal display device insertion hole of the projector adapter Can be enlarged and projected onto a screen.
JP 05-344392 A JP 05-328179 A Japanese Patent Laid-Open No. 08-307745

  However, in the conventional method using the liquid crystal display device for the viewfinder of the video camera device, the transmittance of the liquid crystal display device is only about 3%, so that even when an external light source is attached, the output is high. A light source was required, and there were problems of increased power consumption and increased heat generation of the video camera body.

  In addition, when configured with a built-in light source, the shape of the liquid crystal display device for viewfinder is small, so many light sources are placed behind the liquid crystal display device, making it impossible to increase the amount of light, and there is a problem of insufficient light amount It was.

  Furthermore, in the system in which the liquid crystal display device of the direct-view liquid crystal monitor unit of the video camera is separated from the backlight and inserted into the direct-view liquid crystal display device insertion hole of the projector adapter, a rotating unit is required to separate the backlight from the backlight. In order to use it separately from the light, a protection means for the display device is required, and there is a problem that the shape of the direct-view liquid crystal monitor unit is increased.

  The present invention solves the above-described conventional problems, and includes a means for attaching a projection lens device to a housing of a direct-view liquid crystal monitor unit, thereby simplifying the projector function with excellent portability while suppressing an increase in power consumption. An object of the present invention is to provide a video camera device to which is added.

  In order to solve the above-described conventional problems, the video camera device of the present invention includes a liquid crystal monitor unit that illuminates a liquid crystal display device with a backlight and can directly view an image of the liquid crystal display device, and a projection lens mechanism in the direct view liquid crystal monitor unit The projector mode and the normal recording / reproducing mode are discriminated based on the open / close rotation position detection signal, the projection lens mounting detection signal, and the recording / reproducing mode detection signal of the direct-view liquid crystal monitor unit. A projector function for switching the scanning direction, the RGB pixel shift amount, and the luminance of the backlight and expanding and projecting the video signal recorded in the video camera apparatus main body to the outside can be added.

  Further, the present invention, in a video camera device provided with a direct-view liquid crystal monitor unit, provided with a projecting means for adding a projector function for expanding and projecting the video signal recorded in the video camera device body to the direct-view liquid crystal monitor unit, In the projector mode, the brightness of the projection environment is determined based on the video captured around the projection screen from the imaging means of the video camera device, and the brightness of the backlight is controlled.

  The video camera device according to the present invention allows the projection lens device to be attached by adding means for detaching the projection lens device to the direct-view liquid crystal monitor unit, so that a large number of people can easily attach the projection lens device at any place. It is possible to add a projector function that enables the information recorded in the apparatus to be magnified and viewed.

  Embodiments of a video camera device according to the present invention will be described below in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view showing an appearance of a video camera device when a projection lens device 6 is attached to the direct-view liquid crystal monitor unit 3 according to Embodiment 1 of the present invention. In FIG. 1, a photographing lens 2 is disposed at the front of the video camera device body 1 and a direct-view liquid crystal monitor unit 3 is disposed on the side through an opening / closing rotation mechanism 4, and an image is confirmed on the liquid crystal display device of the direct-view liquid crystal monitor unit 3. The information recorded on the recording medium of the video camera main body 1 can be reproduced and confirmed on the liquid crystal display device. Reference numeral 5 denotes a recording / playback mode switch of the video camera apparatus main body.

  FIG. 2 is an explanatory diagram showing the internal configuration of the direct-view liquid crystal monitor unit 3 and the projection lens device 6 in a state where the projection lens device for projector according to the first embodiment of the present invention is mounted on the direct-view liquid crystal monitor unit. The device 8 is an edge light composed of a plurality of white LEDs provided on the side of the liquid crystal display device 7, and 9 is provided at the rear of the liquid crystal display device 7 to guide the light of the edge light 8 to the liquid crystal display device 7 side. The light plate 10 is disposed between the liquid crystal display device 7 and the light guide plate 9 and diffuses the light from the light guide plate 9, 11 and 12 are prism sheets, and 13 is a light guide that forms the reflection surface of the light guide plate 9. A reflection sheet for an optical plate, 14 is rotatably connected to the video camera apparatus main body 1 and houses various parts constituting a direct-view liquid crystal monitor unit, and 15 is a printed circuit board on which white LEDs 8 that are edge lights are mounted. 17 the projector projection lens, 16 is a mounting detecting switch to the direct-view liquid crystal monitor unit 3 of the projection lens 6. A guide groove 18 for mounting the projection lens device is formed above and below the housing 14 of the direct-view liquid crystal monitor unit, and a guide convex portion 19 is formed on the housing of the projection lens device 6. The mounting detection switch 16 is disposed in a guide groove 18 provided in the direct-view liquid crystal monitor housing to prevent malfunction. Although the mounting guide grooves and the guide projections of the projection lens device 6 for projectors are shown in FIG. 2, they are not limited to this shape. In FIG. 2, the prism sheet is composed of two prism sheets by the upper prism system, but the prism sheet can be realized by a structure of one sheet by the lower prism system.

  The direct-view liquid crystal monitor unit of the video camera device 1 is used for allowing a video camera device user to view an image on a larger screen, rather than the direct-view liquid crystal display of the video camera device, so that a plurality of people can simultaneously view the same image at an arbitrary place. 3 is used as a projector, the direct-view liquid crystal monitor unit 3 is rotated 180 degrees from the position at the time of normal photographing, and the projection lens device 6 is directed to the screen or wall desired to be projected, and the projection lens device 6 is guided to the guide groove 18 of the direct-view liquid crystal monitor unit 3 , The detection switch 16 is turned on, and the recording / reproduction switching switch 5 is set to the reproduction mode, that is, the direct-viewing liquid crystal monitor opening / closing switch in the opening / closing rotation mechanism 4 and the direct-viewing liquid crystal monitoring unit in the opening / closing rotation mechanism 4 as well. When the rotation switch, projection lens device mounting switch 16, and playback mode switch 5 are all turned on, the video camera The control microcomputer of the apparatus 1 determines that the projector mode is selected, and switches the light amount of the backlight of the direct-view liquid crystal monitor unit 3 from the setting in the normal photographing / reproducing mode to the high light amount setting set in the projector, screen, wall, etc. You can enjoy the magnified projection. This can also be realized by adding a projector playback mode to the recording / playback mode switching switch 5 instead of the projection lens device mounting detection switch 16.

  Further, the scanning directions of the liquid crystal display device 7 are the liquid crystal display device 7 in the face-to-face shooting mode rotated 180 degrees from the state in which the subject is confirmed on the liquid crystal display device 7 of the direct-view liquid crystal monitor unit 3 in the shooting mode. In the display, only the upper and lower scanning directions are reversed, and the screen of the liquid crystal display device 7 is mirrored. However, when the projector mode is determined, the upper and lower scanning directions remain unchanged and only the left and right scanning are switched. The projection screen is normally scanned. Further, when the liquid crystal display device 7 sequentially writes video signal charges on the RGB signal lines connected to the respective liquid crystal pixels to display an image, a set of three signal lines connected to the respective RGB pixels are simultaneously accessed in a lump. In the case of an RGB simultaneous sampling driving type liquid crystal display device, RGB pixels are arranged at a predetermined pitch interval as shown in FIG. For this reason, when the input RGB signals are simultaneously supplied to a set of RGB pixels without any phase adjustment, a phase error occurs and the resolution decreases. In the RGB simultaneous sampling driving method, the RGB signal is time-shifted in order to suppress this decrease in resolution. When the direct-view liquid crystal monitor unit 3 of the video camera device 1 is switched from the normal shooting mode to the projector mode, the switching of the RGB signal time shift processing to the liquid crystal display device 7 is performed by switching the backlight light amount, switching the scanning direction, and the like. Combined to suppress resolution degradation.

(Embodiment 2)
FIG. 4 is a diagram when a reproduction screen of information recorded in the video camera device main body is displayed on the direct-view liquid crystal display device 7 according to Embodiment 2 of the present invention, and the screen is enlarged and projected. When the image is magnified and projected on the screen or wall as shown in FIG. 4, the zoom of the photographing lens is forcibly controlled to the wide angle side according to a command from the control microcomputer, and the information outside the projection screen and the surrounding projection screen is the video camera device. The light is condensed by one image pickup lens 2 to form an image on an image pickup device. This forcible control of the zoom to the wide-angle side is because, when the photographing lens is positioned on the telephoto side in the projector mode, only the information at the center of the projection screen is imaged on the photographing element. A signal corresponding to the image formed by the imaging device is output to the camera signal processing unit, and the camera signal processing unit converts the video signal for each field from the imaging device into a plurality of blocks, for example, a1 to f8 as shown in FIG. The data is divided and the signal data of each block is output to the control microcomputer. In the microcomputer, the brightness of the projection environment is determined based on the brightness information outside the projection screen and the brightness information from a1 to a8.

  Generally, the closer to the floor or the ground, the darker the brightness measurement point is at the top of the screen. In addition, the brightness is determined only by information outside the projection screen. However, immediately after the start of projection, it is not a reproduction screen, but is switched to a white fade signal by a command from the control microcomputer, and a1 to a8 outside the projection screen and the projection screen You may determine by the ratio with c3-c6. As an example of the brightness criterion, the ambient illuminance of 5 Lux is set as a standard environment in the projector mode, and the power consumption of the backlight is set to 1 W at this standard illuminance, and in the case of an almost dark environment of 1 Lux or less, If the power consumption is controlled to be 2 W in an environment of 0.5 W, 10 Lux or more, and a bright ambient environment in the projector mode, an optimal projection environment for the viewer can be provided.

  As soon as the illuminance measurement in the projection environment and the backlight light quantity setting control are completed, the camera system circuit block shifts to the power save mode, and the power consumption reduction and the heat generation amount of the video camera apparatus main body can be suppressed.

  The video camera device according to the present invention adds a projector function by mounting a projection lens device on a direct-viewing liquid crystal monitor, and can be used for presentations in a conference room or the like without a large monitor.

The perspective view which shows the external appearance of the video camera apparatus which mounted | wore with the projection lens apparatus of embodiment of this invention Explanatory drawing which shows the internal structure of the liquid crystal monitor part and projection lens apparatus in 1st Embodiment of this invention. Explanatory drawing which shows the pixel arrangement | sequence of the liquid crystal display device in 1st Embodiment of this invention. Explanatory drawing which shows the imaging state of the projection screen in 2nd Embodiment of this invention. Explanatory drawing which shows the division | segmentation of the image pick-up element output in 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Video camera apparatus main body 2 Imaging lens 3 Direct view liquid crystal monitor part 4 Opening and closing rotation mechanism 5 Recording / reproducing mode change switch 6 Projection lens apparatus 7 Liquid crystal display device 8 LED
DESCRIPTION OF SYMBOLS 9 Light guide plate 10 Diffusion sheet | seat 11, 12 Prism sheet | seat 13 Reflection sheet | seat 14 Direct view liquid crystal monitor part housing | casing 15 Printed circuit board 16 Mounting detection switch 17 Projection lens 18 Guide groove 19 Guide convex part

Claims (2)

In a video camera apparatus having a liquid crystal monitor unit that illuminates the liquid crystal display device with a backlight and can directly view an image of the liquid crystal display device, the direct-view liquid crystal monitor includes means capable of attaching a projection lens mechanism to the direct-view liquid crystal monitor unit. The projector mode and the normal recording / reproducing mode are discriminated based on the opening / closing rotational position detection signal, the projection lens mounting detection signal, and the recording / reproducing mode detection signal, and the scanning direction of the liquid crystal display device, the RGB pixel shift amount, and the backlight A video camera device characterized in that it can add a projector function for switching the luminance and enlarging and projecting a video signal recorded in the video camera device main body to the outside. In the video camera device including the direct-view liquid crystal monitor unit, the direct-view liquid crystal monitor unit includes a projecting unit for adding a projector function for projecting the video signal recorded in the video camera device body to the outside, and in the projector mode, A video camera device characterized in that the brightness of a projection environment is determined based on an image captured around the projection screen from an imaging means of the video camera device, and the luminance of the backlight is controlled.

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