Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/12—Picture reproducers
  • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
  • H04N9/3141—Constructional details thereof

Definitions

• the present invention relates to an image projection apparatus using a single picture tube.
• color image projection devices have been arranged with two or three picture tubes, so a control mechanism for controlling the picture tubes according to the projection distance and the like was required, and was large.
• a signal is output to an image projection device, for example, a VTR having a separate configuration is used. Therefore, when an image projection device is used, a VTR or the like is required, so that both have to be transported, and there is a problem that transportability and operability are poor.
• the present applicant firstly configured the picture tube of the image projection device with, for example, a beam index type color television picture tube, that is, a single picture tube, to improve the operability and downsizing of the image projection device.
• a device was proposed (Japanese Patent Laid-Open No. 55-98398, etc.).
• red, blue, and blue color phosphor stripes are repeatedly arranged at a predetermined pitch in the horizontal scanning direction, and a light absorber stripe is interposed between these color phosphor stripes.
• an index strip made of a phosphor or the like is provided at every other light absorber strip, for example. These are scanned with a single beam, and at the same time, the fluorescence of the index stripe is detected by a photo diode or the like, and the red, green, and blue video signals are obtained by multiplying the detection signal by two times.
• a so-called beam index type color picture tube has been proposed in which a scanning beam is modulated by a video signal that is sequentially switched to reproduce color.
• the size and weight of the device can be made extremely small and light as compared with the conventional two or three tubes, and a portable device can be formed.
• there is a single picture tube there is no need to make the optical axes of the lenses coincide with each other as in the past, and it is possible to perform projection onto the screen from an arbitrary distance.
• FIG. 1 is a schematic view showing the configuration of an image projection device of the present invention
• FIG. 2 is a perspective view showing one embodiment of this investigation
• FIG. 3 is a perspective view of a brick cover.
• FIG. 1 is a schematic diagram showing the configuration of the image projection device of the present invention.
• (1) is an image projection device, a surface image projection unit (2) composed of a single picture tube, and a cassette 25 arranged behind this image projection unit (2).
• (4) is the image presentation device (1)
• the image ⁇ section (2 U This lens system for projection of image light (21) a speaker (22), input-output ⁇ (23), a tuner (24), and electrostatic
• a source transformer (not shown) is provided.
• the input / output terminals (23) are provided with video input, audio input, microphone input, earphone output, and audio output.
• the image projection device (1) is composed of an image projection unit (2) using a single picture tube and a cassette VTR unit), so it becomes a compact unit and Performance and the need for wiring connections as in the past is eliminated.
• the control section (4) is also provided in one place, so that the operability is improved, and the control section ( 4 ) can be covered with one lid. Furthermore, since the image projection device (1) is small, it does not take up much space for installation.
• FIG. 2 is a perspective view showing one embodiment of the present invention, and the same parts as those in FIG. 1 are denoted by the same reference numerals.
• (6A) is a handle for transport provided on the upper surface of the image projector (1), and (6 mm) is provided diagonally before and after both sides of the image projector (1).
• the locking member for locking the metal fittings of the transport belt is a lens cover for protecting the lens system (21).
• (41) is a sequence of control units for controlling the image projection unit of the control unit (4)) and the tuner (24), and (42) is a sequence of control units for controlling the cassette VTR unit (3) of the control unit. It is. These are usually attached to the lid.
• (11) in Fig. 2 is a beam index type color picture tube, (12) its deflection yoke, and (13) is a photo diode. You.
• the image projection device (1) has a cassette VTR section and a control section (4) close to each other, so the cassette mounting, ejection, and control section (4) Operation can be performed in one place, improving operability. Also, the handle
• the locking device (6B) since the locking device (6B) is provided in consideration of the center of gravity of the plane image presentation device (1), handling during transport becomes easy. Furthermore, since the lens system (21) (FIG. 1) is covered with the lens cover), the lens system (21) is not damaged when handling the image projection device (1).
• FIG. 3 is a perspective view of a lens cover.
• (7) is a lens cover, and a groove (71) is provided inside the left and right side surfaces of the inclined lower portion of the lens cover (M). An engaging portion (73) corresponding to the shaft of (72) is engaged. Then, the lid (72) is fixed by suction of the magnet (74) provided on the lens cover C7) and the magnetic body (75) provided on the lid (72).
• the lens cover (7) configured as shown in FIG. 3 moves the lid (72) around the engaging portion (73) as indicated by the dotted line II, and then moves the lid (72) into the groove.
• the engaging portion (73) is guided by the groove (71), and the lid (72) can be stored in the lower part of the lens cover), and the lens system (21) is attached to the lens cover ( Exposed in front of?). Therefore, the lid (72) can be accommodated in the lens cover (7) without being removed, and the lid m is not lost.
• the cassette VTR unit (3) in the embodiment of FIG. 2 is mounted on a cassette, it may be either of a bottle type or a front loading type. If the cassette VTR (3) has a recording function, it can be recorded and projected by the image projection device aa).
• the image projection device ⁇ can be controlled by one remote control device. Therefore, this device can be freely carried from a place where a large number of people gather to a place, and can be set up very easily. It is most suitable as a so-called presentation device using videos such as seminars, conferences, various sales promotions, and Uchikenkai.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Video Image Reproduction Devices For Color Tv Systems (AREA)
• Projection Apparatus (AREA)
• Transforming Electric Information Into Light Information (AREA)
• Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=15308684

Family Applications (1)

Country Status (3)

Citations (4)

Family Cites Families (2)

• 1983
  • 1983-09-16 JP JP14215783U patent/JPS6050579U/ja active Granted
• 1984
  • 1984-09-14 GB GB08511454A patent/GB2157127B/en not_active Expired
  • 1984-09-14 WO PCT/JP1984/000446 patent/WO1985001409A1/ja unknown

Patent Citations (4)

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