JPH01230089A - Video tape recorder with monitor - Google Patents

Abstract

PURPOSE:To save electric power to be required for the lighting of a back light and to make it possible to observe the display of a monitor also from a lateral direction by arranging the back light for illuminating a translucent type liquid crystal display panel from the side of its rear face and arranging an attachably/ detachably reflecting plate opposed to the rear face of a monitor unit on the surface of a body so as to rotatably raise it. CONSTITUTION:A monitor unit 3 provided with the translucent type liquid crystal display panel 7 and the back light 8 for radiating the panel 7 from the side of the rear face side is stored in a case 4 having a display window 5 and a natural lighting window 6 on its front and rear faces. The base end of the monitor unit 3 is pivoted on a VTR body so as to be rotatably raised and the reflecting plate 12 opposed to the rear face of the monitor unit 3 is arranged on the VTR body 1 so as to rotatably raised and attached/detached to/from the monitor unit 3. Consequently, external light is utilized in a bright position, power required for the lighting of the back light can be saved and the display of the monitor can be observed also from the lateral direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a video cheapre with a monitor, Korg.

[Conventional technology]

Conventionally, video tape recorders (hereinafter abbreviated as VTR)
As a VTR with a monitor integrated into the VT
There is a VTR with a monitor that integrates a CRT television receiver and a CRT television receiver, but since this VTR with a monitor uses a CRT television receiver as a monitor, it is necessary to take measures against the heat generated by the monitor. Therefore, there was a problem that miniaturization was difficult.

For this reason, recently it has been proposed that a monitor using a liquid crystal display panel is provided on the surface of a cassette mounting opening/closing lid provided in a tape cassette mounting section of a VTR.

VTRs with monitors that use this LCD monitor do not need to take heat measures like those that use cathode ray tube television receivers, and LCD monitors are small, so
It has the advantage that the entire VTR with a monitor can be made into a shed, and that the monitor drive power can be reduced.

[Problem to be solved by the invention]

However, V with a monitor that uses a conventional LCD monitor
Since the TR has an LCD monitor fixed to the surface of the opening/closing lid for attaching the cassette of the VTR, the surface of the monitor is connected to the VT.
It had the disadvantage that it could only be seen from the top side of the R. This is because the VTR is used with the cassette mounting lid closed, and when the cassette mounting lid is closed, the display screen of the LCD monitor fixed to the surface of the cassette mounting lid Since the VTR faces upward, the display on the monitor can only be viewed from the top side of the VTR.

Furthermore, in the above-mentioned conventional VTR with a monitor, the LCD monitor must be used to display images with a backlight turned on at all times, so there is the problem that it is not possible to save the power required to turn on the backlight. Good friend.

In other words, as is well known, there are two types of liquid crystal display panels: reflective type and transmissive type, but a reflective type liquid crystal display panel emits extraneous light that enters through the liquid crystal display panel and is reflected on the back surface of the display panel. Since the light is reflected by a reflector to illuminate the LCD panel, there is a large loss of light, which makes the screen very dark on the dot matrix type LCD display/4' panel that displays television images. Therefore, in a liquid crystal television receiver that displays 17 television images, a transparent liquid crystal display panel is used to illuminate the transparent liquid crystal display/4' panel from the back side thereof.

There are two methods for illuminating the liquid crystal display panel: a backlight is provided on the back side of the liquid crystal display panel, and the lighting of this backlight illuminates the liquid crystal display panel; There is a method that uses external light to illuminate the LCD display panel, but those that use a backlight have the problem of consuming more power because the backlight must be turned on at all times during use. However, devices that use external light have the problem that they cannot be used in places where sufficiently bright external light cannot be obtained.

For this reason, the amount of transmission liquid crystal display/mother panel? The LCD TV receiver used uses external light for display in bright locations where there is sufficient brightness of external light, and turns on the backlight in dark locations where sufficient external light is not available. According to this method, the LCD television receiver can be used in both bright and dark places, and there is no need to turn on the backlight in bright places. Therefore, the power required for lighting the backlight can be reduced accordingly.

However, as mentioned above, the conventional VT with a monitor has an LCD monitor fixed on the surface of the opening/closing lid for attaching the cassette of the VTR.
In R, since the VTR is used with the cassette loading lid closed, it is possible to adopt a method of illuminating the liquid crystal display panel by taking in outside light from the back side of the liquid crystal display panel. Since there is no choice but to adopt an illumination method using only a backlight, it is impossible to reduce the power required for lighting VC of the backlight by also using a method using external light.

This invention was made in view of the above-mentioned circumstances, and its purpose is to enable a liquid crystal monitor to perform display using external light and display by lighting a backlight. This reduces the power required to turn on the backlight, and also reduces the monitor display to VT.
To provide a video tape recorder with a monitor which can be viewed not only from the top side but also from the side.

[Means to solve the problem]

The present invention provides a monitor unit truck that includes a VTR body, a transmission amount liquid crystal display panel, and a leak light for illuminating the liquid crystal display panel from the side of the back side, inside a case having a display window and a lighting window on the front and back sides. The monitor unit is rotatably mounted on the video tape recorder main body with its proximal end supported by the VTR main body, and
A reflective plate facing the back surface of the monitor unit is provided on the TR main body so as to be rotatable up and down, and the reflective plate is detachable from the monitor unit.

[Effect]

According to this invention, if only the monitor unit is stood up diagonally with the reflector lying down on the top surface of the VTR main body, external light is reflected by the reflector toward the back surface of the liquid crystal display panel. Therefore, in bright places, the LCD panel can be illuminated using external light, and if the backlight is turned on with a reflector in contact with the back of the LCD/4 panel, the backlight can be illuminated. Since the illumination light is reflected by the reflector toward the back surface of the liquid crystal display/arm panel, the liquid crystal display panel can be illuminated by the backlight in a dark place. Further, according to the present invention, since the monitor unit and the reflector are provided so as to be rotatable up and down as described above, the display on the monitor can be adjusted by laying down or standing up the entire monitor unit on the top surface of the VTR main body. i
It can be seen not only from the top side of the VTH but also from the side.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

First, to explain the overall configuration of the VTR with monitor, the third
In Figures 1 to 5, 1 is an 8 mm IJ VTR body that uses magnetic tape with a tape width of 8 mm;
The R main body 1 has a tape cassette loading section from the approximate center to the front end thereof, and a recording/reproducing section at the rear end thereof. Reference numeral 2 denotes an opening/closing lid for mounting a cassette provided on the upper surface of the front end side of the VTR body 1. A tape cassette is mounted on the tape cassette mounting section by opening the opening/closing lid 2. The VTR main body 1 basically has the same structure as a commercially available 8 mm IJ VTR, so a description thereof will be omitted.

Reference numeral 3 denotes a monitor unit provided on the upper surface of the rear end side of the VTR main body 1, and the monitor unit 3 has the following configuration.

That is, in FIG. 1, 4 is a case of the monitor unit 3, and this monitor unit case 4 consists of a front side case 4a and a back side case 4b. A display window 5 is opened, and a lighting window 6 is opened on the lower surface facing the display window 5. Transparent plates (for example, glass plates) 5h and 6* are fitted into the display window 5 and the lighting window 6, respectively.

Further, in FIG. 1, reference numeral 7 denotes a dot-matrix type transmission liquid crystal display panel provided in the monitor unit case 1 facing the display window 5, and 8 denotes this liquid crystal display panel 7.
The backlight 8 is a backlight that illuminates the back side from the side, and this backlight 8 is made of a straight tube fluorescent lamp. This backlight 8 is arranged on the back side of the liquid crystal display panel 7 along one side edge of the liquid crystal display panel 7.

Reference numeral 9 denotes a light guide plate made of a transparent plate such as acrylic resin and provided inside the monitor unit case 3 so as to face the back surface of the liquid crystal display panel 7. The light guide plate 9 has an area slightly larger than the area of the liquid crystal display panel 7, and the backlight 8 is provided in close contact with one end side of the light guide plate &9.

The light guide plate 9 has a flat surface facing the liquid crystal display panel 7, and a curved back surface that slopes from the backlight 8 side to the opposite side toward the light guide plate surface side. Also,
A backlight 8 is provided on the entire surface of the back surface of the light guide plate 9.
A large number of fine grooves (not shown) parallel to the axial direction are formed at close intervals.

Although not shown, inside the monitor unit case 4,
A circuit board that constitutes a liquid crystal display panel drive circuit and a backlight lighting circuit is provided, and the liquid crystal display panel 7 and backlight 8 are connected to this circuit board. Also,
As shown in FIG. 4, a blind volume adjustment knob 10 for adjusting the brightness of the screen displayed by the liquid crystal display channel 7 and a backlight lighting switch J1 are provided on the side surface of the monitor unit 3. It is being

This monitor unit 3 has its base end connected to the VTR main body 1.
It is pivotably mounted on the VTR main body 1 so as to be rotatable up and down.

Further, in FIG. 1, reference numeral 12 denotes a reflector that is rotatably provided on the top K of the VTR main body 1 and facing the back surface of the monitor unit 3. They are said to have approximately the same area.

The reflector 12 is rotated about the center of rotation of the monitor unit 30, and the reflector 12 and monitor unit 3 are pivotally supported on the VTR main body 1 in the following manner.

In Figures 6 and 7, 13.13 is VTRTR
A pair of left and right pivot members sb are attached to the top surface of the main body and pivotally support the base end of the monitor unit 3 and the base end of the reflector plate 12 so as to be rotatable up and down. It is installed on both sides of the central part of the VTR body 1 and is fixed from inside the VTR main body 1 with setscrews 14 and 14. This pivot member 13
．． 13 is a hollow box-shaped member, and this pivot member 13.13
Support shafts 15, 15 are provided horizontally protruding from the mutually opposing surfaces of each.

On the other hand, the monitor unit case 4 is provided with shaft holes 16, 16 which rotatably fit into the support shaft 15.15 on both side surfaces K of the base end thereof, and the monitor unit 3
The shaft holes 16, 16 are fitted into the support shaft 15.15, and the support shaft 15.15 is pivotally supported on the support shaft 15.J5 so as to be rotatable up and down.

Also, on both sides of the base end of the reflector &12, there is a pair of rising pieces 12a that enter between the pivot member 13.13 and the monitor unit 3 (D) on both sides of the base end.

12a is provided. This rising piece 12a.

12h is provided with shaft holes 17, 17 which rotatably fit into the support shafts J 5, 15, and the reflecting plate 12 is provided with shaft holes 17, 17 which are rotatably fitted into the support shafts J 5, 15. Let me,
It is pivotably supported on this support shaft 15.15 so as to be rotatable up and down.

The monitor unit 3 and the reflector 12 are connected to the shaft hole 17 of the reflector 12 in the support shaft 15.15 of the pivot member 13.13.
17, and then the shaft holes 16, 16 of the monitor are fitted to this support shaft 15.15, and then the pivot support member 13.13 is fitted.
By fixing the K to the VTR body 1 with screws, the VTR
It is attached to the main body 1.

Note that 18.18 is an E IJ ring fitted into the end of the support shaft 15.15. This E IJ song 8.
18 is carried out with the monitor unit case 4 divided into a front case 41L and a back case 4b.

In addition, a pair of pivot members 13 installed on the VTR main body 1
．． One of the pivot members 13 has wiring holes 19h and 19b formed in its bottom and top surfaces, and the wiring holes 19h and 19b are also formed in the top surface of the VTR main body 1 and the monitor unit case 4. Corresponding wiring holes 20.21 are provided. 22 is a monitor unit 3 that monitors image signals read from the magnetic tape in the recording and reproducing section in the VTR main body 1.
This is the wiring that is sent to the LCD panel drive circuit.

Further, in FIG. 6, reference numeral 23.23 denotes a monitor unit locking mechanism that locks the monitor unit 3 in a state where it is laid down on the top surface of the VTR main body 1 and in a state where it is raised.

As shown in FIGS. 8 and 9, this locking mechanism 23.23 is attached to the side surface of the monitor unit case 4 by the support shaft 1.
The lock pin 25 is slidably inserted into the through hole 24 provided upward from the position 5, and the lock pin 25 is fixed to the inner surface of the monitor unit case 4 with a screw 26 at its proximal end to monitor the lock pin 25. The tip of the lock pin 25 is brought into elastic contact with the support shaft protruding surface of the pivot member 13 by the spring force of the plate spring 27. In addition, on the support shaft protruding surface of the pivot support member 13,
Conical lock-bin fitting recesses 28a, 28b, and 28c are provided at three locations along the rotation locus of the lock pin 25 as the monitor unit 3 rotates up and down,
The first lock bin fitting recess 28a is provided at a position corresponding to the lock pin 25 when the monitor unit 3 i VTR main body 1 is laid down on the top surface.

Therefore, when the monitor unit 3 is laid down on the upper surface of the VTR main body 1, the lock pin 25 which is in elastic contact with the support shaft protruding surface of the pivot support member 13 is fitted into the first lock bin fitting recess 28a. The monitor unit 3 is locked in the laid down state. In addition, the lock of this monitor unit 3,
It is automatically released by rotating the monitor unit 3 with a certain amount of force, and when the monitor unit 3 is rotated with a certain amount of force, the tip of the lock bin 25 locks into a conical shape. The plate spring 27 is pushed back along the slope of the pin fitting recess and is removed from the lock bin fitting recess.

Further, the second lock bin fitting recess 28b and the third lock bin fitting recess 28c are located at a position corresponding to the lock bin 25 when the monitor unit 3 is pulled up to a certain predetermined angle, and a position corresponding to the lock bin 25 when the monitor unit 3 is raised to a certain predetermined angle. The monitor unit 3 is provided at a position corresponding to the lock bin 25 when the monitor unit 3 is lifted up, so that the monitor unit 3 is locked at two different lifting angles.

Incidentally, the upright piece 12a of the reflection plate 12 is provided with an elongated hole 29, which serves as an escape from the lock bin 25, along the rotation locus of the lock bin 25.

On the other hand, at the center of the front end surface of the monitor unit case 4, a reflector hooking recess 30 as shown in FIG. ,
An elastic latching claw 3 is provided which is removably fitted into the reflection plate latching recess 30. Then, the reflector 12 connects the elastic hook 31 to the reflector hook recess 3 of the monitor unit 3.
0, it is latched to the monitor unit 3 in such a manner that it is in contact with the back surface of the monitor unit 3.

In this state, the reflection plate 12 is rotated up and down together with the monitor unit 3.

Next, to explain how to use the monitor in the VTR with a monitor configured as described above, when using the monitor in a dark place where sufficient brightness of outside light cannot be obtained, attach the reflector 12 to the back of the monitor unit 3. The i4 light 8 is turned on to use the monitor in this state. In this case, the backlight 8 is
The illumination light that enters the light guide plate 9 from the backlight 8 spreads over the entire area inside the light guide plate 9 and is emitted from the fine grooves formed by dense islands on the entire back surface of the light guide plate. Since it is radiated to the entire area of the 12 surfaces of the reflector,
The illumination light from the 74-channel light 8 is reflected over the entire area of the 12 surfaces of the reflecting plate 12, and the entire area of the liquid crystal display panel 7 is illuminated by the light guide plate 9.
Can be illuminated evenly through the light.

In this case, the screen may be viewed from the top side of the VTR by placing the monitor unit 3 face down on the top surface of the VTR main body 1 as shown in FIG. If you stand it up diagonally as shown in the figure, you can view the screen from the side (from the front of the VTR).

Therefore, according to this VTR with a monitor, the display on the monitor can be viewed not only from the top side of the VTR but also from the side if necessary.

In addition, when using the monitor in a bright place where sufficient brightness of external light can be obtained, remove the elastic hook 31 of the reflector 12 from the reflector hook recess 30 of the monitor unit 3 with your fingertips and remove the reflector 12 from the reflector hook recess 30 of the monitor unit 3. is removed from monitor unit 3, and the 11th
As shown in the figure, the reflector 12 is kept lying down on the top surface of the VTR main body 1, and only the monitor unit 3 is stood up diagonally. If only the monitor unit 3 is stood up diagonally in this way, the monitor unit 3 will be in a state diagonally opposed to the reflector 12 which is laid down on the top surface of the VTR main body 1, so that the light will not be incident on the surface of the reflector 12. This reflective plate 1
2, the external light can be reflected toward the monitor unit 3Vc to illuminate the liquid crystal display panel 7 from the back side thereof.

Therefore, in this case, there is no need to turn on the backlight 8, and the power required to turn on the backlight 8 can be reduced accordingly.

Note that in the above embodiment, the monitor unit 3 and the reflector 12
are supported on the same support shaft 15.15, but the monitor unit 3 and the reflector 12 may be pivoted separately, and the mechanism for attaching and detaching the reflector 120 to and from the monitor unit 3 may also be implemented as described above. This is not limited to examples.

〔Effect of the invention〕

According to this invention, it is possible to cause the liquid crystal motor to perform display using external light and display by lighting the backlight, so in a bright place, the liquid crystal display panel is illuminated using external light and the backlight is turned off. The power required for lighting can be saved, and since the monitor unit and reflector can be rotated up and down, the display on the monitor can be viewed not only from the top side of the VTR but also from the side. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an enlarged cross-sectional view taken along line B-B in FIG. 3, and FIG.
Figure 3, Figure 4 and Figure 5 are a plan view, front view and side view showing the external appearance of the videotape recorder with monitor, Figure 6 is an enlarged view taken along line C-C of Figure 4. cross section,
Figure 7 is D-DP of Figure 6! 8 is a sectional view taken along line A in FIG. 6, FIG. 9 is a sectional view taken along line E-F in FIG.
10 and 11 are front views of the VTR with a monitor, showing how the monitor is used. 1...VTR body, 3...Monitor unit, 4...
・Case, 5...Display window, 6...Lighting window, 7...
Liquid crystal display panel, 8... Backlight, 12... Reflector, 13... Pivotal support member, 15... Support shaft, 30...
・Reflector plate latching recess, 3 pieces...Elastic latching claw. Figure 1 Figure 2 Figure 3 Figure 5 Figure 8 Figure 9

Claims (1)

[Claims] It comprises a video tape recorder main body, and a monitor unit provided with a transmission amount liquid crystal display panel and a backlight that illuminates the liquid crystal display panel from the side of the back side in a case having a display window and a lighting window on the front and back sides, The monitor unit has a base end pivotably supported on the video tape recorder main body so as to be rotatable up and down on the video tape recorder main body, and is arranged on the video tape recorder main body to face a back surface of the monitor unit. A videotape recorder with a monitor, characterized in that a reflector is provided so as to be rotatable up and down, and the reflector is detachable from the monitor unit.