JPH02165785A - Liquid crystal television receiver - Google Patents

Abstract

PURPOSE:To adjust a display part into the optimum angle at a viewing position even when the installed position of a liquid crystal television receiver and the viewing position are remote and to compensate for the defect of a liquid crystal element having a narrow effective visual angle by making the display part rotatable at an arbitrary angle by a remote controller. CONSTITUTION:When the tilt UP key of a remote control transmitter 4 is depressed, a drive motor 101 rotates, and a display part 2 rotates at a low speed. Further, when the pressing of the tilt UP key is released at a point where the angle of the display part 2 is made into the optimum angle, the rotation of the drive motor 101 stops, and the rotation of the display part 2 also stops according to the stopping of the rotation of the driving motor 101. On the other hand, when the rotation of the display part 2 is obstructed by external force during the rotation of the drive motor 101, while the rotation of a first flat gear 106 stops, a worm gear 104 can rotate because of the generation of slip by a slipping mechanism. Consequently, an excess load is never applied to the drive motor 101. Thus, even when the viewing position is remote from the receiver, the display part can be adjusted into the optimum angle.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a liquid crystal television receiver in which a display portion is rotatable with respect to a main body.

(b) Conventional technology: LCD television receivers have the advantage of being smaller and lighter than general television receivers using cathode ray tubes, and consume less power. It is widely adopted.

However, while the liquid crystal elements used in liquid crystal television receivers have the above-mentioned advantages over cathode ray tubes, they have the disadvantage of a narrow effective viewing angle.

For this reason, conventional LCD television receivers
As shown in Publication No. 42783 (HO4N5/64), the display section is rotatably attached to the main body, and can be semi-fixed at any rotation angle. With this configuration, the user can manually adjust the display section to an optimal angle, and the above-mentioned drawbacks can be overcome.

(c) Problems to be solved by the invention However, when viewing a liquid crystal television receiver with a large screen (for example, 14 inches or more), if the installation position of the receiver is far from the viewing position, It was difficult and inconvenient to adjust the display section to the optimum angle.

The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide a liquid crystal television receiver in which the display section can be adjusted to an optimal angle even if the viewing position is far from the receiver.

(d) Means for Solving the Problems The present invention comprises a liquid crystal television receiver body, a display unit rotatably attached to the body and equipped with a liquid crystal panel, and a display unit that is rotatably driven. and a remote control device that controls the drive unit.

Further, the drive section includes a drive motor and a deceleration means, and the rotation of the drive motor is transmitted to the display section via the deceleration means.

Further, the speed reduction means includes a slip mechanism.

(e) Operation The rotation angle of the display section of the present invention can be arbitrarily varied by commands from a remote control device.

Furthermore, the rotation of the drive motor is transmitted to the rotating shaft of the display unit via the deceleration means, and the display unit rotates at a low speed.

Furthermore, when the display section is rotationally driven, even if its rotation is prevented by an external force, the slip mechanism operates so that no unreasonable force is applied to the drive motor, and when the drive motor is stopped, the angle of the display section can be adjusted manually. can be varied.

(f) Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view of a liquid crystal television receiver in this embodiment, and FIG. 2 is a sectional view of the same side.

In the figure, (1) is the main body of the liquid crystal television receiver, which includes a drive unit (10) that rotationally drives a display unit (described later), a printed circuit board (11) on which a tuner (not shown) and other circuit components are mounted. ), channel UP/DOWN and volume UP/DO
A plurality of operation keys such as WN (12) (12)..., a plurality of switches (13) operated by the plurality of operation keys
(13)..., a power switch (14), a light receiving window (15) that receives an infrared remote control signal from a remote control transmitter (described later), and a lower case (16) that houses these.

(2) is a display unit which is rotatably supported by the main body (1) by a rotating shaft (3), and includes an active matrix type liquid crystal display panel (20), which is arranged on the back side of this liquid crystal display panel; Backlight that allows flat fluorescent lamps (
21) and an upper case (22) for storing them.

(4) is a remote control transmitter that remotely controls the operation of the liquid crystal television receiver, and in addition to the operation keys having the same function as the operation keys of the main body (1), the display section (2)
Tilt UP/DOWN operation keys are provided to control the rotation angle.

Next, details of the drive section (10) will be explained according to FIGS. 3 to 5. In the figure, (100) is a metal board installed in the lower case (16), and (101) is this board (10).
0) A drive motor placed above, (102) is an ohm attached to the rotating shaft of this drive motor (101). (103) is a first support shaft installed on the substrate (100), which includes a ohm wheel (104) that meshes with the ohm wheel (102);
4) and a first spur gear (106) and a boss (107) which are frictionally coupled to each other via a felt washer (105). (108) is the ohm wheel (10
4) is a compression spring inserted between the two ohm wheel (104) and the boss (107) to press the two ohm wheel (106) toward the first spur gear (106);
104), felt washer (105), first spur gear (
106) and the boss (107) constitute a slip mechanism.

(109) is a second support shaft planted on the substrate (100), (110) is pivotally supported on this second support shaft (109),
a second spur gear (106) meshing with the first spur gear (106);
11) is a first bevel gear integrally formed with the second spur gear (110), and (112) is a second bevel gear that is press-fitted into the rotation shaft (3) and meshes with the first bevel gear (109). It's a gear. Then, the ohm (102), the ohm foil (104), the first spur gear (106), and the second spur gear (
110), the first bevel gear (111) and the second bevel gear (
112) constitutes a speed reduction mechanism.

Further, (113) and (113) are rotation support plates that pivotally support the vicinity of both ends of the rotation shaft (3), and both ends of the rotation shaft (3) are the ends of the upper case (22), respectively. It is connected to the part.

Next, the operation of the above-mentioned drive section (10) will be explained.

First, tilt up the remote control transmitter (4)
When the key is pressed, the drive motor (101) rotates.

The rotation of this drive motor (101) is ohm (102)
, two ohm foil (104), first spur gear (106),
The speed is reduced by the second spur gear (110), the first bevel gear (111), and the second bevel gear (112) and transmitted to the rotating shaft (3). Therefore, the display section (2) is connected to the drive motor (10
1) Rotates at a low speed even though it rotates at a high speed.

At this time, the ohmic foil (104) and the first spur gear (106) rotate together due to the frictional connection of the felt washer (105).

Then, when the display section (2) reaches the optimum angle, if the press of the chill UP key is released, the drive motor (101
) stops rotating, the rotation of the display section (2) also stops.

On the other hand, if the rotation of the display unit (2) is prevented by an external force while the drive motor (101) is rotating, the rotation of the first spur gear (106) is stopped, but the rotation of the ohm wheel (106) is stopped.
4) becomes possible to rotate due to slippage caused by the slip mechanism. Therefore, no unreasonable load is applied to the drive motor (101).

It is also possible to manually rotate the display section (2) by utilizing the slippage of the slip mechanism when the drive motor (101) is stopped.

In addition, in the above-mentioned embodiment, the case where it is used by placing it on a desk or the like is shown, but as shown in FIG. 6 (a), the lower case (16)
It can also be used as a wall-mounted TV by providing a key hole (16a) on the back side. In this case, as shown in FIG.
(151) to send the remote control signal to the light receiving element (152)
It would be better if you could guide it to.

(G) Effects of the Invention As described above, according to the present invention, the display unit can be rotated to any angle using the remote control device, so even if the installation position of the receiver and the viewing position are far apart, the display can be viewed. The display section can be adjusted to an optimal angle at any position, making it possible to compensate for the drawback of liquid crystal elements having a narrow effective viewing angle.

Furthermore, since the rotation of the drive motor is transmitted to the rotating shaft of the display section through the deceleration means, the display section rotates at a very low speed and the rotation angle can be finely adjusted.

In addition, since the deceleration means includes a slip mechanism, when the display section is being rotated, even if the rotation is prevented by an external force, the operation of the slip mechanism prevents excessive force from being applied to the drive motor, preventing damage. There is no fear.

Furthermore, the angle of the display section can also be varied manually when the drive motor is stopped.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a liquid crystal television receiver according to an embodiment of the present invention, and FIG. 2 is an 1111t! Ir surface diagram,
Fig. 3 is a perspective view of the drive section, Fig. 4 is a plan view thereof, Fig. 5 is a sectional view of the slip mechanism, Fig. 6 shows another embodiment of the present invention, and Fig. The perspective view (b) of the same figure is a schematic diagram of the light-receiving window. (1)...LCD television receiver body, (1o)...
... Drive unit, (15) (150) ... Light receiving window, (16
)...lower case, (2)...display section, (20)...
...Liquid crystal display panel, (21)...backlight, (
22)... Upper case, (3)... Rotating shaft, (4)
...Remote control transmitter.

Claims (3)

[Claims] (1) A liquid crystal television receiver main body, a display section rotatably attached to the main body and equipped with a liquid crystal panel, a drive section that rotationally drives this display section, and a remote control that controls this drive section. A liquid crystal television receiver comprising a control device. (2) The liquid crystal television receiver according to claim 1, wherein the drive section includes a drive motor and a deceleration means, and the rotation of the drive motor is transmitted to the display section via the deceleration means. (3) The liquid crystal television receiver according to claim 2, wherein the speed reduction means includes a slip mechanism.