KR20040082142A - Screen covering apparatus in a display unit - Google Patents

Abstract

PURPOSE: A screen cover device for a display device is provided to reduce space and be silently operated by adopting a linear motor. CONSTITUTION: A rotatable reel(16) is parallel to an edge of a screen(14) at an external side of the screen and is disposed in a frame(12). An one end of an opaque cover(18) is fixed in the rotatable reel, and is removably accommodated in the rotatable reel. A linear motor is vertical with the rotatable reel at the external side of the screen, and is disposed in the frame. The liner motor moves the other end of the opaque cover so that the opaque cover covers the screen.

Description

SCREEN COVERING APPARATUS IN A DISPLAY UNIT}

The present invention relates to a screen cover device of a display device of the present invention, and more particularly, to a screen cover device of a display device that can operate quietly while reducing space by employing a linear motor.

In general, screen displays such as televisions, plasma display panels (PDPs), projection receivers, and large liquid crystal display (LCD) panels have screen covers that protect the screen surfaces according to their characteristics.

The screen cover has typically been configured to open and close manually, but may also be operated using drive means such as a motor for ease of use. An example of such a conventional motor driven screen cover device is shown in FIG. 1.

Referring to FIG. 1, the conventional screen cover has an opening of approximately the same size on the screen surface as in FIG. 1, and rollers 1 and 2 rotated by the motors 3 and 4 mutually on both sides of the opening. It is installed in parallel, and the screen cover 5 is wound in parallel with each other in the upper and lower parts of the left and right rollers. That is, the opening and closing of the cover with respect to the screen surface is adjusted by driving the left and right rollers 1 and 2 by the motors 3 and 4 on both sides of the opening.

The opening and closing device of the screen cover having such a configuration requires a motor and a roller on each of the left and right sides, so that its configuration and operation are complicated, resulting in low economy and efficiency. In addition, as the space occupied by the motor and the roller increases, the weight of the screen in the display device as a whole decreases. This is in line with the recent consumer preferences for large display device-to-screen ratios. In addition, since the roller and the screen cover is operated by the motor and the gear, noise is generated, which makes it impossible to provide a comfortable environment to the user.

Accordingly, an object of the present invention is to provide a screen cover device of a display device that comforts a user by operating quietly while occupying little space.

1 is a perspective view schematically showing an example of a screen cover device of a display device according to the prior art.

2 is a perspective view of a screen cover device of a display device according to a first embodiment of the present invention.

3 is a front view of FIG. 2.

4 is a detailed view of portion A of FIG. 2.

5 is a detailed plan view of a portion B of FIG. 2.

6 is a partially enlarged perspective view of the screen cover of the screen cover device according to the present invention.

7 is a front view of a screen cover device of a display device according to a second embodiment of the present invention.

8 is a front view of a screen cover device of a display device according to a third embodiment of the present invention.

<Explanation of symbols of main parts in drawings>

10: display device 14: screen

16: reel 18: screen cover

20: mover 24: stator

26: sensor 38: antistatic layer

According to an aspect of the present invention for achieving the above object of the present invention, there is provided a screen cover device of a display device having a frame and a screen disposed in front of the frame. The screen cover device includes a rotatable reel disposed outside the screen in parallel with its edge; A flexible opaque cover, one end of which is fixed to the inside of the reel and received in the reel so as to be released; And a linear motor disposed outside the screen in the frame perpendicular to the reel to move the other end of the cover so that the cover covers the screen.

The screen cover device of the present invention employs a linear motor to move the screen cover, thereby reducing the space occupied by the motor for rotating the reel or roller, and reduces the noise generated by the motor to ensure quiet operation. can do.

Various features and advantages of the invention, which will be described in connection with the following detailed description and the accompanying drawings, will be apparent to those skilled in the art.

In describing the embodiment according to the present invention, an example of a display apparatus is a commercial display and a large-screen plasma display apparatus (PDP), which is expected to increase in demand, as an example, but this is only an example and the present invention is limited to the plasma display apparatus. It doesn't happen. Hereinafter, the plasma display device will be referred to as a PDP. Meanwhile, in the present specification, the term 'right' or 'left' refers to the right or left side of the drawings, and the term 'upper' or 'lower' also refers to the upper or lower side of the drawings, and other positional representations are also drawings. Say the location of the statue.

2 is a perspective view of a screen cover device of a display apparatus according to a first embodiment of the present invention, FIG. 3 is a front view of FIG. 2, FIG. 4 is a detailed view of a portion A of FIG. 2, and FIG. 5 is of FIG. 2. Detailed view of part B.

2 to 5, the PDP 10 includes a flat box-shaped frame 12 and a rectangular screen 14 installed on the front of the frame 12. On the right side of the frame 12 is mounted a reel 16 to which the flexible opaque screen cover 18 is wound. The reel 16 may be integrally mounted to the frame 12 or may be detachably mounted to the frame 12 by any attachment means shown in dashed lines.

Most of the screen cover 18 having one end fixed inside the reel 16 is drawn out of the reel 16 to cover most of the screen 14. The exposed end of the screen cover 18 is moved relative to the reel 16 by a pair of linear motors, the upper side and the lower side.

The linear motor is fixed to the other end of the screen cover 18, the mover 20 for moving the other end of the screen cover 18, the slide plate 22 which the mover 20 slides and the slide plate 22 And a stator 24 attached thereto. In the present embodiment, the mover 20 is configured as a permanent magnet, and the mover 20 is illustrated as being configured as a coiled electromagnet, but the reverse is also possible.

In this embodiment, the linear motor is illustrated as being installed in a pair on the upper side and the lower side of the screen 14, but the linear motor is installed on either one of the upper side and the lower side, preferably the upper side, and the cover (on the other side). A guide (not shown) for guiding 18 may be provided.

On the other hand, since the configuration of such a linear motor is well known in the art, further detailed description of the configuration is omitted.

As shown in detail in FIG. 4, the mover 20 is coupled to the upper edge of the cover 18 and may slide on the slide plate 22. On the other hand, stoppers 26 are installed at both ends of the slide plate 22. The stopper 26 is for preventing the mover 20 from being separated from the slide plate 22. In addition, a stop sensor 26 is attached to the stop sensor 26, and detects that the mover 20 is approaching or spaced apart from the stopper 26, and transmits it to a controller (not shown). The controller receiving the signal may control the operation of the mover 20 by selectively interrupting the supply of current to the mover 20 or the stator 24.

On the other hand, the reel 18 is made of a hollow cylinder, the inside is mounted with a shaft 32 that is rotated by a rotary motor (not shown). A slot 30 is formed on the outer circumference of the reel 18 so that the screen cover 18 is inserted into the reel 16 through the slot 30 of the reel so that the rotating shaft 32 as shown by a dotted line in FIG. 5. ) Wound around. The rotary shaft 32 is rotated by a rotary motor (not shown) installed above or below the reel 16 to wind the screen cover 18 when the mover 20 moves to the right in the linear motor. Meanwhile, the rotary motor may be installed outside the reel 16 as shown in FIG. 1 and may be connected to the rotary shaft 32 by an electric gear.

With this arrangement, since the linear motor and the rotary motor cooperate when the screen cover 18 is wound, the screen cover 18 can be wound on the shaft 32 even with a small driving force of the rotary motor. This makes it possible to reduce the size of the rotating motor to reduce the size of the entire reel 16 and allow for quiet operation.

On the other hand, the controller can prevent the rotation shaft 32 from pulling the screen cover 18 excessively by calculating the rotation speed of the rotation shaft 32 to stop the rotation of the motor. On the contrary, the stopper 26 on the right side may also be equipped with a detection sensor (not shown), and when the mover 20 is detected, the rotation of the rotating motor may be stopped.

Alternatively, the rotary shaft 32 may be rotated to wind the screen cover 18 by elastic means such as a spring. In this case, the rotation of the rotary shaft 32 by the elastic means is set in consideration of the entire length of the screen cover 18. In addition, the driving force of the linear motor must be greater than the elastic force of the spring, and a means for locking the spring to prevent the spring from applying force to the rotating shaft 32 while the screen cover 18 covers the screen 14 must be provided. .

On the other hand, the guide roller 34 is installed between the stopper 26 and the reel 16 on the right side. The guide roller 34 is located in front of the stopper 26 so that a gap G having a predetermined dimension is formed between the stopper 26 and the screen cover 18 as shown in FIG. 5. Such a guide roller 34 may be omitted. However, when the guide roller 34 is omitted, the screen cover 18 stops when the front surface of the reel 16 does not advance to the position of the guide roller 34. 26) there is a risk that the cover 18 will be damaged by friction. In addition, in order to advance the front surface of the reel 16, the diameter of the reel 16 or the reel 16 itself must be positioned forward, which increases the space occupied by the reel 16 or may damage the aesthetics. There is concern.

Meanwhile, a controller (not shown) may be installed on one side of the frame 12 or the reel 16, and the controller may control the operation of the linear motor and the reel 16. The control unit may also receive an operation signal from the user by a remote controller not shown. Alternatively, a switch (not shown) is provided on one side of the front surface of the frame 12, and a user can input an operation signal to the controller by operating the switch.

Alternatively, the controller may be installed in conjunction with a power supply (not shown) of the display apparatus 10. That is, when the power of the display device 10 is turned off, the linear motor operates to cover the screen 14 automatically, and when the power is turned on, the linear motor and the reel 16 operate to screen the screen cover 18. The control unit can be configured to open the screen 14 automatically away from.

6 is a partially enlarged perspective view of the screen cover used in the screen cover device according to the present invention. Referring to FIG. 6, the background screen layer 36 is attached to the front surface of the screen cover 18, and the antistatic layer 38 is attached to the rear surface of the screen cover 18.

An interesting background may be selected as the screen of the background screen layer 36 according to a user's preference. Attaching such a background screen layer 36 to the front of the screen cover 18 improves the monotonous appearance of the screen cover 18 when the display device 10 is turned off and the screen cover 18 covers the screen 14. can do. The background screen layer 36 may be printed directly on the cover 18, or the screen layer 36 may be adhered to and attached to the cover 18.

Meanwhile, the antistatic layer 38 is made of an antistatic agent, which is also commonly referred to as a conductive material, to absorb or block static electricity that may be emitted from the screen 14 of the display device 10.

Many antistatic agents are commercially available, including inorganic and organic. Examples of the inorganic system are carbon black, carbon fiber, and indium tin dioxide (ITO). There are various organic systems including anionic, fatty acid ester and nonionic surfactants. On the other hand, as the semiconductive material, one coated with aluminum oxide on zinc oxide, and one coated with tin oxide and / or antimony on titanium oxide or potassium titanate is known.

7 is a front view of a screen cover device of a display device according to a second embodiment of the present invention. Referring to FIG. 7, the screen cover device according to the second embodiment is distinguished from the screen cover device according to the first embodiment in that a reel 116 is installed below the frame 112. Since the reel 116 is disposed in this manner, the mover 120, the slide plate 122, and the stator 124 of the linear motor interlocked with the reel 116 are disposed substantially at right angles with the reel 116.

Thus, the mover 120 and the screen cover 118 attached thereto open and close the screen 114 while moving in the vertical direction. In other words, the above-described components differ in arrangement direction from the corresponding components of the first embodiment, but the basic configuration and functions are substantially the same. The same applies to the other components.

On the other hand, in the second embodiment, the reel 116 is disposed below the frame 112, but the reel 116 may be disposed above the frame 112.

8 is a front view of a screen cover device of a display device according to a third embodiment of the present invention. Referring to FIG. 8, the screen cover device according to the third embodiment is distinguished from the screen cover device of the above-described first embodiment in that a pair is installed on the left and right sides of the display device.

That is, the screen cover device on the right side is substantially the same as the screen cover device of the first embodiment except that the slide plate 222 and the connected stator 224 are short in length. Meanwhile, the second screen cover device on the left side is configured such that the first screen cover unit on the right side and the arrangement direction thereof are replaced.

When the screen cover device is configured in this manner, the moving distance of the mover 220 is relatively short, and accordingly, the length of the screen cover 218 inserted into the reel 216 is shortened. Given that screen cover 218 is made of a flexible material and is therefore likely to be pinched or partially picked up when wound on revolving shaft 232 inside reel 216, shortening the length of screen cover 218 may be such that Less likely to be greedy.

Meanwhile, the screen cover device of the third embodiment may be modified in a similar manner to the screen cover device of the second embodiment described above. That is, by placing the reels on both the upper side and the lower side of the frame, a pair of screen cover devices, which are substantially the same as the screen cover device of the above-described second embodiment, can be respectively provided on the upper and lower sides of the frame. This adjusts the length of time that the cover is wound on the rotary shaft is shorter. On the other hand, in this case, the components of each screen cover unit are substantially the same as the components of the above-described second embodiment.

According to preferred embodiments of the present invention as described above, since the screen cover is driven by a linear motor, it is possible to reduce the space occupied by the entire screen cover device. In addition, the linear cover allows the screen cover to operate quietly when opening and closing the screen.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that modifications and variations can be made.

Claims (11)

A display device having a frame and a screen disposed in front of the frame, the display device comprising: A rotatable reel disposed outside of the screen parallel to the edge thereof in the frame; A flexible opaque cover, one end of which is fixed to the inside of the reel and received in the reel so as to be released; And And a linear motor disposed in the frame perpendicular to the reel outside the screen to move the other end of the cover so that the cover covers the screen. 2. The reel of claim 1, wherein the reel includes a hollow cylindrical housing, a shaft rotatably mounted within the housing so that the screen cover is wound, and a slot formed in the longitudinal direction of the housing so that the screen cover passes. The screen cover device of the display device. The screen cover device of claim 1, further comprising a rotating motor for rotating the reel. The screen cover apparatus of claim 3, further comprising a controller configured to control the rotating motor. The screen cover apparatus of claim 1, wherein the reels are disposed vertically. The screen cover apparatus of claim 1, wherein the reel is disposed horizontally. The screen cover apparatus of claim 1, wherein an antistatic agent is coated on an inner surface of the cover. The screen cover apparatus of claim 1, further comprising an antistatic sheet adhered to the inside of the cover. The screen cover apparatus of claim 1, wherein the reels are disposed on both sides of the screen. The screen cover apparatus of claim 1, wherein the linear motor comprises a pair of motors opposed to each other with the screen interposed therebetween. The screen cover device of claim 1, further comprising a controller for controlling the linear motor.