KR20150111145A - Display apparatus - Google Patents

Abstract

According to an embodiment of the present invention, a display device includes: a display panel outputting an image; and a calibration device mounted on the rear surface of the display panel. The calibration device includes: a housing; a driving motor which is arranged on the inside or outside of the housing; a link assembly which is stored in the housing, is capable of being ejected to the outside of the housing by the power provided from a driving motor, and is capable of rotating or bending; and an imaging unit which is mounted on an end of the link assembly to record an image to be displayed on the display panel.

Description

[0001]

The present invention relates to a display device.

A display device such as a TV has a high-speed digital interface between the main chip and the memory for driving the system, video processing, and audio processing. In order to optimize the operation of the memory, a calibration process is performed according to the temperature and the application.

The calibration of the display device is generally performed in the production of the product in the factory, and the display device is produced with a specific register setting value determined.

A conventional technique relating to calibration used in TVs and the like is disclosed in Korean Patent No. 10-0775889.

In the case of a conventional calibrating device, the calibrating device is hidden inside the bezel so that it usually does not cover the screen, but a space must be formed between the bezel and the panel to accommodate the calibrating device. As a result, there is a high possibility that a foreign matter may flow into a gap between the panel and the bezel, and when the calibration device is broken or broken, the display panel device must be disassembled to repair the damage.

In addition, in the case of a display device such as an OLED TV which does not have a bezel itself, there is a disadvantage that the calibration device disclosed in the above-mentioned prior art can not be adopted.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems.

According to an aspect of the present invention, there is provided a display device including: a display panel to output an image; And a calibration device mounted on a back surface of the display panel, wherein the calibration device comprises: a housing; a driving motor placed inside or outside the housing; and a motor accommodated in the housing, A link assembly that can be drawn out of the housing and provided to be bent or rotatable, and an imaging unit mounted on an end of the link assembly and configured to photograph an image displayed on the display panel.

Wherein the link assembly is a polyphonic link in which a plurality of links are connected in a line and are rotatably interconnected and a link at the bottom end of the polyphonic link is rotatable at an angle located at a front face of the display panel .

The calibration device may further include a torsion spring provided on a rotation axis of the polyphonic link to rotate the links.

The calibration apparatus may further include a driving mechanism for transmitting a rotational force provided from the driving motor to the link assembly.

The driving mechanism may include a driving gear connected to a rotation shaft of the driving motor, and at least one transmission gear gear-coupled to the driving gear. In addition, a rack gear engaged with the transmission gear is formed on a side surface of the link assembly.

The calibration apparatus may further include a link movement restricting mechanism for setting a movement limit of the link assembly.

Wherein the link movement restricting mechanism includes a lever switch mounted on one side of the housing and an upper latching jaw and a lower latching jaw formed on a side surface of the link assembly and the lever switch is connected to the upper latching jaw or the lower latching jaw, When the jaw is caught, a movement stop signal is generated, and the operation of the drive motor is stopped.

The link movement restricting mechanism may include a magnet mounted on the upper and lower sides of the link assembly, and a Hall sensor mounted in the housing to sense a magnetic field generated from the magnet, The operation of the drive motor is stopped.

The calibration device includes at least one guide rib protruding from an inner surface of the housing and extending in a moving direction of the link assembly and a guide rib formed at a position corresponding to the at least one guide rib, And may further include at least one guide groove.

The calibration device may further include a leaf spring provided at one side of the polygonal link to rotate the links.

The calibration device may further include a driving mechanism for transmitting the rotational force provided from the driving motor to the link assembly to move the link assembly in the vertical direction, And a link holder mounted on an outer circumferential surface of the lead screw and moving up and down along the lead screw when the lead screw rotates, wherein an upper end of the link assembly is mounted on the link holder .

The link assembly may be a bendable link that can be extended and curved smoothly.

The calibration device may further include a hinge shaft provided in the housing and connected to one end of the link assembly and rotated by the drive motor, and the link assembly may be a U-shaped bent link.

The calibration apparatus may automatically perform a calibration process before reproduction of a specific content through the display panel or upon occurrence of a specific event. The specific content may include at least one of super-high-quality image content, motion-rich content, a movie, and a natural documentary.

The specific event may include at least one of entry of a gallery having a high-resolution photograph, entry of a specific web site, execution of an application requiring a high resolution, and broadcast additional information reference status.

The specific event may include at least one of a case where the average image quality is lower than a set value due to the display device not being turned on for a long time, a case where a temperature change occurs, and a case where a scene changes during content reproduction.

The calibration device may be operated so that the calibration process is performed when the display panel is turned off.

The calibration device operates simultaneously with the display panel being turned on to perform a calibration process, and when the calibration process is completed, the content may be displayed on the display panel.

When the calibration operation is performed during the reproduction of the content, the reproduction of the content may be temporarily stopped until the calibration process is completed.

The display device according to the embodiment of the present invention has the following advantages.

First, since the calibration device is mounted on the back surface of the display panel, there is an advantage that it can be applied to a display device in which a bezel is not provided, that is, an OLED TV structure.

Secondly, since the calibration device is mounted on the back surface of the display panel, it is easy to separate only the calibration device, which makes it easy to repair and replace the calibration device.

Thirdly, in the calibration process, the imaging unit moves from the back to the front of the display panel and is hidden behind the display panel when the calibration process is not performed.

1 is a front view of a display device provided with a calibration device according to an embodiment of the present invention;
2 is a rear view of the display device.
3 is a front perspective view of a calibration device according to an embodiment of the present invention.
4 is a rear perspective view of the calibration device.
5 is an exploded perspective view illustrating an internal structure of a calibration apparatus according to an embodiment of the present invention;
6 is a front perspective view of a link assembly of a calibration apparatus according to an embodiment of the present invention.
7 is a rear perspective view of the link assembly.
FIGS. 8 to 10 sequentially illustrate how the link assembly of the calibration apparatus is driven for a calibration operation. FIG.
11 is a perspective view of a calibration apparatus according to another embodiment of the present invention.
12 is a perspective view showing the internal structure of the calibration apparatus;
13 is an enlarged perspective view of the link holder.
Figure 14 is a cross-sectional view taken along II of Figure 12;
FIG. 15 is a longitudinal sectional view taken along line II 'of FIG. 12; FIG.
FIGS. 16 through 18 sequentially illustrate how the link assembly of the calibration apparatus is driven for a calibration operation. FIG.
Figure 19 is a side view conceptually illustrating a calibration device in accordance with yet another embodiment of the present invention.
Figure 20 is a side view conceptually illustrating a calibration device in accordance with yet another embodiment of the present invention.

Hereinafter, a configuration and operation of a display device and a calibration device provided with a calibration device according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a display device provided with a calibration device according to an embodiment of the present invention, and FIG. 2 is a rear view of the display device.

1 and 2, a display device 10 according to an embodiment of the present invention includes a display panel 12 to which an image is output, a stand 11 for supporting the display panel 12, And a calibration device 20 mounted on the back of the display panel 12.

FIG. 3 is a front perspective view of a calibration apparatus according to an embodiment of the present invention, and FIG. 4 is a rear perspective view of the calibration apparatus.

3 and 4, a calibration apparatus 20 according to an exemplary embodiment of the present invention includes a housing 200, a link assembly 300 which is drawn out from the housing 200 or introduced into the housing 200, (23) and an imaging unit (31) provided on the entire lower end of the link assembly (23).

In detail, the housing 200 may include a case 21 formed with a space for accommodating various components therein and having a rear surface, and a cover 22 covering the opened rear surface of the case 21 .

Hereinafter, the detailed structure of the calibration device 20 will be described in detail with reference to the drawings.

5 is an exploded perspective view showing an internal structure of a calibration apparatus according to an embodiment of the present invention.

5, a link assembly 23 on which the image pickup unit 31 is mounted is installed on one side of the case 21 so as to be movable in the vertical direction, and on one side of the link assembly 23, A drive mechanism 30 for driving the link assembly 23 is placed. A lever switch 24 is provided on the other side of the link assembly 23 to sense a maximum withdrawal time and a maximum withdrawal time of the link assembly 23. A signal sensed by the lever switch 24 is transmitted to the control unit of the calibration device 20 and the control unit stops the operation of the driving mechanism 30 so that the descent or the rise of the link assembly 23 Stop it. Here, as a means for detecting the stopping point of the link assembly 23, other types of sensing means other than the lever switch 24 may be applied. For example, a magnet is mounted on a lower end portion and an upper end side surface of the link assembly 23, and a hole sensor (not shown) for sensing a magnetic force generated from the magnet is provided on one side of the case 21, a hall sensor may be mounted.

A locking hook 212 protrudes from the rear upper end of the case 21 and a hook locking end 222 with which the locking hook 212 is engaged may be formed at the upper end of the cover 22. When the cover 22 is mounted on the opened rear side of the case 21, the hooking hook 212 is caught by the hooking end 222. Then, the cover 22 can be fixed to the case 21 using fastening members such as screws.

A pair of sliding guide ribs 211 are vertically extended from the rear surface of the case 21 to guide the link assembly 23 up and down. A sliding guide rib 221 is vertically extended on the front surface of the cover 22 so as to guide the link assembly 23 up and down while being in close contact with the rear surface of the link assembly 23.

The drive mechanism 30 for moving the link assembly 23 in the up and down direction includes a drive motor 31, a drive gear 32 connected to the rotation shaft of the drive motor 31, And a transmission gear 33 connected to the drive motor 32 to transmit the rotational force generated by the drive motor 31 to the link assembly 23. The transmission gear 33 includes a first transmission gear 331 gear-coupled to the driving gear 32, a second transmission gear 332 gear-coupled to the first transmission gear 331, A second transmission gear 332 and a third transmission gear 333 connected to the side surfaces of the link assembly 23. However, it should be noted that the shape of the transmission gear 33 is not limited to the illustrated embodiment, and transmission gears of various shapes and modes can be provided. That is, any type of transmission gear configuration capable of transmitting the rotational force generated from the drive motor 31 to the link assembly 23 is possible in addition to the illustrated embodiment.

FIG. 6 is a front perspective view of a link assembly included in a calibration apparatus according to an embodiment of the present invention, and FIG. 7 is a rear perspective view of the link assembly.

6 and 7, the link assembly 23 according to the embodiment of the present invention is configured such that the first link 25 and the second link 26 and the third link 27 are connected to the hinge 28 Can be connected structure. The hinge 28 connecting the links is provided with an elastic member such as a torsion spring 29 so that the second and third links 26 and 27 can be rotated up to 90 degrees about the hinge 28 It can be rotated.

In detail, a sliding guide groove 251 is formed on the left and right edges of the first link 25 so as to be stepped so that the sliding guide rib 211 provided on the case 21 is seated. A rack gear 252 is formed on the left side of the first link 25 so that the third transmission gear 333 is gear engaged. Therefore, when the third transmission gear 333 rotates in one direction, the link assembly 23 including the first link 25 descends, and when the third transmission gear 333 rotates in the other direction, the link assembly 23 ascends. The lever groove 254 is extended downward by a predetermined depth at a left edge of the rear surface of the first link 25, that is, the opposite edge of the surface on which the rack gear 252 is formed. The lever switch 24 is placed in the lever groove 254. An upper latching protrusion 255 is formed at an upper end of the lever groove 254. When the lever switch 24 is caught by the upper latching jaw 255 while the first link 25 is lowered, . When the link stop signal is transmitted to the control unit, power supply to the drive motor 31 is interrupted. A central guide groove 253 is formed at the center of the rear of the first link 25 and the central guide groove 253 extends from the upper end to the lower end of the first link 25. When the cover 22 is coupled to the case 21, the sliding guide ribs 221 formed on the cover 22 are seated in the central guide groove 253, Thereby guiding upward and downward movement.

A partition rib 264 protrudes from the center of the right side of the second link 26 and extends a predetermined length in the longitudinal direction of the second link 26. A sliding guide rib 211 of the case 21 is placed in front of the partition rib 264 and the lever switch 24 is placed in the rear. In other words, when the link assembly 23 is raised or lowered, the lever switch 24 passes through the rear surface of the partition rib 264. [ A rack gear 262 is also formed on the left side of the second link 26 so as to be gear-engaged with the third transmission gear 333. A sliding guide groove 261 is formed at the front edge of the second link 26 on the side where the rack gear 262 is formed and the sliding guide rib 211 is inserted into the sliding guide groove 261 Lt; / RTI > A central guide groove 263 is formed from the upper center to the lower end of the second link 26 to accommodate the sliding guide rib 221.

A guide groove 271 is formed at the left and right edges of the front surface of the third link 27 and a sliding guide rib 211 of the case 21 is seated in the guide groove 271. A rack gear 272 is formed on the right side edge of the rear surface of the link 27 to engage with the third transmission gear 333. The lever groove 274 is stepped to a predetermined depth and extends downward at the left edge of the rear surface of the third link 27, that is, the opposite edge of the surface on which the rack gear 272 is formed. The lever switch (24) is placed in the lever groove (274). A lower latching protrusion 275 is formed at a lower end portion of the lever groove 274. In detail, when the third link 27 rises and the lever switch 24 is hooked on the lower stopping jaw 275, a link stop signal is generated and the power supplied to the driving motor 31 is cut off. A center guide groove 273 is also formed in the center of the rear surface of the third link 927.

An image pickup unit 34 such as a camera is mounted on the lower end area of the front surface of the third link 27 to take an image displayed on the display panel 12 for calibration. One or a plurality of spaced apart projections 276 protrude from one side of the front surface of the third link 27 so that the front surface of the third link 27 is completely So that they can be spaced apart from each other by a predetermined distance. This is because the front surface of the third link 27 is slightly spaced from the display panel 12 to enhance the quality of the image taken from the imaging unit 34. [

According to this structure, the central guide grooves 253, 263, and 273 formed at the center of the back surface of the first to third links 25, 26 and 27 are collinearly received, and the sliding guide ribs 221 are accommodated. The third transmission gear 333 rotates while engaged with the rack gears 252, 262, and 272 to move the link assembly 23 in the vertical direction.

Hereinafter, the operation of the calibration apparatus will be described in detail with reference to the drawings.

FIGS. 8 to 10 are views sequentially illustrating the operation of the link assembly of the calibration apparatus for the calibration operation.

Referring to FIG. 8, before the calibration operation starts, the link assembly 23 is retained in the housing 200 as shown in FIG. According to the design of the housing 200, a portion of the link assembly 23 may protrude out of the housing 200.

Referring to FIG. 9, when a calibration operation command is input, power is applied to the driving motor 31 to rotate the driving gear 32 in one direction. Then, the transmission gear 33 engaged with the driving gear 32 rotates, and the link assembly 23, which is gear-coupled to the transmission gear 33, descends. When the third link 27 descends to a point beyond the lower end of the display panel 12, the torsion mounted on the hinge 28 connecting the second link 26 and the third link 27 The third link 27 is rotated 90 degrees upward with respect to the hinge 28 by the restoring force of the spring 29.

10, when the link assembly 23 further descends in the state of FIG. 9, the second link 26 also moves out of the lower end of the display panel 12, and the first link 25 The second link 26 rotates upward by 90 degrees about the hinge 28 by the restoring force of the torsion spring 29 mounted on the hinge 28 connecting the second link 26. The third link 27 also rotates 90 degrees so that the front surface of the third link 27 faces the front surface of the display panel 12.

In detail, when the third link 27 rotates and becomes horizontal, it is brought into a state of being in close contact with the lower surface of the display panel 12. In this state, when the link assembly 23 further descends, the third link 27 is in contact with the lower surface of the display panel 12, and is in contact with the second link 26 The hinge 28 is further lowered. That is, the third link 27 rotates obliquely downward from the horizontal state of FIG. 9, and is vertically rotated when the second link 26 rotates in a horizontal state, . The third link 27 is spaced apart from the front surface of the display panel 12 by a spacing protrusion 276 protruding from the front surface of the third link 27. The third link 27 faces the display panel 12 and captures a calibration screen displayed on the display panel 12 through the imaging unit 34. [

On the other hand, when the calibration operation is completed, the drive motor 31 rotates in the reverse direction, and the link assembly 23 ascends. The link assembly 23 moves along the front surface, the bottom surface, and the rear surface of the display panel 12 and moves into the housing 200. The ascending process of the link assembly 23 may be performed in the reverse order of the descending process.

FIG. 11 is a perspective view of a calibration apparatus according to another embodiment of the present invention, and FIG. 12 is a perspective view showing an internal structure of the calibration apparatus.

11 and 12, a calibration apparatus 50 according to another embodiment of the present invention includes a drive motor 51, a lead screw 52 connected to the rotation shaft of the drive motor 51, A link holder 53 mounted on an outer circumferential surface of the lead screw 52 and moving up and down along the lead screw 52, a link assembly 57 coupled to the link holder 53, And a housing 500 that covers and protects a configuration other than the housing 500. The housing 500 is fixed to the back surface of the display panel 12.

The link assembly 57 includes a first link 54 directly connected to the link holder 53 and a second link 54 pivotally connected to the lower end of the first link 54 by a first connector 58. [ A third link 56 rotatably coupled to the lower end of the second link 55 by the second connector 59 and a second link 55 connected to the first link 54 , 55, and 56, respectively.

Guide grooves 541, 551, 561 are formed on both sides of the first to third links 54, 55, 56, and guide ribs (not shown) may be formed on the inner side surfaces of the housing 500 have. Therefore, the link assembly 57 is moved up and down in a state where the guide ribs are inserted into the guide grooves 541, 551, and 561. The link assembly 57 maintains a linear state without being bent inside the housing 500 due to the coupling structure of the guide ribs and the guide grooves. Each of the links is bent by the restoring force of the leaf spring 60 when completely lifted from the housing 500.

On the other hand, the spacing projection 562 and the image pickup unit 61 are mounted on the front surface of the third link 56 on the lowermost side as in the previous embodiment. The drive motor 51 may be mounted outside the housing 500, but may be housed in the housing 500 so as not to be exposed to the outside.

13 is an enlarged perspective view of the link holder.

13, the link holder 53 is coupled to surround the lead screw 52, and a protrusion 531 is formed on the inner circumferential surface of the link holder 53 contacting the lead screw 52 .

The link assembly 57 is formed in a shape such that the protrusion 531 can be engaged with the valley portion of the screw. The link holder 53 descends or rises along the leadscrew 52 when the leadscrew 52 is rotated forward or reverse due to the rotation of the leadscrew 52 by the housing 500.

Fig. 14 is a cross-sectional view taken along line I-I in Fig. 12, and Fig. 15 is a longitudinal sectional view taken along line I-I in Fig.

Referring to FIGS. 14 and 15, the second link 55 is rotatably connected to the first link 54 by the first connector 59.

The first connector 58 protrudes from the bottom surface of the first link 54 by a predetermined length. On the upper surface of the second link 55, (553) is recessed. On both sides of the receiving groove 553, an axis projection 553 serving as a rotation center of the second link 55 is projected. A fitting groove or a fitting hole 581 in which the shaft protrusion 553 is inserted may be formed at the lower end of the first connector 58.

On the rear surface of the second link 55, a spring receiving groove 552 for receiving the leaf spring 60 is formed extending in the vertical direction. The plate spring 60 may be independently coupled to the link connection portion. However, a single leaf spring 60 may be provided without being limited thereto. That is, the upper end of one leaf spring 60 may be inserted into the first link 54 and the lower end may be inserted into the third link 56.

When the second link 55 completely disengages from the housing 500, the second link 55 urges the shaft protrusion 553 by the elastic force of the leaf spring 60. As a result, And is horizontal on the bottom surface of the display panel 12. The connection structure of the second link 55 and the third link 56 is also the same as that of the second link 55, so that redundant description will be omitted.

FIGS. 16 to 18 are views sequentially illustrating the operation of the link assembly of the calibration apparatus for the calibration operation.

Referring to FIG. 16, in the state where the link assembly 57 is accommodated in the housing 500, since the guide ribs are inserted into the guide grooves 541, 551, and 561, the link assembly 57 maintains a straight line state.

17, when the driving motor 51 rotates in one direction, the lead screw 52 rotates. When the lead screw 52 rotates, the link holder 53 contacts the lead screw 52, . When the third link 56 is completely removed from the housing 500, the third link 56 rotates about the shaft protrusion 553 by the elastic force of the leaf spring 60. Then, the third link (56) is horizontal on the bottom surface of the display panel (12).

18, when the second link 55 is further moved away from the housing 500, the link assembly 57 is further rotated by the elastic force of the leaf spring 60 to rotate the display panel 12, As shown in Fig. At the same time, the third link 56 is further rotated by 90 degrees to be vertically opposed to the front surface of the display panel 12. The separation protrusions 562 are brought into contact with the front surface of the display panel 12 and the imaging unit 61 is separated from the front surface of the display panel 12 as described above.

19 is a conceptual side view of a calibration apparatus according to yet another embodiment of the present invention.

19, the calibration apparatus 70 according to the present embodiment includes a housing 72 fixed to a rear upper end region of the display panel 12, a link assembly 74 projected upward from the housing 72, And an image pickup unit 71 mounted on an end of the link assembly 84. [

In detail, the link assembly 84 may be a bendable link that can be extended and curved smoothly. In other words, the link assembly 74 may be a member that is bent to a predetermined curvature by the driving unit to move to the front side of the display panel 12 through the upper end of the display panel 12. For example, a flexible cable capable of bending can be used, and such a flexible cable is already applied to an endoscopic imaging apparatus.

20 is a side view conceptually illustrating a calibration apparatus according to yet another embodiment of the present invention.

20, the calibration apparatus 80 according to the present embodiment includes a housing 82 fixed to the upper end region of the rear surface of the display panel 12, and a hinge shaft 83 A link assembly 84 which is rotatably connected to the link assembly 84 and is bent in a U-shape, and an image pickup unit 81 mounted at the other end of the link assembly 84.

In detail, the link assembly 84 is received in the housing 82 in a U-shape in a state of being connected to the hinge shaft 83, and the hinge shaft 83 is rotated by a driving motor (Counterclockwise in the drawing) toward the front of the display panel 12 when it rotates. Then, the link assembly 84 rotates in an inverted U-shape, so that the imaging unit 81 is positioned in front of the display panel 12. [

Meanwhile, the calibration apparatus according to the embodiments described above can operate in the following cases in common.

First, the calibration process may be performed automatically before the specific content is reproduced on the display panel 12 or when an event occurs.

Specifically, the calibration process can be performed automatically before an Ultra High Definition image, a motion-rich content, a movie, a natural documentary, or the like is reproduced.

In addition, the calibration process can be automatically performed at the time of entry of a gallery site or a folder having a high resolution picture, at the entrance of a specific web site, and at the time of executing an application requiring high resolution, when referring to broadcast additional information.

If the average image quality drops below a specific value or if a temperature change occurs, a calibration process may be performed automatically or a notification popup window recommending the user to perform a calibration process may be displayed. You may.

In addition, the calibration process can be automatically started when a section requiring a new mode is started during the set time, such as when a scene changes during the content playback.

In addition, when it is determined that the calibration process is required according to any one of the above cases, the calibration process may be performed automatically at the same time that the display device is turned off, or automatically after the display device is turned on again, Output.

In addition, when the calibration process is started during the reproduction of the content, the reproduction of the corresponding content can be stopped until the calibration process is completed.

Claims (19)

A display panel on which an image is output; And
And a calibration device mounted on a back surface of the display panel,
The calibration device includes:
A housing,
A drive motor disposed inside or outside the housing,
A link assembly accommodated in the housing and capable of being drawn out of the housing by a power supplied from the driving motor and being provided to be bent or rotatable;
And an imaging unit mounted on an end of the link assembly and configured to capture an image displayed on the display panel. The method according to claim 1,
The link assembly includes:
A plurality of links are connected in series and are rotatably interconnected,
Wherein the link at the lowermost end of the polygonal link is rotatable at an angle to the front of the display panel. 3. The method of claim 2,
Wherein the calibration device further comprises a torsion spring provided on a rotation axis of the polyphonic link to rotate the links. The method of claim 3,
Wherein the calibration device further comprises a drive mechanism for transmitting the rotational force provided from the drive motor to the link assembly,
The driving mechanism may include:
A driving gear connected to a rotating shaft of the driving motor,
And at least one transmission gear that is gear-coupled to the driving gear,
And a rack gear engaged with the transmission gear is formed on a side surface of the link assembly. The method according to claim 1,
Wherein the calibration apparatus further comprises a link movement restricting mechanism for setting a movement limit of the link assembly. 6. The method of claim 5,
The link movement restricting mechanism includes:
A lever switch mounted on one side of the housing,
And an upper and a lower jaws formed on side surfaces of the link assembly,
Wherein when the lever switch is hooked on the upper jaw or the lower jaw, a movement stop signal is generated to stop the operation of the drive motor. 6. The method of claim 5,
The link movement restricting mechanism includes:
A magnet mounted on the upper and lower sides of the link assembly,
And a hall sensor mounted in the housing for sensing a magnetic field generated from the magnet,
And the operation of the driving motor is stopped when a sensing signal is generated in the hall sensor. The method according to claim 1,
The calibration device includes:
At least one guide rib protruding from an inner surface of the housing and extending in a moving direction of the link assembly,
And at least one guide groove recessed from an outer circumferential surface of the link assembly at a position corresponding to the at least one guide rib. 3. The method of claim 2,
The calibration device includes:
And a leaf spring provided at one side of the polyphonic link to rotate the links. 10. The method of claim 9,
The calibration device includes:
Further comprising a driving mechanism for transmitting the rotational force provided from the driving motor to the link assembly to move the link assembly in a vertical direction,
The driving mechanism may include:
A lead screw connected to a rotating shaft of the driving motor,
And a link holder mounted on an outer circumferential surface of the lead screw and moving up and down along the lead screw when the lead screw rotates,
And an upper end of the link assembly is mounted to the link holder. The method according to claim 1,
Wherein the link assembly is a bendable link that can be extended and curved smoothly. The method according to claim 1,
The calibration device includes:
Further comprising a hinge shaft provided in the housing and connected to one end of the link assembly and rotated by the drive motor,
Wherein the link assembly is a U-shaped bent link. The method according to claim 1,
Wherein the calibration device automatically operates before the reproduction of the specific content through the display panel or when a specific event occurs, and performs the calibration process. 14. The method of claim 13,
The specific content is,
A high-definition image content, a motion-rich content, a movie, and a natural documentary. 14. The method of claim 13,
The specific event may be,
Wherein the display device includes at least one of a gallery entry having a high resolution photograph, a specific web site entry, an application execution requiring a high resolution, and a broadcasting additional information reference situation. 14. The method of claim 13,
The specific event may be,
And a case in which the average image quality is lower than a set value due to not turning on the display device for a long time, a temperature change occurs, and a scene changes during the reproduction of the content. 14. The method of claim 13,
Wherein the calibration device operates simultaneously with the display panel being turned off to perform a calibration process. 14. The method of claim 13,
Wherein the calibration device operates simultaneously with the display panel being turned on to perform a calibration process, and when the calibration process is completed, the content is displayed on the display panel. 14. The method of claim 13,
Wherein when the calibration is performed during the reproduction of the content and the calibration process is performed, the reproduction of the content is temporarily stopped until the calibration process is completed.

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