Display device

Abstract

One embodiment of the display device includes a display unit, a first module positioned below the display unit and irradiating the display unit with light, and a second module positioned below the first module and irradiating the display unit with light, wherein the first module and the second module may be detachably provided. The first module includes a first light guide plate, a first optical sheet disposed between the first light guide plate and a display unit, a first light source unit disposed on one side of the first light guide plate and irradiating light toward the first light guide plate, and a first frame coupled to the edge of the first light guide plate, wherein the first light source unit may be disposed in the first frame or in a first housing coupled to the first light guide plate and the first optical sheet.

Description

Technical Field

[0001] This specification relates to a display device, and more particularly to a display device provided inside a vehicle.

Background Art

[0002] The content described herein merely provides background information for this specification and does not constitute the prior art.

[0003] Entering the full-fledged information age, the field of display devices that visually display electrical information signals has been rapidly developing, and research has been continuously conducted to develop performance such as thinning, weight reduction, and low power consumption for various display devices.

[0004] Among these display devices, there are liquid crystal display devices (LCD), quantum dot display panel devices (QD), field emission display devices (FED), electro-wetting display devices (EWD), and organic light emitting display devices (OLED), etc.

[0005] Display devices have been developed to be miniaturized, portable for users to move around, or attached to mobile devices such as vehicles, and have been improved to be more conveniently utilized by users.

[0006] Also, display devices have been continuously improved to increase the screen resolution and brightness to provide users with clear images.

Summary of the Invention

Problems to be Solved by the Invention

[0007] The display devices installed in the vehicle provide convenience to the driver and the assistant seated next to the driver.

[0008] In recent years, display devices have been improved to offer a variable mode: a shared mode in which both the driver and the assistant can view the displayed image, and a personal mode in which a portion of the image in front of the assistant can be viewed only by the assistant, and not by the driver.

[0009] These functional modes are referred to as Switchable Privacy Modes (SPM). A portion of the overall screen of the vehicle display device may be provided with an SPM area to implement the SPM function.

[0010] In these SPM areas, a variable image that can only be seen by the assistant may be displayed. Whether the image in the SPM area is in a shared mode that can be seen by both the driver and the assistant, or in a personal mode that can only be seen by the assistant, may be selected by controlling the brightness of the light on the display unit on which the image is played.

[0011] In other words, if the brightness of the display is high, it may enter shared mode, and if the brightness of the display is low, it may enter personal mode.

[0012] Thus, multiple light sources may be provided in the display device to adjust the brightness of the display. By blinking some of the multiple light sources to adjust the brightness of the light in the display, the SPM area can be variably switched between shared mode and individual mode.

[0013] Multiple light sources may be arranged sequentially below the display unit on which the image is played. Although the multiple light sources are connected to each other, they need to be modularized and structured to be easily detachable from one another for the purpose of assembling the display device, switching between some of the multiple light sources, and maintaining the display device.

[0014] Furthermore, the light source may overheat due to light irradiation, and appropriate cooling is necessary to suppress overheating.

[0015] Therefore, an object of this specification is to provide a display comprising a plurality of modules, each having a light source and easily detachable from one another.

[0016] Furthermore, an object of this specification is to provide a display device having a structure that can be easily cooled.

[0017] The purposes of this specification are not limited to those mentioned above. Other purposes and advantages of this specification not mentioned can be understood from the following description and more clearly from the examples of this specification. Furthermore, it will be readily apparent that the purposes and advantages of this specification can be embodied by the means and combinations thereof set forth in the claims. [Means for solving the problem]

[0018] One embodiment of the display device includes a display unit, a first module positioned below the display unit and irradiating the display unit with light, and a second module positioned below the first module and irradiating the display unit with light, wherein the first module and the second module may be detachably provided.

[0019] The first module includes a first light guide plate, a first optical sheet disposed between the first light guide plate and a display unit, a first light source unit disposed on one side of the first light guide plate and irradiating light toward the first light guide plate, and a first frame coupled to the edge of the first light guide plate, wherein the first light source unit may be disposed in the first frame or in a first housing coupled to the first light guide plate and the first optical sheet.

[0020] The first frame may include a first part on one side that contacts a first optical sheet, and a second part that is coupled to the first part and on one side that contacts a first light guide plate.

[0021] The first frame is provided with one side open, and the first light guide plate and the first optical sheet can be inserted into and slid into the first frame through the open portion of the first frame, while coupled with the first housing, and coupled to the first frame.

[0022] The first frame is provided in the shape of a rectangle with a space formed inside, and the first light guide plate and the first optical sheet can be joined to the first frame by joining the first part and the second part.

[0023] The second module may include a first bottom cover with an open top, a second light guide plate housed in the first bottom cover, a second optical sheet positioned above the second light guide plate, a second light source unit positioned on one side of the second light guide plate and irradiating light toward the second light guide plate, and a first guide panel coupled to the first bottom cover and detachably coupled to the first module.

[0024] The second module may include a second bottom cover with an open top, a diffuser plate in which at least a portion is housed in the second bottom cover, a third optical sheet positioned above the diffuser plate, a third light source unit positioned below the diffuser plate and irradiating light toward the diffuser plate, and a second guide panel coupled to the second bottom cover and detachably coupled to the first module.

[0025] The first module includes a heat dissipation part disposed at a position adjacent to the first light source part in the first housing. The first light source part has a plurality of light sources arranged at intervals from each other, and the heat dissipation part may be arranged such that its longitudinal direction is parallel to the direction in which the plurality of light sources of the first light source part are arranged.

Advantages of the Invention

[0026] The display device according to this specification includes a first module and a second module each having a light source part, and the first module and the second module may be detachably provided.

[0027] Thus, since each light source part is modularized and can be easily detached from and attached to each other, the display device can be easily assembled, and the switching of some of the plurality of light source parts and the maintenance of the display device can also be facilitated.

[0028] Also, in the display device according to this specification, the first frame may be integrally formed and one side thereof may be open. The first light guide plate and the first optical sheet may be inserted into and slid in a groove formed in the first frame and stably attached to the first frame.

[0029] Also, in the display device according to this specification, the first frame is provided separately as a first part and a second part, and by combining or separating the first part and the second part, the first optical sheet and the first light guide plate can be easily detached from and attached to the first module.

[0030] With such a structure, the assembly and disassembly of the first module of the display device are facilitated, and the working time, cost, and labor can be effectively reduced.

[0031] Furthermore, in the display device according to this specification, the heat dissipation section may be arranged such that its longitudinal direction is parallel to the direction in which the multiple light sources of the first light source are arranged. With such a structure, when the first light source is heated by the emission of light from the multiple LEDs, the heat dissipation section can cool the first light source uniformly in the longitudinal direction, thereby effectively suppressing overheating of the first light source.

[0032] The effects described above, as well as the specific effects described herein, will be explained and described below in relation to the embodiments for carrying out the invention. [Brief explanation of the drawing]

[0033] [Figure 1] This is a perspective view showing a display device according to one embodiment.

[0034] [Figure 2] This is an exploded view showing a display device according to one embodiment.

[0035] [Figure 3] This is a cross-sectional view showing a part of a display device according to one embodiment.

[0036] [Figure 4] This is a perspective view showing the first frame according to one embodiment.

[0037] [Figure 5] Figure 4 shows the state in which the first light guide plate and the first optical sheet are sandwiched within the first frame shown.

[0038] [Figure 6] This diagram shows the first frame with the first light guide plate and the first optical sheet attached.

[0039] [Figure 7] This figure shows the state in which the first housing and heat dissipation section are further attached to the first housing shown in Figure 6.

[0040] [Figure 8] This is a perspective view showing some components of a display device equipped with a first frame according to another embodiment.

[0041] [Figure 9] Figure 8 is an exploded view.

[0042] [Figure 10] This is a cross-sectional view showing a part of the component shown in Figure 8.

[0043] [Figure 11] This is a cross-sectional view showing a part of a display device according to another embodiment.

[0044] [Figure 12] This is a cross-sectional view showing the structure with the heat dissipation section added, as shown in Figure 11.

[0045] [Figure 13] This diagram shows the heat dissipation section coupled to the first housing. [Modes for carrying out the invention]

[0046] The aforementioned objectives, features, and advantages will be described in detail below with reference to the accompanying drawings, so that a person with ordinary skill in the art to which this specification belongs can easily implement the technical concept of this specification. In describing this specification, if a specific description of known technology relating to this specification is deemed to obscure the gist of this specification, the detailed description will be omitted. Hereafter, preferred embodiments according to this specification will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0047] Although terms such as "first," "second," etc., are used to indicate various components, these components are not limited by these terms. These terms are simply used to distinguish one component from another, and unless otherwise specified, the first component may also be the second component.

[0048] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0049] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as “composed of” or “including” in this application should not be interpreted as necessarily including all of the multiple components or stages described in the specification, but rather as meaning that some of the components or stages may not be included, or that further components or stages may be included.

[0050] Throughout the specification, "A and / or B" means A, B, or A and B unless otherwise specified, and "C to D" means C or greater and D or less unless otherwise specified.

[0051] Furthermore, throughout the specification, when we refer to the upper side, lower side, or top and bottom, this refers to the direction relative to the cross-sectional view within the entire set of drawings.

[0052] Figure 1 is a perspective view showing a display device according to one embodiment. Figure 2 is an exploded view showing a display device according to one embodiment. Figure 3 is a cross-sectional view showing a part of a display device according to one embodiment.

[0053] A display device according to one embodiment may include a display unit 100, a first module 200, and a second module 300.

[0054] The display unit 100 can display video and images. In the following, the objects displayed on the display unit 100 can be a mix of video, images, and other visuals. A user is positioned in front of the display unit 100, and the user can obtain information necessary for driving and other desired information from the images displayed on the display unit 100.

[0055] The first module 200 is positioned below the display unit 100 and can illuminate the display unit 100 with light. The first module 200, including the first light source unit 230 that emits light, can illuminate the display unit 100.

[0056] The second module 300 is positioned below the first module 200 and can illuminate the display unit 100 with light. The second module 300 is provided separately from the first light source unit 230 and, together with the second light source unit 340 that illuminates the display unit 100, can illuminate the display unit 100.

[0057] The display unit 100 may include a shared area 101 and a variable personal area 102. The shared area 101 allows all users in front of the display unit 100 to view the displayed image. In a display device installed in a vehicle, the shared area 101 may be positioned close to the driver.

[0058] The variable personal area 102 can selectively display images to all users or only some users. The variable personal area 102 may be positioned close to an assistant sitting next to the driver. The area of ​​the shared area 101 may be larger than the area of ​​the variable personal area 102.

[0059] When the light source of the first module 200, i.e., the first light source unit 230, is turned on, the variable personal area 102 may be configured so that all users can view the displayed image, and when the light source of the first module 200, i.e., the first light source unit 230, is turned off, the variable personal area 102 may be configured so that only some users can view the displayed image.

[0060] The second light source unit 340 may remain lit while the display device is operating. Alternatively, by blinking the first light source unit 230 to adjust the brightness of the light of the display unit 100, the display unit 100 can operate in a shared mode where both the driver and the assistant can view the image, or in a personal mode where the image displayed in the variable personal area 102 can only be viewed by the assistant.

[0061] This utilizes the fact that if the brightness of the display unit 100 is appropriately low, a driver who views the variable personal area 102 at an angle will not be able to see the image displayed in the variable personal area 102.

[0062] To implement these SPM (Switchable Privacy Mode) functions, multiple light sources are required, some of which need to blink while the display device is operating.

[0063] The display device of the embodiment may include a first module 200 equipped with a first light source unit 230 and a second module 300 equipped with a second light source unit 340. Each light source unit may be modularized in this way, and these modules may be provided so as to be easily attached to and detached from one another.

[0064] Referring to Figure 3, the first module 200 in one embodiment may include a first light guide plate 210, a first optical sheet 220, a first light source unit 230, and a first frame 240.

[0065] The first light guide plate 210 can receive light emitted from the first light source unit 230. The light guide plate in this specification can convert the incident point light source into a face light source and emit it. The light emitted from the light source unit enters the light guide plate and undergoes repeated total internal reflection, diffuse reflection, refraction, and diffraction inside the light guide plate to be converted into a face light source with uniform brightness, which can then be emitted toward the display unit 100.

[0066] Light emitted from the first light source unit 230 enters the side surface of the first light guide plate 210, alters the optical path, and can be emitted toward the display unit 100 located above the first light guide plate 210.

[0067] The first optical sheet 220 may be placed between the first light guide plate 210 and the display unit 100. The optical sheet in this specification can diffuse the incident light and further uniformize the light density across the entire optical sheet before emission.

[0068] The light emitted from the first light guide plate 210 diffuses as it passes through the first optical sheet 220, and can be incident on the display unit 100 in the form of a highly uniform surface light source.

[0069] The first light source unit 230 is positioned on one side of the first light guide plate 210 and can irradiate light toward the first light guide plate 210. The light source unit in this specification may consist of an LED 11 that serves as a light source and a circuit board 12 on which the LED 11 is mounted. The first light source unit 230 may have a plurality of LEDs 11 arranged spaced apart from each other along one side edge of the first light guide plate 210, and these LEDs 11 may be mounted on the circuit board 12.

[0070] As mentioned above, in shared mode, the first light source unit 230 is turned on, and the brightness of the light from the display unit 100 becomes relatively higher, while in personal mode, the first light source unit 230 is turned off, and the brightness of the light from the display unit 100 may become relatively lower.

[0071] The first frame 240 can be coupled to the edge of the first light guide plate 210. The first light guide plate 210 and the first optical sheet 220 can be coupled to the first frame 240. The first frame 240 may have grooves formed therein for coupling the first light guide plate 210 and the first optical sheet 220, and these two components may be sandwiched in these grooves and assembled into a display device. The first frame 240 will be described in more detail below.

[0072] The display device of one embodiment may include a first housing 250 coupled to a first light guide plate 210 and a first optical sheet 220. The first housing 250 can be coupled to one side edge of the first light guide plate 210 and the first optical sheet 220. The first light source unit 230 may be located in the first housing 250.

[0073] The first housing 250 may include a first cell 251, a second cell 252, and a third cell 253. The first cell 251 may have one surface in contact with the first optical sheet 220 and may extend laterally from the first optical sheet 220.

[0074] The second cell 252 may have one surface in contact with the first light guide plate 210 and extend laterally to the first optical sheet 220. The third cell 253 may be bent from the first cell 251 and the second cell 252 to connect the first cell 251 and the second cell 252, and the first light source unit 230 may be arranged thereon.

[0075] The first light source unit 230 may be positioned inside the third cell 253 and bonded to the inner surface of the third cell 253 with an adhesive, such as an adhesive or double-sided tape. Thus, the first housing 250 may have a "U" shape with one side open and the other side closed by the first cell 251, the second cell 252, and the third cell 253.

[0076] The ends of the first light guide plate 210 and the first optical sheet 220 may be sandwiched in the space formed by the first housing 250. This allows the first light source unit 230 to be positioned on one side of the first light guide plate 210 and to irradiate light onto the side surface of the first light guide plate 210.

[0077] In one embodiment, the second module 300 may include a first bottom cover 310, a second light guide plate 320, a second optical sheet 330, a second light source unit 340, and a first guide panel 350.

[0078] The first bottom cover 310 is provided so as to be open at the top, and can form the outer shape of the second module 300. The first bottom cover 310 may house the second light guide plate 320, the second light source unit 340, and other components that make up the second module 300.

[0079] The second light guide plate 320 may be housed in the first bottom cover 310. The second light guide plate 320 is positioned below the first light guide plate 210 and can convert a point light source incident from the second light source unit 340 into a surface light source and emit light toward the first light guide plate 210 and the display unit 100.

[0080] Light emitted from the second light source unit 340 enters the side surface of the second light guide plate 320, changing the path of the light so that it can be emitted toward the first light guide plate 210 and the display unit 100 located above the second light guide plate 320.

[0081] The second optical sheet 330 is positioned above the second light guide plate 320, so that the light emitted from the second light guide plate 320 diffuses as it passes through the second optical sheet 330, becoming more uniform light that can then be emitted towards the display unit 100.

[0082] The second light source unit 340 is positioned on one side of the second light guide plate 320 and can irradiate light toward the second light guide plate 320. The second light source unit 340 may include a circuit board 12 on which the LEDs 11 are mounted, with a plurality of LEDs 11, which are light sources, arranged spaced apart from each other along one side edge of the second light guide plate 320.

[0083] The first bottom cover 310 is bent at its end to form a space for housing the second light guide plate 320 and the second optical sheet 330, and the substrate of the second light source unit 340 may be bonded to the inner surface at the bent portion of the first bottom cover 310.

[0084] On the other hand, in order to reduce the size of the first bottom cover 310, grooves may be formed on one side of the second light guide plate 320, and the LEDs 11 of the second light source unit 340 may be inserted into these grooves. However, the arrangement structure of the second light guide plate 320 and the second light source unit 340 may be similar to the arrangement structure of the first light guide plate 210 and the first light source unit 230 in the first module 200 described above.

[0085] The first guide panel 350 can be coupled to the first bottom cover 310 and detachably coupled to the first module 200. The first guide panel 350 can be detachably coupled to the first housing 250 of the first module 200. Therefore, the first guide panel 350 may be positioned in the second module 300 in a location corresponding to the first housing 250 of the first module 200.

[0086] With such a structure, the first module 200 and the second module 300 may be detachably provided. For example, the first guide panel 350 and the first housing 250 may be bonded together with an adhesive, such as an adhesive or double-sided tape, that has sufficient adhesive strength to allow for easy attachment and detachment.

[0087] In this embodiment, the display device comprises a first module 200 and a second module 300, each having a light source, and the first module 200 and the second module 300 may be detachably provided.

[0088] In this way, each light source unit is modularized and can be easily attached to and detached from one another, making it easy to assemble the display device, and also making it easier to switch between some of the multiple light sources and to maintain the display device.

[0089] The first guide panel 350 may include a first-first piece 351, a first-second piece 352, and a coupling projection 353. The first-first piece 351 extends laterally and can be coupled to the upper end of the first bottom cover 310. The first-first piece 351 extends laterally from the first guide panel 350 to prevent the second optical sheet 330 and the second light guide plate 320 from detaching from the first bottom cover 310.

[0090] The first-second piece 352 may extend vertically and be coupled to the side of the first bottom cover 310, and positioned between the first bottom cover 310 and the second housing 360. The first-second piece 352 can be bent with respect to the first-first piece 351 and bonded to the bent side of the first bottom cover 310 by an adhesive member.

[0091] The first and second pieces 352 are sandwiched in the space formed between the bent portion of the first bottom cover 310 and the bent portion of the second housing 360, and can be bonded to the bent portion of the second housing 360 to stably connect to the second module 300.

[0092] The connecting projection 353 protrudes upward, allowing the first module 200 to be connected. The connecting projection 353 protrudes upward at the point where the 1-1 piece 351 and the 1-2 piece 352 intersect, and the first housing 250 of the first module 200 may be placed on its upper surface.

[0093] The upper surface of the connecting projection 353 and the lower surface of the first housing 250 can be joined to each other by an adhesive member. In this case, as described above, the connecting projection 353 and the first housing 250 are bonded to each other by an adhesive member having appropriate adhesive strength, so they can be joined to each other in a detachable manner.

[0094] The second module 300 may include a second housing 360 and a first reflective sheet 370. The second housing 360 is in contact with the lower surface of the first bottom cover 310 and can accommodate at least a portion of the first guide panel 350.

[0095] The second housing 360 forms part of the outer shape of the second module 300, surrounds the edge of the first bottom cover 310 and the side of the first guide panel 350, and can reinforce the connection between the first bottom cover 310 and the first guide panel 350.

[0096] The first reflective sheet 370 may be positioned below the second light guide plate 320 and housed in the first bottom cover 310. The first reflective sheet 370 reflects the light emitted from the lower surface of the second light guide plate 320 and causes it to enter the second light guide plate 320 again, thereby directing most of the light from the second light guide plate 320 towards the display unit 100 and improving the light efficiency in the second module 300.

[0097] The second optical sheet 330 may include a diffusion sheet 331, a prism sheet 332, and a protective sheet 333. The diffusion sheet 331 is positioned above the second light guide plate 320 and can diffuse the light. Light that passes through the diffusion sheet 331 can be diffused to become even more uniform light.

[0098] The prism sheet 332 is positioned above the diffusion sheet 331, which can improve the straight-line propagation of light. Because the prism sheet 332 has a prism structure, it can partially focus the light that enters after passing through the diffusion sheet 331, thereby improving the straight-line propagation of light.

[0099] The protective sheet 333 may be placed above the prism sheet 332. The protective sheet 333 can protect the diffusion sheet 331 and the prism sheet 332 from damage by external foreign objects or scratches.

[0100] On the other hand, the first optical sheet 220 and the third optical sheet 313 may also be provided with a structure in which a diffusion sheet 331, a prism sheet 332, and a protective sheet 333 are sequentially stacked in the order in which light passes through them, similar to the second optical sheet 330.

[0101] Figure 4 is a perspective view showing a first frame 240 according to one embodiment. Figure 5 is a diagram showing the state in which the first light guide plate 210 and the first optical sheet 220 are sandwiched in the first frame 240 shown in Figure 4.

[0102] As shown in Figure 4, the first frame 240 may be formed in a "U" shape in cross-section, with grooves formed on the inside. The edges of the first light guide plate 210 and the first optical sheet 220 are sandwiched in these grooves, and in this way the first light guide plate 210 and the first optical sheet 220 can be stably bonded to the first frame 240.

[0103] The first frame 240 may be provided with one side open. The first light guide plate 210 and the first optical sheet 220 can be inserted into and slid into the first frame 240 through the open portion of the first frame 240 while coupled with the first housing 250, and thus coupled to the first frame 240.

[0104] Referring to Figure 5, the first light guide plate 210 and the first optical sheet 220 may be sandwiched in a groove formed in the first frame 240 through an open portion on one side of the first frame 240.

[0105] The first frame 240 may be provided with a structure in which a pair of relatively long bars and a single relatively short bar are joined together. In this case, the pair of long bars, spaced apart from each other, may be sandwiched between the edges of the first light guide plate 210 and the first optical sheet 220.

[0106] Figure 6 shows the state in which the first light guide plate 210 and the first optical sheet 220 are attached to the first frame 240. Figure 7 shows the state in which the first housing 250 and the heat dissipation unit 260 are further attached to the first frame 240. The heat dissipation unit 260 shown in Figure 7 will be described in detail below.

[0107] Referring to Figure 6, the first light guide plate 210 and the first optical sheet 220 can be slid relative to the first frame 240 while inserted into the first frame 240, and can be fully coupled to the first frame 240.

[0108] Next, as shown in Figure 7, after the first light guide plate 210 and the first optical sheet 220 are fully coupled to the first frame 240, the first housing 250 may be sandwiched between the first light guide plate 210 and the first optical sheet 220 through the open portion of the first frame 240. In this way, the first light source unit 230, which is located in the first housing 250, may be positioned to face one side of the first light guide plate 210.

[0109] In this embodiment, the first frame 240 may be integrally formed and open on one side. The first light guide plate 210 and the first optical sheet 220 may be inserted into grooves formed in the first frame 240 and slid to be stably attached to the first frame 240.

[0110] This structure facilitates the assembly and disassembly of the first module 200 of the display device, effectively reducing working time, costs, and labor.

[0111] Figure 8 is a perspective view showing some components of a display device with a first frame 240 according to another embodiment. Figure 9 is an exploded view of Figure 8. Figure 10 is a cross-sectional view showing some of the components shown in Figure 8. In such a structure, the first light source unit 230 can be coupled to the first frame 240, specifically to the second part 242.

[0112] The first frame 240 includes a first part 241 and a second part 242, the first part 241 and the second part 242 may be provided separately. The first light guide plate 210 and the first optical sheet 220 may be attached to the first module 200 by coupling the first part 241 and the second part 242 with each other.

[0113] The first part 241 has one surface in contact with the first optical sheet 220, allowing the first optical sheet 220 to be attached to the first module 200. The second part 242 is coupled with the first part 241, and has one surface in contact with the first light guide plate 210, allowing the first light guide plate 210 to be attached to the first module 200.

[0114] Referring to Figure 10, the first part 241 may include a first-first part 2411 and a first-second part 2412. The first optical sheet 220 can be bonded to the first-first part 2411. The first-second part 2412 can be folded from one end of the first-first part 2411 and bonded to the second part 242.

[0115] The first optical sheet 220 may be attached to the first module 200 by the first-1 part 2411 contacting the upper surface of the first optical sheet 220 and the first-2 part 2412 coupling with the second part 242.

[0116] The second part 242 may include the second-first part 2421 and the second-second part 2422. The first light guide plate 210 can be coupled to the second-first part 2421. The second-second part 2422 may be bent from one end of the second-first part 2421 and coupled to the first-second part 2412, and the first light source unit 230 may be arranged thereon.

[0117] The light guide plate may be attached to the first module 200 by the second-first part 2421 contacting the lower surface of the first light guide plate 210 and the second-second part 2422 coupling with the first-second part 2412.

[0118] Adhesive members may be provided at the portions where the first-second part 2412 and the second-second part 2422 face each other and come into contact, thereby bonding the first-second part 2412 and the second-second part 2422 together.

[0119] As shown in Figure 10, since the first-second part 2412 is positioned on the outside and the second-second part 2422 is positioned on the inside, the first light source unit 230 may be attached to the inner surface of the second-second part 2422 by an adhesive member and placed in the second part 242.

[0120] In another embodiment, the second-second part 2422 may be positioned on the outside and the first-second part 2412 on the inside, with the first light source 230 being bonded to the inner surface of the second-first part 2421 by an adhesive member and positioned in the second part 242.

[0121] The first frame 240 may be provided in the form of a rectangle with space formed inside. By joining the first part 241 and the second part 242, the first light guide plate 210 and the first optical sheet 220 can be joined to the first frame 240.

[0122] The first frame 240 is coupled to the edges of the rectangular first light guide plate 210 and the first optical sheet 220, allowing the first light guide plate 210 and the first optical sheet 220 to be stably attached to the first module 200.

[0123] In this embodiment, the first frame 240 is provided separately as a first part 241 and a second part 242, and the first optical sheet 220 and the first light guide plate 210 can be easily attached to and detached from the first module 200 by joining or separating the first part 241 and the second part 242.

[0124] Figure 11 is a cross-sectional view showing a part of a display device according to another embodiment. The first module 200 in Figure 11 is shown as one embodiment, but it is clear that it may be replaced with other embodiments of the first module 200 described above.

[0125] Furthermore, although Figure 11 shows a second guide panel 315, it is clear that the second guide panel 315 may be replaced with the first guide panel 350 mentioned above.

[0126] Referring to Figure 11, the second module 300 in other embodiments may include a second bottom cover 311, a diffuser plate 312, a third optical sheet 313, a third light source unit 314, and a second guide panel 315. The second bottom cover 311 is provided so as to be open at the top and can form the outer shape of the second module 300. The second bottom cover 311 may house the diffuser plate 312, the third light source unit 314, and other components that make up the second module 300.

[0127] The second bottom cover 311 may have a stepped surface 3111 on which the edge portion of the diffuser plate 312 is placed. Alternatively, the folded end portion of the second reflective sheet 316 may be placed on the stepped surface 3111.

[0128] The diffuser plate 312 may be partially housed in the second bottom cover 311. The diffuser plate 312 is positioned above the third light source unit 314, so that light emitted from the third light source unit 314 can pass through the diffuser plate 312.

[0129] The diffuser plate 312 can diffuse light, changing a point light source into a surface light source and improving the uniformity of the light. Light that has passed through the diffuser plate 312 can be incident on the third optical sheet 313.

[0130] The third optical sheet 313 may be positioned above the diffuser plate 312. The light emitted from the diffuser plate 312 is further diffused as it passes through the third optical sheet 313, allowing it to be incident on the display unit 100 in the form of a more uniform surface light source.

[0131] The third light source unit 314 is positioned below the diffuser plate 312 and can irradiate light toward the diffuser plate 312. The light emitted from the third light source unit 314 travels upward and enters the diffuser plate 312, thus becoming a surface light source.

[0132] The third light source unit 314 may include a plurality of LEDs 11 arranged with spacing between them in the horizontal and vertical directions on a plane perpendicular to the vertical direction in Figure 11, and a circuit board 12 on which the LEDs 11 are mounted.

[0133] The second guide panel 315 can be coupled to the second bottom cover 311 and detachably coupled to the first module 200. As described above for the first guide panel 350, the second guide panel 315 and the first module 200 may be bonded together by an adhesive member having appropriate adhesive strength.

[0134] The second guide panel 315 can be detachably coupled to the first housing 250 of the first module 200. Therefore, the second guide panel 315 may be positioned in the second module 300 at a location corresponding to the first housing 250 of the first module 200.

[0135] The second guide panel 315 may include a second-first piece 3151 and a second-second piece 3152. The second-first piece 3151 extends laterally and can be coupled to the upper end of the second bottom cover 311 and to the first module 200.

[0136] The second-first piece 3151 extends laterally from the second guide panel 315 to prevent the diffuser plate 312 and the third optical sheet 313 from detaching from the second bottom cover 311.

[0137] The second-second piece 3152 is bent from the second-first piece 3151 and extends vertically, positioned outside the side of the second bottom cover 311, and can be bonded to the side of the second bottom cover 311. The second-second piece 3152 can be bent relative to the second-first piece 3151 and bonded to the bent side of the second bottom cover 311 by an adhesive member.

[0138] The first housing 250 of the first module 200 is placed on the upper surface of the second-first piece 3151, and the upper surface of the second-first piece 3151 and the lower surface of the first housing 250 are bonded to each other by an adhesive member having appropriate adhesive strength, so that the second-first piece 3151 and the first housing 250 can be detachably joined to each other. In this way, the first module 200 and the second module 300 can be detachably joined to each other.

[0139] On the other hand, the second module 300 may include a second reflective sheet 316 coupled to the third light source unit 314, which reflects the light emitted from the third light source unit 314 toward the diffuser plate 312. The second reflective sheet 316 can improve the efficiency of light in the second module 300 by reflecting the light toward the second bottom cover 311 toward the diffuser plate 312.

[0140] The second reflective sheet 316 may be placed on the upper surface of the circuit board 12. However, if the other structures of the circuit configuration on the upper surface of the circuit board 12 are complex, it may be placed on the lower surface of the circuit board 12.

[0141] Figure 12 is a cross-sectional view showing the structure with the heat dissipation section 260 added, as in Figure 11. Figure 13 shows the state in which the heat dissipation section 260 is coupled to the first housing 250.

[0142] When the LED 11 located in the first module 200 is activated, the first light source unit 230 may overheat. Therefore, the display device of the embodiment may include a heat dissipation unit 260 to suppress overheating of the first light source unit 230.

[0143] The first module 200 may include a heat dissipation section 260 positioned adjacent to the first light source section 230 in the first housing 250. The heat dissipation section 260 may include heat dissipation fins 261 and a holder 262.

[0144] The heat dissipation fins 261 may be provided with multiple protrusions and grooves to increase the contact area with the outside air. The holder 262 is provided with a "U" shaped cross-section, and the heat dissipation fins 261 are attached to the groove portion. The holder itself can be connected to the first housing 250 by adhesive members or fasteners such as screws.

[0145] As shown in Figure 13, the first light source unit 230 may consist of multiple light sources arranged at a distance from each other. That is, the first light source unit 230 may consist of multiple LEDs 11 arranged at regular intervals in the longitudinal direction of the first housing 250.

[0146] Referring to Figure 13, the first housing 250 may be provided with side cells 254 on both sides that contact the sides of the first light guide plate 210 and the second optical sheet 330 to prevent the first light guide plate 210 and the second optical sheet 330 from moving. The heat dissipation section 260 may be arranged in the longitudinal direction of the first housing 250 between a pair of spaced-apart side cells 254.

[0147] In response to this, the heat dissipation section 260 may be arranged such that its longitudinal direction is parallel to the direction in which the multiple light sources of the first light source section 230 are arranged. With this structure, when the first light source section 230 is heated by the emission of light from the multiple LEDs 11, the heat dissipation section 260 can uniformly cool the first light source section 230 in the longitudinal direction, thereby effectively suppressing overheating of the first light source section 230.

[0148] A display device according to one embodiment includes a display unit, a first module disposed below the display unit and irradiating the display unit with light, and a second module disposed below the first module and irradiating the display unit with light, wherein the first module and the second module may be detachably provided.

[0149] The display unit includes a shared area where all users in front of the display unit can view the displayed image, and a variable personal area where only all or some users can selectively view the displayed image. The variable personal area may be configured such that when the light source of the first module is on, all users can view the displayed image, and when the light source of the first module is off, only some users can view the displayed image.

[0150] The first module includes a first light guide plate, a first optical sheet disposed between the first light guide plate and the display unit, a first light source unit disposed on one side of the first light guide plate and irradiating light toward the first light guide plate, and a first frame coupled to the edge of the first light guide plate, wherein the first light source unit may be disposed in the first frame or in a first housing coupled to the first light guide plate and the first optical sheet.

[0151] The first module may include a heat dissipation section located adjacent to the first light source section in the first housing.

[0152] The first light source unit may consist of multiple light sources arranged at a distance from each other, and the heat dissipation unit may be arranged such that its longitudinal direction is parallel to the direction in which the multiple light sources of the first light source unit are arranged.

[0153] The first housing may include a first cell with one surface in contact with the first optical sheet, a second cell with one surface in contact with the first light guide plate, and a third cell that is bent from the first and second cells to connect the first and second cells and on which the first light source unit is arranged.

[0154] The first frame may include a first part on one side that contacts the first optical sheet, and a second part that is coupled to the first part and on one side that contacts the first light guide plate.

[0155] The first part may include a 1-1 part to which the first optical sheet is attached, and a 1-2 part that is bent from one end of the 1-1 part and attached to the second part, and the second part may include a 2-1 part to which the first light guide plate is attached, and a 2-2 part that is bent from one end of the 2-1 part and attached to the 1-2 part, and to which the first light source is arranged.

[0156] The first frame is provided such that one side is open, and the first light guide plate and the first optical sheet can be inserted into and slid into the first frame through the open portion of the first frame while coupled to the first housing, thereby coupling to the first frame.

[0157] The first frame is provided in the shape of a rectangle with a space formed inside, and the first light guide plate and the first optical sheet can be joined to the first frame by joining the first part and the second part.

[0158] The second module may include a first bottom cover with an open top, a second light guide plate housed in the first bottom cover, a second optical sheet positioned above the second light guide plate, a second light source unit positioned on one side of the second light guide plate and irradiating light toward the second light guide plate, and a first guide panel coupled to the first bottom cover and detachably coupled to the first module.

[0159] The second module may include a second housing that contacts the lower surface of the first bottom cover and accommodates at least a portion of the first guide panel, and a first reflective sheet that is positioned below the second light guide plate and is housed in the first bottom cover.

[0160] The first guide panel may include a first-first piece extending laterally and coupled to the upper end of the first bottom cover, a first-second piece extending vertically and coupled to the side of the first bottom cover and positioned between the first bottom cover and the second housing, and a coupling projection projecting upward, to which the first module is coupled.

[0161] The second optical sheet may include a diffusion sheet disposed above the second light guide plate to diffuse light, a prism sheet disposed above the diffusion sheet to improve the straightness of light propagation, and a protective sheet disposed above the prism sheet.

[0162] The second module may include a second bottom cover with an open top, a diffuser plate in which at least a portion is housed in the second bottom cover, a third optical sheet positioned above the diffuser plate, a third light source unit positioned below the diffuser plate and irradiating light toward the diffuser plate, and a second guide panel coupled to the second bottom cover and detachably coupled to the first module.

[0163] The second module may include a second reflective sheet coupled to the third light source, which reflects the light emitted from the third light source towards the diffuser plate.

[0164] The second guide panel may include a 2-1 piece extending laterally and coupled to the upper end of the bottom cover and to the first module, and a 2-2 piece that is bent from the 2-1 piece and extends vertically, positioned outside the side surface of the bottom cover and coupled to the side surface of the bottom cover.

[0165] As described above, this specification has been explained with reference to the illustrative drawings, but it is clear that this specification is not limited to the embodiments and drawings disclosed herein, and that various modifications can be made by a person of the ordinary skill within the scope of the technical concept of this specification. Furthermore, even if the effects of the configuration described herein are not explicitly stated and explained in the embodiments described above, it is natural that the effects that can be predicted by such configuration should also be recognized.

Claims

1. Display unit; A first module is positioned below the display unit and irradiates the display unit with light, A second module is positioned below the first module and irradiates the display section with light, Includes, The first module and the second module are detachably provided, Display device.

2. The aforementioned display unit is A shared area in front of the aforementioned display unit where all users can view the displayed image, A variable personal area that allows users to selectively view images that are displayed only to all or some users, Includes, When the light source of the first module is turned on, the variable personal area is configured so that all users can view the displayed image, and when the light source of the first module is turned off, the variable personal area is configured so that only some users can view the displayed image. The display device according to claim 1.

3. The first module is, First light guide plate and A first optical sheet is disposed between the first light guide plate and the display unit, A first light source unit is positioned on one side of the first light guide plate and irradiates light toward the first light guide plate, A first frame coupled to the edge of the first light guide plate, Includes, The first light source unit is arranged in a first housing which is coupled to the first frame or the first light guide plate and the first optical sheet. The display device according to claim 1.

4. The first module is, The first housing includes a heat dissipation section positioned adjacent to the first light source section, The display device according to claim 3.

5. The first light source unit comprises multiple light sources arranged at a distance from each other, and the heat dissipation unit is positioned such that its longitudinal direction is parallel to the direction in which the multiple light sources of the first light source unit are arranged. The display device according to claim 4.

6. The first housing is, A first cell having one surface in contact with the first optical sheet, A second cell having one surface in contact with the first light guide plate, A third cell is formed by bending the first and second cells to connect the first and second cells, and the first light source is arranged in the third cell, including, The display device according to claim 3.

7. The first frame mentioned above is, A first part having one surface in contact with the first optical sheet, A second part is coupled to the first part, with one surface in contact with the first light guide plate, including, The display device according to claim 3.

8. The first part of the above is, The first optical sheet is joined to the first-first part, A first-second part is bent from one end of the first-first part and joins with the second part, Includes, The second part of the above is, The second-first part to which the first light guide plate is connected, The second-second part is bent from one end of the second-first part and joined to the first-second part, and the first light source is arranged on the second-second part, including, The display device according to claim 7.

9. The first frame is provided such that one side is open, The first light guide plate and the first optical sheet, while coupled to the first housing, are inserted into and slid into the first frame through an open portion of the first frame, and coupled to the first frame. The display device according to claim 6.

10. The first frame is provided in the shape of a rectangle with a space formed inside, By joining the first part and the second part, the first light guide plate and the first optical sheet are joined to the first frame. The display device according to claim 7.

11. The second module is, The first bottom cover has an open top, The second light guide plate housed in the first bottom cover, A second optical sheet positioned above the second light guide plate, A second light source unit is positioned on one side of the second light guide plate and irradiates light toward the second light guide plate, A first guide panel is coupled to the first bottom cover and is detachably coupled to the first module, including, The display device according to claim 3.

12. The second module is, A second housing that contacts the lower surface of the first bottom cover and accommodates at least a portion of the first guide panel, A first reflective sheet is positioned below the second light guide plate and housed in the first bottom cover, including, The display device according to claim 11.

13. The first guide panel is, A first-first piece extending laterally and coupled to the upper end of the first bottom cover, A first-to-second piece extending vertically, coupled to the side surface of the first bottom cover, and positioned between the first bottom cover and the second housing, A coupling projection that protrudes upward and to which the first module is coupled, including, The display device according to claim 12.

14. The second optical sheet is A diffusion sheet is positioned above the second light guide plate to diffuse the light, A prism sheet is positioned above the diffusion sheet to improve the straight-line propagation of light, A protective sheet is placed above the prism sheet, including, The display device according to claim 11.

15. The second module is, The second bottom cover has an open top, A diffuser plate, at least a portion of which is housed in the second bottom cover, A third optical sheet is positioned above the diffuser plate, A third light source unit is positioned below the diffuser plate and irradiates light toward the diffuser plate, A second guide panel is coupled to the second bottom cover and is detachably coupled to the first module, including, The display device according to claim 3.

16. The second module is, The system includes a second reflective sheet coupled to the third light source, which reflects the light emitted from the third light source so that it is directed toward the diffuser plate. The display device according to claim 15.

17. The second guide panel is, A second-first piece extending laterally, coupled to the upper end of the second bottom cover and coupled to the first module, A second-second piece is bent from the second-first piece and extends vertically, positioned outside the side surface of the second bottom cover, and coupled to the side surface of the second bottom cover, including, The display device according to claim 16.

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