Display apparatus

Abstract

An embodiment of a display apparatus comprises: a display unit; a first module which is disposed below the display unit and irradiates light to the display unit; and a second module which is disposed

Description

display device

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

[0002] The material described in this section merely provides background information for the present specification and does not constitute prior art.

[0003] As we enter the full-fledged information age, the field of display devices that visually display electrical information signals is rapidly developing, and research is continuing to develop various display devices with thinner, lighter, and lower power consumption performance.

[0004] Examples of such display devices include 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).

[0005] Display devices are being developed to be miniaturized so that users can carry them around or install them in moving devices such as vehicles, and are being improved to make them more convenient for users.

[0006] Additionally, display devices are continuously being improved to provide users with clearer images by increasing the resolution and brightness of the screen.

[0007] The display device installed in the vehicle provides convenience to the driver and the passenger sitting next to the driver.

[0008] Recently, display devices have been improved to provide a variable mode in which both the driver and assistant can view the displayed image, and a private mode in which the image is provided in a certain area in front of the assistant that only the assistant can see and the driver cannot see.

[0009] This functional mode is called Switchable Privacy Mode (SPM). A portion of the full screen of a vehicle display device may be provided with an SPM area to implement SPM functionality.

[0010] In this SPM area, images that are only visible to the assistant can be displayed variably. Whether the image in the SPM area is displayed in a shared mode for both the driver and assistant, or in a private mode for only the assistant, can be selected by controlling the brightness of the display unit where the image is played.

[0011] That is, if the brightness of the light in the display section is high, it can be a public mode, and if the brightness of the light in the display section is low, it can be a private mode.

[0012] To control the brightness of the display unit in this way, a plurality of light sources may be provided in the display device. By controlling the brightness of the light of the display unit by blinking some of the plurality of light sources, the SPM area can be variably switched between a public mode and a private mode.

[0013] A plurality of light source units can be sequentially arranged on the lower side of the display unit where the image is played. The plurality of light source units are connected to each other. In order to assemble the display device, replace some of the plurality of light source units, and maintain and repair the display device, it is necessary to structure the plurality of light source units so that they can be easily connected and disconnected by modularizing them.

[0014] Additionally, the light source may overheat due to light irradiation, and appropriate cooling is required to prevent overheating.

[0015] Accordingly, the purpose of the present specification is to provide a display having a plurality of modules, each having a light source unit, which are easily detachable from each other.

[0016] Another object of the present 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 herein can be understood through the following description and will be more clearly understood through the embodiments of this specification. Furthermore, it will be readily apparent that the purposes and advantages of this specification can be realized by the means and combinations thereof set forth in the claims.

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

[0019] 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 an edge of the first light guide plate, wherein the first light source unit can be disposed in the first frame or a first housing coupled to the first light guide plate and the first optical sheet.

[0020] The first frame may include a first part having one surface in contact with the first optical sheet; and a second part coupled to the first part and having one surface in contact with the first light guide plate.

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

[0022] The first frame is provided in the shape of a square with a space formed on the inside, and by combining the first part and the second part, the first light guide plate and the first optical sheet can be combined with the first frame.

[0023] The second module may include a first bottom cover having an open top; a second light guide plate accommodated in the first bottom cover; a second optical sheet disposed above the second light guide plate; a second light source unit disposed 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 having an open upper portion; a diffuser plate at least partially accommodated in the second bottom cover; a third optical sheet disposed above the diffuser plate; a third light source unit disposed 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 unit arranged adjacent to the first light source unit in the first housing, and the first light source unit may have a plurality of light sources arranged spaced apart from each other, and the heat dissipation unit may be arranged such that its length direction is parallel to the direction in which the plurality of light sources of the first light source unit are arranged.

[0026] A display device according to this specification comprises a first module and a second module, each having a light source unit, and the first module and the second module may be provided to be detachable.

[0027] Since each light source unit is modularized and easily detachable from each other, the display device can be easily assembled, and replacement of some of the multiple light source units, as well as maintenance and repair of the display device, can also be facilitated.

[0028] In addition, in the display device according to the present specification, the first frame may be formed integrally and may have one side open. The first light guide plate and the first optical sheet may be inserted into a groove formed in the first frame and slidably mounted on the first frame.

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

[0030] Due to this structure, the assembly and disassembly of the first module of the display device becomes easy, and work time, cost, and effort can be effectively reduced.

[0031] Additionally, in the display device according to the present specification, the heat dissipation unit 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 unit are arranged. Due to this structure, when the first light source unit is heated due to the emission of the plurality of LEDs, the heat dissipation unit can effectively suppress overheating of the first light source unit by uniformly cooling the first light source unit in the longitudinal direction.

[0032] In addition to the effects described above, the specific effects of this specification are described together with specific matters for implementing the specification below.

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

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

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

[0036] Fig. 4 is a perspective view showing a first frame according to an embodiment.

[0037] FIG. 5 is a drawing showing a state in which the first light guide plate and the first optical sheet are fitted into the first frame illustrated in FIG. 4.

[0038] Figure 6 is a drawing showing a state in which the first light guide plate and the first optical sheet are mounted on the first frame.

[0039] Figure 7 is a drawing showing a state in which the first housing and the heat dissipation part are additionally installed in Figure 6.

[0040] Fig. 8 is a perspective view showing some components of a display device having a first frame according to another embodiment.

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

[0042] Fig. 10 is a cross-sectional view showing a part of the component illustrated in Fig. 8.

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

[0044] Fig. 12 is a cross-sectional view showing a structure with a heat dissipation part added to Fig. 11.

[0045] Figure 13 is a drawing showing a state in which a heat dissipation part is connected to the first housing.

[0046] The above-described objects, features, and advantages are described in detail below with reference to the attached drawings, so that those skilled in the art to which this specification pertains can easily implement the technical ideas of this specification. In describing this specification, if a detailed description of a known technology related to this specification is judged to unnecessarily obscure the gist of this specification, a detailed description thereof will be omitted. Hereinafter, preferred embodiments according to this specification will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0047] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

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

[0049] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0050] Throughout the specification, when we refer to "A and / or B", this means A, B, or A and B, unless otherwise stated, and when we refer to "C through D", this means C or more and D or less, unless otherwise stated.

[0051] Also, when referring to the upper, lower, and upper and lower sides throughout the specification, this refers to the direction based on the cross-section of the entire drawing.

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

[0053] A display device according to an 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 used interchangeably as video, image, or picture. A user is positioned in front of the display unit (100), and the user can obtain driving-related information and other desired information from the images displayed on the display unit (100).

[0055] The first module (200) is positioned on the lower side of the display unit (100) and can irradiate light to the display unit (100). The first module (200) includes a first light source unit (230) that irradiates light and can illuminate the display unit (100).

[0056] The second module (300) is positioned below the first module (200) and can irradiate light to the display unit (100). The second module (300) is provided separately from the first light source unit (230) and includes a second light source unit (340) that irradiates light and can illuminate the display unit (100).

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

[0058] The variable private area (102) can optionally display images to all or only some users. The variable private area (102) can be positioned close to the driver's assistant. The area of ​​the public area (101) may be larger than that of the variable private 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) can be provided 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) can be provided so that only some users can view the displayed image.

[0060] While the display device is operating, the second light source unit (340) can always be turned on. Meanwhile, by controlling the brightness of the light of the display unit (100) by blinking the first light source unit (230), the display unit (100) can operate in a public mode where both the driver and the assistant can view the image, or in a private mode where only the assistant can view the image displayed in the variable private area (102).

[0061] This is because, if the brightness of the display unit (100) is appropriately low, a driver looking at the variable personal area (102) in a slanted diagonal direction cannot see the image displayed on the variable personal area (102).

[0062] Implementing this Switchable Privacy Mode (SPM) feature requires multiple light sources, some of which need to be blinking while the display device is operating.

[0063] The display device of the embodiment may include a first module (200) having a first light source unit (230) and a second module (300) having a second light source unit (340). Each light source unit may be modularized in this manner, and these modules may be provided so as to be easily detachable from each other.

[0064] Referring to FIG. 3, the first module (200) of 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 irradiated from the first light source unit (230). In the specification, the light guide plate can change the incident point light source into a surface light source and emit the light. The light irradiated from the light source unit enters the light guide plate and is changed into a surface light source with uniform brightness through repeated total reflection, diffuse reflection, refraction, and diffraction inside the light guide plate, and can be emitted toward the display unit (100).

[0066] The light irradiated from the first light source (230) is incident on the side of the first light guide plate (210) and the light path is changed so that it can be emitted toward the display unit (100) located on the upper side of 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). In the specification, the optical sheet may diffuse incident light to make the density of light more uniform throughout the entire optical sheet and emit the light.

[0068] The light emitted from the first light guide plate (210) is diffused as it passes through the first optical sheet (220) and can enter the display unit (100) in the form of a surface light source with high uniformity.

[0069] The first light source unit (230) is arranged on one side of the first light guide plate (210) and can irradiate light toward the first light guide plate (210). In the specification, the light source unit may be provided with 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 be arranged such that a plurality of LEDs (11) are spaced apart from each other along one edge of the first light guide plate (210), and these LEDs (11) may be mounted on the circuit board (12).

[0070] As described above, in the public mode, the first light source unit (230) is turned on, so that the light brightness of the display unit (100) is relatively high, and in the private mode, the first light source unit (230) is turned off, so that the light brightness of the display unit (100) is relatively low.

[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) has a groove formed into which the first light guide plate (210) and the first optical sheet (220) are coupled, so that the first light guide plate (210) and the first optical sheet (220) can be fitted into the groove and assembled into a display device. The first frame (240) will be described in more detail later.

[0072] A 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) may be coupled to one edge of the first light guide plate (210) and the first optical sheet (220). A first light source unit (230) may be disposed 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 of the first optical sheet (220).

[0074] The second cell (252) may have one surface in contact with the first light guide plate (210) and may extend in the lateral direction of 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) is placed inside the third cell (253) and can be bonded to the inner surface of the third cell (253) using an adhesive, double-sided tape, or other adhesive material. In this way, the first housing (250) can have a "U" shape with one side open and one 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) can be fitted into the space formed by the first housing (250). Accordingly, the first light source unit (230) can be placed on one side of the first light guide plate (210) to irradiate light onto the side surface of the first light source unit (230).

[0077] The second module (300) of one embodiment 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 that the upper part is open and can form the outer shape of the second module (300). The first bottom cover (310) can accommodate components constituting the second module (300), including the second light guide plate (320) and the second light source unit (340).

[0079] The second light guide plate (320) can be accommodated 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] The light irradiated from the second light source (340) is incident on the side of the second light guide plate (320) and the light path is changed so that it can be emitted toward the first light guide plate (210) and the display unit (100) located on the upper side of the second light guide plate (320).

[0081] The second optical sheet (330) is placed above the second light guide plate (320), and the light emitted from the second light guide plate (320) is diffused as it passes through the second optical sheet (330) to become more uniform light and can be emitted toward the display unit (100).

[0082] The second light source unit (340) is arranged 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 be provided with a plurality of LEDs (11) as light sources arranged along one edge of the second light guide plate (320) at intervals from each other, and a circuit board (12) on which the LEDs (11) are mounted.

[0083] The first bottom cover (310) is bent at an end to form a space for accommodating the second light guide plate (320) and the second optical sheet (330), and the substrate of the second light source unit (340) can be adhered to the inner surface of the bent portion of the first bottom cover (310).

[0084] Meanwhile, in order to reduce the size of the first bottom cover (310), a groove may be formed on one side of the second light guide plate (320) and the LED (11) of the second light source unit (340) may be provided in a structure in which the groove is inserted. However, the present invention is not limited thereto, and 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) is coupled to the first bottom cover (310) and can be 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). Accordingly, the first guide panel (350) can be positioned in the second module (300) at a position corresponding to the first housing (250) of the first module (200).

[0086] Due to this structure, the first module (200) and the second module (300) can be provided to be detachable. For example, the first guide panel (350) and the first housing (250) can be bonded by an adhesive material such as an adhesive or double-sided tape having an adhesive strength sufficient to allow for easy attachment and detachment.

[0087] In an embodiment, the display device includes a first module (200) and a second module (300), each having a light source unit, and the first module (200) and the second module (300) may be provided to be detachable.

[0088] Since each light source unit is modularized and easily detachable from each other, the display device can be easily assembled, and replacement of some of the multiple light source units, as well as maintenance and repair of the display device, can also be facilitated.

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

[0090] The first-second piece (352) extends in the vertical direction and is coupled to the side of the first bottom cover (310), and can be placed between the first bottom cover (310) and the second housing (360). The first-second piece (352) can be bent relative to the first-first piece (351) and coupled to the bent side of the first bottom cover (310) by an adhesive member.

[0091] The first and second pieces (352) are fitted into the space formed between the folded portion of the first bottom cover (310) and the folded portion of the second housing (360), and are bonded to the folded portion of the second housing (360) so as to be stably connected to the second module (300).

[0092] The coupling protrusion (353) protrudes upward and the first module (200) can be coupled. The coupling protrusion (353) protrudes upward at the point where the first-first piece (351) and the first-second piece (352) meet, and the first housing (250) of the first module (200) can be placed on the upper surface thereof.

[0093] The upper surface of the coupling protrusion (353) and the lower surface of the first housing (250) can be coupled to each other by an adhesive material. At this time, as described above, the coupling protrusion (353) and the first housing (250) are coupled to each other by an adhesive material having an appropriate adhesive strength, so that they can be coupled 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) may be in contact with the lower surface of the first bottom cover (310) and may 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) and surrounds the edge of the first bottom cover (310) and the side of the first guide panel (350) to firmly connect the first bottom cover (310) and the first guide panel (350).

[0096] The first reflective sheet (370) is placed on the lower side of the second light guide plate (320) and can be accommodated in the first bottom cover (310). The first reflective sheet (370) reflects light emitted from the lower surface of the second light guide plate (320) and causes it to re-enter the second light guide plate (320), thereby directing most of the light from the second light guide plate (320) toward the display unit (100), thereby increasing the efficiency of light 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 may diffuse light. Light passing through the diffusion sheet (331) may be diffused to become more uniform light.

[0098] The prism sheet (332) is placed on the upper side of the diffusion sheet (331) and can improve the straightness of light. Since the prism sheet (332) is provided with a prism structure, the prism sheet (332) can partially collect light incident through the diffusion sheet (331) and improve the straightness of light.

[0099] The protective sheet (333) can be placed on the upper side of the prism sheet (332). The protective sheet (333) can protect the diffusion sheet (331) and the prism sheet (332) from being damaged by external foreign substances or scratches.

[0100] Meanwhile, 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 laminated in the order in which light passes, like the second optical sheet (330).

[0101] Fig. 4 is a perspective view showing a first frame (240) according to an embodiment. Fig. 5 is a drawing showing a state in which a first light guide plate (210) and a first optical sheet (220) are fitted into the first frame (240) illustrated in Fig. 4.

[0102] As illustrated in Fig. 4, the first frame (240) may be formed in a "U" shape when viewed in cross-section, and a groove may be formed on the inside. The edges of the first light guide plate (210) and the second optical sheet (330) are fitted into this groove, and thus the first light guide plate (210) and the first optical sheet (220) can be stably coupled to the first frame (240).

[0103] The first frame (240) may be provided so that one side is open. The first light guide plate (210) and the first optical sheet (220) may be inserted and slid into the first frame (240) through the open portion of the first frame (240) while being coupled to the first housing (250), thereby being coupled to the first frame (240).

[0104] Referring to FIG. 5, the first light guide plate (210) and the first optical sheet (220) can be fitted into 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 as a pair of relatively long bars and a single relatively short bar combined. In this case, a pair of long bars spaced apart from each other may be fitted to the edges of the first light guide plate (210) and the first optical sheet (220).

[0106] Fig. 6 is a drawing showing a state in which a first light guide plate (210) and a first optical sheet (220) are mounted on a first frame (240). Fig. 7 is a drawing showing a state in which a first housing (250) and a heat dissipation unit (260) are additionally mounted in Fig. 6. The heat dissipation unit (260) shown in Fig. 7 will be described in detail below.

[0107] Referring to FIG. 6, the first light guide plate (210) and the first optical sheet (220) can be completely combined with the first frame (240) by sliding relative to the first frame (240) while being inserted into the first frame (240).

[0108] Next, as illustrated in FIG. 7, after the first light guide plate (210) and the first optical sheet (220) are completely coupled to the first frame (240), the first housing (250) can be fitted to the first light guide plate (210) and the first optical sheet (220) through the open portion of the first frame (240). Accordingly, the first light source unit (230) disposed in the first housing (250) can be disposed to face one side of the first light guide plate (210).

[0109] In the embodiment, the first frame (240) may be formed integrally and may have one side open. The first light guide plate (210) and the first optical sheet (220) may be inserted into grooves formed in the first frame (240) and slidably mounted on the first frame (240).

[0110] Due to this structure, assembly and disassembly of the first module (200) of the display device becomes easy, and work time, cost, and effort can be effectively reduced.

[0111] Fig. 8 is a perspective view showing some parts of a display device having a first frame (240) according to another embodiment. Fig. 9 is an exploded view of Fig. 8. Fig. 10 is a cross-sectional view showing some parts of the parts shown in Fig. 8. In this 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), and the first part (241) and the second part (242) can be provided separately. By combining the first part (241) and the second part (242), the first light guide plate (210) and the first optical sheet (220) can be mounted on the first module (200).

[0113] The first part (241) has one surface in contact with the first optical sheet (220) so that the first optical sheet (220) can be mounted on 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) so that the first light guide plate (210) can be mounted on the first module (200).

[0114] Referring to FIG. 10, the first part (241) may include a first-1 part (2411) and a first-2 part (2412). A first optical sheet (220) may be coupled to the first-1 part (2411). The first-2 part (2412) may be bent from one end of the first-1 part (2411) and coupled to the second part (242).

[0115] The first-1 part (2411) is in contact with the upper surface of the first optical sheet (220), and the first-2 part (2412) is combined with the second part (242), so that the first optical sheet (220) can be mounted on the first module (200).

[0116] The second part (242) may include a second-first part (2421) and a second-second part (2422). A first light guide plate (210) may 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), coupled to the first-second part (2412), and a first light source unit (230) may be arranged thereon.

[0117] The 2-1 part (2421) is in contact with the lower surface of the 1st light guide plate (210), and the 2-2 part (2422) is combined with the 1-2 part (2412), so that the light guide plate can be mounted on the 1st module (200).

[0118] An adhesive member is provided at the part where the 1st-2nd part (2412) and the 2nd-2nd part (2422) face each other and come into contact with each other, so that the 1st-2nd part (2412) and the 2nd-2nd part (2422) can be adhered to each other.

[0119] As shown in FIG. 10, the 1-2 part (2412) is placed on the outside and the 2-2 part (2422) is placed on the inside, so the first light source part (230) can be placed on the 2nd part (242) by being bonded to the inside surface of the 2-2 part (2422) by an adhesive member.

[0120] In another embodiment, the 2-2 part (2422) may be placed on the outside and the 1-2 part (2412) may be placed on the inside, so that the first light source unit (230) may be placed on the 2-2 part (2421) by being bonded to the inside surface of the 2-1 part (2421) using an adhesive member.

[0121] The first frame (240) may be provided in a rectangular shape with a space formed on the inside. By combining the first part (241) and the second part (242), the first light guide plate (210) and the first optical sheet (220) can be combined with the first frame (240).

[0122] The first frame (240) is coupled to the edge of the first light guide plate (210) and the first optical sheet (220) which are provided in a square shape, so that the first light guide plate (210) and the first optical sheet (220) can be stably mounted on the first module (200).

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

[0124] Fig. 11 is a cross-sectional view showing a portion of a display device according to another embodiment. In Fig. 11, the first module (200) is shown as a partial embodiment, but it is obvious that it can be replaced with another embodiment of the first module (200) described above.

[0125] In addition, although the second guide panel (315) is illustrated in FIG. 11, it is obvious that the second guide panel (315) can be provided by being replaced with the first guide panel (350) described above.

[0126] Referring to Fig. 11, a second module (300) of another embodiment may include a second bottom cover (311), a diffusion 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 that the upper portion is open and may form the outer shape of the second module (300). The second bottom cover (311) may accommodate components constituting the second module (300), including the diffusion plate (312) and the third light source unit (314).

[0127] A step surface (3111) may be formed on the second bottom cover (311) to place the edge portion of the diffuser plate (312). In addition, a folded end portion of the second reflective sheet (316) may be placed on the step surface (3111).

[0128] The diffuser plate (312) can be accommodated, at least in part, in the second bottom cover (311). The diffuser plate (312) is positioned above the third light source unit (314), so that light irradiated from the third light source unit (314) can pass through the diffuser plate (312).

[0129] The diffuser (312) can diffuse light, change a point light source into a surface light source, and improve the uniformity of light. Light passing through the diffuser (312) can enter the third optical sheet (313).

[0130] The third optical sheet (313) may be placed above the diffusion plate (312). Light emitted from the diffusion plate (312) may be further diffused as it passes through the third optical sheet (313) and may be incident on the display unit (100) in the form of a surface light source with higher uniformity.

[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 irradiated from the third light source unit (314) can travel upward and enter the diffuser plate (312) to become a surface light source.

[0132] The third light source unit (314) may be provided with a plurality of LEDs (11) arranged at intervals from each other in the horizontal and vertical directions on a plane perpendicular to the vertical direction as shown in FIG. 11, and a circuit board (12) on which the LEDs (11) are mounted.

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

[0134] The second guide panel (315) can be detachably coupled to the first housing (250) of the first module (200). Accordingly, the second guide panel (315) can be placed in a position corresponding to the first housing (250) of the first module (200) in the second module (300).

[0135] The second guide panel (315) may include a second-1 piece (3151) and a second-2 piece (3152). The second-1 piece (3151) may extend laterally, be coupled to the upper end of the second bottom cover (311), and be coupled to the first module (200).

[0136] The second-1 piece (3151) can be extended laterally from the second guide panel (315) to prevent the diffusion plate (312) and the third optical sheet (313) from being separated from the second bottom cover (311).

[0137] The second-2 piece (3152) is bent from the second-1 piece (3151) and extends in the vertical direction, and is positioned on the outside of the side surface of the second bottom cover (311) so that it can be joined to the side surface of the second bottom cover (311). The second-2 piece (3152) is bent relative to the second-1 piece (3151) and can be joined to the bent side surface 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 an appropriate adhesive strength, so that the second-first piece (3151) and the first housing (250) can be detachably coupled to each other. Accordingly, the first module (200) and the second module (300) can be detachably coupled to each other.

[0139] Meanwhile, the second module (300) may include a second reflective sheet (316) that is coupled to the third light source unit (314) and reflects light irradiated from the third light source unit (314) and directs it toward the diffuser plate (312). The second reflective sheet (316) may reflect light directed toward the second bottom cover (311) and direct it toward the diffuser plate (312), thereby increasing the efficiency of light in the second module (300).

[0140] The second reflective sheet (316) may be placed on the upper surface of the circuit board (12). However, in cases where the circuit configuration or other structure of the upper surface of the circuit board (12) is complex, it may be placed on the lower surface of the circuit board (12).

[0141] Fig. 12 is a cross-sectional view showing a structure with a heat dissipation part (260) added to Fig. 11. Fig. 13 is a drawing showing a state in which a heat dissipation part (260) is coupled to a first housing (250).

[0142] When the LED (11) placed in the first module (200) operates, 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 unit (260) positioned adjacent to the first light source unit (230) in the first housing (250). The heat dissipation unit (260) may include a heat dissipation fin (261) and a holder (262).

[0144] The heat dissipation fin (261) may be provided with a plurality of grooves and recesses to increase the contact area with the outside air. The holder (262) has a cross-section in the shape of a "U", and the heat dissipation fin (261) is mounted in the groove portion, and can be connected to a first housing (250) using an adhesive member or a screw-like joint mechanism.

[0145] As illustrated in Fig. 13, the first light source unit (230) may have multiple light sources arranged spaced apart from each other. That is, the first light source unit (230) may have multiple LEDs (11) arranged at regular intervals in the longitudinal direction of the first housing (250).

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

[0147] In response to this, the heat dissipation unit (260) may be arranged so that its longitudinal direction is parallel to the direction in which the plurality of light sources of the first light source unit (230) are arranged. Due to this structure, when the first light source unit (230) is heated due to the emission of light by the plurality of LEDs (11), the heat dissipation unit (260) can uniformly cool the first light source unit (230) in the longitudinal direction, thereby effectively suppressing overheating of the first light source unit (230).

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

[0149] The display unit may include a public area in front of the display unit in which all users can view the displayed image; and optionally, a variable private area in which all users or only some users can view the displayed image. When the light source of the first module is on, the variable private area may be provided so that all users can view the displayed image, and when the light source of the first module is off, the variable private area may be provided so that 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 an edge of the first light guide plate, wherein the first light source unit may be disposed in the first frame or a first housing coupled to the first light guide plate and the first optical sheet.

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

[0152] The first light source unit may have a plurality of light sources arranged spaced apart from each other, and the heat dissipation unit may be arranged such that the longitudinal direction is parallel to the direction in which the plurality of light sources of the first light source unit are arranged.

[0153] The first housing may include 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; and a third cell that is bent from the first cell and the second cell to connect the first cell and the second cell, and in which the first light source unit is disposed.

[0154] The first frame may include a first part having one surface in contact with the first optical sheet; and a second part coupled to the first part and having one surface in contact with the first light guide plate.

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

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

[0157] The first frame is provided in a rectangular shape with a space formed on the inside, and by combining the first part and the second part, the first light guide plate and the first optical sheet can be combined with the first frame.

[0158] The second module may include a first bottom cover having an open top; a second light guide plate accommodated in the first bottom cover; a second optical sheet disposed above the second light guide plate; a second light source unit disposed 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 arranged on the lower side of the second light guide plate and accommodated 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 surface of the first bottom cover and positioned between the first bottom cover and the second housing; and a coupling protrusion protruding upward and coupled to the first module.

[0161] The second optical sheet may include a diffusion sheet arranged on the upper side of the second light guide plate and diffusing light; a prism sheet arranged on the upper side of the diffusion sheet and improving the straightness of light; and a protective sheet arranged on the upper side of the prism sheet.

[0162] The second module may include a second bottom cover having an open upper portion; a diffuser plate at least partially accommodated in the second bottom cover; a third optical sheet disposed above the diffuser plate; a third light source unit disposed 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 that is coupled to the third light source unit and reflects light irradiated from the third light source unit and directs it toward the diffusion plate.

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

[0165] Although the present specification has been described with reference to the drawings exemplified above, it is to be understood that the present specification is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical spirit of the present specification. Furthermore, even if the operational effects according to the configuration of the present specification have not been explicitly described while describing the embodiments of the present specification, it is natural that the effects predictable by the configuration should also be acknowledged.

Claims

1. Display section; A first module positioned at the lower side of the display unit and irradiating light to the display unit; and A second module positioned below the first module and irradiating light onto the display unit Including, The first module and the second module are provided to be detachable. Display device.

2. In paragraph 1, The above display unit, A public area in front of the display unit where all users can view the displayed image; and A variable private area where images can be displayed to all or only some users, optionally Including, When the light source of the first module is turned on, the variable personal area is provided so that all users can see the displayed image, and when the light source of the first module is turned off, the variable personal area is provided so that only some users can see the displayed image. Display device.

3. In paragraph 1, The above first module, 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 Including, The first light source unit is disposed in a first housing coupled to the first frame or the first light guide plate and the first optical sheet. Display device.

4. In paragraph 3, The above first module, A heat dissipation unit positioned adjacent to the first light source unit in the first housing including, Display device.

5. In paragraph 4, The first light source unit is arranged such that a plurality of light sources are spaced apart from each other, and the heat dissipation unit is arranged such that the longitudinal direction is parallel to the direction in which the plurality of light sources of the first light source unit are arranged. Display device.

6. In paragraph 3, The above first housing, A first cell having one side in contact with the first optical sheet; A second cell having one side in contact with the first light guide plate; and A third cell that is bent from the first cell and the second cell to connect the first cell and the second cell, and in which the first light source unit is arranged. including, Display device.

7. In paragraph 3, The above first frame is, A first part having one side in contact with the first optical sheet; and A second part that is combined with the first part and has one side in contact with the first light guide plate including, Display device.

8. In paragraph 7, The above first part, Part 1-1 to which the first optical sheet is coupled; and Part 1-2, which is bent from one end of the above part 1-1 and joined to the above part 2 Including, The second part above is, Part 2-1 to which the first light guide plate is coupled; and Part 2-2, which is bent from one end of the above part 2-1, is combined with the above part 1-2, and has the above first light source portion arranged thereon. including, Display device.

9. In paragraph 6, The above first frame is provided so that one side is open, The first light guide plate and the first optical sheet are inserted and slid into the first frame through the open portion of the first frame while being combined with the first housing, and are combined with the first frame. Display device.

10. In paragraph 7, The above first frame is provided in a square shape with a space formed on the inside, By combining the first part and the second part, the first light guide plate and the first optical sheet are combined with the first frame. Display device.

11. In paragraph 3, The above second module, First bottom cover with open top; A second light guide plate accommodated in the first bottom cover; A second optical sheet arranged on the upper side of the second light guide plate; A second light source unit disposed on one side of the second light guide plate and irradiating light toward the second light guide plate; and A first guide panel that is coupled to the first bottom cover and detachably coupled to the first module including, Display device.

12. In paragraph 11, The above second module, 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 arranged on the lower side of the second light guide plate and accommodated in the first bottom cover including, Display device.

13. In paragraph 12, The above first guide panel is, A first-1 piece extending laterally and joined to the upper end of the first bottom cover; A first-second piece extending vertically and coupled to a side surface of the first bottom cover, and positioned between the first bottom cover and the second housing; and A connecting projection that protrudes upward and to which the first module is connected including, Display device.

14. In paragraph 11, The above second optical sheet, A diffusion sheet arranged on the upper side of the second light guide plate and diffusing light; A prism sheet arranged on the upper side of the diffusion sheet and improving the straightness of light; and A protective sheet placed on the upper side of the prism sheet including, Display device.

15. In paragraph 3, The above second module, Second bottom cover with open top; A diffuser plate, at least a portion of which is accommodated in the second bottom cover; A third optical sheet arranged on the upper side of the above diffuser plate; A third light source unit positioned on the lower side of the diffusion plate and irradiating light toward the diffusion plate; and A second guide panel that is coupled to the second bottom cover and detachably coupled to the first module including, Display device.

16. In paragraph 15, The above second module, A second reflective sheet that is coupled to the third light source unit and reflects the light irradiated from the third light source unit and directs it toward the diffusion plate. including, Display device.

17. In paragraph 16, The above second guide panel is, A second-1 piece extending laterally, coupled to the upper end of the second bottom cover, and coupled to the first module; and A 2-2 piece that is bent from the 2-1 piece and extends in the vertical direction, is placed on the outside of the side of the 2nd bottom cover, and is joined to the side of the 2nd bottom cover. including, Display device.

Images