Display apparatus

Abstract

A display apparatus of the present disclosure may comprise: a display panel; and a light source device provided to provide light to the display panel. The light source device may comprise: a substrate; a plurality of first light sources mounted on the substrate, each of the plurality of first light sources including a first light-emitting diode and a first lens provided to cover the first light-emitting diode; and a second light source mounted on the substrate to be disposed between two adjacent first light sources among the plurality of first light sources, the second light source including a second light-emitting diode and a second lens provided to cover the second light-emitting diode.

Description

display device

[0001] The present disclosure relates to a display device, and more particularly, to a display device including a display panel and a light source device.

[0002] A display device is an output device that converts acquired or stored electrical information into visual information and displays it to the user. Display devices are used in a variety of fields, including homes and businesses.

[0003] The display device may include a monitor device connected to a personal computer or a server computer, a portable computer device, a navigation terminal device, a general television device, an Internet Protocol television (IPTV) device, a smart phone, a tablet PC, a personal digital assistant (PDA), or a portable terminal device such as a cellular phone, various display devices used to play images such as advertisements or movies in industrial settings, or various types of audio / video systems.

[0004] The display device includes a light source module for converting electrical information into visual information, and the light source module includes a plurality of light sources for independently emitting light.

[0005] Each of the plurality of light sources includes, for example, a light emitting diode (LED) or an organic light emitting diode (OLED). For example, the light emitting diode or organic light emitting diode may be mounted on a circuit board or substrate.

[0006] The present disclosure provides a display device having an improved structure.

[0007] The present disclosure provides a display device with improved optical efficiency.

[0008] The present disclosure provides a display device having uniform brightness.

[0009] The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0010] A display device according to one embodiment of the present disclosure may include a display panel; and a light source device configured to provide light to the display panel. The light source device may include a substrate; a plurality of first light sources on the substrate, each of the plurality of first light sources including a first light emitting diode and an anisotropic reflective lens configured to cover the first light emitting diode; and a second light source between two adjacent first light sources on the substrate, the second light source including a second light emitting diode and a refractive lens configured to cover the second light emitting diode.

[0011] A display device according to one embodiment of the present disclosure may include a display panel including a pair of long sides extending in a first direction and a pair of short sides extending in a second direction; and a light source device disposed at the rear of the display panel. The light source device may include a plurality of first light sources arranged to be spaced apart from each other by a first distance along the first direction, and a second light source arranged to be spaced apart from any one of the plurality of first light sources by a second distance less than the first distance along the first direction. Each of the plurality of first light sources may include a first light emitting diode and an anisotropic reflective lens arranged to cover the first light emitting diode. The second light source may include a second light emitting diode and a refractive lens arranged to cover the second light emitting diode.

[0012] FIG. 1 is a perspective view of a display device according to one embodiment of the present disclosure.

[0013] FIG. 2 is an exploded view of an example of a display device according to one embodiment of the present disclosure.

[0014] FIG. 3 is an exploded view of an example of a display device according to one embodiment of the present disclosure.

[0015] FIG. 4 is a cross-sectional view of a display panel according to one embodiment of the present disclosure.

[0016] FIG. 5 is a perspective view of a light source device according to one embodiment of the present disclosure.

[0017] FIG. 6 is a cross-sectional view schematically illustrating a first light source and a reflective sheet of a light source device according to one embodiment of the present disclosure.

[0018] FIG. 7 is a cross-sectional view schematically illustrating a first light source and a reflective sheet of a light source device according to one embodiment of the present disclosure.

[0019] FIG. 8 is a cross-sectional view schematically illustrating a second light source and a reflective sheet of a light source device according to one embodiment of the present disclosure.

[0020] FIG. 9 is a front view schematically illustrating an example of a display device according to one embodiment of the present disclosure.

[0021] FIG. 10 is a front view schematically illustrating an example of a display device according to one embodiment of the present disclosure.

[0022] FIG. 11 is a front view schematically illustrating an example of a display device according to one embodiment of the present disclosure.

[0023] FIG. 12 is a front view schematically illustrating an example of a display device according to one embodiment of the present disclosure.

[0024] FIG. 13 is a front view schematically illustrating an example of a display device according to one embodiment of the present disclosure.

[0025] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather to encompass various modifications, equivalents, or alternatives of the embodiments.

[0026] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0027] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0028] In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0029] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0030] The terms "part," "module," and "member" may be implemented in hardware or software. Depending on the embodiments, multiple "parts," "modules," or "members" may be implemented as a single component, or a single "part," "module," or "member" may include multiple components.

[0031] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0032] When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0033] The terms "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0034] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0035] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0036] The terms “front / rear direction,” “front,” and “rear” used in the description below are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0037] For example, the terms "front" and "rear" may be defined relative to the X direction depicted in the drawings, respectively. For example, the terms "upper" and "lower" may be defined relative to the Z direction depicted in the drawings, respectively. For example, the terms "left direction" and "right direction" may be defined relative to the Y direction depicted in the drawings, respectively. For example, the term "vertical direction" may refer to the Z direction depicted in the drawings, respectively. For example, the term "horizontal direction" may refer to the Y direction depicted in the drawings, respectively.

[0038] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0039] FIG. 1 is a perspective view of a display device according to one embodiment of the present disclosure.

[0040] Referring to FIG. 1, a display device (1) according to one embodiment of the present disclosure is a device that processes an image signal received from the outside and can visually display the processed image. In FIG. 1, the display device (1) is exemplified as a television (TV), but is not limited thereto. For example, the display device (1) can be implemented in various forms such as a monitor, which is a type of computer output device, a portable multimedia device, a portable communication device, etc., and the form of the display device (1) is not limited as long as it is a device that visually displays an image.

[0041] In addition, the display device (1) may be a large format display (LFD) installed outdoors, such as on a building rooftop or at a bus stop. Here, "outdoors" is not limited to the outdoors. The display device (1) according to one embodiment of the present disclosure may be installed in any indoor location where a large number of people may pass through, such as a subway station, shopping mall, movie theater, company, or store.

[0042] In Fig. 1, the display device (1) is described as a flat display device with a flat screen as an example, but is not limited thereto, and the display device according to the concept of the present disclosure can also be applied to a curved display device or a bendable or flexible display device in which the flat state and the curved state can be changed. In addition, the configuration of the present disclosure can be applied to display devices of various shapes regardless of the screen size or ratio of the display device.

[0043] The display device (1) can receive content including video signals and audio signals from various content sources, and output video and audio corresponding to the video signals and audio signals. For example, the display device (1) can receive content data via a broadcast reception antenna or a wired cable, receive content data from a content playback device, or receive content data from a content provider's content provision server.

[0044] The display device (1) can display an image corresponding to video data and output a sound corresponding to audio data. For example, the display device (1) can restore a plurality of image frames included in the video data and continuously display the plurality of image frames. In addition, the display device (1) can restore an audio signal included in the audio data and continuously output a sound according to the audio signal.

[0045] As illustrated in FIG. 1, the display device (1) may include a main body (11) and a screen (12) that displays an image (I).

[0046] The display device (1) can be installed in a standing manner on an indoor or outdoor floor or furniture, or can be installed in a wall-mounted manner on a wall or within a wall. For example, the display device (1) can include a support leg (19) provided at the lower portion of the main body (11) so that it can be installed in a standing manner on an indoor or outdoor floor or furniture.

[0047] The main body (11) can form the outer shape of the display device (1). Parts for performing various functions, such as displaying an image (I) by the display device (1), can be provided inside the main body (11).

[0048] The display device (1) can be configured to display an image (I). Specifically, the screen (12) can be formed on the front of the main body (11), and the display device (1) can display the image (I) through the screen (12). For example, the screen (12) can display a still image or a moving image. In addition, the screen (12) can display a two-dimensional flat image or a three-dimensional stereoscopic image using the parallax of the user's two eyes.

[0049] A plurality of pixels (P) may be formed on the screen (12). An image (I) displayed on the screen (12) may be formed by light emitted from each of the plurality of pixels (P). For example, an image (I) may be formed on the screen (12) by combining the light emitted from the plurality of pixels (P) like a mosaic.

[0050] Each of the plurality of pixels (P) can emit light of different brightness and different colors. Specifically, each of the plurality of pixels (P) is divided into sub-pixels (P R , P G , P B) may include sub-pixels (P R , P G , P B ) is a red sub-pixel (P) that can emit red light. R ), a green sub-pixel (P) capable of emitting green light G ) and blue sub-pixels (P) capable of emitting blue light. B ) can include. For example, red light can refer to light with a wavelength of approximately 620 nm (nanometer, one billionth of a meter) to 750 nm, green light can refer to light with a wavelength of approximately 495 nm to 570 nm, and blue light can refer to light with a wavelength of approximately 450 nm to 495 nm.

[0051] Red subpixel (P R ), green subpixel (P G ) and blue subpixel (P B ) Each of the plurality of pixels (P) can emit light of various brightness and color by combining the light emitted from each pixel.

[0052] FIG. 2 is an exploded view of an example of a display device according to one embodiment of the present disclosure. FIG. 3 is an exploded view of an example of a display device according to one embodiment of the present disclosure.

[0053] Referring to FIGS. 2 and 3, various components for generating an image (I) on a screen (12) may be provided inside a main body (11) of a display device (1) according to one embodiment of the present disclosure.

[0054] For example, the display device (1) may include a display panel (20). The display panel (20) may be provided on the main body (11). The display panel (20) may be provided to display an image (I). The screen (12) described in FIG. 1 may be formed on the front surface of the display panel (20).

[0055] For example, the display panel (20) may have an approximately rectangular shape. The display panel (20) may have a shape in which the length of a horizontal side (e.g., L1, see FIGS. 9 to 13) and the length of a vertical side (e.g., L2, see FIGS. 9 to 13) are different from each other. The display panel (20) may include a pair of long sides (20a, 20b) extending along a first direction (A). The display panel (20) may include a first long side (20a) and a second long side (20b). The display panel (20) may include a pair of short sides (20c, 20d) extending along a second direction (B). The display panel (20) may include a first short side (20c) and a second short side (20d). The second direction (B) may be a direction intersecting the first direction (A). The second direction (B) may be a direction approximately perpendicular to the first direction (A). In the drawing, the first direction (A) is illustrated as being approximately horizontal (Y direction) and the second direction (B) as being approximately vertical (Z direction), but the first direction (A) may be approximately vertical (Z direction) and the second direction (B) may be approximately horizontal (Y direction). However, the present disclosure is not limited to the above-described example, and the display panel (20) may have a square shape in which the length of the horizontal side (e.g., L1, see FIGS. 9 to 13) and the length of the vertical side (e.g., L2, see FIGS. 9 to 13) are approximately equal.

[0056] The display panel (20) can be provided in various sizes. The ratio of the long side to the short side of the display panel (20) is not limited to general cases such as 16:9 or 4:3, but can be provided in any arbitrary ratio.

[0057] On one side of the display panel (20), a cable (40) for transmitting image data to the display panel (20) and a display driver integrated circuit (DDI) (30) (hereinafter referred to as a 'driver IC') for processing digital image data and outputting an analog image signal may be provided.

[0058] The cable (40) can electrically connect between the control assembly (50) / power assembly (60) and the driver IC (30), and can also electrically connect between the driver IC (30) and the display panel (20). The cable (40) can include a flexible flat cable that can be bent, a film cable, or the like.

[0059] The driver IC (30) can receive image data and power from the control assembly (50) / power assembly (60) through the cable (40), and transmit image data and driving current to the display panel (20) through the cable (40).

[0060] The cable (40) and the driver IC (30) may be implemented as a single unit, such as a film cable, a chip on film (COF), a tape carrier packet (TCP), etc. In other words, the driver IC (30) may be placed (e.g., provided) on the cable (20b). However, this is not limited thereto, and the driver IC (30) may be placed on the display panel (20).

[0061] A detailed description of the structure of the display panel (20) will be described later.

[0062] The display device (1) may include a backlight unit (70). The backlight unit (70) may be provided to irradiate light toward the display panel (20). The backlight unit (70) may be provided in the main body (11). The backlight unit (70) may be arranged at the rear of the display panel (20). The backlight unit (70) may be arranged at the rear of the display panel (20) to irradiate light toward the front where the display panel (20) is located. For example, the backlight unit (70) may be configured as a surface light source. The display panel (20) may block or allow light emitted from the backlight unit (70) to pass through.

[0063] The backlight unit (70) may include a point light source that emits monochromatic light or white light, and may be configured to refract, reflect, and scatter light to convert light emitted from the point light source into uniform surface light. The backlight unit (70) may emit uniform surface light toward the front by refracting, reflecting, and scattering light emitted from the point light source.

[0064] The backlight unit (70) may include a light source device (71). The light source device (71) may generate and emit light. For example, the light source device (71) may be configured to emit monochromatic light or white light. The light source device (71) may be configured to provide light to the display panel (20).

[0065] According to one embodiment of the present disclosure, the light source device (71) may be disposed at the rear of the display panel (20). The light source device (71) may not be disposed so as to be out of the respective sides (20a, 20b, 20c, 20d) of the display panel (20). The light source device (71) may be disposed inside the respective sides (20a, 20b, 20c, 20d) of the display panel (20). That is, when the display device (1) is viewed from the front, the light source device (71) may be arranged so as to be covered by the display panel (20) and not exposed from the display panel (20).

[0066] In FIGS. 2 and 3, the light source device (71) is illustrated as being one, but the present disclosure is not limited thereto. The light source device (71) may be provided in multiple numbers (see FIGS. 10, 12, and 13).

[0067] The light source device (71) may be referred to as a light source module (71), a light source unit (71), a light source assembly (71), etc.

[0068] The backlight unit (70) may include a reflective sheet (72). The reflective sheet (72) may be configured to reflect light. The reflective sheet (72) may reflect light forward or in a direction close to the forward direction. The reflective sheet (72) may reflect light emitted from a light source device (71) and / or light emitted rearward from a diffusion plate (73) described later toward the display panel (20).

[0069] For example, the light source device (71) (specifically, a plurality of light sources (100, 200) of the light source device (71), see FIG. 5) can emit light in various directions. The light emitted from the light source device (71) can be emitted not only toward the diffuser plate (73), but also toward the reflective sheet (72) from the light source device (71), and the reflective sheet (72) can reflect the light emitted toward the reflective sheet (72) toward the diffuser plate (73). Alternatively, some of the light emitted from the light source device (71) may be reflected from the surfaces of the diffuser plate (73), the optical sheet (74), etc., while passing through various objects such as the diffuser plate (73) and the optical sheet (74), and the reflective sheet (72) can reflect the reflected light forward again for this reason.

[0070] For example, referring to FIG. 2, a reflective sheet (72) may be provided at the rear of a light source device (71). The reflective sheet (72) may be placed in front of the bottom chassis (15), and the light source device (71) may be placed in front of the reflective sheet (72). The reflective sheet (72) may be placed between the light source device (71) and the bottom chassis (15). The reflective sheet (72) may be placed to cover the front of the bottom chassis (15).

[0071] For example, referring to FIG. 3, a reflective sheet (72) may be provided in front of a substrate (300, see FIG. 5) of a light source device (71). The reflective sheet (72) may include a plurality of through holes (72a) corresponding to each of a plurality of light sources (100, 200, see FIG. 5) of the light source device (71). Each of the plurality of light sources (100, 200, see FIG. 5) may pass through each of the plurality of through holes (72a) and protrude forward of the reflective sheet (72) (see FIGS. 6 to 8). The light sources (100, 200) of the light source device (71) and a portion of the substrate (300) may be exposed toward the front of the reflective sheet (72) through the through holes (72a) (see FIGS. 6 to 8).

[0072] However, the reflective sheet (72) according to one embodiment of the present disclosure is not limited to that illustrated in FIGS. 2 and 3. As long as the reflective sheet (72) can reflect light toward the display panel (20) and / or the optical member (73 and / or 74) to be described later, the shape, position, etc. of the reflective sheet (72) are not limited.

[0073] The backlight unit (70) may include a diffuser plate (73). The diffuser plate (73) may be provided to evenly diffuse light. The diffuser plate (73) may be provided in front of the light source device (71) and the reflective sheet (72). The diffuser plate (73) may evenly disperse the light emitted from the light source device (71) and then emit it forward.

[0074] The backlight unit (70) may include an optical sheet (74). The optical sheet (74) may be provided to further improve the brightness and uniformity of the emitted light. The optical sheet (74) may be provided to refract and scatter light emitted from the front of the diffusion plate (73). For example, the optical sheet (74) may include various types of sheets, such as a diffusion sheet, a prism sheet, a reflective polarizing sheet, and a quantum dot sheet.

[0075] The diffuser plate (73) and the optical sheet (74) may be referred to as optical members.

[0076] The display device (1) may include a control assembly (50) that controls the operation of the backlight unit (70) and the display panel (20). The display device (1) may include a power assembly (60) that supplies power to the backlight unit (70) and the display panel (20). The control assembly (50) and the power assembly (60) may be provided in the main body (11). For example, the control assembly (50) and the power assembly (60) may be provided between the bottom chassis (15) and the rear cover (16).

[0077] For example, the control assembly (50) may include a control circuit that controls the operation of the display panel (20) and the backlight unit (70). The control circuit may process image data received from an external content source, transmit the image data to the display panel (20), and transmit dimming data to the backlight unit (70).

[0078] For example, the power assembly (60) can supply power to the display panel (20) and the backlight unit (70) so that the backlight unit (70) outputs surface light and the display panel (20) blocks or passes light from the backlight unit (70).

[0079] The control assembly (50) and the power assembly (60) may be implemented as printed circuit boards and various circuits mounted on the printed circuit board. For example, the power circuit may include capacitors, coils, resistors, processors, etc., and a power circuit board on which these are mounted. In addition, the control circuit may include memory, a processor, and a control circuit board on which these are mounted.

[0080] The display device (1) may include a display case that is provided to support various components of the main body (11) of the display device (1). In other words, various components of the main body (11) may be accommodated inside the display case. The display case may form the outer shape of the display device (1).

[0081] For example, the display case may support a display panel (20). For example, the display case may support a backlight unit (70). For example, the display case may support a control assembly (50). For example, the display case may support a power assembly (60).

[0082] For example, the display device (1) may include a top chassis (13). The top chassis (13) may include a top chassis (13) that supports the front or side of the display panel (20). For example, the top chassis (13) may be provided in the shape of a roughly square frame. The top chassis (13) may be provided as a component of a display case.

[0083] The top chassis (13) may form a bezel that is positioned to face the front of the display device (1) and support the front of the display panel (20). However, if the display device (1) is a bezel-less type display device with a very narrow or no bezel, the top chassis (13) may be provided to support only the side of the display panel (20). Alternatively, if the bottom chassis (15) supports the side of the display panel (20), the display device (1) may not include the top chassis (13).

[0084] For example, the display device (1) may include a bottom chassis (15). The bottom chassis (15) may cover the rear of the display panel (20). The bottom chassis (15) may be coupled to the rear of the top chassis (13). The bottom chassis (15) may support various components of the display device (1), such as a backlight unit (70), a control assembly (50), and a power assembly (60). The bottom chassis (15) may be provided as a component of a display case.

[0085] The bottom chassis (15) may be formed to have a roughly flat plate shape, but is not limited thereto. The bottom chassis (15) may be formed to include a material with high thermal conductivity so as to dissipate heat generated from the light source device (71) to the outside. For example, the bottom chassis (15) may be formed to include a metal material such as aluminum or SUS, or a plastic material such as ABS.

[0086] For example, the display device (1) may include a middle mold (14). The middle mold (14) may be positioned between the top chassis (13) and the bottom chassis (15). For example, the middle mold (14) may support at least some components of the backlight unit (70). The middle mold (14) may be provided as a component of a display case.

[0087] For example, the display device (1) may include a rear cover (16). The rear cover (16) is positioned at the rear of the bottom chassis (15) and may cover the bottom chassis (15) and various components (e.g., a control assembly (50), a power assembly (60), etc.) mounted at the rear of the bottom chassis (15). The rear cover (16) may be provided as a component of a display case.

[0088] Meanwhile, unlike as shown in FIGS. 2 and 3, a display device (1) according to one embodiment of the present disclosure may not include some of the components of the top chassis (13), the middle mold (14), the bottom chassis (15), and the rear cover (16).

[0089] The configuration of the display device (1) described above with reference to FIGS. 2 and 3 is merely an example for explaining the display device according to the concept of the present disclosure, and the concept of the present disclosure is not limited thereto. The display device according to the concept of the present disclosure may be provided to include various configurations for performing the function of providing an image through a screen.

[0090] FIG. 4 is a cross-sectional view of a display panel according to one embodiment of the present disclosure.

[0091] Referring to FIG. 4, a display panel (20) included in a display device (1) according to one embodiment of the present disclosure may be configured to block or allow light emitted from a backlight unit (70) to pass through. By the operation of the display panel (20) blocking or allowing light emitted from the backlight unit (70) to pass through, an image (I) may be formed in front of the display panel (20).

[0092] The front surface of the display panel (20) can form the screen (12) of the display device (1) described above. A plurality of pixels (P) can be provided on the display panel (20). The plurality of pixels (P) provided on the display panel (20) can independently block or transmit light from the backlight unit (70), and the light transmitted by the plurality of pixels (P) can form an image (I) displayed on the screen (12).

[0093] For example, the display panel (20) may be composed of a liquid crystal display (LCD) panel.

[0094] For example, as illustrated in FIG. 4, the display panel (20) may include a first polarizing film (21), a first transparent substrate (22), a pixel electrode (23), a thin film transistor (24), a liquid crystal layer (25), a common electrode (26), a color filter (27), a second transparent substrate (28), and a second polarizing film (29).

[0095] The first transparent substrate (22) and the second transparent substrate (28) can fix and / or support the pixel electrode (23), the thin film transistor (24), the liquid crystal layer (25), the common electrode (26), and the color filter (27). These first and second transparent substrates (22, 28) can be made of reinforced glass or transparent resin.

[0096] A first polarizing film (21) and a second polarizing film (29) may be provided on the outer side of the first and second transparent substrates (22, 28).

[0097] The first polarizing film (21) and the second polarizing film (29) can each transmit specific light and block other light. For example, the polarization direction of the light transmitted by the first polarizing film (21) and the vibration direction of the light transmitted by the second polarizing film (29) can be orthogonal to each other. As a result, light generally cannot simultaneously transmit through the first polarizing film (21) and the second polarizing film (29).

[0098] A color filter (27) may be provided on the inner side of the second transparent substrate (28).

[0099] The color filter (27) may include, for example, a red filter (27R) that passes red light, a green filter (27G) that passes green light, and a blue filter (27G) that passes blue light. The red filter (27R), the green filter (27G), and the blue filter (27B) may be arranged parallel to each other. The area where the color filter (27) is formed may correspond to the pixel (P) described above. The area where the red filter (27R) is formed may correspond to the red sub-pixel (P). R ) corresponds to the green sub-pixel (P), and the area where the green filter (27G) is formed is the green sub-pixel (P G ) corresponds to the blue sub-pixel (P), and the area where the blue filter (27B) is formed is a blue sub-pixel (P B ) can be corresponded to.

[0100] A pixel electrode (23) may be provided on the inner side of the first transparent substrate (22), and a common electrode (26) may be provided on the inner side of the second transparent substrate (28).

[0101] The pixel electrode (23) and the common electrode (26) are made of a metal material that conducts electricity, and can generate an electric field to change the arrangement of liquid crystal molecules (25a) that constitute the liquid crystal layer (25) described below.

[0102] The pixel electrode (23) and the common electrode (26) are made of a transparent material and can transmit light incident from the outside. For example, the pixel electrode (23) and the common electrode (26) may be made of indium tin oxide (ITO), indium zinc oxide (IZO), silver nanowire (Ag nanowire), carbon nanotube (CNT), graphene, or PEDOT (3,4-ethylenedioxythiophene).

[0103] A thin film transistor (TFT) (24) may be provided on the inner side of the first transparent substrate (22).

[0104] The thin film transistor (24) can pass or block current flowing through the pixel electrode (23). For example, an electric field can be formed or removed between the pixel electrode (23) and the common electrode (26) depending on whether the thin film transistor (24) is turned on (closed) or turned off (open).

[0105] The thin film transistor (24) can be composed of polysilicon and can be formed by a semiconductor process such as lithography, deposition, or ion implantation.

[0106] A liquid crystal layer (25) may be formed between the pixel electrode (23) and the common electrode (26). The liquid crystal layer (25) may be filled with liquid crystal molecules (25a).

[0107] Liquid crystals exhibit a state intermediate between that of a solid (crystal) and a liquid. Most liquid crystal substances are organic compounds, and their molecular structure is elongated and rod-shaped. While the arrangement of these molecules resembles an irregular state in some directions, they can form regular crystals in other directions. As a result, liquid crystals can exhibit both the fluidity of a liquid and the optical anisotropy of a crystal (solid).

[0108] In addition, liquid crystals can exhibit optical properties depending on changes in the electric field. For example, the direction of the arrangement of molecules constituting the liquid crystal can change depending on changes in the electric field. When an electric field is generated in the liquid crystal layer (25), the liquid crystal molecules (25a) of the liquid crystal layer (25) can be arranged according to the direction of the electric field. When an electric field is not generated in the liquid crystal layer (25), the liquid crystal molecules (25a) can be arranged irregularly or along an alignment layer (not shown). As a result, the optical properties of the liquid crystal layer (25) can vary depending on the presence or absence of an electric field passing through the liquid crystal layer (25).

[0109] The structure of the display panel (20) described above with reference to FIG. 4 is only an example of the structure that the display panel of the display device according to the concept of the present disclosure may have, and the concept of the present disclosure is not limited thereto.

[0110] Fig. 5 is a perspective view of a light source device according to an embodiment of the present disclosure. Fig. 6 is a cross-sectional view schematically illustrating a first light source and a reflective sheet of a light source device according to an embodiment of the present disclosure. Fig. 7 is a cross-sectional view schematically illustrating a first light source and a reflective sheet of a light source device according to an embodiment of the present disclosure. Fig. 8 is a cross-sectional view schematically illustrating a second light source and a reflective sheet of a light source device according to an embodiment of the present disclosure.

[0111] A display device (1) according to one embodiment of the present disclosure may include a backlight unit (70). The backlight unit (70) may include a light source device (71). The backlight unit (70) may include a reflective sheet (72). For example, at least a portion of the light source device (71) may be positioned in front of the reflective sheet (72).

[0112] The light source device (71) may include a substrate (300). The substrate (300) may be provided to mount light sources (100, 200) to be described later. The substrate (300) may be provided to supply power to each of the light sources (100, 200). The substrate (300) may be provided to fix and / or support the light sources (100, 200).

[0113] For example, the substrate (300) may include a PCB (Printed Circuit Board). Circuit patterns (not shown) for transmitting driving power and signals to the light sources (100, 200) may be formed on the substrate (300). A connector (not shown) for connection to an external circuit may be mounted on the substrate (300).

[0114] The light source device (71) may include a plurality of first light sources (100). Each of the plurality of first light sources (100) may be configured to emit light. Each of the plurality of first light sources (100) may be configured to provide light to the display panel (20). The first light source (100) may employ a device that, when supplied with power, can emit monochromatic light (light of a specific wavelength, for example, blue light) or white light (for example, light mixed with red light, green light, and blue light) in various directions.

[0115] A plurality of first light sources (100) may be mounted on the substrate (300). The plurality of first light sources (100) may be provided on the front surface of the substrate (300). Here, the front surface of the substrate (300) may refer to a side of the substrate (300) facing the display panel (20). That is, each of the plurality of first light sources (100) may be mounted on the substrate (300) so as to face forward and emit light.

[0116] Each of the plurality of first light sources (100) may include a first light emitting diode (LED) (110).

[0117] The first light-emitting diode (110) may include a P-type semiconductor and an N-type semiconductor for emitting light through the recombination of holes and electrons. In addition, the first light-emitting diode (110) may be provided with a pair of electrodes for supplying holes and electrons to the P-type semiconductor and the N-type semiconductor, respectively.

[0118] The first light-emitting diode (110) may be configured to convert electrical energy into light energy. The first light-emitting diode (110) may emit light having a maximum intensity at a predetermined wavelength based on the supplied power.

[0119] For example, a multilayer reflective structure in which a plurality of insulating films having different refractive indices are alternately laminated may be provided on the front surface of the first light-emitting diode (110). For example, such a multilayer reflective structure may be configured as a distributed Bragg reflector (DBR).

[0120] For example, the first light emitting diode (110) may be directly attached to the substrate (300) in a chip on board (COB) manner. In other words, each first light source (100) may include a first light emitting diode (110) in which a light emitting diode chip or light emitting diode die is directly attached to the substrate (300) without separate packaging.

[0121] Each of the plurality of first light sources (100) may include an anisotropic reflective lens (120). For example, the anisotropic reflective lens (120) may include a sunken shape.

[0122] An anisotropic reflective lens (120) may be provided to cover the first light-emitting diode (110). The anisotropic reflective lens (120) may protect the first light-emitting diode (110). The anisotropic reflective lens (120) may prevent or suppress damage to the first light-emitting diode (110).

[0123] The anisotropic reflective lens (120) can reflect light emitted from the first light-emitting diode (110). Specifically, the reflective surface (122, see FIGS. 6 and 7) of the anisotropic reflective lens (120) can reflect light emitted from the first light-emitting diode (110). At this time, the anisotropic reflective lens (120) reflecting light emitted from the first light-emitting diode (110) may include not only reflecting 100% of the light emitted from the first light-emitting diode (110), but also reflecting most of the light emitted from the first light-emitting diode (110).

[0124] The anisotropic reflective lens (120) can diffuse the light emitted from the first light-emitting diode (110) by reflecting the light emitted from the first light-emitting diode (110). For example, the anisotropic reflective lens (120) can guide the light emitted from the first light-emitting diode (110) approximately in a first direction (A) and / or approximately in a second direction (B). For example, the anisotropic reflective lens (120) can diffuse the light emitted from the first light-emitting diode (110) approximately along the YZ plane.

[0125] The anisotropic reflective lens (120) may have an anisotropic light distribution structure. The anisotropic reflective lens (120) may be configured to transmit light further in a specific direction. Depending on the directionality of light incident on the anisotropic reflective lens (120), the path of light reflected by the anisotropic reflective lens (120) may vary. For example, the anisotropic reflective lens (120) may transmit light emitted from the first light-emitting diode (110) further in the second direction (B) than in the first direction (A). A detailed description thereof will be provided later.

[0126] The light source device (71) may include at least one second light source (200). The second light source (200) may be configured to emit light. The second light source (200) may be configured to provide light to the display panel (20). The second light source (200) may employ a device that, when supplied with power, can emit monochromatic light (light of a specific wavelength, for example, blue light) or white light (for example, light mixed with red light, green light, and blue light) in various directions.

[0127] The second light source (200) may be mounted on the substrate (300). The second light source (200) may be provided on the front surface of the substrate (300). Here, the front surface of the substrate (300) may refer to a side of the substrate (300) facing the display panel (20). That is, the second light source (200) may be mounted on the substrate (300) so as to face forward and emit light.

[0128] The second light source (200) may include a second light emitting diode (LED) (210).

[0129] The second light-emitting diode (210) may include a P-type semiconductor and an N-type semiconductor for emitting light by the recombination of holes and electrons. In addition, the second light-emitting diode (210) may be provided with a pair of electrodes for supplying holes and electrons to the P-type semiconductor and the N-type semiconductor, respectively.

[0130] The second light-emitting diode (210) may be configured to convert electrical energy into light energy. The second light-emitting diode (210) may emit light having a maximum intensity at a predetermined wavelength based on the supplied power.

[0131] For example, a multilayer reflective structure in which a plurality of insulating films having different refractive indices are alternately laminated may be provided on the front surface of the second light-emitting diode (210). For example, such a multilayer reflective structure may be configured as a distributed Bragg reflector (DBR).

[0132] For example, the second light emitting diode (210) may be directly attached to the substrate (300) in a chip on board (COB) manner. In other words, the second light source (200) may include a second light emitting diode (210) in which a light emitting diode chip or light emitting diode die is directly attached to the substrate (300) without separate packaging.

[0133] The second light source (200) may include a refractive lens (220). For example, the refractive lens (220) may include a dome shape.

[0134] A refractive lens (220) may be provided to cover the second light-emitting diode (210). The refractive lens (220) may protect the second light-emitting diode (210). The refractive lens (220) may prevent or suppress damage to the second light-emitting diode (210).

[0135] The refractive lens (220) can refract light emitted from the second light-emitting diode (210). At this time, the refractive lens (220) refracting light emitted from the second light-emitting diode (210) may not only refract 100% of the light emitted from the second light-emitting diode (210), but may also include refracting most of the light emitted from the second light-emitting diode (210).

[0136] For example, the refractive lens (220) may not be able to send light relatively far compared to the anisotropic reflective lens (120). However, the luminance directly above the refractive lens (220) may be relatively high compared to the luminance directly above the anisotropic reflective lens (120). For example, the refractive lens (220) may guide the light emitted from the second light-emitting diode (210) approximately forward (+X direction) and in a direction close thereto. The refractive lens (220) may be arranged between the anisotropic reflective lenses (120) to compensate for the luminance. The refractive lens (220) may be arranged at a point where the luminance is relatively low. A detailed description thereof will be given later.

[0137] Meanwhile, although the first light source (100) is described in this document as including an anisotropic reflective lens (120) having a sunken shape, the present disclosure is not limited thereto. The first light source (100) may include first lenses of various types and / or shapes capable of reflecting light. Similarly, although the second light source (200) is described in this document as including a dome-shaped refractive lens (220), the present disclosure is not limited thereto. The second light source (200) may include second lenses of various types and / or shapes capable of refracting light. The first lens and the second lens may replace the anisotropic reflective lens (120) and the refractive lens (220), respectively. The anisotropic reflective lens (120) and the refractive lens (220) may also be referred to as the first lens (120) and the second lens (220), respectively.

[0138] Next, with reference to FIGS. 6 and 7, the shape of the anisotropic reflective lens (120) of the first light source (100) and the light path of the first light source (100) will be described. However, FIGS. 6 and 7 are merely exemplary, and the scale of some components may be exaggerated for convenience of explanation.

[0139] The first light source (100) may include a first light-emitting diode (110) and an anisotropic reflective lens (120) provided to cover the first light-emitting diode (110).

[0140] The anisotropic reflective lens (120) may include a bottom portion (121) that is mounted on a substrate (300). The bottom portion (121) may be attached to the substrate (300). For example, the outermost portion of the bottom portion (121) may be formed in various shapes, such as a circular shape, an oval shape, or a polygonal shape.

[0141] The anisotropic reflective lens (120) may include a reflective surface (122) provided on the opposite side of the bottom portion (121). The reflective surface (122) may be arranged to face the display panel (20). The reflective surface (122) may be arranged to face the optical member (73 and / or 74). The reflective surface (122) may be arranged to reflect light emitted from the first light emitting diode (110). The reflective surface (122) may have an inwardly sunken shape. The reflective surface (122) may have a shape sunken toward the rear (- X direction). The reflective surface (122) may have a concave shape. For example, the reflective surface (122) may include a shape that is inclined downward toward the center of the anisotropic reflective lens (120).

[0142] The anisotropic reflective lens (120) may include a side portion (124) provided to connect the bottom portion (121) and the reflective surface (122). The side portion (124) may extend approximately along the front-back direction (X direction). The side portion (124) may have an approximately columnar shape.

[0143] The anisotropic reflective lens (120) may include a groove (123). The groove (123) may be configured to accommodate a first light-emitting diode (110). While the anisotropic reflective lens (120) covers the first light-emitting diode (110), the first light-emitting diode (110) may be placed in the groove (123). The groove (123) may be recessed from the bottom (121). The groove (123) may have a recessed shape toward the front (+ X direction) from the bottom (121).

[0144] The anisotropic reflective lens (120) may include an incident surface (123a). The incident surface (123a) may be formed by forming a groove (123) in the anisotropic reflective lens (120). The incident surface (123a) may be provided to define the groove (123). The incident surface (123a) may be provided to surround the first light-emitting diode (110). Light emitted from the first light-emitting diode (110) may be refracted while passing through the incident surface (123a).

[0145] Meanwhile, the anisotropic reflective lens (120) can send light further in a certain direction. To this end, the cross-sectional shape of the groove (123) of the anisotropic reflective lens (120) may not be uniform.

[0146] For example, the groove (123) may have a first size (see FIG. 6) along the first direction (A) and a second size (see FIG. 7) along the second direction (B). Here, the size of the groove (123) may mean the maximum size based on the cross-section of the groove (123).

[0147] For example, the first length (G1, see FIG. 6) of the groove (123) along the first direction (A) may be smaller than the second length (G2, see FIG. 7) of the groove (123) along the second direction (B). The second length (G2, see FIG. 7) of the groove (123) along the second direction (B) may be larger than the first length (G1, see FIG. 6) of the groove (123) along the first direction (A). Here, the length of the groove (123) may mean the maximum length based on the cross-section of the groove (123).

[0148] Accordingly, the light emitted from the first light-emitting diode (110) can be guided further in the second direction (B) than in the first direction (A) by the groove (123) of the anisotropic reflective lens (120). That is, the anisotropic reflective lens (120) can send the light emitted from the first light-emitting diode (110) further in the second direction (B) than in the first direction (A).

[0149] For example, referring to FIG. 6, when the size (or length) of the groove (123) is small, the distance between the first light emitting diode (110) and the incident surface (123a) may be relatively close. Accordingly, among the light passing through the incident surface (123a), the proportion of light reflected by the central portion of the reflective surface (122) and the portion adjacent thereto may be relatively high. The light reflected by the central portion of the reflective surface (122) and the portion adjacent thereto may not spread relatively far compared to the light reflected by the outer portion of the reflective surface (122) and the portion adjacent thereto.

[0150] For example, referring to FIG. 7, when the size (or length) of the groove (123) is large, the distance between the first light-emitting diode (110) and the incident surface (123a) may be relatively large. Accordingly, among the light passing through the incident surface (123a), the proportion of light reflected by the outer portion of the reflective surface (122) and the portion adjacent thereto may be relatively high. The light reflected by the outer portion of the reflective surface (122) and the portion adjacent thereto may spread relatively farther than the light reflected by the central portion of the reflective surface (122) and the portion adjacent thereto.

[0151] Next, with reference to FIG. 8, the shape of the refractive lens (220) of the second light source (200) and the light path of the second light source (200) will be described. However, FIG. 8 is merely exemplary, and the scale of some components may be exaggerated for convenience of explanation.

[0152] The second light source (200) may include a second light emitting diode (210) and a refractive lens (220) provided to cover the second light emitting diode (210).

[0153] The refractive lens (220) may include a bottom portion (221) that is mounted on a substrate (300). The bottom portion (221) may be attached to the substrate (300). For example, the outermost portion of the bottom portion (221) may be formed in various shapes, such as a circular shape, an oval shape, or a polygonal shape.

[0154] The refractive lens (220) may include an exit surface (222). The exit surface (222) may be arranged to face the display panel (20). The exit surface (222) may be arranged to face the optical member (73 and / or 74). Light emitted from the second light emitting diode (210) may exit the refractive lens (220) through the exit surface (222). For example, the light may be refracted at the exit surface (222). The exit surface (222) may include a dome shape. The exit surface (222) may have a convex shape. For example, the exit surface (222) may include a shape that slopes upward toward the center of the refractive lens (220).

[0155] The refractive lens (220) may include a groove (223). The groove (223) may be configured to accommodate a second light-emitting diode (210). While the refractive lens (220) covers the second light-emitting diode (210), the second light-emitting diode (210) may be placed in the groove (223). The groove (223) may be recessed from the bottom (221). The groove (223) may have a recessed shape toward the front (+ X direction) from the bottom (221).

[0156] The refractive lens (220) may include an incident surface (223a). The incident surface (223a) may be formed by forming a groove (223) in the refractive lens (220). The incident surface (223a) may be provided to define the groove (223). The incident surface (223a) may be provided to surround the second light-emitting diode (210). Light emitted from the second light-emitting diode (210) may be refracted while passing through the incident surface (223a).

[0157] Meanwhile, the refractive lens (220) can guide light approximately forward (+ X direction) and in a direction close to the forward direction. The light emitted from the second light source (200) (see FIG. 8) can be directed relatively forward (+ X direction) than the light emitted from the first light source (100) (see FIGS. 6 and 7). That is, the luminance directly above the refractive lens (220) can be relatively higher than the luminance directly above the anisotropic reflective lens (120). Consequently, the luminance directly above the second light source (200) can be relatively higher than the luminance directly above the first light source (100).

[0158] For example, referring to FIG. 8, light emitted from the second light-emitting diode (210) may be refracted at the incident surface (223a). Light refracted at the incident surface (223a) may be refracted at the exit surface (222). For example, the refractive index of the refractive lens (220) may vary depending on the material, medium, etc. of the refractive lens (220).

[0159] FIG. 9 is a front view schematically illustrating an example of a display device according to an embodiment of the present disclosure. However, the present disclosure is not limited to what is illustrated in FIG. 9, and the display device may further include an additional light source device other than the light source device (71) illustrated in FIG. 9. In this case, the additional light source device may be substantially the same as the light source device (71) or may be different from the light source device (71).

[0160] Referring to FIG. 9, the light source device (71) may include a substrate (300), a plurality of first light sources (100) mounted on the substrate (300), and at least one second light source (200) mounted on the substrate (300).

[0161] For example, the substrate (300) may include a shape that extends in one direction. The substrate (300) may include a bar shape that extends in the first direction (A). That is, the substrate (300) may have a longer length in the first direction (A) than in the second direction (B).

[0162] The second light source (200) may be placed between two adjacent light sources (100) among the plurality of first light sources (100). The second light source (200) may be placed between two neighboring first light sources (100) among the plurality of first light sources (100). In the drawing, one second light source (200) is depicted as being placed between two first light sources (100), but multiple second light sources (200) may be placed between two first light sources (100).

[0163] For example, a plurality of first light sources (100) may be arranged to be spaced apart from each other along a first direction (A). A first distance (D1) along the first direction (A) between any one of the plurality of first light sources (100) and another first light source adjacent to the first light source may be greater than a second distance (D2) along the first direction (A) between a second light source (200) and a first light source adjacent to the second light source (200). Here, “distance” may mean a distance between a center of one configuration and a center of another configuration, and the meaning thereof may also be applied to “distance” mentioned below.

[0164] For example, a plurality of first light sources (100) may be arranged spaced apart from each other by a predetermined first distance (D1) along a first direction (A). At this time, a second light source (200) may be arranged between two first light sources (100). Accordingly, the first distance (D1) may be greater than the second distance (D2).

[0165] However, unlike the above-described example, the plurality of first light sources (100) may not be spaced apart by a predetermined distance along the first direction (A). The plurality of first light sources (100) may be spaced apart by an irregular interval. In this case, the minimum distance along the first direction (A) between the first light sources (100) may be greater than the maximum distance along the first direction (A) between the first light source (100) and the second light source (200).

[0166] For example, the second light source (200) may be placed in the center between two adjacent first light sources (100) among the plurality of first light sources (100). In this case, the second distance (D2) may be approximately 1 / 2 times the first distance (D1).

[0167] For example, the second light source (200) may be positioned to correspond to the center (C) of the display panel (20). That is, the center of the second light source (200) and the center (C) of the display panel (20) may roughly coincide. The second light source (200) may be positioned to correspond to a half point (e.g., a halfway point) along the first direction (A) of the display panel (20). The second light source (200) may be positioned to correspond to a half point along the second direction (B) of the display panel (20).

[0168] For example, although not illustrated in FIG. 9, the second light source (200) may be arranged to correspond to a point spaced apart from one short side (20c or 20d) of the display panel (20) by 1 / 6 of the length in the first direction (A) of the display panel (20). The second light source (200) may be arranged to correspond to a point spaced apart from one long side (20a or 20b) of the display panel (20) by 1 / 6 of the length in the second direction (B) of the display panel (20). The purpose of the arrangement of the second light source (200) will be described later.

[0169] The distance (e.g., 1 / 2*L2) along the second direction (B) between the plurality of first light sources (100) and one long side (20a or 20b) of the display panel (20) may be greater than the distance (e.g., the first distance (D)) along the first direction (A) between the plurality of first light sources (100). Accordingly, for the screen uniformity of the display device, that is, to send light further in the second direction (B) than in the first direction (A), each of the plurality of first light sources (100) may include an anisotropic reflective lens (120). As described above, the anisotropic reflective lens (120) may guide light further in the second direction (B) than in the first direction (A). However, when the light source device (71) includes only the anisotropic reflective lens (120), the luminance of the portion directly above the light source device (71) may be relatively low. To address this, the light source device (71) may include at least one second light source (200) to compensate for brightness. The second light source (200) may include a refractive lens (220), and the refractive lens (220) may guide light in a direction toward the display panel (20) (e.g., forward (+X direction)) or a direction close thereto. The second light source (200) may be arranged to enhance brightness at a specific point. The second light source (200) may be placed at an appropriate point where brightness compensation is required. The second light source (200) may be placed at various locations depending on various factors. For example, the second light source (200) may be placed to correspond to a center portion of the display device and / or a uniformity measurement portion of the display device. The placement of the second light source (200) may be determined based on the spirit of the above-described description. Additionally, it goes without saying that the intent of the above description can also be applied to the embodiments to be described later.

[0170] FIG. 10 is a front view schematically illustrating an example of a display device according to an embodiment of the present disclosure. However, the present disclosure is not limited to what is illustrated in FIG. 10, and the display device may not include some of the plurality of light source devices (71) illustrated in FIG. 10. Alternatively, the display device may further include an additional light source device other than the plurality of light source devices (71) illustrated in FIG. 10. In this case, the additional light source device may be substantially the same as the light source device (71), or may be different from the light source device (71).

[0171] Any descriptions that overlap with those of the aforementioned embodiments may be omitted. Components substantially identical to the aforementioned configurations are assigned the same reference numbers, and detailed descriptions may be omitted.

[0172] Referring to FIG. 10, a display device according to an embodiment of the present disclosure may include a plurality of light source devices (71). For example, the display device may include a first light source device (71a), a second light source device (71b), and a third light source device (71c). The first light source device (71a), the second light source device (71b), and the third light source device (71c) are distinguished for convenience of explanation, and the ordinal numbers “first,” “second,” and “third” do not limit the configuration. Although the display device is illustrated in the drawing as including three light source devices (71a, 71b, and 71c), the present disclosure is not limited thereto. For example, a display device according to an embodiment of the present disclosure may include two light source devices (71). For example, a display device according to an embodiment of the present disclosure may include four or more light source devices (71).

[0173] A plurality of light source devices (71) may be arranged to have substantially the same configuration except for the arrangement. Each light source device (71a, 71b, 71c) may include a substrate (300), a plurality of first light sources (100) mounted on the substrate (300), and at least one second light source (200) mounted on the substrate (300).

[0174] For example, a plurality of light source devices (71) may be arranged spaced apart from each other along the second direction (B). For example, a plurality of light source devices (71) may be arranged spaced apart from each other at a predetermined interval along the second direction (B). A second light source device (71b) may be arranged above a first light source device (71a), and a third light source device (71c) may be arranged below the first light source device (71a).

[0175] For example, each of the plurality of substrates (300) may have a shape that extends in one direction. For example, each substrate (300) may have a bar shape that extends in the first direction (A). That is, each substrate (300) may have a longer length in the first direction (A) than in the second direction (B). Additionally, the plurality of substrates (300) may be spaced apart from each other along the second direction (B).

[0176] For example, the second light source (200) of each light source device (71) may be positioned to correspond to the 1 / 2 point along the first direction (A) of the display panel (20). The center of each second light source (200) may roughly coincide with the 1 / 2 point along the first direction (A) of the display panel (20).

[0177] For example, the second light source (200) of one of the plurality of light source devices (71) may be arranged to correspond to a half point along the second direction (B) of the display panel (20). The second light source (200) of the first light source device (71a) may be arranged to correspond to a half point along the second direction (B) of the display panel (20). The second light source (200) of the first light source device (71a) may be arranged to correspond to the center (C) of the display panel (20).

[0178] For example, the second light source (200) of one of the plurality of light source devices (71) may be arranged to correspond to a point spaced apart from one long side (20a or 20b) of the display panel (20) by 1 / 6 of the length in the second direction (B) of the display panel (20). The second light source (200) of the second light source device (71b) may be arranged to correspond to a point spaced apart from the first long side (20a) of the display panel (20) by 1 / 6 of the length in the second direction (B) of the display panel (20). The second light source (200) of the third light source device (71c) may be arranged to correspond to a point spaced apart from the second long side (20b) of the display panel (20) by 1 / 6 of the length in the second direction (B) of the display panel (20).

[0179] Fig. 11 is a front view schematically illustrating an example of a display device according to an embodiment of the present disclosure. However, the present disclosure is not limited to what is illustrated in Fig. 11, and the display device may further include an additional light source device other than the light source device (71) illustrated in Fig. 11. In this case, the additional light source device may be substantially the same as the light source device (71) or may be different from the light source device (71).

[0180] Any descriptions that overlap with those of the aforementioned embodiments may be omitted. Components substantially identical to the aforementioned configurations are assigned the same reference numbers, and detailed descriptions may be omitted.

[0181] Referring to FIG. 11, a light source device (71) according to one embodiment of the present disclosure may include a substrate (300), a plurality of first light sources (100) mounted on the substrate (300), and a plurality of second light sources (200) mounted on the substrate (300).

[0182] For example, the substrate (300) may include a shape that extends in one direction. The substrate (300) may include a bar shape that extends in the first direction (A). That is, the substrate (300) may have a longer length in the first direction (A) than in the second direction (B).

[0183] For example, a plurality of first light sources (100) may be arranged to be spaced apart from each other along the first direction (A). For example, a plurality of first light sources (100) may be arranged to be spaced apart from each other at irregular intervals along the first direction (A). In this case, a minimum distance (D3) between the first light sources (100) along the first direction (A) may be greater than a maximum distance (D4) between the first light source (100) and the second light source (200) along the first direction (A).

[0184] However, unlike the example described above, a plurality of first light sources (100) may be arranged spaced apart by a predetermined distance along the first direction (A).

[0185] For example, each of the plurality of second light sources (200) may be positioned between two adjacent first light sources (100). For example, each of the plurality of second light sources (200) may be positioned at the center between two adjacent first light sources (100).

[0186] For example, any one of the plurality of second light sources (200) may be positioned to correspond to a point spaced apart from one side (20c or 20d) of the display panel (20) by 1 / 6 of the length in the first direction (A) of the display panel (20).

[0187] For example, any one of the plurality of second light sources (200) may be arranged to correspond to a 1 / 2 point along the first direction (A) of the display panel (20). Any one of the plurality of second light sources (200) may be arranged to correspond to a 1 / 2 point along the second direction (B) of the display panel (20). Any one of the plurality of second light sources (200) may be arranged to correspond to the center (C) of the display panel (20).

[0188] For example, one of the plurality of second light sources (200) may be arranged to correspond to a 1 / 2 point along the first direction (A) of the display panel (20). Another of the plurality of second light sources (200) may be arranged to correspond to a point spaced apart from the first short side (20c) of the display panel (20) by 1 / 6 of the length along the first direction (A) of the display panel (20). Still another of the plurality of second light sources (200) may be arranged to correspond to a point spaced apart from the second short side (20d) of the display panel (20) by 1 / 6 of the length along the first direction (A) of the display panel (20). The plurality of second light sources (200) may be arranged to correspond to a 1 / 2 point along the second direction (B) of the display panel (20).

[0189] Fig. 12 is a front view schematically illustrating an example of a display device according to an embodiment of the present disclosure. However, the present disclosure is not limited to what is illustrated in Fig. 12, and the display device may not include some of the plurality of light source devices (71) illustrated in Fig. 12. Alternatively, the display device may further include an additional light source device other than the plurality of light source devices (71) illustrated in Fig. 12. In this case, the additional light source device may be substantially the same as the light source device (71) or may be different from the light source device (71).

[0190] Any descriptions that overlap with those of the aforementioned embodiments may be omitted. Components substantially identical to the aforementioned configurations are assigned the same reference numbers, and detailed descriptions may be omitted.

[0191] Referring to FIG. 12, a display device according to an embodiment of the present disclosure may include a plurality of light source devices (71). For example, the display device may include a fourth light source device (71d), a fifth light source device (71e), and a sixth light source device (71f). The fourth light source device (71d), the fifth light source device (71e), and the sixth light source device (71f) are distinguished for convenience of explanation, and the ordinal numbers “fourth,” “fifth,” and “sixth” do not limit the configuration. Although the display device is illustrated in the drawing as including three light source devices, the present disclosure is not limited thereto. For example, a display device according to an embodiment of the present disclosure may include two light source devices (71). For example, a display device according to an embodiment of the present disclosure may include four or more light source devices (71).

[0192] A plurality of light source devices (71) may be arranged to have substantially the same configuration except for the arrangement. Each light source device (71d, 71e, 71f) may include a substrate (300), a plurality of first light sources (100) mounted on the substrate (300), and a plurality of second light sources (200) mounted on the substrate (300).

[0193] For example, a plurality of light source devices (71) may be arranged spaced apart from each other along the second direction (B). A plurality of light source devices (71) may be arranged spaced apart from each other at predetermined intervals along the second direction (B). A fifth light source device (71e) may be arranged above a fourth light source device (71d), and a sixth light source device (71f) may be arranged below a fourth light source device (71d).

[0194] For example, each of the plurality of substrates (300) may have a shape that extends in one direction. For example, each substrate (300) may have a bar shape that extends in the first direction (A). That is, each substrate (300) may have a longer length in the first direction (A) than in the second direction (B). Additionally, the plurality of substrates (300) may be spaced apart from each other along the second direction (B).

[0195] For example, the plurality of second light sources (200) of the fourth light source device (71d) may be arranged to correspond to a point spaced apart from one long side (20a or 20b) of the display panel (20) by 1 / 2 the length in the second direction (B) of the display panel (20) (see P1, P2, and P3 in FIG. 12). Any one of the plurality of second light sources (200) of the fourth light source device (71d) may be arranged to correspond to a point spaced apart from the first direction (A) of the display panel (20) by 1 / 6 the length in the first direction (A) of the display panel (20) (see P2 in FIG. 12). Another one of the plurality of second light sources of the fourth light source device (71d) can be arranged to correspond to a point spaced apart from the second short side (20d) of the display panel (20) by 1 / 6 of the length in the first direction (A) of the display panel (20) (see P3 of FIG. 12).

[0196] For example, the plurality of second light sources (200) of the fifth light source device (71e) may be arranged to correspond to a point spaced apart from the first long side (20a) by 1 / 6 of the length in the second direction (B) of the display panel (see P4, P5, and P6 of FIG. 12). Any one of the plurality of second light sources (200) of the fifth light source device (71e) may be arranged to correspond to a point spaced apart from the first long side (20a) of the display panel (20) by 1 / 2 of the length in the first direction (A) of the display panel (20) (see P4 of FIG. 12). Another one of the plurality of second light sources of the fifth light source device (71e) may be arranged to correspond to a point spaced apart from the first short side (20c) of the display panel (20) by 1 / 6 of the length in the first direction (A) of the display panel (20) (see P5 of FIG. 12). Another one of the plurality of second light sources of the fifth light source device (71e) can be arranged to correspond to a point spaced apart from the second short side (20d) of the display panel (20) by 1 / 6 of the length in the first direction (A) of the display panel (20) (see P6 of FIG. 12).

[0197] For example, the plurality of second light sources (200) of the sixth light source device (71f) may be arranged to correspond to a point spaced apart from the second long side (20b) by 1 / 6 of the length in the second direction (B) of the display panel (see P7, P8, and P9 of FIG. 12). Any one of the plurality of second light sources (200) of the sixth light source device (71f) may be arranged to correspond to a point spaced apart from the first direction (A) of the display panel (20) by 1 / 2 of the length in the first direction (A) of the display panel (20) (see P7 of FIG. 12). Another one of the plurality of second light sources of the sixth light source device (71f) may be arranged to correspond to a point spaced apart from the first short side (20c) of the display panel (20) by 1 / 6 of the length in the first direction (A) of the display panel (20) (see P8 of FIG. 12). Another one of the plurality of second light sources of the sixth light source device (71f) may be arranged to correspond to a point spaced apart from the second short side (20d) of the display panel (20) by 1 / 6 of the length in the first direction (A) of the display panel (20) (see P9 of FIG. 12).

[0198] In general, to evaluate the uniformity of a display device, the screen of the display device can be divided into 9 areas and the brightness at the center point of each area can be measured and compared (9 points uniformity). For example, assuming that the horizontal length of the display panel (20) is L1 and the vertical length of the display panel is L2, the nine measurement points based on the upper left corner of the display panel (20) are as follows: P1 (1 / 2*L1, 1 / 2*L2), P2 (1 / 6*L1, 1 / 2*L2), P3 (5 / 6*L1, 1 / 2*L2), P4 (1 / 2*L1, 1 / 6*L2), P5 (1 / 6*L1, 1 / 6*L2), P6 (5 / 6*L1, 1 / 6*L2), P7 (1 / 2*L1, 5 / 6*L2), P8 (1 / 6*L1, 5 / 6*L2), P9 (5 / 6*L1, 5 / 6*L2). Considering this, according to one embodiment of the present disclosure, the second light source (200) may be arranged to be positioned at at least one of the nine measurement points described above. The second light source (200) may compensate for the luminance of the nine measurement points described above. As a result, the light efficiency and uniformity of the display device may be improved.

[0199] Fig. 13 is a front view schematically illustrating an example of a display device according to an embodiment of the present disclosure. However, the present disclosure is not limited to what is illustrated in Fig. 13, and the display device may not include some of the plurality of light source devices (71) illustrated in Fig. 13. Alternatively, the display device may further include an additional light source device other than the plurality of light source devices (71) illustrated in Fig. 13. In this case, the additional light source device may be substantially the same as the light source device (71) or may be different from the light source device (71).

[0200] Any descriptions that overlap with those of the aforementioned embodiments may be omitted. Components substantially identical to the aforementioned configurations are assigned the same reference numbers, and detailed descriptions may be omitted.

[0201] Referring to FIG. 13, a display device according to an embodiment of the present disclosure may include a plurality of light source devices (71). For example, the display device may include substantially identical light source devices, or may include different light source devices (71g, 71h). For example, the display device may include a seventh light source device (71g). For example, the display device may include an eighth light source device (71h). However, the display device according to an embodiment of the present disclosure may also include a single light source device (71).

[0202] For example, a plurality of light source devices (71) may be arranged in a matrix form of MXN (M, N natural numbers). In Fig. 13, six light source devices (71) are illustrated as being arranged in a 2 X 3 matrix form, but the present disclosure is not limited to that illustrated in Fig. 13. It goes without saying that the plurality of light source devices may be arranged in various patterns.

[0203] For example, each of the plurality of light source devices (71) may include a substrate (300), a plurality of first light sources (100) mounted on the substrate (300), and at least one second light source (200) mounted on the substrate (300). For example, the light sources (100 and 200) may be arranged in a matrix form.

[0204] For example, each of the plurality of substrates (300) may include a plate shape having a plane in the first direction (A) and the second direction (B). Each of the plurality of substrates (300) may include a plate shape having a YZ plane.

[0205] For example, a plurality of second light sources (200) may be arranged to correspond to the center portion of the display device and its adjacent portions.

[0206] For example, a plurality of second light sources (200) may be arranged to correspond to the uniformity measurement portion of the display device and adjacent portions thereof. For example, a plurality of second light sources (200) may be arranged to correspond to nine measurement points (see P1 to P9 of FIG. 12) and adjacent portions thereof.

[0207] A display device according to one embodiment of the present disclosure is not limited to that illustrated in FIGS. 10 to 13. Although not illustrated in the drawings, a combination of light source devices (71a, 71b, 71c, 71d, 71e, 71f, 71g, and / or 71f) is also possible.

[0208] A display device according to one embodiment of the present disclosure may include a display panel; and a light source device configured to provide light to the display panel. The light source device may include a substrate; a plurality of first light sources on the substrate; and a second light source between two adjacent first light sources among the plurality of first light sources on the substrate. Each first light source among the plurality of first light sources may include a first light emitting diode and an anisotropic reflective lens configured to cover the first light emitting diode. The second light source may include a second light emitting diode and a refractive lens configured to cover the second light emitting diode.

[0209] The display panel may include a pair of long sides extending along a first direction and a pair of short sides extending along a second direction. The plurality of first light sources may be spaced apart from each other along the first direction. A first distance along the first direction between any one of the plurality of first light sources and another first light source adjacent to the first light source may be greater than a second distance along the first direction between the second light source and the first light source adjacent to the second light source.

[0210] The second light source may be provided at the center between two adjacent first light sources among the plurality of first light sources.

[0211] The second light source may be positioned to correspond to a midpoint of the display panel along the first direction and a midpoint of the display panel along the second direction.

[0212] The above light source device may be provided in multiple numbers. The multiple light source devices may be spaced apart from each other along the second direction. The second light source of each light source device among the multiple light source devices may be positioned to correspond to a midpoint of the display panel along the first direction.

[0213] The second light source may be arranged at a point spaced apart from one (a / an) short side of the display panel by 1 / 6 of the length of the display panel in the first direction. The second light source may be arranged to correspond to a point spaced apart from one (a / an) long side of the display panel by 1 / 6 of the length of the display panel in the second direction.

[0214] The second light sources may be provided in plurality. One of the plurality of second light sources may be arranged to correspond to a midpoint of the display panel along the first direction. Another of the plurality of second light sources may be arranged to correspond to a point spaced apart from the first short side of the display panel by 1 / 6 of a length of the display panel along the first direction. Still another of the plurality of second light sources may be arranged to correspond to a point spaced apart from the second short side of the display panel by 1 / 6 of a length of the display panel along the first direction.

[0215] The plurality of second light sources may be arranged to correspond to a midpoint along the second direction of the display panel.

[0216] The plurality of second light sources may be arranged to correspond to a point spaced apart from one (a / an) long side of the display panel by 1 / 6 of the length in the second direction of the display panel.

[0217] The light source device may be provided in plurality. The plurality of light source devices may be spaced apart along the second direction. The plurality of second light sources of one light source device among the plurality of light source devices may be arranged to correspond to a midpoint of the display panel along the second direction. The plurality of second light sources of another light source device among the plurality of light source devices may be arranged to correspond to a point spaced apart from a first long side of the display panel by 1 / 6 of a length of the display panel along the second direction. The plurality of second light sources of another light source device among the plurality of light source devices may be arranged to correspond to a point spaced apart from a second long side of the display panel by 1 / 6 of a length of the display panel along the second direction.

[0218] The anisotropic reflective lens may include a bottom portion on the substrate. The anisotropic reflective lens may include a recessed portion recessed from the bottom portion to accommodate the first light-emitting diode.

[0219] The first length of the home portion along the first direction may be smaller than the second length of the home portion along the second direction.

[0220] The above anisotropic reflective lens may have a sunken shape. The above refractive lens may have a dome shape.

[0221] The above light source device may be provided in multiple forms. Each of the multiple substrates may have a bar shape extending along the first direction. The multiple substrates may be spaced apart along the second direction.

[0222] The above light source device may be provided in multiple numbers. Each of the multiple substrates may have a plate shape having a plane in the first direction and the second direction.

[0223] A display device according to one embodiment of the present disclosure may include a display panel including a pair of long sides extending in a first direction and a pair of short sides extending in a second direction; and a light source device disposed at the rear of the display panel. The light source device may include a plurality of first light sources arranged to be spaced apart from each other by a first distance along the first direction. The light source device may include a second light source arranged to be spaced apart from any one of the plurality of first light sources by a second distance less than the first distance along the first direction. Each of the plurality of first light sources may include a first light emitting diode and an anisotropic reflective lens arranged to cover the first light emitting diode. The second light source may include a second light emitting diode and a refractive lens arranged to cover the second light emitting diode.

[0224] The second light source may be placed between two adjacent first light sources among the plurality of first light sources.

[0225] The second light source may be positioned to correspond to a midpoint of the display panel along the first direction and a midpoint of the display panel along the second direction.

[0226] The second light source may be positioned at a point spaced apart from one short side of the display panel by 1 / 6 of the length of the display panel in the first direction. The second light source may be positioned to correspond to a point spaced apart from one long side of the display panel by 1 / 6 of the length of the display panel in the second direction.

[0227] The anisotropic reflective lens may include a groove portion that accommodates the first light-emitting diode. The groove portion may have a first length along the first direction and a second length along the second direction that is greater than the first length.

[0228] According to one embodiment of the present disclosure, a display device may have a light source device having an improved structure.

[0229] According to one embodiment of the present disclosure, a light source device may include a plurality of anisotropic reflective lenses and at least one refractive lens. By positioning at least one refractive lens between the anisotropic reflective lenses, luminance loss of a display device may be reduced or prevented. For example, the anisotropic reflective lens may guide most of the light in a generally vertical direction and / or horizontal direction, and the refractive lens may guide most of the light forward. As a result, the luminance efficiency of the display device may be improved. In addition, the display device may be implemented with uniform luminance.

[0230] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains.

[0231] The above illustrates and describes specific embodiments. However, the invention is not limited to the above-described embodiments, and those skilled in the art will readily appreciate that various modifications and implementations can be made without departing from the spirit and scope of the invention as set forth in the claims below.

Claims

1. Display panel; and A light source device configured to provide light to the display panel; The above light source device is, substrate; A plurality of first light sources on the substrate, each of the plurality of first light sources including a first light emitting diode and an anisotropic reflective lens arranged to cover the first light emitting diode; and A display device comprising: a second light source, which comprises a second light diode and a refractive lens arranged to cover the second light diode, as a second light source between two adjacent first light sources among the plurality of first light sources on the substrate; 2. In paragraph 1, The display panel includes a pair of long sides extending along a first direction and a pair of short sides extending along a second direction, The above plurality of first light sources are spaced apart from each other along the first direction, A display device in which a first distance in a first direction between any one of the plurality of first light sources and another first light source adjacent to any one of the first light sources is greater than a second distance in the first direction between the second light source and the first light source adjacent to the second light source.

3. In paragraph 1, A display device in which the second light source is provided in the center between two adjacent first light sources among the plurality of first light sources.

4. In paragraph 2, The above second light source is, A display device arranged to correspond to a midpoint of the display panel along the first direction and a midpoint of the display panel along the second direction.

5. In paragraph 2, The above light source device is provided in multiples, The plurality of light source devices are spaced apart from each other along the second direction, A display device in which the second light source of each light source device among the plurality of light source devices is positioned to correspond to the midpoint of the display panel along the first direction.

6. In paragraph 2, The above second light source is, A point spaced apart from one (a / an) side of the display panel by 1 / 6 of the length along the first direction of the display panel, A display device provided to correspond to a point spaced apart from one (a / an) long side of the display panel by 1 / 6 of the length in the second direction of the display panel.

7. In paragraph 2, The above second light source is provided in multiples, One of the second light sources among the plurality of second light sources is positioned to correspond to a midpoint along the first direction of the display panel, Another second light source among the plurality of second light sources is positioned to correspond to a point spaced apart from the first short side of the display panel by 1 / 6 of the length in the first direction of the display panel, A display device in which another second light source among the plurality of second light sources is positioned to correspond to a point spaced apart from the second short side of the display panel by 1 / 6 of the length in the first direction of the display panel.

8. In paragraph 7, A display device in which the plurality of second light sources are arranged to correspond to the middle point of the second direction of the display panel.

9. In paragraph 7, A display device in which the plurality of second light sources are arranged to correspond to a point spaced apart from one (a / an) long side of the display panel by 1 / 6 of the length in the second direction of the display panel.

10. In paragraph 8, The above light source device is provided in multiples, The plurality of light source devices are spaced apart along the second direction, A plurality of second light sources of one of the plurality of light source devices are arranged to correspond to a midpoint along the second direction of the display panel, A plurality of second light sources of another light source device among the plurality of light source devices are arranged to correspond to a point spaced apart from the first long side of the display panel by 1 / 6 of the length in the second direction of the display panel, A display device in which a plurality of second light sources of another light source device among a plurality of light source devices are arranged to correspond to a point spaced apart from a second long side of the display panel by 1 / 6 of the length in the second direction of the display panel.

11. In paragraph 2, A display device in which the anisotropic reflective lens includes a bottom portion on the substrate and a recess portion recessed from the bottom portion to accommodate the first light-emitting diode.

12. In paragraph 11, A display device in which the first length of the home portion along the first direction is smaller than the second length of the home portion along the second direction.

13. In paragraph 1, The above anisotropic reflective lens has a sunken shape, The above refractive lens is a display device having a dome shape.

14. In paragraph 2, The above light source device is provided in multiples, Each substrate among the plurality of substrates has a bar shape extending along the first direction, A display device in which a plurality of substrates are spaced apart along the second direction.

15. In paragraph 2, The above light source device is provided in multiples, A display device in which each of a plurality of substrates has a plate shape having a plane in the first direction and the second direction.

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