Display device

Abstract

The invention discloses a display device. A display device of the present invention may include: a display panel; and a backlight unit providing light to the display panel; the backlight unit may include: a substrate; a plurality of optical packages located on the substrate; and a lens covering the optical package; the light package may include: a first light source on the substrate; a second light source adjacent to the first light source; and a partition wall between the first light source and the second light source; in a first mode of the light package, the first light source and the second light source can be turned on to control brightness; in a second mode of the light package, the first light source can be turned on to control the brightness, and the second light source is turned off; in a third mode of the light package, the first light source can be turned off, and the second light source can be turned on to control brightness.

Description

TECHNICAL FIELD

[0001] The present application relates to a display device. BACKGROUND

[0002] With the development of information society, the requirements for display devices have increased in various forms, and for this reason, in recent years, various display devices such as LCD (Liquid Crystal Display Device), PDP (Plasma Display Panel), ELD (Electro luminescent Display), VFD (Vacuum Fluorescent Display), OLED (Organic Light Emitting Diode), etc. have been researched.

[0003] Among them, the LCD panel has a TFT substrate and a color substrate which are opposed to each other across a liquid crystal layer, and can display an image using light provided from a backlight unit.

[0004] In recent years, much research has been conducted on the structure of a substrate on which a light source such as an LED is mounted. In addition, much research has been conducted in order to improve the quality of an image displayed by a display panel. SUMMARY

[0005] The present application has been made to solve the foregoing problems and other problems.

[0006] Still another object of the present application is to provide a structure capable of improving the quality of an image by implementing a large number of local dimming blocks.

[0007] Still another object of the present application is to provide a structure capable of improving the contrast of an image and minimizing the halo phenomenon of an image by forming a local dimming block in each of a plurality of light sources provided in one light package.

[0008] Still another object of the present application is to provide a display device capable of saving manufacturing costs by providing a larger number of local dimming blocks than the number of light packages.

[0009] Still another object of the present application is to provide a structure capable of minimizing the overlap of a plurality of backlight coverage ranges of a plurality of light sources of a light package.

[0010] Still another object of the present application is to provide a structure capable of minimizing the overlap of a plurality of backlight coverage ranges of a plurality of light sources using a lens covering a light package.

[0011] Another object of the present application is to provide various examples regarding the number or configuration of the plurality of light sources in the optical package.

[0012] Another object of the present application is to provide a structure for setting the level of the brightness or size of the plurality of light sources in the optical package.

[0013] Another object of the present application is to provide various examples regarding the shape of the lens covering the optical package.

[0014] Another object of the present application is to provide a method of individually controlling the brightness of the plurality of light sources of the optical package.

[0015] According to an aspect of the present application for achieving the above or other objects, a display device can include a display panel; and a backlight unit providing light to the display panel; the backlight unit can include a substrate; a plurality of optical packages on the substrate; and a lens covering the optical packages; the optical package can include a first light source on the substrate; a second light source adjacent to the first light source; and a partition wall between the first light source and the second light source; in a first mode of the optical package, the first light source and the second light source can be all turned on (On) to control brightness; in a second mode of the optical package, the first light source can be turned on (On) to control brightness, and the second light source is turned off (Off); in a third mode of the optical package, the first light source can be turned off (Off), and the second light source is turned on (On) to control brightness.

[0016] In the display device, the lens can include a convex dome portion; a rear groove recessed from a rear surface of the dome portion, facing the optical package; and a front groove recessed from a front surface of the dome portion, located on an opposite side of the rear groove; a central axis of the partition wall extends in a direction crossing the rear groove and the front groove.

[0017] In the display device, a bottom of the rear groove can be a curved surface or a flat surface convex toward the first light source and the second light source of the optical package.

[0018] In the display device, a bottom of the front groove can be a flat surface or a curved surface recessed toward an inner side of the lens.

[0019] In the display device, the lens can extend in a direction in which the plurality of optical packages are arranged, covering the plurality of optical packages.

[0020] The display device can further include a controller controlling the brightness of the first light source and the brightness of the second light source.

[0021] Effects of the display device of the present application are described as follows.

[0022] According to at least one of the embodiments of the present application, a structure capable of improving a picture quality by implementing a large number of local dimming blocks can be provided.

[0023] According to at least one of the embodiments of the present application, a structure capable of improving a contrast of an image and minimizing a halo phenomenon of the image by forming a local dimming block in each of a plurality of light sources provided in one light package can be provided.

[0024] According to at least one of the embodiments of the present application, a display apparatus capable of saving manufacturing costs by providing a larger number of local dimming blocks than a number of light packages can be provided.

[0025] According to at least one of the embodiments of the present application, a structure capable of minimizing an overlap of a plurality of backlight coverage ranges of a plurality of light sources of a light package can be provided.

[0026] According to at least one of the embodiments of the present application, a structure capable of minimizing an overlap of a plurality of backlight coverage ranges of a plurality of light sources using a lens covering a light package can be provided.

[0027] According to at least one of the embodiments of the present application, various examples regarding a number or configuration of a plurality of light sources in a light package can be provided.

[0028] According to at least one of the embodiments of the present application, a structure setting a level of brightness or size of a plurality of light sources in a light package can be provided.

[0029] According to at least one of the embodiments of the present application, various examples regarding a shape of a lens covering a light package can be provided.

[0030] According to at least one of the embodiments of the present application, a method of individually controlling brightness of a plurality of light sources of a light package can be provided.

[0031] The scope of applicability of the present application can be construed based on the following detailed description. However, it will be apparent to those skilled in the art that various changes and modifications can be made thereto without departing from the spirit and scope of the present application, so it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the application, are given by way of illustration only. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figures 1 to 38 FIG. 1 is a diagram illustrating an example of a display apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. Unless otherwise specified in the drawing numbers, the same or similar components will be labeled with the same reference numerals, and repeated descriptions thereof will be omitted.

[0034] The suffixes “module” and “section” used in the following description are assigned or used interchangeably for ease of writing of the manual only, and they do not have any distinguishing meaning or function from each other.

[0035] Furthermore, when describing the embodiments disclosed in this specification, detailed descriptions of related well-known technologies are omitted if it is determined that such detailed descriptions may obscure the spirit of the embodiments disclosed in this specification. Moreover, the accompanying drawings are merely for the purpose of facilitating the understanding of the embodiments disclosed in this specification, and should be understood as not being limited by the drawings, but encompassing all modifications, equivalents, and substitutions included within the scope of the present invention's ideas and technology.

[0036] Ordinal terms such as first, second, etc., can be used to describe various constituent elements, but the constituent elements are not limited by these terms. The terms are only used to distinguish one constituent element from other constituent elements.

[0037] When it is said that one component is "connected" or "coupled" to another component, it should be understood that it can be directly connected or coupled to the other component, or that other components may exist between them. Conversely, when it is said that one component is "directly connected" or "directly coupled" to another component, it should be understood that no other components exist between them.

[0038] Unless otherwise expressly stated in the context, the singular expression includes the plural expression.

[0039] In this application, it should be understood that terms such as "comprising" or "having" are intended to describe the presence of features, figures, steps, actions, constituent elements, components, or combinations thereof described in the specification, and do not preclude the presence or possibility of one or more other features or figures, steps, actions, constituent elements, components, or combinations thereof.

[0040] The directions shown in the accompanying drawings—U (up), D (down), Le (left), Ri (right), F (front), and R (rear)—are for illustrative purposes only, and the technical concepts disclosed in this specification are not limited thereto.

[0041] Reference Figure 1 The display device 1 may include a display panel 10. The display panel 10 may display images.

[0042] Display device 1 may include a first long side LS1, a second long side LS2 opposite to the first long side LS1, a first short side SS1 adjacent to the first long side LS1 and the second long side LS2, and a second short side SS2 opposite to the first short side SS1. On the other hand, for ease of explanation, it is shown that the lengths of the first long side LS1 and the second long side LS2 are longer than the lengths of the first short side SS1 and the second short side SS2, but the lengths of the first long side LS1 and the second long side LS2 may also be approximately the same as the lengths of the first short side SS1 and the second short side SS2.

[0043] The directions parallel to the long sides LS1 and LS2 of the display device 1 can be referred to as the left and right directions. The first short side SS1 can be referred to as the left side Le, and the second short side SS2 can be referred to as the right side Ri.

[0044] The direction parallel to the short sides SS1 and SS2 of the display device 1 can be called the up and down direction. The first long side LS1 side can be called the upper side U and y, and the second long side LS2 side can be called the lower side D.

[0045] The directions perpendicular to the long sides LS1, LS2 and short sides SS1, SS2 of the display device 1 can be called the front-back directions. The directions in which the display panel 10 displays images can be called the front (F, Z) and the opposite directions can be called the rear (R).

[0046] The first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 can be referred to as the edges of display device 1. The points where the first long side LS1, the second long side LS2, the first short side SS1, and the two short sides SS2 intersect can be referred to as corners. The points where the first short side SS1 and the first long side LS1 intersect can be referred to as first corners Ca. The points where the first long side LS1 and the second short side SS2 intersect can be referred to as second corners Cb. The points where the second short side SS2 and the second long side LS2 intersect can be referred to as third corners Cc. The points where the second long side LS2 and the first short side SS1 intersect can be referred to as fourth corners Cd.

[0047] Reference Figure 2 The display device 1 may include a display panel 10, a housing top plate 15, a guide panel 20, backlight units 10 and 32, a frame 80, and a back cover 90.

[0048] The display panel 10 can form the front side of the display device 1 and can display images. The display panel 10 can display images by periodically outputting the RGB (Red, Green, or Blue) of each pixel through a plurality of pixels. The display panel 10 can be divided into an active area for displaying images and a de-active area for not displaying images. The display panel 10 may include a front substrate and a rear substrate that are opposite to each other through a liquid crystal layer. The display panel 10 can be referred to as an LCD (Liquid Crystal Display) panel 10.

[0049] The front substrate may include a plurality of pixels composed of red, green, and blue sub-pixels. The front substrate may output light corresponding to red, green, or blue according to a control signal.

[0050] The back substrate may include a plurality of switching elements. The back substrate can switch pixel electrodes. For example, the pixel electrodes can change the molecular arrangement of the liquid crystal layer according to an externally input control signal. The liquid crystal layer may contain liquid crystal molecules. The arrangement of the plurality of liquid crystal molecules can change accordingly with respect to the voltage difference generated between the pixel electrodes and the common electrode. The liquid crystal layer can transmit light provided from the backlight units OL, 32 to the front substrate or block the light.

[0051] The housing top plate 15 can extend along the periphery of the display panel 10 and can cover the side of the display panel 10. The guide panel 20 can extend along the periphery of the display panel 10. The guide panel 20 can be disposed between the display panel 10 and the housing top plate 15.

[0052] The backlight units OL and 32 can be located behind the display panel 10. The backlight units OL and 32 can include a plurality of light sources. The backlight units OL and 32 can be attached to the frame 80 in front of the frame 80. The backlight units OL and 32 can be driven in a global driving mode or in a local driving mode such as local dimming or impulsive dimming. The backlight units OL and 32 can include an optical sheet 32 ​​and an optical layer OL.

[0053] The optical sheet 32 ​​can uniformly transmit light from the light source to the display panel 10. The optical sheet 32 ​​can be composed of multiple layers. For example, the optical sheet 32 ​​may include a prism sheet or a diffuser sheet. On the other hand, the bonding portion 32d of the optical sheet 32 ​​can be bonded to the frame 80.

[0054] The frame 80 can be located behind the backlight units 10 and 32, and can support a plurality of components of the display device 1. For example, the backlight units 10 and 32, the PCB (Printed Circuit Board) on which a plurality of electronic components are set, and other components can be integrated into the frame 80. The frame 80 can be made of metal materials such as aluminum alloy. The frame 80 can be referred to as the main frame 80, the module cover 80, or the cover bottom 80.

[0055] The back cover 90 may cover the rear of the frame 80. The back cover 90 may be attached to the frame 80. For example, the back cover 90 may be an injection-molded material of resin. As another example, the back cover 90 may incorporate a metal material.

[0056] Reference Figure 3 and Figure 4 The optical layer OL may include a substrate 40, at least one optical package 51, a reflective sheet 60, and a diffuser 31. The optical sheet 32 ​​may be located in front of the optical layer OL.

[0057] The substrate 40 may have the shape of a plurality of strips extending in the left-right direction and spaced apart from each other in the up-down direction. Alternatively, the substrate 40 may also have the shape of a plurality of strips extending in the up-down direction and spaced apart from each other in the left-right direction. Alternatively, the substrate 40 may also have various shapes such as plates, forks, or serrations. At least one optical package 51 may be mounted on the substrate 40. Electrode patterns may be formed on the substrate 40, connecting the adapter and the optical package 51. For example, the electrode patterns may be carbon nanotube electrode patterns. The substrate 40 may be made of at least one of polyethylene terephthalate (PET), glass, polycarbonate (PC), silicon, and aluminum (Al). The substrate 40 may be a PCB (Printed Circuit Board) for mounting at least one optical package 51.

[0058] The light package 51 can be a package having a plurality of light-emitting diode (LED) chips. The LED chips can be sub-millimeter light-emitting diode (mini LED) chips. The light package 51 can be referred to as LED package 51 or light assembly 51. The light package 51 can be composed of colored LEDs or white LEDs that emit at least one color selected from red, green, and blue. The colored LEDs can include at least one of red LEDs, green LEDs, and blue LEDs.

[0059] The reflective sheet 60 may be located in front of the substrate 40. At least one hole 60h may be formed through the reflective sheet 60, and the optical package 51 may be located in the hole 60h. The reflective sheet 60 may reflect light supplied from the optical package 51 or reflected from the diffuser plate 31 forward. For example, the reflective sheet 60 may contain a metal and / or metal oxide with high reflectivity, such as at least one of aluminum (Al), silver (Ag), gold (Au), and titanium dioxide (TiO2).

[0060] Furthermore, an air gap can be formed between the reflector 60 and the diffuser 31. This air gap acts as a buffer, allowing light supplied from the optical package 51 to diffuse widely. A support member 39 can be located between the reflector 60 and the diffuser 31, forming the air gap.

[0061] The diffuser plate 31 can be located in front of the reflector 60. The diffuser plate 31 can be located between the reflector 60 and the optical sheet 32.

[0062] Optical sheet 32 ​​may include at least one sheet. For example, optical sheet 32 ​​may include more than one prism sheet and / or more than one diffuser sheet. The plurality of sheets of optical sheet 32 ​​may be bonded or attached to each other.

[0063] Specifically, the optical sheet 32 ​​can be composed of a plurality of sheets having different functions. For example, the optical sheet 32 ​​may include a first optical sheet 32a, a second optical sheet 32b, and a third optical sheet 32c. For example, the first optical sheet 32a may be a diffuser, and the second optical sheet 32b and the third optical sheet 32c may be prism sheets. The diffuser can diffuse the light distribution more evenly by preventing the light emitted from the diffuser plate 31 from being locally concentrated. The prism sheet can concentrate the light emitted from the diffuser plate 31 and provide it to the display panel 10. On the other hand, the number and / or position of the diffuser and the prism sheet can be changed.

[0064] Reference Figures 5 to 7 Board P can be mounted on frame 80. Multiple electronic components can be mounted on board P. Board P can be a PCB (Printed Circuit Board) and can be electrically connected to the electronic components of the display device. Multiple boards P can be combined at the rear of frame 80.

[0065] The power supply board P1 supplies power to the various components of the display device. The main board P3 controls the various components of the display device. The timing controller board P4 can be connected to the main board P3 via a cable and can provide image signals to the display panel 10.

[0066] The substrate 40 can be attached to the front side of the frame 80. For example, the substrate 40 can be in the shape of a bar, and the substrate 40 can extend horizontally. Alternatively, the substrate 40 can also extend vertically or diagonally. A plurality of substrates 40 can be spaced apart from each other in a direction intersecting the length direction of the substrate 40. Each of the plurality of substrates 40 can include a plurality of light packages 51, which can be referred to as a light source array 51 or an LED (Light Emitting Diode) array 51.

[0067] The extension board 59 may extend in a direction intersecting with the plurality of substrates 40. The extension board 59 may extend in a vertical direction. For example, the plurality of substrates 40 may extend from one long side of the extension board 59 in a direction intersecting with the extension board 59 (e.g., horizontally). For example, the plurality of substrates 40 may include a plurality of first substrates 40L and a plurality of second substrates 40R opposite to each other with respect to the extension board 59. The plurality of first substrates 40L and the plurality of second substrates 40R may be configured to be aligned or offset from each other in the width direction of the extension board 59.

[0068] A plurality of mounting connectors 59z can be mounted on expansion board 59. The plurality of mounting connectors 59z can be attached to the front side of expansion board 59 via SMT (Surface Mount Technology). The plurality of mounting connectors 59z can be spaced apart from each other along the length of expansion board 59.

[0069] A plurality of first substrates 40La, 40Lb, 40Lc, 40Ld, 40Le, 40Lf, 40Lg, 40Lh, and 40Li can be adjacent to the left side of the expansion board 59 and can be electrically connected to a plurality of mounting connectors 59z of the expansion board 59 through a plurality of first connectors 40Lz.

[0070] A plurality of second substrates 40Ra, 40Rb, 40Rc, 40Rd, 40Re, 40Rf, 40Rg, 40Rh, and 40Ri can be adjacent to the right side of the expansion board 59 and can be electrically connected to a plurality of mounting connectors 59z of the expansion board 59 through a plurality of second connectors 40Rz.

[0071] Power board P1 can be electrically connected to cable F1, which can be electrically connected to connector 59i of expansion board 59 through hole 81i in frame 80. Main board P3 can be electrically connected to cable F3, which can be electrically connected to connector 59i of expansion board 59 through hole 81i in frame 80. Connector 59i can be located on the back of expansion board 59. The plurality of cables F1 and F3 can be a plurality of FFC (Flexible Flat Cables). Thus, expansion board 59 can receive power and / or signals from power board P1 and main board P3.

[0072] Processor C can be mounted on expansion board 59. Processor C can be an MCU (Micro Controller Unit). Processor C can be referred to as controller C. A plurality of driver ICs (U, Integrated Circuits) can be mounted on a plurality of substrates 40. Each of the plurality of substrates 40 can have at least one driver IC (U). Processor C can convert (process) data received from motherboard P3 regarding the image quality (e.g., brightness) of the plurality of optical packages 51 and provide it to the plurality of driver ICs (U). The plurality of driver ICs (U) can adjust the brightness of the plurality of optical packages 51 based on the data received from processor C.

[0073] For example, a plurality of optical packages 51 can be arranged in a row on each substrate 40. The plurality of optical packages 51 on each substrate 40 can form a local dimming block in N units. Here, N is a natural number greater than 1. For example, each of the plurality of optical packages 51 on the first substrate 40L can form a local dimming block, or two or more optical packages 51 can be bundled together to form a local dimming block. A plurality of driver ICs(U) can adjust the brightness of the plurality of optical packages 51 belonging to each local dimming block by adjusting the amount of current flowing in the plurality of optical packages 51 or by blocking the flow of current, thereby realizing local dimming.

[0074] Reference Figure 8 The light package 51" may include a lead frame 510", a light source 511", a wall 512", and an encapsulation 514". The encapsulation 514 can be referred to as encapsulant 514 in English. The light package 51" can be referred to as LED package 51" or light assembly 51". Alternatively, the encapsulation 514" can be omitted.

[0075] The lead frame 510” can be located on the substrate 40 and can be electrically connected to the substrate 40. The lead frame 510” can be a die of the optical package 51”. For example, the lead frame 510” can contain a conductive material such as copper (Cu).

[0076] The light source 511” can be an LED chip 511”. The light source 511” can be mounted on the lead frame 510” and can be electrically connected to the lead frame 510”. The light source 511” can be a cuboid-shaped chip, and the five faces of the light source 511” other than the bottom face can emit light.

[0077] The wall 512” can be mounted on the lead frame 510” and can surround the side of the light source 511”. The wall 512” can be referred to as a cup 512”, a cover 512”, or a mold 512”. The package 514” can fill the receiving part of the wall 512” and can cover the light source 511”. The package 514” can be made of silicone or resin material.

[0078] A phosphor 515” may be located around a light source 511”. For example, a package 514” containing a liquid phase of phosphor 515” may cover and solidify the light source 511”. For example, the light from the light source 511” may be blue light, and the phosphor 515” may include a yellow phosphor. The phosphor 515” may also include a red phosphor. The yellow phosphor may be referred to as a yellow QD (Quantum Dot), and the red phosphor may be referred to as a red QD. In this case, the light from the light source 511” can excite the yellow phosphor and the red phosphor. The yellow and red light emitted from the phosphor 515” in the package 514” can mix with the blue light from the light source 511” passing through the package 514” without being absorbed or reflected by the phosphor 515”. Alternatively, the phosphor 515” may be omitted.

[0079] Thus, the light source 511” of the light package 51” can provide light.

[0080] Lens 53” may cover optical package 51”. Lens 53” may be bonded to or attached to substrate 40. Lens 53” may be made of plastic or resin material. For example, lens 53” may be made of PMMA (Polymethyl Methacrylate). Lens 53” viewed from the front may have a circular or elliptical shape. The longitudinal section of lens 53” may have the shape of two humps of a Bactrian camel. Lens 53” may include a dome part 531”, a rear groove 533”, and a front groove 534”. The rear groove 533” and the front groove 534” may be formed in the central part of lens 53”. The portion of lens 53” with the rear groove 533” and the front groove 534” may be referred to as the middle part 532.

[0081] The dome portion 531” can have a convex dome shape. The front surface 531F” of the dome portion 531” can be curved, and the back surface 531R” of the dome portion 531” can be flat. The dome portion 531” can form the outer circle of the lens 53” when viewed from the front. The width W1” of the dome portion 531” can be greater than the height H1” of the dome portion 531”. The width W1” can be the same as the diameter of the lens 53”, and the portion of the dome portion 531” located at a predetermined distance Rx” from the center Cx” of the lens 53” can define the height H1”. The width W1” and the height H1” can be the maximum width and maximum height of the lens 53”.

[0082] The rear recess 533” can be recessed from the back side 531R” of the dome portion 531”. The rear recess 533” can be a recessed groove relative to the back side 531R”. The rear recess 533” can be a cup-shaped groove.

[0083] The front recess 534” can be recessed from the front side 531F” of the dome portion 531”. The front recess 534” can be a recessed groove relative to the front side 531F”. The front recess 534” can be a funnel-shaped groove.

[0084] The vertical plane VS” can be a plane that passes through the center Cx” of lens 53” and intersects with lens 53”. The center Cx” of lens 53” can be formed in the middle portion 532, and the vertical plane VS” can be the yz plane. The first portion 53a” and the second portion 53b” of lens 53” can be symmetrical to each other with respect to the vertical plane VS”. In other words, each of the first portion 53a” and the second portion 53b” can be equivalent to half of lens 53”.

[0085] The light source 51” can be located in the rear recess 533”. The center of the light source 511” can be aligned with the vertical plane VS” of the center Cx” of the lens 53”. Light from the light source 511” can pass through the rear recess 533”. The surface of the rear recess 533” can be referred to as the light-incident surface.

[0086] Therefore, light incident from light source 511” onto the recessed rear groove 533” can be refracted at angles θ12” and θ22” larger than the incident angle. That is, light incident on the rear groove 533” can be refracted along the same path as the incident light (refer to...). Figure 8 Compared to the direction where the angle increases (refer to P11”, P21”), the angle increases (refer to the direction where the angle increases). Figure 8 (Refraction of P12”, P22”).

[0087] Light incident on the rear groove 533” can pass through the interior of the lens 53” and through the front surface 531F” and / or the front groove 534” of the dome portion 531”. The front surface 531F” and the front groove 534” can be referred to as a plurality of light-emitting surfaces 531F”, 534”.

[0088] Therefore, light from light source 511” passing through the recessed front groove 534” can be refracted at an angle θ13” larger than the entry angle. That is, light emitted from the front groove 534” can be directed towards the existing light path (refer to...). Figure 8 Compared to the direction where the angle increases (see P12) Figure 8 The light from the light source 511” passing through the front surface 531F” of the dome portion 531” can be refracted at an angle θ23” larger than the angle of entry. That is, the light emitted from the front surface 531F” can be refracted in a direction that is different from the existing light path (see P13”). Figure 8 Compared to the direction where the angle increases (see P22) Figure 8 (refractive P23)

[0089] As described above, the light from the light source 511” can be diffused by the lens 53” with a wide pointing angle.

[0090] Reference Figures 9 to 11 A plurality of light packages 51” can provide light to the display panel 10. Diffuser plate (see reference) Figure 4 )31 and optical plates (refer to) Figure 4 )32 can be located between the plurality of optical packages 51” and the display panel 10. Each of the plurality of lenses 53” can cover each of the plurality of optical packages 51”, and the light from the optical packages 51” can be diffused at a wide directional angle by refraction or reflection by the lenses 53”.

[0091] For example, each of the plurality of optical packages 51” can form a local dimming block BL”. In other words, the brightness of each optical package 51” can be controlled individually. The plurality of local dimming blocks BL” can be arranged in a matrix form corresponding to the arrangement of the plurality of optical packages 51”. For example, the plurality of local dimming blocks BL” can be composed of 10 rows R1, R2, R3, R4, R5, R6, R7, R8, R9, R10 and 16 columns C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16.

[0092] The display panel 10 can be divided into a plurality of regions A corresponding to a plurality of local dimming blocks BL”. The light from each local dimming block BL” can be directed towards each region A. In other words, in order to output an image to a specific region of the display panel 10, a specific local dimming block can provide light to said specific region. Each region A can be composed of a plurality of pixels of the display panel 10.

[0093] For example, the light source 511” of the first optical package 51a” forming the first local dimming block BLb” can provide light to the first region Aa of the display panel 10. The light source 511” of the second optical package 51b” forming the second local dimming block BLb” can provide light to the second region Ab of the display panel 10. The light source 511” of the third optical package 51c” forming the third local dimming block BLc” can provide light to the third region Ac of the display panel 10.

[0094] For example, the display panel 10 can output an image of a bright moon A2 located in the center of a black background A1.

[0095] Multiple first local dimming blocks BL1 (refer to) Figure 10 The plurality of light packages 51” of the plurality of first local dimming blocks BL1” can correspond to the black background A1 portion of the display panel 10, and thus the plurality of light packages 51” of the plurality of first local dimming blocks BL1” can be not driven, so as not to emit light.

[0096] Multiple second local dimming blocks BL2 (refer to) Figure 10 The light source 51” of the plurality of second local dimming blocks BL2” can correspond to most of the bright moon A2 of the display panel 10, and can be driven to provide light to most of the bright moon A2 of the display panel 10. However, the light from the plurality of second local dimming blocks BL2” may not be provided to the edge portion of the bright moon A2 of the display panel 10.

[0097] Multiple third local dimming blocks BL3 (refer to) Figure 10The plurality of light packages 51” of the plurality of third local dimming blocks BL3” can correspond to the edge portion of the bright moon A2 of the display panel 10, thereby providing light to the edge portion of the bright moon A2 of the display panel 10. However, the light from the plurality of third local dimming blocks BL3” can also be provided to the black background A1 portion of the display panel 10, which may result in light diffusion around the bright moon A2, i.e., a halo phenomenon.

[0098] Reference Figure 12 and Figure 13 The optical package 51 may include a lead frame 510, a plurality of light sources 511, a wall 512, a partition wall 513, and an encapsulation 514. The encapsulation 514 may be referred to as encapsulant 514. The encapsulation 514 may also be omitted.

[0099] The lead frame 510 can be located on the substrate 40 and can be electrically connected to the substrate 40. For example, the lead frame 510 can contain a conductive material such as copper (Cu).

[0100] The plurality of light sources 511 can be a plurality of LED chips 511 (Light Emitting Diode Chips). The plurality of light sources 511 can be mounted on a lead frame 510 and electrically connected to the lead frame 510. The first light source 511a and the second light source 511b can be spaced apart from each other. Each light source 511 can be a cuboid-shaped chip, and all five faces of the light source 511, excluding the bottom face, can emit light. The plurality of light sources 511 can be of the same size.

[0101] A wall 512 can be mounted on the lead frame 510 and can surround the sides of a plurality of light sources 511. The wall 512 can be referred to as a cup 512, a cover 512, or a mold 512. A partition wall 513 can be located between the first light source 511a and the second light source 511b. The partition wall 513 can block the light from the first light source 511a from traveling towards the area in front of the second light source 511b, and can also block the light from the second light source 511b from traveling towards the area in front of the first light source 511a. A package 514 can fill the receiving portion of the wall 512 and can cover the plurality of light sources 511. The package 514 can be made of silicone or resin material.

[0102] A phosphor 515 may be located around a plurality of light sources 511. For example, a package 514 containing a liquid phase of phosphor 515 may cover and solidify the light sources 511. For example, the light from the light source 511 may be blue light, and the phosphor 515 may include a yellow phosphor. The phosphor 515 may also include a red phosphor. The yellow phosphor may be referred to as a yellow QD (Quantum Dot), and the red phosphor may be referred to as a red QD. In this case, the light from the light source 511 may excite the yellow phosphor and the red phosphor. The yellow and red light emitted from the phosphor 515 of the package 514 may mix with the blue light from the light source 511 passing through the package 514 without being absorbed or reflected by the phosphor 515. Alternatively, the phosphor 515 may be omitted.

[0103] Therefore, the first light source 511a and the second light source 511b of the optical package 51 can provide light. At this time, the area in front of the optical package 51 may include a first area La reached by the light from the first light source 511a and a second area Lb reached by the light from the second light source 511b. Alternatively, the first light source 511a may be driven while the second light source 511b is not driven, and the optical package 51 can form the first area La. Alternatively, the second light source 511b may be driven while the first light source 511a is not driven, and the optical package 51 can form the second area La.

[0104] Reference Figures 14 to 16 A plurality of light packages 51 can provide light to the display panel 10. Diffuser plate 31 (see reference) Figure 4 ) and optical plate 32 (refer to) Figure 4 The lens 53 can be located between a plurality of light packages 51 and the display panel 10. Each of the plurality of lenses 53 can cover each of the plurality of light packages 51, and the light from the light package 51 can be diffused at a wide directional angle by refraction or reflection by the lens 53.

[0105] For example, each of the plurality of light sources 511 in each optical package 51 can form a local dimming block BL. In other words, the brightness of each light source 511 in each optical package 51 can be controlled individually. The plurality of local dimming blocks BL can be arranged in a matrix form corresponding to the arrangement of the plurality of light sources 511 in the plurality of optical packages 51. For example, the local dimming block BL can be composed of 10 rows R1, R2, R3, R4, R5, R6, R7, R8, R9, R10 and 32 columns C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31, C32. The optical package 51 may include two light sources 511 arranged in a horizontal direction, and may form a plurality of local dimming blocks BL, which are twice the size of the optical package 51” containing one light source 511”.

[0106] The display panel 10 can be divided into a plurality of regions A corresponding to a plurality of local dimming blocks BL. Light from each local dimming block BL can be directed towards its respective region A. In other words, in order to output an image to a specific region of the display panel 10, a specific local dimming block can provide light to said specific region. Each region A can be composed of a plurality of pixels of the display panel 10.

[0107] For example, the light from the first light source 511a forming the first optical package 51a of the first local dimming block BL1 can be provided to the first region Aa of the display panel 10. The light from the second light source 511b forming the first optical package 51a of the second local dimming block BL1 can be provided to the second region Ab of the display panel 10. The light from the first light source 511a forming the second optical package 51b of the third local dimming block BL1 can be provided to the third region Ac of the display panel 10. The light from the second light source 511b forming the second optical package 51b of the fourth local dimming block BL2 can be provided to the fourth region Ad of the display panel 10. The light from the first light source 511a forming the third optical package 51c of the fifth local dimming block BL1 can be provided to the fifth region Ae of the display panel 10. The light from the second light source 511b forming the third optical package 51c of the sixth local dimming block BL2 can be provided to the sixth region Af of the display panel 10.

[0108] For example, the display panel 10 can output an image of a bright moon A2 located in the center of a black background A1.

[0109] Multiple first local dimming blocks BL1 (refer to) Figure 15 The plurality of light packages 51 of the plurality of first local dimming blocks BL1 can correspond to the black background A1 portion of the display panel 10, and thus not be driven, so as not to emit light.

[0110] Multiple second local dimming blocks BL2 (refer to) Figure 15 The light source 51 of the plurality of second local dimming blocks BL2 can be driven to correspond to most of the bright moon A2 of the display panel 10, thereby providing light to most of the bright moon A2 of the display panel 10. However, the light from the plurality of second local dimming blocks BL2 may not be provided to the edge portion of the bright moon A2 of the display panel 10.

[0111] Multiple third local dimming blocks BL3 (refer to) Figure 10 The plurality of light packages 51 of the plurality of third local dimming blocks BL3 can be driven to provide light to the edge portion of the bright moon A2 of the display panel 10, corresponding to the edge portion of the bright moon A2 of the display panel 10. At this time, in the plurality of third local dimming blocks BL3 located in the 9th column C9 and the 10th column C10, the plurality of first light sources 511a can be driven to provide light, while the plurality of second light sources 511b can be de-driven. Here, the plurality of first light sources 511a can be the plurality of light sources in the 10th column C10 of the plurality of second local dimming blocks BL2. In addition, in the plurality of third local dimming blocks BL3 located in the 24th column C24 and the 25th column C25, the plurality of second light sources 511b can be driven to provide light, while the plurality of first light sources 511a can be de-driven. Here, the plurality of second light sources 511b can be a plurality of light sources facing the 24th column C24 of the plurality of second local dimming blocks BL2.

[0112] This minimizes the amount of light supplied to the black background A1 portion of the display panel 10 by the third local dimming block BL3, resulting in a reduction of light diffusion around the bright moon A2, i.e., halo phenomenon.

[0113] Reference Figure 17 and Figure 18 The substrate 40 may include a base 41 and a conductive layer 42. For example, the base 41 may be made of aluminum (Al). For example, the conductive layer 42 may be made of copper (Cu) and may be formed on the surface of the base 41. The conductive layer 42 may be referred to as the circuit layer 42.

[0114] The optical package 51 may include a lead frame 510, a spacer 510S, a plurality of light sources 511a, 511b, a wall 512, a partition wall 513, and an encapsulation 514. The encapsulation 514 may be referred to as encapsulant 514. The encapsulation 514 may also be omitted. The optical package 51 may be a square or rectangular assembly.

[0115] The lead frame 510 can be located on the conductive layer 42 and can be electrically connected to the conductive layer 42. The lead frame 510 can be a die of the optical package 51. For example, the lead frame 510 can contain a conductive material such as copper (Cu). The first to fourth lead frames 510a, 510b, 510c, and 510d can be arranged in a 2×2 matrix, and can be adjacent to each other and spaced apart from each other.

[0116] Spacers 510S can be fixed or formed on the substrate 40 and can be located between the first lead frame to the fourth lead frame 510a, 510b, 510c, 510d. A first spacer 510Sa, which is longer in the transverse direction, can be located between the first lead frame 510a and the second lead frame 510b, and also between the third lead frame 510c and the fourth lead frame 510d. A second spacer 510Sb, which is longer in the longitudinal direction, can be located between the first lead frame 510a and the third lead frame 510c, and also between the second lead frame 510b and the fourth lead frame 510d. Spacers 510S can be made of resin. For example, spacer 510S may contain PCT (Polycyclohexylene Dimethylene Terephthalate) or EMC (Epoxy Molding Compound) material.

[0117] The first light source 511a can be mounted on the first lead frame 510a and the second lead frame 510b. One side of the first light source 511a can be electrically connected to the first lead frame 510a, and the other side of the first light source 511a can be electrically connected to the second lead frame 510b.

[0118] The second light source 511b can be mounted on the third lead frame 510c and the fourth lead frame 510d. One side of the second light source 511b can be electrically connected to the third lead frame 510c, and the other side of the second light source 511b can be electrically connected to the fourth lead frame 510d.

[0119] Therefore, an optical package 51 can include two light sources 511a and 511b, each of which can be controlled independently. For example, the light source 511 can be a cuboid-shaped chip. For example, the long side of the first light source 511a and the long side of the second light source 511b can face each other.

[0120] Wall 512 may be located on lead frame 510. Wall 512 may be formed or fixed on lead frame 510. Wall 512 may be configured along the periphery of lead frame 510. Wall 512 may surround the sides of a plurality of light sources 511a, 511b. Wall 512 may be a quadrilateral wall. First portion 512a of wall 512 may extend along first lead frame 510a and second lead frame 510b. Second portion 512b of wall 512 may extend along third lead frame 510c and fourth lead frame 510d. Third portion 512c of wall 512 may extend along first lead frame 510a and third lead frame 510c. Fourth portion 512d of wall 512 may extend along second lead frame 510b and fourth lead frame 510d. Wall 512 may contain an opaque material. Wall 512 may contain a resin material. For example, wall 512 can contain PCT (Polycyclohexylene Dimethylene Terephthalate) or EMC (Epoxy Molding Compound) material.

[0121] The partition wall 513 may be located between the first light source 511a and the second light source 511b. The partition wall 513 may extend along the second spacer 510Sb. The partition wall 513 may protrude from the second spacer 510Sb. The partition wall 513 and the second spacer 510Sb may be formed as a single body. The partition wall 513 may contain an opaque material. The partition wall 513 may contain a resin material. For example, the partition wall 513 may contain PCT (Polycyclohexylene Dimethylene Terephthalate) or EMC (Epoxy Molding Compound) material.

[0122] As described above and as will be said below, the light distributions of the first light source 511a and the second light source 511b can be separated by the partition wall 513. The separation membrane can be located at a reference... Figure 20 The vertical surface VS of lens 53, described later, can replace or, together with partition wall 513, separate the light distributions of the first light source 511a and the second light source 511b. The separation film may contain a reflective material. The separation film may be a mirror.

[0123] The first package 514a can fill the space between the partition wall 513 and the first portion 512a of the wall 512, and can cover the first light source 511a. A portion of the third portion 512c between the partition wall 513 and the first portion 512a, a portion of the fourth portion 512d between the partition wall 513 and the first portion 512a, the first portion 512a, and the partition wall 513 can form a receiving space (receiving part) for the first package 514a. The first package 514a can contain a light-transmitting material. The first package 514a can contain silicone or resin material. For example, a first phosphor can be incorporated into the first package 514a.

[0124] The second package 514b can fill the space between the partition wall 513 and the second portion 512b of the wall 512, and can cover the second light source 511b. A portion of the third portion 512c between the partition wall 513 and the second portion 512b, a portion of the fourth portion 512d between the partition wall 513 and the second portion 512b, the second portion 512b, and the partition wall 513 can form a receiving space (receiving part) for the second package 514b. The second package 514b can contain a light-transmitting material. The second package 514b can contain silicone or resin material. For example, a second phosphor can be incorporated into the second package 514b.

[0125] Reference Figure 19 and Figure 20 Lens 53 may cover optical package 51. Lens 53 may be bonded to or attached to substrate 40. Lens 53 may be made of plastic or resin material. For example, lens 53 may be made of PMMA (Polymethyl Methacrylate). Lens 53 viewed from the front may have a circular or elliptical shape. The longitudinal section VV' of lens 53 may generally have a handset shape. Lens 53 may include a dome part 531, a rear groove 533, and a front groove 534. The rear groove 533 and the front groove 534 may be formed in the central part of lens 53. The portion of lens 53 in which the rear groove 533 and the front groove 534 are formed may be referred to as the middle part 532.

[0126] The dome portion 531 can have a convex dome shape. The front surface 531F of the dome portion 531 can be curved, and the back surface 531R of the dome portion 531 can be flat. The dome portion 531 can form the outer circle 53V of the lens 53 when viewed from the front. The width W1 of the dome portion 531 can be greater than the height H1 of the dome portion 531. The width W1 can be the same as the diameter of the outer circle 53V, and the portion of the dome portion 531 located at a predetermined distance Rx from the center Cx of the lens 53 can define the height H1. The width W1 and the height H1 can be the maximum width and maximum height of the lens 53.

[0127] The rear recess 533 can be recessed from the back surface 531R of the dome portion 531. The rear recess 533 may include a first surface 5331 and a second surface 5332. The first surface 5331 may form the bottom of the rear recess 533, and the second surface 5332 may extend along the periphery of the first surface 5331 to form the sidewall of the rear recess 533. The second surface 5332 may be connected to the back surface 531R of the dome portion 531. The second surface 5332 may be a recessed curved surface.

[0128] The front recess 534 can be recessed from the front surface 531F of the dome portion 531. The front recess 534 may include a first surface 5341 and a second surface 5342. The first surface 5341 may form the bottom of the front recess 534, and the second surface 5342 may extend along the periphery of the first surface 5341 to form the sidewall of the front recess 534. The second surface 5342 may be connected to the front surface 531F of the dome portion 531. The second surface 5342 may be a convex curved surface. The first surface 5341 may form the inner circle 53W of the lens 53 when viewed from the front.

[0129] The vertical plane VS can be a plane that passes through the center Cx of lens 53 and intersects with lens 53. The center Cx of lens 53 can be formed in the middle portion 532, and the vertical plane VS can be the yz plane. The first portion 53a and the second portion 53b of lens 53 can be symmetrical to each other with respect to the vertical plane VS. In other words, each of the first portion 53a and the second portion 53b can be equivalent to half of lens 53.

[0130] The optical package 51 can be located in the rear recess 533. The optical package 51 can be separated from the bottom of the rear recess 533, i.e., the first surface 5331. The distance between the light source 511 of the optical package 51 and the first surface 5331 can be approximately 1 mm. A plurality of light sources 511a and 511b can be directed toward the first surface 5331 of the rear recess 533. The light from the plurality of light sources 511a and 511b can pass through the first surface 5331 and the second surface 5332 of the rear recess 533. The first surface 5331 and the second surface 5332 can be referred to as the incident light surfaces 5331 and 5332. The partition wall 513 can be aligned with the vertical plane VS passing through the center Cx of the lens 53. The first surface 5331 can have a circular or elliptical shape, and the vertical plane VS can pass through the center of the first surface 5331. The first light source 511a can be directed toward the semicircular portion of the first surface 5331, and the second light source 511b can be directed toward the remaining semicircular portion of the first surface. For example, the first surface 5331 can be a curved surface protruding towards the light-emitting package 51. Alternatively, the first surface 5331 can be a flat surface 5331'.

[0131] Therefore, the light incident on the first surfaces 5331 and 5331' from the light source 511 can be refracted at an angle θ12 smaller than the incident angle. That is, the light incident on the first surfaces 5331 and 5331' can be refracted along the same path as the incident light (refer to...). Figure 20 Compared to the direction where the angle decreases (refer to P11) Figure 20 (P12) Refraction. Light incident on the second surface 5332 formed by the concave curved surface of the light source 511 can be refracted at an angle θ22 larger than the angle of incidence. That is, light incident on the second surface 5332 can be refracted in a direction different from the incident light path (P12). Figure 20 (Refer to P21) Compared to the direction where the angle increases (refer to P21) Figure 20 (P22) refraction.

[0132] Light from the plurality of light sources 511a, 511b of the optical package 51 can pass through the front surface of the lens 53. The first surface 5341, the second surface 5342 of the front recess 534, and the front surface 531F of the dome portion 531 can form the front surface of the lens 53. The first surface 5341, the second surface 5342, and the front surface 531F can be referred to as the plurality of light-emitting surfaces 5341, 5342, and 531F. The first surface 5341 can have a circular or elliptical shape, and the perpendicular plane VS passing through the center Cx of the lens 53 can pass through the center of the first surface 5341. For example, the first surface 5341 can be a plane. As another example, the first surface 5341 can be a curved surface 5341' recessed towards the first surface 5331.

[0133] Therefore, light passing through the light source 511 of the first surfaces 5341 and 5341' can be refracted at an angle θ13 smaller than the angle of entry. That is, light emitted from the first surfaces 5341 and 5341' can be refracted in a direction similar to the existing light path (refer to...). Figure 20Compared to the direction where the angle decreases (see P12) Figure 20 (P13) Refraction. Light from the light source 511 passing through the second surface 5342 or the front surface 531F can be refracted at an angle θ23 larger than the angle of entry. That is, light emitted from the second surface 5342 or the front surface 531F can be refracted in a direction consistent with the existing light path (refer to P13). Figure 20 Compared to the direction where the angle increases (see P22) Figure 20 (P23) refraction.

[0134] The light from the first light source 511a can pass through the first package 514a and can be guided by the wall 512 and the partition wall 513. In particular, the partition wall 513, aligned with the vertical plane VS of the lens 53, can be positioned on the path of the light from the first light source 511a behind the first portion 53a of the lens 53 toward the second portion 53b of the lens 53. That is, the partition wall 513 can reflect or refract the light from the first light source 511a, thereby reducing the amount (ratio) of the light from the first light source 511a incident on the second portion 53b side of the lens 53.

[0135] However, a portion of the light from the first light source 511a can also be incident on the first surface 5331 of the second portion 53b of the lens 53. In this case, the light incident on the first surface 5331 of the second portion 53b can be refracted at an angle smaller than the incident angle, and can exit from the first surface 5341 of the second portion 53b at an angle smaller than the angle of refraction (see reference). Figure 20 (P11, P12, P13). Thus, the light from the first light source 511a passing through the first part 53a of the lens 53 can be widely diffused by the first part 53a to form a relatively wide light distribution area, while the light from the first light source 511a passing through the second part 53b of the lens 53 can form a relatively narrow light distribution area.

[0136] The light from the second light source 511b can be guided by the second package 514b, and by the wall 512 and the partition wall 513. Specifically, the partition wall 513, aligned with the vertical plane VS of the lens 53, can be positioned behind the second portion 53b of the lens 53 on the path of the light from the second light source 511b toward the first portion 53a of the lens 53. That is, the partition wall 513 can reflect or refract the light from the second light source 511b, thereby reducing the amount (ratio) of light from the second light source 511b incident on the first portion 53a side of the lens 53.

[0137] However, a portion of the light from the second light source 511b can also be incident on the first surface 5331 of the first portion 53a. In this case, the light incident on the first surface 5331 of the first portion 53a can be refracted at an angle smaller than the incident angle, and can exit from the first surface 5341 of the first portion 53a at an angle smaller than the angle of refraction (see reference). Figure 20 (P11, P12, P13). Thus, the light from the second light source 511b passing through the second part 53b of the lens 53 can be widely diffused by the second part 53b to form a relatively wide light distribution area, while the light from the second light source 511b passing through the first part 53a of the lens 53 can form a relatively narrow light distribution area.

[0138] A portion of the light from the first light source 511a and a portion of the light from the second light source 511b can pass through the first surface 5341 of the front groove 534. That is, on the first surface 5341, the light from the first light source 511a and the light from the second light source 511b can overlap. The overlapping light can pass through the pattern.

[0139] For example, the pattern can be formed on the first surface 5341. The pattern can be a plurality of protrusions or a plurality of grooves. The protrusions of the pattern can be prism or cylindrical in shape. Alternatively, the pattern can be a scatter or adhered powder or granules to the first surface 5341. The vicinity of the first surface 5341 may appear hazy due to the powder or granules.

[0140] For example, the pattern may be adjacent to the first surface 5341. The pattern may be located inside the lens 53, adjacent to the first surface 5341. Alternatively, the pattern may be located outside the lens 53, on the first surface 5341. The pattern may be a thin film or sheet located inside or outside the lens 53. The thin film or sheet may have a shape corresponding to the first surface 5341 (i.e., a circular shape), and may have a plurality of protrusions, a plurality of grooves, powder, or particles. Alternatively, the pattern may be powder or particles located inside the lens 53. The vicinity of the first surface 5341 may appear hazy due to the powder or particles.

[0141] Therefore, the pattern allows light from the first light source 511a and the second light source 511b passing through the pattern to diffuse softly. As a result, the phenomenon that the vicinity of the first surface 5341 appears brighter than other areas due to light overlap can be minimized. In addition, mura can be minimized.

[0142] Reference Figure 21The optical package 51 may include a first cavity 51Ca between a partition wall 513 and a first portion 512a of a wall 512, and a second cavity 51Cb between a partition wall 513 and a second portion 512b of a wall 512. A first light source 511a may be located in the first cavity 51Ca, which may be a receiving space (receiving portion) for filling a first package 514a. A second light source 511b may be located in the second cavity 51Cb, which may be a receiving space (receiving portion) for filling a second package 514b. The first cavity 51Ca may be referred to as the first light-emitting cavity 51Ca, and the second cavity 51Cb may be referred to as the second light-emitting cavity 51Cb. The first cavity 51Ca and the second cavity 51Cb may be collectively referred to as a plurality of light-generating portions 51Ca and 51Cb.

[0143] The light from the first light source 511a and the second light source 511b can be provided to the diffuser plate 31. The light from the first light source 511a and the second light source 511b can be filtered by the lens 53 (see reference). Figure 20 Refraction or reflection. The central axis Z3 of the partition wall 513 of the optical package 51 can pass through the center of the partition wall 513 and can be parallel to the front-back direction. The central axis Z3 can belong to the plane S3 (i.e., the yz plane) passing through the center of the partition wall 513. A portion of the light from the first light source 511a can be provided to a portion of the diffuser plate 31 in front of the second light source 511b through the virtual plane S3. A portion of the light from the second light source 511b can be provided to a portion of the diffuser plate 31 in front of the first light source 511a through the virtual plane S3. The space between the optical package 51 and the diffuser plate 31 can be called the light mixing section.

[0144] The central axis Za of the first chamber 51Ca can pass through the center of the first chamber 51Ca and can be parallel to the front-back direction. The central axis Za can belong to the plane Sa (i.e., the yz plane) passing through the center of the first chamber 51Ca. The first edge E1 of the front of the first part 512a of the wall 512 can face the first chamber 51Ca, and the first edge Ea of the front of the partition wall 513 can also face the first chamber 51Ca. The central axis Za can be located at the center of the first edge E1 and the first edge Ea. That is, the distance Daa between the central axis Za and the first edge E1 can be the same as the distance Dab between the central axis Za and the first edge Ea. The first sub-region 51Caa can be the region of the first chamber 51Ca located between the first edge E1 and the central axis Za. In other words, the first sub-region 51Caa can be the space between the plane S1 (i.e., the yz plane) to which the first edge E1 belongs and the plane Sa. The second sub-region 51Cab can be the region of the first chamber 51Ca located between the central axis Za and the first edge Ea. In other words, the second sub-region 51Cab can be the space between plane Sa and the yz plane to which the first edge Ea belongs.

[0145] The first light source 511a can be configured to be closer to the partition wall 513 than the first portion 512a of the wall 512. The center CLa of the first light source 511a can be separated (offset) from the central axis Za of the first chamber 51Ca towards the partition wall 513. The first light source 511a can be configured in the second sub-region 51Cab of the first chamber 51Ca. This reduces the amount (ratio) of light from the first light source 511a passing through the virtual plane S3 to the portion of the diffuser plate 31 in front of the second light source 511b.

[0146] The virtual plane S3 can divide the space between the light package 51 and the diffuser plate 31 into a first space Va facing the first chamber 51Ca and a second space Vb facing the second chamber 51Cb. Light from the first light source 511a can be distributed over a portion of the diffuser plate 31. A first backlight coverage area Vaa can correspond to the first space Va and can be the area from which light from the first light source 511a reaches the diffuser plate 31. A second backlight coverage area Vab can correspond to the second space Vb and can be the area from which light from the first light source 511a reaches the diffuser plate 31. The width Waa of the first backlight coverage area Vaa can be greater than the width Wab of the second backlight coverage area Vab. The first backlight coverage area Vaa can be referred to as a long backlight coverage area Vaa or a wide backlight coverage area Vaa. The second backlight coverage area Vab can be referred to as a short backlight coverage area Vab or a narrow backlight coverage area Vab.

[0147] For example, the distance Xa between the center CLa of the first light source 511a and the partition wall 513 can be determined by the following formula 1.

[0148] <Equation 1: Xa = (Wab·H11) / H12>, where the width Wab is the width of the second backlight coverage area Vab, the height H11 is the distance from the bottom of the first light source 511a to the end (i.e., the front end) of the partition wall 513, and the height H12 is the distance from the end (i.e., the front end) of the partition wall 513 to the back of the diffuser plate 31. The height H11 can be referred to as the height H11 of the partition wall 513, and the height H12 can be referred to as the optical depth H12 or the optical distance H12.

[0149] In this case, the smaller the width Wab of the second backlight coverage area Vab, the smaller the distance Xa can be. That is, in order to reduce the amount (ratio) of light provided by the first light source 511a to the portion of the diffuser 31 corresponding to the second space Vb, the first light source 511a can be moved towards the partition wall 513. For example, the ratio of the second backlight coverage area Vab to the first backlight coverage area Vaa can be 3:7. That is, the proportion of the second backlight coverage area Vab to the entire backlight coverage area (Vaa and Vab) can be 0.3 (i.e., 30%). The ratio can be 0.3 or less. The ratio of the width Wab of the second backlight coverage area Vab to the width (Waa+Wab) of the entire backlight coverage area (Vaa and Vab) can be 0.3 (i.e., 30%). The ratio can be 0.3 or less.

[0150] Therefore, the amount (ratio) of light from the first light source 511a supplied to the portion of the diffuser plate 31 corresponding to the second space Vb can be minimized or optimized. As a result, bright areas caused by excessive overlap between the light from the first light source 511a and the light from the second light source 511b can be minimized. In addition, mura can be minimized.

[0151] The central axis Zb of the second chamber 51Cb can pass through the center of the second chamber 51Cb and be parallel to the front-back direction. The central axis Zb can belong to the plane Sb (i.e., the yz plane) passing through the center of the second chamber 51Cb. The second edge Eb of the front of the partition wall 513 can face the second chamber 51Cb, and the second edge E2 of the second part 512b of the wall 512 can also face the second chamber 51Cb. The central axis Zb can be located at the center of the second edge Eb and the second edge E2. That is, the distance Dba between the central axis Zb and the second edge Eb can be the same as the distance Dbb between the central axis Zb and the second edge E2. The third sub-region 51Cba can be the region of the second chamber 51Cb located between the second edge Eb and the central axis Zb. In other words, the third sub-region 51Cba can be the space between the yz plane to which the second edge Eb belongs and the plane Sb. The fourth sub-region 51Cbb can be the region of the second chamber 51Cb located between the central axis Zb and the second edge E2. In other words, the fourth sub-region 51Cbb can be the space between plane Sb and plane S2 (i.e., the yz plane) to which the second edge E2 belongs.

[0152] The second light source 511b can be configured to be closer to the partition wall 513 than the second portion 512b of the wall 512. The center CLb of the second light source 511b can be separated (offset) from the central axis Zb of the second chamber 51Cb towards the partition wall 513. The second light source 511b can be configured in the third sub-region 51Cba of the second chamber 51Cb. This reduces the amount (ratio) of light from the second light source 511b passing through the virtual plane S3 to the portion of the diffuser plate 31 in front of the first light source 511a.

[0153] The virtual plane S3 can divide the space between the light package 51 and the diffuser plate 31 into a second space Vb facing the second chamber 51Cb and a first space Va facing the first chamber 51Ca. Light from the second light source 511b can be distributed over a portion of the diffuser plate 31. The first backlight coverage area Vba (light distribution coverage) can correspond to the second space Vb and can be the area from which light from the second light source 511b reaches the diffuser plate 31. The second backlight coverage area Vbb can correspond to the first space Va and can be the area from which light from the second light source 511b reaches the diffuser plate 31. The width Wba of the first backlight coverage area Vba can be referred to as the long backlight coverage area Vba or the wide backlight coverage area Vba. The second backlight coverage area Vbb can be referred to as the short backlight coverage area Vbb or the narrow backlight coverage area Vbb.

[0154] For example, the distance Xb between the center CLb of the second light source 511b and the partition wall 513 can be determined by the following formula 2.

[0155] <Equation 2: Xb=(Wbb·H11) / H12>, where the width Wbb is the width of the second backlight coverage area Vbb, the height H11 is the distance from the bottom of the second light source 511b to the end (i.e., the front end) of the partition wall 513, and the height H12 is the distance from the end (i.e., the front end) of the partition wall 513 to the back of the diffuser plate 31. The height H11 can be referred to as the height H11 of the partition wall 513, and the height H12 can be referred to as the optical depth H12 or the optical distance H12.

[0156] In this case, the smaller the width Wbb of the second backlight coverage area Vbb, the smaller the distance Xb can be. That is, in order to reduce the amount (ratio) of light provided by the second light source 511b to the portion of the diffuser plate 31 corresponding to the first space Va, the second light source 511b can be moved towards the partition wall 513. For example, the ratio of the second backlight coverage area Vbb to the first backlight coverage area Vba can be 3:7. That is, the proportion of the second backlight coverage area Vbb to the entire backlight coverage area (Vba and Vbb) can be 0.3 (i.e., 30%). The ratio can be 0.3 or less. The ratio of the width Wbb of the second backlight coverage area Vbb to the width (Wba+Wbb) of the entire backlight coverage area (Vba and Vbb) can be 0.3 (i.e., 30%). The ratio can be 0.3 or less.

[0157] Therefore, the amount (ratio) of light from the second light source 511b supplied to the portion of the diffuser plate 31 corresponding to the first space Va can be minimized or optimized. As a result, bright areas caused by excessive overlap between the light from the second light source 511b and the light from the first light source 511a can be minimized. In addition, mura can be minimized.

[0158] The inner surface 512G of the wall 512 can face the chambers 51Ca and 51Cb. The inner surface 512G can form an obtuse angle θg with respect to the lead frame 510 on which the wall 512 is mounted. The inner surface 512G can guide the light from the light sources 511a and 511b.

[0159] The partition wall 513 can have a quadrilateral cross-section. For example, the partition wall 513 can have a rectangular cross-section. Alternatively, the partition wall 513 can have a trapezoidal cross-section. In this case, the bottom (i.e., the back side) of the partition wall 513 can form the lower side of the trapezoid, and the top (i.e., the front side) of the partition wall 513 can form the upper side of the trapezoid. The angle between the lead frame 510 and the side of the partition wall 513 can be 90 degrees or an obtuse angle. Based on the lead frame 510, the heights of the light sources 511a and 511b can be less than the height of the partition wall 513 and the height of the wall 512. Based on the lead frame 510, the height of the partition wall 513 can be equal to or greater than the height of the wall 512.

[0160] For example, with the partition wall 513 as a reference, the first light source 511a and the first chamber 51Ca can be symmetrical with the second light source 511b and the second chamber 51Cb.

[0161] Reference Figure 16 and Figure 18 An optical package 51 may include two light sources 511a and 511b, and a partition wall 513 may be located between the two light sources 511a and 511b. The brightness of each light source can be controlled individually, thereby forming a local dimming block.

[0162] The light from the specific light package 51 can be provided to a specific area A10 of the display panel 10. The specific area A10 can be circular. The light from the first light source 511a can be provided to a first area A11 of the specific area A10, and the light from the second light source 511b can be provided to a second area A12 of the specific area A10.

[0163] For example, in order to provide light to the first part A2a of the bright moon A2, the first light source 511a of the light package 51 corresponding to the first part A2a can be driven, while the second light source 511b can be left undriven.

[0164] For example, in order to provide light to the second part A2b of the bright moon A2, the second light source 511b of the light package 51 corresponding to the second part A2b can be driven, while the first light source 511a can be left undriven.

[0165] For example, in order to provide light to the third part A2z of the bright moon A2, the first light source 511a and the second light source 511b of the light package 51 corresponding to the third part A2z can both be driven.

[0166] Reference Figure 22 and Figure 23 An optical package 51 may include four light sources 511a, 511b, 511c, and 511d, and each light source may form a local dimming block. The optical package 51 may be a square or rectangular component.

[0167] Specifically, the plurality of lead frames 510 of the optical package 51 can be electrically connected to the substrate. The first to the eighth lead frames 510a, 510b, 510c, 510d, 510e, 510f, 510g, 510h can be arranged in a 4×2 matrix, and can be adjacent to each other and spaced apart from each other.

[0168] A plurality of spacers 510Sa, 510Sc and a plurality of partition walls 513a, 513b may be located between the first lead frame and the eighth lead frame 510a, 510b, 510c, 510d, 510e, 510f, 510g, 510h. Walls 512 may extend along the periphery of the plurality of lead frames 510.

[0169] The first light source 511a can be mounted on the first lead frame 510a and the second lead frame 510b, and can be covered by the first package 514a.

[0170] The second light source 511b can be mounted on the third lead frame 510c and the fourth lead frame 510d, and can be covered by the second package 514b.

[0171] The third light source 511c can be mounted on the fifth lead frame 510e and the sixth lead frame 510f, and can be covered by the third package 514c.

[0172] The fourth light source 511d can be mounted on the seventh lead frame 510g and the eighth lead frame 510h, and can be covered by the fourth package 514d.

[0173] For example, light source 511 can be a cuboid-shaped chip. For example, the long side of the first light source 511a and the long side of the second light source 511b can face each other. For example, the long sides of the third light source 511c and the fourth light source 511d face each other.

[0174] The partition wall 513 can be located between the first light source and the fourth light source 511a, 511b, 511c, 511d. The longitudinal partition wall 513a can be located between the first light source 511a and the second light source 511b. Additionally, the longitudinal partition wall 513a can be located between the third light source 511c and the fourth light source 511d. The transverse partition wall 513b can be located between the first light source 511a and the third light source 511c. Additionally, the transverse partition wall 513b can be located between the second light source 511b and the fourth light source 511d.

[0175] The brightness of each of the first to fourth light sources 511a, 511b, 511c, and 511d can be individually controlled, thereby allowing each light source to form a local dimming block. As described above, the number of local dimming blocks formed by one optical package 51 can be the same as the number of light sources in the optical package 51. The number of light sources can be two or more. Similar to two light sources 511a and 511b, three or more light sources can be directed towards the rear recess 533 of the lens 53 (see reference). Figure 20 The optical package 51 can be a 1 die – N LED chips package, where N is a natural number greater than 2.

[0176] The light from the specific light package 51 can be provided to a specific area A20 of the display panel 10. The specific area A20 can be circular. The light from the first light source 511a can be provided to the first area A21 of the specific area A20, and the light from the second light source 511b can be provided to the second area A22 of the specific area A20. The light from the third light source 511c can be provided to the third area A23 of the specific area A20. The light from the fourth light source 511d can be provided to the fourth area A24 of the specific area A20.

[0177] For example, in order to provide light to the first part A2a of the bright moon A2, the third light source 511c of the light package 51 corresponding to the first part A2a can be driven, while the other plurality of light sources 511a, 511b, 511d can be left undriven.

[0178] For example, in order to provide light to the second part A2b of the bright moon A2, the fourth light source 511d of the light package 51 corresponding to the second part A2b can be driven, while the other plurality of light sources 511a, 511b, and 511c can be left undriven.

[0179] For example, in order to provide light to the third part A2c of the bright moon A2, the second light source 511b of the light package 51 corresponding to the third part A2c can be driven, while the other plurality of light sources 511a, 511c, 511d can be left undriven.

[0180] For example, in order to provide light to the fourth part A2d of the bright moon A2, the first light source 511a of the light package 51 corresponding to the fourth part A2d can be driven, while the remaining plurality of light sources 511b, 511c, 511d can be left undriven.

[0181] For example, in order to provide light to the fifth part A2e of the bright moon A2, the third light source 511c and the fourth light source 511d of the light package 51 corresponding to the fifth part A2e can be driven, while the remaining plurality of light sources 511a and 511b can be left undriven.

[0182] For example, in order to provide light to the sixth part A2f of the bright moon A2, the second light source 511b and the fourth light source 511d of the light package 51 corresponding to the sixth part A2f can be driven, while the remaining plurality of light sources 511a and 511c can be left undriven.

[0183] For example, in order to provide light to the seventh part A2g of the bright moon A2, the first light source 511a and the second light source 511b of the light package 51 corresponding to the seventh part A2g can be driven, while the remaining plurality of light sources 511c and 511d can be left undriven.

[0184] For example, in order to provide light to the eighth part A2h of the bright moon A2, the first light source 511a and the third light source 511c of the light package 51 corresponding to the eighth part A2h can be driven, while the remaining plurality of light sources 511b and 511d can be left undriven.

[0185] For example, in order to provide light to the ninth part A2i of the bright moon A2, the first to fourth light sources 511a, 511b, 511c, and 511d of the light package 51 corresponding to the ninth part A2i can all be driven.

[0186] Therefore, the more local dimming blocks formed by an optical package 51, the less light diffusion occurs around the bright moon A2, i.e., the halo effect. In other words, the more light sources 511 an optical package 51 has, the better the image quality.

[0187] Reference Figure 24 An optical package 51 may include three light sources 511a, 511b, and 511c. The three light sources 511a, 511b, and 511c may be arranged in a row. A first partition wall 5131 may be located between the first light source 511a and the second light source 511b, and a second partition wall 5132 may be located between the second light source 511b and the third light source 511c. The first partition wall 5131 can block the light from the first light source 511a from traveling to the area in front of the second light source 511b, and can also block the light from the second light source 511b from traveling to the area in front of the first light source 511a. The second partition wall 5132 can block the light from the second light source 511b from traveling to the area in front of the third light source 511c, and can also block the light from the third light source 511c from traveling to the area in front of the second light source 511b. Each of the first to third light sources 511a, 511b, and 511c can be controlled independently. Thus, an optical package 51 can provide a first local dimming block formed by a first light source 511a, a second local dimming block formed by a second light source 511b, and a third local dimming block formed by a third light source 511c.

[0188] Reference Figures 25 to 28An optical package 51' may include a plurality of light sources 511' of different sizes. The plurality of light sources 511' may be a plurality of LED chips 511' (Light Emitting Diode Chips). The optical package 51' may be referred to as an LED package 51' or an optical assembly 51'. The plurality of light sources 511' may be adjacent to each other and spaced apart. A light source 511' may be a cuboid-shaped chip, and all five faces of the light source 511', excluding the bottom face, may emit light. The size of a second light source 511b' may be larger than the size of a first light source 511a'. The ratio of the size of the second light source 511b' to the size of the first light source 511a' may be 2:1. The width Wb' of the second light source 511b' may be larger than the width Wa' of the first light source 511a'. The height Hb' of the second light source 511b' may be larger than the height Ha' of the first light source 511a'. The thickness of the second light source 511b' may be greater than the thickness of the first light source 511a'.

[0189] Therefore, under a specific current, the light intensity (brightness) of the second light source 511b' can be greater than that of the first light source 511a'. The first light source 511a' and the second light source 511b' can each be controlled independently.

[0190] Reference Figure 25 and Figure 28 The second light source 511b' can be driven, while the first light source 511a' can be left undriven. The greater the current flowing through the second light source 511b', the greater its brightness can be.

[0191] Reference Figure 26 and Figure 28 The first light source 511a' can be driven, while the second light source 511b' can be de-driven. The greater the current flowing through the first light source 511a', the greater its brightness. The slope of the brightness of the first light source 511a' can be less than the slope of the brightness of the second light source 511b'.

[0192] Reference Figure 27 and Figure 28 Both the first light source 511a' and the second light source 511b' can be driven. The greater the current flowing through the first light source 511a' and the second light source 511b', the greater the brightness of the first light source 511a' and the second light source 511b' can be.

[0193] Reference Figures 29 to 31 The brightness of the optical package 51' can be changed by the amount of current applied to the optical package 51'.

[0194] Reference Figure 29The current applied to the optical package 51' can be less than or greater than the reference current Ia. If a current less than the reference current Ia is applied to the optical package 51', the current can flow only to the second light source 511b', driving the second light source 511b'. If a current greater than the reference current Ia is applied to the optical package 51', the current can flow to both the first light source 511a' and the second light source 511b', driving both light sources 511a' and 511b'. That is, the brightness slope of the optical package 51' can be changed based on the reference current Ia. This can be referred to as high grayscale enhancement control.

[0195] Reference Figure 30 The current applied to the optical package 51' can be less than the first reference current Iba, or greater than the first reference current Iba and less than the second reference current Ibb, or greater than the second reference current Ibb. If a current less than the first reference current Iba is applied to the optical package 51', the current can flow only to the second light source 511b', driving the second light source 511b'. If a current greater than the first reference current Iba and less than the second reference current Ibb is applied to the optical package 51', the current can flow to both the first light source 511a' and the second light source 511b', driving both light sources 511a' and 511b'. If a current greater than the second reference current Ibb is applied to the optical package 51', the current can flow only to the second light source 511b', driving the second light source 511b'. That is, the brightness slope of the optical package 51' can be changed based on the first reference current Iba and the second reference current Ibb. This can be referred to as mid-grayscale enhancement control.

[0196] Reference Figure 31 The current applied to the optical package 51' can be less than the first reference current Ica, or greater than the first reference current Ica and less than the second reference current Icb, or greater than the second reference current Icb. If a current less than the first reference current Ica is applied to the optical package 51', the current can flow only to the first light source 511a', driving the first light source 511a'. If a current greater than the first reference current Ica and less than the second reference current Icb is applied to the optical package 51', the current can flow only to the second light source 511b', driving the second light source 511b'. If a current greater than the second reference current Icb is applied to the optical package 51', the current can flow to both the first light source 511a' and the second light source 511b', driving both the first light source 511a' and the second light source 511b'. That is, the brightness slope of the optical package 51' can be changed based on the first reference current Ica and the second reference current Icb. This can be referred to as low grayscale and high grayscale enhancement type control.

[0197] Will Figure 32 andFigures 25 to 28 Together, an optical package 51' can include two light sources 511a' and 511b' of different sizes, which can form a local dimming block.

[0198] For example, in order to provide light to the first part A2u of the bright moon A2, the first light source 511a' corresponding to the first part A2u of the light package 51' can be driven, while the second light source 511b' can be left undriven.

[0199] For example, in order to provide light to the second part A2v of the bright moon A2, the second light source 511b' of the light package 51' corresponding to the second part A2v can be driven, while the first light source 511a' can be left undriven.

[0200] For example, in order to provide light to the third part A2w of the bright moon A2, the first light source 511a' and the second light source 511b' corresponding to the third part A2w of the light package 51' can both be driven.

[0201] This allows for more diverse control over the brightness of each local dimming block.

[0202] Reference Figure 33 and Figure 34 The light package 51' may include a partition wall 513' disposed between a plurality of light sources 511'. The elongated partition wall 513' may protrude further forward from the substrate 40' than the plurality of light sources 511'. The light distribution of each of the plurality of light sources 511' may be separated by the partition wall 513'.

[0203] Reference Figure 33 The partition wall 513' can be located between the first light source 511a' and the second light source 511b'. The partition wall 513' can block the light from the first light source 511a' from traveling to the area in front of the second light source 511b', and can also block the light from the second light source 511b' from traveling to the area in front of the first light source 511a'. The first light source 511a' and the second light source 511b' can each be controlled independently. Thus, an optical package 51' can provide a first local dimming block formed by the first light source 511a' and a second local dimming block formed by the second light source 511b'.

[0204] Reference Figure 34The first partition wall 5131' can be located between the first light source 511a' and the second light source 511b', and the second partition wall 5132' can be located between the second light source 511b' and the third light source 511c'. For example, the first light source 511a' and the third light source 511c' can have the same size, and the size of the second light source 511b' can be larger than the size of the first light source 511a'. Alternatively, the first light source 511a' and the third light source 511c' can have the same size, and the size of the second light source 511b' can be smaller than the size of the first light source 511a'. The first partition wall 5131' can block the light from the first light source 511a' from traveling towards the area in front of the second light source 511b', and can also block the light from the second light source 511b' from traveling towards the area in front of the first light source 511a'. The second partition wall 5132' can block the light from the second light source 511b' from traveling to the area in front of the third light source 511c', and can also block the light from the third light source 511c' from traveling to the area in front of the second light source 511b'. The first to third light sources 511a', 511b', and 511c' can be controlled individually. Thus, an optical package 51' can provide a first local dimming block formed by the first light source 511a', a second local dimming block formed by the second light source 511b', and a third local dimming block formed by the third light source 511c'.

[0205] Thus, one optical package 51' can provide a plurality of local dimming blocks. In this case, the brightness slope of one local dimming block can be different from the brightness slope of another local dimming block.

[0206] Reference Figure 35 A plurality of optical packages 51 may be arranged along a substrate 40. The substrate 40 may have a longitudinally elongated bar shape. Alternatively, the substrate 40 may also have a transversely elongated bar shape. Alternatively, the substrate 40 may also have a plate shape, and the plurality of optical packages 51 may be arranged in either a transverse or longitudinal direction. The direction (e.g., horizontal direction) of the plurality of light sources 511a, 511b of the optical packages 51 may intersect with the direction (e.g., vertical direction) of the plurality of optical packages 51. Each of the plurality of lenses 53 may cover each of the plurality of optical packages 51a, 51b, 51c, 51d, 51e.

[0207] Reference Figure 36 One lens 53' can replace a plurality of lenses 53 to cover a plurality of optical packages 51a, 51b, 51c, 51d, and 51e. Lens 53' can be coupled to or attached to substrate 40. The longitudinal section of lens 53' can be the same as the longitudinal section VV' of lens 53 (refer to...). Figure 20The same applies. However, lens 53 is generally hemispherical, while lens 53' can extend elongated along the direction in which the plurality of optical packages 51a, 51b, 51c, 51d, and 51e are arranged. Lens 53' may include a dome part 531', a rear groove 533', and a front groove 534'. The rear groove 533' and the front groove 534' may be formed in the central part of lens 53'. The portion formed by the rear groove 533' and the front groove 534' in lens 53' can be referred to as the intermediate part 532'.

[0208] The dome portion 531' may have a protruding roof shape. The dome portion 531' may be referred to as the roof portion 531' or the arched part 531'. The front side 531F' of the dome portion 531' may be curved, and the back side 531R' of the dome portion 531' may be flat.

[0209] The rear recess 533' can be recessed from the back side 531R' of the dome portion 531'. The rear recess 533' can be a tunnel-shaped recess.

[0210] The front recess 534' can be recessed from the front side 531F' of the dome portion 531'. The front recess 534' can be a channel-shaped recess.

[0211] The first part 53a' of lens 53' may be the portion of lens 53' located between the center of lens 53' and the first long side LS1' of lens 53', and may correspond to the first light source 511a'. The second part 53b' of lens 53' may be the portion of lens 53' located between the center of lens 53' and the second long side LS2' of lens 53', and may correspond to the second light source 511b'.

[0212] A plurality of optical packages 51 may be located in the rear recess 533'. The optical packages 51 may be spaced apart from the bottom 5331" of the rear recess 533'. The distance between the light source 511 of the optical package 51 and the bottom 5331" of the rear recess 533' may be approximately 1 mm. The bottom 5331" of the rear recess 533' facing the plurality of light sources 511a, 511b of the plurality of optical packages 51 may be a curved surface convex towards the plurality of light sources 511a, 511b. Alternatively, the bottom 5331" may also be a flat surface.

[0213] A portion of the light from a plurality of first light sources 511a and a portion of the light from a plurality of second light sources 511b of a plurality of optical packages 51 can pass through the bottom 5341” of the front recess 534’. The bottom 5341” of the front recess 534’ facing the plurality of light sources 511a, 511b of the plurality of optical packages 51 can be a plane. Alternatively, the bottom 5341” can also be a recessed curved surface.

[0214] Therefore, lens 53' helps to minimize the area of ​​overlap between the local dimming block formed by the first light source 511a and the local dimming block formed by the second light source 511b of each optical package 51.

[0215] Reference Figure 37 and Figure 38 The controller C can be electrically connected to a plurality of substrates 40. The controller C can be mounted on an expansion board 59 incorporating the plurality of substrates 40 (see reference). Figure 7 The controller C can receive image quality (e.g., brightness) data about the plurality of optical packages 51 on each substrate 40 from the motherboard P3, and can control the brightness of the plurality of optical packages 51. The controller C can convert (process) the data received from the motherboard P3 and provide it to the driver IC(U) of each substrate 40 (see reference). Figure 7 The driver IC(U) can adjust the brightness of a plurality of optical packages 51. The controller C can be electrically connected to a memory that stores programs (computer program code), data, etc., used to control the brightness of the plurality of optical packages 51. The memory can be integrated with the controller C and can be classified as a subordinate component of the controller C. Alternatively, the memory can be located outside the controller C and can be classified as a separate component from the controller C. The memory can be a non-volatile memory.

[0216] Therefore, the controller C can control the brightness of each of the plurality of light sources 511a and 511b in each plurality of light packages 51 of each substrate 40. The plurality of light packages 51 of each substrate 40 can be referred to as light array 51 or LED array 51.

[0217] In the first mode (state) of each optical package 51, the controller C can turn on both the first light source 511a and the second light source 511b to control the brightness (i.e., control dimming).

[0218] In the second mode (state) of each optical package 51, the controller C can turn on the first light source 511a to control the brightness (i.e., control dimming), and the second light source 511b can be turned off.

[0219] In the third mode (state) of each optical package 51, the controller C can turn on the second light source 511b to control the brightness (i.e., control dimming), and the first light source 511a can be turned off.

[0220] Reference Figures 1 to 38 The display device 1 may include: a display panel 10; and a backlight unit that provides light to the display panel 10; the backlight unit may include: a substrate 40; a plurality of light packages 51 located on the substrate 40; and a lens 53 covering the light packages 51; the light package 51 may include: a first light source 511a on the substrate 40; a second light source 511b adjacent to the first light source 511a; and a partition wall 513 between the first light source 511a and the second light source 511b.

[0221] The brightness of the first light source 511a and the brightness of the second light source 511b can be controlled independently. The first light source 511a can form a first local dimming block, and the second light source 511b can form a second local dimming block.

[0222] In the first mode of the optical encapsulation 51, both the first light source 511a and the second light source 511b can be turned on to control the brightness. In the second mode of the optical encapsulation, the first light source 511a can be turned on to control the brightness, while the second light source 511b can be turned off. In the third mode of the optical encapsulation, the first light source 511a can be turned off, while the second light source 511b can be turned on to control the brightness.

[0223] The optical encapsulation 51 may further include: a wall 512 surrounding the first light source 511a and the second light source 511b, having a first portion 512a and a second portion 512b located opposite each other relative to the partition wall 513; a first cavity 51Ca located between the first portion 512a and the partition wall 513; and a second cavity 51Cb located between the partition wall 513 and the second portion 512b.

[0224] The first light source 511a may be located in the first chamber 51Ca and may be configured to be closer to the partition wall 513 than the first portion 512a. The second light source 511b may be located in the second chamber 51Cb and may be configured to be closer to the partition wall 513 than the second portion 512b.

[0225] The first chamber 51Ca may include: a first sub-region 51Caa, located between the first portion 512a and the central axis Za of the first chamber 51Ca; and a second sub-region 51Cab, located between the central axis Za of the first chamber 51Ca and the partition wall 513; the second chamber 51Cb may include: a third sub-region 51Cba, located between the partition wall 513 and the central axis Zb of the second chamber 51Cb; and a fourth sub-region 51Cbb, located between the central axis Zb of the second chamber 51Cb and the second portion 512b; the first light source 511a may be located in the second sub-region 51Cab, and the second light source 511b may be located in the third sub-region 51Cba.

[0226] The height at which the partition wall 513 protrudes from the substrate 40 can be greater than the height at which the first light source 511a and the second light source 511b protrude from the substrate 40; the first light source 511a and the second light source 511b can be adjacent to the partition wall 513.

[0227] The space in front of the light package 51 may include: a first space Va in front of the first light source 511a; and a second space Vb in front of the second light source 511b; the central axis Z3 of the partition wall 513 may be located between the first space Va and the second space Vb; a portion of the light from the first light source 511a may pass through the second space Vb.

[0228] The backlight unit may further include a diffuser plate 31 between the display panel 10 and the lens 53; the diffuser plate 31 may include: a first backlight coverage area Vaa, corresponding to the first space Va, wherein a portion of the light from the first light source 511a reaches the first backlight coverage area Vaa; and a second backlight coverage area Vab, corresponding to the second space Vb, wherein a portion of the light from the first light source 511a reaches the second backlight coverage area Vab; the ratio of the second backlight coverage area Vab to the sum of the first backlight coverage area Vaa and the second backlight coverage area Vab may be less than 0.3.

[0229] The optical encapsulation 51 may further include: a wall 512 surrounding the first light source 511a and the second light source 511b; a first cavity 51Ca formed between a first portion 512a of the wall 512 and the partition wall 513, wherein the first light source 511a is located in the first cavity; a second cavity 51Cb formed between a second portion 512b of the wall 512 and the partition wall 513, wherein the second light source 511b is located in the second cavity 51Cb; a first package 514a filling the first cavity 51Ca and covering the first light source 511a; and a second package 514b filling the second cavity 51Cb and covering the second light source 511b.

[0230] The optical package 51 may further include a lead frame 510, which is electrically connected to the substrate 40, and the first light source 511a and the second light source 511b are located in the lead frame.

[0231] The optical package 51 may also include at least one light source 511c in addition to the first light source 511a and the second light source 511b. The brightness of the first light source 511a, the brightness of the second light source 511b and the brightness of the at least one light source 511c can be controlled independently. The lens 53 can cover the first light source 511a, the second light source 511b and the at least one light source 511c.

[0232] Under a specific current, the brightness of the second light source 511b' can be greater than the brightness of the first light source 511a'.

[0233] The second light source 511b' can be larger than the first light source 511a', and the brightness of the second light source 511b' and the brightness of the first light source 511a' can be controlled independently of each other.

[0234] The lens 53 may include: a protruding dome portion 531; a rear groove 533 recessed from the back side 531R of the dome portion 531, facing the optical package 51; and a front groove 534 recessed from the front side 531F of the dome portion 531, located on the opposite side of the rear groove 533; the central axis Z3 of the partition wall 513 may extend in a direction intersecting the rear groove 533 and the front groove 534.

[0235] The bottom 5331, 5331' of the rear groove 533 can be a curved surface 5331 or a flat surface 5331' protruding toward the first light source and the second light source of the optical package.

[0236] The bottom 5341, 5341' of the front groove 534 can be a flat surface 5341 or a curved surface 5341' recessed towards the inside of the lens 53.

[0237] The lens 53' can extend along the direction in which the plurality of optical packages 51 are arranged, and can cover the plurality of optical packages 51.

[0238] The display device 1 may further include a controller C for controlling the brightness of the first light source 511a and the brightness of the second light source 511b.

[0239] The foregoing embodiments of the present invention, or other embodiments thereof, are not mutually exclusive or distinct. The respective configurations or functions of the foregoing embodiments of the present invention, or other embodiments thereof, may be used in combination or interchangeably.

[0240] For example, this means that configuration A as illustrated in a specific embodiment and / or the drawings can be combined with configuration B as illustrated in other embodiments and / or the drawings. That is, it means that even if the combination between the configurations is not directly described, they can be combined except where it is stated that they cannot be combined.

[0241] The detailed description above should not be construed as limiting in all respects, but rather as exemplary. The scope of the invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

Claims

1. A display device, wherein, include: Display panel; as well as The backlight unit provides light to the display panel; The backlight unit includes: substrate; A plurality of optical packages are located on the substrate; and Lens, covering the optical package; The optical package includes: The first light source on the substrate; A second light source adjacent to the first light source; and The partition wall between the first light source and the second light source; In the first mode of the optical encapsulation, both the first light source and the second light source are turned on to control the brightness; In the second mode of the optical encapsulation, the first light source is turned on to control the brightness, and the second light source is turned off; In the third mode of the optical encapsulation, the first light source is turned off, and the second light source is turned on to control the brightness.

2. The display device according to claim 1, wherein, The optical package further includes: A wall that surrounds the first light source and the second light source has a first portion and a second portion that are located on opposite sides of each other relative to the partition wall; A first chamber, located between the first portion and the partition wall; and The second chamber is located between the partition wall and the second part; The first chamber includes: A first sub-region, located between the central axis of the first portion and the first chamber; and The second sub-region is located between the central axis of the first chamber and the partition wall; The second chamber includes: The third sub-region is located between the central axis of the partition wall and the second chamber; and The fourth sub-region is located between the central axis of the second chamber and the second portion; The first light source is located in the second sub-region; The second light source is located in the third sub-region.

3. The display device according to claim 1, wherein, The height by which the partition wall protrudes from the substrate is greater than the height by which the first light source and the second light source protrude from the substrate; The first light source and the second light source are adjacent to the partition wall.

4. The display device according to claim 3, wherein, The space in front of the optical package includes: The first space in front of the first light source; and The second space in front of the second light source; The central axis of the partition wall is located between the first space and the second space; A portion of the light from the first light source passes through the second space.

5. The display device according to claim 4, wherein, The backlight unit also includes a diffuser plate between the display panel and the lens; The diffusion plate includes: A first backlight coverage area corresponds to the first space, and a portion of the light from the first light source reaches the first backlight coverage area; and The second backlight coverage area corresponds to the second space, and a portion of the light from the first light source reaches the second backlight coverage area; The ratio of the second backlight coverage area to the entire backlight coverage area including the first backlight coverage area and the second backlight coverage area is less than 0.

3.

6. The display device according to claim 1, wherein, The optical package further includes: A wall surrounds the first light source and the second light source; A first chamber is formed between a first portion of the wall and the partition wall, and the first light source is located in the first chamber; A second chamber is formed between a second portion of the wall and the partition wall, and the second light source is located in the second chamber; A first package, filling the first cavity and covering the first light source; and The second package is filled into the second chamber and covers the second light source.

7. The display device according to claim 6, wherein, The optical package further includes a lead frame electrically connected to the substrate, wherein the first light source and the second light source are located on the lead frame.

8. The display device according to claim 1, wherein, The optical package also includes at least one light source other than the first light source and the second light source; The brightness of the first light source, the brightness of the second light source, and the brightness of the at least one light source are controlled independently of each other; The lens covers the first light source, the second light source, and the at least one light source.

9. The display device according to claim 1, wherein, Under a specific current, the brightness of the second light source is greater than that of the first light source.

10. The display device according to claim 9, wherein, The second light source is larger than the first light source; The brightness of the second light source and the brightness of the first light source are controlled independently of each other.

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