Wide-range diffusion lens and wide-range light emission drive package

Abstract

This invention provides a wide-angle diffusion lens and wide-angle light-emitting drive package that can be configured with a multi-focus package in which a large number of micro-LEDs are arranged around a driving element, thereby preventing dark areas, improving light uniformity, achieving high light intensity and a wide beam angle, and reducing the number of components to lower the unit cost of the product and greatly improve productivity. [Solution] The wide-area diffusion lens includes an incident surface into which light generated by a light-emitting element is incident, and an exit surface that refracts or reflects the light incident from the incident surface and then emits it to a widely diffused area, wherein the exit surface comprises a central column formed in an overall cylindrical shape, and at least one frame dome portion formed integrally with the central column and surrounding the central column, with at least one portion of which is dome-shaped or hemispherical.

Description

Technical Field

[0001] The present invention relates to a wide-range diffusion lens and a wide-range light emission driving package, and more particularly, to a wide-range diffusion lens and a wide-range light emission driving package having a wide light irradiation area.

Background Art

[0002] Generally, a conventional light-emitting element package is formed by mounting one light-emitting element (LED) on a substrate and molding it with a molding member. When such a single-focus light-emitting element package is used in a backlight unit, the light irradiation area is narrow. To solve this problem, a separate optical lens capable of refracting or diffusing light is attached on the optical path.

[0003] Such an optical lens is also formed in a very simple convex lens shape and often cannot reflect the characteristics of the light-emitting element. As a result, the conversion efficiency is low, and there are many problems such as light being transmitted only to a narrow area.

[0004] Particularly, in the case of a multi-focus light-emitting element package in which a plurality of light-emitting elements are formed, such an optical lens has many problems such as partial dark portions occurring, the overall light amount becoming non-uniform, or the light emission efficiency decreasing.

[0005] In addition, when a plurality of lenses are applied to a multi-focus light-emitting element package, the number of components and the production process increase, and of course, the unit price and productivity of the product are greatly reduced. On the other hand, light loss due to diffusion and refraction occurs at the interface of the optical lens, and the light efficiency is very low. When constituting a backlight, the focal length becomes long, the required optical distance (OD, Optical Distance) increases, the backlight unit becomes thick, or when constituting a backlight unit of the same area, the number of required light-emitting element packages greatly increases, and it becomes difficult to achieve optical uniformity (Display Uniformity). There are many such problems.

[0006] Furthermore, in conventional backlight units using such light-emitting element packages, in addition to the light-emitting element packages, separate driving elements such as driver ICs that drive these light-emitting element packages are mounted on the printed circuit board. As a result, the wiring layers of the printed circuit board become very complex, and because the wiring layers must be constructed in multiple layers, the complexity of the circuit on the printed circuit board increases, which not only increases the manufacturing cost of the printed circuit board but also increases the number of components such as driving elements, which greatly increases the unit price of the product and the costs of manufacturing processes such as bonding. Moreover, when assembling the optical lens as described above, there are many problems such as the twisting phenomenon of the directionality angle due to positional deviation.

[0007] On the other hand, conventional backlight units using light-emitting element packages mount the light-emitting element and the driving element on a single printed circuit board that is on the same plane. This results in larger packages and circuit configurations, or larger surface areas, which leads to increased material costs. [Overview of the initiative] [Problems that the invention aims to solve]

[0008] The present invention aims to solve many problems, including those described above, by providing a wide-range diffusion lens and wide-range light-emitting drive package that can be configured in a multi-focus package with a large number of micro-LEDs arranged around a driving element, thereby preventing dark areas, improving light uniformity, achieving high light intensity and a wide beam angle, reducing the unit cost of the product by reducing the number of components, and greatly improving productivity. However, these problems are illustrative and do not limit the scope of the present invention. [Means for solving the problem]

[0009] A wide-area diffusion lens according to the concept of the present invention for solving the aforementioned problems includes an incident surface into which light generated by a light-emitting element is incident, and an exit surface that refracts or reflects the light incident from the incident surface and then emits it to a widely diffused area, wherein the exit surface may include a central column formed in an overall cylindrical shape, and at least one frame dome formed around the central column, at least a portion of which is dome-shaped or hemispherical.

[0010] Furthermore, according to the present invention, the central column portion may have an outer diameter surface formed on its side surface and a central recessed groove portion formed on its upper surface.

[0011] Furthermore, according to the present invention, the central recessed groove portion may include a central base portion formed in a concave shape toward the central axis, and a central convex inclined surface portion formed in an overall funnel shape toward the central base portion, with a cross-section formed in a convex shape toward the upper side.

[0012] Furthermore, according to the present invention, the frame dome portion may have a spherical surface formed on at least a portion of its side surface, and a frame groove portion may be formed in a concave shape on the outer diameter surface of the central column portion or on the upper surface near the outer diameter surface.

[0013] Furthermore, according to the present invention, the frame groove portion may include a frame bottom point portion formed on the upper surface, and a frame convex inclined surface portion that is formed to be inclined in a funnel shape overall toward the frame bottom point portion and whose cross-section is convex upward.

[0014] Furthermore, according to the present invention, the incident surface may include a bottom portion formed in an overall flat shape, and an incident groove portion formed in a concave shape in the bottom portion corresponding to the light-emitting element, and formed in an overall dome shape toward the apex.

[0015] Furthermore, according to the present invention, four frame dome sections can be formed around one central column section so that light can be dispersed into an overall rectangular area corresponding to the four light-emitting elements.

[0016] Furthermore, according to the present invention, two frame dome sections can be formed around one central column section so that light can be dispersed into a linear region overall, corresponding to the two light-emitting elements.

[0017] Furthermore, according to the present invention, three frame dome sections can be formed around one central column section so that light can be dispersed into an overall triangular region corresponding to the three light-emitting elements.

[0018] On the other hand, a wide-area light-emitting drive package according to the concept of the present invention for solving the above problems includes a substrate, a terminal layer formed on one surface of the substrate, a wiring layer formed on the other surface of the substrate and electrically connected to the terminal layer using through electrodes, at least one light-emitting element mounted on a portion of the wiring layer and positioned at the outer edge of the substrate, a drive element mounted on the other portion of the wiring layer and positioned at the center of the substrate for driving the light-emitting element, and a wide-area diffusion lens for diffusing the light generated by the light-emitting element, wherein the wide-area diffusion lens includes an incident surface into which the light generated by the light-emitting element is incident, and an exit surface that refracts or reflects the light incident from the incident surface and then emits it to a widely diffused area, wherein the exit surface may include a central column formed in an overall cylindrical shape, and at least one frame dome formed around the central column, at least a portion of which is dome-shaped or hemispherical.

[0019] Furthermore, according to the present invention, multiple light-emitting elements may be arranged symmetrically in a diagonal or cross shape around the driving element to achieve wide coverage of the optical path.

[0020] Furthermore, according to the present invention, the light-emitting element may be arranged in the front left, front right, rear left, and rear right directions, respectively, with the driving element as the center, or it may be two or more LEDs arranged in the front, rear, left, and right directions, respectively.

[0021] According to the present invention, the light-emitting element can include at least one or more of a red LED, a green LED, a blue LED, a white LED, and combinations thereof.

[0022] According to the present invention, the light-emitting element is a micro-LED or a mini-LED, and the driving element can be a driver IC having one or more channels for driving the micro-LED.

Advantages of the Invention

[0023] According to an embodiment of the present invention configured as described above, a multi-focus package in which a large number of micro-LEDs are arranged around a driving element can be formed, thereby preventing dark portions, improving light uniformity, achieving a high light amount and a wide directivity angle, reducing the unit price and manufacturing cost of the product by reducing the number of components, greatly improving productivity, minimizing the circuit complexity of the printed circuit board when applying the backlight unit, widening the light irradiation area, improving light efficiency, greatly reducing the required number of components, reducing the thickness of the product, and integrating each component since the molding member serves as a lens, thereby preventing component deviation and torsional phenomena of the directivity angle. Of course, the scope of the present invention is not limited by such effects.

Brief Description of the Drawings

[0024] [Figure 1] It is a perspective view showing a wide-angle diffusion lens according to some embodiments of the present invention. [Figure 2] It is a plan view of the wide-angle diffusion lens of FIG. 1. [Figure 3] It is a bottom view of the wide-angle diffusion lens of FIG. 1. [Figure 4] It is a cross-sectional view taken along line IV-IV of the wide-angle diffusion lens of FIG. 1. [Figure 5] It is a perspective view showing a wide-angle diffusion lens according to some other embodiments of the present invention. [Figure 6]It is a plan view of the wide-area diffusion lens of FIG. 5. [Figure 7] It is a perspective view showing a wide-area diffusion lens according to still another embodiment of the present invention. [Figure 8] It is a plan view of the wide-area diffusion lens of FIG. 7. [Figure 9] It is an exploded perspective view of parts showing a wide-area light-emitting drive package according to an embodiment of the present invention having the wide-area diffusion lens of FIG. 1. [Figure 10] It is a bottom view showing the wide-area light-emitting drive package of FIG. 9. [Figure 11] It is a plan view showing the wide-area light-emitting drive package of FIG. 9. [Figure 12] It is a cross-sectional view showing the wide-area light-emitting drive package of FIG. 9. [Figure 13] It is a plan view showing the light irradiation area of the wide-area light-emitting drive package of FIG. 9. [Figure 14] It is a plan view showing a backlight unit according to an embodiment of the present invention. [Figure 15] It is a plan view showing a display device according to an embodiment of the present invention. [Figure 16] It is an exploded perspective view of parts showing a wide-area light-emitting drive package according to another embodiment of the present invention. [Figure 17] It is a plan view showing the wide-area light-emitting drive package of FIG. 16. [Figure 18] It is a cross-sectional view showing the wide-area light-emitting drive package of FIG. 16.

Best Mode for Carrying Out the Invention

[0025] Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0026] Each embodiment of the present invention is provided to further and completely illustrate the invention to those who are ordinary skill in the art, and the embodiments described below can be modified in various other forms, and the scope of the invention is not limited to these embodiments. Rather, these embodiments are provided to further enrich and complete the disclosure and to fully convey the idea of ​​the invention to those skilled in the art. Also, in the drawings, the thickness and size of each layer are exaggerated for the sake of clarity and ease of explanation.

[0027] Throughout this specification, when it is stated that one component, such as a film, region, or substrate, is located “on” another component, “connected,” “stacked,” or “coupled” to another component, it may be interpreted that the one component is directly “on” another component, “connected,” “stacked,” or “coupled” to another component in contact with it, or that there may be other components interposed between them. On the other hand, when it is stated that one component is located “directly on” another component, “directly connected,” or “directly coupled” to another component, it is interpreted that there are no other components interposed between them. The same reference numerals refer to the same element. The term “and / or” as used herein includes any one of the listed items and all combinations of one or more of them.

[0028] In this specification, terms such as “first,” “second,” etc., are used to describe a variety of members, parts, regions, layers, and / or parts, but it is obvious that these members, parts, regions, layers, and / or parts should not be limited by these terms. These terms are used solely to distinguish one member, part, region, layer, or part from another region, layer, or part. Thus, the “first” member, part, region, layer, or part described in detail below may refer to the “second” member, part, region, layer, or part without departing from the teachings of the present invention.

[0029] Figure 1 is a perspective view showing a wide-area diffusion lens 70 according to some embodiments of the present invention, Figure 2 is a plan view of the wide-area diffusion lens 70 of Figure 1, Figure 3 is a bottom view of the wide-area diffusion lens 70 of Figure 1, and Figure 4 is a cross-sectional view of the wide-area diffusion lens 70 of Figure 1 taken along line IV-IV.

[0030] As shown in Figures 1 to 4, a wide-area diffusion lens 70 according to some embodiments of the present invention may include an incident surface 71 into which light generated by a light-emitting element 40 (see Figure 9) is incident, and an exit surface 72 that refracts or reflects the light incident from the incident surface 71 and then emits it to a widely diffused area.

[0031] Here, the incident surface 71 and the exit surface 72 can be, for example, the two side surfaces of a lens forming a single body. For example, various translucent materials such as transparent EMC, CMC (Clear Molding Compound Epoxy), silicon, epoxy, silicon oxide, glass, quartz, ceramic, and polycarbonate can all be used.

[0032] First, the incident surface 71 may include, for example, a bottom portion 71a formed in an overall flat shape, as shown in Figures 3 and 4, and an incident groove portion 71b formed in a concave shape in the bottom portion 71a to correspond to the light-emitting element 40, and formed in an overall dome shape toward the apex portion P.

[0033] Therefore, either at least a portion of the light-emitting element 40 (see Figure 12) is inserted into the entrance groove 71b, or the entrance groove 71b is positioned on the optical path of the light-emitting element 40, allowing light generated by the light-emitting element 40 to be incident on it.

[0034] Here, in some embodiments of the present invention, the wide-area diffusion lens 70 can be configured such that light can be dispersed into an overall rectangular area corresponding to the four light-emitting elements 40, with four frame dome portions 74 formed around a single central column portion 73. For example, as shown in Figure 3, a total of four entrance groove portions 71b can be formed in the bottom portion 71a.

[0035] The ejection surface 72 may include, for example, a single central column portion 73 formed in an overall cylindrical shape, as shown in Figures 1 to 4, and four frame dome portions 74 integral with the central column portion 73, with at least one formed around the central column portion 73 and at least one portion of each formed in a dome or hemispherical shape.

[0036] The central column portion 73 is formed in an overall cylindrical shape, for example, as shown in Figure 4, with an outer diameter surface 73a formed on the side surface and a central recessed groove portion 73b formed on the upper surface.

[0037] The central recessed groove portion 73b may include, for example, a central base portion 73b1 formed in a concave shape toward the central axis, as shown in Figure 4, and a central convex inclined surface portion 73b2 formed in an overall funnel shape toward the central base portion 73b1, with a cross-section that is convex upwards.

[0038] The frame dome portion 74 may have a spherical surface 74a formed on at least a portion of its side surface, as shown in Figure 4, and a frame groove portion 74b may be formed in a concave shape on the outer diameter surface 73a of the central column portion 73 or on the upper surface near the outer diameter surface 73a.

[0039] More specifically, the frame groove portion 74b may include a frame base point portion 74b1 formed on the upper surface and a frame convex inclined surface portion 74b2 that is formed to be generally funnel-shaped toward the frame base point portion 74b1 and whose cross-section is convex upward.

[0040] Therefore, as shown in Figures 1 to 4, the light diffusion process of the wide-area diffusion lens 70 according to some embodiments of the present invention can be described as follows: Light generated by the four light-emitting elements 40 is incident through the incident surface 71 and is refracted and reflected by the incident groove 71b. A portion of the light can be diffused over a wide area into the frame portion of the light-irradiated region via the frame dome portion 74 of the exit surface 72, while another portion of the light can be refracted or reflected by the frame recess groove 74b via the outer diameter surface 73a of the central column portion 73 and diffused over a wide area into the intermediate portion where a dark area may be formed.

[0041] Therefore, when configuring a multifocal package with a number of light-emitting elements 40, such as four, the four frame dome sections 74 can diffuse light over a wide area in the direction of each of the four corners, while the central column section 73 can eliminate the dark areas between each light-emitting element 40. As a result, high light intensity and a wide beam angle can be achieved while maintaining overall uniformity.

[0042] Figure 5 is a perspective view showing a wide-range diffusion lens 80 according to another embodiment of the present invention, and Figure 6 is a plan view of the wide-range diffusion lens 80 of Figure 5.

[0043] As shown in Figures 5 and 6, in some other embodiments of the present invention, a wide-range diffusion lens 80 may have two frame dome portions 74 formed around a single central column portion 73 so that light can be dispersed into an overall linear region corresponding to two light-emitting elements 40.

[0044] Therefore, as shown in Figures 5 and 6, the light diffusion process of the wide-area diffusion lens 80 according to some other embodiments of the present invention can be described as follows: Light generated by the two light-emitting elements 40 is incident through the incident surface 71, and a portion of the light can be diffused widely into the frame portion of the light-irradiated area via the frame dome portion 74 of the exit surface 72, while another portion of the light can be refracted or reflected by the central column portion 73 and diffused widely into the intermediate portion between the two light-emitting elements 40 where a dark area can be formed.

[0045] Therefore, when configuring a multifocal package with multiple light-emitting elements 40, such as two, the two frame dome sections 74 can diffuse light over a wide area in the direction of two corners, while the central column section 73 can eliminate the dark areas between each light-emitting element 40. As a result, high light intensity and a wide beam angle can be achieved while maintaining overall uniformity.

[0046] Figure 7 is a perspective view showing a wide-area diffusion lens 90 according to yet another embodiment of the present invention, and Figure 8 is a plan view of the wide-area diffusion lens 90 of Figure 7.

[0047] As shown in Figures 7 and 8, a wide-area diffusion lens 90 according to yet another embodiment of the present invention may have three frame dome portions 74 formed around a single central column portion 73 so that light can be dispersed into an overall triangular region corresponding to three light-emitting elements 40.

[0048] Therefore, as shown in Figures 7 and 8, the light diffusion process of the wide-area diffusion lens 90 according to yet another embodiment of the present invention is described as follows: Light generated by the three light-emitting elements 40 is incident through the incident surface 71, and a portion of the light can be diffused widely into the frame portion of the light-irradiated area via the frame dome portion 74 of the exit surface 72, while another portion of the light can be refracted or reflected by the central column portion 73 and diffused widely into the intermediate portion between the three light-emitting elements 40 where a dark area can be formed.

[0049] Therefore, when configuring a multifocal package with multiple light-emitting elements 40, such as three, the three frame dome sections 74 can diffuse light over a wide area in the three corner directions, while the central column section 73 can eliminate the dark areas between each light-emitting element 40. As a result, high light intensity and a wide beam angle can be achieved while maintaining overall uniformity.

[0050] Figure 9 is an exploded perspective view of the components of a wide-area light-emitting drive package 100 according to a partial embodiment of the present invention having the wide-area diffusion lens 70 of Figure 1; Figure 10 is a bottom view of the wide-area light-emitting drive package 100 of Figure 9; Figure 11 is a top view of the wide-area light-emitting drive package 100 of Figure 9; and Figure 12 is a cross-sectional view of the wide-area light-emitting drive package 100 of Figure 9.

[0051] As shown in Figures 9 to 12, the wide-range light-emitting drive package 100 according to some embodiments of the present invention can be broadly divided into a substrate 10, a terminal layer 20, a wiring layer 30, a light-emitting element 40, a drive element 50, and a wide-range diffusion lens 70.

[0052] The substrate 10 may be, for example, a plate-shaped structure having sufficient strength and durability to support the light-emitting element 40, the driving element 50, and the protective member 60, and is applicable to substrates and boards such as single-layer or multi-layer printed circuit boards, ceramic substrates, and metal substrates, and is made of an insulating material in at least a portion of its material.

[0053] However, such a substrate 10 is not necessarily limited to the drawing, and can be formed into a wide variety of three-dimensional shapes depending on the specifications, type, and shape of each package.

[0054] The terminal layer 20 may be, for example, a type of conductive layer formed on one surface of the substrate 10, i.e., the bottom surface.

[0055] To give a more specific example, the terminal layer 20 may be a conductive layer that includes pad portions 21 such as power terminal Vdd, power supply terminal Vss, digital input terminal Din, and digital output terminal Dout, which are formed in the outer corner portions of the lower surface of the substrate 10, as shown in Figure 2, and extension portions 22 that extend from the pad portions 21 and are extended so as to fade in to the central portion of the lower surface of the substrate 10.

[0056] However, the form and type of terminal layer 20 are not necessarily limited to those shown in the drawings, and a wide variety of other forms and types of terminal layers can all be applied.

[0057] The wiring layer 30 may be, for example, a conductive layer formed on the other side of the substrate 10, i.e., the upper surface, and electrically connected to the terminal layer 20 using through electrodes T.

[0058] To give a more specific example, the wiring layer 30 may include, as shown in Figure 11, a first wiring section 31 in which a portion is electrically connected to a pad-through electrode T1 formed on the power terminal Vss of the pad section 21 and the other portion is connected to the drive element 50; a second wiring section 32 in which a portion is electrically connected to extension-through electrodes T2 formed on the power terminal Vdd, digital input terminal Din, and digital output terminal Dout, respectively, formed on the extension section 22 and the other portion is connected to the drive element 50; and a third wiring section 33 in which a portion is connected to the drive element 50, the other portion is connected to a plurality of light-emitting elements 40, and the remaining portion is electrically connected to the pad-through electrode T1.

[0059] Here, the third wiring section 33 may be formed in a spiral shape with an overall angular or rounded form and a gradually widening range, so that it can be extended from the drive element 50 through all the light-emitting elements 40 to the pad-through electrode T1.

[0060] However, the form and type of such wiring layer 30 are not necessarily limited to those shown in the drawings, and a wide variety of other forms and types of terminal layers can also be applied.

[0061] In addition, although not shown in the figures, the wide-range light-emitting drive package 100 according to some embodiments of the present invention may further include an underfill member filled between the substrate 10 and the light-emitting element 40 or between the substrate 10 and the drive element 50, and a conductive adhesive member coated on the wiring layer 30.

[0062] The light-emitting element 40 is, for example, a light output element mounted on a portion of the wiring layer 30 and positioned on the outer edge of the substrate 10. More specifically, the light-emitting element 40 may include at least one of the following to form backlight illumination: a red LED, a green LED, a blue LED, a white LED, or a combination thereof; or it may be a micro-LED or mini-LED that can form a single display pixel with a red LED, a green LED, and a blue LED.

[0063] The light-emitting element 40 may be, for example, a flip-chip LED (Light Emitting Diode) with a first pad and a second pad formed on its lower surface. However, the light-emitting element 40 is not necessarily limited to a flip-chip form, and LEDs including non-flip inorganic light-emitting chips of various hues with pads formed on the upper surface may also be applied. As such a light-emitting element 40, all forms of LEDs, including general LEDs, mini-LEDs, and micro-LEDs, may be applied.

[0064] Other types of light-emitting elements that can be used include those with bonding wires applied to the terminals, or those with bonding wires applied only to the first or second terminal, as well as horizontal and vertical light-emitting elements. However, a flip-chip form factor may be preferable to achieve miniaturization and ultra-thinness of the product.

[0065] The driving element 50 may be, for example, a driver IC with one or more channels that is mounted on another part of the wiring layer 30, positioned at the center of the substrate 10, and drives the light-emitting element 40.

[0066] The driving element 50 may, in more specific examples, include at least one display driver integrated circuit (DDIC, Display Driving Integrated Circuit).

[0067] In other words, the driving element 50 may be, for example, a driving component such as a driver IC with one or more channels that is electrically connected to the light-emitting element 40 and drives the light-emitting element 40.

[0068] The driving element 50 includes a driving circuit inside, and the driving circuit can be a variety of types of circuits that supply power to the light-emitting element 40, control the driving voltage, process a feedback signal, control the driving brightness of the light-emitting element 40, or correct the light intensity of the light-emitting element 40 to match the reference light intensity of other light-emitting elements.

[0069] However, such drive elements 50 are not necessarily limited to those shown in the drawings, and can be formed into a wide variety of three-dimensional shapes depending on the specifications, types, and shapes of each package.

[0070] Here, the light-emitting elements 40 can be arranged symmetrically in a diagonal or cross shape around the driving element 50, for example, as shown in Figures 9 to 12, in order to achieve wide coverage of the optical path.

[0071] To give a more specific example, the light-emitting element 40 may be two or more LEDs (four in the drawing) arranged in the front left, front right, rear left, and rear right directions around the drive element 50, as shown in Figure 11. However, the arrangement of the light-emitting element 40 is not necessarily limited to the drawing, and although not shown, the light-emitting element 40 may also be two or more LEDs arranged in the front, rear, left, and right directions around the drive element 50.

[0072] The wide-range diffusion lens 70 can be a type of optical component that diffuses the light generated by the light-emitting element 40.

[0073] To give a more specific example, the wide-range diffusion lens 70 may include at least one or more light-transmitting or light-converting components from among silicon, epoxy, fluorescent layers, quantum dots, light-transmitting materials, and combinations thereof, which are assembled or molded on the wiring layer 30.

[0074] Here, the configuration and role of the wide-range diffusion lens 70 may be the same as those of the wide-range diffusion lens 70 of the present invention, as described in detail with reference to Figures 1 to 8. Therefore, a detailed explanation of it will be omitted.

[0075] Therefore, when power signals, power supply signals, digital input signals, etc. are input via the terminal layer 20 formed on the lower surface of the substrate 10, each electrical signal is transmitted to the wiring layer 30 formed on the upper surface of the substrate 10 via the through-electrode T, and these input signals can first be input to the drive element 50.

[0076] Next, the drive signals of the drive element 50 are applied to the four light-emitting elements 40 via the wiring layer 30 by each input signal, and are diverged over a wide area by the multi-focus light source, and a digital output signal can be output again via the wiring layer 30, the through electrode T and the terminal layer 20.

[0077] At this time, the light generated by the light-emitting element 40 is uniformly diffused over a wide area via the wide-range diffusion lens 70, while simultaneously preventing the formation of dark areas and greatly improving light uniformity.

[0078] Figure 13 is a plan view showing the light irradiation area A of the wide-area light-emitting drive package 100 shown in Figure 9.

[0079] As shown in Figure 13, the light irradiation area A of the wide-area light-emitting drive package 100 according to some embodiments of the present invention can sufficiently cover the backlight area B. Therefore, while reducing the thickness of a single backlight unit, a sufficient backlight effect can be obtained with just the wide-area light-emitting drive package 100. At the same time, when applying the backlight unit, the complexity of the circuit of the printed circuit board can be minimized, the light irradiation area can be widened, the light efficiency can be improved, the number of required components can be greatly reduced, and each component such as the wide-area diffusion lens can be integrated, preventing component deviation and twisting of the direction of light.

[0080] Figure 14 is a plan view showing a backlight unit 1000 according to some embodiments of the present invention.

[0081] As shown in Figure 14, a backlight unit 1000 according to some embodiments of the present invention may be configured by mounting the above-described wide-area light-emitting drive package 100 on a bar-type or fork-type printed circuit board 1002 formed inside a square frame-shaped frame 1001.

[0082] Therefore, the backlight unit 1000 of the present invention can minimize the complexity of the circuit of the printed circuit board 1002, widen the light irradiation area, improve light efficiency, greatly reduce the number of components required, and integrate each component as the molding member acts as a lens, preventing component deviation and twisting of the direction of light.

[0083] Figure 15 is a plan view showing a display device 2000 according to some embodiments of the present invention.

[0084] As shown in Figure 15, in a display device 2000 according to some embodiments of the present invention, the above-mentioned multiple wide-area light-emitting drive packages 100 can form pixels and be arranged in M ​​rows and N columns to constitute a display screen as a whole.

[0085] Therefore, the display device 2000 of the present invention has a wide viewing angle, resulting in good visibility. It does not require additional driver ICs or other components, and by reducing the number of parts and processes, it can lower the unit cost of the product and significantly improve productivity.

[0086] Figure 16 is an exploded perspective view of the components of a wide-range light-emitting drive package 200 according to some other embodiments of the present invention, Figure 17 is a plan view of the wide-range light-emitting drive package 200 of Figure 16, and Figure 18 is a cross-sectional view of the wide-range light-emitting drive package 200 of Figure 16.

[0087] As shown in Figures 16 to 18, a metal substrate pad P1 is formed on at least a portion of the substrate 10 of a wide-range light-emitting drive package 200 according to some embodiments of the present invention, a metal lens pad P2 is formed on at least a portion of the wide-range diffusion lens 70, and a solder member S can be formed between the substrate pad P1 and the lens pad P2 so that the substrate pad P1 and the lens pad P2 can be metal-bonded.

[0088] Here, the substrate pad P1 may be made of the same material as the wiring layer 30, and may be formed together with the wiring layer 30.

[0089] Furthermore, the lens pad P2 can be formed by insert injection molding during lens molding, and the solder member S can be formed by a wide variety of methods, such as reflowing solder paste applied between the substrate pad P1 and the lens pad P2.

[0090] Furthermore, the substrate pad P1 and lens pad P2 may be arranged in a cross shape between each light-emitting element 40. However, the position and arrangement of such substrate pad P1 and lens pad P2 can be applied in a wide variety of forms.

[0091] Therefore, when high temperatures are generated, the thermal conductivity and heat dissipation performance can be increased, improving the electrical reliability and durability of the product. Furthermore, the rigidity can be increased by the metal bonding method, significantly improving the strength and mechanical reliability of the product.

[0092] Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely illustrative, and a person with ordinary skill in the art will understand that a variety of modifications and equivalent other embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical idea of ​​the appended claims. [Explanation of Symbols]

[0093] 10 circuit boards 20 terminal layer 21 Pad section 22 Extension 30 wiring layer 31 1st wiring section 32 2nd wiring section 33 Third wiring section T Through electrode T1 Pad Through Electrode T2 extended through electrode 40 light-emitting elements 50 Drive element 60 Protective component 61 Flat Molding Members 62 Single concentric molding member 63 Prism-type molding member 64. Multi-concentric molding member 70, 80, 90 Wide-angle diffusion lenses 71 Incidence plane 71a bottom 71b Incidence groove P vertex 72 Ejection surface 73 Center pillar part 73a Outer diameter surface 73b Center groove 73b1 Center bottom point part 73b2 Center convex inclined surface part 74 Frame Dome Section 74a Spherical 74b Frame groove 74b1 Frame base point 74b2 Frame convex inclined surface part 100, 200 Wide-Range Illumination Driven Package P1 PCB pad P2 Lens Pad S Solder component A Light irradiation area B Backlight area 1000 backlight units 1001 Frame 1002 Printed circuit board 2000 display devices

Claims

1. The incident surface to which light generated by the light-emitting element is incident, and It includes an output surface that refracts or reflects the light incident from the incident surface and then emits it to a widely diffused area, The aforementioned ejection surface is, The central column is formed in an overall cylindrical shape, and At least one frame dome portion is integral with the central column portion and formed around the central column portion, with at least one portion of which is formed in a dome shape or hemispherical shape, A wide-range diffusion lens, including...

2. The wide-area diffusion lens according to claim 1, wherein the central column portion has an outer diameter surface formed on its side surface and a central recessed groove portion formed on its upper surface.

3. The central recessed groove portion is A central base portion formed in a concave shape on the central axis, and The central convex inclined surface portion is formed to be inclined in a funnel shape overall toward the central base, and its cross-section is formed to be convex upwards. A wide-range diffusion lens according to claim 2, including the above.

4. The aforementioned frame dome section is A wide-area diffusion lens according to claim 1, wherein a spherical surface is formed on at least a portion of the side surface, and a recessed frame groove is formed on the outer diameter surface of the central column or on the upper surface near the outer diameter surface.

5. The aforementioned frame groove portion is The frame base point formed on the upper surface, and The frame convex inclined surface portion is formed to be inclined in a funnel shape overall toward the bottom point of the frame, and the cross-section is formed to be convex upwards. A wide-range diffusion lens according to claim 4, including the above.

6. The incident surface is, The bottom is formed in an overall flat shape, and An ingress groove is formed in a concave shape at the bottom, corresponding to the light-emitting element, and is formed in an overall dome shape towards the apex. A wide-range diffusion lens according to claim 1, including the above.

7. The wide-area diffusion lens according to claim 1, wherein four frame dome sections are formed around one central column section so that light can be dispersed into an overall rectangular area corresponding to the four light-emitting elements.

8. The wide-area diffusion lens according to claim 1, wherein two frame dome portions are formed around one central column portion so that light can be dispersed into a linear region overall, corresponding to two light-emitting elements.

9. The wide-area diffusion lens according to claim 1, wherein three frame dome portions are formed around one central column portion so that light can be dispersed into an overall triangular region corresponding to three light-emitting elements.

10. substrate, A terminal layer formed on one surface of the substrate, A wiring layer formed on the other side of the substrate and electrically connected to the terminal layer using through electrodes, At least one light-emitting element, mounted on a portion of the wiring layer and positioned on the outer edge of the substrate, A driving element mounted on another portion of the wiring layer, positioned at the center of the substrate, and for driving the light-emitting element, It includes a wide-range diffusion lens that diffuses the light generated by the light-emitting element, The aforementioned wide-range diffusion lens is The incident surface to which light generated by the light-emitting element is incident, and It includes an output surface that refracts or reflects the light incident from the incident surface and then emits it to a widely diffused area, The aforementioned ejection surface is, The central column is formed in an overall cylindrical shape, and At least one frame dome portion is integral with the central column portion and formed around the central column portion, with at least one portion of which is formed in a dome shape or hemispherical shape, A wide-range light-emitting drive package, including...

11. The wide-range light-emitting drive package according to claim 10, wherein a plurality of light-emitting elements are arranged symmetrically in a diagonal or cross shape around the drive element for wide coverage of the light path.

12. The wide-range light-emitting drive package according to claim 10, wherein the light-emitting elements are arranged in the front left, front right, rear left, and rear right directions, respectively, with respect to the drive element, or two or more LEDs are arranged in the front, rear, left, and right directions, respectively.

13. The wide-range light-emitting drive package according to claim 10, wherein the light-emitting element includes at least one of a red LED, a green LED, a blue LED, a white LED, and a combination thereof.

14. The wide-range light-emitting drive package according to claim 10, wherein the light-emitting element is a micro-LED or a mini-LED, and the driving element is a driver IC with one or more channels for driving the micro-LED.

15. A metal substrate pad is formed on at least a portion of the substrate. A metal lens pad is formed on at least a portion of the wide-range diffusion lens. The wide-range light-emitting drive package according to claim 10, wherein a solder member is formed between the substrate pad and the lens pad so that the substrate pad and the lens pad can be metal-bonded.

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