LED device for surface light source

Abstract

The present invention relates to an LED device of a surface light source, comprising a circuit board, at least one power input and at least two LED Bar components, wherein the at least two LED Bar components are arranged in a staggered manner; each LED Bar component is composed of a plurality of LED Bars arranged in a linear manner on the circuit board; each of the plurality of LED Bars is a straight strip structure and is provided with a plurality of LED crystals of the same type, wherein the plurality of LED crystals are arranged in a linear manner at equal intervals. The present invention can effectively solve the problem of a complicated heat sink design or excessive size due to excessive energy consumption, and can also improve the problem of visual uneven surface light source, uneven brightness, or inability to achieve a larger surface light source area with a small number of LEDs in existing lamps using LEDs as light sources, effectively improving the high quality of the lamp body, and obtaining a primary lens structure with high light utilization efficiency and precisely controllable light shape, which has excellent effects when applied in the field of automotive lighting.

Description

Technical Field

[0001] The invention relates to an LED device for a surface light source, in particular to an LED device for a wide-angle surface light source that can be applied to various vehicle lamp structures. Background Art

[0002] In the prior art, LEDs have many characteristics such as high brightness, energy saving, multiple colors and fast changes, and have been widely used in various lighting fields that require light sources. In the field of automobile lights, LEDs have become the main light source. As we all know, in addition to providing necessary road lighting during the driving process of the car, another important function of automobile lamps is to send signals (signs) or alarms to other vehicles or pedestrians to make them pay attention to safety. From a functional point of view, automotive signal lights mainly include position lights, turn signals, brake lights, etc.

[0003] As brand recognition is increasingly sought after, signal lights in automotive lamps are no longer limited to providing signal functions, but are also an important medium for highlighting brand styling features. In order to realize various cool styling ideas, traditional light source technology is no longer able to cope with the situation, and more and more new technologies and materials are being applied to automotive signal lights. Uniform surface light sources are the future trend of automotive signals, and the rising trends from 2D display to 3D display are: first incandescent lamps (and halogen lamps), then LED lamps (i.e., direct-down LED lamps), then LED lamps combined with diffusion materials, then LED lamps with special structures, and finally OLED lamps. The present invention will take LED lamps with special structures as the starting point to develop LED devices with wide-angle surface light sources.

[0004] The product characteristics of the three main light sources of currently available vehicle signal lights are analyzed and explained as follows:

[0005] 1. Direct-down LED headlights:

[0006] Advantages: Direct-type LED features multiple light sources and high efficiency.

[0007] Disadvantages: The problem with direct-type LED light sources is that the light source is not uniform enough.

[0008] 2. Headlights assembled with LED+diffusion materials:

[0009] Advantages: The characteristics of LED + diffusion material are that fewer LEDs are used.

[0010] Disadvantages: The problem with LED+diffusing material is that the structure is relatively large and the design space is small. Due to the brightness attenuation of the diffusion material, the headlights that require higher LED brightness cannot be used.

[0011] 3. Technical advantages of OLED car lights:

[0012] Advantages: The main characteristics of OLED are uniform lighting, thin and light structure, energy saving and carbon reduction.

[0013] Disadvantages: The bottleneck and problem of OLED light source is low production capacity and extremely high cost of customized light source. Generally speaking, the cost of OLED is about 5 times that of ordinary LED, and the life span is short. OLED is also called organic light-emitting semiconductor. The organic materials in its components are easy to react with oxygen in the environment, making the luminous area gradually decrease. Therefore, the average life span of OLED is only 6000hr (LED light source is more than 20000hr) and the overall brightness is low.

[0014] The previous patent case of uniform surface light source, US8497519, patent name: BATWING LED WITH REMOTEPHOSPHOR CONFIGURATION, disclosed the following technical disadvantages in its specification: 1. The manufacturing mold of the lens is fixed, and the LED chips are arranged in four corners, which cannot be flexibly adjusted for different customized lamps; 2. The manufacturing process is complicated, and there is no ability to simplify the process, and there is no consideration of economic value.

[0015] Patent predecessor US8382337, patent name: LIGHTING DEVICE, LIGHT SPREADING PLATE AND MEHTOD FOR MANUFACTURING THE SAME, the technical disadvantages disclosed in the specification are: 1. It does not have a linear arrangement and combination, which is not easy to meet the needs of customized lamp shapes; 2. It does not have a better wide-angle uniform surface light source diffusion effect; 3. The number of LED grains is large; 4. When used in car lights, it cannot meet the uniformity requirements of visually invisible granular light sources.

[0016] Patent predecessor US2011 / 0141729A1, patent name: RETROFIT-STYLE LAMP AND FIXTURE, EACH INCLUDING A ONE DIMENSIONAL LINEAR BATWING LENS, its technical disadvantages are: 1. It is a direct replacement LED lamp tube; 2. The LED light source is a single LED component structure (not LED chips), each arranged in a separate dot shape; 3. The uniformity of its surface light source is poor, and it is easy to lack concentrated luminous brightness; 4. It is completely unusable in the application of car lights.

[0017] Patent predecessor US2015 / 0036347A1, patent name: COMPOUND LENS AND LED LIGHT SOURCEDEVICE INCORPORATING THE SAME, technical disadvantages are: 1. The lens manufacturing mold is fixed and cannot be flexibly adjusted for different customized lamps; 2. The lens is not directly attached to the LED light source, and there is a space structure between the two, which reduces the luminous intensity; 3. It does not have the ability of modular process and has no economic value in manufacturing. Summary of the invention

[0018] The present invention is an LED device for a surface light source. In view of the shortcomings of the above-mentioned prior art, a structure and manufacturing technology of an LED device for a wide-angle surface light source that can emit light uniformly visually is proposed. The LED device for a wide-angle surface light source is formed by one or more LED Bar components disclosed by the present invention on a carrier surface or a circuit board. The LED Bar component is provided with a plurality of LED Bars, each of which contains a plurality of LED grains. The LED grains can be in a straight line, curved or curved shape, and are closely arranged. In order to meet the requirement of visually uniform light emission, the LED grain arrangement spacing is not greater than 2 mm as a principle. The LED Bar itself has a primary lens structure, one of the characteristics of which is that the thickness is abnormally thin and the width is extremely narrow.

[0019] The light emitted by the LED device of the wide-angle surface light source is visually continuous and evenly distributed in the long strip direction (also called the longitudinal direction), and the staggered arrangement of multiple LED Bar components can present the effect of a uniform surface light source. Another feature of the light-emitting device is that the special primary lens design of the LED Bar can be utilized to efficiently meet the light distribution requirements of the application lamps (such as car lights). In particular, for the application field of streamlined car lights designed with a translucent light guide plate (light blade), the LED device of the wide-angle surface light source disclosed in the present invention can meet the requirement of a more uniform light source visually due to the close arrangement of the LED light-emitting crystals, and because of the structure of the primary lens and the characteristics of extremely thin thickness and extremely narrow width, the emitted light can effectively enter the translucent light guide plate to meet the light distribution requirements of the car lights.

[0020] The purpose of the present invention is not only to use the light emitted by tiny LED crystal grains as a surface light source, but also to design an optical lens to obtain a lens structure with a small size, high light utilization efficiency and precisely controllable light shape, so that it can be applied in the field of car lights, which can effectively solve the problem that the light bar size is too wide and cannot match the narrow light guide, and can also solve the problem that the light bar size is too thick and cannot match the narrow lamp body space, and the present invention can also improve the technical bottleneck that a larger surface light source area cannot be achieved with a small number of LEDs. In addition, the present invention can meet the relevant provisions of the lighting regulations requiring a higher central point and its vicinity brightness, and the light shape of the present invention is symmetrical, so it does not require an excessive number of light lumens, so there is no problem of energy consumption, and there is no problem of complex heat sink design or excessive size due to excessive energy consumption. At the same time, the present invention can also improve the problem of uneven brightness or uneven surface light source in the existing technology of LED-based lamps, and effectively improve the high quality of the lamp body. Therefore, the present invention can fully meet the market demand for car lights to be transparent (water clear) and high quality.

[0021] In order to achieve the above-mentioned object, the LED device of the surface light source of the present invention includes: a circuit board, a connection circuit is provided on the upper layer of the circuit board; at least one power input is electrically coupled to the circuit board; at least two LED Bar components are provided on the circuit board and electrically coupled to the at least one power input; each of the at least two LED Bar components is composed of a plurality of LED Bars arranged linearly on the circuit board; each of the plurality of LED Bars is a straight bar structure and is provided with a plurality of LED grains of the same type, and the plurality of LED grains are arranged linearly with an equal spacing between 0.15 mm and 2.8 mm; wherein the spacing between adjacent LED Bars in the plurality of LED Bars is the same as the equal spacing between the plurality of LED grains; and each of the plurality of LED Bars is provided with a wide-angle lens to diffuse the lateral cross-sectional light emission angle of each of the plurality of LED Bars; and the wide-angle lenses are integrally formed when each of the plurality of LED Bars is molded and packaged, and each covers the plurality of LED grains in each of the plurality of LED Bars.

[0022] In one embodiment, each of the at least two LED Bar components is a strip-shaped structure, and the strip-shaped structure is a linear strip-shaped structure.

[0023] In one embodiment, the wide-angle lens of each LED Bar in the plurality of LED Bars has a cross-sectional structure of a double-arc upper surface structure, two side edges of the cross-sectional structure are vertical surface structures, and the wide-angle lens is a straight strip structure.

[0024] In one embodiment, the at least two LED Bar components are configured with multiple LED Bar components, and the multiple LED Bar components are arranged in a staggered manner on the supporting surface, wherein the staggered arrangement between the multiple linear long strip structure LED Bar components is staggered in the front, back, left and right to form a uniform surface light source.

[0025] In one embodiment, the strip-shaped structure of each LED Bar component of the at least two LED Bar components is an arc-shaped strip-shaped structure, and the arc lengths of the LED Bar components of the multiple arc-shaped strip-shaped structures are paired in pairs and have different arc lengths. Then, according to the different arc length sizes, the paired LED Bar components with different arc lengths are arranged in sequence and arranged in a symmetrical and staggered manner on the supporting surface to form a uniform circular light source.

[0026] In one embodiment, a high-reflection optical structure is provided on the double-arc upper surface structure of each wide-angle lens in the multiple LED Bars. The high-reflection optical structure is a long strip structure and covers the middle recess of the double-arc upper surface. The length of the high-reflection optical structure is the same as the length of the wide-angle lens, and the width of the high-reflection optical structure is less than or equal to the distance between the double vertices of the double arc.

[0027] In one embodiment, the circuit board is a flexible circuit board or a soft circuit board, and all or part of the multiple LED Bars are shorter LED Bars composed of a smaller number of LED chips of the same type, so that the LED device of the wide-angle surface light source has flexibility.

[0028] In one embodiment, the multiple LED dies of the same type in each LED Bar of the multiple LED Bars are all connected in series, so that the multiple LED dies of the same type in the multiple LED Bars can be lit up at the same time.

[0029] In one embodiment, each of the plurality of LED Bars on the circuit board is connected to the power input via the independent connection circuit, so that each of the plurality of LED Bars can be controlled by an external power source or signal source and lit individually to present a dynamic lighting effect.

[0030] In one embodiment, a fluorescent material is coated between each LED die in the plurality of LED Bars and the wide-angle lens.

[0031] In one embodiment, each of the plurality of LED Bars is electrically connected to at least one positive power input circuit and at least one negative power input circuit in the connection circuit; and each of the plurality of LED Bars itself further includes:

[0032] A substrate, wherein a plurality of crystal regions and a plurality of electrode regions are disposed on the front surface of the substrate, and a plurality of electrode regions are disposed on the bottom surface of the substrate;

[0033] The plurality of LED dies of the same type are closely arranged in a linear shape in the plurality of crystal regions respectively and correspondingly;

[0034] The wide-angle lens covers the multiple LED chips and the substrate. The wide-angle lens is formed by a molding packaging process. The molding packaging process fills the mold cavity with resin. The mold cavity of the mold is processed and formed according to the required size of the wide-angle lens. The substrate with the multiple LED chips of the same type is placed on the upper mold, and then the mold is closed and baked to complete the packaging, forming a wide-angle lens with a diffused light angle effect and completely covering the multiple LED chips.

[0035] A connector is provided on the circuit board, and the connector is electrically connected to the positive power input circuit and the negative power input circuit in the connection circuit, respectively, to connect to an external input power supply.

[0036] In one embodiment, the multiple LED Bars in the multiple LED Bar assemblies are composed of two types of LED Bars emitting light of different colors, all LED Bars emitting light of a first color are arranged in a line or an arc on the circuit board, and all LED Bars emitting light of a second color are arranged in another line or an arc on the circuit board, and all LED Bars emitting light of the first color and all LED Bars emitting light of the second color are parallel to each other or symmetrically arranged side by side on the circuit board.

[0037] In one embodiment, the present invention includes at least one LED driver IC, which is arranged on the circuit board, and each LED Bar among the multiple LED Bars is electrically connected to the LED driver IC via the connecting circuit on the circuit board, and the LED driver IC is electrically connected to the power input via the connecting circuit on the circuit board.

[0038] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a perspective schematic diagram of a first embodiment of the present invention;

[0040] Figure 2A A schematic top view of a manufacturing structure in a first embodiment of the present invention;

[0041] Figure 2B It is a bottom schematic diagram of the manufacturing structure in the first embodiment of the present invention;

[0042] Figure 2C It is a schematic diagram of circuit symbol connection of the first embodiment of the present invention;

[0043] Figure 3 A perspective schematic diagram of a manufacturing structure in a second embodiment of the present invention;

[0044] Figure 4 A perspective schematic diagram of a manufacturing structure in a third embodiment of the present invention;

[0045] Figure 5 is a schematic top view of a fourth embodiment of the present invention;

[0046] Figure 6 is a schematic top view of a fifth embodiment of the present invention;

[0047] Figure 7 is a top view schematically showing a sixth embodiment of the present invention;

[0048] Figure 8 is a schematic top view of a seventh embodiment of the present invention;

[0049] Fig. 9A is a perspective schematic diagram of an eighth embodiment of the present invention;

[0050] Fig. 9B is a perspective schematic diagram of a ninth embodiment of the present invention;

[0051] Fig. 10A is a perspective schematic diagram of a tenth embodiment of the present invention;

[0052] Fig. 10B A perspective view of the eleventh embodiment of the present invention

[0053] Fig. 10C A perspective view of a twelfth embodiment of the present invention

[0054] Fig.11A is a schematic diagram of light emission according to a first embodiment of the present invention;

[0055] Fig. 11B is a schematic diagram of light emission according to an eighth embodiment of the present invention;

[0056] Fig. 11C FIG. 4 is a schematic diagram of light emission according to a ninth embodiment of the present invention. DETAILED DESCRIPTION

[0057] The present invention discloses an LED device with a surface light source, and reveals a method that can effectively solve the problem that existing vehicle lamps with LED as light sources often have uneven brightness or granular bright spots or uneven distribution of the surface light source in presenting the visual effect of the surface light source. The present invention can effectively enhance the high quality of the lamp body; and can use a structure in which multiple LED crystal grains (plurality LED chips) are tightly arranged in a linear shape according to the pre-design requirements, and combine with a silicone packaging process to complete a lens manufacturing and packaging structure, and after cutting, various different LED bars (called LED light strips, or sections) can be made; the present invention can also select various appropriate LED bars or LED light strips according to the design requirements, match with other necessary electronic parts, connector driver ICs, and then use surface mounting technology to mount the LED crystal grains on a circuit board selected according to the design requirements to complete the production of the LED light-emitting device with a wide-angle surface light source.

[0058] Reference will be made to the accompanying drawings below to more fully describe various exemplary embodiments, and some exemplary embodiments are shown in the accompanying drawings. However, the concepts of the present invention may be embodied in many different forms and should not be construed as being limited to the exemplary embodiments described herein. Specifically, such exemplary embodiments are provided so that the present invention will be detailed and specific, and will fully convey the scope of the concepts of the present invention to those skilled in the art. In the accompanying drawings, the sizes and corresponding distances of the sizes of LED dies, LED Bars, LED Bar components, light-emitting diodes, circuit boards, connectors or ICs may be exaggerated for clarity, where similar or similar English labels or numbers always indicate similar or related components.

[0059] It should be understood that although the terms may be used in this article, including the first, second, third..., these terms are used to clearly distinguish one component from another component, and do not have a certain order relationship of the number of components. As used in this article, the left side or right side, left end or right end, left side or right side, etc., these terms are used to clearly distinguish one side and endpoint of a component from the other side and endpoint of the corresponding component, or to distinguish the corresponding connection position relationship between one component and another component, or one side and another side are different positions. It is not used to limit the order relationship or position relationship presented by the text serial number, and it is not necessarily a continuous relationship in numbers; that is, from another perspective, the right side (or left side) of the component can be renamed as the left side (or right side) without affecting the essence of the technology. Furthermore, the term "at least one" may be used in this article to describe the technology implemented by one or more components. In addition, the term "multiple" may also be used in this article to describe multiple components or multiple components, but these multiples are not limited to the technology implemented by two, three or four or more numbers. The above is explained first.

[0060] See also Figure 1 As shown, a schematic diagram of the first embodiment of the LED device of the surface light source of the present invention discloses the structure of a single LED Bar 10, wherein the LED Bar 10 includes a substrate 12 and a wide-angle lens 11. A plurality of crystal regions, a plurality of electrode regions, and a plurality of LED chips (plurality LED chips) are disposed on the upper surface of the substrate 12. The wide-angle lens 11 covers the plurality of crystal regions, the plurality of electrode regions, and the plurality of LED chips. In actual use, the substrate 12 may be a printed circuit board (PCB), a flexible printed circuit board (FPCB), or a multi-layer printed circuit board, wherein the relevant descriptions of the plurality of crystal regions and the plurality of electrode regions will be described in detail below. Figure 2A It will be described in detail in the following section.

[0061] exist Figure 1In the invention, the wide-angle lens 11 covers a plurality of LED chips 21-24 and a substrate 12 (or circuit board). In the actual production, the plurality of LED chips 21-24 can adopt the chip direct packaging process (COB) to allow the plurality of LED chips 21-24 to be tightly arranged linearly on the substrate 12 to form a light bar structure; various appropriate LED light bars can also be selected, matched with other necessary electronic parts and connectors, and the surface mounting process can be adopted to mount the components on the circuit board selected according to the design requirements, but the present invention is not limited to this. After that, the production and packaging process of the wide-angle lens 11 is completed in combination with silicone packaging, and various LED Bars 10 are made after cutting. In actual production, the length of the LED Bar 10 can be 1.8-30mm. This range varies according to the yield, surface mounting process capability and application requirements, and depends on the size, number and spacing of the LED chips. In practice, the width is about 0.7-1.9 mm, and the height is about 0.7-1.9 mm, depending on the size of the LED die and the size of the primary lens. It should be noted that the scope of implementation of the present invention is not limited to this.

[0062] In addition, when implementing a plurality of LED chips 21-24 (plurality LED chips), the spacing between each adjacent LED chip 21-24 fixed on the substrate 12 (or circuit board) is basically 0.15mm-2.8mm, and in actual production it is less than 1.9mm, and the spacing between each adjacent LED chip 21-24 is equal. The wide-angle lens 11 has a double-arc upper surface appearance structure, and the two sides of the cross section are vertical surface structures, and the wide-angle lens 11 can be a straight strip structure, or a curved long strip structure (referring to the curved shape formed by the curved substrate 12 as a whole). The present invention can also use direct surface mounting (SMT) to electrically connect the LED chips 21-24 to the substrate 12, or use wire bonding (wire bounding) to electrically connect.

[0063] Figure 2A As shown, with Figure 1As shown, a single LED Bar 10 includes first to fourth LED chips 21-24, first to fourth crystal regions 31-34, first upper electrode region 37, second upper electrode region 38 and electrode region 35, wherein the first to fourth LED chips 21-24 are electrically connected in series through the first to fourth crystal regions 31-34, and are simultaneously turned on and lit. In one embodiment, the first upper electrode region 37 and the second upper electrode region 38 can be the positive electrode region and the second upper electrode region 38 can be the negative electrode region. The positive electrode region and the negative electrode region can be used as the electrode electrical connection region between adjacent LED Bars 10, so as to facilitate connecting multiple LED Bars 10 in series to form an LED Bar assembly 50 (such as Figure 3 On the other hand, the electrode region 35 and the first crystal region 31 can also be used as electrode connection points of the left and right adjacent LED Bars 10, which facilitates the circuit designer to make electrode connections according to different designs.

[0064] Depend on Figure 2A It can be further understood that the area of ​​the first crystal region 31 is smaller than that of the second crystal region 32, the third crystal region 33 and the fourth crystal region 34, and the electrode region 35 is smaller than that of the first crystal region 31, the second crystal region 32, the third crystal region 33 and the fourth crystal region 34; combined with the placement positions of the first to fourth LED chips 21-24 in the respective crystal regions 31-34, it can further provide the adjacent spacings in the two adjacent LED Bars 10 to be the same as the equal spacings between the multiple LED chips 21-24, so that the structure composed of the multiple LED Bars 10 arranged linearly has a uniform surface lighting effect, and will not cause uneven lighting problems due to the adjacent spacings in the adjacent LED Bars 10 being different from the equal spacings between the multiple LED chips 21-24.

[0065] Figure 2B As shown, in one embodiment, different electrode areas are provided on the back of the substrate 12 (or circuit board), including a first lower electrode area 41 and a second lower electrode area 42. These electrode areas can guide the electrodes on the upper surface of the substrate 12 to the first lower electrode area 41 and the second lower electrode area 42 on the lower surface through guide holes (not shown in the figure), so that the LED Bar 10 can be connected to other circuits through the circuit carried by its bottom. That is, the LED Bar 10 of the present invention can be electrically connected to the adjacent LED Bar 10 via the electrodes on the upper surface of the substrate 12, and can also be electrically connected by transmitting electrode signals through the lower surface of the substrate 12, which is conducive to the design of convenient circuit connection.

[0066] Figure 2C Shown is based on Figure 2A and Figure 2B The circuit layout structure and the corresponding circuit diagram of the circuit symbol show that the circuit formed by the first to fourth LED chips 21-24 is an LED light-emitting diode component connected in series.

[0067] In the above, the wide-angle lens 11 covers the first to fourth LED chips 21-24 and the substrate 12 (or circuit board) and is made by silicone molding, that is, a columnar mold (not disclosed in the figure) is provided to cover the substrate 12 on which the first to fourth LED chips 21-24 are already provided. The interior of the columnar mold has the optical shape that the wide-angle lens 11 is to be formed. The columnar mold is filled with glue. After the wide-angle lens 11 is formed, the columnar mold is removed to form a wide-angle lens 11 and the substrate 12 as a strip-shaped LED light strip and an LED device with a wide-angle surface light source formed in one piece. The first to fourth LED chips 21-24 are embedded in the wide-angle lens 11. On the other hand, it is also possible to use an entire long cylindrical mold to cover a plurality of LED chips of the same type and kind to form a long wide-angle lens 11, and then cut it into individual LED Bars 10 according to the number of LED chips required to be covered in a single LED Bar 10. The present invention is not limited to this point.

[0068] In the above description, for the multiple LED Bars 10, the wide-angle lens 11 of each LED Bar 10 is a plurality of dies 21-24 that are individually covered by itself, that is, each LED Bar 10 is provided with a wide-angle lens 11, so that the lateral cross-sectional light-emitting angle of each LED Bar 10 in the multiple LED Bars 10 can be diffused; and the wide-angle lens 11 is an integrally formed structure when each LED Bar 10 in the multiple LED Bars 10 is molded and packaged. Figure 1 In the disclosed embodiment, four LED chips of the same type and kind are embedded in the wide-angle lens 11 to form an LED Bar 10. However, the present invention is not limited thereto, and the designer can form an LED Bar 10 by enclosing two, three or six LED chips of the same type and kind with one LED Bar 10 according to his own needs.

[0069] Figure 3As shown in FIG. 1 , a perspective view of the structure of an LED Bar assembly 50 according to a second embodiment of the present invention is disclosed, in which a plurality of LED Bars 10 are arranged in a line on a carrier, and the carrier may be a circuit board or a flexible circuit board, and a plurality of connection lines are provided on the flexible circuit board, so that the plurality of LED Bars 10 can be electrically connected to an external control circuit. It should be emphasized that the spacing between the plurality of LED Bars 10 is equal to the equal spacing between the plurality of LED dies 21-24. Figure 3 As shown, the LED Bar component 50 is a long strip structure, and the long strip structure is a straight long strip structure. In practical application, Figure 3 The disclosed LED Bar assembly 50 itself is also one of the embodiments of the LED device of the wide-angle surface light source of the present invention.

[0070] Figure 4 As shown, the structural perspective view of the LED Bar assembly 60 of the third embodiment of the present invention is disclosed, where a plurality of LED Bars 10a are arranged in a curved line (or arc shape) on a carrier, and the carrier can be a circuit board or a flexible circuit board, and a plurality of connection lines are arranged on the flexible circuit board, so that the plurality of LED Bars 10a can be electrically connected to an external control circuit. It should be emphasized that the spacing between the adjacent plurality of LED Bars 10a is equal to the equal spacing between the plurality of LED dies 21-24. Figure 4 As shown, the LED Bar component 60 is a long strip structure, and the long strip structure is an arc-shaped long strip structure. The curvature can be curved to the left or to the right, and of course it can also be partially straight and partially curved, or a continuous curve in an "S" shape. The present invention is not limited in actual production. The LED Bar component 60 with an arc structure includes the plurality of LED chips 21-24 located on the same plane, that is, the light emission directions of the plurality of LED chips 21-24 are all in the same vertical upward direction, and the wide-angle lens 11 is also in the shape of a curved arc. In actual use, Figure 4 The disclosed LED Bar assembly 60 itself is also one of the embodiments of the LED device of the wide-angle surface light source of the present invention.

[0071] Figure 5As shown, a top view of the structure of an LED Bar assembly 50a according to a fourth embodiment of the present invention is disclosed, wherein the assembly includes a circuit board 40a, on which a connector 74, a plurality of connection circuits (the connection circuits include positive input lines 71, 71a, 71b, 71c and negative input lines 72, 72a, 72b, 72c), and a plurality of LED Bars 10 are arranged linearly on the circuit board 40a, and each LED Bar 10 is electrically connected to the connector 74 via a respective aforementioned connection circuit. The conductive layer (i.e., copper foil) on the circuit board 40a is provided with soldering pads (not shown in the figure) and the aforementioned connection circuits, which are arranged in accordance with the recommendations and design requirements of the specification of the parts (e.g., only a plurality of LED Bars 10 and a connector 74 are included in this embodiment). In this embodiment, the power supply or control IC for driving the LED is external (not shown in the figure), and its external power supply or signal source is transmitted to the LED device according to the fourth embodiment of the present invention via the connector 74. In this embodiment, due to the simple design and no additional heat dissipation requirements, the circuit board 40a is a FR4 single-layer printed circuit board (PCB), and the positive and negative input lines 71, 71a, 71b, 71c, 72, 72a, 72b, 72c of all LED Bars 10 are arranged on the front of the circuit board 40a. In this embodiment, a plurality of LEDBars 10 are designed in series with four LED dies 21-24 according to the design of the first embodiment of the aforementioned LED Bar 10, so each LEDBar 10 only needs to connect the positive power input line 71 and the negative power input line 72, and the four LED dies 21-24 inside it can be lit up at the same time using the external input power. The aforementioned connection circuit in the present invention includes the positive power input line 71 and the negative power input line 72.

[0072] At the same time, in this fourth embodiment, the connector 74 provides a plurality of independent positive power input lines 71 and a shared negative power input line 72, so that each LED Bar 10 can be individually lit or lit simultaneously, or can be lit in turn, depending on the design of the external input power supply, to meet the needs of dynamic lighting. When there are other electrical characteristics required, such as electromagnetic interference protection (EMC), current control or signal transmission, the required parts, such as capacitors, resistors, inductors and various ICs, can be installed on the circuit board 40a according to the design requirements, forming another embodiment of the present invention (not shown). In actual application, Figure 5 The disclosed LED Bar assembly 50a itself is also one of the embodiments of the LED device of the wide-angle surface light source of the present invention.

[0073] See also Figure 6As shown, a top view of the structure of the fifth embodiment of the LED Bar assembly 50b of the present invention is disclosed, wherein the circuit board 40b is provided with a connector 71, at least one LED driver IC 76, a connection circuit (the connection circuit includes positive input circuits 71, 71a, 71b, 71c and negative input circuits 72, 72a, 72b, 72c) and a plurality of arc-shaped LED Bars 10b, wherein the plurality of LED Bars 10b are arranged in an arc shape on the circuit board 40b, and each LED Bar 10b is electrically connected to the LED driver IC 76 via the respective connection circuits. Each LED Bar 10b contains six LED chips 33, and this embodiment adopts a circuit design in which three LED chips are connected in series. In this embodiment, due to the complex design, the circuit board 40b is not only curved but also irregular in shape. Due to the complex circuit design and space requirements, the circuit board 40b is a double-layer flexible printed circuit board (FPCB), so that the FPCB where the connector 74 and the LED driver IC 76 are set can be bent downward by 90 degrees to avoid interference with the light guide (not shown in the figure) during subsequent assembly. The bottom copper foil of the circuit board 40b provides additional circuit design (such as Figure 6 As shown by the dotted line) and for heat dissipation, additional thermal conductive patches and aluminum heat sinks (not shown in the figure) can be added if necessary to provide heat dissipation. Because a thin and curved light guide sheet (not shown in the figure) is required, a curved LED Bar 10b is used, similar to the above Figure 4 It is made by the method of LED Bar 10a. Figure 6 Each LED Bar 10b contains six LED crystals, and adopts a circuit design in which three LED crystals are connected in series. Through the circuits provided on the circuit board 40b, such as the two positive power input circuits 71a, 71b and the two negative power input circuits 72a, 72b of the first LED Bar 10b, each LED Bar 10b can be fully lit, partially lit, or staggered, and controlled by the LED driver IC 76. The LED device 50b of the wide-angle surface light source of this embodiment can be bent downward or upward, and of course, it can also be partially straight and partially curved, or a continuously curved "S"-shaped structure. The present invention is not limited in actual production. The present invention can also use LED Bars of different lengths and LED Bars of different curvatures, which are arranged on a circuit board to make an LED device of a wide-angle surface light source, so as to meet the application of lamps with light guides of different shapes. In actual use, Figure 6 The disclosed LED Bar assembly 50 b itself is also one of the embodiments of the LED device of the wide-angle surface light source of the present invention.

[0074] Figure 7 As shown in the sixth embodiment of the present invention, it is explained that Figure 3 The plurality of LED Bar components 50 are arranged in a staggered manner to make the surface light effect of the LED lighting device more diffuse and more evenly distributed, so that the surface light effect of the LED lamp is more optimized and beautiful. The plurality of LED Bar components 50 are mainly arranged in a staggered manner on the bearing surface (such as Figure 7 On the bottom surface of each LED Bar component 51-56, a plurality of LED Bar components 51-56 in a linear strip structure are arranged in a staggered manner, that is, in front, back, left, and right directions, to form a uniform surface light source. Figure 7 In the figure, the left diagram represents the arrangement of LED light sources of a conventional general surface light source, which is mainly arranged in a neat matrix and arranged adjacent to each other. Figure 7 As shown on the right side of the figure, it is the staggered arrangement of the present invention, including the first to sixth LED Bar components 51-56, however, between the first LED Bar component 51 and the second LED Bar component 52, the rightmost LED Bar 10 of the first LED Bar component 51 is aligned to the leftmost LED Bar 10 of the second LED Bar component 52, and they are arranged side by side vertically. That is, the arrangement of the first LED Bar component 51 and the second LED Bar component 52 is to extend to both sides respectively, and the upper and lower adjacent LED Bars 10 aligned in the middle section are the rightmost LED Bar 10 of the first LED Bar component 51 on the top, and the leftmost LED Bar 10 of the second LED Bar component 52 on the bottom. According to the same arrangement, the third to sixth LED Bar components 53-56 are arranged downwards. By Figure 7 It can be clearly seen from the comparison that the staggered arrangement of the first to sixth LED Bar components 51-56 in the right embodiment of the present invention can achieve a uniform light diffusion effect of the surface light source, which is much better than Figure 7 The left icon in the middle shows the surface luminous effect of the traditional adjacent array arrangement. In practical application, Figure 7 The surface light source formed by the staggered arrangement of the first to sixth LED Bar components 51-56 disclosed above is also one of the embodiments of the LED device of the wide-angle surface light source of the present invention. Figure 7 The right side of the figure shows a newly designed surface light source LED using the present invention. Figure 7The left side of the diagram shows the use of a conventional linear light source LED. Thus, the use of the new surface light source LED structure of the present invention on the right side can significantly reduce the number of LEDs used while achieving a better uniform surface light source effect. Obviously, the wide-angle surface light source LED device of the present invention has a great improvement in technical efficacy.

[0075] Figure 8 FIG. 7 is a seventh embodiment of the present invention, which illustrates the process of converting multiple Figure 4 or Figure 6 The arc-shaped (or arc-shaped) arc-shaped long strip LED Bar components 50b, 60 are arranged in a staggered manner to form a circular uniformly emitting LED surface light source, and at the same time, the circular surface luminous effect of the LED light-emitting device can be more diffused and evenly distributed, so that the circular surface luminous effect of the LED lamp can be more optimized and beautiful. The plurality of arc-shaped long strip LED Bar components 50b, 60 are mainly arranged in a staggered manner on the bearing surface (such as Figure 8 On the bottom surface of each LED Bar assembly 61-64, multiple LED Bar assemblies 61-64 are arranged in pairs and symmetrically, and further arranged in a staggered manner between the two, for example, staggered arrangement between the front, back, left, right, top, and bottom, to form a circular uniform surface light source. Figure 8 The LED Bar components 61-64 are included, and each LED Bar component 61-64 exists in pairs, for example, there are two first LED Bar components 61 and two second LED Bar components 62. The two first LED Bar components 61 are respectively set on the two edges of the arc and arranged in a symmetrical manner; the two second LED Bar components 62 are arranged in a symmetrical and staggered manner with the two first LED Bar components 61 in a front-to-back and top-to-bottom manner. The arrangement of the two LED Bar components 61, 62, 63, and 64 is based on different arc lengths, starting from the direction of the center of the circle and gradually spreading outward, and the fourth LED Bar component 64 with a small arc length is staggered in sequence to the first LED Bar component 61 with a longer arc length.

[0076] Figure 8The rightmost outer edge of the first LED Bar component 61 is between the first LED Bar component 61 and the second LED Bar component 62, and is aligned with the leftmost outer edge of the second LED Bar component 62, and is arranged adjacent to each other and spaced apart from each other. That is, the first LED Bar component 61 and the second LED Bar component 62 are arranged to extend to the outside of the arc respectively. According to the same arrangement method, that is, symmetrically staggered and spaced on the supporting surface to form a uniform circular light source, the third and fourth LED Bar components 63-64 are arranged inward. Figure 8 It can be clearly seen that the staggered arrangement of the first to fourth LED Bar components 61-64 in the seventh embodiment of the present invention can achieve a uniform diffusion effect of the surface light source, which is better than the surface light diffusion effect of the general adjacent arc array arrangement. Figure 8 The disclosed interlaced arrangement of the surface light source is also one of the embodiments of the wide-angle surface light source LED device of the present invention. Obviously, the wide-angle surface light source LED device of the present invention has the enhancement and improvement of technical efficacy.

[0077] Fig. 9A FIG. 1 is an eighth embodiment of the LED Bar 10 of the present invention, which differs from Figure 1 The first embodiment disclosed is that a high-reflective optical structure 14 is provided, and the high-reflective optical structure 14 is provided above the double-arc upper surface structure of each wide-angle lens 11, and the high-reflective optical structure 14 is a long strip structure and covers the middle recess of the double-arc upper surface, the length of the high-reflective optical structure is the same as the length of the wide-angle lens 11, and the width of the high-reflective optical structure 14 is between Fig. 9A In the disclosed embodiment, the width is smaller than the distance between the double vertices of the double arc.

[0078] on the other hand, Fig. 9B The structure of the LED Bar 10 of the ninth embodiment of the present invention is different from Fig. 9A The eighth embodiment is that Fig. 9B The width of the highly reflective optical structure 16 is Fig. 9B In the disclosed embodiment, the width is equal to the distance between the double vertices of the double arc.

[0079] Fig. 10A FIG. 1 is a perspective view of the structure of the LED Bar 10 according to the tenth embodiment of the present invention, which differs from Figure 1The difference between the first embodiment and the tenth embodiment is that the LED Bar 10 in the tenth embodiment is provided with a fluorescent material 25 above each LED die 21-24 and between the wide-angle lens 11, and its function is to allow the LED Bar 10 to produce a white light effect through the effect of the fluorescent material 25. That is, when Figure 7 and Figure 8 In the sixth and seventh embodiments disclosed, if the Fig. 10A LEDBar 10 can emit white light, Figure 7 and Figure 8 That is, it can emit white and uniform surface light and is beautiful and elegant LED surface light source.

[0080] Fig. 10B FIG. 1 is a perspective view of the structure of the LED Bar 10 according to the eleventh embodiment of the present invention, which differs from Fig. 10A The tenth embodiment is different in that the LED Bar 10 in the eleventh embodiment is provided with a high-reflective optical structure 14, the high-reflective optical structure 14 is provided above the double-arc upper surface structure of the wide-angle lens 11, and the high-reflective optical structure 14 is a long strip structure and covers the middle recess of the double-arc upper surface, the length of the high-reflective optical structure is the same as the length of the wide-angle lens 11, and the width of the high-reflective optical structure 14 is between Fig. 10B In the disclosed embodiment, the width is smaller than the distance between the double vertices of the double arcs. At the same time, a fluorescent material 25 is provided between each LED die 21-24 and the wide-angle lens 11, and its function is to allow the LED Bar 10 to produce a white light effect through the effect of the fluorescent material 25.

[0081] Fig. 10C The structure of the LED Bar 10 of the twelfth embodiment of the present invention is different from Fig. 10B The eleventh embodiment is that Fig. 10C The width of the highly reflective optical structure 16 is Fig. 10C In the disclosed embodiment, the width is equal to the distance between the double vertices of the double arc. Similarly, a fluorescent material 25 is provided above each LED die 21-24 and between the wide-angle lens 11, and its function is also to allow the LED Bar 10 to produce a white light effect through the effect of the fluorescent material 25.

[0082] Figure 11A-11CAs shown, it is a schematic diagram of the light-emitting angle of the LED Bar 10 corresponding to the first, eighth, and ninth embodiments, that is, the different forms of the high-reflective optical structure. The optical refraction and reflection added by the upper surface shape of the wide-angle lens 11 and the high-reflective optical structure 14, 16 make the light-emitting effects of the three different forms of LED Bar 10 (referring to the first, eighth, and ninth embodiments) different. Generally speaking, the viewing angle of the common LED structure is about 120 to 140 degrees depending on the structure; however, in the embodiment of the present invention, Fig.11A After computer optical simulation analysis, its viewing angle is 161.75 degrees. Fig. 11B After computer optical simulation analysis, its viewing angle is 163.07 degrees. Fig. 11C After computer optical simulation analysis, its viewing angle is 164.12 degrees.

[0083] The length (i.e., the length after the substrate 12 is cut) and the curvature (i.e., the shape after the substrate 12 is cut) of a single LED Bar 10 in the present invention can be determined according to design requirements (including requirements in terms of function, surface mounting SMT, assembly and cost). For the length of the LED Bar 10, for example, the length of a two-LED chip package is less than 2mm; the length of a four-LED chip package is less than 5mm; the length of an eight-LED chip package is less than 9mm; the length of a twelve-LED chip package is less than 214mm; but it should be emphasized that the actual production of the present invention is not limited to this. The distribution (layout) and routing (circuit design) of the conductive layer on the substrate 12 are all designed in advance according to the design requirements of each LED Bar 10. The soldering leads (soldering leads, or terminals) of a single LED Bar 10 are arranged on the bottom layer of the substrate (or circuit board) according to design requirements, and are electrically connected to the upper layer or other layers of the substrate through conductive via holes (not shown in the figure). Furthermore, the substrate or circuit board can be a thin FR4 board, BT board, metal PCB substrate or ceramic PCB substrate. Mainly considering the heat dissipation requirements of the LED crystal itself, the LED Bar substrate will be provided with thermal vias if necessary.

[0084] When the lamps used in the LED device of the surface light source of the present invention have a structure in which the light sources are in the same plane, according to the design requirements of the designer, various rectangular LED surface light sources or circular LED surface light sources of appropriate sizes made according to the design requirements are selected, and can be configured to form surface light sources of various different geometric areas, matched with necessary electronic parts and connectors, and with surface mounting (SMT) technology and process, to complete the production of the LED device of the wide-angle surface light source. On the other hand, when the lamps used in the LED device of the wide-angle surface light source of the present invention are partially or completely geometrically shaped, if the light sources are in the same plane, according to the design requirements, various surface light source LED devices or LED lamps made according to the design requirements and (or) various irregular area LED lamps or LED lamp sections are selected, matched with necessary electronic parts and connectors, and with surface mounting (SMT) technology and process, to complete the production of the irregular area lamps. Alternatively, when part of the lamps used in the wide-angle surface light source LED device of the present invention are irregularly shaped and the light sources are not in the same plane, for the area where the light sources are not in the same plane, the LED device (Slim LEDs) with the shortest length (for example, an LED Bar with only a single or dual LED chips) can be selected according to design requirements, and the other areas in the same plane can be selected appropriately by comparing the above two types of LED Bars, and the necessary electronic components and connectors can be matched with the surface mount (SMT) technology process on a flexible circuit board (Flexible PCB; FPCB) selected according to design requirements to complete the production of the curved light bar.

[0085] In addition, the present invention adopts LED Bar components 50, 50a, 60, 60a of different colors, for example, Figure 7 In the embodiment, the first, third and fifth LED Bar components 51, 53 and 55 use yellow LED dies, while the second, fourth and sixth LED Bar components 52, 54 and 56 use red LED dies. Figure 7 The disclosed wide-angle surface light source LED device can emit two different colors of surface light sources. Figure 8 In the embodiment shown, the first and third LED Bar components 61 and 63 use yellow LED crystals, while the second and fourth LED Bar components 62 and 64 use red LED crystals. Figure 8The disclosed circular wide-angle surface light source LED device can emit two different colors of surface light sources. That is, all LED Bars emitting light of the first color are arranged in a line or arc on a circuit board or a carrier surface, and all LED Bars emitting light of the second color are arranged in another line or arc on the circuit board or the carrier surface, and all LED Bars emitting light of the first color and all LED Bars emitting light of the second color are parallel to each other or alternately symmetrically arranged side by side on the circuit board or the carrier surface.

[0086] Furthermore, when the lamp or carrier used in the surface light source LED device of the present invention is a two-color lamp, two sets of LED Bars of different colors are manufactured according to the manufacturing method of the above-mentioned LED Bar components 50, 50a, 60, 60a and the requirements of various lamps, and are assembled in parallel or symmetrically on a shared carrier or heat sink. A single LED crystal or a single LED Bar can be controlled by a microchip IC and light up in turn, so as to meet the requirements of dynamic (animated function) car lights, and increase the beauty and unique lighting effect of the car lights.

[0087] The LED device of the surface light source described in the present invention, wherein the LED light source can effectively achieve the effect of expanding the light-emitting angle through a primary optical lens design and the overall layout design of the LED Bar 10, and utilizes the lens optical related structure, the staggered arrangement of the LED Bar components and the excellent light-emitting effect of the LED Bar 10 itself, so that the light-emitting uniformity of the LED surface light source is more excellent. In the first, eighth and ninth embodiments of this case, after computer optical simulation analysis, the lens optical related structure and the LED Bar 10 strip structure itself can effectively expand the light-emitting angle. Although, in general, the optical structure will reduce the brightness, the design structure of the present invention can effectively increase the uniformity of the surface light emission and its light-emitting angle. In addition, the present invention can also overcome the technical bottleneck of being unable to achieve a larger surface light source area with a smaller number of LEDs.

[0088] In summary, the surface light source LED device of the present invention not only develops an LED Bar 10 that is thin and small in width but has a large light-emitting angle, but also has an LED light source that is packaged with multiple LED chips 21-24 (plurality LED chips) with a wide-angle lens 11 of a primary optical light distribution lens, which can be multiple LED Bars (light strips) or LED sections (Section LED). Furthermore, multiple LED light bars (LED Bars) (which can be straight LED bars or curved LED bars) can be used to form LED Bar components 50 and 60, which are arranged in a staggered manner to form a wide-angle surface light source LED device with an area diffusion effect, and are mounted on an appropriate printed circuit board PCB using a surface-mounted SMT process to produce a surface light source LED lighting device with high light distribution efficiency and small size, thereby obtaining a new product that is superior to the prior art in terms of performance and cost; and the present invention effectively solves the problem of uneven brightness or granular bright spots or uneven surface light sources in the prior art of lamps using LEDs as light sources. The present invention can enhance the high quality of the lamp body, and can obtain a primary lens structure with a smaller size, high light utilization efficiency, and precisely controllable light shape, which can be effectively used in the field of automotive lighting. Obviously, the technical content of the present invention has extremely strong patent application requirements.

[0089] However, the above description of the present invention is only an example of a preferred embodiment and cannot be used to limit the scope of protection of the present invention. Any local changes, modifications or additional technologies do not deviate from the scope of protection of the present invention.

[0090] Explanation of symbols

[0091] 10, 10a, 10b LED Bar

[0092] 11 wide angle lens 12 substrate

[0093] 14, 16 Highly reflective optical structure

[0094] 21-24 1st - 4th LED chip 25 fluorescent material

[0095] 31-34 first to fourth crystal regions 35 electrode region

[0096] 37 first upper electrode region 38 second upper electrode region

[0097] 40a, 40b circuit board

[0098] 41 first lower electrode region 42 second lower electrode region

[0099] 50, 50a, 50b, 60 LED Bar Components

[0100] 51-56 1st - 6th LED Bar Components

[0101] 61-64 1st - 4th LED Bar Components

[0102] 71, 71a, 71b, 71c positive input line

[0103] 72, 72a, 72b, 72c negative input line

[0104] 74 connector 76 driver IC.

Claims

1. A surface light source LED device, characterized in that: Included are: A circuit board, wherein a connection circuit is provided on an upper layer of the circuit board; at least one power input electrically coupled to the circuit board; At least two LED Bar components are arranged on the circuit board and electrically coupled to the at least one power input; each of the at least two LED Bar components is composed of a plurality of LED Bars arranged in a linear manner on the circuit board; each of the plurality of LED Bars is a straight bar structure and has a plurality of LED dies of the same type arranged therein, and the plurality of LED dies are arranged in a linear manner with an equal spacing between 0.15 mm and 2.8 mm; Each of the plurality of LED Bars comprises: A substrate, used for carrying the plurality of LED dies; A wide-angle lens is disposed above the substrate to diffuse the lateral cross-sectional light emission angle of each LED Bar in the plurality of LED Bars, and the wide-angle lens enables the surface light source to be formed into a wide-angle surface light source; wherein the spacing between adjacent LED Bars in the plurality of LED Bars is the same as the equal spacing between the plurality of LED dies; and the wide-angle lens is formed integrally with the plurality of LED dies and the substrate when each LED Bar in the plurality of LED Bars is molded and packaged; The substrate has a contact surface in contact with the wide-angle lens and four side surfaces perpendicular to the contact surface. The wide-angle lens has a four-vertical surface structure, the four-vertical surface structures are respectively aligned with the four side surfaces of the corresponding substrate, and the four-vertical surface structures are perpendicular to the contact surface. The substrate does not contact the four-vertical-plane structure.

2. The LED device of surface light source according to claim 1, characterized in that: Each of the at least two LED Bar components is a long strip structure, and the long strip structure is a straight long strip structure.

3. The LED device of surface light source according to claim 1, characterized in that: The wide-angle lens of each LED Bar in the plurality of LED Bars has a double-arc upper surface structure, and the wide-angle lens is a straight strip structure.

4. The LED device of surface light source according to claim 2, characterized in that: The at least two LED Bar components are configured with multiple LED Bar components, and the multiple LED Bar components are arranged in a staggered manner on the supporting surface, wherein the staggered arrangement between the multiple linear long strip structure LED Bar components is staggered in the front, back, left and right to form a uniform surface light source.

5. The LED device of surface light source according to claim 2, characterized in that: The strip-shaped structure of each LED Bar component of the at least two LED Bar components is an arc-shaped strip-shaped structure, and the arc lengths of the LED Bar components of the multiple arc-shaped strip-shaped structures are paired in pairs and have different arc lengths. Then, according to the different arc length sizes, the paired LED Bar components with different arc lengths are arranged in sequence and arranged on the supporting surface in a symmetrical and staggered manner to form a uniform circular light source.

6. The LED device of surface light source according to claim 3, characterized in that: A high-reflection optical structure is provided on the double-arc upper surface structure of each wide-angle lens in the multiple LED Bars. The high-reflection optical structure is a long strip structure and covers the middle recessed part of the double-arc upper surface. The length of the high-reflection optical structure is the same as the length of the wide-angle lens, and the width of the high-reflection optical structure is less than or equal to the distance between the double vertices of the double arc.

7. The LED device of surface light source according to claim 1, characterized in that: The circuit board is a flexible circuit board or a soft circuit board, and all or part of the multiple LED Bars are shorter LED Bars composed of a smaller number of LED chips of the same type, so that the LED device of the wide-angle surface light source has flexibility.

8. The LED device of surface light source according to claim 1, characterized in that: The multiple LED dies of the same type in each LED Bar of the multiple LED Bars are all connected in series, so that the multiple LED dies of the same type in the multiple LED Bars can be lit up at the same time.

9. The LED device of surface light source according to claim 1, characterized in that: On the circuit board, each LED Bar among the plurality of LED Bars is connected to the power input via the independent connection circuit, so that each LED Bar among the plurality of LED Bars can be controlled by an external power source or signal source and lighted individually, presenting a dynamic lighting effect.

10. The LED device of surface light source according to claim 1, characterized in that: A fluorescent material is coated above each LED chip in the plurality of LED Bars and between the wide-angle lens.

11. The LED device of surface light source according to claim 1, characterized in that: Each of the plurality of LED Bars is electrically connected to at least one positive power input circuit and at least one negative power input circuit in the connection circuit; and each of the plurality of LED Bars itself also includes: A plurality of crystal regions and a plurality of electrode regions are provided on the front surface of the substrate, and a plurality of electrode regions are provided on the bottom surface of the substrate; The plurality of LED dies of the same type are closely arranged in a linear shape in the plurality of crystal regions respectively and correspondingly; The wide-angle lens covers the multiple LED chips and the substrate. The wide-angle lens is formed by a molding packaging process. The molding packaging process fills a resin into a mold cavity of a mold. The mold cavity of the mold is processed and formed according to the required size of the wide-angle lens. The substrate of the multiple LED chips is placed on the upper mold, and then the mold is closed and baked to complete the packaging, forming a wide-angle lens with a diffused light angle effect and completely covering the multiple LED chips. A connector is provided on the circuit board, and the connector is electrically connected to the positive power input circuit and the negative power input circuit in the connection circuit, respectively, to connect to an external input power supply.

12. The LED device of surface light source according to claim 1, characterized in that: The multiple LED Bars in the LED Bar assembly are composed of two types of LED Bars emitting light of different colors. All LED Bars emitting light of a first color are arranged in a line or an arc on the circuit board, and all LED Bars emitting light of a second color are arranged in another line or an arc on the circuit board. Moreover, all LED Bars emitting light of the first color and all LED Bars emitting light of the second color are parallel to each other or symmetrically arranged side by side on the circuit board.

13. The LED device of surface light source according to claim 1, characterized in that: It includes at least one LED driver IC, which is arranged on the circuit board. Each LED Bar in the multiple LED Bars is electrically connected to the LED driver IC via the connecting circuit on the circuit board, and the LED driver IC is electrically connected to the power input via the connecting circuit on the circuit board.

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