A long afterglow LED

Abstract

A long afterglow LED comprises an LED chip (1) and accessories, a bracket (2), a light distribution inner lens (3), and a long afterglow luminous lens body (4). The LED chip (1) and accessories, and the bracket (2) are encapsulated inside a transparent light distribution inner lens (3). The top of the light distribution inner lens (3) is an optical part having a light distribution and emission function. The long afterglow luminous lens body (4) is an optical structure luminous body formed by mixing long afterglow luminous powder and a light-transmitting mixed medium in proportion and forming by liquid solidification or molten solidification. The transparent light-guiding medium is surrounded or partially surrounded on the side wall of the light distribution inner lens (3) by liquid solidification or molten solidification or by a fitting structure to form an LED whole having LED light distribution and afterglow luminous functions. The LED can adjust the light energy distribution ratio and distribute the light to the emitted light field. While maintaining the afterglow luminous advantage, at least part of the LED luminous body can emit light according to the light path design.

Description

Technical Field

[0001] The invention relates to the field of light-emitting LEDs, and in particular to a long afterglow LED. Background Art

[0002] Long afterglow luminescent material, also known as luminous material, is a photoluminescent material: when excited by a light source, it emits visible light and stores part of the light energy obtained. After the excitation stops, the energy is slowly released in the form of light. Its luminous brightness is related to the performance of the luminescent material itself, as well as the thickness of the long afterglow luminescent layer and the concentration of the long afterglow luminescent powder therein. Due to the continuous development and progress of electroluminescent excitation long afterglow technology, the luminous brightness of long afterglow materials has been greatly improved. In recent years, it has gradually been paid attention to and applied to various lighting equipment fields. It has been welcomed by the market and consumers, forming industry and local standards, and has formed industrial development.

[0003] In this context, some people have developed long afterglow LEDs by combining long afterglow with LED chips. For example, patents CN101776213B, CN205723621, CN104170103A, and 206890416u use a covering method to apply a long afterglow coating on the LED lamp beads or fully cover the long afterglow lamp shell on the outer surface of the LED lamp beads, or patents 2007100302054, 2016205208975, and 2016205176048 use a long afterglow luminous encapsulation layer on the top of the LED lamp bead lens. Existing long afterglow LEDs are made using the above two methods. Although they can achieve the afterglow luminous effect after the lights are turned off, they have the following major defects:

[0004] 1. The existing long afterglow LED has a long afterglow set on the top or fully covered on the lamp bead. Since the LED is generally a Lambertian body, the closer to the main optical axis, the greater the luminous intensity. Therefore, most of the LED's emitted light is emitted from the top of the lamp bead. Due to the absorption and scattering of the long afterglow luminescent powder, the emitted light energy loss is too large when the LED emits light, especially making the LED beam angle too large, and the light distribution effect such as focusing and long-distance shooting cannot be achieved.

[0005] 2. The emitted light is a composite of LED light and long afterglow stimulated light, so there is a hue drift, which has a great impact on the original LED spectrum.

[0006] 3. Since the light intensity near the LED is very high, far exceeding the intensity required for saturation excitation of long afterglow materials, unnecessary waste of light energy is caused, making the overall luminous efficiency of the LED low, greatly affecting its performance.

[0007] 4. When using multi-chip LEDs or a single LED to emit multi-color light, the color light that is not within the long afterglow excitation spectrum is affected by the shading of the long afterglow luminous body, resulting in a waste of light energy.

[0008] In summary, the long afterglow LEDs in the prior art have the above-mentioned fatal defects and some other shortcomings, which restrict their development and become a difficult problem that needs to be solved urgently in the industry. Summary of the invention

[0009] In view of the above problems, the technical problem to be solved by the present invention is:

[0010] Invent a new type of long afterglow LED, making it

[0011] a. It has the function of LED light distribution and emission, especially the function of LED light distribution and emission, which can make at least part of the main light beam of the LED chip emit according to the light path design [facilitating the realization of parameters such as luminous angle, beam angle or light intensity distribution, such as focusing or divergence or deflection (the main light beam is emitted at an acute angle to the main axis of light emission) or polarization (sometimes called side light, the energy distribution of the emitted light on one side is greater than the energy distribution of the emitted light on the other side)], which can make the emitted light meet the needs of fixed-point (regional) projection or directional (angle) projection of the main light beam; the whole has a high-brightness long afterglow luminous effect.

[0012] b. While maintaining the afterglow of the long afterglow luminous body, the LED is made to emit in its original color (original luminous performance, luminous wavelength), reducing the light interference (chromaticity shift, etc.) caused by the long afterglow stimulated luminescence on the original luminous characteristics of the LED.

[0013] c. The light energy ratio of the emitted light part of the long afterglow LED and the excitation light part used to excite the long afterglow luminescence can be allocated according to the design requirements, and the light energy utilization rate is high, that is, the light close to the main axis of the light emission does not pass through the long afterglow luminous body for light distribution, and the luminous intensity is relatively large; the light far away from the main axis of the light emission has a relatively small luminous intensity and is used to excite the long afterglow luminous body; especially when multi-chip LEDs or single LED multi-color light is used for emitting light, the color light that is not within the long afterglow excitation spectrum range is not affected by the shading of the long afterglow luminous body; so that the overall light energy utilization rate of the LED is high and the luminous effect is good.

[0014] d. It can also bring many other advantages. For example, when long afterglow is realized, the afterglow brightening effect of superimposing the light mainly in the adjacent parts of the long afterglow (generally in the enclosed area of ​​the long afterglow light-emitting lens body) plays a brightening role; it has higher light energy utilization rate, better versatility, more superior luminous performance, higher integration and standardization, high convenience, wider applicability, especially conducive to long-range shooting, especially suitable for security purposes such as warning and indication.

[0015] The design concept of the present invention can be understood as follows: since the LED illuminant is a Lambertian body (such asFigure 4 As shown in the figure, the closer to the main axis of light emission, the greater the light intensity, and the farther away from the main axis of light emission, the smaller the light intensity; Figure 5 As shown in the figure, the position close to the main axis of light emission (such as the top position) is the LED light transmission emission position, and the LED emits light in its original color (original light-emitting performance, light-emitting wavelength), with high light brightness and long emission distance, while the position far away from the main axis of light emission (side position) is the long afterglow position, and when the LED emits light, the long afterglow luminous body is stimulated to emit light through relatively weak light intensity, and the LED emits light through afterglow after it is turned off, so that the LED has a long afterglow luminous function; if the emphasis is on the LED emission effect, the solid angle proportion or area proportion of the long afterglow luminous body should be reduced to appropriately reduce the luminous area of ​​the long afterglow luminous body, and if the emphasis is on the long afterglow luminous effect, the solid angle proportion or area proportion of the long afterglow luminous body should be increased to increase the luminous area of ​​the long afterglow luminous body.

[0016] The technical solution of the present invention is: a long afterglow LED, such as Figure 1-3 As shown, it comprises an LED chip (1) and accessories, a bracket (2), and a light distribution inner lens (3), wherein the light distribution inner lens (3) is a transparent optical lens, and the bracket (2) comprises an anode frame and a cathode frame, and the LED chip (1) and accessories are arranged on the anode frame or the cathode frame [generally, a reflective bowl (having a reflective focusing function) is arranged on the top of the anode frame or the cathode frame, and the LED chip (1) is fixed in the reflective bowl of the bracket (2) by means of insulating glue, etc.], and the above structure is encapsulated inside the transparent light distribution inner lens (3), wherein the electrode pins at the bottom of the anode frame and the cathode frame respectively extend outside the transparent light distribution inner lens (3) (when multiple chips are used, they can share a cathode or anode),

[0017] The top of the light distribution inner lens (3) is an optical part with a light distribution output function. The outer periphery of the light distribution inner lens (3) is also combined with a long afterglow luminous lens body (4) (generally formed by using a mold to drip glue or injection molding for curing). The long afterglow luminous lens body (4) is an optical structure luminous molded body formed by mixing long afterglow luminous powder and a light-transmitting mixed medium in proportion and curing in a liquid state or a molten state. The long afterglow luminous lens body (4) is surrounded or partially surrounded on the side wall of the light distribution inner lens (3) by a transparent light-guiding medium in a liquid curing manner (preferably using a secondary drip glue process) or a molten state curing manner or by a fitting structure to form an LED whole with LED light distribution output and afterglow luminous functions;

[0018] When the LED chip (1) emits light, Figure 1As shown, part of the light close to the main axis of light emission maintains its original light emission spectrum and is emitted according to the required emission light field distribution requirements. When the top of the light-distributing inner lens (3) is a focusing head, part of the light close to the main axis of light emission maintains its original light emission spectrum and is emitted in the direction of the focusing head. At the same time, part of the light far from the main axis of light emission is emitted to the long afterglow light emission lens (4) and is stimulated to emit light. Since the brightness of the long afterglow stimulated light is much lower than the brightness of the LED emitted light in the direction of the main axis of light emission, a good afterglow light emission effect is mainly achieved in the direction perpendicular to the main axis of light emission.

[0019] When the LED chip (1) is turned off, Figure 6 As shown, the long afterglow luminous lens (4) maintains afterglow luminescence in the form of brightness attenuation and mainly produces an afterglow brightening effect of superimposed luminescence in its adjacent parts (generally in the enclosed area of ​​the long afterglow luminous lens).

[0020] Furthermore, a long afterglow luminous lens body (4) is arranged around the outer side of the light distribution inner lens (3), and a transparent outer lens (5) (which can be formed in stages) is also arranged on the outer side of the long afterglow luminous lens body (4) to protect the LED and guide light.

[0021] Furthermore, the optical part at the top of the light distribution inner lens (3) is a focusing optical structure (also called a focusing head), thereby forming a long afterglow LED having the focusing function of the LED emitted light along the main axis of the light emission and the afterglow light emission function. (The side or bottom surface of the long afterglow light emitting lens body passes through the light distribution inner lens (3) and upward through the focusing optical structure (focusing head) to focus the light)

[0022] Furthermore, the optical portion at the top of the light distribution inner lens (3) is a light diverging optical structure, thereby forming a long afterglow LED having the function of diverging the LED emitted light along the main axis of the light emission and the afterglow light emission function.

[0023] Furthermore, the optical part at the top of the light distribution inner lens (3) is a deflection optical structure, thereby forming a long afterglow LED having a deflection function in which the LED output light is at a certain angle to the main axis direction of the light emission and an afterglow light emission function.

[0024] Furthermore, the optical part at the top of the light distribution inner lens (3) is a polarized optical structure, thereby forming a long afterglow LED having the function of mainly emitting polarized light along one side of the LED output light and the afterglow emitting function.

[0025] Furthermore, the long afterglow luminous lens body (4) is a surrounding structure [such as Fig.11 As shown, the side of the light distribution inner lens (3) is completely surrounded by the long afterglow luminous lens body (4), and the outer contour of the long afterglow luminous lens body (4) is circular when viewed from above (as shown in FIG. Fig.14 As shown), ellipse, polygon (as Fig.15 As shown in square or Fig.16Hexagonal as shown) or a combination of the above shapes.

[0026] Furthermore, the long afterglow luminescent lens (4) is a SrAl2O4 type long afterglow luminescent powder or Sr4Al 14 O 25 A solidified product of a mixture of yellow-green or blue-green aluminate-type long afterglow luminescent powder represented by a long afterglow luminescent powder, or a red or near-red long afterglow luminescent powder represented by a sulfide or nitride and a liquid or molten light-transmitting mixed medium, or the particle size of the long afterglow luminescent powder of the long afterglow luminescent lens (4) is between 1 μm and 200 μm (the between in this article includes both ends), or the proportion of the long afterglow luminescent powder in the long afterglow luminescent lens (4) is between 20% and 60%, or the thickness of the long afterglow luminescent lens (4) is between 1.5 mm and 10 mm.

[0027] Furthermore, the light distribution inner lens (3) is made of epoxy resin, PC, acrylic, PMMA, PS or glass.

[0028] Furthermore, the bottom (or bottom surface) of the long afterglow light-emitting lens body (4) is a ring (preferably a ring) with a perforated cavity or groove (for plug-in perforation) in the middle part, and an upright long afterglow conjoined bracket is provided on the ring, with a single side and two opposite sides (such as Fig.12 as shown) or radially from above (as shown Fig.13 The light distribution inner lens (3) is combined on the side wall of the light distribution inner lens (3) in the manner shown in the figure [the side of the light distribution inner lens (3) is partially surrounded by the long afterglow luminous lens body (4)].

[0029] Furthermore, the long afterglow light-emitting lens (4) is a symmetrical structure or an asymmetrical structure centered on the LED light-emitting center (the location of the LED chip).

[0030] Further, if Fig.12 , 13 As shown, the arrangement surface where the electrode pins of the bracket (2) are located passes through the luminous center of the light distribution inner lens (3), and the long afterglow luminous lens body (4) is arranged on one side or both sides of the above arrangement surface, which is beneficial to spatial layout, production and manufacturing, and improves the luminous effect and angle flipping during later use.

[0031] Furthermore, the vertical excitation angle (θ1) of the long afterglow light-emitting lens (4) in the central vertical section of the LED chip (1) along the light distribution inner lens (3) is between 0° and 75°, or the horizontal excitation angle (θ2) of the long afterglow light-emitting lens (4) in the bottom surface of the LED chip (1) along the light distribution inner lens (3) is between 90° and 180° (facilitating light energy distribution).

[0032] Furthermore, at least a portion of the long afterglow light-emitting lens (4) is located at a height not lower than the height of the lowest position where the LED chip (1) emits light. Preferably, the height of the bottom of the long afterglow light-emitting lens (4) is not lower than the height of the lowest position where the LED chip (1) emits light.

[0033] Furthermore, a transparent light-conducting mixed medium (silicone or epoxy resin) mixed with one or more LED phosphors is filled above the LED chip (1) in the reflective cup, which is conducive to light conversion, such as converting blue light into white light by adding YAG yellow powder.

[0034] Furthermore, two or more LED chips (1) are arranged in the reflective cup of the support (2), and at least one LED chip is not on the long afterglow excitation spectrum, and at least one LED chip is on the long afterglow excitation spectrum, and the LED chips are arranged with a common cathode or a common anode (such as Fig. 9 ), or separately set the cathode and anode (as shown Fig.10 to achieve a multi-color luminous effect.

[0035] Furthermore, the LED chip (1) is two or more chips (UV+LED chip) including at least an ultraviolet chip and a conventional visible light chip, which can both stimulate long afterglow and have conventional light-emitting purposes.

[0036] Furthermore, the light distribution inner lens (3) is circular or polygonal in top view, and the long afterglow luminous lens body (4) surrounds the outer side of the light distribution inner lens (3); or the combined structure of the light distribution inner lens (3) and the long afterglow luminous lens body (4) is circular or polygonal in top view.

[0037] Furthermore, the top of the light-distributing inner lens (3) is raised as a whole, and its top surface is a light-collecting free-form surface.

[0038] Furthermore, the top of the light-distributing inner lens (3) is raised as a whole, and the center of the top surface is recessed downwards.

[0039] Furthermore, the top surface of the top of the light-distributing inner lens (3) is an inclined surface with a certain inclination angle or a free-form surface with a certain inclination angle and a convex central portion.

[0040] Furthermore, the long afterglow luminous lens (4) is arranged on the side opposite to the polarized light emission side.

[0041] LED chip (1):

[0042] The LED chip (1) includes at least one LED chip on the long afterglow excitation spectrum, and may also include two or more LED chips, and at least one of the LED chips is not on the long afterglow excitation spectrum. The LED chips are arranged with a common cathode or a common anode, or with a cathode and an anode arranged separately.

[0043] Bracket (2):

[0044] The bracket (2) comprises an anode frame and a cathode frame, and an LED chip (1) is arranged on the anode frame or the cathode frame [generally, a reflective bowl (having a reflective focusing function) is arranged on the top of the anode frame or the cathode frame, and the LED chip (1) is fixed in the reflective bowl of the bracket (2) by means of insulating glue or the like]. The above structure is encapsulated in the interior of a transparent light distribution inner lens (3), wherein the electrode pins at the bottom of the anode frame and the cathode frame respectively extend outside the transparent light distribution inner lens (3) (when multiple chips are present, they can share a cathode or anode).

[0045] Optical inner lens (3):

[0046] The light distribution inner lens (3) is made of transparent material, such as transparent PC, PMMA or transparent epoxy resin, and is formed by injection molding, casting and other molding processes. It mainly plays the role of light transmission, light distribution, protection, support, covering, containing, fixing, circuit connection, installation and the like. It can distribute the light energy proportion of the output light part of the LED light emitting body and the excitation light part used to excite the long afterglow light according to the design requirements, and has the function of LED light distribution.

[0047] Long afterglow luminous lens (4):

[0048] The long afterglow luminescent lens (4) is a long afterglow luminescent powder (generally SrAl2O4 type long afterglow luminescent powder or Sr4Al 14 O 25 A yellow-green or blue-green aluminate type long afterglow luminescent powder represented by a type long afterglow luminescent powder, or a red or near-red long afterglow luminescent powder represented by a sulfide or nitride) is mixed with a light-transmitting mixed medium (such as a transparent epoxy glue) in proportion and formed by liquid solidification or molten solidification to form an annular surrounding structure or a side surrounding structure with an annular bottom. The transparent light-guiding medium is solidified in a liquid state or in a molten state or is combined by a fitting structure, and is surrounded or partially surrounded on the side wall of the light distribution inner lens (3) in a manner parallel to or perpendicular to the bottom surface of the LED.

[0049] The main advantages of the long afterglow LED of the present invention are:

[0050] The invention can allocate the light energy proportion of the emitted light part of the long afterglow LED and the excitation light part for exciting the long afterglow luminescence according to the design requirements, has a high light energy utilization rate, has both the LED light distribution and emission function, and has a high-brightness long afterglow luminous effect as a whole. While maintaining the afterglow luminescence of the long afterglow luminous body, the LED is made to emit in the original color (original luminous performance, luminous wavelength) in the direction of the luminous main axis, so as to achieve the purpose of directional light projection, and reduce the light interference (chromaticity shift, etc.) caused by the long afterglow luminescence to the LED luminescence when stimulated, and has good luminous effect (LED luminous effect and long afterglow luminous effect) or light distribution and emission effect. In particular, it can also bring many other advantages, such as realizing the afterglow brightening effect of superimposing the luminescence of the adjacent parts of the long afterglow when the long afterglow luminescence is realized, which plays a brightening role; in particular, when a multi-chip LED or a single LED emits multi-color light, the color light that is not within the long afterglow excitation spectrum range is not affected by the shading of the long afterglow luminous body; it has a higher light energy utilization rate, better versatility, more superior luminous performance, higher integration and standardization, high convenience and wider applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A1-A1 cross-sectional structure and light distribution diagram of a long afterglow LED with a focusing optical structure;

[0052] Figure 2 It is a three-dimensional perspective structural diagram of a long afterglow LED with a focusing optical structure;

[0053] Figure 3 A2-A2 cross-sectional structural schematic diagram of a long afterglow LED with a focusing optical structure;

[0054] Figure 4 This is a schematic diagram of LED light energy distribution;

[0055] Figure 5 A schematic diagram of LED light energy distribution of a long afterglow LED with a focusing optical structure;

[0056] Figure 6 A schematic diagram of afterglow emission of a long afterglow LED with a focusing optical structure;

[0057] Figure 7 It is a schematic diagram of the cross-sectional structure of a long afterglow LED with a focusing optical structure;

[0058] Figure 8 It is a schematic diagram of the cross-sectional structure of a long afterglow LED with a focusing optical structure;

[0059] Fig. 9 It is a schematic cross-sectional structure diagram of a long afterglow LED with a focusing optical structure and multiple chips with cathode and anode pins independently arranged;

[0060] Fig.10 It is a schematic cross-sectional structure diagram of a long afterglow LED with a focusing optical structure and multiple chips with common cathode and common anode pins;

[0061] Fig.11 It is a schematic diagram of a top view of a fully enclosed long afterglow LED with a focusing optical structure;

[0062] Fig.12 It is a top view structural diagram of a two-petal long afterglow LED with a focusing optical structure;

[0063] Fig.13 It is a schematic diagram of a top view of a plum blossom-shaped long afterglow LED with a focusing optical structure;

[0064] Fig.14 A schematic diagram of a top-view structure of a circular long afterglow LED with a focusing optical structure;

[0065] Fig.15 A schematic diagram of a top-view structure of a rectangular long afterglow LED with a focusing optical structure;

[0066] Fig.16 A schematic diagram of a top-view structure of a long afterglow LED with a focusing optical structure and a hexagonal top view;

[0067] Fig.17 This is a schematic diagram of a three-dimensional perspective structure of a long afterglow LED with a focusing optical structure according to the first embodiment;

[0068] Fig.18 The A3-A3 cross-sectional structure and light distribution diagram of a long afterglow LED with a focusing optical structure according to the first embodiment;

[0069] Fig.19 The A4-A4 cross-sectional structure diagram of a long afterglow LED with a focusing optical structure according to the first embodiment;

[0070] Fig. 20 A schematic diagram of afterglow emission of a long afterglow LED with a focusing optical structure according to the first embodiment;

[0071] Fig.21 A cross-sectional structure and light distribution diagram of a long afterglow LED with a light diverging optical structure according to the second embodiment;

[0072] Fig. 22 The cross-sectional structure and light distribution diagram of a long afterglow LED with a deflection optical structure according to the third embodiment;

[0073] Fig.23The cross-sectional structure and light distribution diagram of a long afterglow LED with a polarized optical structure according to the fourth embodiment;

[0074] Fig.24 This is a schematic diagram of a top view of a long afterglow LED with a polarized optical structure according to the fourth embodiment. DETAILED DESCRIPTION

[0075] Based on the spirit of the present invention, the embodiments of this article only cite straw hat lamp beads as a typical case, but are not limited to the embodiments of this article. The embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0076] Embodiment 1

[0077] A long afterglow LED with a focusing optical structure, such as Figure 17-20 As shown, it comprises: an LED chip (110) and accessories, a bracket (120), a light distribution inner lens (130), and a long afterglow light-emitting lens body (140). The light distribution inner lens (130) is a transparent optical lens formed by curing a two-component transparent epoxy resin through a process such as casting, and is cylindrical in shape as a whole, with a spherical segment-shaped focusing structure at the top. The bracket (120) is a wedge-shaped bracket, comprising an anode rod and a cathode rod with an emission bowl at the top, and an electrode pin at the bottom. The LED chip (110) is fixed in the reflective cup of the bracket (120) by insulating glue, and then connected to the electrode pin by a crystal wire (or accessories). The bracket (120) is inserted into the inside of the two-component transparent epoxy resin of the light distribution inner lens (130) while it is not cured until it is cured.

[0078] Two or more LED chips can also be used, and when at least one of them is not on the long afterglow excitation spectrum and at least one is on the long afterglow excitation spectrum, each LED chip can be set with a common cathode or a common anode, or the cathode and anode can be set separately. [There will be no obstruction when multiple spectra are used. ]

[0079] Then, the encapsulated light distribution inner lens (130) is invertedly inserted into a mold containing a mixed slurry of long afterglow luminescent powder and transparent epoxy resin, and then secondary cured and molded, and then demolded;

[0080] Alternatively, the long afterglow luminescent powder and the transparent acrylic resin are molded by injection molding through an injection molding process, and may be an annular (cylindrical) surrounding structure, which is combined with the side periphery of the light distribution inner lens (130) through a fitting structure and a transparent light-guiding adhesive [360 degrees surrounding the light distribution inner lens (130) when viewed from above], or a side periphery or a bracket with a surrounding ring at the bottom, such as two opposite surrounding shells with a surrounding ring at the bottom, which are embedded from top to bottom or from bottom to top on the light distribution inner lens (130) through a fitting structure, and a liquid transparent light-guiding medium (130) is used in a dipping or dripping manner at the joint of the two, and the transparent light-guiding medium (130) is solidified and combined into an integral structure.

[0081] Furthermore, the outer surface of the light-distributing inner lens (130) or the long afterglow luminous lens body (140) may be dipped in transparent glue and cured to form a light-transmitting protective layer.

[0082] like Fig.18 As shown, when the long afterglow LED is powered on, part of the light emitted by the LED chip (110) is concentrated and emitted from the top of the LED along the main axis of light emission with the original spectral characteristics, and part of the light deviates from the main axis of light emission and is emitted toward the side of the LED to the long afterglow light-emitting lens (140) to be stimulated to emit light. The LED chip (110) can emit blue light or UV short-wave light, so as to be conducive to the stimulation of long afterglow represented by alkaline earth aluminate. At this time, corresponding fluorescent powder can be arranged in the reflective cup bowl, and the light emitted by the LED chip (110) and the stimulated light emission of the fluorescent powder are mixed to form white light, which is conducive to use in the field of lighting. RGB multi-chips can also be used, in which the short-wave chip is used to stimulate the long afterglow, and the overall mixed light emits white light.

[0083] like Fig. 20 As shown, when the power is off, the long afterglow luminous lens body (140) emits afterglow light outwards, and part of the light can be reflected or refracted inside the light distribution inner lens (130) to achieve superimposed luminescence, thereby achieving an afterglow brightening effect.

[0084] The long afterglow LED of the present invention has a high light energy utilization rate. While maintaining the afterglow of the long afterglow luminous body, the LED is made to emit in the original color (original luminous performance, luminous wavelength) in the direction of the main axis of the luminescence, thereby achieving the purpose of directional lighting, and reducing the light interference (chromaticity shift, etc.) caused by the long afterglow to the LED luminescence when it is stimulated to emit light. The whole has a high-brightness long afterglow luminous effect, and can be used alone as a point light source, or as a luminous element combined with other luminous components to make various luminous equipment, which has a wide range of applications.

[0085] Embodiment 2

[0086] A long afterglow LED with a light diverging optical structure, such as Fig.21As shown, it includes: an LED chip (210) and accessories, a bracket (220), a light distribution inner lens (230), and a long afterglow light emitting lens body (240). The light distribution inner lens (230) is a transparent optical lens formed by curing a two-component transparent epoxy resin through a pouring process, and is cylindrical in shape as a whole. The top of the light distribution inner lens bulges upward as a whole, and the center of the top is concave to form a light diverging structure. The bracket (220) is a wedge-shaped bracket, including an anode rod and a cathode rod with an emission bowl on the top, and the lower part is an electrode pin. The LED chip (210) is fixed in the reflective cup bowl of the bracket (220) by insulating glue, and then connected to the electrode pin by a crystal wire (or accessories). The bracket (220) is inserted into the light distribution inner lens (230) when the two-component transparent epoxy resin is not cured until it is cured.

[0087] Then, the packaged light distribution inner lens (230) is invertedly inserted into a mold containing a mixed slurry of long afterglow luminescent powder and transparent epoxy resin, and then secondary cured and molded, and then demolded;

[0088] Alternatively, the long afterglow luminescent powder and the transparent acrylic resin are molded by injection molding through an injection molding process, and may be an annular (cylindrical) surrounding structure, which is combined with the side periphery of the light distribution inner lens (230) through a fitting structure and a transparent light-guiding adhesive [360 degrees surrounding the light distribution inner lens (230) when viewed from above], or a side periphery or a bracket with a surrounding ring at the bottom, such as two opposite surrounding shells with a surrounding ring at the bottom, which are embedded from top to bottom or from bottom to top on the light distribution inner lens (230) through a fitting structure and are solidified and combined into an integral structure by dipping or dripping a liquid transparent light-guiding medium (230).

[0089] Furthermore, the outer surface of the light-distributing inner lens (230) or the long afterglow light-emitting lens body (240) may be dipped in transparent glue and cured to form a light-transmitting protective layer.

[0090] like Fig.21 As shown, when the long afterglow LED is powered on, part of the light emitted by the LED chip (210) is concentrated and emitted from the top of the LED along the main axis of light emission with the original spectral characteristics, and part of the light deviates from the main axis of light emission and is emitted toward the side of the LED to the long afterglow light-emitting lens (240) to be stimulated to emit light, wherein the LED chip (210) can emit blue light or UV short wave, so as to be conducive to the stimulation of long afterglow represented by alkaline earth aluminate. At this time, corresponding fluorescent powder can be arranged in the reflective cup bowl, and the light emitted by the LED chip (210) and the stimulated light emission of the fluorescent powder are mixed to form white light, which is conducive to use in the fields of lighting. RGB multi-chips can also be used, in which the short-wave chip is used to stimulate the long afterglow, and the overall mixed light emits white light.

[0091] When the power is off, the long afterglow luminous lens body (240) emits afterglow light outwards, and part of the light can be reflected or refracted inside the light distribution inner lens (230) to achieve superimposed luminescence, thereby achieving an afterglow brightening effect.

[0092] The long afterglow LED of the present invention has a high light energy utilization rate. While maintaining the afterglow of the long afterglow luminous body, the LED is made to emit in its original color (original luminous performance, luminous wavelength) in the direction of the main axis of the luminescence, thereby achieving the purpose of directional light projection and reducing the light interference (chromaticity shift, etc.) caused by the long afterglow to the LED luminescence when it is stimulated to emit light. The whole has a high-brightness long afterglow luminous effect, and can be used alone as a point light source, or as a luminous element combined with other luminous components to make various luminous equipment, with a wide range of applications.

[0093] Embodiment 3

[0094] A long afterglow LED with a deflection optical structure, such as Fig. 22 As shown, it includes: an LED chip (310) and accessories, a bracket (320), a light distribution inner lens (330), and a long afterglow light-emitting lens body (340). The light distribution inner lens (330) is a transparent optical lens formed by curing a two-component transparent epoxy resin through a process such as casting, and is cylindrical in shape as a whole, and its top is an inclined surface with a certain inclination angle to form a deflection optical structure. The bracket (320) is a wedge-shaped bracket, including an anode rod and a cathode rod with an emission bowl on the top, and its lower part is an electrode pin. The LED chip (310) is fixed in the reflective cup bowl of the bracket (320) through an insulating glue, and then connected to the electrode pin through a crystal wire (or an accessory). The bracket (320) is inserted into the light distribution inner lens (330) when the two-component transparent epoxy resin is not cured until it is cured.

[0095] Then, the encapsulated light distribution inner lens (330) is invertedly inserted into a mold containing a mixed slurry of long afterglow luminescent powder and transparent epoxy resin, and then secondary cured and molded, and then demolded;

[0096] Alternatively, the long afterglow luminescent powder and the transparent acrylic resin are molded by injection molding through an injection molding process, and may be an annular (cylindrical) surrounding structure, which is combined with the side periphery of the light distribution inner lens (330) through a fitting structure and a transparent light-guiding adhesive (360 degrees fully surrounding the four sides of the light distribution inner lens (330) when viewed from above), or a side enclosure or a bracket with an enclosure at the bottom, such as two opposite petals of a surrounding shell with an enclosure at the bottom, which are embedded from top to bottom or from bottom to top on the light distribution inner lens (330) through a fitting structure and are solidified and combined into an integral structure by dipping or dripping with a liquid transparent light-guiding medium (330), at which time, the direction of the two petals is consistent with the inclination direction of the top surface of the light distribution inner lens (330).

[0097] Furthermore, the outer surface of the light-distributing inner lens (330) or the long afterglow light-emitting lens body (340) may be dipped in transparent glue and cured to form a light-transmitting protective layer.

[0098] like Fig. 22 As shown, when the long afterglow LED is powered on, part of the light emitted by the LED chip (310) is concentrated and emitted from the top of the LED along the main axis of light emission with the original spectral characteristics, and part of the light deviates from the main axis of light emission and is emitted toward the side of the LED to the long afterglow light-emitting lens (340) to be stimulated to emit light, wherein the LED chip (310) can emit blue light or UV short wave, so as to be conducive to the stimulation of long afterglow represented by alkaline earth aluminate. At this time, corresponding fluorescent powder can be arranged in the reflective cup bowl, and the light emitted by the LED chip (310) and the stimulated light emission of the fluorescent powder are mixed to form white light, which is conducive to use in the fields of lighting; RGB multi-chips can also be used, in which the short-wave chip is used to stimulate the long afterglow, and the overall mixed light emits white light.

[0099] When the power is off, the long afterglow luminous lens body (340) emits afterglow light outwards, and part of the light can be reflected or refracted inside the light distribution inner lens (330) to achieve superimposed luminescence, thereby achieving an afterglow brightening effect.

[0100] The long afterglow LED of the present invention has a high light energy utilization rate. While maintaining the afterglow emission of the long afterglow luminous body, the LED is deflected at a certain acute angle to the main axis of the emission in its original color (original luminous performance and luminous wavelength), thereby achieving the purpose of directional light projection and reducing the light interference (chromaticity shift, etc.) caused by the long afterglow to the LED emission when it is stimulated to emit light. The whole has a high-brightness long afterglow luminous effect, and can be used alone as a point light source, or as a luminous element combined with other luminous components to make various luminous equipment, with a wide range of applications.

[0101] Embodiment 4

[0102] A long afterglow LED with a polarized optical structure, such as Fig.23 , 24 As shown, it includes: an LED chip (410) and accessories, a bracket (420), a light distribution inner lens (430), and a long afterglow light-emitting lens body (440). The light distribution inner lens (430) is a transparent optical lens formed by curing a two-component transparent epoxy resin through a casting process, and is cylindrical in shape as a whole. One side of its top is a polarized optical structure that focuses light laterally toward that side. The bracket (420) is a wedge-shaped bracket, including an anode rod and a cathode rod with an emission bowl on the top, and an electrode pin at the bottom. The LED chip (410) is fixed in the reflective cup of the bracket (420) through an insulating glue, and then connected to the electrode pin through a crystal wire (or an accessory). The bracket (420) is inserted into the light distribution inner lens (430) when the two-component transparent epoxy resin is not cured until it is cured.

[0103] Then, the encapsulated light distribution inner lens (430) is invertedly inserted into a mold containing a mixed slurry of long afterglow luminescent powder and transparent epoxy resin, and then secondary cured and molded, and then demolded;

[0104] Alternatively, the long afterglow luminescent powder and the transparent acrylic resin are injection molded by an injection molding process, and may be a side enclosure or a bracket with a ring at the bottom, such as a single-petal enclosure shell with a ring at the bottom, which is embedded from top to bottom or from bottom to top on the light distribution inner lens (430) through a fitting structure and is solidified and combined into an integral structure by dipping or dripping a liquid transparent light-guiding medium (430), and the single-petal enclosure shell is arranged opposite to the side focusing lens.

[0105] Furthermore, the outer surface of the light-distributing inner lens (430) or the long afterglow light-emitting lens body (440) may be dipped in transparent glue and cured to form a light-transmitting protective layer.

[0106] like Fig.23 As shown, when the long afterglow LED is powered on, part of the light emitted by the LED chip (410) is concentrated and emitted from the top of the LED along the main axis of light emission with the original spectral characteristics, and part of the light deviates from the main axis of light emission and is emitted toward the side of the LED to the long afterglow light-emitting lens (440) to be stimulated to emit light. The LED chip (410) can emit blue light or UV short wave, so as to be conducive to the stimulation of long afterglow represented by alkaline earth aluminate. At this time, corresponding fluorescent powder can be arranged in the reflective cup bowl, and the light emitted by the LED chip (410) and the stimulated light emission of the fluorescent powder are mixed to form white light, which is conducive to use in the fields of lighting. RGB multi-chips can also be used, in which the short-wave chip is used to stimulate the long afterglow, and the overall mixed light emits white light.

[0107] When the power is off, the long afterglow luminous lens body (440) emits afterglow light outwards, and part of the light can be reflected or refracted inside the light distribution inner lens (430) to achieve superimposed luminescence, thereby achieving an afterglow brightening effect.

[0108] The long afterglow LED of the present invention has a high light energy utilization rate. While maintaining the afterglow light emission of the long afterglow light emitting body, the LED is made to emit in its original color (original light-emitting performance, light-emitting wavelength) along the opposite side of the long afterglow light-emitting lens body, thereby achieving the purpose of directional light projection and reducing the light interference (chromaticity shift, etc.) caused by the long afterglow light being stimulated to emit light to the LED light. The whole has a high-brightness long afterglow light emission effect, and can be used alone as a point light source, or as a light-emitting component combined with other light-emitting components to make various light-emitting equipment, with a wide range of applications.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, variations, combinations, superpositions, equivalent substitutions, etc. made within the spirit and principles of the present invention, or the application of this technology to related and similar technical fields, should be included in the protection scope of the present invention.

Claims

1. A long afterglow LED, comprising an LED chip (1) and accessories, a bracket (2), and a light distribution inner lens (3), wherein the light distribution inner lens (3) is a transparent optical lens, the bracket (2) comprises an anode frame and a cathode frame, the LED chip (1) and accessories are arranged on the anode frame or the cathode frame, the LED chip (1) and accessories, and the bracket (2) are encapsulated inside the transparent light distribution inner lens (3), wherein: The electrode pins at the lower part of the anode frame and the cathode frame extend to the outside of the transparent light distribution inner lens (3), respectively, and are characterized in that: the outer periphery of the light distribution inner lens (3) is also combined with a long afterglow luminous lens body (4), and the long afterglow luminous lens body (4) is an optical structure luminous molding body in which long afterglow luminous powder and a light-transmitting mixed medium are mixed in proportion and formed by liquid solidification or molten solidification. The long afterglow luminous lens body (4) is surrounded or partially surrounded on the side wall of the light distribution inner lens (3) by a transparent light-guiding medium in a liquid solidification manner or a molten solidification manner or by a fitting structure, and the top of the light distribution inner lens (3) is an optical part with a light distribution emitting function, thereby forming an LED whole with LED light distribution emitting and afterglow luminous functions.

2. The long afterglow LED according to claim 1, characterized in that: A transparent outer lens (5) is also provided on the outer side of the long afterglow luminous lens body (4).

3. The long afterglow LED according to claim 1, characterized in that: The optical part at the top of the light-distributing inner lens (3) is a focusing optical structure.

4. The long afterglow LED according to claim 1, characterized in that: The optical part at the top of the light-distributing inner lens (3) is a light-diverging optical structure.

5. The long afterglow LED according to claim 1, characterized in that: The optical part at the top of the light-distributing inner lens (3) is a deflection optical structure.

6. The long afterglow LED according to claim 1, characterized in that: The optical part at the top of the light-distributing inner lens (3) is a polarized optical structure.

7. The long afterglow LED according to claim 1, characterized in that: The long afterglow luminescent lens (4) is a SrAl2O4 type long afterglow luminescent powder or Sr4Al 14 O 25 A mixed solidified product of yellow-green or blue-green aluminate type long afterglow luminescent powder represented by a type long afterglow luminescent powder, or red or near-red long afterglow luminescent powder represented by a sulfide or nitride and a liquid or molten light-transmitting mixed medium, or the particle size of the long afterglow luminescent powder of the long afterglow luminescent lens (4) is between 1μm and 200μm, or the proportion of the long afterglow luminescent powder in the long afterglow luminescent lens (4) is between 20% and 60%, or the thickness of the long afterglow luminescent lens (4) is between 1.5mm and 10mm.

8. The long afterglow LED according to claim 1, characterized in that: The light-distributing inner lens (3) is made of epoxy resin, PC, acrylic, PMMA or PS.

9. The long afterglow LED according to claim 1, characterized in that: The long afterglow luminous lens body (4) is a surrounding structure, and the outer contour of the long afterglow luminous lens body (4) is circular, elliptical, polygonal or a combination of the above shapes when viewed from above.

10. The long afterglow LED according to claim 1, characterized in that: The bottom of the long afterglow luminous lens body (4) is a circle with a perforated cavity or groove in the middle part, and an upright long afterglow integrated bracket is arranged on the circle, which is arranged on the side wall of the light distribution inner lens (3) in a single side, two opposite sides or radially in a top view.

11. The long afterglow LED according to claim 1, characterized in that: The long afterglow luminous lens (4) is a symmetrical structure or an asymmetrical structure centered on the luminous center.

12. The long afterglow LED according to claim 1, characterized in that: The arrangement surface where the electrode pins of the bracket (2) are located passes through the luminous center of the light distribution inner lens (3), and the long afterglow luminous lens body (4) is arranged on one side or both sides of the arrangement surface.

13. The long afterglow LED according to claim 1, characterized in that: The vertical excitation angle (θ1) of the long afterglow light-emitting lens (4) on the central vertical section of the LED chip (1) along the light distribution inner lens (3) is between 0° and 75°, or the horizontal excitation angle (θ2) of the long afterglow light-emitting lens (4) on the bottom surface of the LED chip (1) along the light distribution inner lens (3) is between 90° and 180°.

14. The long afterglow LED according to claim 1, characterized in that: At least a portion of the long afterglow light-emitting lens (4) is located at a height not lower than the height of the lowest position where the LED chip (1) emits light, or the bottom of the long afterglow light-emitting lens (4) is located at a height not lower than the height of the lowest position where the LED chip (1) emits light.

15. The long afterglow LED according to claim 1, characterized in that: A reflective cup is provided on the top of the anode frame or the cathode frame of the support (2); the LED chip (1) is fixed in the reflective cup of the support (2) by means of insulating glue; and a transparent light-guiding mixed medium mixed with one or more LED fluorescent powders is filled above the LED chip (1) in the reflective cup.

16. The long afterglow LED according to claim 1, characterized in that: A reflective cup is provided at the top of the anode frame or the cathode frame of the support (2); the LED chip (1) is fixed in the reflective cup of the support (2) by means of insulating glue; two or more LED chips (1) are provided in the reflective cup of the support (2), and at least one of the LED chips is not on the long afterglow excitation spectrum and at least one of the LED chips is on the long afterglow excitation spectrum; each of the LED chips (1) is arranged with a common cathode or a common anode, or the cathode and anode are arranged separately.

17. The long afterglow LED according to claim 1, characterized in that: The LED chip (1) contains at least one ultraviolet chip and one visible light chip.

18. The long afterglow LED according to claim 1, characterized in that: The light distribution inner lens (3) is circular or polygonal in top view, and the long afterglow luminous lens body (4) surrounds the outer side of the light distribution inner lens (3); or the combined structure of the light distribution inner lens (3) and the long afterglow luminous lens body (4) is circular or polygonal in top view.

19. The long afterglow LED according to claim 3, characterized in that: The top of the light-distributing inner lens (3) bulges upward as a whole, and its top surface is a light-collecting free-form curved surface.

20. The long afterglow LED according to claim 4, characterized in that: The top of the light-distributing inner lens (3) bulges upward as a whole, and its top surface is a divergent free-form surface with a center that is concave downward.

21. The long afterglow LED according to claim 5, characterized in that: The top surface of the top of the light-distributing inner lens (3) is an inclined surface with a certain inclination angle or a free-form surface with a certain inclination angle and a convex central portion.

22. The long afterglow LED according to claim 6, characterized in that: The long afterglow luminous lens body (4) is arranged on the side opposite to the polarized light emitting side of the top of the light distribution inner lens (3).

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