TWM451497U - Illumination led lamp with wide emission angle - Google Patents

Description

LED lamp with large illumination angle

The present invention relates to a lighting fixture using a light-emitting diode as a light source, and more particularly to a light-type lighting fixture capable of forming a uniform light intensity distribution with an illumination intensity distribution angle greater than 135°.

With the advancement of science and technology and the development of the people's livelihood economy, it will bring comfort and convenience to human beings. In addition to providing the necessary light in life at night, lighting fixtures also play an important role in daytime work and business activities. In lighting fixtures, incandescent bulbs have been illuminated for more than a century. Traditional incandescent bulbs are cheap, convenient and bright, but because they emit heat, they also burn a lot of energy. In order to save energy, the United States, Japan and The EU has begun to implement plans to phase out incandescent lamps, and other countries have also Will follow up. In addition, although the fluorescent power-saving bulbs have low power consumption, consumers suspect that their beams are not soft enough, and they contain a small amount of mercury, which poses a risk of pollution and is also listed as the next wave of lighting fixtures that countries will disable. In contrast, among various lighting fixtures, mercury-free LED lamps have high brightness, small size, power saving (power consumption is only one-fifth of that of incandescent lamps), and long life (twenty-five incandescent lamps) The advantage of ten times) is the high-efficiency lighting power source.

According to the US Energy Star specification IES LM-79-80, section 10 requires a replacement lamp to have a luminous intensity (candelas) at any angle in the range of 0 to 135°. The average light intensity in this region is 20%, and there is at least 5% total flux (lumens) in the region of 135-180°.

Therefore, in order to develop a larger angle of light type to be close to the US Energy Star IES LM-79-80, Section 10 specification, Taiwan Patent Publication No. TW201226803 discloses the use of a composite surface having a concave surface and a concave surface. Lens, as shown in Fig. 10, the composite lens A1 is applied to a bulb A, which is covered by the LED wafer A2 to the composite lens A1, accommodated in the housing A3 and connected to the power source by the E27 connector A4, wherein the composite The lens A1 is composed of a central lens A11, a wing lens A12 and a ring wall lens A13. The LED chip A2 is accommodated under the center of the ring space A14 of the composite lens A1. After the LED chip A2 emits a light beam, the central lens is passed through the concave surface. A11 concentrates the light beam toward the center, and uses the ring wall lens A13 to disperse the light beam to the periphery to form a large angle dispersion. However, since the light beam is concentrated in the central region, the near-axis region is too bright and the light intensity of the off-axis region is insufficient. And affected by the incident surface of the ring space A14 plane, the beam emitted by the LED chip A2 reaches the incident surface of the ring space A14, and the incident angle of the beam is large (such as 0~60°), so that the plane enters the ring space A14 plane. Fold of the incident surface Angle Smaller, it is impossible to make the incident beam form a larger angle of dispersion, resulting in insufficient dispersion of the beam; moreover, for the multi-wafer bulb A, a plurality of composite lenses A1 are required to cover each LED chip A2, except In addition to affecting the light effect between adjacent composite lenses A1, the assembly is inconvenient and the cost is high, which is not satisfactory for practical purposes. For example, U.S. Patent Publication No. US20110110093 adopts a semi-circular incident surface and a plane-emitting surface, which can increase the angle of exit, but still does not meet the specifications of the US Energy Star IES LM-79-80, section 10; Or, as disclosed in Taiwan Patent Publication No. TW201121102, an optical lens having a concave apex in the paraxial region is used. Chinese Patent Publication No. CN201020676949.0 discloses the use of a wide-angle lens, a convex surface on the incident surface, and a concave surface on the exit surface. The design enhances the light intensity at a large angle (70~80°) by reducing the light intensity in the central region (0~60°), but the angle is still lower than the specification of the beam angle 0~135°; Japanese Patent Publication No. JP2006-113556 and U.S. Patent No. 7,715,002 use two lenses to create an air gap at the center of the lens for distributing the light beam emitted by the LED chip for application to the LED backlight, but the beam distribution is mainly in the lateral direction. The central region has less light beam distribution and is not suitable for illumination purposes, and the use of two lens combinations also increases the manufacturing cost, which is not conducive to practical use. U.S. Patent Publication No. US20080151551 uses a concave lens whose entrance surface is concave and whose exit surface is flat, and distributes the light beam emitted by the LED. However, after the light beam is distributed, the light pattern is in the central region (within 45°), and the light intensity is only The maximum light intensity is 10%, and the light intensity drops sharply to 1% of the maximum light intensity after the beam angle of the peripheral region is 120°, which does not meet the requirements of the ENERGY STAR specification.

In terms of commodities, Taiwan’s Lextar proposed LED bulbs in March 2012, using LED arrays to achieve LED bulbs. A light pattern with an angle of 160° or more, which uses a plurality of LEDs arranged on a three-dimensional columnar pillar instead of using a lens to distribute light, although a plurality of LEDs generate a large angle of light at different heights and angles, but It requires a relatively large number of LEDs, which is expensive and difficult to assemble.

Due to the low energy consumption of LEDs, the use of LED lighting fixtures will reduce the need for lighting energy, but because the light emitted by LEDs is directional, unlike traditional human lighting requirements, how to increase the light emitted by LEDs The light emission angle and the light intensity uniformity are distributed to form the required light type, which is an urgent problem to be solved. However, for a single LED chip, the light intensity (in Candela) of the LED chip is the strongest at the optical axis, and the light intensity away from the optical axis will be weaker. Therefore, in the prior art, the design of the LED illumination source is In addition, the light intensity of the paraxial region is often reduced by increasing the refractive power of the light exit surface and the light incident surface, and the light intensity is compensated to the far axis region to increase the light uniformity. However, this will result in the light beam. Fresnel reflection occurs on the light exit surface, which causes side effects of reduced luminous flux; especially for an illuminating light source that requires many LED chips to form an LED lighting fixture, it is more necessary to design a light that can control the emission of multiple LED chips. Lenses, which allow light to reduce losses, even meet the requirements of the ENERGY STAR specification, remain an urgent issue for the industry.

The main purpose of the present invention is to provide an LED luminaire with a large illuminating angle to increase the light utilization efficiency of the illuminating diode and to control the distribution of the light emitted by the illuminating diode, thereby forming a more uniform light intensity distribution of the illuminating beam. (luminous intensity distribution) angle greater than 135° Light type.

According to the purpose of the present creation, an LED lamp having a large illumination angle is proposed. The LED lamp mainly comprises a light source device and a joint. The light source device includes a light emitting diode element and a light control lens disposed on an upper edge of a light emitting surface of the light emitting diode element; the light source device further includes a circuit substrate, the light emitting diode The component is electrically connected to the circuit substrate. The LED lamp further includes a lamp cover and a heat dissipating body, the heat dissipating body has a first end and a second end, the first end is provided with a carrying surface, the carrying surface is provided with a light source device, and the second end is connected to the joint, The lamp cover is coupled to the first end of the heat sink and sandwiches the light source device therein. The light emitting diode element can be a single light emitting diode chip or a combination of a plurality of light emitting diode chips.

The light control lens is axisymmetric and symmetrical to an optical axis of the light emitting diode element, and includes a light incident surface, a light exit surface and a lens bottom surface, the lens bottom surface extending from the light incident surface and It is connected to the light exit surface. The lens bottom surface is equiangularly provided with a plurality of lens legs fixed on a plane around the light emitting diode element so that the light control lens can be located on the light emitting surface edge of the light emitting diode element. The light exit surface includes an exit optical surface and an exit end surface adjacent to the lens bottom surface and the exit optical surface, and the exit optical surface is an aspherical surface or a free curved surface. The exiting optical surface includes an exiting optical path change point, and the light beam emitted from the center of the light emitting surface of the light emitting diode element is calculated from the optical axis to the exit end surface, and total reflection begins to occur at the exiting optical path change point. The light incident surface includes an incident optical surface and an incident end surface adjacent to the bottom surface of the lens and the incident optical surface, and the incident optical surface is an aspherical surface or a free curved surface. Preferably, the exiting optical surface can be designed to be out of the light beam The direction of the beam is convex at the near-optical axis, and starts from the direction of the exit end face. After the inflection point, it changes to a concave surface, and then passes through the inflection point and then transforms into a convex surface. The incident optical surface can be designed to face the incident direction of the light beam, be convex at the near optical axis, transform into a concave surface after an inflection point, and then transform into a convex surface after at least one inflection point. Alternatively, the incident optical surface may be designed to face the incident direction of the light beam, be concave at the near optical axis, and transform into a convex surface after at least one inflection point.

Preferably, the light control lens can more satisfy the following conditions, so that the light control lens of the present invention can have an appropriate beam distribution capability, and the light beam emitted by the light emitting diode element can be distributed to a larger angle, and the light emitted. The angle between the line connecting the center of the light-emitting surface of the light-emitting diode element and the optical axis is θ ₀ , and the θ ₀ may be between 30° and 45°, that is, the following conditions are satisfied: If the formula (1) is satisfied, the slope of the tangent of the optical path change point on the exiting optical surface and the position with respect to the optical axis Z can be controlled to an appropriate size so that the light beam exceeding the optical path change point does not refract wear on the exit optical surface. The exiting optical surface causes the beam to concentrate at a smaller beam angle, producing total reflection at the point of change of the optical path, and totally reflecting the beam to a larger beam angle. The light beam emitted by the light-emitting diode element passes through the illumination beam generated by the light control lens, and satisfies the following conditions: Wherein, I _{135° is} the light intensity of the LED lamp with a large illumination angle at a relative infinity from the center of the light-emitting surface when the angle is 135° with the optical axis; I _max is the LED lamp with a large illumination angle The highest value of light intensity at any point relative to the infinity of the center of the illuminating surface at any angle to the optical axis.

In addition, the LED lamp further includes a pad body, and the pad body is disposed on Carrying the light source device on the carrying surface, when the diameter of the light control lens is small, the position of the light source device is increased by the pad body, and the light emitted from the light emitting diode element into the light control lens can be avoided. Light with a small angle (incident light closer to the illuminating surface) is shielded by the heat sink, ensuring that the illumination beam of the LED luminaire can reach 135°.

In addition, a light homogenizing element may be disposed above the light control lens, and the light homogenizing element may be a diffusion sheet, or a lens having a Fresnel optical surface or having a microstructured optical surface ( Micro-structure optical surface lens.

The LED lamp with a large illumination angle of the present invention has the following advantages:

<1> By the formula (1) of the present invention, it represents that the light beam emitted from the center of the light-emitting surface of the LED lamp enters the light incident surface and starts to generate total reflection at the exiting optical path change point, and the light beam is controlled and distributed to a larger extent. Angle, and in order to have better light efficiency, the position of the exiting optical path change point can be within a specific angular range, so that the light-emitting diode light control lens of the present invention can further have appropriate beam control and distribution, Improve the uniformity of the light source device.

<2> Further, by the formula (2) of the present invention, it represents a light beam emitted by an LED lamp, which can be controlled and distributed to 135° or more, and not lower than 30% of the highest light intensity, not only in accordance with Energy Star. The light intensity at any angle in the 0~135° region shall not be lower than the average light intensity of 20% in this region, and is much higher than the requirements of the ENERGY STAR specification.

In order to make the present invention more clear and detailed, the preferred embodiment and the following drawings are used to describe the structure of the present invention and its technical features as follows.

Please refer to Figure 1, which is an LED lamp with a large illumination angle. A schematic diagram of the combination of the first embodiment. The structure of the LED lamp having a large illumination angle mainly includes a light source device 1 and a connector 2, the light source device 1 includes a light emitting diode element 11 and an upper edge of a light emitting surface 111 disposed on the light emitting diode element The light controls the lens 12. The light-emitting diode element 11 is electrically connected to the joint 2, and the joint 2 can be connected to the mains by using an E27-type joint. The light emitting diode element 11 is disposed on a circuit substrate 13. The LED lamp may further include a heat dissipating body 3 having a first end 31 and a second end 32. The first end 31 is provided with a loading surface 311 for providing the light source device 1 . The second end 32 is connected to the joint 2, and the surface of the heat sink 3 may be a smooth surface or formed into a fin shape as shown to improve heat dissipation efficiency. Based on soft light and safety considerations, the LED lamp can further include a lamp cover 4 that is coupled to the first end 31 of the heat sink and encloses the light source device 1 therein.

After the mains enters the E27 connector 2 of the LED lamp having a large illumination angle, the circuit of the connector 2 can convert the commercial power into the applicable voltage and current of the LED component 11, via the circuit substrate 13 and the illumination II. The polar body element 11 is electrically connected, so that the light emitting diode element 11 emits a light beam and the light control lens 12 uniformly controls and distributes the light beam to a large angle, and is emitted by the light cover 4 for illumination; the heat sink 3 is used; Then, the thermal energy generated by the light-emitting diode element 11 can be conducted to the outside through heat conduction and heat radiation.

Please refer to FIG. 2, which is a schematic structural view of a light source device of the first embodiment. The LED component 11 generally includes a light-emitting diode chip (not shown) and a fluorescent adhesive layer (not shown), and the fluorescent adhesive layer covers the light-emitting diode. On the wafer, when the light emitting diode chip is excited to emit light, wavelength conversion is performed through the fluorescent adhesive layer, and a light beam is emitted on the surface of the fluorescent adhesive layer, and the surface of the emitted light beam is the light emitting surface 111. The illuminating mask has a geometric center O point. The light control lens 12 includes a light incident surface 121, a light exit surface 122 and a lens bottom surface 123. The lens bottom surface 123 extends from the light incident surface 121 and is in contact with the light exit surface 122. The light exit surface 122 includes an exit optical surface 1221 and an exit end surface 1222 adjacent to the lens bottom surface 123 and the exit optical surface 1221. The exit optical surface 1221 can use an aspheric or free-form surface design. The exiting optical surface 1221 is convex at the near optical axis in the beam exit direction, and is transformed into a concave surface after passing through at least one inflection point P _{0 in the} direction of the exit end surface 1222. The lowest point of the concave surface is P ₁ , and the exit optical surface 1221 is further converted into a convex surface by at least one inflection point P ₂ ; the outgoing optical surface 1221 includes an exit optical path change point P ₃ . The light incident surface 121 includes an incident optical surface 1211 and an incident end surface 1212 adjacent to the lens bottom surface 123 and the incident optical surface 1211. The incident optical surface 1211 can be designed using an aspherical or free-form surface. The optical surface can be used to maximize the use of the incident beam and the angle at which the beam is incident, and the surface shape of the incident optical surface can be as shown in Fig. 2, the incident optical surface 1211 faces the incident direction of the beam, and the low beam The shaft is concave and transforms into a convex surface after at least one inflection point P ₄ . Or, as shown in Fig. 3, facing the incident direction of the light beam, it is a convex surface at the near optical axis, and becomes a concave surface after passing through an inflection point P ₅ , and then becomes a convex surface after passing through at least one inflection point P ₆ . The lens bottom surface 123 of the light control lens 12 is equiangularly provided with a plurality of lens legs 124. For different application embodiments, the lens legs 124 may be annular to facilitate manufacturing.

Referring to FIG. 3, the light control lens 12 and the LED element 11 are combined in such a manner that the optical axis Z of the light control lens 12 is substantially perpendicular to the light emitting surface 111 of the LED component. And further The optical axis Z is passed through the geometric center O of the light-emitting surface 111 of the light-emitting diode element 11, and the lens leg 124 is fixed to the plane around the light-emitting diode element 11 (the circuit board 13 or the carrier surface 311). The lens bottom surface 123 of the light control lens 12 is located at the upper edge of the light emitting surface 111 of the light emitting diode element, and the plane of the lens bottom surface 123 is The plane in which the light-emitting surface 111 is located is in the same plane, or the plane in which the lens bottom surface 123 is located may have a spacing h from the plane in which the light-emitting surface 111 is located, which is advantageous for heat dissipation.

Please refer to FIG. 4, which is a symbolic representation of the angle of the light control lens. Since the center of the beam 111 of the light-emitting surface of the light-emitting diode element O emitted, starting from the optical axis Z direction to the exit end 1222, to the outgoing light path changing point P ₃ starts total reflection. Preferably, the light control lens 12 can more satisfy the following conditions, so that the light control lens of the present invention can have an appropriate beam distribution capability, and the light beam emitted from the LED component can be distributed to a larger angle. The angle between the connection point P ₃ and the center O of the light-emitting surface 111 of the light-emitting diode element and the optical axis is θ ₀ , preferably the θ ₀ may be between 30° and 45°, that is, The following conditions are met: If the formula (1) is satisfied, the slope of the tangent to the optical path change point P _{3 on} the exit optical surface 1221 and the position relative to the optical axis Z can be controlled to an appropriate size so that the light beam exceeding the optical path change point P ₃ is exit optical surface 1221, no refraction occurs piercing the exit surface 1221 causing the optical beam focused on a small beam angle, total reflection occurs ₃ starts optical path changing point by P, and the light beam totally reflected light beam to a larger angle (e.g., 5 Figure shows).

Please refer to FIG. 6 , which is a schematic diagram of the light distribution curve of the illumination beam of the LED lamp with a large illumination angle which is actually tested by the integrating sphere. The light beam emitted by the LED component of the LED lamp of the present invention passes through the illumination beam generated by the light control lens, and satisfies the following conditions: Wherein, I _{135° is} the light intensity of the LED lamp with a large illumination angle at a relative infinity from the center of the light-emitting surface when the angle is 135° with the optical axis; I _max is the LED lamp with a large illumination angle The highest value of light intensity at any point relative to the infinity of the center of the illuminating surface at any angle to the optical axis.

Please refer to FIG. 7 , which is a schematic diagram of a second embodiment of an LED lamp with a large illumination angle. For different application purposes, the LED component 11 can be a single LED or can be composed of a plurality of LEDs. When the LED component is composed of a plurality of LEDs, the LED component is composed of a plurality of LEDs. The light-emitting surface 111 of the light-emitting diode element 11 is formed by combining the light-emitting surfaces 111 of the light-emitting diodes and their gaps. In the eighth embodiment, the light-emitting diode elements 11 are formed as a light source by using a plurality of light-emitting diodes, and the light-emitting diodes can be disposed symmetrically or substantially at an average position along a central axis of the light source device. The light control lens 12 is disposed. These light emitting diode elements 11 are then covered. For a non-limiting embodiment, the light-emitting diode element 11 can also be fabricated as a single light-emitting diode element 11 by a COB (Chip On Board) packaging process using a plurality of light-emitting diodes. Through the light control lens 12, the light utilization efficiency of the light emitting diode can be increased and the light beam emitted by the light emitting diode can be controlled and distributed, thereby forming a more uniform light intensity distribution and the illumination beam is at 135°. The light intensity satisfies the purpose of at least a 30% light pattern of I _max .

Please refer to FIG. 8 , which is a schematic diagram of a third embodiment of an LED lamp with a large illumination angle. Main performance, the load of the heat sink 3 A pad 5 of a suitable height is added to the surface 311. When the diameter of the light control lens 12 is small, the height of the position of the light source device is increased by the pad body 5, and the incident angle of the light control lens 12 from the light emitting diode element 11 can be prevented from being smaller (closer to the light). The illumination beam emitted by the light incident on the light control lens 12 is shielded by the heat sink 3, ensuring that the illumination beam of the LED lamp can reach 135°.

Please refer to FIG. 9 , which is a schematic diagram of a fourth embodiment of an LED lamp with a large illumination angle. For the purpose of uniform light, a light homogenizing element 6 is disposed above the light control lens 12. The light-collecting element 6 can be disposed in a manner of bonding or can be disposed between the light-homogenizing element 6 and the light-controlling lens 12 (not shown). The light-storing element 6 can be fixed to the light by the bonding structure. Above the control lens 12. Wherein, the light homogenizing element 6 can be a diffusion sheet, or a lens having a Fresnel optical surface (not shown) or having a micro-structure optical surface. Lens (not shown). The light homogenizing element can be made of plastic or acrylic material.

The light control lens 12 of the LED lamp of the present invention can inject a light beam emitted from the light emitting diode element through the light incident surface 121 of the light control lens 12 and exit the light exit surface 122 to form an illumination centered on the light axis. The beam is greater than 135° and the light intensity distribution at 135° is increased to more than 30% of the maximum light intensity to exceed ENERGY STAR specifications for LED bulbs.

The above description is only the preferred embodiment of the present invention, and is merely illustrative and not limiting. It will be apparent to those skilled in the art that many changes, modifications, and equivalent changes may be made in the spirit and scope of the present invention as defined by the appended claims. Within the scope of rights.

1‧‧‧Light source device

2‧‧‧Connectors

11‧‧‧Lighting diode components

111‧‧‧Lighting surface

12‧‧‧Light control lens

121‧‧‧Light incident surface

1211‧‧‧Injecting optical surface

1212‧‧‧ incident end face

122‧‧‧Light exit surface

1221‧‧‧Out of the optical surface

1222‧‧‧ exit end face

123‧‧‧ lens bottom surface

124‧‧‧Lens feet

13‧‧‧ circuit substrate

3‧‧‧ Heat sink

31‧‧‧ first end

311‧‧‧Sales

32‧‧‧second end

4‧‧‧shade

5‧‧‧ cushion body

6‧‧‧Homogeneous components

The lowest point of the concave surface of P ₁ ‧ ‧ is

P ₂ ‧ ‧ recurve

P ₃ ‧‧‧Outset optical path change point

P ₄ ‧ ‧ recurve

P ₅ ‧ ‧ recurve

P ₆ ‧ ‧ recurve

O‧‧‧Lighting surface center

H‧‧‧Distance between the center of the light-emitting surface on the optical axis and the bottom surface of the lens

Z‧‧‧ optical axis

θ ₀ ‧‧‧An angle between the line connecting the optical path change point to the center of the light-emitting surface and the optical axis

I _{135 °} ‧‧‧Light intensity at a relatively infinity when the light source is at an angle of 135° to the optical axis

I _max ‧‧‧The highest value of light intensity at any point relative to infinity at any angle with the optical axis

A‧‧‧Bub Light

A1‧‧‧ compound lens

A2‧‧‧LED chip

A3‧‧‧ outer cover

A4‧‧‧E27 connector

A11‧‧‧ central lens

A12‧‧‧ wing lens

A13‧‧‧Ring lens

A14‧‧‧ Ring Space

1 is a schematic view showing the combination of the LED lamp of the first embodiment; FIG. 2 is a schematic structural view of the light source device of the first embodiment; and FIG. 3 is a structure of the light source device according to another embodiment of the first embodiment. FIG. 4 is a schematic diagram showing the relative angle of the light control lens of the present invention; FIG. 5 is a schematic diagram of the illumination of the LED lamp of the first embodiment; FIG. 6 is an illumination beam of the LED lamp having a large illumination angle. Schematic diagram of the light distribution curve actually tested by the integrating sphere; FIG. 7 is a schematic diagram of the second embodiment of the LED lamp with a large illumination angle; FIG. 8 is a schematic diagram of the third embodiment of the LED lamp with a large illumination angle. Fig. 9 is a schematic view showing the combination of the fourth embodiment of the LED lamp having a large illumination angle; and Fig. 10 is a schematic view showing the structure of the conventional bulb lamp.

1‧‧‧Light source device

11‧‧‧Lighting diode components

111‧‧‧Lighting surface

12‧‧‧Light control lens

124‧‧‧Lens feet

13‧‧‧ circuit substrate

2‧‧‧Connectors

3‧‧‧ Heat sink

31‧‧‧ first end

311‧‧‧Sales

32‧‧‧second end

4‧‧‧shade

Claims (13)

An LED lamp having a large illumination angle, comprising: a light source device comprising a light emitting diode component and a light control lens, wherein the light control lens is disposed on an upper edge of a light emitting surface of the light emitting diode component; And a connector disposed under the light source device and electrically connected to the light emitting diode element; wherein the light beam emitted by the light emitting diode element, through an illumination beam formed by the light control lens, satisfies the following condition: Wherein, I _{135° is} the light intensity of the LED lamp with a large illumination angle at a relative infinity from the center of the light-emitting surface when the angle is 135° with the optical axis; I _max is the LED lamp with a large illumination angle The highest value of light intensity at any point relative to the infinity of the center of the illuminating surface at any angle to the optical axis. The LED lamp having a large illumination angle according to claim 1, wherein the light control lens is axisymmetric and symmetrical to an optical axis of the LED component, and includes a light incident surface and a light exit surface. And a lens bottom surface extending from the light incident surface and contacting the light exit surface; the light exit surface includes an exit optical surface and an exit end surface, the exit end surface being adjacent to the lens bottom surface And the exiting optical surface, wherein the exiting optical surface is an aspherical surface or a free curved surface; the outgoing optical surface includes an exiting optical path change point, and the light beam emitted from the center of the light emitting surface of the light emitting diode element is calculated from the optical axis To the exit end face, total reflection is generated at the exiting optical path change point; the light incident surface includes an incident The optical surface and an incident end surface are adjacent to the bottom surface of the lens and the incident optical surface, and the incident optical surface is an aspherical surface or a free curved surface. The LED lamp having a large illumination angle according to Item 2 of the patent application scope, wherein the exiting optical path change point satisfies the following conditions: Where θ ₀ is the angle between the line connecting the exit path change point to the center of the light-emitting surface of the light-emitting diode element and the optical axis. An LED lamp having a large illumination angle according to claim 2, wherein the exiting optical surface is convex at a near-optical axis in a beam exiting direction, starting from the direction of the exit end, and transforming after the inflection point It is a concave surface, and then transformed into a convex surface after the inflection point. According to the fourth aspect of the invention, the LED lamp having a large illumination angle, wherein the incident optical surface faces the incident direction of the light beam, is convex at the near optical axis, and is transformed into a concave surface after an inflection point, and then at least After a recurve, it turns into a convex surface. The LED lamp having a large illumination angle according to claim 4, wherein the incident optical surface faces the incident direction of the light beam and is concave at the near optical axis, and is transformed into a convex surface after at least one inflection point. The LED lamp having a large illumination angle according to the first aspect of the invention, wherein the light source device further comprises a circuit substrate, the LED component is electrically connected to the circuit substrate, and the LED lamp further comprises a lamp cover And a heat dissipating body having a first end and a second end, wherein the first end is provided with a loading surface for providing the light source device, the second end is connected to the joint, the lamp cover and the heat dissipation The first end of the body is combined and the light source device is sandwiched therein. The LED lamp having a large illumination angle according to claim 7 , wherein the LED lamp further comprises a pad body disposed on the carrier surface and configured to carry the light source device. The LED lamp having a large illumination angle according to the seventh or eighth aspect of the patent application, wherein the lens bottom surface of the light control lens is equiangularly provided with a plurality of lens legs fixed to the light emitting diode element On a plane around. An LED lamp having a large illumination angle according to claim 9 of the invention, wherein a light homogenizing element is disposed above the light control lens. An LED lamp having a large illumination angle according to claim 10, wherein the homogenizing element is a diffusion sheet. An LED lamp having a large illumination angle according to claim 10, wherein the homogenizing element has a Fresnel optical surface or has a micro-structure optical surface. The LED lamp having a large illuminating angle according to claim 1, wherein the illuminating diode component is a single illuminating diode chip or a combination of a plurality of illuminating diode chips.