Lens assembly and display device

Abstract

The present invention belongs to the field of LED technology and provides a lens assembly and a display device. The lens assembly includes a light guide column and a lens portion for emitting light generated by a light source assembly. One end of the light guide column is connected to the light source assembly, and the other end of the light guide column is connected to the lens portion. The light guide column is provided with a light emitting portion for emitting light incident through the lens portion. Since the light emitting portion is provided on the light guide column, the light incident into the lens assembly through the lens portion will be emitted through the light emitting portion, and will not be emitted through the lens portion again, thereby avoiding the influence of external light irradiating the lens portion on the light emitted by the light source assembly, so that only the light emitted by the light source assembly can be emitted through the lens portion, thereby improving the display effect of the display device.

Description

Technical Field

[0001] The invention belongs to the technical field of LEDs, and more specifically, relates to a lens assembly and a display device. Background Art

[0002] LEDs are widely used in the field of lighting and display technology, mainly including direct-insert LEDs and surface-mount LEDs. Direct-insert LEDs, also known as plug-in light-emitting diodes, are solid-state semiconductor devices that can convert electrical energy into visible light. Their packaging is usually in the form of potting. The potting process includes: first, injecting liquid epoxy resin into the LED molding cavity, then inserting the pressed and welded LED bracket, and then putting it into an oven to allow the epoxy resin to cure, and then removing the LED from the mold cavity to form it. Surface-mount LEDs use PCB boards (Printed Circuit Boards, i.e. printed circuit boards) as substrates and high-brightness surface-mount LEDs as luminous bodies. The luminous bodies are evenly arranged on the front of the PCB board and connected to each other using waterproof connectors. Surface-mount LEDs can well solve problems such as brightness, viewing angle, flatness, reliability, and consistency; compared with other packaged devices, surface-mount LEDs have the advantages of strong vibration resistance, low solder joint defect rate, and good high-frequency characteristics. As people's requirements for the quality of display and lighting become higher and higher, traditional direct-insert LEDs have gradually been replaced by surface-mount LEDs.

[0003] When SMD LEDs are used in the field of display technology, in addition to the impact of brightness and viewing angle, the impact of reflection on display effects also needs to be considered. In order to reduce light loss, the lenses in existing SMD LEDs are usually designed to be relatively smooth, resulting in greater reflection of the lenses. Therefore, when sunlight shines on the lenses, the greater reflection of the lenses will affect the display effects of display devices using SMD LEDs, resulting in unsatisfactory display effects of the display devices.

[0004] The above shortcomings need to be improved. Summary of the invention

[0005] The object of the present invention is to provide a lens assembly to solve the technical problem in the prior art that the display effect of a display device is not ideal due to the high reflectivity of the lens.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a lens assembly, including a light guide column and a lens portion for emitting light generated by a light source assembly, one end of the light guide column is connected to the light source assembly, and the other end of the light guide column is connected to the lens portion, and the light guide column is provided with a light emitting portion for emitting light incident through the lens portion.

[0007] Furthermore, an end of the light guide column connected to the light source assembly is provided with an incident end face, and the incident end face is connected to the light source assembly; an end of the light guide column provided with the incident end face is provided with a notch, and the light emitting portion is provided on a side of the notch facing the lens portion.

[0008] Furthermore, the light guide column further includes an upper side surface inclined downward and a lower side surface inclined upward, the upper side surface is arranged opposite to the lower side surface, and the notch is arranged on one side of the light guide column close to the lower side surface.

[0009] Furthermore, the angle between the light emitting portion and the lower side surface of the light guide column ranges from 60° to 120°.

[0010] Furthermore, the lens portion includes a base for receiving the light from the light source assembly and a lens for emitting the light from the light source assembly, one end of the base is connected to the light guide column, and the other end of the base is connected to the lens.

[0011] Furthermore, the lens protrudes toward a side away from the base, and a plurality of strip-shaped protrusions are provided on the surface of the lens.

[0012] Furthermore, the projection of the lens on the base is a rectangle, and the size of the projection of the lens is (4.0 mm to 8.0 mm)*(4.0 mm to 8.0 mm).

[0013] Furthermore, a fixing seat is provided between the base and the light guide column, one end of the fixing seat is connected to the light guide column, and the other end of the fixing seat is connected to the base, and a fixing column is provided on the fixing seat.

[0014] Furthermore, the incident end face is rectangular, and the size of the incident end face is (1.0 mm to 3.5 mm)*(2.0 mm to 4.5 mm); the length of the light guide column is 5.0 mm to 25.0 mm.

[0015] The object of the present invention is also to provide a display device, comprising a light source assembly, a PCB board and the above-mentioned lens assembly, wherein the light source assembly is fixedly connected to the PCB board, the lens assembly is connected to the PCB board, and the light guide column is attached to the light source assembly.

[0016] The beneficial effect of a lens assembly provided by the present invention is that: since a light emitting portion is arranged on the light guiding column, the light incident into the lens assembly through the lens portion will be emitted through the light emitting portion instead of being emitted through the lens portion again, thereby avoiding the influence of external light irradiating the lens portion on the light emitted by the light source assembly, so that only the light emitted by the light source assembly can be emitted through the lens portion, thereby improving the display effect of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a lens assembly provided by an embodiment of the present invention;

[0019] Figure 2 A schematic structural diagram of a light guide column of a lens assembly provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the structure of the lens portion of the lens assembly provided in an embodiment of the present invention Figure 1 ;

[0021] Figure 4 A schematic diagram of the structure of the lens portion of the lens assembly provided in an embodiment of the present invention Figure 2 ;

[0022] Figure 5 A schematic diagram of a lens assembly emitting sunlight provided by an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the structure of a display device provided by an embodiment of the present invention.

[0024] Among them, the reference numerals in the figure are:

[0025] 1- Lens assembly; 2- Light source assembly; 3- PCB board;

[0026] 11-light guide column; 111-incident end surface; 112-upper side surface;

[0027] 113 - lower side; 114 - upper side of the notch;

[0028] 12- lens portion; 121- base; 122- lens;

[0029] 123-strip-shaped protrusion; 13-light emitting part;

[0030] 14-fixing seat; 141-fixing column; 142-installation mark. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] See also Figure 1 , Figure 5 and Figure 6 A lens assembly 1 includes a light guide column 11 and a lens portion 12 for emitting light generated by a light source assembly 2. One end of the light guide column 11 is connected to the light source assembly 2, and the other end of the light guide column 11 is connected to the lens portion 12. The light guide column 11 is provided with a light emitting portion 13 for emitting light incident through the lens portion 12.

[0034] The working principle of the lens assembly 1 provided in this embodiment is as follows: first, the light guide column 11 is connected to the light source assembly 2; when the light generated by the light source assembly 2 needs to be emitted, the light source assembly 2 is powered on, the light source assembly 2 emits light, and the light generated by the light source assembly 2 reaches the lens portion 12 through the light guide column 11, and is emitted through the lens portion 12; when the sunlight enters the lens assembly 1 through the lens portion 12, the light incident from the lens portion 12 will reach the light exit portion 13 on the light guide column 11, and will be emitted from the lens assembly 1 through the light exit portion 13, and will not be emitted from the lens portion 12. In this embodiment, considering the actual situation of the incident sunlight, the incident angle of the sunlight is considered to be about 10°, that is, when the lens assembly 1 is in a horizontal manner, the optical axis of the lens portion 12 of the lens assembly 1 is parallel to the horizontal axis, and the angle between the sunlight and the optical axis of the lens portion 12 is the incident angle, which is about 10°.

[0035] The beneficial effect of such arrangement is that, since the light emitting portion 13 is arranged on the light guiding column 11, the light incident into the lens assembly 1 through the lens portion 12 will be emitted through the light emitting portion 13 instead of being emitted through the lens portion 12, thereby avoiding the influence of the light irradiated to the lens portion 12 from the outside on the light emitted by the light source assembly 2, so that only the light emitted by the light source assembly 2 can be emitted through the lens portion 12, thereby improving the display effect of the display device.

[0036] See also Figure 2 , further, an incident end face 111 is provided at one end of the light guide column 11 connected to the light source assembly 2, and the incident end face 111 is connected to the light source assembly 2; a notch is provided at one end of the light guide column 11 provided with the incident end face 111, and the light exit portion 13 is provided on a side of the notch facing the lens portion 12. Further, the light guide column 11 also includes an upper side face 112 inclined downward and a lower side face 113 inclined upward, the upper side face 112 and the lower side face 113 are arranged opposite to each other, and the notch is provided on a side of the light guide column 11 close to the lower side face 113. Since the light emitted by the light source assembly 2 is divergent, the upper side face 112 is tilted downward and the lower side face 113 is tilted upward, so that the size of the end of the light guide column 11 close to the light source assembly 2 is smaller than the size of the end of the light guide column 11 close to the lens portion 12, which is beneficial for the light generated by the light source assembly 2 to propagate in the light guide column 11.

[0037] In this embodiment, the upper side 114 of the notch is also inclined upward, and its upward inclination trend is consistent with the upward inclination trend of the lower side surface 113, so that the light generated by the light source assembly 2 can be well propagated in the light guide column 11 after passing through the incident end face 111, and the volume of the light guide column 11 can also be reduced as much as possible.

[0038] Further, the angle between the light emitting portion 13 and the lower side surface 113 of the light guide column 11 is in the range of 60° to 120°; preferably, the angle between the light emitting portion 13 and the lower side surface 113 of the light guide column 11 is 90°. This arrangement is to ensure that the light emitting portion 13 is as perpendicular as possible to the light incident on the light emitting portion 13, so that more light entering the lens assembly 1 through the lens portion 12 can be emitted to the outside of the lens assembly 1 through the light emitting portion 13.

[0039] In this embodiment, the light source assembly 2 includes a red LED, a green LED and a blue LED arranged in a straight line, and the light emitted by the red LED, the green LED and the blue LED is mixed after passing through the lens assembly 1, and white light can be obtained when emitted from the lens portion 12.

[0040] Furthermore, the incident end face 111 is rectangular, and its size is (1.0mm~3.5mm)*(2.0mm~4.5mm), which is consistent with the size of the light source assembly 2; preferably, the size of the incident end face is 1.8mm*2.6mm, so that not only the light emitted by the red light LED, green light LED and blue light LED arranged in a line in the light source assembly 2 can completely pass through the incident end face 111 into the lens assembly 1, but also the size of the incident end face is reduced, thereby reducing the overall volume of the mirror assembly 1.

[0041] See also Figure 3 and Figure 4 Further, the lens portion 12 includes a base 121 for receiving the light of the light source assembly 2 and a lens 122 for emitting the light of the light source assembly 2, one end of the base 121 is connected to the light guide column 11, and the other end of the base 121 is connected to the lens 122. The base 121 is provided to help fix the lens 122 on the one hand, and to receive the light generated by the light source assembly 2 on the other hand.

[0042] Preferably, the lens 122 is convex toward the side away from the base 121, and a plurality of strip-shaped protrusions 123 are provided on the surface of the lens 122. When sunlight irradiates the surface of the lens 122, a portion of the light will be transmitted, thereby entering the interior of the lens assembly 1, and a portion of the light will be reflected; the light transmitted into the interior of the lens assembly 1 will converge to the light-emitting portion 13 under the action of the lens 122, thereby emitting through the light-emitting portion 13, and will not be continuously reflected inside the lens assembly 1 and then emitted through the lens 122; for the reflected light, since the lens 122 is convex toward the side away from the base 121, the light will be further dispersed after being reflected on the surface of the lens 122, and will not be reflected in a certain direction, so the influence of the reflected light on the light generated by the light source assembly 1 can be effectively reduced; and the strip-shaped protrusions 123 are provided on the surface of the lens 122, so that the light can be mixed when passing through the lens 122, so that when necessary, the light emitted by the light source assembly 2 can obtain white light when it is emitted from the lens 122.

[0043] Furthermore, the projection of the lens 122 on the base 121 is the light-emitting surface area of ​​the lens assembly 1, and the light-emitting surface is rectangular, and its size is (4.0mm-8.0mm)*(4.0mm-8.0mm). Preferably, the size of the lens 122 is 6.0mm*6.0mm, so it can be used to design a display device with a smaller dot pitch (the distance between two adjacent light sources), for example, it can be used to design a display device with a dot pitch of 10mm, and has a very broad and good application prospect.

[0044] Furthermore, a fixing seat 14 for fixing is provided between the base 121 and the light guide column 122, one end of the fixing seat 14 is connected to the light guide column 122, and the other end of the fixing seat 14 is connected to the base 121, and a fixing column 141 is provided on the fixing seat 14. Preferably, the surface area of ​​the fixing seat 14 is larger than the surface area of ​​the connecting end of the light guide column 11 and the fixing seat 14, and the surface area of ​​the fixing seat 14 is also larger than the surface area of ​​the connecting end of the base 121 and the fixing seat 14, when the lens assembly 1 is connected to the light source assembly 2, the lens assembly 1 can be fixed by the fixing seat 14; the number of the fixing columns 141 is preferably two, which are distributed on opposite sides of the light guide column 11, so that the connection between the lens assembly 1 and the light source assembly 2 can be more stable.

[0045] Preferably, the fixing base 14 and the light guide column 122 are detachably connected together, for example, by a snap-fit ​​connection, so as to facilitate the connection and disassembly of the fixing base 14 and the light guide column 122 , and also facilitate the maintenance and replacement of the light guide column 122 .

[0046] Furthermore, one end of the fixing seat 14 connected to the base 121 is also provided with an installation mark 142, and the installation mark 142 can be an arrow, so that the installer can quickly determine the installation direction of the lens assembly 1 during installation. Preferably, there are two installation marks 142, and the two installation marks 142 are respectively located on two opposite sides of the base 121, so that the installer can quickly find the installation mark and quickly complete the installation.

[0047] Furthermore, the length of the light guide column 11 is 5.0 mm to 25.0 mm; preferably, the length of the light guide column is 9.5 mm, so that the overall length of the lens assembly 1 can be no more than 14 mm, which greatly reduces the overall length of the lens assembly 1 and can be used to design a thinner display device.

[0048] In fact, the designs of the above-mentioned components in the lens module 1 provided in this embodiment are interrelated: due to the display device's requirements on the light output viewing angle of the lens assembly 1, the surface shape of the lens 122 is interrelated with the length of the light guide column 11, the size of the incident end face 111 of the light guide column 11, and the position and size of the light output portion 13, thereby ensuring that the light generated by the light source assembly 1 can reach the lens portion 12, and has an ideal light output angle after being emitted through the lens 122, while ensuring that the sunlight can be converged to the light output portion 13 after being transmitted through the lens portion 12, so that the sunlight can be emitted through the light output portion 13, and it is also necessary to ensure that the sunlight can be dispersed after being reflected on the surface of the lens 122 without affecting the light generated by the light source assembly 2.

[0049] The beneficial effects of the lens module 1 provided in this embodiment are:

[0050] (1) Since the light emitting portion 13 is provided on the light guide column 11, the light incident into the lens assembly 1 through the lens portion 12 will be emitted through the light emitting portion 13, and will not be emitted through the lens portion 12 again, thereby preventing the light irradiated to the lens portion 12 from the outside from affecting the light emitted by the light source assembly 2, so that only the light emitted by the light source assembly 2 can be emitted through the lens portion 12, thereby improving the display effect of the display device;

[0051] (2) The lens 122 is convex toward the side away from the base 121, so that the light incident into the lens assembly 1 is converged to the light exit portion 13 under the action of the lens 122, and the light is further dispersed after being reflected on the surface of the lens 122, which can effectively reduce the influence of the reflected light on the light generated by the light source assembly 1;

[0052] (3) The surface of the lens 122 is provided with a strip-shaped protrusion 123, which can enable light to be mixed when passing through the lens 122, so that when necessary, the light emitted by the light source assembly 2 can obtain white light when it is emitted from the lens 122;

[0053] (4) Compared with the case where the light emitting portion 13 is not provided, the luminous brightness of the lens module 1 provided in the embodiment can be increased by 4 to 5 times, and the light loss is smaller.

[0054] (5) The luminous viewing angle of the lens module 1 provided in this embodiment can reach: the left viewing angle can reach 15°, the right viewing angle can reach 15°, the bottom viewing angle can reach 15°, and the top viewing angle can reach 7°, which can not only meet the display device's requirements for the luminous viewing angle, but also have a better display effect.

[0055] See also Figure 6 The purpose of this embodiment is also to provide a display device, including a light source assembly 2, a PCB board 3 and the above-mentioned lens assembly 1, the light source assembly 2 is fixedly connected to the PCB board 3, the lens assembly 1 is connected to the PCB board 3, and the light guide column 11 is in contact with the light source assembly 2. Specifically, the display device includes a plurality of light-emitting modules arranged in a matrix and connected to the PCB board 3, each light-emitting module includes a light source assembly 2 and a lens assembly 1, the light source assembly 2 is fixedly connected to the PCB board 3 and connected to an external power supply, the lens assembly 1 is connected to the PCB board 3 through a fixing column 141 on a fixing seat 14, and the incident end face 111 of the lens assembly 1 is in contact with the light source assembly 2, so that the light emitted by the light source assembly 2 can enter the lens assembly 1 through the incident end face 111.

[0056] The working principle of the display device provided in this embodiment is as follows: first, the light source assembly 2 is fixedly connected to the PCB board, and the lens assembly 1 is connected to the PCB board, and at the same time, the incident end face 111 of the lens assembly 1 is made to fit with the light source assembly 2; when it is necessary to work, the light source assembly 2 is powered on, the light source assembly 2 emits light, and the light generated by the light source assembly 2 is incident into the light guide column 11 through the incident end face 111 of the light guide column 11, and reaches the lens part 12 through the light guide column 11, and is emitted through the lens part 12; when a part of the sunlight enters the lens assembly 1 through the lens part 12, When in the middle, the light incident from the lens portion 12 will reach the light exit portion 13 on the light guide column 11, and will be emitted from the lens assembly 1 through the light exit portion 13, but will not be emitted from the lens portion 12; when a part of the sunlight is reflected on the surface of the lens 122, due to the convex surface of the lens 122, the light can be further dispersed after being reflected on the surface of the lens 122, thereby reducing the influence of the reflected light; at the same time, the surface of the lens 122 is provided with a strip protrusion 123, which can make the light mixed when passing through the lens 122, thereby improving the display effect of the display device.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lens assembly, characterized in that: The invention comprises a light guide column and a lens part for emitting light generated by a light source assembly, one end of the light guide column is connected to the light source assembly, and the other end of the light guide column is connected to the lens part, the light guide column is provided with a light emitting part for allowing light incident through the lens part to be emitted from a place other than the lens part, an incident end face is provided at the end of the light guide column connected to the light source assembly, a notch is provided at the end of the light guide column provided with the incident end face, the light emitting part is provided on a side of the notch facing the lens part, the light guide column further comprises an upper side face inclined downward and a lower side face inclined upward, the upper side face is arranged opposite to the lower side face, the notch is arranged on a side of the light guide column close to the lower side face, and an angle between the light emitting part and the lower side face of the light guide column ranges from 60° to 120°, so that more light entering the interior of the lens assembly through the lens part can be emitted to the outside of the lens assembly through the light emitting part.

2. The lens assembly according to claim 1, wherein: The incident end surface is connected to the light source assembly.

3. The lens assembly according to claim 1, wherein: The lens portion includes a base for receiving the light of the light source assembly and a lens for emitting the light of the light source assembly. One end of the base is connected to the light guide column, and the other end of the base is connected to the lens.

4. The lens assembly according to claim 3, characterized in that: The lens protrudes toward a side away from the base, and a plurality of strip-shaped protrusions are arranged on the surface of the lens.

5. The lens assembly according to claim 4, characterized in that: The projection of the lens on the base is a rectangle, and the size of the projection of the lens is (4.0 mm to 8.0 mm)*(4.0 mm to 8.0 mm).

6. The lens assembly according to claim 3, wherein: A fixing seat is further provided between the base and the light guide column, one end of the fixing seat is connected to the light guide column, and the other end of the fixing seat is connected to the base, and a fixing column is provided on the fixing seat.

7. The lens assembly according to any one of claims 2 to 6, characterized in that: The incident end face is rectangular, and the size of the incident end face is (1.0mm-3.5mm)*(2.0mm-4.5mm); the length of the light guide column is 5.0mm-25.0mm.

8. A display device, characterized in that: The invention comprises a light source assembly, a PCB board and the lens assembly according to any one of claims 1 to 7, wherein the light source assembly is fixedly connected to the PCB board, the lens assembly is connected to the PCB board, and the light guide column is connected to the light source assembly.

Images