Back reflection dodging module, lamp and backlight source

Abstract

The invention provides a back reflection dodging module, a lamp and a backlight source, the back reflection dodging module comprises a light source and a transflective part, the back reflection dodging module takes the light emitting surface orientation of the light source as the light emitting direction, the transflective part is arranged on the light emitting path of the light source, and the transflective part is arranged on the light emitting path of the light source. The light source is provided with a light emitting face and a light transmitting face protruding towards the light emitting face of the light source, so that when light of the light source is projected to the light transmitting face, the light is reversely reflected by the light transmitting face in the direction opposite to the light emitting direction and then is emitted in the light emitting direction through secondary reflection, and the illumination area is enlarged based on double reflection of the light in the axial direction. The dependence on a complex curved lens is reduced, the structure of the back reflection dodging module is simplified, the cost of the back reflection dodging module is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lighting technology, in particular to a back reflection uniform light module, a lamp and a backlight. BACKGROUND

[0002] With the continuous development of LED lighting technology, people in the traditional lighting needs to meet the actual effect of lighting, light comfort have higher requirements. Especially for liquid crystal display backlight, advertising light box and ceiling lamp and other application fields, people require the corresponding lighting device needs to have both large angle beam and beam uniform dual characteristics, so that the current need to be converted into a larger angle through secondary optical design of light emitting elements, such as through the lens of refraction and / or reflection of secondary optical design to expand the light angle.

[0003] Reference Figure 1 As shown in the distribution view of the light formed by a light emitting module disclosed in a Chinese patent with patent number CN105785486B, the light emitting module includes a light emitting device 100 and an optical lens 300, among the light emitted by the light emitting device 100, the incidence angle of the first light L1 incident on the first point P1 of the light input surface 320 is defined as the first angle θ1 relative to the central axis Y0, and the emission angle of the first light L1 emitted to the second point P2 of the first light output surface 330 is the second angle θ2 relative to the central axis Y0, the second angle θ2 is greater than the first angle θ1, the second angle θ2 of the first light output surface 330 is the emission angle after refraction, and is greater than the incidence angle before refraction, when the first light L1 propagating to the first light output surface 330 of the light is incident on the first light output surface 330 by refraction through the light input surface 320, the first light output surface 330 can diverge the first light L1 to the side direction of the optical lens 300, so as to realize the conversion of the light beam of the light emitting device 100 to a larger angle light beam, but still does not change the light spatial distribution of the light emitting device 100, the light emitting device 100 is a Lambertian distribution of light, and the light after passing through the optical lens 300 is still Lambertian.

[0004] In other words, the core principle of the above technical solution is to design an optical lens 300 with a specific curved surface so that the light emitted by the light-emitting device 100 is refracted once or multiple times, changing its direction to be perpendicular to the light-emitting surface axis or at a large angle to the axis, thereby expanding the beam angle. However, the optical lens 300 of the existing technical solution needs to meet sufficient size on the central axis Y0. Nowadays, in addition to requirements for lighting effect, people also have higher requirements for the aesthetics of lamps, displays and other devices. Thin and light designs are more popular. When there are strict limitations on the thickness of the lamp, the existing technical solution's ability to expand the beam angle will be greatly reduced, and the problem of uneven light output from the original light-emitting device 100 will still be retained. At the same time, when the axial size of the existing technical solution is compressed, the reflection loss and light leakage rate inside the lens will inevitably increase, resulting in a decrease in overall luminous efficiency.

[0005] In summary, current technical solutions for achieving large-angle beams cannot reduce the thickness along the central axis of the light-emitting module, preventing the product from being designed to be thinner and thus failing to meet aesthetic requirements. Furthermore, existing light-emitting elements exhibit uneven light emission, with high irradiance in the central area and low irradiance around the perimeter. The aforementioned technical solutions can only expand the beam angle and cannot simultaneously meet the requirement of uniform light distribution. Therefore, developing a technical solution with a large-angle beam, reduced axial dimensions, and uniform irradiance is of significant importance and market value. Summary of the Invention

[0006] One object of the present invention is to provide a back-reflection uniform light module, a lamp and a backlight, wherein the back-reflection uniform light module achieves an expansion of the beam coverage in the lateral direction while ensuring thinness in the axial dimension, satisfying the illumination effect of large-angle beams while improving aesthetics.

[0007] Another objective of the present invention is to provide a back-reflection uniform light module, a lamp and a backlight, wherein the back-reflection uniform light module doubles the illumination area by reflecting light in the axial direction and ensures the uniformity of illumination.

[0008] Another objective of this invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the back-reflection uniform light module achieves uniform large-angle light output with a small axial dimension, is suitable for various scenarios such as direct-lit lamps, LCD backlight modules, advertising light boxes, and spatial lighting in large living rooms and conference rooms, and also has aesthetic advantages.

[0009] Another objective of this invention is to provide a back-reflection uniform light module, a luminaire, and a backlight source, wherein the back-reflection uniform light module expands the illumination area based on the double reflection of light in the axial direction, reduces the dependence on complex curved lenses, thereby simplifying the structure of the back-reflection uniform light module, and helps to reduce the cost of the back-reflection uniform light module and improve production efficiency.

[0010] Another objective of this invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the back-reflection uniform light module can form uniform irradiance within a corresponding illumination range, ensuring visual effects.

[0011] Another object of the present invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the back-reflection uniform light module includes a light source and a reflective element disposed in the light-emitting path of the light source, wherein the reflective element has a reflective surface protruding toward the light-emitting surface of the light source, wherein the light-emitting surface of the light source is oriented as the light-emitting direction of the back-reflection uniform light module, wherein the light from the light source is projected onto the reflective surface and reflected away from the light-emitting direction by the reflective surface to expand the beam range based on the first reflection, and subsequently, the light reflected by the reflective surface is reflected and emitted toward the light-emitting direction to further expand the beam angle and optimize the beam uniformity based on the second reflection.

[0012] Another objective of this invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the secondary reflection of the back-reflection uniform light module can be achieved by means of a corresponding lamp board and mounting plate, thereby eliminating the need for a dedicated reflection structure, which helps to further simplify the structure of the back-reflection uniform light module and reduce the cost of the back-reflection uniform light module.

[0013] Another objective of this invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the back-reflection uniform light module forms a light reflection of the light source on the light emission path of the light source based on the reflective element, which can effectively weaken the irradiance at the center of the back-reflection uniform light module and reflect the light to the surrounding area, thereby achieving a uniform light effect with uniform irradiance and improving the visual effect.

[0014] Another object of the present invention is to provide a back-reflection uniform light module, a lamp and a backlight, wherein the back-reflection uniform light module includes a primary and a secondary reflective surface, wherein the secondary reflective surface is disposed opposite to the transmissive reflective surface, that is, the secondary reflective surface faces the light emission direction, wherein the light reflected by the transmissive reflective surface is projected onto the secondary reflective surface and reflected by the secondary reflective surface and emitted in the light emission direction, so as to expand the beam angle based on the secondary reflection.

[0015] Another object of the present invention is to provide a back-reflection uniform light module, a lamp, and a backlight, wherein the secondary reflective surface is realized by the side of the PCB board carrying the light source facing the light source, and / or by the side of the mounting plate of the back-reflection uniform light module facing the back-reflection uniform light module (e.g., ceiling, PE reflector). This eliminates the need for a dedicated reflective structure for forming the secondary reflection, thereby simplifying the structure of the back-reflection uniform light module and reducing its cost.

[0016] Another objective of the present invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the transflective surface is a convex surface that protrudes toward the light-emitting surface of the light source, thereby increasing the reflection angle based on the convex reflective surface, thereby increasing the beam range of the first reflection and expanding the light spot of the first reflection.

[0017] Another objective of the present invention is to provide a back-reflection uniform light module, a lamp and a backlight, wherein the transmissive surface is a convex surface in the shape of a cone, thereby increasing the beam range of the first reflection, expanding the light spot of the first reflection, and then projecting a larger beam area in the direction away from the light emission direction to further expand the emitted beam angle.

[0018] Another objective of this invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the transmissive surface is a convex surface with a multi-segmented conical shape, and the beam range reflected by the transmissive surface is further improved by the segmented conical surface design with different inclinations.

[0019] Another object of the present invention is to provide a back-reflection uniform light module, a lamp and a backlight, wherein the edge of the translucent surface is designed as an inclined surface that bends toward the light-emitting surface of the light source, thereby effectively reflecting the light from the side and reducing the light in the direction perpendicular to the axial direction of the back-reflection uniform light module.

[0020] Another objective of this invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the transmissive surface has a reflectance ratio greater than 50%. On the one hand, the greater than 50% reflectance of the transmissive surface ensures the reflection of light and thus ensures the expansion of the beam angle. On the other hand, a certain transmittance ensures that some light can pass through the transmissive surface and be emitted in the light-emitting direction, thereby avoiding the back-reflection uniform light module from generating holes in the light-emitting direction and improving the uniformity of light distribution.

[0021] Another objective of the present invention is to provide a back-reflection uniform light module, a lamp and a backlight source, wherein the transflective surface has a convex surface with a free-form shape to expand the beam range of the first reflection and facilitate more uniform light output.

[0022] Another object of the present invention is to provide a back-reflection uniform light module, a lamp, and a backlight source, wherein the back-reflection uniform light module includes a light source transmission cover, wherein the light source transmission cover is disposed on the light source, and the light from the light source is emitted in the light-emitting direction after being refracted by the light source transmission cover. The light beam angle is expanded based on the refraction of the light by the light source transmission cover, so as to further improve the beam range of the back-reflection uniform light module based on subsequent reflection.

[0023] Another object of the present invention is to provide a back-reflection uniform light module, a lamp and a backlight, wherein the back-reflection uniform light module includes a first and a second transmission cover, wherein the second transmission cover is disposed on the first reflective surface, and the light reflected by the first reflective surface is refracted by the second transmission cover and then emitted. The light beam angle is expanded by the refraction of the light by the second transmission cover to expand the beam range of the second reflection, and the beam range of the back-reflection uniform light module is further improved by subsequent reflections.

[0024] According to one aspect of the present invention, a back-reflection homogenizing module is provided, wherein the back-reflection homogenizing module comprises:

[0025] A light source, wherein the back-reflecting homogenizing module has its light emission direction oriented with the light-emitting surface of the light source; and

[0026] A reflective element is disposed in the light-emitting path of the light source and has a reflective surface protruding toward the light-emitting surface of the light source, so that when the light from the light source is projected onto the reflective surface, it is reflected in the opposite direction to the light emission direction and subsequently reflected and emitted toward the light emission direction.

[0027] In one embodiment, the transparent reverse surface has a convex surface in the shape of a tapered surface.

[0028] In one embodiment, the transparent reverse surface has a convex surface with a tapered shape and a slope of ±20% with an error range greater than 0° and less than or equal to 15°.

[0029] In one embodiment, the structure of the translucent reflector is designed such that when light is incident on the translucent reflector in a direction perpendicular to the plane containing the edge of the translucent reflector, the translucent reflector has an incident angle that decreases in a stepwise manner along the radial direction of the plane containing the edge of the translucent reflector.

[0030] In one embodiment, the transparent reverse surface has a multi-segmented conical convex surface.

[0031] In one embodiment, the translucent surface has a first inclined segment extending from the apex of the cone toward the light-emitting direction, and a second inclined segment extending from the bottom of the first inclined segment to the bottom of the cone, wherein the slope of the first inclined segment is greater than the slope of the second inclined segment, so as to form a multi-segment conical surface shape.

[0032] In one embodiment, the slope of the first inclined segment is 30° within a ±20% error range, and the slope of the second inclined segment is 9° within a ±20% error range.

[0033] In one embodiment, the structure of the translucent reflector is designed such that when light is incident on the translucent reflector in a direction perpendicular to the plane containing the edge of the translucent reflector, the translucent reflector has an incident angle that gradually decreases in the radial direction along the plane containing the edge of the translucent reflector.

[0034] In one embodiment, the transparent reverse side has a convex surface with a freeform shape.

[0035] In one embodiment, the edge of the transparent reverse side is designed as a bevel curving toward the light-emitting surface of the light source.

[0036] In one embodiment, the translucent surface is a translucent surface with a reflection ratio greater than 50%.

[0037] In one embodiment, the reflection ratio of the translucent surface is 70% within an error range of ±20%.

[0038] In one embodiment, the back-reflection uniform light module includes a light source transmission cover, wherein the light source transmission cover is disposed on the light source, and the light from the light source is emitted in the light-emitting direction after being refracted by the light source transmission cover.

[0039] In one embodiment, the back-reflection homogenizing module includes a primary and a secondary transmission shield, wherein the secondary transmission shield is disposed on the first reflective surface, and the light reflected from the first reflective surface is refracted by the secondary transmission shield and then emitted.

[0040] In one embodiment, the secondary transmission cover is groove-shaped and is placed above the light source with its groove bottom facing the light source. The reflective element is the groove bottom of the groove-shaped secondary transmission cover, and the reflective surface is the side of the groove bottom of the secondary transmission cover facing the light source.

[0041] In one embodiment, the light reflected by the transmissive reflector is reflected by a primary and secondary reflector and emitted in the light-emitting direction, wherein the secondary reflector is the side of the mounting plate of the back-reflection uniform light module facing the back-reflection uniform light module.

[0042] According to another aspect of the present invention, the present invention provides a back-reflection uniform light fixture, wherein the back-reflection uniform light fixture comprises:

[0043] One light panel;

[0044] Multiple light sources, wherein the light sources are supported on one side of the lamp panel, and the back-reflecting uniform light fixture has the light-emitting surface of the light source facing the light-emitting direction as the light-emitting direction;

[0045] Multiple reflective elements, wherein the number of reflective elements corresponds to the number of light sources, and they are mounted on the surface of the lamp panel in a one-to-one correspondence with the light sources, positioned in the light-emitting path of the light sources. Each reflective element has a reflective surface convex towards the light-emitting surface of the light source, so that when light from the light source is projected onto the reflective surface, it is reflected back towards the light-emitting direction by the reflective surface and then reflected a second time by the surface of the lamp panel before being emitted in the light-emitting direction; and

[0046] A light emitter cover, wherein the light emitter cover is disposed on the surface of the lamp panel.

[0047] In one embodiment, the reflective element includes at least two support columns extending toward the lamp panel, wherein one end of the support column away from the reflective surface is mounted on that surface of the lamp panel to mount the reflective element onto the lamp panel.

[0048] In one embodiment, the transparent reverse surface is a convex surface in the shape of a cone.

[0049] In one embodiment, the structure of the translucent reflector is designed such that when light is incident on the translucent reflector in a direction perpendicular to the plane containing the edge of the translucent reflector, the translucent reflector has an incident angle that decreases in a stepwise manner along the radial direction of the plane containing the edge of the translucent reflector.

[0050] In one embodiment, the transparent reverse surface is a convex surface with a multi-segmented conical shape.

[0051] In one embodiment, the translucent surface has a first inclined segment extending from the apex of the cone toward the light-emitting direction, and a second inclined segment extending from the bottom of the first inclined segment to the bottom of the cone, wherein the slope of the first inclined segment is greater than the slope of the second inclined segment, so as to form a multi-segment conical surface shape of the translucent surface.

[0052] In one embodiment, the structure of the translucent reflector is designed such that when light is incident on the translucent reflector in a direction perpendicular to the plane containing the edge of the translucent reflector, the translucent reflector has an incident angle that gradually decreases in the radial direction along the plane containing the edge of the translucent reflector.

[0053] In one embodiment, the transparent reverse side has a convex surface with a freeform shape.

[0054] In one embodiment, the edge of the transparent surface is designed as a slope extending toward the light-emitting surface of the light source.

[0055] In one embodiment, the translucent surface is a translucent surface with a reflection ratio greater than 50%.

[0056] According to another aspect of the present invention, the present invention provides a back-reflection uniform light fixture, wherein the back-reflection uniform light fixture comprises:

[0057] A transmission housing, wherein the transmission housing has a transmission back cover and defines a receiving cavity;

[0058] A light source, wherein the light source is housed in the receiving cavity with its emitting surface facing away from the transmission back cover, wherein the back-reflecting uniform light fixture has the emitting surface of the light source facing the light emission direction.

[0059] A reflective element is housed in the receiving cavity in a state where it is disposed in the light-emitting path of the light source, and has a reflective surface protruding toward the light-emitting surface of the light source, so that when the light from the light source is projected onto the reflective surface, it is reflected in the opposite direction to the light emitted by the reflective surface, and the light is further reflected by a corresponding mounting plate on which the back-reflecting uniform light fixture is mounted, so that the light is emitted in the direction of origin.

[0060] According to another aspect of the present invention, the present invention provides a backlight source with back reflection uniform illumination, wherein the backlight source with back reflection uniform illumination comprises:

[0061] A reflective sheet;

[0062] One panel;

[0063] A light source, wherein the light source is disposed between the reflective paper and the panel with its light-emitting surface facing away from the reflective paper, and the light-emitting direction of the backlight source is the direction in which the light-emitting surface of the light source faces.

[0064] A reflective element is disposed between the reflective paper and the panel and located in the light-emitting path of the light source. The reflective element has a reflective surface protruding towards the light-emitting surface of the light source, so that when the light from the light source is projected onto the reflective surface, it is reflected back to the light-emitting direction by the reflective surface and subsequently reflected a second time by the reflective paper and emitted in the light-emitting direction.

[0065] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0066] Figure 1This is a light distribution view of a light-emitting module disclosed in an existing patent.

[0067] Figure 2A This is a schematic diagram of a back-reflection uniform light module according to an embodiment of the present invention.

[0068] Figure 2B and Figure 2C The light distribution curve and irradiance distribution diagram of a bare light source are shown. The light distribution curve is close to a Lambertian shape.

[0069] Figure 2D and Figure 2E The light distribution curve and irradiance distribution diagram of the back-reflection uniform light module according to the above embodiments of the present invention show that the light distribution curve exhibits a typical butterfly-shaped distribution.

[0070] Figure 2F and Figure 2G The above-described back-reflection uniform light module according to the present invention has an optimized light distribution curve and irradiance distribution diagram.

[0071] Figure 3A This is a schematic diagram of the principle structure of the back-reflection uniform light module according to the above embodiment of the present invention.

[0072] Figure 3B This is a cross-sectional schematic diagram of the principle structure of the back-reflection uniform light module according to the above embodiment of the present invention.

[0073] Figure 3C This is a partially enlarged schematic diagram of the back-reflection uniform light module according to the above embodiments of the present invention.

[0074] Figure 4 This is a schematic diagram of the back-reflection uniform light module according to the above embodiment of the present invention.

[0075] Figure 5 This is a schematic diagram of the structure of a transflective component of the back-reflection uniform light module according to the above embodiment of the present invention.

[0076] Figure 6 This is a schematic diagram of a modified structure of the reflective element of the back-reflection uniform light module according to the above embodiment of the present invention.

[0077] Figures 7A to 7C This is a schematic diagram of another modified structure of the reflective element of the back-reflection uniform light module according to the above embodiment of the present invention.

[0078] Figure 7D and Figure 7E The light distribution curve and irradiance distribution diagram are obtained for the back-reflection uniform light module according to the above embodiments of the present invention using another modified structure of the transflective element.

[0079] Figure 8A This is a schematic diagram of another modified structure of the reflective element of the back-reflection uniform light module according to the above embodiment of the present invention.

[0080] Figure 8B This is a cross-sectional schematic diagram of yet another modified structure of the transflective element of the back-reflecting uniform light module according to the above embodiments of the present invention.

[0081] Figure 8C This is an enlarged schematic diagram of another modified structure of the transflective element of the back-reflecting uniform light module according to the above embodiment of the present invention.

[0082] Figure 9A This is a schematic diagram of a modified structure of the back-reflection uniform light module according to the above embodiment of the present invention.

[0083] Figure 9B This is a cross-sectional schematic diagram of the modified structure of the back-reflection uniform light module according to the above embodiment of the present invention.

[0084] Figure 10A This is a partial structural deformation diagram of the back-reflection uniform light module according to the above embodiment of the present invention.

[0085] Figure 10B This is a partial structural deformation diagram of the back-reflection uniform light module according to the above embodiment of the present invention.

[0086] Figure 10C This is a partial structural deformation diagram of the back-reflection uniform light module according to the above embodiment of the present invention.

[0087] Figure 11A This is a schematic diagram showing the disassembled structure of a back-reflecting uniform light fixture according to the above embodiment of the present invention.

[0088] Figure 11B This is a cross-sectional structural diagram of the back-reflecting uniform light fixture according to the above embodiment of the present invention.

[0089] Figure 11C This is a partial enlarged schematic diagram of the back-reflecting uniform light fixture according to the above embodiment of the present invention.

[0090] Figure 12A This is a schematic diagram of another back-reflecting uniform light fixture according to the above embodiment of the present invention.

[0091] Figure 12B This is a schematic diagram of the beam distribution formed by another back-reflecting uniform light fixture according to the above embodiment of the present invention.

[0092] Figure 12CThis is a schematic diagram of another back-reflecting uniform light fixture according to the above embodiment of the present invention from another perspective.

[0093] Figure 12D This is a partial enlarged schematic diagram of another back-reflecting uniform light fixture according to the above embodiment of the present invention. Detailed Implementation

[0094] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0095] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0096] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0097] Referring to the accompanying drawings of this invention Figure 2AThe present invention illustrates the beam amplification principle of a back-reflection homogenizing module. The back-reflection homogenizing module includes a light source 10, a transmissive-reflective surface 20, and a secondary reflective surface 30. The transmissive-reflective surface 20 faces the light-emitting surface of the light source 10 and is positioned opposite to the light source 10. The secondary reflective surface 30 faces the transmissive-reflective surface 20 and is positioned opposite to the transmissive-reflective surface 20. The back-reflection homogenizing module emits light in the direction of the light-emitting surface of the light source 10. The light from the light source 10 is projected onto the transmissive-reflective surface 20 and reflected by the transmissive-reflective surface 20 towards the secondary reflective surface 30. Based on the first reflection, the beam range is amplified. The light reflected by the transflective surface 20 is reflected by the secondary reflective surface 30 and emitted in the light-emitting direction, so as to further expand the beam angle and optimize the beam uniformity based on the second reflection. As shown in the figure, the coverage area of ​​the beam formed by the light source 10 is an original coverage area 100 with a diameter of D1. The coverage area of ​​the beam after two reflections is a large-angle coverage area 200 with a diameter of D2. Through the frontal reflection of the light in the light path, the beam coverage area is expanded, and the size of the back-reflection uniform light module in the light-emitting direction can be effectively controlled.

[0098] refer to Figure 2B and Figure 2C As shown, the beam angle of the bare light source 10 is about 107°, and the light distribution curve of the bare light source 10 is close to the Lambertian shape. On the one hand, the beam coverage is small, and on the other hand, the light irradiance is concentrated in the central area, while the irradiance in the surrounding area decreases sharply, resulting in uneven light output.

[0099] refer to Figure 2D and Figure 2E As shown, after processing according to the above principle of the present invention, the light distribution curve of the back-reflection uniform light module is distributed in a typical butterfly shape. On the one hand, the large-angle coverage area 200 formed by the back-reflection uniform light module has a large coverage range, and the beam angle is extended to about 134°. The light in the central area is reflected and projected to the surrounding area, and the light irradiance in the surrounding area is high. This effectively avoids the irradiance from being concentrated in the central area. While expanding the coverage range, it also helps to achieve uniform lighting and improve the lighting effect.

[0100] It is worth mentioning that the translucent surface 20 has both reflective and transmissive properties for light. That is, part of the light from the light source 10 is reflected by the translucent surface 20, and part passes through the translucent surface 20 and exits. (Refer to...) Figure 2F and Figure 2GAs shown, the reflection of light by the translucent surface 20 can form a large-angle coverage area 200 with a larger diameter than the original coverage area 100. Simultaneously, the refraction of light by the translucent surface 20 can prevent a dark area from appearing in the center of the large-angle coverage area 200. Furthermore, compared to… Figure 2B and Figure 2F It can be seen that, in Figure 2B In this context, the light emitted by a bare light source is concentrated in the central region, resulting in high irradiance at the center and low irradiance in the surrounding area. Figure 2F In this system, the light density in the surrounding area is increased by reflecting light through the translucent surface 20, while the light density in the central area is reduced. This results in the light in the central area being weaker than the light in the surrounding area. In specific applications of the back-reflection uniform light module, such as ceiling lights, the distance from the back-reflection uniform light module to the ground increases radially from the central area to the surrounding area. The greater the distance, the greater the light loss. Therefore, the fact that the light in the central area is weaker than the light in the surrounding area is beneficial because stronger light travels a longer distance while weaker light travels a shorter distance. This is beneficial for achieving uniform irradiance in actual visual effects and improving the visual experience.

[0101] Preferably, the reflective surface 20 is a reflective surface with a reflection ratio greater than 50%. On the one hand, the reflectivity of the reflective surface 20 is greater than 50%, which ensures the reflection of light and thus ensures the expansion of the beam angle. On the other hand, based on a certain transmittance, it ensures that some light can pass through the reflective surface 20 and be emitted in the light-emitting direction, thereby avoiding the back-reflection uniform light module from generating holes in the light-emitting direction and improving the uniformity of light distribution.

[0102] Specifically, in this embodiment of the present invention, the reflection ratio of the translucent-reflective surface 20 is 70% within an error range of ±20%, so as to ensure the intensity of the light reflected by the translucent-reflective surface 20 based on the large reflectivity, thereby ensuring a large range of light irradiance. Based on a certain proportion of transmission, it avoids the formation of holes due to the obstruction of the translucent-reflective surface 20 in the light-emitting direction, improves the aesthetics, and integrates the center and surrounding irradiance of the illumination coverage area formed by the back reflection uniform light module, thereby improving the uniformity of irradiance.

[0103] refer to Figures 3A to 3CAs shown, the principle structure of the back-reflection uniform light module is illustrated. The back-reflection uniform light module includes a transflective element 21, which is disposed in the light emission path of the light source 10 and has a transflective surface 20 facing the light emission surface of the light source 10. The back-reflection uniform light module takes the light emission surface of the light source 10 as the light emission direction. In specific applications, a secondary reflector 31 supporting a secondary reflection surface 30 and a light emission surface 40 can be provided. The light source 10 and the transflective element 21 are disposed between the secondary reflector 31 and the light emission surface 40. In specific implementations, the secondary reflector 31 can be a lamp board supporting the light source 10, a ceiling for mounting the back-reflection uniform light module, a PE reflector, etc. This eliminates the need for a dedicated reflective structure for forming a second reflection, thereby simplifying the structure of the back-reflection uniform light module and reducing its cost.

[0104] In particular, the transflective surface 20 is a convex surface protruding towards the light-emitting surface of the light source 10, such as a conical surface or a curved surface, so that the reflection angle can be increased based on the convex reflective surface, thereby increasing the beam range of the first reflection and expanding the light spot of the first reflection.

[0105] Specifically, in this embodiment of the present invention, the transmissive surface 20 has a convex surface in the shape of a cone, which can increase the range of the first reflected light beam and the area of ​​the first reflected light spot, and then project a larger light beam area in the direction away from the light-emitting direction, so as to further increase the range of the light beam emitted from the light-emitting surface 40.

[0106] Preferably, the transparent reverse surface 20 has a convex surface in the shape of a multi-segmented conical surface composed of inclined surfaces with different slopes, such as... Figure 3C As shown, the reflective surface 20 forms different reflection angles based on slopes of varying inclinations, which is beneficial for expanding the emitted beam angle. Figure 2B It is known that the light from the light source 10 has the characteristic of being strong in the center and weak around the periphery. Based on the multi-segment conical design of the transmissive surface 20, the light with stronger central intensity is reflected to a more distant area, which helps to improve the uniformity of the irradiance of the beam emitted from the light-emitting surface 40.

[0107] refer to Figure 4An implementable structure of the back-reflection uniform light module is illustrated, wherein the secondary reflector 31 is a PCB board, and the secondary reflective surface 30 is formed by coating the side of the PCB board 31 that carries the light source 10 with high-reflectivity solder resist. The transflector 21 further includes at least two support columns 22 extending in a direction away from the light emission direction. The end of the support column 22 away from the transflector 20 is mounted on the PCB board that carries the light source 10, thereby mounting the transflector 21 on the PCB board.

[0108] It is worth mentioning that the transparent reflective element 21 can be composed of one or more of polymethyl methacrylate (PMMA), polycarbonate (PC), glass, silicone resin, epoxy resin, PE, and various plastic substrates coated with highly reflective materials, and the transparent reflective surface 20 is formed by a coating on the surface of the transparent reflective element 21.

[0109] Specifically, the transflective surface 20 has a conical surface with a slope greater than 0° and less than or equal to 15° within an error range of ±20%, thereby increasing the beam range and the spot area of ​​the first reflection, and thus reflecting the beam towards the secondary reflecting surface 30 with a larger beam area. See [reference needed] for details. Figure 5 The reflective surface 20 has a convex surface that protrudes from the conical shape of the reflective element 21, and the slope of the reflective surface 20 is 9° within an error range of ±20%, thereby increasing the reflection distance of light and facilitating the control of the thickness of the reflective element 21.

[0110] Furthermore, the structural design of the transflective surface 20 satisfies the following: when light is incident on the transflective surface 20 in a direction perpendicular to the plane containing the edge of the transflective surface 20, the transflective surface 20 has an incident angle that decreases in a stepwise manner in the radial direction along the plane containing the edge of the transflective surface 20, which is beneficial for reflecting the light with higher intensity in the central region of the bare light source to a greater distance and optimizing the uniformity of light.

[0111] For details, please refer to the following: Figure 6The reflective surface 20 has a convex surface protruding from the reflective element 21 in a multi-segmented conical shape. Specifically, the reflective surface 20 has a first inclined segment 201 extending from the apex of the cone towards the light emission direction, and a second inclined segment 202 extending from the bottom of the first inclined segment 201 to the bottom of the cone. The slope of the first inclined segment 201 is greater than the slope of the second inclined segment 202, forming the multi-segmented conical shape of the reflective surface 20. Based on the multi-segmented conical design with a higher central slope and overlapping slopes around the perimeter, the uniformity of irradiance is improved. In this embodiment of the invention, the slope of the first inclined segment 201 is 30° within a ±20% error range, and the slope of the second inclined segment 202 is 9° within a ±20% error range, thereby improving the uniformity of irradiance of the back-reflection homogenizing module based on the multi-segmented conical surface.

[0112] Further reference Figures 7A to 7E The transflective surface 20 is a multi-segmented inclined surface. Its irregular structure helps to avoid total internal reflection, and it is based on... Figure 7D and Figure 7E As shown, on the spherical surface, the radiation intensity gradually increases from the center with the increase of the angle, thus obtaining a more uniform radiation distribution on the plane, which is conducive to achieving more uniform light output and increasing the beam angle.

[0113] Furthermore, the structural design of the transflective surface 20 satisfies the following: when light is incident on the transflective surface 20 in a direction perpendicular to the plane containing the edge of the transflective surface 20, the transflective surface 20 has an incident angle that gradually decreases in the radial direction along the plane containing the edge of the transflective surface 20, which is beneficial to achieving a more uniform light output effect. For example, the transflective surface 20 has a convex surface with a free-form shape to expand the range of the first reflected beam and to achieve a more uniform light output.

[0114] Specifically, refer to Figure 8A and Figure 8B The edge of the translucent reflective surface 20 is designed as a bevel curving toward the secondary reflective surface 30, forming a protrusion along 203, which can effectively reflect light from the side and reduce light in the axial direction perpendicular to the back-reflective uniform light module.

[0115] It is worth mentioning that, corresponding to Figure 8A and Figure 8B The transparent reflective element 21 shown has a transparent reflective surface 20 having a convex surface that protrudes from the tapered shape of the transparent reflective element 21 with an angle of 7° within an error range of ±20%.

[0116] Specifically, to further improve the beam angle of the back-reflection homogenizing module, the back-reflection homogenizing module further refracts the light, specifically, referring to...Figure 9A and Figure 9B The back-reflection homogenizing module further includes a light source transmission cover 50, which covers the light source 10. The light from the light source 10 is refracted by the light source transmission cover 50 and emitted in the light-emitting direction. The light beam angle is expanded by the refraction of the light by the light source transmission cover 50, so as to further improve the beam range of the back-reflection homogenizing module based on subsequent reflection.

[0117] Furthermore, the back-reflection homogenizing module further includes a primary and secondary transmission cover 60, wherein the secondary transmission cover 60 is disposed on the first reflective surface 20, and the light reflected by the first reflective surface 20 is refracted by the secondary transmission cover 60 and then emitted. Based on the refraction of the light by the secondary transmission cover 60, the beam angle is expanded to expand the beam range of the second reflection, and the beam range of the back-reflection homogenizing module is further improved based on the subsequent reflection.

[0118] It is worth mentioning that the secondary transmission cover 60 can be implemented in a groove shape and placed above the light source 10 with its groove bottom facing the light source 10. The transparent and reflective surface 20 is the groove bottom of the groove-shaped secondary transmission cover 60, thereby simplifying the structure of the back reflection uniform light module.

[0119] Further, refer to Figures 10A to 10C As shown, some possible configurations of the secondary transmission shield 60 are illustrated, corresponding to Figure 10A The secondary transmission cover 60 has a diameter that gradually increases along the light emission direction, corresponding to... Figure 10B The secondary transmission cover 60 has a diameter that gradually increases and then becomes fixed along the light emission direction, corresponding to... Figure 10C The secondary transmission cover 60 has a diameter that is first fixed and then gradually increases along the light emission direction, and different refraction effects are achieved based on different structures.

[0120] In summary, the back-reflection uniform light module can achieve uniform large-angle light output with a small axial dimension. Therefore, in practical implementation, the back-reflection uniform light module is suitable for various scenarios such as direct-lit lamps, LCD backlight modules, advertising light boxes, and spatial lighting in large living rooms and conference rooms, and also has aesthetic advantages.

[0121] refer to Figures 11A to 11C and Figure 4As shown, a back-reflecting uniform light fixture 1000 designed according to the above-described embodiment of the present invention is illustrated. In the back-reflecting uniform light fixture 1000, the secondary reflector 31 is implemented as a lamp panel. The back-reflecting uniform light fixture includes the lamp panel, a plurality of light sources 10, a plurality of reflective elements 21, and a housing. The housing has a bottom cover 1100 and a light-emitting cover 1200. The lamp panel is installed on the bottom cover 1100 and located between the bottom cover 1100 and the light-emitting cover 1200, and is covered by the light-emitting cover 1200. The light sources 10 are supported on one side of the lamp panel. The light-emitting direction of the light source is the light-emitting surface of the reflective uniform light fixture. The number of the reflective elements 21 corresponds to the number of the light sources 10, and they are mounted on the surface of the lamp panel in a one-to-one correspondence with the light sources 10, and are arranged in the light-emitting path of the light sources 10. The reflective element 21 has a reflective surface 20 that protrudes towards the light-emitting surface of the light source 10. The light from the light source 10 is projected onto the reflective surface 20 and reflected by the reflective surface 20 to the surface of the lamp panel. The surface of the lamp panel further reflects the light so that the light is emitted toward the light-emitting cover 1200. The surface of the lamp panel is then used as the secondary reflective surface 30.

[0122] It is worth mentioning that the transparent and reflective surface 20 is a transparent and reflective surface with a reflection ratio of more than 50%. Part of the light from the light source 10 is reflected by the transparent and reflective surface 20 toward the secondary reflective surface 30, and part of the light is refracted by the transparent and reflective surface 20 and emitted from the light-emitting cover 1200. The light board is an aluminum-based PCB with a side of the light source 10 covered with high-reflectivity solder resist white oil (such as TDS_PSR-4000_LEW7S). The bottom cover 1100 is made of metal.

[0123] Furthermore, refer to the accompanying drawings of the specification of this invention. Figures 12A to 12D as well as Figure 4A back-reflection uniform light fixture 2000, designed according to the above-described embodiments of the present invention, which facilitates secondary reflection by a mounting plate, is illustrated. The back-reflection uniform light fixture 2000 includes a transmission housing, a light source 10, and a reflective element 21. The transmission housing has a transmission back cover 2100 and defines a receiving cavity. The light source 10 is housed in the receiving cavity with its emitting surface facing away from the transmission back cover 2100. The back-reflection uniform light fixture 2000 emits light in the direction of the emitting surface of the light source 10. The reflective element 21... 1 is housed in the receiving cavity in a state where it is positioned in the light emission path of the light source 10, and has a translucent-reflective surface 20 protruding toward the light emission surface of the light source 10, wherein the light from the light source 10 is projected onto the translucent-reflective surface 20 and reflected by the translucent-reflective surface 20 and emitted from the transmissive back cover 2100, and further reflected by the corresponding mounting plate on which the back-reflective uniform light fixture 2000 is mounted so that the light is emitted toward the light emission surface of the light source 10, thereby relying on the side of the mounting plate facing the back-reflective uniform light fixture 2000 as the secondary reflective surface 30.

[0124] Furthermore, the transmission housing includes a lamp cover 2200 mounted on the lower end of the transmission back cover 2100. The reflective surface 20 is a convex surface protruding from the lamp cover 2200 towards the transmission back cover 2100. Therefore, the lamp cover 2200 can also be understood as constituting the reflective element 21. The reflective surface 20 is a reflective surface, where a portion of the light from the light source 10 is reflected by the reflective surface 20 towards the secondary reflecting surface 30, and a portion is refracted by the reflective surface 20 to exit through the lamp cover 2200. It is worth mentioning that in some embodiments, the reflective surface 20 can also be a total reflection surface, and a light source can be positioned below the lamp cover 2200 to avoid dark areas.

[0125] It is worth mentioning that the back-reflecting uniform light fixture 2000 has multiple light sources 10, and the multiple light sources 10 are carried on the same light panel and face the transparent and reflective surface 20 together, that is, the multiple light sources 10 are used for the same transparent and reflective surface 20.

[0126] In particular, the present invention also provides a back-reflective uniform backlight source for use in LCD backlights and advertising light boxes, combined with Figure 4The backlight source with back reflection uniform light includes a reflective paper, a panel, a light source 10, and a reflective element 21. The light source 10 is disposed between the reflective paper and the panel with its light-emitting surface facing away from the reflective paper. The light emission direction of the backlight source with the light-emitting surface of the light source 10 is the direction of light emission. The reflective element 21 is disposed between the reflective paper and the panel and is located in the light emission path of the light source 10. The reflective element 21 has a reflective surface 20 protruding towards the light-emitting surface of the light source 10. When the light from the light source 10 is projected onto the reflective surface 20, it is reflected in the opposite direction to the light emission direction by the reflective surface 20, and then reflected a second time by the reflective paper and emitted in the light emission direction. The reflective paper is used as the secondary reflective surface 30.

[0127] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0128] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A back-reflection uniform light module, characterized in that, Comprising: a light source, wherein the back-reflection uniform light module has a light emitting surface of the light source facing a light emitting direction; and a trans-reflector, wherein the trans-reflector is disposed in a light emitting path of the light source and has a trans-reflector surface protruding towards the light emitting surface of the light source, such that when light of the light source is projected onto the trans-reflector surface, the light is back-reflected by the trans-reflector surface towards the light emitting direction.

2. The back-reflection uniform light module of claim 1, wherein the trans-reflector surface has a convex surface with a conical surface shape.

3. The back-reflection uniform light module of claim 2, wherein the convex surface with the conical surface shape has a slope within an error range of ±20% greater than 0° and less than or equal to 15°.

4. The back-reflection uniform light module of claim 1, wherein the trans-reflector surface is designed to have a stepwise decreasing incident angle along a radial direction of a plane in which an edge of the trans-reflector surface is located when light is incident onto the trans-reflector surface in a direction perpendicular to the plane.

5. The back-reflection uniform light module of claim 4, wherein the trans-reflector surface has a convex surface with a multi-segment conical surface shape.

6. The back-reflection uniform light module of claim 5, wherein the trans-reflector surface has a first inclined segment extending from a top of the conical surface towards the light emitting direction, and a second inclined segment extending from a bottom end of the first inclined segment to a bottom of the conical surface, wherein the first inclined segment has a slope greater than a slope of the second inclined segment to form the multi-segment conical surface shape.

7. The back-reflection uniform light module of claim 8, wherein the slope of the first inclined segment is 30° within an error range of ±20%, and the slope of the second inclined segment is 9° within an error range of ±20%.

8. The back-reflection uniform light module of claim 4, wherein the trans-reflector surface is designed to have a gradually decreasing incident angle along a radial direction of a plane in which an edge of the trans-reflector surface is located when light is incident onto the trans-reflector surface in a direction perpendicular to the plane.

9. The back-reflection uniform light module of claim 8, wherein the trans-reflector surface has a convex surface with a free-form surface shape.

10. The back-reflection uniform light module of any one of claims 1 to 9, wherein an edge of the trans-reflector surface is designed as an inclined surface extending towards the light emitting surface of the light source.

11. The back-reflection uniform light module of any one of claims 1 to 9, wherein the trans-reflector surface is a trans-reflector surface with a reflection ratio greater than 50%.

12. The back-reflection uniform light module of claim 11, wherein the reflection ratio of the trans-reflector surface is 70% within an error range of ±20%.

13. The back-reflection uniform light module of any one of claims 1 to 9, comprising a light source transmissive cover, wherein the light source transmissive cover covers the light source, and light of the light source is emitted towards the light emitting direction after being refracted by the light source transmissive cover.

14. The back-reflection light uniformity module of claim 13, wherein the back-reflection light uniformity module comprises a secondary transmission cover, wherein the secondary transmission cover is disposed on the first reflective surface, and light reflected by the first reflective surface is emitted through refraction of the secondary transmission cover.

15. The back-reflection light uniformity module of claim 14, wherein the secondary transmission cover is in a groove shape, and is disposed above the light source with a groove bottom of the secondary transmission cover facing the light source, wherein the transmission-reflection component is the groove bottom of the secondary transmission cover in the groove shape, and the transmission-reflection surface is a surface of the groove bottom of the secondary transmission cover facing the light source.

16. The back-reflection light uniformity module of any one of claims 1 to 9, wherein light reflected by the transmission-reflection surface is reflected by a secondary reflection surface toward the light emission direction, wherein the secondary reflection surface is a surface of a mounting plate of the back-reflection light uniformity module facing the back-reflection light uniformity module.

17. A back-reflection homogenizing luminaire, characterized by including: a light plate; a plurality of light sources, wherein the light sources are carried on a surface of the light plate, and the light emission direction is toward a light emission surface of the light sources; a plurality of transmission-reflection components, wherein the number of the transmission-reflection components corresponds to the number of the light sources, and the transmission-reflection components are disposed on the surface of the light plate in a one-to-one correspondence with the light sources in a light emission path of the light sources, wherein the transmission-reflection components have a transmission-reflection surface protruding toward the light emission surface of the light sources, so that when light of the light sources is incident on the transmission-reflection surface, the light is reflected by the transmission-reflection surface in a direction opposite to the light emission direction, and is reflected by the surface of the light plate toward the light emission direction; and a light emission cover, wherein the light emission cover is disposed on the surface of the light plate.

18. The back-reflection light uniformity lamp of claim 17, wherein the transmission-reflection component comprises at least two support columns extending toward the light plate, wherein an end of the support columns away from the transmission-reflection surface is mounted on the surface of the light plate to support the transmission-reflection component on the light plate.

19. The back-reflection light uniformity lamp of claim 17, wherein the transmission-reflection surface is a convex surface in a conical surface shape.

20. The back-reflection light uniformity lamp of claim 17, wherein the transmission-reflection surface is designed to have a stepwise decreasing incident angle in a radial direction of a plane in which an edge of the transmission-reflection surface lies when light is incident on the transmission-reflection surface in a direction perpendicular to the plane.

21. The back-reflection light uniformity lamp of claim 20, wherein the transmission-reflection surface is a convex surface in a multi-segment conical surface shape.

22. The back-reflection light uniformity lamp of claim 21, wherein the transmission-reflection surface has a first inclined segment extending from a tip of the conical surface toward the light emission direction, and a second inclined segment extending from a bottom end of the first inclined segment to a bottom of the conical surface, wherein a slope of the first inclined segment is greater than a slope of the second inclined segment to form the multi-segment conical surface shape of the transmission-reflection surface.

23. The back-reflection uniform light lamp of claim 17, wherein the structure of the trans-reflector is designed to have a gradually decreasing incident angle in a radial direction of the plane where the edge of the trans-reflector is located when a light ray is incident on the trans-reflector in a direction perpendicular to the plane.

24. The back-reflection uniform light module of claim 23, wherein the trans-reflector has a convex surface with a free-form surface shape.

25. The back-reflection uniform light lamp of any one of claims 17 to 24, wherein the edge of the trans-reflector is designed as an inclined surface extending towards the light emitting surface of the light source.

26. The back-reflection uniform light module of any one of claims 17 to 24, wherein the trans-reflector is a trans-reflector with a reflection ratio greater than 50%.

27. A back-reflection homogenizing light fixture, characterized by Comprising: a transmissive housing, wherein the transmissive housing has a transmissive back cover and defines a receiving cavity; a light source, wherein the light source is received in the receiving cavity with its light emitting surface facing away from the transmissive back cover, wherein the back-reflection uniform light lamp has the light emitting surface of the light source facing as a light emitting direction; a trans-reflector, wherein the trans-reflector is received in the receiving cavity with its trans-reflector surface being disposed in the light emitting path of the light source and protruding towards the light emitting surface of the light source, such that when the light ray of the light source is projected onto the trans-reflector surface, the light ray is back-reflected by the trans-reflector surface away from the light emitting direction and further reflected by a corresponding mounting panel on which the back-reflection uniform light lamp is mounted to emit towards the light emitting direction.

28. A back-reflection uniform backlight, characterized by, Comprising: a reflective paper; a panel; a light source, wherein the light source is disposed between the reflective paper and the panel with its light emitting surface facing away from the reflective paper, wherein the back-reflection uniform light lamp has the light emitting surface of the light source facing as a light emitting direction; a trans-reflector, wherein the trans-reflector is disposed between the reflective paper and the panel and located in the light emitting path of the light source, wherein the trans-reflector has a trans-reflector surface protruding towards the light emitting surface of the light source, such that when the light ray of the light source is projected onto the trans-reflector surface, the light ray is back-reflected by the trans-reflector surface away from the light emitting direction and further reflected by the reflective paper to emit towards the light emitting direction.

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