Lamp holder

Abstract

The invention relates to the field of lighting equipment, and provides a lamp holder. The lamp holder comprises a lamp shell, a lamp cover and a lamp cover, wherein the lamp shell is provided with a groove with a light outlet; the first light guide plate, the light control film and the second light guide plate are sequentially stacked in the direction from the bottom of the groove to the light outlet; the first light guide plate and the second light guide plate are respectively provided with a first surface and a second surface opposite to each other and a peripheral side surface connecting the first surface and the second surface; the first light source is arranged on the peripheral side surface of the first light guide plate; the second light source is arranged on the peripheral side surface of the second light guide plate; wherein the surface of the light control film is provided with a third microstructure surface, and the third microstructure surface can reduce the angle of emergent light from the first light guide plate to the light control film. According to the lamp holder, the first light source and the second light source can be electrically controlled to be turned on or turned off, so that the size of light spots projected by the lamp and the size of an illumination area can be adjusted, and different requirements of various illumination application scenes are met.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting devices, and particularly to a lamp cap. Background Art

[0002] In people's work and life, various lighting fixtures can be seen everywhere. Under different application scenarios, there are also differences in the requirements for lighting fixtures. Taking a table lamp as an example, when performing reading and writing operations, a large illumination area with high illumination uniformity is required; when performing focused and detailed operations, a small illumination area with low glare, comfort, and high brightness is required. Currently, the illumination area of lamps is usually fixed, which cannot meet the application requirements of different scenarios and has poor versatility. Therefore, there is an urgent need to provide a lighting fixture that simultaneously has lighting functions with different illumination areas to achieve the switching of different illumination areas. Summary of the Invention

[0003] The present invention provides a lamp cap to solve the problem that the illumination area of existing lamps is fixed and cannot meet the application requirements of different scenarios.

[0004] The present invention provides a lamp cap, including:

[0005] A lamp housing, the lamp housing is provided with a groove having a light outlet;

[0006] A first light guide plate, a light control film, and a second light guide plate that are sequentially stacked from the bottom of the groove towards the light outlet direction; both the first light guide plate and the second light guide plate have a first surface and a second surface facing away from each other and a peripheral side surface connecting the first surface and the second surface;

[0007] A first light source, disposed on the peripheral side surface of the first light guide plate;

[0008] A second light source, disposed on the peripheral side surface of the second light guide plate;

[0009] Wherein, a third micro-structured surface is provided on the surface of the light control film, and the third micro-structured surface can reduce the outgoing light angle of the light incident from the first light guide plate to the light control film.

[0010] Optionally, the lamp cap further includes: a reflector, and the reflector is provided at the bottom of the groove.

[0011] Optionally, a second micro-structured surface is provided on the first surface of the second light guide plate close to the light control film; the second micro-structured surface increases the outgoing light angle of the light incident from the second light source to the second light guide plate.

[0012] Optionally, a second micro-structured surface is provided on the first surface of the second light guide plate close to the light control film, and the second micro-structured surface can totally reflect the light rays emitted from the second light source to the first surface of the second light guide plate.

[0013] Optionally, a first microstructure surface is provided on the first surface of the first light guide plate close to the light control film, and the first microstructure surface can homogenize the light emitted from the first light guide plate.

[0014] Optionally, a first microstructure surface is provided on the first surface of the first light guide plate close to the light control film, and the first microstructure surface can increase the light emission angle of the light incident on the first light guide plate from the first light source.

[0015] Optionally, a first microstructure surface is provided on the first surface of the first light guide plate close to the light control film. The first microstructure surface is provided with a first microstructure region and a second microstructure region. The first microstructure region is provided with a plurality of first protrusions, and the second microstructure region is provided with a plurality of second protrusions. The transmittance of the first microstructure region is less than that of the second microstructure region.

[0016] Optionally, a plurality of second microstructure protrusions are provided on the second microstructure surface, and a plurality of third microstructure protrusions are provided on the third microstructure surface. The surfaces of the second microstructure protrusions and the third microstructure protrusions are free-form surfaces; the size of the second microstructure protrusions in the plane direction of the second light guide plate and the size of the third microstructure protrusions in the plane direction of the light control film are less than 80 μm.

[0017] Optionally, the light control film and the second light guide plate are integrally formed; alternatively, the light control film is attached to the second light guide plate.

[0018] Optionally, the thickness of the light control film is 0.2 - 1 mm; and / or, the thicknesses of the first light guide plate and the second light guide plate are 2 - 5 mm

[0019] The lamp head provided by the present invention stacks a first light guide plate, a light control film, and a second light guide plate in sequence from the bottom of the groove of the lamp housing towards the light outlet. The first light source is arranged on the circumferential side surface of the first light guide plate, and the second light source is arranged on the circumferential side surface of the second light guide plate. A third microstructure surface is provided on the light control film, and the third microstructure surface is used to reduce the light emission angle of the light emitted from the first light guide plate, so that the lamp head can adjust the projected light spot and the size of the illumination area of the lamp head by electrically controlling the lighting or turning off of the first light source and the second light source to meet the different requirements of various lighting application scenarios. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is an exploded structural schematic diagram of the lamp head provided by the present invention;

[0022] Figure 2 is a stacked structural schematic diagram of the lamp head provided by the present invention;

[0023] Figure 3 is the light distribution curve of the light control film of the lamp head provided by the present invention;

[0024] Figure 4 is the light distribution curve of the second light guide plate of the lamp head provided by the present invention;

[0025] Figure 5 is a schematic diagram of the first microstructured surface on the first light guide plate of the lamp head provided by the present invention;

[0026] Figure 6 is the optical path schematic diagram of the first light guide plate of the lamp head provided by the present invention;

[0027] Reference numerals:

[0028] 1. First light guide plate; 11. First coating layer; 111. First microstructured area; 1111. First sub-area; 112. Second microstructured area; 1121. Second sub-area; 113. Third microstructured area; 2. Second light guide plate; 201. First surface; 202. Second surface; 203. Peripheral side surface; 21. Second coating layer; 3. Light control film; 4. Reflective sheet; 5. First light source; 6. Second light source. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of this embodiment clearer, the following will clearly and completely describe the technical solutions in this embodiment with reference to the drawings in this embodiment. Obviously, the described embodiments are some, but not all, of the embodiments of this embodiment. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this embodiment without creative efforts fall within the scope of protection of this embodiment.

[0030] In the description of the embodiments, it should be noted that unless otherwise clearly specified and limited, the terms "first", "second", "third", and "fourth" are used for numbering the product components for the purpose of clear description and do not represent any substantial difference. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances. In addition, the meaning of "a plurality" is two or more. In the specification and claims, "and / or" means at least one of the connected objects. The character " / ", generally represents an "or" relationship between the associated objects before and after.

[0031] In the description of this embodiment, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The following combines Figures 1 to 6 to describe the lamp holder of this embodiment.

[0033] As Figure 1 and Figure 2 shown, the lamp holder provided in this embodiment includes: a lamp housing (not shown in the figure), the lamp housing is provided with a groove having a light outlet; a first light guide plate 1, a light control film 3, and a second light guide plate 2 that are sequentially stacked from the bottom of the groove towards the light outlet. Both the first light guide plate 1 and the second light guide plate 2 have a first surface 201 and a second surface 202 facing away from each other and a peripheral side surface 203 connecting the first surface 201 and the second surface 202; a first light source 5 is provided on the peripheral side surface 203 of the first light guide plate 1; a second light source 6 is provided on the peripheral side surface 203 of the second light guide plate 2. Among them, the surface of the light control film 3 is provided with a third microstructured surface, and the third microstructured surface can reduce the outgoing light angle of the light incident from the first light guide plate 1 to the light control film 3.

[0034] Optionally, the first light source 5 and the second light source 6 include a plurality of LED lamps, and the plurality of LED lamps are distributed around the periphery of the corresponding light guide plate and are disposed opposite to the peripheral side surface. For example, both the first light source 5 and the second light source 6 are LED light strips.

[0035] The first light guide plate 1, the light control film 3, and the second light guide plate 2 in this embodiment are all made of light-transmitting materials, such as light-transmitting plastics. The first surface 201 of the first light guide plate 1 and the first surface 201 of the second light guide plate 2 are both the sides facing away from the light outlet, and the second surface 202 of the first light guide plate 1 and the second surface 202 of the second light guide plate 2 are both the sides facing the light outlet.

[0036] The light control film 3 has a third surface facing the first light guide plate 1 and a fourth surface facing the second light guide plate 2. The third microstructured surface can be provided on the third surface or the fourth surface. A plurality of third microstructured protrusions are distributed on the third microstructured surface, and the third microstructured protrusions are used to deflect the light emitted from the first light guide plate 1 towards it in a direction close to the center of the light control film 3, thereby reducing the exit light angle of the light incident from the first light guide plate 1 onto the light control film 3.

[0037] Among them, the light emitted by the first light source 5 enters the first light guide plate 1 from the circumferential side surface 203 of the first light guide plate 1, and after being reflected and refracted by the first light guide plate 1, it is incident on the light control film 3 from the second surface 202 of the first light guide plate 1. The light incident from the first light guide plate 1 onto the light control film 3 is reflected by the third microstructured protrusions in the third microstructured surface and converges towards the center of the light control film 3, so as to enter the second light guide plate 2 from the first surface 201 of the second light guide plate 2 at a smaller exit angle, and then exits from the second surface 202 of the second light guide plate 2. The light emitted by the second light source 6 enters the second light guide plate 2 from the circumferential side surface 203 of the second light guide plate 2, and after being reflected and refracted by the second light guide plate 2, it exits from the second surface 202 of the second light guide plate 2.

[0038] When using this lamp head, when the first light source 5 is lit and the second light source 6 is turned off, due to the control effect of the light control film 3 on the exit light angle, the large-angle light emission is suppressed, and glare-free and comfortable small illumination area focused lighting can be achieved. See Figure 3 the shown light distribution curve. The light incident on the light control film 3 exits at an angle less than 50°, effectively suppressing the emission of large-angle light. It not only controls the uncomfortable large-angle glare, but also enhances the illumination level, achieving efficient energy saving. When the second light source 6 is lit and the first light source 5 is turned off, the obtained illumination area is larger than that when only the first light source 5 is lit. When the first light source 5 and the second light source 6 are lit simultaneously, the obtained illumination area is the same as that when only the second light source 6 is lit. On the basis of these three electric control modes, the light intensity can also be adjusted by adjusting the power of the first light source 5 and the second light source 6 to adjust the size of the illumination area.

[0039] The surface of the third microstructured protrusion in this embodiment is a conical surface, a spherical surface, an ellipsoidal surface or a free-form surface, etc., and this embodiment does not make specific limitations on this. It should be noted that the sizes of different third microstructured protrusions can be the same or different.

[0040] In actual products, the control ability of the light control film 3 on the light exit angle can be adjusted by adjusting the curvature slope of the third microstructured protrusion to achieve different light distribution angles and obtain different spot sizes. This can be understood and implemented by those skilled in the art, and this embodiment does not elaborate in detail. The appropriate light control film 3 can be selected according to actual needs to meet the size requirements of the small illumination threshold spot in different fine operation environments.

[0041] Among them, by reasonably arranging the third micro-structure protrusions on the light control film 3, less light incident on the light control film 3 from the first light guide plate 1 can be emitted from the middle area of the light control film 3, and more light can be emitted from the outer side area of the light control film 3, so that uniform small light spots are presented on the plane illumination surface directly below the lamp head, realizing small illumination area lighting with high illuminance and high uniformity. Refer to Figure 3 the light distribution curve shown.

[0042] The lamp head provided in this embodiment sequentially stacks the first light guide plate 1, the light control film 3, and the second light guide plate 2 from the bottom of the groove of the lamp housing towards the light outlet. The first light source 5 is arranged on the circumferential side surface of the first light guide plate 1, and the second light source 6 is arranged on the circumferential side surface of the second light guide plate 2. A third micro-structure surface is provided on the light control film 3, and the third micro-structure surface is used to reduce the emission angle of the light emitted from the first light guide plate 1, so that the lamp head can adjust the projected light spot and the size of the illumination area of the lamp head by electronically controlling the lighting or turning off of the first light source 5 and the second light source 6 to meet the different requirements of various lighting application scenarios.

[0043] The lamp head provided in this embodiment further includes a reflector 4, and the reflector 4 is provided at the bottom of the groove of the lamp housing.

[0044] In some embodiments, when the first light source 5 is lit, a part of the light incident on the first light guide plate 1 from the first light source 5 will be refracted to the bottom of the groove through the first light guide plate 1; when the second light source 6 is lit, a part of the light incident on the second light guide plate 2 from the second light source 6 will be refracted to the bottom of the groove of the lamp housing through the light control film 3 and the first light guide plate 1. By providing the reflector 4 at the bottom of the groove, at least a part of the light refracted to the bottom of the groove can be reflected back to the first light guide plate 1 through the reflector 4, and then sequentially emitted through the light control film 3 and the second light guide plate 2, thereby reducing the light quantity loss.

[0045] In this embodiment, the first surface 201 of the second light guide plate 2 close to the light control film 3 is provided with a second micro-structure surface. The second micro-structure surface can increase the emission light angle of the light incident on the second light guide plate 2 from the second light source 6. Among them, a plurality of second micro-structure protrusions are distributed on the second micro-structure surface, and the second micro-structure protrusions can deflect the light emitted from the second light source 6 towards it in a direction away from the center of the second light guide plate 2, thereby increasing the emission light angle of the light incident on the second light guide plate 2 from the second light source 6.

[0046] Specifically, the light emitted by the second light source 6 enters the second light guide plate 2 from the circumferential side surface 203 of the second light guide plate 2. A part of the light is directed towards the second microstructure surface on the first surface 201 of the second light guide plate 2. After being reflected by the second microstructure protrusions in the second microstructure surface, it is emitted from the second surface 202 at a set large angle, so that when the second light source 6 is lit, the illumination area obtained is larger than that when only the first light source 5 is lit.

[0047] When the second light guide plate 2 is a common light guide plate, that is, when the second microstructure surface is not provided, ordinary illumination area lighting is realized when the second light source 6 is lit, enabling the lamp head of this embodiment to realize the switching between a small illumination area and an ordinary illumination area. When the second microstructure surface is provided on the second light guide plate 2, large illumination area lighting is realized when the second light source 6 is lit, enabling the lamp head of this embodiment to realize the switching between a small illumination area and a large illumination area.

[0048] It should be noted that the control effect of the second microstructure surface on the outgoing light angle of the light incident on the second light guide plate 2 from the second light source 6 is much greater than its control effect on the outgoing light angle of the light incident on the second light guide plate 2 from the self-control light film 3. When only the first light source 5 is lit, the second light guide plate 2 basically does not change the outgoing light angle of the light incident on the second light guide plate 2 from the self-control light film 3, thus maintaining the small illumination area lighting effect. This can be understood and implemented by those skilled in the art based on the prior art, and this embodiment will not be elaborated in detail.

[0049] Among them, by reasonably arranging the second microstructure protrusions, less light incident on the second light guide plate 2 from the second light source 6 is emitted from the central region of the second light guide plate 2, and more light is emitted from the outer region of the second light guide plate 2, so as to present a more uniform large light spot on the plane illumination plane directly below the lamp head, realizing large illumination area lighting with high uniformity, non-glare, softness, and comfort. Refer to Figure 4 the light distribution curve of the second light guide plate shown. There is no need to provide a traditional diffusion plate on the light-emitting side of the first light guide plate 1, which is beneficial to reducing production costs.

[0050] Furthermore, by reasonably arranging the second microstructure protrusions, even less light incident on the second light guide plate 2 from the second light source 6 is emitted from the central region of the second light guide plate 2, and even more light is emitted from the outer region of the second light guide plate 2. By simultaneously lighting the first light source 5 to compensate for the illuminance of the central region of the light spot, the illuminance uniformity when the first light source 5 and the second light source 6 are lit simultaneously is ensured, realizing large illumination area lighting with uniformity, non-glare, softness, and comfort.

[0051] In some embodiments, a second microstructure surface is provided on a first surface 201 of the second light guide plate 2 close to the light control film 3. The second microstructure surface can totally reflect the light rays emitted from the second light source 6 to the first surface 201 of the second light guide plate 2, that is, the second light guide plate 2 functions as a one-way lens, avoiding the loss of light quantity caused by the light rays incident on the second light guide plate 2 from the first surface 201 being emitted.

[0052] In some other embodiments, the second microstructure surface can increase the exit light angle of the light incident on the second light guide plate 2 from the second light source 6, and totally reflect the light rays emitted from the second light source 6 to the first surface 201 of the second light guide plate 2. That is, the second microstructure protrusion can not only totally reflect the light rays emitted from the second light source 6 to the first surface 201 of the second light guide plate 2, but also deflect the light rays emitted from the second light source 6 to it in a direction away from the center of the second light guide plate 2.

[0053] In some embodiments, a first microstructure surface is provided on a first surface 201 of the first light guide plate 1 close to the light control film 3. The first microstructure surface can homogenize the exit light of the first light guide plate 1.

[0054] Among them, a plurality of microstructure protrusions are distributed on the first microstructure surface. The microstructure protrusions can make the light rays emitted from the first light source 5 to it exit at a set angle. By reasonably arranging the microstructure protrusions, the light rays emitted from the first light source 5 to the first surface 201 of the first light guide plate 1 can be evenly emitted from the first light guide plate 1, and then after being controlled by the light control film 3, they are emitted from the second light guide plate 2, obtaining small illumination area illumination with relatively uniform illuminance.

[0055] When the first microstructure surface is used to homogenize the exit light of the first light guide plate 1, the illuminance of the middle area of the light spot presented on the plane illumination surface directly below the lamp head is still lower than that of the outer area. For products with higher requirements for illuminance uniformity, such as table lamps, the illuminance uniformity of the small illumination area illumination of this lamp head still needs to be improved.

[0056] In response to this, in some other embodiments, a first microstructure surface is provided on a first surface 201 of the first light guide plate 1 close to the light control film 3. The first microstructure surface can increase the exit light angle of the light incident on the first light guide plate 1 from the first light source 5. Among them, a plurality of first microstructure protrusions are distributed on the first microstructure surface. The first microstructure protrusions can deflect the light rays emitted from the first light source 5 to it in a direction away from the center of the first light guide plate 1, thereby increasing the exit light angle of the light incident on the first light guide plate 1 from the first light source 5.

[0057] Specifically, the light emitted by the first light source 5 enters the first light guide plate 1 from the peripheral side surface 203 of the first light guide plate 1. A part of the light is directed towards the first microstructured surface on the first surface 201 of the first light guide plate 1. After being reflected by the first microstructured protrusions in the first microstructured surface, it exits from the second surface 202 at a set large angle.

[0058] Among them, by reasonably arranging the first microstructured protrusions, less light incident on the first light guide plate 1 from the first light source 5 can exit from the central region of the first light guide plate 1, and more light can exit from the outer region of the first light guide plate 1. Then, after being controlled by the light control film 3 and exiting from the second light guide plate 2, a more uniform small light spot can be presented on the plane illumination surface directly below the lamp head, achieving high-illuminance and high-uniformity small illumination area lighting and improving the comfort of users in the small illumination area lighting mode.

[0059] The first microstructured surface in this embodiment is used to increase the exit light angle of the light incident on the first light guide plate 1 from the first light source 5. Compared with the first microstructured surface in the above embodiment for uniforming the exit light of the first light guide plate 1, it can obtain small illumination area lighting with higher illuminance uniformity and meet the requirements of the international standard for the illuminance uniformity of table lamps.

[0060] Of course, when the first microstructured surface is used to uniform the exit light of the first light guide plate 1, the third microstructured protrusions can also be reasonably arranged so that less light incident on the light control film 3 from the first light guide plate 1 exits from the central region of the light control film 3, and more light exits from the outer region of the light control film 3 to improve the illuminance uniformity.

[0061] In some embodiments, the first light guide plate 1 and the second light guide plate 2 are set the same, that is, the first microstructured surface and the second microstructured surface have the same function. The first microstructured surface can increase the exit light angle of the light incident on the first light guide plate 1 from the first light source 5, and the second microstructured surface can increase the exit light angle of the light incident on the second light guide plate 2 from the second light source 6. And the light distribution curve of the first light guide plate 1 is the same as that of the second light guide plate 2, as Figure 4 shown.

[0062] Among them, the first microstructured protrusions and the second microstructured protrusions are conical surfaces, spherical surfaces, ellipsoidal surfaces or free-form surfaces, etc. This embodiment does not make specific limitations on this. The sizes of different first microstructured protrusions can be the same or different. The sizes of different second microstructured protrusions can be the same or different.

[0063] In actual products, the control ability of the first light guide plate 1 and the second light guide plate 2 on the light exit angle can be adjusted by adjusting the surface slopes of the first microstructured protrusions and the second microstructured protrusions. These are all understandable and implementable by those skilled in the art, and this embodiment does not elaborate in detail.

[0064] It should be noted that the first microstructural protrusion, the second microstructural protrusion, and the third microstructural protrusion in the above embodiments can be respectively replaced with a first microstructural depression, a second microstructural depression, and a third microstructural depression, as long as the corresponding light control effects of the first microstructural surface, the second microstructural surface, and the third microstructural surface can be achieved.

[0065] In this embodiment, a first microstructural surface is provided on the first surface 201 of the first light guide plate 1 close to the light control film 3, and the first microstructural surface is provided with a first microstructural region 111 and a second microstructural region 112. As Figure 5 shown, the first microstructural region 111 and the second microstructural region 112 form a microstructural pattern. The first microstructural region 111 is provided with a plurality of first protrusions, and the second microstructural region 112 is provided with a plurality of second protrusions. The transmittance of the first microstructural region 111 is less than the transmittance of the second microstructural region 112.

[0066] Referring to Figure 6 , after the light emitted by the first light source 5 enters the first light guide plate 1 from the peripheral side surface 203 of the first light guide plate 1, a part of the light directly exits the first light guide plate 1 from the second surface 202; a part of the light is reflected by the first surface 201 and then exits the first light guide plate 1 from the second surface 202; and there is also a part of the light refracted from the first surface 201 out of the first light guide plate 1 and enters the space between the first light guide plate 1 and the groove of the lamp housing.

[0067] Among them, most of the light rays emitted by the first light source 5 towards the first protrusions and the second protrusions will be reflected and exit the first light guide plate 1 from the second surface 202, and this part of the light is used for illumination; a small part of the light rays emitted by the first light source 5 towards the first protrusions and the second protrusions are refracted out of the first light guide plate 1 from the first surface 201. A part of the light refracted out of the first light guide plate 1 from the first surface 201 is reflected by the reflector 4 and then re-enters the first light guide plate 1, and then after being controlled by the light control film 3, it exits from the second light guide plate 2, and there is also a part of the light that cannot enter the first light guide plate 1 again.

[0068] Due to the different shapes of the first protrusions and the second protrusions, the light rays refracted out of the first microstructural region 111 and re-entering the first light guide plate 1 are fewer than the light rays refracted out of the second microstructural region 112 and re-entering the first light guide plate 1, so that the first microstructural region 111 and the second microstructural region 112 have different transmittances. In this way, the color at the position corresponding to the first microstructural region 111 on the second surface 202 is darker than the color at the position corresponding to the second microstructural region 112, that is, a pattern composed of two light and dark regions is presented on the second surface 202.

[0069] In an actual product, by adjusting the shapes, distributions, and positional relationships of the first microstructure region 111 and the second microstructure region 112, a design pattern with ornamental value and aesthetic feeling can be presented on the light-emitting surface, while meeting the lighting requirements and the personalized usage needs of consumers. Compared with forming a specific pattern on the light-emitting surface by combining multiple types of light sources to emit light, the lamp structure is simplified in this embodiment, and the production cost is reduced.

[0070] Among them, since most of the light emitted by the first light source 5 is directly reflected by the first protrusion and the second protrusion and then exits from the second surface 202 of the first light guide plate 1, even if the human eye sees different bright and dark area patterns on the second surface 202, it does not affect the normal lighting of the lamp head.

[0071] In this embodiment, at least a part of the first surface 201 of the first light guide plate 1 is provided with the above-mentioned microstructure pattern. For example, the first light guide plate 1 is a circular plate, and the microstructure pattern is distributed on the entire first surface 201, so that the entire light-emitting surface presents a pattern composed of different colors.

[0072] As Figure 5 shown, in this embodiment, the first microstructure region 111 includes a plurality of first sub-regions 1111, and the second microstructure region 112 includes a plurality of second sub-regions 1121. A plurality of second sub-regions 1121 are distributed around each first sub-region 1111.

[0073] It should be noted that being distributed around the first sub-region 1111 means being distributed around the first sub-region 1111 in a circular or partial circular shape. The shapes and sizes of the first sub-region 1111 and the second sub-region 1121 can be the same or different. The shapes and sizes of the plurality of first sub-regions 1111 can be the same or different, and the shapes and sizes of the plurality of second sub-regions 1121 can be the same or different.

[0074] Among them, the first sub-region 1111 and the second sub-region 1121 can be connected to each other or separated from each other. The specific shapes and sizes of each first sub-region 1111 and second sub-region 1121 can be designed according to the pattern effect to be presented on the second surface 202 as needed.

[0075] For example, both the first sub-region 1111 and the second sub-region 1121 are circular. For another example, both the first sub-region 1111 and the second sub-region 1121 are polygons, and the sides of the polygon can be straight sides or arc sides. One second sub-region 1121 is correspondingly arranged on one side of each side of the first sub-region 1111. The polygon can be a triangle, a rectangle, a pentagon, a hexagon, etc. Different polygons can make different pattern effects appear on the second surface 202 of the first light guide plate 1.

[0076] Among them, for the first sub-region 1111 spaced apart from the edge of the microstructure pattern, a plurality of second sub-regions 1121 can be distributed annularly around the periphery of the first sub-region 1111; for the first sub-region 1111 connected to the edge of the microstructure pattern, a plurality of second sub-regions 1121 can only be arranged around the part of the first sub-region 1111 inside the edge.

[0077] Among them, adjacent two of the plurality of second sub-regions 1121 around the first sub-region 1111 can be spaced apart, or another first sub-region 1111 can be arranged.

[0078] For example, both the first sub-region 1111 and the second sub-region 1121 are square, and a first sub-region 1111 is arranged between every two adjacent ones of the plurality of second sub-regions 1121 around the first sub-region 1111. The transmittance of the first microstructure region 111 is 3% - 8%, such as 5%, so that the position corresponding to the first microstructure region 111 on the second surface 202 appears black; the transmittance of the second microstructure region 112 is 85% - 95%, such as 90%, so that the position corresponding to the second microstructure region 112 on the second surface 202 appears white. In this way, the second surface 202 of the first light guide plate 1 presents a checkerboard pattern.

[0079] As Figure 5 shown, in this embodiment, a third microstructure region 113 is further provided on the first microstructure surface, that is, the first microstructure region 111, the second microstructure region 112 and the third microstructure region 113 form a microstructure pattern. The third microstructure region 113 is provided with a plurality of third protrusions. The third microstructure region 113 divides the second microstructure region 112 into a plurality of second sub-regions 1121. The transmittance of the third microstructure region 113 is greater than that of the first microstructure region 111 and less than that of the second microstructure region 112.

[0080] Among them, most of the light rays emitted by the first light source 5 towards the third protrusions will be reflected and then emitted from the second surface 202 of the first light guide plate 1, and this part of the light rays is used for illumination; a small part of the light rays emitted by the first light source 5 towards the third protrusions are refracted out of the first light guide plate 1. A part of the light rays refracted out of the first light guide plate 1 from the first surface 201 are reflected by the reflection sheet 4 and then re-enter the first light guide plate 1, and then are controlled by the light control film 3 and emitted from the second surface 202, and there is also a part of the light rays that cannot enter the first light guide plate 1 again.

[0081] More light rays that are refracted out of the third microstructure region 113 and re-enter the first light guide plate 1 are more than those refracted out of the first microstructure region 111 and re-enter the first light guide plate 1, and less than those refracted out of the second microstructure region 112 and re-enter the first light guide plate 1. Thus, the transmittance of the third microstructure region 113 is greater than that of the first microstructure region 111 and less than that of the second microstructure region 112. In this way, the color at the position corresponding to the third microstructure region 113 on the second surface 202 is brighter than the color at the position of the first microstructure region 111 and darker than the color at the position of the second microstructure region 112, presenting a pattern composed of three light and dark regions on the second surface 202.

[0082] Among them, adjacent second sub-regions 1121 are separated by the third microstructure region 113, and adjacent first sub-regions 1111 and second sub-regions 1121 are also separated by the third microstructure region 113. Figure 5 The blank area therein is the third microstructure region 113. That is, the third microstructure region 113 separates multiple sub-regions in the microstructure pattern, and a part of the multiple sub-regions are first sub-regions 1111, and another part of the sub-regions are second sub-regions 1121.

[0083] In the case where there is no first sub-region 1111 among the multiple second sub-regions 1121 surrounding the first sub-region 1111, adjacent second sub-regions 1121 are separated by the third microstructure region 113.

[0084] For example, the first sub-region 1111 and the second sub-region 1121 spaced from the edge of the microstructure pattern are both hexagonal, and there are six second sub-regions 1121 surrounding the first sub-region 1111, and each adjacent two second sub-regions 1121 are separated by the third microstructure region 113.

[0085] In this embodiment, different pattern effects can be presented on the second surface 202 by adjusting the shapes, distributions, and positional relationships of the first microstructure region 111 and the second microstructure region 112.

[0086] For example, a part of the light rays emitted by the first light source 5 are refracted out of the first surface 201 through the first protrusion, the second protrusion, and the third protrusion, so that a football pattern is presented on the second surface 202 of the first light guide plate 1. On this basis, by adjusting the shapes of the first sub-regions 1111 and the second sub-regions 1121, multiple first sub-regions 1111 and multiple second sub-regions 1121 can be arranged to form a football pattern with a three-dimensional effect.

[0087] For another example, a part of the light emitted by the first light source 5 is refracted out of the first surface 201 through the first protrusion and the second protrusion, so that a pattern with black and white color characteristics such as a panda pattern, a zebra pattern, or an ink painting is presented on the second surface 202. Of course, in addition to the pattern design with black and white characteristics, other types of patterns can also be set, such as a basketball pattern or a cartoon pattern, etc.

[0088] It should be noted that the sizes of the multiple first protrusions in the first microstructure region 111 can be the same or different, and the multiple first protrusions with the same size are distributed in the first microstructure region 111 according to a set rule. The sizes of the multiple second protrusions in the second microstructure region 112 can be the same or different, and the multiple second protrusions with the same size are distributed in the second microstructure region 112 according to a set rule. The sizes of the multiple third protrusions in the third microstructure region 113 can be the same or different, and the multiple third protrusions with the same size are distributed in the third microstructure region 113 according to a set rule.

[0089] Optionally, the first protrusion, the second protrusion, and the third protrusion in this embodiment are a conical surface, a spherical surface, an ellipsoidal surface, or a free-form surface, and this embodiment does not make specific limitations thereto. By reasonably configuring the surface slopes of the first protrusion, the second protrusion, and the third protrusion, the first microstructure region 111, the second microstructure region 112, and the third microstructure region 113 can respectively have specific transmittances, which can be understood and implemented by those skilled in the art, and this embodiment does not elaborate in detail.

[0090] Specifically, the transmittance of the first microstructure region 111 is 3% - 8%, such as 5%. That is, most of the light refracted out of the first surface 201 of the first light guide plate 1 through the first protrusion cannot be reflected back to the first light guide plate 1 by the reflector 4, so that the position on the second surface 202 of the second light guide plate 2 corresponding to the first microstructure region 111 presents black.

[0091] The transmittance of the second microstructure region 112 is 85% - 95%, such as 90%. That is, most of the light refracted out of the first surface 201 of the first light guide plate 1 through the second protrusion can be reflected back to the first light guide plate 1 by the reflector 4, and then is emitted from the second light guide plate 2 after being controlled by the light control film 3, so that the position on the second surface 202 of the second light guide plate 2 corresponding to the second microstructure region 112 presents white.

[0092] The transmittance of the third microstructure region 113 is 15 - 25%, such as 20%. That is, a relatively large part of the light refracted out of the first surface 201 of the first light guide plate 1 through the third protrusion cannot be reflected back to the first light guide plate 1 by the reflector 4, so that the position on the second surface 202 of the second light guide plate 2 corresponding to the third microstructure region 113 presents gray.

[0093] It should be noted that the first microstructure protrusions on the first light guide plate 1 in the above embodiments may include a first protrusion, a second protrusion, and a third protrusion. That is, the first microstructure protrusions can not only deflect the light rays emitted from the first light source 5 towards it away from the center of the first light guide plate 1, so as to increase the exit light angle of part of the light rays incident on the first light guide plate 1 from the first light source 5, but also control the transmittance of the first microstructure surface.

[0094] Among them, there is a certain functional relationship between the transmittance of the first light guide plate 1 and the curved surface slope of the first microstructure protrusions. When the set transmittance is satisfied, the exit angle of the light rays reflected by it can be adjusted by adjusting the curved surface slope of the first microstructure protrusions, so that the exit light of the first light guide plate 1 is uniform, or a smaller amount of the light rays incident on the first light guide plate 1 from the first light source 5 are emitted from the middle area of the first light guide plate 1, and a larger amount of the light rays are emitted from the outer side area of the first light guide plate 1, thereby improving the illumination uniformity under small illumination areas. This can be understood and implemented by those skilled in the art, and will not be elaborated in detail in this embodiment.

[0095] In this embodiment, the third microstructure surface is integrally formed with the light control film 3.

[0096] In this embodiment, the first microstructure surface is integrally formed with the first light guide plate 1. Or, as Figure 2 shown, the first light guide plate 1 includes a first plate body and a first coating layer 11. The first coating layer 11 is attached to the first plate body, and the first microstructure surface is disposed on the first coating layer 11.

[0097] In this embodiment, the second microstructure surface is integrally formed with the second light guide plate 2. Or, as Figure 2 shown, the second light guide plate 2 includes a second plate body and a second coating layer 21. The second coating layer 21 is attached to the second plate body, and the second microstructure surface is disposed on the second coating layer 21.

[0098] As a specific example, both the first coating layer 11 and the second coating layer 21 are UV curing layers. When the UV glue is in a liquid state, the liquid UV glue is transferred to the plate body by pad printing. After it is cured, a UV curing layer with microstructures is formed, and densely packed and invisible microstructural protrusions to the naked eye are formed on this UV curing layer. Compared with the traditional method of fabricating microstructures by laser etching in this embodiment, the production efficiency is higher, and microstructural protrusions with smaller volumes can be obtained, improving the light control effect of the first light guide plate 1.

[0099] Optionally, the surface of the first microstructure protrusion is a free-form surface, and the size of the first microstructure protrusion in the plane direction of the first light guide plate 1 is less than 80 μm.

[0100] Optionally, the surface of the second microstructure protrusion is a free-form surface, and the size of the second microstructure protrusion in the plane direction of the second light guide plate 2 is less than 80 μm.

[0101] In this embodiment, the light control film 3 and the second light guide plate 2 are integrally formed; alternatively, the light control film 3 is attached to the second light guide plate 2. When the light control film 3 and the second light guide plate 2 are integrally formed, the first surface 201 of the second light guide plate 2 can be set as a plane, that is, no microstructure surface is provided. When the light control film 3 is attached to the second light guide plate 2, the first surface 201 of the second light guide plate 2 can be provided with a second microstructure surface for total reflection of the light emitted from the second light source 6 to the first surface 201 of the second light guide plate 2, or for increasing the exit light angle of the light incident from the second light source 6 to the second light guide plate 2.

[0102] Optionally, the thickness of the light control film 3 is 0.2 - 1 mm.

[0103] Optionally, according to the size of the first light source 5, the thicknesses of the first light guide plate 1 and the second light guide plate 2 are 2 - 5 mm, such as 4 mm. A smaller thickness is beneficial to reducing the size and weight of the lamp.

[0104] This embodiment also provides a lamp, which includes the lamp head described in any of the above embodiments. The lamp can adjust the projected light spot and the size of the illumination area of the lamp head by electronically controlling the lighting or turning off of the first light source 5 and the second first light source 5 to meet the different requirements of various lighting application scenarios. Different transmittance microstructures can also be provided on the first light guide plate 1 to make the light-emitting surface of the lamp present a decorative and aesthetic design pattern, while meeting the lighting requirements and the personalized use requirements of consumers.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this embodiment, rather than to limit them; although this embodiment has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of this embodiment.

Claims

1. A lamp holder, characterized in that, Comprising: A lamp housing, which is provided with a groove having a light outlet. A first light guide plate, a light control film and a second light guide plate which are sequentially stacked from the bottom of the groove towards the light outlet direction; both the first light guide plate and the second light guide plate have opposite first surfaces and second surfaces and a peripheral side surface connecting the first surface and the second surface. A first light source, which is arranged on the peripheral side surface of the first light guide plate. A second light source, which is arranged on the peripheral side surface of the second light guide plate. Wherein, a third microstructure surface is provided on the surface of the light control film, and the third microstructure surface can reduce the outgoing light angle of the light incident from the first light guide plate to the light control film.

2. The lamp holder according to claim 1, characterized in that, It further includes a reflector, and the reflector is provided at the bottom of the groove.

3. The lamp holder according to claim 1, characterized in that, A second microstructure surface is provided on the first surface of the second light guide plate close to the light control film; the second microstructure surface increases the outgoing light angle of the light incident from the second light source to the second light guide plate.

4. The lamp holder according to claim 1, characterized in that, A second microstructure surface is provided on the first surface of the second light guide plate close to the light control film, and the second microstructure surface can totally reflect the light rays emitted from the second light source towards the first surface of the second light guide plate.

5. The lamp holder according to claim 1, characterized in that, A first microstructure surface is provided on the first surface of the first light guide plate close to the light control film, and the first microstructure surface can make the outgoing light of the first light guide plate uniform.

6. The lamp holder according to claim 1, characterized in that, A first microstructure surface is provided on the first surface of the first light guide plate close to the light control film, and the first microstructure surface can increase the outgoing light angle of the light incident from the first light source to the first light guide plate.

7. The lamp holder according to claim 1, characterized in that, A first microstructure surface is provided on the first surface of the first light guide plate close to the light control film, the first microstructure surface is provided with a first microstructure area and a second microstructure area, the first microstructure area is provided with a plurality of first protrusions, the second microstructure area is provided with a plurality of second protrusions, and the transmittance of the first microstructure area is less than that of the second microstructure area.

8. The lamp holder according to claim 3, characterized in that, A plurality of second microstructure protrusions are provided on the second microstructure surface, a plurality of third microstructure protrusions are provided on the third microstructure surface, and the surfaces of the second microstructure protrusions and the third microstructure protrusions are free-form surfaces; the size of the second microstructure protrusions in the plane direction of the second light guide plate and the size of the third microstructure protrusions in the plane direction of the light control film are less than 80μm.

9. The lamp holder according to claim 1, characterized in that, The light control film and the second light guide plate are integrally formed; or, the light control film is attached to the second light guide plate.

10. The lamp holder according to claim 1, characterized in that, The thickness of the light control film is 0.2 - 1mm; and / or, the thickness of the first light guide plate and the second light guide plate is 2 - 5mm.

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