Optical element, optical system and vehicle lamp

Abstract

The invention relates to the field of optical components, and discloses an optical element, an optical system, a vehicle lamp and a vehicle, the optical element comprises an optical surface, the optical surface comprises at least two groups of pixel units, and the light diffusion angle ranges of the pixel units are different. And the optical imaging surfaces of at least part of the pixel units in each group of pixel units are positioned on the same base plane. A pixelated pattern display effect is realized by adopting a simple structure, and the cost is relatively low.

Description

Technical Field

[0001] The present invention relates to optical components, in particular to an optical element, and further to an optical system and a vehicle lamp. Background Art

[0002] In many fields, various lighting or signal indicating devices are known to provide light for lighting or signal indicating. For example, vehicle lights are used in motor vehicles to provide lighting or signal indicating functions to ensure safe driving or provide decorative functions.

[0003] Simple lines and large-area uniform light patterns have been used for many years, and people are gradually tired of them. As user needs continue to develop, more and more automakers are using projection lights to provide personalized lighting patterns. In conventional technologies, decorative rings are used to block part of the light to form patterns, but this causes energy loss and affects the overall optical efficiency. Alternatively, digital micromirror devices (DMDs) or liquid crystal displays (LCDs) can provide rich projection patterns, but they are quite expensive and complicated.

[0004] Therefore, it is necessary to design a new type of optical element to overcome or alleviate the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide an optical element which uses a simple structure to achieve a pixelated pattern display effect at a low cost. The second object of the present invention is to provide an optical system. The third object of the present invention is to provide a vehicle lamp.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides an optical element, including an optical surface, wherein the optical surface includes at least two groups of pixel units, the light diffusion angle range of each group of pixel units is different, and the optical imaging surfaces of at least some of the pixel units in each group of pixel units are located on the same base surface.

[0007] In some embodiments, the optical axis of the optical imaging plane of each group of the pixel units is located outside the light diffusion angle range of other groups of the pixel units.

[0008] In some embodiments, there is a non-overlapping area between the light diffusion angle range of each group of the pixel units and the light diffusion angle range of other groups of the pixel units.

[0009] In some embodiments, there is an overlapping area between the light diffusion angle range of each group of the pixel units and the light diffusion angle range of other groups of the pixel units.

[0010] In some embodiments, each group of pixel units is arranged in a matrix.

[0011] In some embodiments, the orthographic projections of the pixel units of each group along the light emitting direction of the optical system are arranged in a grid.

[0012] In some embodiments, the optical element is a reflector, and the optical imaging surfaces of each group of pixel units together constitute the reflective surface of the reflector.

[0013] In some embodiments, the reflector is a parabolic reflector or a quasi-parabolic reflector.

[0014] In some embodiments, the optical element is a light guide, and the optical imaging surfaces of each group of pixel units together constitute the light emitting surface of the light guide.

[0015] A second aspect of the present invention provides an optical system provided with the optical element described in any one of the above technical solutions.

[0016] A third aspect of the present invention provides a vehicle lamp provided with the optical system described in the above technical solution.

[0017] Through the above technical solution, different groups of pixel units are arranged on the same optical surface, and the light diffusion angle ranges of different groups of pixel units are different, so that different projection patterns can be obtained at different observation angles. The structure is simple and the cost is low. Among them, arranging the optical imaging surfaces of at least part of the pixel units in a group of pixel units on the same base surface is conducive to the formation of the projection pattern.

[0018] Other advantages of the present invention and the technical effects of the preferred embodiments will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic structural diagram of a reflector in a specific embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0022] Figure 3 is a schematic structural diagram of a pixel unit in a specific embodiment of the present invention;

[0023] Figure 4 It is one of the optical path schematic diagrams of the optical system in a specific embodiment of the present invention;

[0024] Figure 5 is the second optical path schematic diagram of the optical system in a specific embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of a reflector viewed from a first viewing angle in a specific embodiment of the present invention;

[0026] Figure 7 yes Figure 6 Schematic diagram of the lighting effect of the reflector when looking at it from the first person perspective;

[0027] Figure 8 is a schematic diagram of a specific embodiment of the present invention looking at the reflector from a second viewing angle;

[0028] Fig. 9 yes Figure 8 Schematic diagram of the lighting effect of the reflector when viewed from the second perspective;

[0029] Fig.10 is a schematic diagram of the arrangement state of two groups of pixel units in a specific embodiment of the present invention;

[0030] Fig.11 is a schematic diagram of adjusting the focal length of a pixel unit in a specific embodiment of the present invention;

[0031] Fig.12 is one of the orthographic projection schematic diagrams of a group of pixel units in a specific embodiment of the present invention;

[0032] Fig.13 is a second schematic diagram of an orthographic projection of a group of pixel units in a specific embodiment of the present invention;

[0033] Fig.14 1 is one of the schematic diagrams of the light diffusion angle ranges of two groups of pixel units in a specific embodiment of the present invention, wherein the light diffusion angle range of the first group of pixel units is 0° to 45°, and the light diffusion angle range of the second group of pixel units is -45° to -15°;

[0034] Fig.15 2 is a schematic diagram of the light diffusion angle range of two groups of pixel units in a specific embodiment of the present invention, wherein the light diffusion angle range of the first group of pixel units is 0° to 45°, and the light diffusion angle range of the second group of pixel units is -25° to 5°;

[0035] Fig.16 is a schematic diagram of a projection pattern formed by the light diffusion angle range of the first group of pixel units in a specific embodiment of the present invention;

[0036] Fig.17 is a schematic diagram of a projection pattern formed by the light diffusion angle range of the second group of pixel units in a specific embodiment of the present invention;

[0037] Fig.18 is a schematic diagram of a projection pattern formed when the light diffusion angle range of the first group of pixel units overlaps with the light diffusion angle range of the second group of pixel units in a specific embodiment of the present invention;

[0038] Fig.19 is one of the schematic diagrams of the light diffusion angle of a group of pixel units in a specific embodiment of the present invention;

[0039] Fig. 20 is a second schematic diagram of the light diffusion angle of a group of pixel units in a specific embodiment of the present invention;

[0040] Fig.21 is a schematic structural diagram of a light guide member in a specific embodiment of the present invention;

[0041] Fig. 22 yes Fig.21 A partial enlarged view of part B.

[0042] Description of Reference Numerals

[0043] 1 pixel unit 11 sub-reflection surfaces

[0044] 12 side connection surface 13 bottom surface

[0045] 2 light sources 3 reflectors

[0046] 4 Light guide DETAILED DESCRIPTION

[0047] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments of the invention herein, but includes all technical solutions falling within the scope of the claims.

[0048] The present invention provides these embodiments to make the present invention thorough and complete, and fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0049] It should be noted that, in the description of the present invention, unless otherwise specified, the indicated orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The orientation terms of the present invention should be understood in conjunction with the actual installation state.

[0050] In addition, the words "first", "second", "third" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0051] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0052] All terms used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0053] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0054] like Figures 1 to 22 As shown, an embodiment of the present invention provides an optical element, including an optical surface, the optical surface includes at least two groups of pixel units 1, the light diffusion angle range of each group of pixel units 1 is different, and the optical imaging surfaces of at least some of the pixel units 1 in each group of pixel units 1 are located on the same base surface.

[0055] Wherein, when the optical element is a reflector 3, the optical imaging surface of the pixel unit 1 is a sub-reflection surface, and the optical imaging surfaces of each pixel unit 1 constitute the reflection surface of the reflector 3, which is used to reflect the light emitted by the light source 2. When the optical element is a light guide 4, the optical imaging surface of the pixel unit 1 is a sub-light emitting surface, and the optical imaging surfaces of each pixel unit 1 constitute the light emitting surface of the light guide 4, which is used to refract the light emitted by the light source 2. “The optical imaging surfaces of some pixel units 1 are located on the same base plane” can be understood as the optical imaging surfaces of some pixel units 1 are coplanar, where the base plane is a concept of a virtualized surface, and the base plane can be a plane or a curved surface. For example, Figure 2 and Figure 3 In the embodiment of the present invention, the base surface is a plane. Fig.10 In the embodiment of the invention, the base surface is a parabola. Thus, for each group of pixel units 1, the optical imaging surfaces of at least part of the pixel units 1 are set on the same base surface, which can effectively form the desired pattern, so that the group of pixel units 1 can obtain a certain light diffusion angle range, and the light diffusion angle ranges of each group of pixel units 1 are different, forming different projection patterns, so that the human eye can observe different lighting effects when observing the optical element from different angles. The structure is simple, the cost is low, and it will not affect the overall optical efficiency of the headlight.

[0056] In order to better understand the technical solution of the present invention, the following is a specific description using the reflector 3 as an example of an optical element.

[0057] Figure 5 The reflective light path effect of a reflector according to an exemplary embodiment of the present invention is schematically shown. The reflector can be used as a component of a device such as a vehicle lighting lamp, a signal lamp, a projection lamp or a decorative lamp, and can be used to project a desired pattern in a projection area, such as a road surface, a wall, a vehicle interior or other desired locations, for example, personalized patterns such as smiling faces, hearts, flowers, animals / plants, vehicle logos, etc., vehicle driving-related information such as vehicle speed, turn arrows, travel arrows, lanes, etc., such as road construction, warnings / indicators, text symbols, etc., to achieve lighting or signal indication functions.

[0058] like Figures 1 to 9 As shown, the reflector 3 of the present invention includes at least one pattern reflection surface, and the pattern reflection surface includes at least two groups of pixel units 1, and each group of pixel units 1 is used to jointly define reflection patterns in different reflection directions. Among them, the pattern reflection surface refers to a part of the optical surface of the optical element, and the optical surface can be divided into several pattern reflection surfaces.

[0059] In order to better understand the technical solution of the present invention, the reflector 3 of the present invention can be applied to a specific vehicle lamp. Figure 4The embodiment schematically shows that the reflector 3 and the light source 2 are combined to form an optical system and are installed in a vehicle lamp, and the light source 2 is arranged correspondingly to each pattern reflection surface on the reflector 3. Taking the vehicle lamp as a headlamp as an example, the pattern reflection surface can reflect the light emitted by the light source 2, and reflect the reflected image to the road surface in front of the vehicle to achieve lighting or signal indication. Figure 5 It schematically shows that two groups of pixel units 1 are set in the same pattern reflection surface to reflect the light emitted by the light source 2 at different angles to form different reflection patterns, so that the human eye can observe different lighting effects when observing the reflector 3 from different angles. Moreover, the structure is simple, the cost is low, and the overall optical efficiency of the headlight will not be affected. It is understandable that the present invention is not limited to Figure 5 In the embodiment of the two groups of pixel units 1 shown, more groups of pixel units 1 can be arranged in the same pattern reflection surface according to design requirements to reflect the light emitted by the light source 2 at different angles to form different reflection patterns.

[0060] Specifically, the reflective surface of the reflector 3 is divided to form tiny areas arranged in an array or in a certain manner. The tiny areas serve as pixel units 1. Each pixel unit 1 is divided into regions to form different pattern reflective surfaces. By setting the reflective direction of the pixel unit 1, the expected reflection pattern is obtained.

[0061] In some embodiments, Figure 3 As shown, the pixel unit 1 includes a sub-reflection surface 11, a side connecting surface 12 and a bottom surface 13. The sub-reflection surface 11 is connected to the bottom surface 13 through the side connecting surface 12. The sub-reflection surface 11 is not parallel to the bottom surface 13, and the sub-reflection surface 11 is flipped at a certain angle relative to the bottom surface 13. For a number of pixel units 1 in the same pattern reflection surface, according to the required reflection pattern, the sub-reflection surface 11 of the pixel unit 1 at the corresponding position is selected to flip at a certain angle relative to the bottom surface 13 to form a group of pixel units 1, and the light emitted by the light source 2 is reflected at a certain angle to form an expected reflection pattern. Similarly, the sub-reflection surfaces 11 of the remaining pixel units 1 can be selected to flip at another angle relative to the bottom surface 13 to form another group of pixel units 1, and the light emitted by the light source 2 is reflected at another angle to form another expected reflection pattern. For example, the sub-reflection surfaces 11 of the same group of pixel units 1 used to jointly define the same reflection pattern have the same orientation, that is, the flip angles of the sub-reflection surfaces 11 of the group of pixel units 1 are consistent or the optical axes of the sub-reflection surfaces 11 of the group of pixel units 1 are parallel. Specifically, Figure 6 and Figure 8 The situations of observing the reflector 3 from different angles are shown respectively. Figure 6The figure shows the appearance of each pattern reflective surface on the reflector 3 when observing the reflector 3 from the front. The observation angle can be defined as the first viewing angle. Figure 7 The lighting effect shown, wherein the light-colored squares indicate that the light reflected by the sub-reflective surface 11 of the pixel unit 1 at the first viewing angle enters the human eye and lighting can be observed, and the dark-colored squares indicate that the light reflected by the sub-reflective surface 11 of the pixel unit 1 at the first viewing angle does not enter the human eye and lighting cannot be observed. The combination of lighting and non-lighting obtains a lighting effect. Figure 8 The figure shows the appearance of each pattern reflective surface on the reflector 3 when observing the reflector 3 from the side. This observation angle can be defined as a second viewing angle. Fig. 9 The lighting effect shown, wherein the light-colored squares indicate that the light reflected by the sub-reflective surface 11 of the pixel unit 1 at the second viewing angle enters the human eye and lighting can be observed, and the dark-colored squares indicate that the light reflected by the sub-reflective surface 11 of the pixel unit 1 at the second viewing angle does not enter the human eye and lighting cannot be observed. The combination of lighting and non-lighting obtains another lighting effect.

[0062] Compare Figure 7 and Fig. 9 It can be clearly seen that for the same pattern reflective surface on the reflector 3, different lighting effects can be obtained when observed from different angles. When driving at night, on some relatively remote roads, when passing through an intersection, pedestrians or vehicles at the side intersections sometimes cannot find the straight-moving vehicles well, and traffic accidents are prone to occur. In this regard, the present invention sets two groups of pixel units 1 on the same pattern reflective surface, so that the two groups of pixel units 1 can reflect light in different directions, and can provide lighting or signal indications to vehicles or pedestrians in the opposite and side directions, thereby avoiding the occurrence of traffic accidents.

[0063] In some embodiments, the angle between the reflective surface 11 and the side connecting surface 12 is greater than 80 degrees.

[0064] In some embodiments, Figure 3 As shown, the sideline of the sub-reflecting surface 11 can be a straight line. In order to obtain a light pattern with relatively uniform brightness, the sideline of the sub-reflecting surface 11 can be an arc. Generally, the greater the curvature of the arc, the greater the degree of light diffusion. Therefore, the curvature of the sideline of the sub-reflecting surface 11 can be designed according to design requirements, so that the sub-reflecting surface 11 can take into account the requirements of light collimation and diffusion at the same time.

[0065] In some embodiments, Figure 3As shown, the sub-reflection surface 11 is a rectangular surface, so that the pixel unit 1 is a hexahedral structure. Of course, the sub-reflection surface 11 is not limited to a rectangular surface, and can also be other shapes. Alternatively, the pixel unit 1 can also be other suitable structures with a reflective surface.

[0066] like Figures 1 to 9 As shown, a preferred embodiment of the present invention provides a reflector 3, including at least one pattern reflective surface, the pattern reflective surface includes at least two groups of pixel units 1, the pixel unit 1 includes a sub-reflective surface 11, a side connecting surface 12 and a bottom surface 13, the sub-reflective surface 11 is connected to the bottom surface 13 through the side connecting surface 12, the sub-reflective surface 11 and the bottom surface 13 are not parallel, and the sub-reflective surface 11 has a certain angle flip relative to the bottom surface 13. The angle between the reflective surface 11 and the side connecting surface 12 is greater than 80 degrees, the side line of the sub-reflective surface 11 can be a straight line or an arc, the sub-reflective surface 11 is a rectangular surface, and the sub-reflective surface 11 has four vertices. The sub-reflective surfaces 11 of the same group of pixel units 1 have the same orientation, which is used to jointly define the same reflection pattern, so that each group of pixel units 1 is used to jointly define reflection patterns of different reflection directions.

[0067] Compared with conventional projection schemes of digital micromirror devices (DMDs), liquid crystal displays (LCDs) or rotating optical elements, the present invention realizes the pixelated pattern display effect of the reflector system in a way that basically does not increase the cost. Different lighting effects can be obtained by observing a pattern reflection surface from different angles. The order in which the patterns appear can be controlled by turning on and off the light source 2 corresponding to the reflector 1, thereby realizing a simple time-series animation effect. The appearance is no different from that of a traditional reflector, and the lighting effect can bring a sense of surprise.

[0068] In the above Figures 1 to 9 In the various embodiments of the reflector shown, the sub-reflection surface 11 of the pixel unit 1 is a plane, so that the reflector 3 as a whole can be regarded as a plane reflector. It can be understood that the reflector 3 of the present invention is not limited to a plane reflector, and can also be a parabolic reflector or a quasi-parabolic reflector. The quasi-parabolic reflector refers to a reflector that is similar in shape to a parabolic reflector and can achieve similar functions. When the reflector 3 is a parabolic reflector, the sub-reflection surface 11 of the pixel unit 1 is a parabola, which can diffuse light. By designing the parabolic shape of the sub-reflection surface 11, the sub-reflection surface 11 can simultaneously take into account the requirements of light collimation and diffusion. Compared with the case where the sub-reflection surface 11 is a plane, the pixel unit 1 can obtain a larger light diffusion angle.

[0069] Furthermore, if Fig.10 As shown, taking two groups of pixel units 1 as an example, Fig.10 It shows the situation where two groups of pixel units 1 have different light diffusion angles, Fig.19 and Fig. 20 A schematic diagram of light paths of two groups of pixel units 1 with different light diffusion angle ranges is given. Among them, one group of pixel units 1 is named as the first group of pixel units, the first group of pixel units includes a plurality of first pixel units, the optical imaging surfaces of these first pixel units are arranged on the first base surface a, and the optical imaging surface of the first group of pixel units as a whole has an optical axis x, and another group of pixel units 1 is named as the second group of pixel units, the second group of pixel units includes a plurality of second pixel units, the optical imaging surfaces of these second pixel units are arranged on the second base surface a', and the optical imaging surface of the second group of pixel units as a whole has an optical axis x'. There is an angle between the optical axis x of the overall optical imaging surface of the first group of pixel units and the optical axis x' of the overall optical imaging surface of the second group of pixel units, so that the first group of pixel units and the second group of pixel units have different light diffusion angle ranges.

[0070] In some embodiments, Fig.14 and Fig.15 As shown, the optical axis of the optical imaging surface of one group of pixel units 1 can be set to be outside the light diffusion angle range of other groups of pixel units 1, so that at different observation angles, the groups of pixel units 1 can be combined to form different light patterns.

[0071] Specifically, “setting the optical axis of the optical imaging surface of one group of pixel units 1 to be outside the light diffusion angle range of other groups of pixel units 1” can be divided into two cases, one of which is: Fig.14 There is no overlap between the light diffusion angle range of the first group of pixel units and the light diffusion angle range of the second group of pixel units. The light diffusion angle range of the first group of pixel units can be 0° to 45°, which can form Fig.16 The pattern shown in FIG. 1 can be formed by the light diffusion angle range of the first group of pixel units being -45° to -15°. Fig.17 As shown in the pattern, since there is no overlapping area between the light diffusion angle range of the first group of pixel units and the light diffusion angle range of the second group of pixel units, at certain observation angles, the pattern cannot be seen in a part of the area between the light diffusion angle range of the first group of pixel units and the light diffusion angle range of the second group of pixel units, that is, at these observation angles, no light enters the human eye and lighting cannot be observed; another situation is: Fig.15 There is an overlap between the light diffusion angle range of the first group of pixel units and the light diffusion angle range of the second group of pixel units. The light diffusion angle range of the first group of pixel units can be 0° to 45°, which can form Fig.16 The pattern shown in FIG. 1 can be formed by the light diffusion angle range of the first group of pixel units being -25° to 5°. Fig.17In the pattern shown, since there is an overlapping area between the light diffusion angle range of the first group of pixel units and the light diffusion angle range of the second group of pixel units, at certain observation angles, a portion of the area between the light diffusion angle range of the first group of pixel units and the light diffusion angle range of the second group of pixel units can be seen. Fig.18 The patterns shown, that is, at these observation angles, light enters the human eye and can be observed to be lit. Fig.16 , Fig.17 and Fig.18 The pattern shown is only an example. The pattern formed by each group of pixel units 1 of the present invention is not limited to Fig.16 , Fig.17 and Fig.18 As shown in the pattern, the pattern formed by each group of pixel units 1 can be designed as needed.

[0072] Since the optical imaging surfaces of each pixel unit 1 in a group of pixel units 1 need to be arranged on the same base plane, and since the light diffusion angle ranges of each group of pixel units 1 are different, the reflection angles of the optical imaging surfaces of each group of pixel units 1 are also different. By selecting a certain plane of the reflector 3 as the reference plane, it can be known that the distance from the same point on the sub-reflection surface 11 of each pixel unit 1 to the reference plane is different. Therefore, in the process of light reflection by the sub-reflection surface 11 of each pixel unit 1, the light reflected by the sub-reflection surface 11 of a certain pixel unit 1 may be blocked by the side connecting surface 12 of the adjacent pixel unit 1, resulting in a waste of light energy. In this regard, it is necessary to adjust the focal length of the optical imaging surface of some pixel units 1 in a group of pixel units 1, and design each group of pixel units 1 as follows. Specifically, Fig.11 Take this as an example to illustrate. Fig.11In the embodiment of the present invention, a group of pixel units 1 is named as a first group of pixel units, the first group of pixel units includes a plurality of first pixel units, and the optical imaging surfaces of these first pixel units are arranged on a first base surface a; another group of pixel units 1 is named as a second group of pixel units, the second group of pixel units includes a plurality of second pixel units, and the optical imaging surfaces of these second pixel units are arranged on a second base surface a'; another group of pixel units 1 is named as a third group of pixel units, the third group of pixel units includes a plurality of third pixel units, and the optical imaging surfaces of these third pixel units are arranged on a third base surface a", and the first base surface a and the third base surface a" are relatively closer in spatial arrangement, so when the first pixel unit and the third pixel unit are arranged close to each other, the third pixel unit reflects the light reflected by the first pixel unit. The light blocking effect is small. Since the first base surface a and the second base surface a' are relatively farther apart in space arrangement, when the first pixel unit and the second pixel unit are arranged close to each other, the second pixel unit has a greater blocking effect on the light reflected by the first pixel unit. To this end, the focal length of the optical imaging surface of some second pixel units on the second base surface a' can be adjusted, and the second base surface a' can be rotated to the position of the third base surface a", so that the optical imaging surfaces of these second pixel units are closer to the first base surface a than before. Therefore, when the first pixel unit and the second pixel unit are arranged close to each other, the blocking effect of the second pixel unit on the light reflected by the first pixel unit is reduced. Through such a design, when each group of pixel units 1 is designed on the optical surface of the optical element, better light efficiency can be obtained.

[0073] In some embodiments, each group of pixel units 1 is arranged in a matrix, and further, Fig.12 and Fig.13 As shown, the orthographic projections of each group of pixel units 1 along the light emitting direction of the optical system are arranged in a grid. Within the range of the grid, the base plane rotates around the optical axis, and the optical imaging surfaces of several pixel units 1 with the same base plane are still located on the same base plane after the rotation. Here, the optical imaging surfaces of the pixel units 1 are still a group before and after the rotation. Alternatively, within the range of the grid, the base plane rotates around the optical axis, and the optical imaging surfaces of several pixel units 1 originally located on the same base plane, among which the optical imaging surfaces of some pixel units 1 rotate separately, at this time, the pixel units 1 that were originally a group may be divided into multiple groups of pixel units 1.

[0074] In some embodiments, Fig.21 and Fig. 22As shown, the optical element can be a light guide 4, the optical imaging surface of the pixel unit 1 is a sub-light emitting surface, and the optical imaging surfaces of each pixel unit 1 form a light emitting surface of the light guide 4, which is used to refract the light emitted by the light source 2, thereby forming a required light pattern. It should be noted that the difference between the light guide 4 and the reflector 3 is that the light guide 4 is used to converge and refract light, and the reflector 3 is used to converge and reflect light. The above-mentioned arrangement of each group of pixel units 1 in the reflector 3 can be applied to the light guide 4, so it is not repeated here.

[0075] like Figure 4 and Figure 5 As shown, the present invention also provides an optical system, including several light sources and the above-mentioned optical element, the light source 2 is arranged corresponding to the optical surface of the optical element, and the optical surface is configured to enable the light emitted by the reflected light source 2 to be projected from different directions and form corresponding light patterns.

[0076] The present invention further provides a vehicle lamp provided with the above-mentioned optical system, and thus at least has all the beneficial effects brought by the technical solution of the above-mentioned optical system embodiment, which will not be described in detail here.

[0077] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. An optical element, characterized in that: The optical surface comprises at least two groups of pixel units (1), the light diffusion angle ranges of the pixel units (1) in each group are different, and the optical imaging surfaces of at least some of the pixel units (1) in each group of the pixel units (1) are located on the same base surface.

2. The optical element according to claim 1, characterized in that The optical axis of the optical imaging surface of each group of pixel units (1) is located outside the light diffusion angle range of other groups of pixel units (1).

3. The optical element according to claim 2, characterized in that There is a non-overlapping area between the light diffusion angle range of each group of pixel units (1) and the light diffusion angle range of other groups of pixel units (1).

4. The optical element according to claim 2, characterized in that There is an overlapping area between the light diffusion angle range of each group of pixel units (1) and the light diffusion angle range of other groups of pixel units (1).

5. The optical element according to claim 1, characterized in that Each group of pixel units (1) is arranged in a matrix.

6. The optical element according to claim 5, characterized in that The orthographic projections of the pixel units (1) of each group along the light emitting direction of the optical system are arranged in a grid.

7. The optical element according to any one of claims 1 to 6, characterized in that The optical element is a reflector (3), and the optical imaging surfaces of each group of pixel units (1) together constitute the reflective surface of the reflector (3).

8. The optical element according to claim 7, characterized in that The reflector (3) is a parabolic reflector or a quasi-parabolic reflector.

9. The optical element according to any one of claims 1 to 6, characterized in that The optical element is a light guide (4), and the optical imaging surfaces of each group of pixel units (1) together constitute the light emitting surface of the light guide (4).

10. An optical system, characterized in that: The optical element according to any one of claims 1 to 9 is provided.

11. A vehicle lamp, characterized in that: An optical system according to claim 10 is provided.

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