Light-emitting unit, display screen and vehicle lamp

Abstract

The utility model discloses a light-emitting unit, a display screen and a vehicle lamp. The light-emitting unit comprises a bottom plate, a pole piece, a light-emitting chip and an isolation structure. The pole pieces are embedded in the bottom plate, the pole pieces comprise N first pole pieces and N second pole pieces, N is an integer greater than 1, and one first pole piece and one second pole piece form a pole piece group; the light-emitting chips are arranged on the surface of the bottom plate, the number of the light-emitting chips is N, each light-emitting chip corresponds to one pole piece set, and the light-emitting chips are electrically connected with the first pole pieces and the second pole pieces in the corresponding pole piece sets; the isolation structure is arranged on the surface of the bottom plate; and the outer edges, close to each other, of the pole pieces in the two adjacent pole piece groups enclose a cross-shaped avoiding area. One light-emitting chip corresponds to one pole piece group, an independent electric path is formed, various display can be carried out, and the interaction performance is improved; adjacent light-emitting chips are not separated through a partition plate, the light plumpness is improved, the cross-shaped avoiding area and the shape are regular, and machining and forming of the bottom plate are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of automobile lighting equipment, and in particular to a light-emitting unit, a display screen, and an automobile lamp. Background Art

[0002] Interactive technology is increasingly being used in automotive lighting and display screens, which are powered by light-emitting units (LEDs). Existing LEDs cannot be individually controlled, and only one color can be illuminated within a fixed area, resulting in a fixed display pattern. These units offer limited interactive functionality, and with fewer pixels per area, resolution is reduced. This significantly limits the display of graphics and patterns, preventing the simultaneous display of different colors and patterns. Furthermore, light-emitting chips of different colors are separated by partitions, resulting in poor light spot density and dark areas. Lighting does not fill the entire LED unit, and the pattern displays vary depending on the color of the light. Furthermore, the complex mounting base structure hinders processing and molding, increasing production costs.

[0003] Therefore, there is a need to improve the existing technology. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art and provides a light-emitting unit, a display screen and a vehicle lamp.

[0005] According to one aspect of the present application, the present application provides a light-emitting unit, including a base plate, a pole piece, a light-emitting chip and an isolation structure; the pole piece is embedded in the base plate, and the pole piece includes N first pole pieces and N second pole pieces, N is an integer greater than 1, the first pole piece and the second pole piece have opposite polarity, and one first pole piece and one second pole piece constitute a pole piece group; the light-emitting chip is arranged on the surface of the base plate, and the light-emitting chip is provided with N pieces, each of the light-emitting chips corresponds to a group of the pole piece group, and the light-emitting chip is electrically connected to the first pole piece and the second pole piece in the corresponding pole piece group; the isolation structure is arranged on the surface of the base plate and covers the surface of the light-emitting chip to isolate the light-emitting chip from the outside world; wherein, the pole pieces are spaced apart from each other, and the outer edges of the pole pieces in two adjacent pole piece groups are close to each other to form a cross-shaped avoidance area.

[0006] In one embodiment, there is a preset direction, which is parallel to the base plate; each electrode group is arranged along the preset direction, and the outer edges of each electrode in any two adjacent electrode groups are close to each other to form a cross-shaped avoidance area.

[0007] In one embodiment, N=2, and the two light-emitting chips are electrically connected to different electrode groups respectively to form independent electrical paths.

[0008] In one embodiment, there are a first direction and a second direction perpendicular to each other, and the first direction and the second direction are parallel to the base plate; the two first pole pieces are arranged in sequence along the second direction, and in the first direction, the length of the first pole piece is less than the length of the second pole piece; the light-emitting chip is arranged on the second pole piece, and the light-emitting chip is basically located in the middle position of the base plate in the first direction.

[0009] In one embodiment, in the second direction, the light-emitting chip has a first side close to the avoidance area, and the shortest distance between the first side and the avoidance area is L1μm, satisfying: L1≥125; in the first direction, the light-emitting chip has a second side close to the avoidance area, and the shortest distance between the second side and the avoidance area is L2μm, satisfying: L2≥125.

[0010] In one embodiment, in the second direction, the shortest length of the avoidance area is L3 μm, satisfying: L3 ≥ 200; in the first direction, the shortest length of the avoidance area is L4 μm, satisfying: L4 ≥ 200.

[0011] In one embodiment, the light emitted by the light emitting chip is yellow light, white light, or red light.

[0012] In one embodiment, there are a first direction and a second direction perpendicular to each other, and the first direction and the second direction are parallel to the base plate; in the second direction, the pole piece groups are arranged in two groups; in the first direction, the pole piece groups are arranged in at least two groups; the outer edges of the four groups of pole piece groups arranged in a matrix and close to each other form a cross-shaped avoidance area.

[0013] According to another aspect of the present application, a display screen is provided, comprising any of the aforementioned light-emitting units, the display screen further comprising a printed circuit board and a control unit; the light-emitting unit array is arranged on the printed circuit board; the control unit is disposed on the printed circuit board and coupled to the light-emitting unit to control the light-emitting unit.

[0014] In one embodiment, the display screen has at least two display areas, each display area is provided with a plurality of single-color and / or multi-color light-emitting units, and different display areas have different display graphics and / or display frequencies.

[0015] According to another aspect of the present application, a vehicle lamp is provided, comprising any of the aforementioned light-emitting units, the vehicle lamp further comprising a lamp body, a light distribution mirror and a printed circuit board, the lamp body having a receiving cavity, the light distribution mirror cover being arranged at the opening of the receiving cavity to seal the receiving cavity; the printed circuit board being fixed in the receiving cavity, and the light-emitting unit being arranged on a side of the printed circuit board facing the light distribution mirror.

[0016] The beneficial effects of the present application are: through one light-emitting chip corresponding to a group of electrode groups, that is, one light-emitting chip is electrically connected to the first electrode and the second electrode in a group of electrode groups to form an independent electrical path, N light-emitting chips can be individually controlled, and can display different colors and patterns, which effectively improves the interactive performance; and adjacent light-emitting chips are not separated by partitions, which is conducive to improving the light fullness, and there will be no dark areas, and the displayed colors or patterns are more coordinated; in addition, the outer edges of the electrode pieces in adjacent electrode groups are close to each other to form a cross-shaped avoidance area with a regular shape, which is conducive to the processing and forming of the base plate, reduces the processing difficulty of the base plate, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0018] Figure 1 This is a schematic diagram of a light-emitting unit provided in an embodiment of the present application.

[0019] Figure 2 This is a cross-sectional view of a light-emitting unit provided in an embodiment of the present application.

[0020] Figure 3 This is a structural diagram of a vehicle lamp provided in an embodiment of the present application.

[0021] Figure 4 This is a lighting diagram of a light-emitting unit in the prior art provided in an embodiment of the present application.

[0022] Figure 5 This is a schematic diagram of another light-emitting unit provided in an embodiment of the present application.

[0023] Figure 6 This is a schematic diagram of another light-emitting unit provided in an embodiment of the present application.

[0024] In the picture:

[0025] 10. Bottom plate;

[0026] 20. Pole piece; 21. First pole piece; 22. Second pole piece; 23. Pole piece group;

[0027] 30. Light-emitting chip; 31. First side; 32. Second side;

[0028] 40. Isolation structure; 41. Convex cup; 42. Enclosure bracket;

[0029] 50. Avoidance area;

[0030] 60. Headlight; 61. Lamp body; 62. Photometric lens; 621. Internal photometric lens; 622. External photometric lens; 63. Printed circuit board;

[0031] 70. Connecting wire;

[0032] 80. Signpost. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] The light-emitting unit, display screen and vehicle light in this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] In the existing technology, multiple light-emitting chips cannot be controlled individually, only one color can be lit in the display area, the display pattern is fixed, there are few interactive functions, there are fewer pixels in the same area, and the resolution will be reduced; and adjacent light-emitting units are separated by partitions, the light spots are poorly filled, there will be dark areas, and lighting will not fill the entire light-emitting unit, and the pattern will also appear differently under different colors of light; in addition, the base structure used for installation is complex, which is not conducive to processing and molding.

[0037] In order to solve the above technical problems, an embodiment of the present application provides a light-emitting unit, including a base plate, a pole piece, a light-emitting chip and an isolation structure; the pole piece is embedded in the base plate, and the pole piece includes N first pole pieces and N second pole pieces, N is an integer, the first pole piece and the second pole piece have opposite polarity, and one first pole piece and one second pole piece constitute a pole piece group; the light-emitting chip is arranged on the surface of the base plate, and the light-emitting chip is provided with N pieces, each of the light-emitting chips corresponds to a group of the pole piece groups, and the light-emitting chip is electrically connected to the first pole piece and the second pole piece in the corresponding pole piece group; the isolation structure is arranged on the surface of the base plate and covers the surface of the light-emitting chip to isolate the light-emitting chip from the outside world; wherein, the pole pieces are spaced apart from each other, and the outer edges of the pole pieces in two adjacent pole piece groups are close to each other to form a cross-shaped avoidance area. One light-emitting chip corresponds to a group of electrode groups, that is, one light-emitting chip is electrically connected to the first electrode and the second electrode in a group of electrode groups to form an independent electrical path. N light-emitting chips can be controlled individually and can display different colors and patterns, which effectively improves the interactive performance; and adjacent light-emitting chips are not separated by partitions, which is conducive to improving the fullness of the light spot, and there will be no dark areas, and the displayed colors or patterns are more coordinated; in addition, the outer edges of the electrode pieces in adjacent electrode groups are close to each other to form a cross-shaped avoidance area with a regular shape, which is conducive to the processing and forming of the base plate, reduces the processing difficulty of the base plate, and improves production efficiency.

[0038] See Figure 1 and Figure 2In one embodiment, the light-emitting unit includes a base plate 10, on which a pole piece 20 is embedded. The pole piece 20 includes N first pole pieces 21 and N second pole pieces 22, wherein N is an integer greater than 1, the polarity of the first pole piece 21 and the second pole piece 22 are opposite, and one first pole piece 21 and one second pole piece 22 form a pole piece group 23; N light-emitting chips 30 are further provided on the surface of the base plate 10, each light-emitting chip 30 corresponds to a group of pole piece groups 23, and the light-emitting chip 30 is electrically connected to the first pole piece 21 and the second pole piece 22 in the corresponding pole piece group 23. In this embodiment, N=2, that is, there are two light-emitting chips 30, two first pole pieces 21 and two second pole pieces 22, and one light-emitting chip 30 is electrically connected to the first pole piece 21 and the second pole piece 22 in the corresponding pole piece group 23. The plate 30 corresponds to a first pole piece 21 and a second pole piece 22, and the other light-emitting chip 30 corresponds to another first pole piece 21 and another second pole piece 22. The two light-emitting chips 30 are electrically connected to different pole piece groups 23 respectively to form independent electrical paths. The two light-emitting chips 30 can be controlled separately. When the light emitted by the two light-emitting chips 30 is of different colors, different colors can be displayed, thereby improving the interactive performance. An isolation structure 40 is also provided on the surface of the base plate 10. The isolation structure 40 covers the surface of the light-emitting chip 30 to isolate the light-emitting chip 30 from the outside world. In this embodiment, the two light-emitting chips 30 are not blocked, no dark area will appear, the light saturation is good, and the displayed colors are more coordinated (such as Figure 4 In the prior art shown, a partition is provided between the two light-emitting chips 30, so that the overall light saturation of the light-emitting unit is poor, the display is not coordinated, and dark areas will appear); in addition, the pole pieces 20 are spaced from each other, and the pole pieces 20 in the two adjacent pole piece groups 23 are close to each other and form a cross-shaped avoidance area 50 at their outer edges. In this embodiment, the four pole pieces 20 (two first pole pieces 21 and two second pole pieces 22) form a cross-shaped avoidance area 50. The shape of this area is regular, which is conducive to the processing and forming of the base plate 10, and also facilitates the installation between the pole piece 20 and the base plate 10, reduces the processing difficulty of the base plate 10, and improves production efficiency.

[0039] It should be noted that in some embodiments, the value of N can be 3, 4, or the like, depending on the size of the vehicle light 60 or display screen and the desired display effect. A larger value for N indicates that more light-emitting chips 30 can be individually controlled. Different colors of light-emitting chips 30 can be configured according to actual needs, allowing for the display of different patterns and effectively enhancing interactive performance. For example, in some embodiments, the light emitted by the light-emitting chips 30 can be yellow, white, red, or other colors, without limitation. Furthermore, an indicator 80 is provided on the base plate 10 to indicate polarity direction, facilitating installation and use.

[0040] In some embodiments, the light-emitting chip 30 can be a single-line light-emitting chip, which is fixed on one of the first electrode 21 and the second electrode 22 of the same electrode group 23 using conductive silver glue, and then connected to the other of the first electrode 21 and the second electrode 22 in the same electrode group 23 through a connecting wire 70 to form an electrical path for this light-emitting chip 30; in some embodiments, the light-emitting chip 30 can also be a double-line light-emitting chip, which is fixed on one of the first electrode 21 and the second electrode 22 of the same electrode group 23 using insulating glue, and is electrically connected to the first electrode 21 and the second electrode 22 in the same electrode group 23 through a connecting wire 70 to form an electrical path for this light-emitting chip 30; in one embodiment, a mixture of single-line light-emitting chips and double-line light-emitting chips can also be used.

[0041] It should be noted that the connecting wire 70 in the above embodiment is a conductive wire, which is usually made of metal material, such as gold wire. Gold wire has good conductivity and stable physical and chemical properties, which can extend the service life of the product.

[0042] See Figure 6 In one embodiment, the light emitting unit has a preset direction (eg Figure 6 In the embodiment, the electrode groups 23 are arranged along the preset direction, and the outer edges of the electrode pieces 20 in any two adjacent electrode groups 23 close to each other form a cross-shaped avoidance area 50. In the embodiment, there are four electrode groups 23, from top to bottom ( Figure 6 A cross is formed between the first pole piece group 23 and the second pole piece group 23 (in the perspective), a cross is formed between the second pole piece group 23 and the third pole piece group 23, and a cross is formed between the third pole piece group 23 and the fourth pole piece group 23. This arrangement has a regular shape, which is conducive to the processing and forming of the base plate 10, and also facilitates the installation between the pole piece 20 and the base plate 10, reduces the processing difficulty of the base plate 10, and improves production efficiency.

[0043] See Figure 1 In one embodiment, the light emitting units have first directions perpendicular to each other (e.g. Figure 1 、 Figure 5 The middle direction X, the same below) and the second direction (as shown in FIG. Figure 1 、 Figure 5In the embodiment, N=2 is used as an example, i.e., two first pole pieces 21 and two second pole pieces 22 are provided. The two first pole pieces 21 are arranged sequentially along the second direction. In the first direction, the length of the first pole piece 21 is less than the length of the second pole piece 22. In this embodiment, the light-emitting chip 30 is disposed on the second pole piece 22 and is located in the middle of the base plate 10 in the first direction. This arrangement ensures that the light-emitting chip 30 is disposed in the middle of the entire light-emitting unit, ensuring uniform light and good light output.

[0044] In this embodiment, in the second direction, the light-emitting chip 30 has a first side 31 close to the avoidance area 50, and the shortest distance between the first side 31 and the avoidance area 50 is L1μm, satisfying: L1≥125; in the first direction, the light-emitting chip 30 has a second side 32 close to the avoidance area 50, and the shortest distance between the second side 32 and the avoidance area 50 is L2μm, satisfying, L2≥125; it has been verified that when L1 and L2 are within the above parameter range, the light-emitting chip 30 will not have a short circuit phenomenon, which is beneficial to improving the service life of the light-emitting unit.

[0045] It should be noted that, in this embodiment, the first side 31 and the second side 32 are arranged parallel to the edge of the avoidance area 50. In some embodiments, they may be arranged non-parallel to ensure that the shortest distance between the two is not less than 125 μm, thereby avoiding short circuit of the light-emitting chip 30 and improving the service life.

[0046] In one embodiment, the shortest distance of the avoidance area 50 in the second direction is L3 μm, satisfying: L3 ≥ 200; the shortest distance of the avoidance area 50 in the first direction is L4 μm, satisfying: L4 ≥ 200; it has been verified that when L3 and L4 are within the above parameter range, the light-emitting chip 30 will not short-circuit, which is beneficial to improving the service life of the light-emitting unit.

[0047] It should be noted that by adjusting the values ​​of L1, L2, L3, and L4, it is ensured that the light-emitting chip 30 is basically located in the middle position of the base plate 10 in the first direction and the second direction. This can avoid short circuit of the light-emitting chip 30 while ensuring the uniformity of the light and good light output effect.

[0048] See Figure 2In one embodiment, the isolation structure 40 includes a convex cup 41 and a barrier bracket 42. The convex cup 41 covers the surface of the light-emitting chip 30 to isolate the light-emitting chip 30 from the outside world. The barrier bracket 42 is disposed on the surface of the base plate 10 and is disposed on the periphery of the convex cup 41. The convex cup 41 is raised in the middle area on the side away from the base plate 10, and the distance from the highest point of the convex cup 41 to the top surface of the barrier bracket 42 is 0.6 mm. The convex shape of the convex cup 41 lengthens the optical path of light in the central area of ​​the light-emitting unit, reduces the brightness of light emitted from the area directly above the light-emitting chip 30, and thus reduces the brightness of the area directly above the light-emitting chip 30. This reduces the difference in light intensity between the area directly facing the light-emitting chip 30 and the remaining light-emitting areas, improves the lighting fullness and uniformity of the overall light-emitting surface of the light-emitting unit, and improves the lighting effect. It has been verified that when the distance from the highest point of the convex cup 41 to the top surface of the barrier bracket 42 is 0.6 mm, the lighting effect is generally good.

[0049] See Figure 5 In one embodiment, in the second direction, the pole piece groups 23 are arranged in two groups. In the first direction, the pole piece groups 23 are provided with at least two groups. In this embodiment, two groups are provided. That is, in this embodiment, the pole piece groups are arranged transversely ( Figure 5 There are two groups of vertical ( Figure 5 The four electrode sets 23 are arranged in a matrix, with their outer edges close to each other forming a cross-shaped avoidance area 50. This arrangement creates a regular shape, facilitates the processing and forming of the base plate 10, and also facilitates the installation between the electrode sets 20 and the base plate 10, reducing the processing difficulty of the base plate 10 and improving production efficiency.

[0050] It should be noted that in Figure 5 The dotted line frame is used to indicate that the first pole piece 21 and the second pole piece 22 in the dotted line frame constitute a pole piece group 23. Figure 5 There are four electrode groups 23 in total (the remaining electrode groups 23 are not framed); the four electrode groups 23 arranged in a matrix in this embodiment are four electrode groups 23 arranged in an array close to each other in a rectangular shape, and the four electrode groups 23 are respectively located at the four corners of the rectangle. In some embodiments, other numbers of electrode groups 23 can also be arranged in a similar manner, for example, three electrode groups 23 are arranged in the longitudinal direction and three electrode groups 23 are arranged in the transverse direction, and the outer edges of any four electrode groups 23 close to each other and forming a matrix arrangement are surrounded by a cross-shaped avoidance area 50, but the present invention is not limited to this.

[0051] On the other hand, the present application also relates to a display screen comprising any of the aforementioned light-emitting units, the display screen further comprising a printed circuit board 63 and a control unit. The light-emitting units are arrayed on the printed circuit board 63, and the control unit is also disposed on the printed circuit board 63 and coupled to the light-emitting units for controlling the light-emitting units. In this embodiment, the display screen has two display areas, each of which is provided with multiple monochrome light-emitting units. The two display areas have different display patterns and display frequencies (i.e., the time interval between the light-emitting units being on and off). By individually controlling the light-emitting chips 30 in the light-emitting units, a variety of patterns can be displayed in the two display areas of the display screen, providing diverse interactive functions.

[0052] It should be noted that the display screen is not limited to two display areas, and the number of light-emitting units in each display area is not specifically limited in this embodiment. In this embodiment, the multiple single-color light-emitting units can be multiple light-emitting units of the same color, or light-emitting units of different colors. Single-color means that each light-emitting unit is a single color, which can be any color, depending on the actual display effect required. In addition, in some embodiments, multiple multi-color light-emitting units can be set in each display area, that is, a single light-emitting unit can be multi-colored; or in some embodiments, single-color light-emitting units and multi-color light-emitting units can be mixed to further enhance the diversity of interactive styles.

[0053] See Figure 3 On the other hand, the present application also relates to a vehicle lamp 60, comprising any one of the aforementioned light-emitting units, the vehicle lamp 60 further comprising a lamp body 61, a light distribution mirror 62 (the light distribution mirror 62 comprises an inner light distribution mirror 621 and an outer light distribution mirror 622) and a printed circuit board 63, the lamp body 61 having a receiving cavity, the light distribution mirror 62 is covered at the opening of the receiving cavity to seal the receiving cavity, the printed circuit board 63 is fixedly arranged in the receiving cavity, and the light-emitting unit is arranged on the side of the printed circuit board 63 facing the light distribution mirror 62.

[0054] It should be noted that the choice of light-emitting unit for the headlight 60 is determined based on actual usage. For example, a single light can be designed to serve multiple purposes, with the entire headlight designed as a single unit while meeting regulatory requirements. The light-emitting unit can be a white and yellow dual-color unit, which can be used as both a daytime running light and a turn signal, as well as an exterior decoration. Alternatively, the taillight can be designed with a yellow and red dual-color unit, with different areas of the headlight 60 serving different functions, such as a brake light 60, a width indicator light, or a turn signal. This multi-purpose light reduces the number of headlights 60 required on the vehicle and the installation space, thereby enhancing the overall layout and design aesthetics of the vehicle.

[0055] The technical solution provided in the embodiment of the present application is intended to correspond a group of electrode groups 23 through one light-emitting chip 30, that is, one light-emitting chip 30 is electrically connected to the first electrode 21 and the second electrode 22 in a group of electrode groups 23 to form an independent electrical path. N light-emitting chips 30 can be controlled individually and can display different colors and patterns, which effectively improves the interactive performance; and adjacent light-emitting chips 30 are not separated by partitions, which is conducive to improving the light fullness, and there will be no dark areas, and the displayed colors or patterns are more coordinated; in addition, the outer edges of the individual electrode pieces 20 in adjacent electrode groups 23 are close to each other to form a cross-shaped avoidance area 50, which has a regular shape, is conducive to the processing and forming of the base plate 10, reduces the processing difficulty of the base plate 10, and improves production efficiency.

[0056] In the various embodiments of this application, unless otherwise specified or logically conflicting, the terms or descriptions between different embodiments are consistent and can be referenced from each other. The technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships. In this application, "at least one" means one or more, and "more" means two or more.

[0057] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

[0058] The above is a detailed introduction to the light-emitting unit, display screen and car light provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A light emitting unit, characterized in that: include base plate; Pole pieces, embedded in the bottom plate, the pole pieces including N first pole pieces and N second pole pieces, N being an integer greater than 1, the first pole pieces and the second pole pieces having opposite polarities, and one first pole piece and one second pole piece forming a pole piece group; A light-emitting chip is disposed on the surface of the bottom plate, wherein N light-emitting chips are provided, each light-emitting chip corresponds to a group of the electrode group, and the light-emitting chip is electrically connected to the first electrode and the second electrode in the corresponding electrode group; an isolation structure, disposed on the surface of the base plate and covering the surface of the light-emitting chip, so as to isolate the light-emitting chip from the outside world; The pole pieces are spaced apart from each other, and outer edges of the pole pieces in two adjacent pole piece groups that are close to each other form a cross-shaped avoidance area.

2. The light emitting unit according to claim 1, wherein having a preset direction, wherein the preset direction is parallel to the base plate; The electrode groups are arranged along the preset direction, and outer edges of the electrode pieces in any two adjacent electrode groups that are close to each other form a cross-shaped avoidance area.

3. The light emitting unit according to claim 1, wherein N=2, the two light-emitting chips are electrically connected to different electrode groups respectively to form independent electrical paths.

4. The light emitting unit according to claim 3, wherein: It has a first direction and a second direction perpendicular to each other, and the first direction and the second direction are parallel to the bottom plate; The two first pole pieces are arranged sequentially along the second direction; in the first direction, the length of the first pole piece is smaller than the length of the second pole piece; The light-emitting chip is arranged on the second pole piece, and the light-emitting chip is basically located in the middle position of the bottom plate in the first direction.

5. The light emitting unit according to claim 4, wherein: In the second direction, the light emitting chip has a first side close to the avoidance area, the shortest distance between the first side and the avoidance area is L1 μm, and the following conditions are satisfied: L1 ≥ 125; In the first direction, the light emitting chip has a second side close to the avoidance area, and the shortest distance between the second side and the avoidance area is L2 μm, satisfying: L2 ≥ 125.

6. The light emitting unit according to claim 4, wherein: In the second direction, the shortest length of the avoidance area is L3 μm, satisfying: L3 ≥ 200; In the first direction, the shortest length of the avoidance area is L4 μm, satisfying: L4 ≥ 200.

7. The light emitting unit according to claim 1, wherein: It has a first direction and a second direction perpendicular to each other, and the first direction and the second direction are parallel to the bottom plate; In the second direction, the pole piece groups are arranged in two groups; in the first direction, the pole piece groups are arranged in at least two groups; The outer edges of the four pole piece groups arranged in a matrix and close to each other form a cross-shaped avoidance area.

8. A display screen, characterized in that: The display screen comprises the light-emitting unit according to any one of claims 1 to 7, and further comprises a printed circuit board and a control unit; the light-emitting unit array is arranged on the printed circuit board; The control unit is disposed on the printed circuit board and coupled to the light emitting unit to control the light emitting unit.

9. The display screen according to claim 8, wherein: The display screen has at least two display areas, each of which is provided with a plurality of single-color and / or multi-color light-emitting units, and different display areas have different display graphics and / or display frequencies.

10. A vehicle lamp, characterized in that: The vehicle lamp comprises the light-emitting unit according to any one of claims 1 to 7, and further comprises: The lamp body has a receiving cavity; a light distribution mirror, which covers the opening of the accommodating cavity to block the accommodating cavity; A printed circuit board is fixedly arranged in the accommodating cavity, and the light emitting unit is arranged on a side of the printed circuit board facing the light distribution lens.

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