Vehicle lamp and vehicle

Abstract

A vehicle lamp, comprising a first lamp module (20) and a second lamp module (30), wherein the first lamp module (20) comprises a first pixel electrode (25) and a first light-emitting layer (270); the first pixel electrode (250) comprises a first electrode surface (252) and a second electrode surface (254), which are away from each other, the first electrode surface (252) is adjacent to a light-emergent face (20a), the second electrode surface (254) is away from the light-emergent face (20a), and the first light-emitting layer (270) is arranged on the second electrode surface (254); the second lamp module (30) comprises a second pixel electrode (350) and a second light-emitting layer (370); the second pixel electrode (350) comprises a third electrode surface (352) and a fourth electrode surface (354), which are away from each other, the third electrode surface (352) is adjacent to a light-emergent face (30a), the fourth electrode surface (354) is away from the light-emergent face (30a), and the second light-emitting layer (370) is arranged on the fourth electrode surface (354); and the second lamp module (30) is obliquely arranged relative to the first lamp module (20).

Description

Headlights and vehicles Technical Field

[0001] The present application belongs to the field of display technology, and in particular to vehicle lights and vehicles. Background Art

[0002] OLED displays (organic electroluminescent displays) are gradually replacing LCDs as the mainstream display technology, thanks to their lightweight, self-luminous, wide viewing angle, fast response time, low brightness, and low power consumption. OLED displays are now being used in automotive displays, such as OLED deep red taillights. These deep red taillights typically utilize bottom-emitting OLED devices. While the microcavity effect of bottom-emitting devices is significantly reduced compared to top-emitting devices, significant brightness degradation still occurs at wide viewing angles.

[0003] To meet the needs of functionality and aesthetics, taillights are often made up of multiple light panels, and the multiple light panels often have different arrangements. This causes the light output of the OLED devices to be at different angles, and the light output of the spliced ​​taillights will have uniformity problems when viewed from the rear.

[0004] Summary of the Invention

[0005] According to a first aspect of an embodiment of the present application, a vehicle lamp is provided, which has a light-emitting surface and includes: a first lamp module, including a first pixel electrode and a first light-emitting layer, the first pixel electrode including a first electrode surface and a second electrode surface that are far away from each other, the first electrode surface is adjacent to the light-emitting surface, the second electrode surface is far away from the light-emitting surface, and the first light-emitting layer is arranged on the second electrode surface; a second lamp module, including a second pixel electrode and a second light-emitting layer, the second pixel electrode including a third electrode surface and a fourth electrode surface that are far away from each other, the third electrode surface is adjacent to the light-emitting surface, the fourth electrode surface is far away from the light-emitting surface, and the second light-emitting layer is arranged on the fourth electrode surface; wherein, the second lamp module is arranged obliquely relative to the first lamp module.

[0006] In some embodiments, the third electrode surface and the fourth electrode surface of the second pixel electrode are both curved surfaces.

[0007] In some embodiments, a middle region of the third electrode surface and / or the fourth electrode surface protrudes toward the light emitting surface.

[0008] In some embodiments, the first electrode surface and / or the second electrode surface is planar.

[0009] In some embodiments, the first lamp module is horizontally arranged, the second lamp module is tilted, and the light-emitting surface of the vehicle lamp is in the shape of an outwardly convex curved surface.

[0010] In some embodiments, the first lamp module also includes a first substrate, a first pixel defining layer and a first encapsulation layer, the first pixel defining layer and the first pixel electrode are arranged on the first substrate, and a first groove is provided in the first pixel defining layer; at least part of the first light-emitting layer is provided in the first groove and is located on the side of the first pixel electrode away from the first substrate; the first encapsulation layer covers the first pixel defining layer and the first light-emitting layer.

[0011] In some embodiments, the first lamp module also includes a first metal connection layer, a first insulating layer and a first metal bump, the first insulating layer covers the first metal connection layer, the first insulating layer is provided with a first through hole, the first metal bump is filled in the first through hole and is electrically connected to the first metal connection layer; the first pixel defining layer covers the first metal bump and the first insulating layer.

[0012] In some embodiments, the second lamp module further includes a second substrate, a passivation layer, a second pixel defining layer and a second encapsulation layer, the passivation layer is arranged on the second substrate, the second pixel defining layer and the second pixel electrode are arranged on the side of the passivation layer away from the second substrate, the surface of the passivation layer adjacent to the second pixel electrode includes a curved surface, and a second groove is provided in the second pixel defining layer; at least a portion of the second light-emitting layer is arranged in the second groove and is located on the side of the second pixel electrode away from the second substrate; the second encapsulation layer covers the second pixel defining layer and the second light-emitting layer.

[0013] In some embodiments, the second lamp module further includes a second metal connection layer, a second insulating layer and a second metal bump, the second insulating layer covers the second metal connection layer, the second insulating layer is provided with a second through hole, the second metal bump is filled in the second through hole and is electrically connected to the second metal connection layer; the second pixel defining layer covers the second metal bump and the second insulating layer.

[0014] In some embodiments, a refractive index of the second pixel electrode and a refractive index of the passivation layer are both greater than a refractive index of the second substrate.

[0015] In some embodiments, the vehicle lamp further comprises a third lamp module, wherein the third lamp module is connected to a side of the second lamp module away from the first lamp module; the third lamp module is tilted relative to the first lamp module, and the tilt angle of the third lamp module is larger than the tilt angle of the second lamp module; the third lamp module comprises a third pixel electrode and a third light-emitting layer, the third pixel electrode comprises a fifth electrode surface and a sixth electrode surface away from each other, the fifth electrode surface is adjacent to the light-emitting surface, the sixth electrode surface is away from the light-emitting surface, and the third light-emitting layer is arranged on the sixth electrode surface; the fifth electrode surface and the sixth electrode surface are both curved surfaces, and the curvature of the fifth electrode surface and the sixth electrode surface is greater than the curvature of the third electrode surface and the fourth electrode surface.

[0016] In some embodiments, the angle α between the second lamp module and the first lamp module satisfies: 40°≤α≤55°; the angle β between the extension line of the third lamp module and the first lamp module satisfies: 60°≤β≤75°.

[0017] In some embodiments, the third lamp module also includes a third substrate, a passivation layer, a third pixel defining layer and a third encapsulation layer, the passivation layer is arranged on the third substrate, the third pixel defining layer and the third pixel electrode are arranged on the side of the passivation layer away from the third substrate, the surface of the passivation layer adjacent to the third pixel electrode includes a curved surface, and a third groove is provided in the third pixel defining layer; at least part of the third light-emitting layer is arranged in the third groove and is located on the side of the third pixel electrode away from the third substrate; the third encapsulation layer covers the third pixel defining layer and the third light-emitting layer.

[0018] In some embodiments, the third lamp module also includes a third metal connection layer, a third insulating layer and a third metal bump, the third insulating layer covers the third metal connection layer, the third insulating layer is provided with a third through hole, the third metal bump is filled in the third through hole and is electrically connected to the third metal connection layer; the third pixel defining layer covers the third metal bump and the third insulating layer.

[0019] In some embodiments, a refractive index of the third pixel electrode and a refractive index of the passivation layer are both greater than a refractive index of the third substrate.

[0020] In some embodiments, the first lamp module, the second lamp module, and the third lamp module are formed on the same substrate and encapsulated by the same packaging layer.

[0021] In some embodiments, the car lamp further includes an assembled base plate and a cover plate, and the first lamp module, the second lamp module and the third lamp module are all accommodated in the space formed by the base plate and the cover plate; or, the car lamp further includes an assembled first base plate and a first cover plate, an assembled second base plate and a second cover plate, and an assembled third base plate and a third cover plate, the first lamp module is accommodated in the space formed by the first base plate and the first cover plate, the second lamp module is accommodated in the space formed by the second base plate and the second cover plate, and the third lamp module is accommodated in the space formed by the third base plate and the third cover plate.

[0022] According to a second aspect of an embodiment of the present application, a vehicle is provided, comprising the vehicle lamp as described above.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] FIG1 is a schematic diagram showing the brightness attenuation of a bottom-emitting OLED device at various viewing angles;

[0026] FIG2 is a schematic diagram of a related vehicle lamp and its light output condition;

[0027] FIG3 is a schematic structural diagram of a vehicle lamp according to an embodiment of the present application;

[0028] 4A and 4B are schematic structural diagrams of the first lamp module and the second lamp module in the vehicle lamp shown in FIG3 ;

[0029] FIG5 is a schematic structural diagram of a vehicle lamp according to another embodiment of the present application;

[0030] FIG6 is a schematic structural diagram of a vehicle lamp according to another embodiment of the present application;

[0031] 7A, 7B, and 7C are schematic structural diagrams of the first, second, and third lamp modules of the vehicle lamp shown in FIG6 , respectively;

[0032] FIG8 is a schematic structural diagram of a vehicle lamp according to another embodiment of the present application. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0034] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the art to which this application belongs. The use of "a" or "an," and similar terms in this specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one. "Multiple" means two or more. "Include" or "comprising," and similar terms mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising," and their equivalents, and do not exclude other elements or objects. "Connected" or "connected," and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. "On" and / or "below," and similar terms are for convenience only and are not limited to a single position or spatial orientation. As used in this specification and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0035] Figure 1 illustrates the brightness decay of a bottom-emitting OLED device at various viewing angles. At a zero-degree angle (i.e., when the user is facing the OLED substrate directly), the device's brightness is 100%, showing no decay. The greater the angle between the user and the OLED device, the more severe the brightness decay. For example, at a 60-degree viewing angle, the device's brightness decays to approximately 80%, and at an 80-degree viewing angle, it decays to approximately 65%.

[0036] Figure 2 is a schematic diagram of the relevant headlights and their light output conditions. The headlights are made up of multiple OLED devices. The figure shows three of the light modules: the first light module 2 is set horizontally, and its maximum light output angle is facing the rear of the headlight, with 100% brightness and no brightness attenuation. The second light module 3 is set at an angle, and its maximum light output angle is in the L3 direction; the brightness of the second light module 3 directly behind is about 80% of the maximum brightness, with obvious brightness attenuation. The third light module 4 is set at an angle, and the angle of inclination is larger, and its maximum light output angle is in the L4 direction; the brightness of the third light module 4 directly behind is about 60% of the maximum brightness, and the brightness attenuation is more severe. This makes the light output brightness of different parts of the headlights vary significantly, and there is a uniformity problem.

[0037] Fig. 3 is a schematic diagram of the structure of a vehicle lamp according to an embodiment of the present application. Fig. 4A and Fig. 4B are schematic diagrams of the structure of a first lamp module and a second lamp module in the vehicle lamp shown in Fig. 3, respectively.

[0038] As shown in Figures 3, 4A and 4B, the headlight may include a first lamp module 20 and a second lamp module 30. The first lamp module 20 may be arranged horizontally so that the light emitting surface 20a of the first lamp module 20 faces the rear of the headlight. The second lamp module 30 may be arranged tilted so that the light emitting surface 30a of the second lamp module 30 faces the rear of the headlight, and the normal L30 perpendicular to the light emitting surface 30a also faces the rear of the headlight. The light emitting surface 20a of the first lamp module 20 and the light emitting surface 30a of the second lamp module 30 together constitute the light emitting surface of the headlight. Since the first lamp module 20 is arranged horizontally and the second lamp module 30 is arranged tilted, the entire light emitting surface of the headlight is an outwardly convex curved surface as a whole.

[0039] By configuring the first and second light modules 20 and 30 with specific configurations, their maximum light output angles can be aligned directly or approximately aligned with the rear of the headlight, ensuring uniform light output across all areas of the headlight. Specifically, the maximum light output direction of the first light module 20 can be aligned with its normal line L20, while the maximum light output direction of the second light module 30 can be aligned with its normal line L30 at an angle α.

[0040] To achieve the above-mentioned purpose, the first lamp module 20 may include a first pixel electrode 250 and a first light-emitting layer 270, the first pixel electrode 250 includes a first electrode surface 252 and a second electrode surface 254 away from each other, the first electrode surface 252 is adjacent to the light-emitting surface 20a, the second electrode surface 254 is away from the light-emitting surface 20a, and the first light-emitting layer 270 is arranged on the second electrode surface 254.

[0041] The second lamp module 30 may include a second pixel electrode 350 and a second light-emitting layer 370, the second pixel electrode 350 includes a third electrode surface 352 and a fourth electrode surface 354 far away from each other, the third electrode surface 352 is adjacent to the light-emitting surface 30a, the fourth electrode surface 354 is far away from the light-emitting surface 30a, and the second light-emitting layer 370 is arranged on the fourth electrode surface 354.

[0042] The second lamp module 30 is tilted relative to the first lamp module 20, and both the third electrode surface 352 and the fourth electrode surface 354 of the second pixel electrode 350 of the second lamp module 30 are curved. The curved configuration of the third electrode surface 352 and the fourth electrode surface 354 changes the light emission and focusing direction of the second light-emitting layer 370 above them, ensuring that the maximum light emission direction of the second lamp module 30 is the same or substantially the same as the maximum light emission direction of the first lamp module 20, thereby improving the uniformity of light emission across different areas of the lamp.

[0043] In a specific implementation, the inclination of the third electrode surface 352 and the fourth electrode surface 354 can be designed based on the relative inclination of the second lamp module 30. Generally speaking, the greater the inclination of the second lamp module 30 relative to the first lamp module 20, the greater the inclination of the third electrode surface 352 and the fourth electrode surface 354 can be set.

[0044] The middle area of ​​the third electrode surface 352 and / or the fourth electrode surface 354 can protrude toward the light emitting surface 30a, so that the third electrode surface 352 and the fourth electrode surface 354 as a whole protrude toward the light emitting surface 30a. In other embodiments, multiple protruding areas and recessed areas can also be provided to make the curved surface generally corrugated according to the needs of light output adjustment.

[0045] Because the light-emitting surface 20a of the first lamp module 20 faces the rear of the headlight, its maximum light-emitting angle already faces the rear of the headlight, and thus there is no need to adjust the light-emitting direction of the first lamp module 20. That is, the first electrode surface 252 and the second electrode surface 254 of the first lamp module 20 can be maintained as flat surfaces. In other embodiments, if the light-emitting surface 20a of the first lamp module 20 does not face the rear of the headlight, the first electrode surface 252 and the second electrode surface 254 can be configured as curved surfaces to adjust the light-emitting direction of the first lamp module 20 so that the maximum light-emitting direction of the first lamp module 20 faces the rear of the headlight.

[0046] Continuing with Figures 4A and 4B, the first lamp module 20 may further include a first substrate 210, a first pixel defining layer 260, and a first encapsulation layer 290. The first pixel defining layer 260 and the first pixel electrode 250 are disposed on the first substrate 210, and a first groove (not shown) is disposed within the first pixel defining layer 260. At least a portion of the first light-emitting layer 270 is disposed within the first groove and is located on a side of the first pixel electrode 250 away from the first substrate 210. The first encapsulation layer 290 covers the first pixel defining layer 260 and the first light-emitting layer 270.

[0047] A first cathode (not shown) may also be disposed between the first encapsulation layer 290 and the first light-emitting layer 270. The first cathode and the first pixel electrode 250 are located on either side of the first light-emitting layer 270 and are used to control the light emission of the first light-emitting layer 270 under the action of voltage and current. In some cases, the first cathode can also be considered as part of the first light-emitting layer 270.

[0048] The first lamp module 20 may also include a first metal connection layer 230, a first insulating layer 240 and a first metal bump 252. The first insulating layer 240 covers the first metal connection layer 230. The first insulating layer 240 is provided with a first through hole (not shown in the figure). The first metal bump 252 is filled in the first through hole and is electrically connected to the first metal connection layer 230. The first pixel defining layer 260 covers the first metal bump 252 and the first insulating layer 240. The first metal bump 252 provided below can be connected to the first pixel electrode 250, and the first metal bump 252 can be electrically connected to the outside through the first encapsulation layer 290. The above-mentioned first metal bump 252 and the first metal connection layer 230 can be used to electrically connect the first pixel electrode 250 to the outside.

[0049] The first lamp module 20 may further include a first driving circuit (not shown) for driving the first light-emitting layer 270 to emit light. The first driving circuit may be a relatively independent device and may be installed on a side of the first encapsulation layer 290 away from the first substrate 210 after the first encapsulation layer 290 is formed. The first driving circuit may also be integrated between the first substrate 210 and the first pixel electrode 250.

[0050] The second lamp module 30 may also include a second substrate 310, a passivation layer 315, a second pixel defining layer 360, and a second encapsulation layer 390. The passivation layer 315 is disposed on the second substrate 310, and the second pixel defining layer 360 and the second pixel electrode 350 are disposed on the side of the passivation layer 315 away from the second substrate 310. The surface of the passivation layer 315 adjacent to the second pixel electrode 350 includes or is a curved surface; the above-mentioned curved surface of the passivation layer 315 is consistent with the third electrode surface 352. A second groove (not shown in the figure) is provided in the second pixel defining layer 360. At least a portion of the second light-emitting layer 370 is disposed in the second groove and is located on the side of the second pixel electrode 350 away from the second substrate 310. The second encapsulation layer 390 covers the second pixel defining layer 360 and the second light-emitting layer 370.

[0051] The provision of the passivation layer 315 facilitates the formation of the third electrode surface 352. For example, before forming the second pixel electrode 350, the upper surface of the passivation layer 315 can be etched (including dry etching and wet etching) to form a curved surface. Subsequently, the conformal second pixel electrode 350 is formed on the passivation layer 315, and the third electrode surface 352 and fourth electrode surface 354 of the second pixel electrode 350 naturally form curved surfaces.

[0052] A second cathode (not shown) may also be disposed between the second encapsulation layer 390 and the second light-emitting layer 370. The second cathode and the second pixel electrode 350 are located on either side of the second light-emitting layer 370 and are used to control the light emission of the second light-emitting layer 370 under the action of voltage and current. In some cases, the second cathode can also be considered part of the second light-emitting layer 370.

[0053] The second lamp module 30 may further include a second metal connection layer 330, a second insulating layer 340, and a second metal bump 352. The second insulating layer 340 covers the second metal connection layer 330. The second insulating layer 340 defines a second through hole (not shown). The second metal bump 352 is filled in the second through hole and electrically connected to the second metal connection layer 330.

[0054] The second pixel defining layer 360 covers the second metal bump 352 and the second insulating layer 340. The second metal bump 352 disposed thereunder can be connected to the second pixel electrode 350, and the second metal bump 352 can subsequently be electrically connected to the outside through the second encapsulation layer 390. The second metal bump 352 and the second metal connection layer 330 can be used to electrically connect the second pixel electrode 350 to the outside.

[0055] The second lamp module 30 may further include a second driving circuit (not shown) for driving the second light-emitting layer 370 to emit light. The second driving circuit may be a relatively independent device and may be installed on a side of the second encapsulation layer 390 away from the second substrate 310 after the second encapsulation layer 390 is formed. The second driving circuit may also be integrated between the second substrate 310 and the second pixel electrode 350.

[0056] Furthermore, the manufacturing method of the first lamp module 20 may include the following steps:

[0057] Step S21: providing a first substrate 210. The first substrate 210 may be glass or a PI flexible substrate, preferably glass.

[0058] Step S23: forming a first metal material layer on the first substrate 210. The first metal material layer may be made of a Ti / Al / Ti (titanium-aluminum-titanium) metal laminate or a Mo / Al / Mo (molybdenum-aluminum-molybdenum) metal laminate.

[0059] Step S24: forming a mask pattern above a partial area of ​​the first metal material layer, wherein the mask pattern may be a photoresist pattern.

[0060] Step S25 : using an etching process to remove the first metal material layer not covered by the mask pattern, and the remaining first metal material layer after etching serves as the first metal connection layer 230 .

[0061] If the first metal material layer is a Ti / Al / Ti stack, a dry etching process can be used to etch the first metal material layer. During the dry etching process, controlling the etching gas flow F1, power P1, and pressure PR1 can effectively remove the first metal material layer not covered by the mask pattern.

[0062] If the first metal material layer is a Mo / Al / Mo stack, a wet etching process can be used to etch the first metal material layer. During the wet etching process, the first metal material layer not covered by the mask pattern can be removed preferably by controlling the etching solution temperature TC1 and the etching time T1.

[0063] Step S26: The first insulating layer 240, the first metal bump 252, and the first pixel electrode 250 are sequentially formed on the first metal connection layer 230 and the first substrate 210. The first metal bump 252 and the first pixel electrode 250 can be made of the same material (for example, both can be made of ITO) and can be formed in the same step.

[0064] Step S27 : covering the first insulating layer 240 and the first metal bump 252 with the first pixel defining layer 260 , and filling the first groove of the first pixel defining layer 260 with the first light emitting layer 270 .

[0065] Step S28 : covering the first pixel defining layer 260 and the first light emitting layer 270 with a first encapsulation layer 290 .

[0066] The manufacturing method of the second lamp module 30 may include the following steps:

[0067] Step S31: providing a second substrate 310. The second substrate 310 may be glass or a PI flexible substrate, preferably glass.

[0068] Step S32: forming a passivation layer 315 on the second substrate 310. The passivation layer 315 may be made of silicon nitride, silicon oxide, or silicon oxynitride, preferably silicon nitride.

[0069] Step S33: forming a second metal material layer on the passivation layer 315. The second metal material layer may be made of a Ti / Al / Ti (titanium-aluminum-titanium) metal stack or a Mo / Al / Mo (molybdenum-aluminum-molybdenum) metal stack.

[0070] Step S34: forming a mask pattern above a partial area of ​​the second metal material layer, wherein the mask pattern may be a photoresist pattern.

[0071] Step S35: An etching process is used to remove the second metal material layer not covered by the mask pattern. The remaining second metal material layer after etching serves as the second metal connection layer 330. After the second metal material layer is completely removed, the exposed surface of the passivation layer 315 is further etched to form a curved surface. The etching rate is faster in the central area, resulting in a concave surface with a lower center and higher edges.

[0072] If the material of the second metal material layer is a Ti / Al / Ti stack, a dry etching process can be used to etch the surface of the second metal material layer and the passivation layer 315. The desired surface morphology of the passivation layer 315 can be obtained by controlling the etching gas flow F, power P, and pressure PR. In one embodiment, F2 is 1.3 to 1.7 times that of F1. For example, F2 = 1.3*F1, 1.4*F1, 1.5*F1, 1.6*F1 or 1.7*F1. Among them, F2 is the etching gas flow for etching the second metal material layer in the process of forming the second lamp module 30, and F1 is the etching gas flow for etching the first metal material layer in the process of forming the first lamp module 20. In one embodiment, P2 is 1.3 to 1.7 times that of P1. For example, P2 = 1.3*P1, 1.4*P1, 1.5*P1, 1.6*P1 or 1.7*P1. Wherein, P2 is the power for etching the second metal material layer during the formation of the second lamp module 30, and P1 is the power for etching the first metal material layer during the formation of the first lamp module 20. In one embodiment, PR2 is 1.3 to 1.7 times greater than PR1. For example, PR2 = 1.3*PR1, 1.4*PR1, 1.5*PR1, 1.6*PR1, or 1.7*PR1. Wherein, PR2 is the pressure for etching the second metal material layer during the formation of the second lamp module 30, and PR1 is the pressure for etching the first metal material layer during the formation of the first lamp module 20.

[0073] If the material of the second metal material layer is a Mo / Al / Mo stack, a wet etching process can be used to etch the surface of the second metal material layer and the passivation layer 315. The desired surface morphology of the passivation layer 315 can be obtained by controlling the etching solution temperature TC and the etching time T. In one embodiment, TC2 is 1.3 to 1.7 times of TC1. For example, TC2 = 1.3*TC1, 1.4*TC1, 1.5*TC1, 1.6*TC1 or 1.7*TC1. Among them, TC2 is the etching solution temperature for etching the second metal material layer in the process of forming the second lamp module 30, and TC1 is the etching solution temperature for etching the first metal material layer in the process of forming the first lamp module 20. In one embodiment, T2 is 1.3 to 1.7 times of T1. For example, T2 = 1.3*T1, 1.4*T1, 1.5*T1, 1.6*T1 or 1.7*T1. T2 is the etching time of the second metal material layer during the process of forming the second lamp module 30 , and T1 is the etching time of the first metal material layer during the process of forming the first lamp module 20 .

[0074] Step S36: The second insulating layer 340, the second metal bump 352, and the second pixel electrode 350 are sequentially formed on the second metal connection layer 330 and the passivation layer 315. The second metal bump 352 and the second pixel electrode 350 can be made of the same material (for example, both can be ITO) and can be formed in the same step.

[0075] Step S37 : covering the second insulating layer 340 and the second metal bump 352 with a second pixel defining layer 360 , and filling the second groove of the second pixel defining layer 360 with a second light emitting layer 370 .

[0076] Step S38 : covering the second pixel defining layer 360 and the second light emitting layer 370 with a second encapsulation layer 390 .

[0077] FIG5 is a schematic diagram of the structure of another embodiment of the vehicle lamp of the present application. The only difference between the vehicle lamp and the vehicle lamp shown in FIG3 is that a second lamp module 30 is provided on both sides of the first lamp module 20. The first lamp module 20 is arranged horizontally, with one second lamp module 30 connected to the left side of the first lamp module 20 and arranged upwardly and obliquely relative to the first lamp module 20; the other second lamp module 30 is connected to the right side of the first lamp module 20 and arranged upwardly and obliquely relative to the first lamp module 20. The structures of the first lamp module 20 and the second lamp module 30 can be the same as those of the previous embodiment, as shown in FIG4A and FIG4B.

[0078] Fig. 6 is a schematic diagram of the structure of a vehicle lamp according to another embodiment of the present application. Fig. 7A, Fig. 7B and Fig. 7C are schematic diagrams of the structures of the first, second and third lamp modules of the vehicle lamp shown in Fig. 6, respectively.

[0079] As shown in Figures 6, 7A, 7B and 7C, the headlight may include a first lamp module 20, a second lamp module 30 and a third lamp module 40. The first lamp module 20 can be arranged horizontally so that the light-emitting surface 20a of the first lamp module 20 faces the rear of the headlight. The second lamp module 30 can be connected to one side of the first lamp module 20 and tilted relative to the first lamp module 20, so that the light-emitting surface 30a of the second lamp module 30 is tilted to the rear of the headlight, and the normal L30 perpendicular to the light-emitting surface 30a is also tilted to the rear of the headlight. The third lamp module 40 can be connected to the side of the second lamp module 30 away from the first lamp module 20. The third lamp module 40 is tilted relative to the first lamp module 20, and the tilt angle is larger than the tilt angle of the second lamp module 30. The light-emitting surface 40a of the third lamp module 40 is diagonally facing the rear of the headlight. The normal line L40 perpendicular to the light-emitting surface 40a is also diagonally facing the rear of the headlight, but at a greater angle. The light-emitting surface 20a of the first lamp module 20, the light-emitting surface 30a of the second lamp module 30, and the light-emitting surface 40a of the third lamp module 40 together constitute the light-emitting surface of the headlight. Because the first lamp module 20 is horizontally arranged, and the second and third lamp modules 30 and 40 are tilted, and the tilt angle of the third lamp module 40 is greater than that of the second lamp module 30, the entire light-emitting surface of the headlight is an outwardly convex curved surface.

[0080] By setting the first lamp module 20, the second lamp module 30 and the third lamp module 40 with specific shapes, their maximum light emission angles can be directed directly or approximately directly to the rear of the headlight, thereby ensuring the uniformity of light emission in each area of ​​the headlight. Among them, the maximum light emission direction of the first lamp module 20 can be the direction of its normal L20, the maximum light emission direction of the second lamp module 30 can be at an angle α to the direction of its normal L30, and the maximum light emission direction of the third lamp module 40 can be at an angle β to the direction of its normal L40, and the angle β is greater than the angle α. The value range of angle α can be 40°-55°. For example, 40°, 45°, 50° or 55°. The value range of angle β can be 60°-75°. For example, 60°, 65°, 70° or 75°. Among them, the angle α can also be regarded as the angle between the second lamp module 30 and the first lamp module 20 (that is, the angle at which the second lamp module 30 is tilted relative to the first lamp module 20), and the angle β can be regarded as the angle between the extension line of the third lamp module 40 and the first lamp module 20 (that is, the angle at which the third lamp module 40 is tilted relative to the first lamp module 20).

[0081] To achieve the above-mentioned purpose, the first lamp module 20 may include a first pixel electrode 250 and a first light-emitting layer 270, the first pixel electrode 250 includes a first electrode surface 252 and a second electrode surface 254 away from each other, the first electrode surface 252 is adjacent to the light-emitting surface 20a, the second electrode surface 254 is away from the light-emitting surface 20a, and the first light-emitting layer 270 is arranged on the second electrode surface 254.

[0082] The second lamp module 30 may include a second pixel electrode 350 and a second light-emitting layer 370, the second pixel electrode 350 includes a third electrode surface 352 and a fourth electrode surface 354 far away from each other, the third electrode surface 352 is adjacent to the light-emitting surface 30a, the fourth electrode surface 354 is far away from the light-emitting surface 30a, and the second light-emitting layer 370 is arranged on the fourth electrode surface 354.

[0083] The third lamp module 40 may include a third pixel electrode 450 and a third light-emitting layer 470, the third pixel electrode 450 includes a fifth electrode surface 452 and a sixth electrode surface 454 far away from each other, the fifth electrode surface 452 is adjacent to the light-emitting surface 40a, the sixth electrode surface 454 is far away from the light-emitting surface 40a, and the third light-emitting layer 470 is arranged on the sixth electrode surface 454.

[0084] The second and third lamp modules 30, 40 are both tilted relative to the first lamp module 20. The third electrode surface 352 and the fourth electrode surface 354 of the second pixel electrode 350 of the second lamp module 30 are both curved surfaces. The fifth electrode surface 452 and the sixth electrode surface 454 of the third pixel electrode 450 of the third lamp module 40 are both curved surfaces. The angle at which the third lamp module 40 is tilted relative to the first lamp module 20 is greater than the angle at which the second lamp module 30 is tilted relative to the first lamp module 20. Accordingly, the curvature of the fifth and sixth electrode surfaces 452, 454 is greater than the curvature of the third and fourth electrode surfaces 352, 354. The curved surface setting of the third electrode surface 352, the fourth electrode surface 354, the fifth electrode surface 452 and the sixth electrode surface 454 can change the light emitting and focusing directions of the second light emitting layer 370 and the third light emitting layer 470, so that the maximum light emitting direction of the second lamp module 30 and the maximum light emitting direction of the third lamp module 40 are the same or substantially the same as the maximum light emitting direction of the first lamp module 20, thereby improving the uniformity of the light emitting brightness of each area of ​​the car lamp.

[0085] In a specific implementation, the inclination of the third electrode surface 352 and the fourth electrode surface 354, and the fifth electrode surface 452 and the sixth electrode surface 454 can be designed based on the relative inclination of the second lamp module 30 and the third lamp module 40. Generally speaking, the greater the inclination of the second lamp module 30 (third lamp module 40) relative to the first lamp module 20, the greater the inclination of the third electrode surface 352 and the fourth electrode surface 354 (the fifth electrode surface 452 and the sixth electrode surface 454) can be set.

[0086] The middle area of ​​the third electrode surface 352 and / or the fourth electrode surface 354 can protrude toward the light emitting surface 30a, so that the third electrode surface 352 and the fourth electrode surface 354 as a whole protrude toward the light emitting surface 30a. In other embodiments, multiple protruding areas and recessed areas can also be provided to make the curved surface generally corrugated according to the needs of light output adjustment.

[0087] The middle area of ​​the fifth electrode surface 452 and / or the sixth electrode surface 454 may protrude toward the light emitting surface 40a, so that the fifth electrode surface 452 and the sixth electrode surface 454 as a whole protrude toward the light emitting surface 40a. In other embodiments, multiple protruding areas and recessed areas may be provided to make the curved surface generally corrugated, depending on the need for light output adjustment.

[0088] Because the light-emitting surface 20a of the first lamp module 20 faces the rear of the headlight, its maximum light-emitting angle already faces the rear of the headlight, and thus there is no need to adjust the light-emitting direction of the first lamp module 20. That is, the first electrode surface 252 and the second electrode surface 254 of the first lamp module 20 can be maintained as flat surfaces. In other embodiments, if the light-emitting surface 20a of the first lamp module 20 does not face the rear of the headlight, the first electrode surface 252 and the second electrode surface 254 can be configured as curved surfaces to adjust the light-emitting direction of the first lamp module 20 so that the maximum light-emitting direction of the first lamp module 20 faces the rear of the headlight.

[0089] Continuing with Figures 7A, 7B, and 7C, the first lamp module 20 may further include a first substrate 210, a first pixel defining layer 260, and a first encapsulation layer 290. The first pixel defining layer 260 and the first pixel electrode 250 are disposed on the first substrate 210, and a first groove (not shown) is disposed in the first pixel defining layer 260. At least a portion of the first light-emitting layer 270 is disposed in the first groove and is located on a side of the first pixel electrode 250 away from the first substrate 210. The first encapsulation layer 290 covers the first pixel defining layer 260 and the first light-emitting layer 270.

[0090] A first cathode (not shown) may also be disposed between the first encapsulation layer 290 and the first light-emitting layer 270. The first cathode and the first pixel electrode 250 are located on either side of the first light-emitting layer 270 and are used to control the light emission of the first light-emitting layer 270 under the action of voltage and current. In some cases, the first cathode can also be considered as part of the first light-emitting layer 270.

[0091] The first lamp module 20 may also include a first metal connection layer 230, a first insulating layer 240 and a first metal bump 252. The first insulating layer 240 covers the first metal connection layer 230. The first insulating layer 240 is provided with a first through hole (not shown in the figure). The first metal bump 252 is filled in the first through hole and is electrically connected to the first metal connection layer 230. The first pixel defining layer 260 covers the first metal bump 252 and the first insulating layer 240. The first metal bump 252 provided below can be connected to the first pixel electrode 250, and the first metal bump 252 can be electrically connected to the outside through the first encapsulation layer 290. The above-mentioned first metal bump 252 and the first metal connection layer 230 can be used to electrically connect the first pixel electrode 250 to the outside.

[0092] The first lamp module 20 may further include a first driving circuit (not shown) for driving the first light-emitting layer 270 to emit light. The first driving circuit may be a relatively independent device and may be installed on a side of the first encapsulation layer 290 away from the first substrate 210 after the first encapsulation layer 290 is formed. The first driving circuit may also be integrated between the first substrate 210 and the first pixel electrode 250.

[0093] The second lamp module 30 may also include a second substrate 310, a passivation layer 315, a second pixel defining layer 360, and a second encapsulation layer 390. The passivation layer 315 is disposed on the second substrate 310, and the second pixel defining layer 360 and the second pixel electrode 350 are disposed on the side of the passivation layer 315 away from the second substrate 310. The surface of the passivation layer 315 adjacent to the second pixel electrode 350 includes or is a curved surface; the above-mentioned curved surface of the passivation layer 315 is consistent with the third electrode surface 352. A second groove (not shown in the figure) is provided in the second pixel defining layer 360. At least a portion of the second light-emitting layer 370 is disposed in the second groove and is located on the side of the second pixel electrode 350 away from the second substrate 310. The second encapsulation layer 390 covers the second pixel defining layer 360 and the second light-emitting layer 370.

[0094] The provision of the passivation layer 315 facilitates the formation of the third electrode surface 352. For example, before forming the second pixel electrode 350, the upper surface of the passivation layer 315 can be etched (including dry etching and wet etching) to form a curved surface. Subsequently, the conformal second pixel electrode 350 is formed on the passivation layer 315, and the third electrode surface 352 and fourth electrode surface 354 of the second pixel electrode 350 naturally form curved surfaces.

[0095] A second cathode (not shown) may also be disposed between the second encapsulation layer 390 and the second light-emitting layer 370. The second cathode and the second pixel electrode 350 are located on either side of the second light-emitting layer 370 and are used to control the light emission of the second light-emitting layer 370 under the action of voltage and current. In some cases, the second cathode can also be considered part of the second light-emitting layer 370.

[0096] The second lamp module 30 may further include a second metal connection layer 330, a second insulating layer 340, and a second metal bump 352. The second insulating layer 340 covers the second metal connection layer 330. The second insulating layer 340 defines a second through hole (not shown). The second metal bump 352 is filled in the second through hole and electrically connected to the second metal connection layer 330.

[0097] The second pixel defining layer 360 covers the second metal bump 352 and the second insulating layer 340. The second metal bump 352 disposed thereunder can be connected to the second pixel electrode 350, and the second metal bump 352 can subsequently be electrically connected to the outside through the second encapsulation layer 390. The second metal bump 352 and the second metal connection layer 330 can be used to electrically connect the second pixel electrode 350 to the outside.

[0098] The second lamp module 30 may further include a second driving circuit (not shown) for driving the second light-emitting layer 370 to emit light. The second driving circuit may be a relatively independent device and may be installed on a side of the second encapsulation layer 390 away from the second substrate 310 after the second encapsulation layer 390 is formed. The second driving circuit may also be integrated between the second substrate 310 and the second pixel electrode 350.

[0099] The third lamp module 40 may further include a third substrate 410, a passivation layer 415, a third pixel defining layer 460, and a third encapsulation layer 490. The passivation layer 415 is disposed on the third substrate 410, and the third pixel defining layer 460 and the third pixel electrode 450 are disposed on the side of the passivation layer 415 away from the third substrate 410. The surface of the passivation layer 415 adjacent to the third pixel electrode 450 includes or is a curved surface; the above-mentioned curved surface of the passivation layer 415 is consistent with the fifth electrode surface 452. A third groove (not shown in the figure) is disposed in the third pixel defining layer 460. At least a portion of the third light-emitting layer 470 is disposed in the third groove and is located on the side of the third pixel electrode 450 away from the third substrate 410. The third encapsulation layer 490 covers the third pixel defining layer 460 and the third light-emitting layer 470.

[0100] The provision of the passivation layer 415 facilitates the formation of the fifth electrode surface 452. For example, before forming the third pixel electrode 450, the upper surface of the passivation layer 415 can be etched (including dry etching and wet etching) to form a curved surface. Then, a conformal third pixel electrode 450 is formed on the passivation layer 415. The fifth electrode surface 452 and the sixth electrode surface 454 of the third pixel electrode 450 naturally form curved surfaces.

[0101] A third cathode (not shown) may also be disposed between the third encapsulation layer 490 and the third light-emitting layer 470. The third cathode and the third pixel electrode 450 are located on either side of the third light-emitting layer 470 and are used to control the light emission of the third light-emitting layer 470 under the action of voltage and current. In some cases, the third cathode can also be considered as part of the third light-emitting layer 470.

[0102] The third lamp module 40 may further include a third metal connection layer 430, a third insulating layer 440, and a third metal bump 452. The third insulating layer 440 covers the third metal connection layer 430. The third insulating layer 440 defines a third through hole (not shown). The third metal bump 452 fills the third through hole and is electrically connected to the third metal connection layer 430.

[0103] The third pixel defining layer 460 covers the third metal bump 452 and the third insulating layer 440. The third metal bump 452 disposed thereunder can be connected to the third pixel electrode 450, which can then be electrically connected to the outside through the third encapsulation layer 490. The third metal bump 452 and the third metal connection layer 430 can be used to electrically connect the second pixel electrode 450 to the outside.

[0104] The third lamp module 40 may further include a third driving circuit (not shown) for driving the third light-emitting layer 470 to emit light. The third driving circuit may be a relatively independent device and may be installed on a side of the third encapsulation layer 490 away from the third substrate 410 after the third encapsulation layer 490 is formed. The third driving circuit may also be integrated between the third substrate 410 and the third pixel electrode 450.

[0105] Furthermore, the manufacturing method of the first lamp module 20 may include the following steps:

[0106] Step S21: providing a first substrate 210. The first substrate 210 may be glass or a PI flexible substrate, preferably glass.

[0107] Step S23: forming a first metal material layer on the first substrate 210. The first metal material layer may be made of a Ti / Al / Ti (titanium-aluminum-titanium) metal laminate or a Mo / Al / Mo (molybdenum-aluminum-molybdenum) metal laminate.

[0108] Step S24: forming a mask pattern above a partial area of ​​the first metal material layer, wherein the mask pattern may be a photoresist pattern.

[0109] Step S25 : using an etching process to remove the first metal material layer not covered by the mask pattern, and the remaining first metal material layer after etching serves as the first metal connection layer 230 .

[0110] If the first metal material layer is a Ti / Al / Ti stack, a dry etching process can be used to etch the first metal material layer. During the dry etching process, controlling the etching gas flow F1, power P1, and pressure PR1 can effectively remove the first metal material layer not covered by the mask pattern.

[0111] If the first metal material layer is a Mo / Al / Mo stack, a wet etching process can be used to etch the first metal material layer. During the wet etching process, the first metal material layer not covered by the mask pattern can be removed preferably by controlling the etching solution temperature TC1 and the etching time T1.

[0112] Step S26: The first insulating layer 240, the first metal bump 252, and the first pixel electrode 250 are sequentially formed on the first metal connection layer 230 and the first substrate 210. The first metal bump 252 and the first pixel electrode 250 can be made of the same material (for example, both can be made of ITO) and can be formed in the same step.

[0113] Step S27 : covering the first insulating layer 240 and the first metal bump 252 with the first pixel defining layer 260 , and filling the first groove of the first pixel defining layer 260 with the first light emitting layer 270 .

[0114] Step S28 : covering the first pixel defining layer 260 and the first light emitting layer 270 with a first encapsulation layer 290 .

[0115] The manufacturing method of the second lamp module 30 may include the following steps:

[0116] Step S31: providing a second substrate 310. The second substrate 310 may be glass or a PI flexible substrate, preferably glass.

[0117] Step S32: forming a passivation layer 315 on the second substrate 310. The passivation layer 315 may be made of silicon nitride, silicon oxide, or silicon oxynitride, preferably silicon nitride.

[0118] Step S33: forming a second metal material layer on the passivation layer 315. The second metal material layer may be made of a Ti / Al / Ti (titanium-aluminum-titanium) metal stack or a Mo / Al / Mo (molybdenum-aluminum-molybdenum) metal stack.

[0119] Step S34: forming a mask pattern above a partial area of ​​the second metal material layer, wherein the mask pattern may be a photoresist pattern.

[0120] Step S35: An etching process is used to remove the second metal material layer not covered by the mask pattern. The remaining second metal material layer after etching serves as the second metal connection layer 330. After the second metal material layer is completely removed, the exposed surface of the passivation layer 315 is further etched to form a curved surface. The etching rate is faster in the central area, resulting in a concave surface with a lower center and higher edges.

[0121] If the material of the second metal material layer is a Ti / Al / Ti stack, a dry etching process can be used to etch the surface of the second metal material layer and the passivation layer 315. The desired surface morphology of the passivation layer 315 can be obtained by controlling the etching gas flow F, power P, and pressure PR. In one embodiment, F2 is 1.3 to 1.7 times that of F1. For example, F2 = 1.3*F1, 1.4*F1, 1.5*F1, 1.6*F1 or 1.7*F1. Among them, F2 is the etching gas flow for etching the second metal material layer in the process of forming the second lamp module 30, and F1 is the etching gas flow for etching the first metal material layer in the process of forming the first lamp module 20. In one embodiment, P2 is 1.3 to 1.7 times that of P1. For example, P2 = 1.3*P1, 1.4*P1, 1.5*P1, 1.6*P1 or 1.7*P1. Wherein, P2 is the power for etching the second metal material layer during the formation of the second lamp module 30, and P1 is the power for etching the first metal material layer during the formation of the first lamp module 20. In one embodiment, PR2 is 1.3 to 1.7 times greater than PR1. For example, PR2 = 1.3*PR1, 1.4*PR1, 1.5*PR1, 1.6*PR1, or 1.7*PR1. Wherein, PR2 is the pressure for etching the second metal material layer during the formation of the second lamp module 30, and PR1 is the pressure for etching the first metal material layer during the formation of the first lamp module 20.

[0122] If the material of the second metal material layer is a Mo / Al / Mo stack, a wet etching process can be used to etch the surface of the second metal material layer and the passivation layer 315. The desired surface morphology of the passivation layer 315 can be obtained by controlling the etching solution temperature TC and the etching time T. In one embodiment, TC2 is 1.3 to 1.7 times of TC1. For example, TC2 = 1.3*TC1, 1.4*TC1, 1.5*TC1, 1.6*TC1 or 1.7*TC1. Among them, TC2 is the etching solution temperature for etching the second metal material layer in the process of forming the second lamp module 30, and TC1 is the etching solution temperature for etching the first metal material layer in the process of forming the first lamp module 20. In one embodiment, T2 is 1.3 to 1.7 times of T1. For example, T2 = 1.3*T1, 1.4*T1, 1.5*T1, 1.6*T1 or 1.7*T1. T2 is the etching time of the second metal material layer during the process of forming the second lamp module 30 , and T1 is the etching time of the first metal material layer during the process of forming the first lamp module 20 .

[0123] Step S36: The second insulating layer 340, the second metal bump 352, and the second pixel electrode 350 are sequentially formed on the second metal connection layer 330 and the passivation layer 315. The second metal bump 352 and the second pixel electrode 350 can be made of the same material (for example, both can be ITO) and can be formed in the same step.

[0124] Step S37 : covering the second insulating layer 340 and the second metal bump 352 with a second pixel defining layer 360 , and filling the second groove of the second pixel defining layer 360 with a second light emitting layer 370 .

[0125] Step S38 : covering the second pixel defining layer 360 and the second light emitting layer 370 with a second encapsulation layer 390 .

[0126] The manufacturing method of the third lamp module 40 may include the following steps:

[0127] Step S41: providing a third substrate 410. The third substrate 410 may be glass or a PI flexible substrate, preferably glass.

[0128] Step S42: forming a passivation layer 415 on the third substrate 410. The passivation layer 415 may be made of silicon nitride, silicon oxide, or silicon oxynitride, preferably silicon nitride.

[0129] Step S43: forming a third metal material layer on the passivation layer 415. The third metal material layer may be made of a Ti / Al / Ti (titanium-aluminum-titanium) metal stack or a Mo / Al / Mo (molybdenum-aluminum-molybdenum) metal stack.

[0130] Step S44: forming a mask pattern above a partial area of ​​the third metal material layer, wherein the mask pattern may be a photoresist pattern.

[0131] Step S45: An etching process is used to remove the third metal material layer not covered by the mask pattern. The remaining third metal material layer after etching serves as the third metal connection layer 430. After the third metal material layer is completely removed, the exposed surface of the passivation layer 415 is further etched to form a curved surface. The etching rate is faster in the central region, resulting in a concave surface with a lower center and higher edges.

[0132] If the material of the third metal material layer is a Ti / Al / Ti stack, a dry etching process can be used to etch the surface of the third metal material layer and the passivation layer 415. The desired surface morphology of the passivation layer 415 can be obtained by controlling the etching gas flow F, power P, and pressure PR. In one embodiment, F3 is 1.8 to 2.2 times that of F1. For example, F3 = 1.8*F1, 1.9*F1, 2.0*F1, 2.1*F1 or 2.2*F1. Among them, F3 is the etching gas flow for etching the third metal material layer in the process of forming the third lamp module 40, and F1 is the etching gas flow for etching the first metal material layer in the process of forming the first lamp module 20. In one embodiment, P3 is 1.8 to 2.2 times that of P1. For example, P3 = 1.8*P1, 1.9*P1, 2.0*P1, 2.1*P1 or 2.2*P1. Wherein, P3 is the power for etching the third metal material layer during the process of forming the third lamp module 40, and P1 is the power for etching the first metal material layer during the process of forming the first lamp module 20. In one embodiment, PR3 is 1.8 to 2.2 times PR1. For example, PR3 = 1.8*PR1, 1.9*PR1, 2.0*PR1, 2.1*PR1 or 2.2*PR1. Wherein, PR3 is the pressure for etching the third metal material layer during the process of forming the third lamp module 40, and PR1 is the pressure for etching the first metal material layer during the process of forming the first lamp module 20.

[0133] If the material of the third metal material layer is a Mo / Al / Mo stack, a wet etching process can be used to etch the surface of the third metal material layer and the passivation layer 415. The desired surface morphology of the passivation layer 415 can be obtained by controlling the etching solution temperature TC and the etching time T. In one embodiment, TC3 is 1.8 to 2.2 times of TC1. For example, TC3 = 1.8*TC1, 1.9*TC1, 2.0*TC1, 2.1*TC1 or 2.2*TC1. Among them, TC3 is the etching solution temperature for etching the third metal material layer in the process of forming the third lamp module 40, and TC1 is the etching solution temperature for etching the first metal material layer in the process of forming the first lamp module 20. In one embodiment, T3 is 1.8 to 2.2 times of T1. For example, T3 = 1.8*T1, 1.9*T1, 2.0*T1, 2.1*T1 or 2.2*T1. T3 is the etching time of the third metal material layer during the process of forming the third lamp module 40 , and T1 is the etching time of the first metal material layer during the process of forming the first lamp module 20 .

[0134] Step S46: The third insulating layer 440, the third metal bump 452, and the third pixel electrode 450 are sequentially formed above the third metal connection layer 430 and the passivation layer 415. The third metal bump 452 and the third pixel electrode 450 can be made of the same material (for example, both can be ITO) and can be formed in the same step.

[0135] Step S47 : covering the third insulating layer 440 and the third metal bump 452 with a third pixel defining layer 460 , and filling the third groove of the third pixel defining layer 460 with a third light emitting layer 470 .

[0136] Step S48 : covering the third pixel defining layer 460 and the third light emitting layer 470 with a third encapsulation layer 490 .

[0137] Figure 8 is a schematic diagram of the structure of another embodiment of a vehicle lamp according to the present application. This embodiment differs from the vehicle lamp shown in Figure 6 only in that a second lamp module 30 and a third lamp module 40 are provided on either side of a first lamp module 20. The structures of the first, second, and third lamp modules 20, 30, 40 are identical to those of the previous embodiment, as shown in Figures 7A, 7B, and 7C.

[0138] In the above embodiments, each lamp module 20, 30, 40 is a bottom-emitting device. The light emitted by the second light-emitting layer 370 and the third light-emitting layer 470 sequentially passes through the pixel electrodes 350, 450, the passivation layers 315, 415 and the substrates 310, 410 before reaching the rear of the headlights. Therefore, the refractive index of the above film layers can also affect the emission direction of the light to a certain extent. Generally speaking, when the refractive index n1 of the pixel electrodes 350, 450 is comparable to the refractive index n2 of the passivation layers 315, 415 (the difference between the two is less than 0.2), and both are greater than the refractive index n3 of the substrates 310, 410, the above-mentioned purpose of the invention can be achieved.

[0139] In some embodiments, the pixel electrodes 350 and 450 are made of ITO (refractive index n1 = 1.8), the passivation layers 315 and 415 are made of silicon nitride (refractive index n2 = 1.9), and the substrates 310 and 410 are made of glass (refractive index n3 = 1.5).

[0140] In the above embodiments, the first lamp module 20, the second lamp module 30, and the third lamp module 40 are each formed on their own substrates 210, 310, and 410, and encapsulated by their respective encapsulation layers 290, 390, and 490. Specifically, the first lamp module 20 is formed on the first substrate 210 and encapsulated by the first encapsulation layer 290; the second lamp module 30 is formed on the second substrate 310 and encapsulated by the second encapsulation layer 390; and the third lamp module 40 is formed on the third substrate 410 and encapsulated by the third encapsulation layer 490.

[0141] In other embodiments, the first lamp module 20 , the second lamp module 30 and the third lamp module 40 may be mounted on the same substrate and encapsulated by the same packaging layer.

[0142] In addition to the first lamp module 20, the second lamp module 30, and the third lamp module 40, the vehicle lamp may further include a base plate and a cover plate (not shown) that are assembled together. The first lamp module 20, the second lamp module 30, and the third lamp module 40 can all be accommodated within the space formed by the base plate and the cover plate, and the base plate and the cover plate protect each lamp module.

[0143] Of course, in addition to sharing the same base plate and the same cover plate, each lamp module 20, 30, 40 can also have its own base plate and cover plate, and then be spliced ​​into a whole. Specifically, the car lamp also includes an assembled first base plate and a first cover plate (not shown in the figure), an assembled second base plate and a second cover plate (not shown in the figure), and an assembled third base plate and a third cover plate (not shown in the figure). The first lamp module 20 can be accommodated in the space formed by the first base plate and the first cover plate. The second lamp module 30 can be accommodated in the space formed by the second base plate and the second cover plate. The third lamp module 40 can be accommodated in the space formed by the third base plate and the third cover plate.

[0144] In this application, the structural embodiments and method embodiments may complement each other if they do not conflict.

[0145] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The terms "plurality" and "several" refer to two or more, unless otherwise clearly defined.

[0146] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0147] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A vehicle lamp having a light emitting surface, characterized in that: The vehicle lamp comprises: A first lamp module comprises a first pixel electrode and a first light-emitting layer, wherein the first pixel electrode comprises a first electrode surface and a second electrode surface which are far away from each other, wherein the first electrode surface is adjacent to the light-emitting surface, and the second electrode surface is far away from the light-emitting surface, and the first light-emitting layer is arranged on the second electrode surface; A second lamp module comprises a second pixel electrode and a second light-emitting layer, wherein the second pixel electrode comprises a third electrode surface and a fourth electrode surface which are far away from each other, wherein the third electrode surface is adjacent to the light-emitting surface, and the fourth electrode surface is far away from the light-emitting surface, and the second light-emitting layer is arranged on the fourth electrode surface; Wherein, the second lamp module is arranged tilted relative to the first lamp module.

2. The vehicle lamp according to claim 1, characterized in that: The third electrode surface and the fourth electrode surface of the second pixel electrode are both curved surfaces.

3. The vehicle lamp according to claim 2, characterized in that: The middle area of ​​the third electrode surface and / or the fourth electrode surface protrudes toward the light emitting surface.

4. The vehicle lamp according to claim 1, characterized in that: The first electrode surface and / or the second electrode surface is a plane.

5. The vehicle lamp according to claim 1, characterized in that: The first lamp module is arranged horizontally, the second lamp module is arranged obliquely, and the light emitting surface of the vehicle lamp is in the shape of an outwardly convex curved surface.

6. The vehicle lamp according to claim 1, characterized in that: The first lamp module further includes a first substrate, a first pixel defining layer and a first encapsulation layer, the first pixel defining layer and the first pixel electrode are arranged on the first substrate, and a first groove is arranged in the first pixel defining layer; At least a portion of the first light-emitting layer is disposed in the first groove and is located on a side of the first pixel electrode away from the first substrate; The first encapsulation layer covers the first pixel defining layer and the first light emitting layer.

7. The vehicle lamp according to claim 6, characterized in that: The first lamp module further includes a first metal connection layer, a first insulating layer and a first metal bump, wherein the first insulating layer covers the first metal connection layer, the first insulating layer is provided with a first through hole, and the first metal bump is filled in the first through hole and is electrically connected to the first metal connection layer; The first pixel defining layer covers the first metal bump and the first insulating layer.

8. The vehicle lamp according to claim 1, characterized in that: The second lamp module further includes a second substrate, a passivation layer, a second pixel defining layer and a second encapsulation layer, the passivation layer is disposed on the second substrate, the second pixel defining layer and the second pixel electrode are disposed on a side of the passivation layer away from the second substrate, the surface of the passivation layer adjacent to the second pixel electrode includes a curved surface, and a second groove is disposed in the second pixel defining layer; At least a portion of the second light emitting layer is disposed in the second groove and is located on a side of the second pixel electrode away from the second substrate; The second encapsulation layer covers the second pixel defining layer and the second light emitting layer.

9. The vehicle lamp according to claim 8, characterized in that: The second lamp module further includes a second metal connection layer, a second insulating layer and a second metal bump, wherein the second insulating layer covers the second metal connection layer, the second insulating layer is provided with a second through hole, and the second metal bump is filled in the second through hole and electrically connected to the second metal connection layer; The second pixel defining layer covers the second metal bump and the second insulating layer.

10. The vehicle lamp according to claim 8, characterized in that: The refractive index of the second pixel electrode and the refractive index of the passivation layer are both greater than the refractive index of the second substrate.

11. The vehicle lamp according to claim 1, characterized in that: The vehicle lamp further comprises a third lamp module, wherein the third lamp module is connected to a side of the second lamp module away from the first lamp module; The third lamp module is tilted relative to the first lamp module, and the tilt angle of the third lamp module is greater than the tilt angle of the second lamp module; The third lamp module comprises a third pixel electrode and a third light-emitting layer, the third pixel electrode comprises a fifth electrode surface and a sixth electrode surface which are far away from each other, the fifth electrode surface is adjacent to the light-emitting surface, the sixth electrode surface is far away from the light-emitting surface, and the third light-emitting layer is arranged on the sixth electrode surface; The fifth electrode surface and the sixth electrode surface are both curved surfaces, and the curvature of the curved surfaces of the fifth electrode surface and the sixth electrode surface is greater than the curvature of the curved surfaces of the third electrode surface and the fourth electrode surface.

12. The vehicle lamp according to claim 11, characterized in that: The included angle α between the second lamp module and the first lamp module satisfies: 40°≤α≤55°; the included angle β between the extended line of the third lamp module and the first lamp module satisfies: 60°≤β≤75°.

13. The vehicle lamp according to claim 11, characterized in that: The third lamp module further includes a third substrate, a passivation layer, a third pixel defining layer and a third encapsulation layer, wherein the passivation layer is disposed on the third substrate, the third pixel defining layer and the third pixel electrode are disposed on a side of the passivation layer away from the third substrate, the surface of the passivation layer adjacent to the third pixel electrode includes a curved surface, and a third groove is disposed in the third pixel defining layer; At least a portion of the third light emitting layer is disposed in the third groove and is located at a side of the third pixel electrode away from the third substrate; The third encapsulation layer covers the third pixel defining layer and the third light emitting layer.

14. The vehicle lamp according to claim 13, characterized in that: The third lamp module further comprises a third metal connection layer, a third insulating layer and a third metal bump, wherein the third insulating layer covers the third metal connection layer, the third insulating layer is provided with a third through hole, and the third metal bump is filled in the third through hole and is electrically connected to the third metal connection layer; The third pixel defining layer covers the third metal bump and the third insulating layer.

15. The vehicle lamp according to claim 13, characterized in that: The refractive index of the third pixel electrode and the refractive index of the passivation layer are both greater than the refractive index of the third substrate.

16. The vehicle lamp according to claim 11, characterized in that: The first lamp module, the second lamp module and the third lamp module are formed on the same substrate and are encapsulated by the same encapsulation layer.

17. The vehicle lamp according to claim 11, characterized in that: The vehicle lamp further comprises a bottom plate and a cover plate which are assembled together, and the first lamp module, the second lamp module and the third lamp module are all accommodated in a space formed by the bottom plate and the cover plate; Alternatively, the vehicle lamp further includes an assembled first base plate and a first cover plate, an assembled second base plate and a second cover plate, and an assembled third base plate and a third cover plate, the first lamp module is accommodated in a space formed by the first base plate and the first cover plate, the second lamp module is accommodated in a space formed by the second base plate and the second cover plate, and the third lamp module is accommodated in a space formed by the third base plate and the third cover plate.

18. A vehicle, characterized in that: The vehicle comprises the vehicle lamp according to any one of claims 1 to 17.

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