Multifunctional vehicle lamp

Abstract

The invention belongs to the technical field of vehicle lamps, and particularly relates to a multifunctional vehicle lamp. A first electrode, a second electrode, a third electrode and a fourth electrode are sequentially arranged between a substrate and a packaging layer of the multifunctional vehicle lamp, and at least three of the four electrodes are different in pattern. One OLED light-emitting unit is arranged between every two adjacent electrodes to form three OLED light-emitting units, and the light-emitting areas of at least two OLED light-emitting units are different; each OLED light-emitting unit emits light with a corresponding peak wavelength, and at least two of the three peak wavelengths are different; and each OLED light emitting unit is independently driven. According to the multifunctional automobile lamp, a multi-layer structure is ingeniously arranged, the functional lamps of the same color but different patterns are used, the multifunctional automobile lamp effect is achieved, and it can be guaranteed that the light color is not changed at night and in the daytime. According to the multifunctional vehicle lamp, the size and the weight of the vehicle lamp are greatly reduced, and possibility is provided for reducing oil consumption, increasing the space of a trunk and expanding wider design space.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle lamps, and in particular relates to a multifunctional vehicle lamp. Background Art

[0002] The oil crisis after the 1980s caused the automotive industry to shift to a design that focuses on low energy consumption. Over time, an almost identical appearance was formed. In order to stand out from the crowd, more and more car designs have focused on headlight design. Car taillights have experienced a development from incandescent lamps to LEDs. The brightness of LEDs has enabled them to be used in both taillights and headlights. Despite this, in recent years, the uniform and homogeneous look of headlights has become increasingly popular. As a point light source, LEDs need to use optical means to increase their luminous uniformity. These additional optical designs increase the depth of the headlights, reduce luminous efficiency, and make the entire headlight light source blurred and indistinguishable.

[0003] The ideal light source for car lights should be thin, light-emitting evenly, efficient and low-power, and preferably have high contrast and a clearly recognizable appearance while being segmented. At present, as an emerging technology, OLED is increasingly showing its charm with its unique technical characteristics, cool appearance and flexible design mode. First of all, OLED is a surface light source, which has the characteristics of uniform light emission. It does not require additional optical design, which reduces the space required for car lights and greatly improves the space utilization rate on the car. Secondly, since OLED does not require the high current density of LED, it hardly generates heat when working, and does not need to be equipped with a cooling system like LED, which further saves space on the one hand and reduces power consumption on the other hand. Finally, since the optical components and cooling system are removed, the weight of the vehicle will also decrease. The use of OLED taillights can reduce the weight of the vehicle by 2-3 kg. This also indirectly reduces fuel consumption. An 18 mm thick LED light source box plus a 3 mm thick light diffusion film requires 50% more power consumption than a 0.8 mm thick OLED panel, but the uniformity of light emission is at least 25% lower than that of OLED. Moreover, OLED can be made into flexible panels, which brings endless imagination to designers and brings a new revolution to taillight design. Currently, OLED taillights have been successfully commercialized and used in high-end models such as Audi, Mercedes-Benz, BMW, and Hongqi.

[0004] In addition to being used as taillights, patent application CN103672715A discloses a high-mounted brake light made of OLED. Patent applications CN107084354A and CN107289392 both disclose an intelligent combination rear light, which includes a position light unit made of OLED and a brake light and turn signal unit made of LED. The applicant's previous application CN115675696A discloses the use of white light OLED panels as headlights for two-wheeled or three-wheeled motorcycles. However, these applications are limited to using OLED panels as lights with separate functions. Patent application CN111059512A sets multiple OLED modules behind the red lampshade, which are used as position lights, brake lights, reversing lights, and rear fog lights, respectively, but these OLED modules are arranged horizontally, which increases the overall volume.

[0005] The inventor's previous application CN115681874A also mentioned using OLED to make multiple functional lights on two-wheeled or three-wheeled motorcycles, but this integrated module also requires OLED panels with different functions (i.e. different luminous colors) to be arranged horizontally and controlled by physical methods such as flexible folding. The above-mentioned multifunctional OLED headlights are all composed of different modules arranged horizontally, which cannot reduce the volume of the entire module.

[0006] Although the patent application US5707745 mentions stacking red, green and blue OLED units in the vertical direction, the application is designed for display applications, so the area of ​​the OLED units is very small (on the order of tens of microns). Due to the limited preparation conditions and cost issues, it is not suitable to use the OLED units in the field of car lights that require large-area lighting. In addition, OLED units of different colors are prepared using a common mask, so that although each unit has different luminous colors, the luminous areas (luminous patterns) of the three colors are the same; more importantly, in order to achieve color tunability or white light, the light colors of the three luminous units are completely different and must contain the three basic colors of red, green and blue or red, yellow and blue.

[0007] The present invention integrates at least two of the red light taillight, yellow light turn signal, brake light and reversing light of OLED materials in the vertical direction of a substrate, and the luminous areas or luminous regions of at least two functional lights are different, so as to obtain a multifunctional car light with smaller volume and weight. Summary of the invention

[0008] The present invention aims to provide a multifunctional vehicle lamp to solve the above problems. The multifunctional vehicle lamp of the present invention integrates at least two of the red light taillight, yellow light turn signal, brake light and reversing light of OLED materials in the vertical direction of a substrate, and the light-emitting areas of at least two functional lights are different. Considering the uniformity of light color used during daytime and nighttime, the present invention cleverly sets a multi-layer structure and uses functional lights of the same color but different patterns to achieve multi-functional vehicle lamp effects, and can ensure that the light color remains unchanged at night and during the day. This multifunctional vehicle lamp greatly reduces the volume and weight of the vehicle lamp, providing the possibility of reducing fuel consumption, increasing trunk space, and expanding a wider design space.

[0009] According to one embodiment of the present invention, a multifunctional vehicle light module is disclosed, comprising:

[0010] A substrate, a packaging layer, and a drive system;

[0011] A first electrode, a second electrode, a third electrode, and a fourth electrode are sequentially arranged between the substrate and the packaging layer;

[0012] At least three electrodes among the first electrode, the second electrode, the third electrode and the fourth electrode have different patterns;

[0013] A first OLED light-emitting unit is arranged between the first electrode and the second electrode, a second OLED light-emitting unit is arranged between the second electrode and the third electrode, and a third OLED light-emitting unit is arranged between the third electrode and the fourth electrode;

[0014] The first OLED light emitting unit emits light of a first peak wavelength, the second OLED light emitting unit emits light of a second peak wavelength, and the third OLED light emitting unit emits light of a third peak wavelength, and at least two of the first peak wavelength, the second peak wavelength, and the third peak wavelength are different; at least one of the first peak wavelength, the second peak wavelength, and the third peak wavelength is 610 nm or more, and at least one of the first peak wavelength, the second peak wavelength, and the third peak wavelength is between 510 nm and 610 nm;

[0015] At least two of the first OLED light-emitting unit, the second OLED light-emitting unit and the third OLED light-emitting unit have different light-emitting areas;

[0016] The first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit are independently driven.

[0017] According to one embodiment of the present invention, a multifunctional vehicle light module is disclosed, comprising a plurality of multifunctional vehicle light modules as described above, which are arranged transversely to form a module;

[0018] According to one embodiment of the present invention, at least two of the multifunctional vehicle light modules have different light emitting areas;

[0019] According to one embodiment of the present invention, at least two of the multifunctional vehicle light modules adopt a successive driving mode.

[0020] According to one embodiment of the present invention, a multifunctional vehicle lamp is disclosed, which integrates vehicle lamps of different patterns and functions on a substrate, including but not limited to tail lamps emitting deep red light, turn signals emitting yellow light or amber light, brake lights emitting bright red light, and reverse lights emitting white light, and any combination thereof. All of the above vehicle lamps are prepared using an OLED light-emitting panel, wherein if the device of the OLED light-emitting panel is bottom-emitting, the first peak wavelength is less than or equal to the second peak wavelength, and the second peak wavelength is less than or equal to the third peak wavelength; if the device of the OLED light-emitting panel is top-emitting, the first peak wavelength is greater than or equal to the second peak wavelength, and the second peak wavelength is greater than or equal to the third peak wavelength; wherein at least two of the first peak wavelength, the second peak wavelength, and the third peak wavelength are different.

[0021] According to one embodiment of the present invention, the method for preparing the multifunctional vehicle lamp comprises the following steps:

[0022] On a substrate, a first electrode is first set and patterned, then a first OLED light-emitting unit is evaporated to emit light of a first peak wavelength, a second electrode is set and patterned, then a second OLED light-emitting unit is evaporated to emit light of a second peak wavelength, then a third electrode is set and patterned, then a third OLED light-emitting unit is evaporated to emit light of a third peak wavelength, and finally a fourth electrode is set.

[0023] Of course, on this basis, a fourth OLED light-emitting unit can be added to emit light of a fourth peak wavelength. Each OLED light-emitting unit can use a single-layer device or a stacked-layer device.

[0024] The multifunctional headlights of the present invention all use OLED light-emitting units. To realize the functions of headlights, multiple light-emitting units emitting light of different peak wavelengths are integrated in the vertical direction of a substrate. According to the running needs of the vehicle, the corresponding light-emitting units are selected to emit light to obtain the required headlights. Headlights using OLED light-emitting units can achieve uniform light colors during the day and at night.

[0025] Based on the thin and light characteristics of the OLED light-emitting unit, the substrate used in the present invention is preferably a flexible substrate, such as an ultra-thin flexible glass with a thickness of less than 0.1 mm, and the device packaging is preferably a thin film packaging. The total thickness of the OLED module is obtained below 2 mm. Under the same light-emitting area, the overall volume and weight are greatly reduced compared with the existing LED car light module, further reducing the weight of the vehicle and saving more space.

[0026] In the multifunctional vehicle lamp of the present invention, the electrodes can be patterned, and the pattern of each electrode can be different, that is, the patterns of the first electrode, the second electrode, the third electrode, and the fourth electrode are different, and can all be driven independently; by matching the light-emitting unit, vehicle lamps with different functions and different patterns can be obtained, which provides a direction for the design of personalized vehicle lamps.

[0027] In the multifunctional vehicle lamp of the present invention, the substrate can be selected in different shapes (or patterns), and with different electrode shapes (or patterns), more personalized multifunctional vehicle lamps can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1a-1d It is a schematic diagram of the structure of a single-layer OLED device.

[0029] Figure 2 It is a schematic diagram of the structure of a stacked OLED device.

[0030] Figure 3a-3d It is a cross-sectional schematic diagram of an OLED light-emitting module in a multi-function vehicle lamp.

[0031] Figures 4a-4d It is a cross-sectional schematic diagram of an OLED light-emitting module with an inverted structure in a multi-function vehicle lamp.

[0032] Figure 5a This is a top view of the OLED light-emitting module of a multifunctional car light. Figure 5b It is a schematic diagram of a module in which the light emitting module 500 is used in combination.

[0033] Figure 6a , 6b This is a top view and cross-sectional view of the OLED module of the multi-function headlight. Figure 6c It is a schematic diagram of a module composed of three light-emitting modules represented by top views 600 .

[0034] Figure 7a , 7b This is a top view of the OLED light-emitting module of two multifunctional headlights. Figure 7c It is a schematic diagram of a module composed of light emitting modules 700 and 710. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0036] A typical single-layer OLED device 100 is shown in FIG. Figure 1a As shown. The OLED device 100 includes an anode layer 101, a hole injection layer (HIL) 102, a hole transport layer (HTL) 103, an electron blocking layer (EBL) 104, an emitting layer (EML) 105, a hole blocking layer (HBL) 106, an electron transport layer (ETL) 107, an electron injection layer (EIL) 108, a cathode layer 109, and a capping layer (CPL) 110. In a bottom emission device, the anode layer 101 is a transparent or semi-transparent material, including but not limited to ITO, IZO, MoOx (molybdenum oxide), etc., and its transparency is generally greater than 50%; preferably, the transparency is greater than 70%; the cathode layer 109 is a material with high reflectivity, including but not limited to Al, Ag, etc., and the reflectivity is greater than 70%; preferably, the reflectivity is greater than 90%. In the top emission device, the anode layer 101 is a material or a combination of materials with high reflectivity, including but not limited to Ag, Ti, Cr, Pt, Ni, TiN, and a combination of the above materials with ITO and / or MoOx (molybdenum oxide), and the reflectivity is usually greater than 50%; preferably, the reflectivity is greater than 80%; more preferably, the reflectivity is greater than 90%. The cathode layer 109 should be a semi-transparent or transparent conductive material, including but not limited to MgAg alloy, MoOx, Yb, Ca, ITO, IZO or a combination thereof, and its transparency is generally greater than 30%; preferably, the transparency is greater than 50%. The hole injection layer 102 can be a single material layer, such as the commonly used HATCN; the hole injection layer 102 can also be a hole transport material doped with a certain proportion of p-type conductive doping material, usually the doping ratio is not higher than 5%, and the commonly used is between 1% and 3%. The light-emitting layer 105 usually also includes at least one host material and at least one light-emitting material, while the electron blocking layer 104 and the hole blocking layer 106 are optional layers, and the capping layer 110 is not required in the bottom emission device. The electron transport layer 107 may be a single layer of Yb, LiQ or LiF, or may be formed by co-evaporation of two or more materials.

[0037] Figure 1bSchematic diagram of the structure of a multicolor OLED device 130. When other layers remain unchanged, the light-emitting layer may include a light-emitting layer 1051 and a light-emitting layer 1052, wherein the peak wavelength of the light-emitting layer 1051 may be between 600-750nm (red light), and the peak wavelength of the light-emitting layer 1052 may be between 550-600nm (yellow or orange light). Note that the order of the two light-emitting layers may also be reversed, that is, the light-emitting layer 1051 emits yellow or orange light, and the light-emitting layer 1052 emits red light. An OLED device with this structure can emit two colors of light at the same time.

[0038] Figure 1c 1 is a schematic diagram of the structure of a color-variable OLED device 120, which has a light-emitting layer 1053, a light-emitting layer 1055 and an adjustment layer 1054. The adjustment layer 1054 can regulate the movement of electrons and holes at different current densities, thereby achieving color regulation. For example, the peak wavelength of the light-emitting layer 1053 can be between 600-750nm (red light), and the peak wavelength of the light-emitting layer 1055 can be between 550-600nm (yellow or orange light). At low current density, the exciton recombination area is mainly close to the cathode side, that is, in the light-emitting layer 1053, and the OLED device 120 can emit red light; when the injection is gradually increased and the voltage and current density are increased, the exciton recombination area moves to the anode side and finally enters the yellow or orange light-emitting layer 1055, and the OLED device 120 emits yellow or orange light. Of course, the light-emitting layer 1053 can also emit yellow or orange light, and the light-emitting layer 1055 can emit red light, and vice versa.

[0039] The structure of the color-variable OLED device and the use of the adjustment layer may be specifically referred to the previous patent applications CN111081891A and CN111081892A of the present inventor. A down-conversion layer 111 may also be provided on the capping layer 110 of the OLED device 140, such as Figure 1d As shown. The down-conversion layer 111 includes a photoluminescent material, whose absorption spectrum overlaps with the emission spectrum of the light-emitting layer 105. For example, the light-emitting layer 105 emits red light, and the down-conversion layer 111 can absorb the red light and emit near-infrared or infrared light. The photoluminescent material included in the down-conversion layer 111 includes, but is not limited to, quantum dot materials, perovskite materials, phosphor materials, organic light-emitting materials, etc. If the OLED device 140 is a bottom-emitting device, the down-conversion layer 111 can be disposed below the anode 101, and is not drawn in the figure.

[0040] A typical schematic diagram of the structure of a stacked OLED device 200 is shown in FIG. Figure 2As shown, it comprises an anode layer 201, a first OLED light-emitting unit 202, a charge generation layer (CGL) 203, a second OLED light-emitting unit 204, and a cathode layer 205. The first OLED light-emitting unit 202 and the second OLED light-emitting unit 204 may further comprise a series of organic layers from the hole injection layer 102 to the electron injection layer 108 in the single-layer light-emitting device 100, and the light-emitting layers of the first OLED light-emitting unit 202 and the second OLED light-emitting unit 204 may be the same or different. The first OLED light-emitting unit 202 and the second OLED light-emitting unit 204 may emit light of the same color, for example, both emit red light with a peak wavelength between 600-750nm; the first OLED light-emitting unit 202 and the second OLED light-emitting unit 204 may also emit light of different colors, for example, the first OLED light-emitting unit 202 emits red light, and the second OLED light-emitting unit 204 emits yellow light or orange light with a peak wavelength between 550-600nm. In this case, the device 200 can emit red light and yellow light (or orange light) at the same time. The charge generation layer 203 is generally composed of an n-type material and a p-type material, and a buffer layer may be added, as described in patent application CN112687811A. If the stacked device is a top emission device, a capping layer (not shown) may be added on the cathode layer 205. Figure 2 The device shown is a two-unit stacked device, and a third OLED light-emitting unit and a second charge generation layer can be added to form a three-unit stacked device. The preparation of single-layer and stacked OLED devices is well known in the industry and will not be described in detail here.

[0041] As used herein, "top" means farthest from the substrate, while "bottom" means closest to the substrate. In the case where a first layer is described as being "disposed on" a second layer, the first layer is disposed farther from the substrate. Conversely, in the case where a first layer is described as being "disposed under" a second layer, the first layer is disposed closer to the substrate. Unless it is specified that the first layer is "in contact with" the second layer, other layers may exist between the first and second layers. For example, the cathode may be described as being "disposed on" the anode even if various organic layers are present between the cathode and the anode.

[0042] As used herein, the term "OLED device" includes an anode (layer), a cathode (layer), and one or more organic layers disposed between the anode (layer) and the cathode (layer). An "OLED device" may be a bottom-emitting device (bottom-emitting device), which emits light from the anode side, or a top-emitting device (top-emitting device), which emits light from the cathode side, or a transparent device, which emits light from both the anode and the cathode. In this document, the anode (layer) and the cathode (layer) of the same "OLED device" are not in the same plane.

[0043] As used herein, the term "OLED light-emitting unit" is disposed between two electrodes and generally comprises a series of organic materials, which at least comprise hole transport materials, electron transport materials, light-emitting materials in the light-emitting layer, and host materials. An "OLED light-emitting unit" may comprise a "single-layer structure" or a stacked-layer structure.

[0044] As used herein, the term "OLED light-emitting panel" refers to a complete light-emitting panel including a substrate, at least one light-emitting unit, and an encapsulation layer, and may further include a "light extraction layer" and / or a supporting film, a protective film.

[0045] As used herein, the term "OLED light emitting module" includes at least one OLED light emitting panel and its driving system.

[0046] As used herein, the term "OLED light-emitting module" includes a plurality of OLED light-emitting panels and a driving system, wherein the driving system can independently control the plurality of panels simultaneously.

[0047] As used herein, the term "single-layer structure" refers to a device having a light-emitting layer (or multiple continuous light-emitting layers) and a single set of matching hole and electron transport layers between a pair of anodes and cathodes. Such a device having a single light-emitting layer (or multiple continuous light-emitting layers) and its matching transport layers is a "single-layer structure".

[0048] As used herein, the term "stacked structure" refers to a device structure having multiple light-emitting layers between a pair of anodes and cathodes, and each light-emitting layer has its own independent hole transport layer and electron transport layer. Each light-emitting layer and its matching hole transport layer and electron transport layer constitute a light-emitting unit. These light-emitting units are connected by a charge generation layer. A device with such multiple light-emitting units is a "stacked structure."

[0049] As used herein, the term "upright structure" refers to an OLED light-emitting unit in which the hole transport layer is closer to the substrate than the electron transport layer, and the anode is closer to the substrate than the cathode. Conversely, the term "inverted structure" refers to an OLED light-emitting unit in which the electron transport layer is closer to the substrate than the hole transport layer, and the cathode is closer to the substrate than the anode.

[0050] As used herein, the term "luminescent region" refers to the portion of the planar area where the anode, organic layer and cathode overlap, excluding the light extraction effect. The term "discontinuous luminescent region" refers to an area where the area formed by the overlap of the same pair of electrodes and luminescent units has an independent non-luminescent region, making the entire luminescent region discontinuous.

[0051] As used herein, the term "luminescent pattern" refers to the pattern of the portion of the plane area where the anode, organic layer and cathode overlap. If the "luminescent pattern" is formed by multiple different modules, it is the portion formed by the combination of the luminescent areas of each module.

[0052] As used herein, the term "light-emitting surface" refers to the side from which the light source emits light. For example, if it is a bottom-emitting device, the "light-emitting surface" of the OLED light-emitting panel includes the side of the substrate away from the anode. If it is a top-emitting device, the "light-emitting surface" of the OLED light-emitting panel includes the side of the encapsulation layer away from the cathode.

[0053] As used herein, the term "encapsulation layer" may be a thin film encapsulation with a thickness of less than 100 micrometers, which includes placing one or more thin films directly on the device, or may also be a cover glass adhered to a substrate.

[0054] As used herein, the term "flexible printed circuit" (FPC) refers to any flexible substrate coated with any one or a combination of the following, including but not limited to: conductive lines, resistors, capacitors, inductors, transistors, micro-electromechanical systems (MEMS), etc. The flexible substrate of the flexible printed circuit can be plastic, thin glass, thin metal foil coated with an insulating layer, fabric, leather, paper, etc. A flexible printed circuit board is generally less than 1 mm thick, and more preferably less than 0.7 mm thick.

[0055] As used herein, the term "light extraction layer" may refer to a light diffusion film, or other microstructures with light extraction effect, or a thin film coating with light outcoupling effect. The light extraction layer may be disposed on the surface of the substrate of the OLED, or may be disposed at other suitable locations, such as between the substrate and the anode, or between the organic layer and the cathode, between the cathode and the encapsulation layer, on the surface of the encapsulation layer, and so on.

[0056] As used herein, the term "independent drive" means that the operating points of two or more light-emitting panels or OLED light-emitting units are controlled separately. Although these light-emitting panels or OLED light-emitting units can be connected to the same controller or power line, there can be circuits to divide the drive route and power each panel or OLED light-emitting unit without affecting each other.

[0057] As used herein, the term "gradient power supply" means that when there are three or more electrodes and power is supplied to the three or more electrodes simultaneously, the electric potentials provided on the three or more electrodes decrease or increase in sequence according to the distance from the substrate. For example, the three electrodes are 6V, 3V and 0V in sequence from the substrate upwards.

[0058] As used in this article, the term "degenerate power supply" means that when there are three or more electrodes and power is supplied to the three or more electrodes simultaneously, at least the middle electrode among the three or more electrodes is a common electrode, that is, it is at the lowest or highest potential, and the potentials of the electrodes immediately above and below it are higher or lower than that of the middle electrode, for example, the three electrodes are 3V, 0V and 3V respectively from the substrate upwards.

[0059] As used herein, the term "successive driving" refers to the use of sequential lighting of OLED light-emitting units of different modules in time to form a dynamic effect in space. "Successive driving" can light up a module and then light up the next module after turning it off, or it can light up a module and then light up the next module at the next time node without turning off the module.

[0060] As used herein, the term "lateral" refers to a direction perpendicular to the growth direction of the film layer of the OLED device and parallel to the plane where the substrate is located.

[0061] According to one embodiment of the present invention, a multifunctional vehicle light module is disclosed, comprising:

[0062] A substrate, a packaging layer, and a drive system;

[0063] A first electrode, a second electrode, a third electrode, and a fourth electrode are sequentially arranged between the substrate and the packaging layer;

[0064] At least three electrodes among the first electrode, the second electrode, the third electrode and the fourth electrode have different patterns;

[0065] A first OLED light-emitting unit is arranged between the first electrode and the second electrode, a second OLED light-emitting unit is arranged between the second electrode and the third electrode, and a third OLED light-emitting unit is arranged between the third electrode and the fourth electrode;

[0066] The first OLED light emitting unit emits light of a first peak wavelength, the second OLED light emitting unit emits light of a second peak wavelength, and the third OLED light emitting unit emits light of a third peak wavelength, and at least two of the first peak wavelength, the second peak wavelength, and the third peak wavelength are different; at least one of the first peak wavelength, the second peak wavelength, and the third peak wavelength is 610 nm or more, and at least one of the first peak wavelength, the second peak wavelength, and the third peak wavelength is between 510 nm and 610 nm;

[0067] At least two of the first OLED light-emitting unit, the second OLED light-emitting unit and the third OLED light-emitting unit have different light-emitting areas;

[0068] The first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit are independently driven.

[0069] The different light-emitting areas of at least two light-emitting units described in the present invention refer to different shapes (or patterns) or positions of the light-emitting areas. At the same time, the shapes (or patterns) of at least three of the first, second, third and fourth electrodes are different. The single light-emitting area and the corresponding electrodes work together to ensure that different light-emitting patterns are obtained. One or more light-emitting pattern combinations can obtain car lights with different functions and different patterns, providing design space for more personalized car lights.

[0070] In the multifunctional vehicle lamp of the present invention, the substrate can be selected in different shapes (or patterns), and with different electrode shapes (or patterns), more personalized multifunctional vehicle lamps can be provided.

[0071] According to an embodiment of the present invention, patterns of the four electrodes among the first electrode, the second electrode, the third electrode and the fourth electrode are all different.

[0072] According to an embodiment of the present invention, light emitting areas of the first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit are different.

[0073] According to an embodiment of the present invention, the thickness of the substrate is less than or equal to 0.5 mm; preferably, the thickness of the substrate is less than or equal to 0.2 mm; more preferably, the thickness of the substrate is less than or equal to 0.1 mm.

[0074] According to an embodiment of the present invention, the substrate is hard and is selected from ordinary glass.

[0075] According to one embodiment of the present invention, the substrate is flexible, and the substrate is selected from any one or more of ultra-thin flexible glass, PET, PEN, PI, and metal foil.

[0076] According to an embodiment of the present invention, the encapsulation layer is a flexible encapsulation layer.

[0077] According to one embodiment of the present invention, the first electrode is transparent or translucent, the fourth electrode is a metal film layer with reflective properties, the first peak wavelength is less than or equal to the second peak wavelength, and the second peak wavelength is less than or equal to the third peak wavelength.

[0078] According to an embodiment of the present invention, the first peak wavelength is between 510-540 nm, the second peak wavelength is between 541-610 nm, and the third peak wavelength is 610 nm or above. Preferably, the third peak wavelength is between 610-780 nm.

[0079] According to one embodiment of the present invention, the first peak wavelength is between 510-610 nm, and the second peak wavelength is equal to the third peak wavelength, which is 610 nm and above, preferably 610-780 nm.

[0080] According to one embodiment of the present invention, the fourth electrode is transparent or translucent, the first electrode is a metal film layer with reflective properties, the first peak wavelength is greater than or equal to the second peak wavelength, and the second peak wavelength is greater than or equal to the third peak wavelength.

[0081] According to an embodiment of the present invention, the first peak wavelength is 610 nm or above, the second peak wavelength is 541-610 nm, and the third peak wavelength is between 510-540 nm. Preferably, the first peak wavelength is between 610-780 nm.

[0082] According to one embodiment of the present invention, the first peak wavelength is equal to the second peak wavelength, which is 610 nm and above, and the third peak wavelength is between 510-610 nm.

[0083] Preferably, the first peak wavelength is equal to the second peak wavelength, which is between 610-780 nm.

[0084] According to one embodiment of the present invention, the second electrode and the third electrode are transparent or translucent, and their materials include but are not limited to Mg (magnesium), Ag (silver), Yb (ytterbium), Ca (calcium), MoOx, hole transport materials, P-type conductive doping materials, electron transport materials, or a combination thereof.

[0085] According to an embodiment of the present invention, the multifunctional vehicle light module further comprises a fifth electrode, and a fourth OLED light emitting unit is disposed between the fourth electrode and the fifth electrode, and the fourth OLED light emitting unit emits a fourth peak wavelength.

[0086] According to an embodiment of the present invention, at least one of the first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit is an inverted structure.

[0087] According to an embodiment of the present invention, the first OLED light emitting unit is an inverted structure, and the second OLED light emitting unit and the third OLED light emitting unit are upright structures.

[0088] According to an embodiment of the present invention, the second OLED light emitting unit is an inverted structure, and the first OLED light emitting unit and the third OLED light emitting unit are upright structures.

[0089] According to an embodiment of the present invention, the third OLED light emitting unit is an inverted structure, and the first OLED light emitting unit and the second OLED light emitting unit are upright structures.

[0090] According to an embodiment of the present invention, the second OLED light emitting unit and the third OLED light emitting unit are inverted structures, and the first OLED light emitting unit is an upright structure.

[0091] According to an embodiment of the present invention, the first OLED light emitting unit and the third OLED light emitting unit are inverted structures, and the second OLED light emitting unit is a normal structure.

[0092] According to an embodiment of the present invention, the first OLED light emitting unit and the second OLED light emitting unit are inverted structures, and the third OLED light emitting unit is a normal structure.

[0093] According to an embodiment of the present invention, the first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit are inverted structures.

[0094] According to an embodiment of the present invention, the driving system may select any two of the first electrode, the second electrode, the third electrode, and the fourth electrode as anode and cathode, and supply power to them.

[0095] According to an embodiment of the present invention, the driving system may select any three or more of the first electrode, the second electrode, the third electrode, and the fourth electrode to provide gradient power supply.

[0096] According to an embodiment of the present invention, the driving system may select any three or more of the first electrode, the second electrode, the third electrode, and the fourth electrode to provide degenerate power supply.

[0097] According to an embodiment of the present invention, a light emitting area of ​​at least one of the first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit is discontinuous.

[0098] According to an embodiment of the present invention, light emitting areas of two of the first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit are discontinuous.

[0099] According to an embodiment of the present invention, light-emitting areas of three light-emitting units among the first OLED light-emitting unit, the second OLED light-emitting unit and the third OLED light-emitting unit are discontinuous.

[0100] According to an embodiment of the present invention, at least one of the first electrode, the second electrode, the third electrode and the fourth electrode is discontinuous.

[0101] According to an embodiment of the present invention, two electrodes among the first electrode, the second electrode, the third electrode and the fourth electrode are discontinuous.

[0102] According to an embodiment of the present invention, three electrodes among the first electrode, the second electrode, the third electrode and the fourth electrode are discontinuous.

[0103] According to an embodiment of the present invention, four electrodes among the first electrode, the second electrode, the third electrode and the fourth electrode are discontinuous.

[0104] According to an embodiment of the present invention, the multifunctional vehicle light module may further include a fifth electrode, and a fourth OLED light-emitting unit is disposed between the fourth electrode and the fifth electrode, and the fourth OLED light-emitting unit emits a fourth peak wavelength.

[0105] According to one embodiment of the present invention, the first electrode is transparent or translucent, the fifth electrode is a metal film layer with reflective properties, the first peak wavelength is 480nm and below, the second peak wavelength is between 510-610nm, and the third peak wavelength is equal to the fourth peak wavelength, which is 610nm and above.

[0106] Preferably, the third peak wavelength is equal to the fourth peak wavelength between 610-780 nm.

[0107] According to one embodiment of the present invention, a multifunctional vehicle light module is also disclosed, comprising a plurality of the multifunctional vehicle light modules.

[0108] According to one embodiment of the present invention, the multifunctional vehicle light module includes the multifunctional vehicle light modules arranged laterally.

[0109] According to one embodiment of the present invention, at least two of the multifunctional vehicle light modules in the multifunctional vehicle light module set have different light emitting areas.

[0110] According to one embodiment of the present invention, at least two of the multifunctional vehicle light modules in the multifunctional vehicle light module set adopt a successive driving mode.

[0111] According to one embodiment of the present invention, a multifunctional vehicle light is also disclosed. The multifunctional vehicle light comprises a plurality of the multifunctional vehicle light modules or the multifunctional vehicle light module assembly.

[0112] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited thereto.

[0113] Figure 3aThe cross-sectional schematic diagram 300 of an OLED light-emitting module in a multifunctional vehicle lamp is shown, which includes a substrate 301, a first electrode 3021, a second electrode 3022, a third electrode 3023, a fourth electrode 3024, a first OLED light-emitting unit 3031, a second OLED light-emitting unit 3032, a third OLED light-emitting unit 3033, a first driver 3041 formed by connecting the first electrode 3021 and the second electrode 3022, a second driver 3042 formed by connecting the second electrode 3022 and the third electrode 3023, a third driver 3043 formed by connecting the third electrode 3023 and the fourth electrode 3024, a fourth driver 3044 formed by connecting the first electrode 3021 and the third electrode 3023, a fifth driver 3045 formed by connecting the second electrode 3022 and the fourth electrode 3024, and a sixth driver 3046 formed by connecting the first electrode 3021 and the fourth electrode 3024, and an encapsulation layer 305. The light-emitting module is bottom-emitting, that is, the emission direction of the light is toward one side of the substrate, as shown by the arrow in the figure. The substrate 301 can be hard or flexible, preferably flexible. The substrate can be ordinary glass, ultra-thin flexible glass, PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PI (polyimide), metal foil, etc. In particular, the substrate 301 can be a material (such as PI material) that is previously coated on the supporting base plate in the form of a solution, and is used for device preparation after curing and flattening. After the device is prepared, it is peeled off from the supporting base plate using a laser and transferred to other flexible substrates as needed. The thickness of the substrate is less than or equal to 0.5 mm, preferably less than or equal to 0.2 mm, and more preferably less than or equal to 0.1 mm. The encapsulation layer 305 can be a hard glass covered on the device by an adhesive, and the adhesive can be a material cured by UV. The encapsulation layer 305 is preferably a thin film encapsulation layer, and the thickness is usually above 10 μm, such as a single inorganic layer, or a multilayer structure of alternating organic and inorganic thin films, which can be formed by plasma enhanced chemical vapor deposition (PECVD), atomic layer deposition (ALD), printing or spin coating.

[0114] exist Figure 3aIn the OLED light-emitting module 300 of the multifunctional vehicle lamp shown, the first electrode 3021 is an anode, which is transparent or translucent, preferably made of materials such as ITO and IZO. The second electrode 3022 and the third electrode 3023 are both transparent or translucent, and their materials include but are not limited to Mg, Ag, Yb, Ca, MoOx, hole transport materials, P-type conductive doping materials, electron transport materials, or combinations thereof. When a metal material (such as Mg, Ag, Yb, Ca and combinations thereof) is used, its thickness should be less than or equal to 50 nm, preferably less than or equal to 20 nm, and more preferably less than or equal to 10 nm. Another way to prepare the second electrode 3022 and the third electrode 3023 is similar to preparing the charge generation layer, that is, using a layer of electron-transporting material (such as metal or organic electron-transporting material) combined with a layer of hole-transporting material (such as hole transport material, or doping P-type conductive doping material in the hole transport material). The transmittance of the first to third electrodes is above 90%, preferably above 95%, and more preferably above 97%. The fourth electrode 3024 is a metal film layer with reflective properties, including but not limited to Al, Ag, or a combination thereof. At least two of the four electrodes have different patterns, preferably at least three are different, and more preferably all of the patterns are different. The electrode patterns will be described in detail below.

[0115] exist Figure 3a In the OLED light-emitting module 300 of the multifunctional vehicle lamp shown in FIG. 1 , the first OLED light-emitting unit 3031 , the second OLED light-emitting unit 3032 and the third OLED light-emitting unit 3033 are all devices of a positive structure, that is, their hole transport layers are closer to the substrate 301 than the electron transport layers. The specific structures of the three light-emitting units are shown in FIG. 1 and FIG. Figure 2. It should be noted that in a single light-emitting unit, a single-layer structure or a stacked structure can be used. For example, by stacking two red light-emitting layers and a charge generation layer in a light-emitting unit, the luminance of the red light can be increased and the life of the device can be extended. The module adopts a bottom-emitting device structure. Therefore, in order to avoid the absorption of high-energy light by low-energy light, the emission wavelengths of different light-emitting units need to increase in sequence from near to far according to the distance from the substrate, that is, the peak wavelength emitted by the first OLED light-emitting unit 3031 should be less than or equal to the peak wavelength emitted by the second OLED light-emitting unit 3032, and the peak wavelength emitted by the second OLED light-emitting unit 3032 should be less than or equal to the peak wavelength emitted by the third OLED light-emitting unit 3033, wherein at least two peak wavelengths are unequal. For example, in this embodiment, the first OLED light-emitting unit 3031 emits green light with a peak wavelength between 510-540nm, the second OLED light-emitting unit 3032 emits yellow light or orange light with a peak wavelength between 541-610nm, and the third OLED light-emitting unit 3033 emits red light or deep red light with a peak wavelength of 610nm and above. The three light-emitting units each form a first, second and third light-emitting pattern, wherein at least two of the light-emitting patterns are different. Preferably, the light-emitting patterns of the first and second OLED light-emitting units are the same and different from the light-emitting pattern of the third OLED light-emitting unit. Generally, the area of ​​the position light is larger than that of the turn signal light and the brake light, so the third OLED light-emitting unit 3033 for emitting red light is usually the one with the largest area or the largest pattern size, while the light-emitting patterns of the second OLED light-emitting unit and the first OLED light-emitting unit are used as turn signals, and the two light-emitting patterns are consistent and different from the light-emitting pattern of the third OLED light-emitting unit 3033.

[0116] exist Figure 3a The OLED light emitting module 300 of the multifunctional vehicle lamp shown can be driven in the following ways:

[0117] 1. When the yellow turn signal lamp needs to be turned on during the day, the second driver 3042 formed by connecting the second electrode 3022 and the third electrode 3023 supplies power to the second OLED light-emitting unit 3032, and makes it emit yellow light or orange light with a peak wavelength between 540-610nm toward the substrate side. The obtained light-emitting pattern corresponds to the yellow turn signal lamp used during the day;

[0118] 2. When the position lamp (i.e., tail lamp) needs to be turned on during night driving, the third electrode 3023 and the fourth electrode 3024 are connected to form a third driver 3043, power is supplied to the third OLED light-emitting unit 3033, and the third OLED light-emitting unit 3033 emits red light with a peak wavelength of 610 nm or more toward one side of the substrate, and the obtained light-emitting pattern corresponds to the position lamp (i.e., tail lamp) required for night driving;

[0119] 3. When the position lamp and the turn signal lamp need to be lit at the same time when driving at night, the first electrode 3021 and the second electrode 3022 are connected to form a first driver 3041, and the first OLED light-emitting unit 3031 is powered to emit green light with a peak wavelength between 510-540nm toward one side of the substrate. At the same time, the third electrode 3023 and the fourth electrode 3024 are connected to form a third driver 3043, and the third OLED light-emitting unit 3033 is powered to emit red light toward the same side. In this way, the red and green light colors in the light-emitting pattern of the second OLED light-emitting unit overlap to form yellow light. At the same time, the third OLED light-emitting unit still emits a red position lamp signal in the area except the pattern of the second OLED light-emitting unit. The obtained light-emitting pattern corresponds to the position lamp and turn signal lamp required for night driving;

[0120] 4. The fourth driver 3044 formed by connecting the first electrode 3021 and the third electrode 3023 can light up the first OLED light-emitting unit and the second OLED light-emitting unit at the same time, and make them emit yellow-green light toward the substrate side. Since the light-emitting patterns of the first and second OLED light-emitting units are consistent, the resulting light-emitting pattern can be used as an atmosphere light during the day;

[0121] 5. The fifth driver 3045 formed by connecting the second electrode 3022 and the fourth electrode 3024 can light up the second and third OLED light-emitting units at the same time, and make them emit orange light in the light-emitting pattern of the second OLED light-emitting unit, and at the same time, the third OLED light-emitting unit emits red light in the area outside the light-emitting pattern of the second OLED light-emitting unit. The resulting light-emitting pattern corresponds to a red position light and an orange ambient light or a turn signal light used simultaneously at night;

[0122] 6. The sixth driver 3046 formed by connecting the first electrode 3021 and the fourth electrode 3024 can light up the first, second and third OLED light-emitting units at the same time, emitting broad-spectrum green light (and yellow light) in the first (and second) light-emitting pattern, and emitting red position lights in other areas of the third light-emitting pattern. The resulting light-emitting pattern corresponds to a red position light, a yellow ambient light or a turn signal light that can be used simultaneously at night. It should be noted that the specific color and brightness can be adjusted by the driver.

[0123] For example, only lighting up the second OLED light-emitting unit 3032 can emit yellow light, but when used at night, the third OLED light-emitting unit 3033 is emitting red light. If you want to use the turn signal, you can no longer directly light up the second OLED light-emitting unit 3032, but need to light up the first OLED light-emitting unit 3031 to emit green light, so that it can be combined with the red light of the third light-emitting unit 3033 to emit yellow light. In order to make the yellow light in the day and the yellow light at night have the same color, the color and brightness of the first OLED light-emitting unit 3031 can be adjusted. The driving schemes in 3-6 can also be implemented by driving 3041 and 3042 at the same time, driving 3042 and 3043 at the same time, and driving 3041-3043 at the same time. In this case, gradient power supply is required. That is, when 3041 and 3042 are driven simultaneously, the potential of the first electrode 3021 is higher than that of the second electrode 3022, and the potential of the second electrode 3022 is higher than that of the third electrode 3023; if 3043 is driven again, the potential of the third electrode 3023 is still higher than that of the fourth electrode 3024. The advantage of this gradient drive over drive schemes 3-6 is that each light-emitting unit is an independent circuit, so its operating point can be independently controlled, which is convenient for adjusting the light color and brightness.

[0124] Figure 3b A cross-sectional schematic diagram 310 of an OLED light-emitting module in a multifunctional vehicle taillight is shown, which includes a substrate 311, a first electrode 3121, a second electrode 3122, a third electrode 3123, a fourth electrode 3124, a first OLED light-emitting unit 3131, a second OLED light-emitting unit 3132, a third OLED light-emitting unit 3133, a first driver 3141 formed by connecting the first electrode 3121 and the second electrode 3122, a second driver 3142 formed by connecting the second electrode 3122 and the third electrode 3123, a third driver 3143 formed by connecting the third electrode 3123 and the fourth electrode 3124, a fourth driver 3144 formed by connecting the first electrode 3121 and the third electrode 3123, a fifth driver 3145 formed by connecting the second electrode 3122 and the fourth electrode 3124, and a sixth driver 3146 formed by connecting the first electrode 3121 and the fourth electrode 3124, and an encapsulation layer 315. The light-emitting module is also a bottom emission structure, and the light emission direction is shown by the arrow.

[0125] The difference from that shown in schematic diagram 300 is that the second and third OLED light-emitting units of the OLED light-emitting module 310 emit light with the same peak wavelength, both at 610nm and above. Preferably, the device structures of the second and third OLED light-emitting units are the same. However, the light-emitting patterns of these two light-emitting units are different. Usually, the area of ​​position lights is larger than that of turn signals and brake lights. Therefore, the light-emitting pattern of the third OLED light-emitting unit should be larger than that of the first and second OLED light-emitting units, and the light-emitting patterns of the first and second OLED light-emitting units should be consistent. The first OLED light-emitting unit 3131 emits green light with a peak wavelength of 510-540. The specific usage scheme is as follows:

[0126] 1. When a red position light is needed at night, the third driver 3143 formed by connecting the third electrode 3123 and the fourth electrode 3124 lights up the third OLED light-emitting unit to emit red light with a peak wavelength of 610nm and above, and the resulting light-emitting pattern corresponds to the red position light needed to be used at night;

[0127] 2. When the red position light and the yellow turn signal light need to be used at the same time at night, the first driver 3141 formed by connecting the second electrode 3122 and the first electrode 3121 lights up the first OLED light-emitting unit 3131, and the third driver 3143 formed by connecting the third electrode 3123 and the fourth electrode 3124 lights up the third OLED light-emitting unit to emit red light. At this time, the red light and the green light are superimposed to form yellow light, and the pattern of the yellow light is different from the pattern of the red light. The light-emitting pattern obtained corresponds to the red position light and the yellow turn signal light that need to be used at the same time at night;

[0128] 3. When the red position light and the high-brightness brake light need to be used at the same time at night, the second electrode 3122 and the third electrode 3123 are connected to light up the second OLED light-emitting unit to emit red light, and the third electrode 3123 and the fourth electrode 3124 are connected to light up the third OLED light-emitting unit to emit red light. At this time, the red light of the second and third OLED light-emitting units is superimposed, and the superposition will be brighter, achieving the effect of the high-brightness brake light, while the other areas of the light-emitting pattern of the third OLED light-emitting unit are still the brightness of a single red light unit, realizing the function of the position light. The light-emitting pattern obtained thereby corresponds to the red position light and the high-brightness brake light that need to be used at the same time at night;

[0129] 4. Scheme 3 can also realize driving 3145 by directly connecting the second electrode 3122 and the fourth electrode 3124, but as mentioned above, scheme 3 is more convenient for adjusting the light color and brightness separately;

[0130] 5. The first driver 3141 formed by connecting the first electrode 3121 and the second electrode 3122 emits green light, and the second driver 3142 formed by connecting the second electrode 3122 and the third electrode 3123 emits red light. At this time, since the first and second OLED light-emitting units have the same light-emitting pattern, that is, yellow light is emitted in the light-emitting pattern, the obtained light-emitting pattern corresponds to the turn signal required to be used during the day; at this time, a gradient power supply method needs to be used, that is, the potential of the first electrode 3121 is higher than that of the second electrode 3122, and the potential of the second electrode 3122 is higher than that of the third electrode 3123;

[0131] 6. Solution 5 can also realize driving 3144 by directly connecting the first electrode 3121 and the third electrode 3123, but the disadvantage compared with Solution 5 is that the first and second OLED light-emitting units cannot be independently regulated;

[0132] 7. When it is necessary to emit a red position light and a yellow turn signal at the same time at night, this can also be achieved by connecting drivers 3141, 3142 and 3143 at the same time and controlling them independently. At this time, the light color and brightness can be adjusted by adjusting the brightness of driver 3142. Similarly, driver 3146 formed by directly connecting the fourth electrode 3124 and the first electrode 3121 can also achieve this effect, but since all units are connected in series, the brightness of each unit cannot be independently adjusted.

[0133] The OLED light-emitting module in the multifunctional taillight can also use a top emission structure. The cross-sectional schematic diagram 320 of this embodiment is shown in FIG. Figure 3cAs shown, it includes a substrate 321, a first electrode 3221, a second electrode 3222, a third electrode 3223, a fourth electrode 3224, a first OLED light-emitting unit 3231, a second OLED light-emitting unit 3232, a third OLED light-emitting unit 3233, a first driver 3241 formed by connecting the first electrode 3221 and the second electrode 3222, a second driver 3242 formed by connecting the second electrode 3222 and the third electrode 3223, a third driver 3243 formed by connecting the third electrode 3223 and the fourth electrode 3224, a fourth driver 3244 formed by connecting the first electrode 3221 and the third electrode 3223, a fifth driver 3245 formed by connecting the second electrode 3222 and the fourth electrode 3224, and a sixth driver 3246 formed by connecting the first electrode 3221 and the fourth electrode 3224, and an encapsulation layer 325. The light-emitting module is a top emission structure, and the light-emitting direction is shown by the arrow. In this embodiment, in order to avoid secondary absorption, the long-wavelength light-emitting unit should be placed close to the substrate, and the wavelength should be gradually reduced in the direction away from the substrate. For example, the first OLED light-emitting unit 3231 emits red light with a peak wavelength of 610nm or above, the second OLED light-emitting unit 3232 emits yellow light or orange light with a peak wavelength between 541-610nm, and the third OLED light-emitting unit 3233 emits green light with a peak wavelength between 510-540nm. Of course, as mentioned above, the second OLED light-emitting unit can also be red light with a peak wavelength above 610nm.

[0134] On the basis of the above embodiment, more light-emitting units can be stacked, such as Figure 3dAs shown in the cross-sectional schematic diagram 330 of a multifunctional vehicle lamp, it includes a substrate 331, a first electrode 3321, a second electrode 3322, a third electrode 3323, a fourth electrode 3324, a fifth electrode 3325, a first OLED light-emitting unit 3331, a second OLED light-emitting unit 3332, a third OLED light-emitting unit 3333, a fourth OLED light-emitting unit 3334, a first driver 3341 formed by connecting the first electrode 3321 and the second electrode 3322, a second driver 3342 formed by connecting the second electrode 3322 and the third electrode 3323, a third driver 3343 formed by connecting the third electrode 3323 and the fourth electrode 3324, and a fourth driver 3344 formed by connecting the fourth electrode 3324 and the fifth electrode 3325. In addition, multiple unit drivers can be formed by connecting two electrodes in each other, which is not drawn in the figure. This embodiment still adopts a bottom emission structure, and the light emission direction is shown by the arrow in the figure. The first OLED light emitting unit 3331 emits blue light with a peak wavelength of 480nm or less, the second OLED light emitting unit 3332 emits green light with a peak wavelength between 510-540nm, the third OLED light emitting unit 3333 emits red light with a peak wavelength of 610nm or more, and the fourth OLED light emitting unit 3334 emits red light with a peak wavelength of 610nm or more. At this time, since the first OLED light emitting unit 3331 emits blue light, the drivers 3341, 3342 and 3344 can be started to light up the first, second and fourth OLED light emitting units at the same time, that is, to emit a mixture of blue, green and red light, forming white light in the light emitting pattern of the first OLED light emitting unit 3331, which can be used as a reversing light. Note that at this time, the light emitting patterns of the first, second and third OLED light emitting units should remain consistent, but different from the light emitting pattern of the fourth OLED light emitting unit.

[0135] In another multifunctional vehicle lamp, at least one light emitting unit in the OLED light emitting module may also adopt an inverted structure, such as Figure 4aThe cross-sectional schematic diagram 400 shown includes a substrate 401, a first electrode 4021, a second electrode 4022, a third electrode 4023, a fourth electrode 4024, a first OLED light-emitting unit 4031, a second OLED light-emitting unit 4032, a third OLED light-emitting unit 4033, a first driver 4041 formed by connecting the first electrode 4021 and the second electrode 4022, a second driver 4042 formed by connecting the second electrode 4022 and the third electrode 4023, a third driver 4043 formed by connecting the third electrode 4023 and the fourth electrode 4024, and an encapsulation layer 405. The light-emitting module is bottom-emitting, that is, the light is emitted toward one side of the substrate, as shown by the arrow in the figure. In this embodiment, the deposition order of the organic material in the second OLED light-emitting unit 4032 is different from that of the other two light-emitting units, that is, starting from the second electrode 4022, the electron transport layer, the light-emitting layer, and the hole transport layer are deposited in sequence, that is, the electron transport layer (including the electron injection layer) is close to the second electrode 4022, and the hole transport layer (including the hole injection layer) is closer to the third electrode 4023. The second drive 4042 has opposite polarity to the first and third drives. The advantage of this architecture is that when two drives are started, degenerate drive can be achieved. For example, the second electrode 4022 can be used as a common cathode for the first drive 4041 and the second drive 4042, for example, both are 0V, and the first electrode 4021 and the third electrode 4023 can be 3V, so that for the peripheral drive circuit, the highest voltage is 3V, and in the previous gradient drive, if two drives are to be started, the highest voltage needs to be the superposition of two separate drives, for example 6V, so the degenerate drive provides more simplification for the circuit design. Similarly, when the second driver 4042 and the third driver 4043 are to be turned on simultaneously, the third electrode 4023 becomes a degenerate electrode, which is a common anode of the two drivers.

[0136] When there are four light-emitting units in an OLED light-emitting module of a multifunctional vehicle lamp, an inverted structure can also be used. Figure 4b In the cross-sectional schematic diagram 410 shown, the third OLED light-emitting unit 4133 is an inverted structure. The second driver 4142 and the third driver 4143 can use the third electrode 4123 as a common cathode, and the third driver 4143 and the fourth driver 4144 can use the fourth electrode 4124 as a common anode, which can also reduce the maximum voltage of the circuit to a certain extent. At this time, the first electrode 4121 and the third electrode 4123 can be directly connected to form a fifth driver 4145, so that the first and second OLED light-emitting units can be lit at the same time. Similarly, as Figure 4cIn the cross-sectional schematic diagram 420 shown, the second OLED light emitting unit 4232 is an inverted structure, so the second electrode 4222 can be used as a common cathode of the first driver 4241 and the second driver 4242, and the third electrode 4223 can be used as a common anode of the second driver 4242 and the third driver 4243. At this time, the third electrode 4223 and the fifth electrode 4225 can be directly connected to form a fifth driver 4245, so that the third and fourth OLED light emitting units can be lit at the same time. Figure 4d In the cross-sectional schematic diagram of the embodiment 420 shown, the second OLED light-emitting unit 4332 and the third OLED light-emitting unit 4333 are both inverted structures. At this time, the second electrode 4322 can be used as a common cathode of the first driver 4341 and the second driver 4342, and the fourth electrode 4324 can be used as a common anode of the third driver 4343 and the fourth driver 4344, further reducing the maximum voltage that the circuit needs to provide. At this time, the second electrode 4322 and the fourth electrode 4324 can also be directly connected to form a fifth driver 4345, so that the second and third OLED light-emitting units can be lit at the same time.

[0137] As mentioned above, in the OLED light-emitting module of the multifunctional vehicle lamp, the light-emitting patterns of at least two light-emitting units are different, which will be described in detail in the following embodiments.

[0138] Figure 5a A top view 500 of an OLED light emitting module 300 of a multifunctional vehicle light is shown, which includes a first light emitting pattern 501 and a second light emitting pattern 502. The first light emitting pattern 501 corresponds to Figure 3a The light-emitting area formed by the overlap of the third electrode 3023, the third OLED light-emitting unit 3033 and the fourth electrode 3024 emits a third peak wavelength when lit alone, preferably, red light of 610nm and above, and can be used as a vehicle position lamp. The second light-emitting pattern 502 may include a light-emitting area formed by the overlap of the second electrode 3022, the second OLED light-emitting unit 3032 and the third electrode 3023 and light of the second peak wavelength, and a light-emitting area formed by the overlap of the first electrode 3021, the first OLED light-emitting unit 3031 and the second electrode 3022 and light of the first peak wavelength. Although the two luminous areas have the same pattern, they emit different colors of light. As mentioned above, the second peak wavelength can be yellow light with a peak wavelength between 541-610nm, which can be used as a turn signal during the day when it is lit alone; the first peak wavelength can be green light with a peak value between 510-540nm. If you want to use the turn signal at night, when the first luminous pattern 501 of the position light is lit and emits red light, the first OLED light-emitting unit is driven to emit green light. Then, within the range of the second luminous pattern 502, the red and green lights are superimposed to form yellow light, and the turn signal function can be realized. Of course, the same pattern as 500 can also be used. Figure 3b In the combination mode, the second OLED light-emitting unit emits red light with a second peak wavelength of 610nm or more, and the first OLED light-emitting unit emits green light with a first peak wavelength of 510-540nm. In this case, if the turn signal light (i.e., the first light-emitting pattern 501) needs to be turned on during the day, the area composed of the first electrode 3121, the first OLED light-emitting unit 3131, and the second electrode 3122 can be driven to emit green light at the same time, and the area composed of the second electrode 3122, the second OLED light-emitting unit 3132, and the third electrode 3123 can be driven to emit red light at the same time. Since these two light-emitting areas are both the second light-emitting pattern 502, red and green are superimposed in this area to form yellow light, thereby realizing the turn signal function during the day. Similarly, if you want to light up the position light (first light pattern 501) and the turn signal light (second light pattern 502) at the same time at night, you only need to drive the third OLED light unit 3133 to emit red light as the position light, and drive the first OLED light unit 3131 to emit green light. Since the light pattern of the first OLED light unit is the second light pattern 502, a yellow light with red and green superimposed is formed in the second light pattern 502, making the second light pattern 502 the turn signal area. Figure 3b The structure can also realize the function of high-brightness red brake light in the second light-emitting pattern 502, as follows: when the brake light needs to be turned on during the day, it is only necessary to drive the second OLED light-emitting unit 3132 and give it a high current or a high voltage to make it emit a high-brightness red light, and the light-emitting pattern is the second light-emitting pattern 502; when the brake light needs to be turned on at night, it is only necessary to drive the third OLED light-emitting unit 3133 and the second OLED light-emitting unit 3132 to emit red light at the same time, but the second OLED light-emitting unit 3132 does not need to be given a high current or a high voltage, because in the second light-emitting pattern 502, the third OLED light-emitting unit 3133 and the second OLED light-emitting unit 3132 will emit red light at the same time, naturally achieving high brightness. Therefore, when using Figure 3b When the architecture is implemented, the red position light can be realized in the first light emitting pattern 501, and the functions of the yellow turn signal light and / or the high-brightness red brake light can be realized in the second light emitting pattern 502.

[0139] refer to Figure 3d The architecture can also be used Figure 5aThe top view 500 is described. At this time, the fourth electrode 3324, the fourth OLED light-emitting unit 3334 and the fifth electrode 3325 overlap to form a first light-emitting pattern 501, emitting red light with a fourth peak wavelength of 610nm and above, and this area can realize the function of a position light; the first electrode 3321, the first OLED light-emitting unit 3331 and the second electrode 3322 overlap to form a second light-emitting pattern 502, emitting blue light with a first peak wavelength of 480nm and below, the second electrode 3322, the second OLED light-emitting unit 3332 and the third electrode 3323 overlap to form the first light-emitting pattern 501, emitting green light with a second peak wavelength of 510-540nm, and finally, the third electrode 3323, the third OLED light-emitting unit 3333 and the fourth electrode 3324 overlap to form a second light-emitting pattern 502, emitting red light with a third peak wavelength of 610nm and above. Based on Figure 3d The headlight of the structure can realize the position light function in the first light pattern 501, and can realize the turn signal light, brake light and reverse light functions in the second light pattern 502, as follows:

[0140] 1. Only drive the fourth OLED light-emitting unit to realize the red position light in the first light-emitting pattern 501;

[0141] 2. Drive the second OLED light-emitting unit and the third OLED light-emitting unit at the same time to realize yellow light in the first light-emitting pattern 501, which is used as a turn signal during the day;

[0142] 3. Drive the fourth OLED light emitting unit and the second OLED light emitting unit to emit red light in the first light emitting pattern 501 to realize the night position light function, and emit yellow light in the first light emitting pattern 501 to realize the turn signal function;

[0143] 4. Only the third OLED light-emitting unit is driven but a high current or a high voltage is given to realize a high-brightness red light in the first light-emitting pattern 501, which is used as a brake light during the day;

[0144] 5. The fourth OLED light emitting unit and the third OLED light emitting unit are driven simultaneously, but the third OLED light emitting unit does not need to be given a high current or a high voltage, so that a red position light can be realized in the first light emitting pattern 501, and a high-brightness red brake light can be realized in the first light emitting pattern 501, so as to realize a nighttime braking function;

[0145] 6. Simultaneously drive the first, second and third OLED light-emitting units to emit white light in the first light-emitting pattern 501 to realize the daytime reversing light function;

[0146] 7. The first, second and fourth OLED light-emitting units are driven simultaneously, a red position light is emitted in the first light-emitting pattern 501, and a white light is emitted in the first light-emitting pattern 501 as a reversing light, so as to realize a reversing prompt function at night.

[0147] Figure 5a The individual OLED light emitting modules 500 can also be used in combination to form a module, such as Figure 5b As shown in the module 510, it includes multiple Figure 5a The OLED light emitting module 500 shown in FIG. 510 can be combined in various ways. The first light emitting pattern 501 still emits red light and is mainly used as a position light. However, the first light emitting pattern 501, the third light emitting pattern 503 and the fourth light emitting pattern 504 can be combined in different ways to achieve different patterns. For example, if each module 500 uses Figure 3b The architecture, as described above, can realize the yellow turn signal light and the high-brightness red brake signal light functions in the second light-emitting pattern 502, the third light-emitting pattern 503 and the fourth light-emitting pattern 504. However, at this time, the three areas can be combined to realize different patterns of lights with different functions. For example, when the yellow turn signal light is needed, the second light-emitting pattern 502, the third light-emitting pattern 503 and the fourth light-emitting pattern 504 can all be electrically driven to emit yellow light (see above for specific implementation methods), and when the high-brightness red brake signal light function is needed, only the third pattern 503 and the fourth light-emitting pattern 504 are driven, so that the brake signal light and the turn signal light also present different patterns. Similarly, when using Figure 3d When the architecture is used, as described above, the functions of yellow turn signal, high-brightness red brake light and white reverse light can be realized in the second light-emitting pattern 502, the third light-emitting pattern 503 and the fourth light-emitting pattern 504, but in specific implementation, they can also be recombined. For example, when the yellow turn signal is needed, the second light-emitting pattern 502, the third light-emitting pattern 503 and the fourth light-emitting pattern 504 can all be electrically driven to emit yellow light, and when the high-brightness red brake function is needed, only the third light-emitting pattern 503 and the fourth light-emitting pattern 504 are driven, and when the reverse light function is needed, only the second light-emitting pattern 502 is driven. It should be understood that the above combination schemes are only examples, and professionals in this field can design different driving combination modes and light-emitting area patterns according to needs. It should also be understood that in the driving mode, a sequential driving mode, i.e., lighting up one by one, can also be adopted. For example, when lighting up the second light-emitting pattern 502, the third light-emitting pattern 503, and the fourth light-emitting pattern 504 as a yellow turn signal, the second light-emitting pattern 502, the third light-emitting pattern 503, and the fourth light-emitting pattern 504 can be lit up in sequence to achieve a dynamic effect. This driving mode is well known to those in the industry and will not be described in detail here.

[0148] An OLED module of a multifunctional headlight can also separate the multifunctions into different pattern areas, where the different pattern areas are composed of one or more different luminous patterns, and the pattern areas composed of one or more luminous patterns can realize different headlight functions. Figure 6a, 6b The module shown is shown in the top view 600 and the cross-sectional view 601. Figure 6a From the top view 600, the OLED vehicle light module includes a first light emitting pattern area 601, a second light emitting pattern area 602 and a third light emitting area 603, respectively. Figure 6b The second light-emitting pattern area 602 is composed of a light-emitting area enclosed in a plane by a first electrode 6121, a first light-emitting unit 6131, a first part 61221 of the second electrode, a first part 61321 of the second light-emitting unit, and a third electrode 6123 integrated on the substrate 611. The third light-emitting pattern area 603 is composed of a light-emitting area enclosed in a plane by a second part 61222 of the second electrode, a second part 61322 of the second light-emitting unit, and a third electrode 6123 integrated on the substrate 611. The first light-emitting pattern area 601 is enclosed by a third electrode 6123, a third light-emitting unit 6133, and a fourth electrode 6124. In this embodiment, the second electrode and the second light-emitting unit are discontinuous, so it corresponds to Figure 6a Different light-emitting areas in the display can realize different functions and their combinations in different areas. For example, when the first light-emitting unit 6131 emits green light of 510-540nm, and the second light-emitting units 61321, 61322, and the third light-emitting unit 6133 emit red light of 610nm and above, as explained above, the first light-emitting pattern area 601 can realize the function of a red light position light, the second light-emitting pattern area 602 can realize the functions of a yellow light turn signal, a red light position light, and a high-brightness red light brake light, and the third light-emitting pattern area 603 can realize the functions of a position light and a high-brightness red light brake light. At this time, the red light brake light can be realized in both the first light-emitting pattern area 602 and the second light-emitting pattern area 603, and the user can selectively drive it according to needs.

[0149] Similarly, multiple Figure 6a , 6b The combination of modules shown can achieve Figure 6cThe module 620 has a light-emitting area including a pattern area 621 used as a position light, pattern areas 6221, 6222 and 6223 that can be used as yellow turn signals, red position lights, and high-brightness red brake lights, and pattern areas 6211, 6212 and 6213 that can be used as red position lights and high-brightness red brake lights. Similarly, the pattern of each functional light can be further alienated by combining these three pattern areas, for example, driving the three pattern areas 6221, 6222 and 6223 as yellow turn signals, and driving pattern areas 6221 and 6211 as high-brightness red brake lights. Such a module can achieve a more diverse car light display effect, and can also realize a variety of functions including position lights, turn signals and brake lights. Of course, blue light emitting units can be further added to realize the reversing light function, which will not be repeated here. It should be noted that in order to facilitate the extraction of contact electrodes, several pattern areas usually need to have a certain amount of non-overlapping parts, such as the part where pattern area 602 protrudes from pattern area 601 in the above embodiment. Of course, this can also be solved by pre-embedded electrical contacts and conductive vias.

[0150] Figure 7a and 7b Two other multifunctional vehicle lamp OLED light module embodiments 700 and 710 are shown respectively, wherein module 700 includes a first light pattern area 701 and a second light pattern area 702, and module 710 includes a third light pattern area 703 and a fourth light pattern area 704, wherein the first light pattern area 701 and the third light pattern area 703 are exactly the same. The first and third light pattern areas 701 and 703 can be position lights that emit red light, the second light pattern area 702 in module 700 can be a turn signal that emits yellow light, and the fourth light pattern area 704 in module 710 can be a brake light that emits high-brightness red light and a reverse light that emits white light. If modules 700 and 710 are combined, module 720 can be formed. Figure 7c As shown, it may include pattern areas 7011, 7031, 7012 and 7032 for emitting red position lights, pattern areas 7021 and 7022 for emitting yellow turn signals, and pattern areas 7041 and 7042 for emitting high-brightness red brake lights and white reverse lights. Therefore, it can be seen that combining modules with different luminous patterns can provide more design possibilities.

[0151] The multifunctional OLED module for vehicle lights and its combination disclosed in the present invention can realize the diversity of functions and designs by superimposing light-emitting units of different patterns on the same substrate. At the same time, due to the use of OLED light sources, the volume is light and thin, and the integration in the vertical direction further reduces the space occupied by the vehicle lights, providing convenience for vehicle design, reducing power consumption, and improving performance.

[0152] It should be understood that the various embodiments described herein are only examples and are not intended to limit the scope of the present invention. Therefore, as will be apparent to those skilled in the art, the claimed invention may include variations of the specific embodiments and preferred embodiments described herein. Many of the materials described herein may be replaced with other materials without departing from the spirit of the present invention. It should be understood that the various theories about why the present invention works are not intended to be restrictive.

Claims

1. A multifunctional vehicle light module, comprising A substrate, a packaging layer, and a drive system; A first electrode, a second electrode, a third electrode, and a fourth electrode are sequentially arranged between the substrate and the packaging layer; At least three electrodes among the first electrode, the second electrode, the third electrode and the fourth electrode have different patterns; A first OLED light-emitting unit is arranged between the first electrode and the second electrode, a second OLED light-emitting unit is arranged between the second electrode and the third electrode, and a third OLED light-emitting unit is arranged between the third electrode and the fourth electrode; The first OLED light emitting unit emits light of a first peak wavelength, the second OLED light emitting unit emits light of a second peak wavelength, and the third OLED light emitting unit emits light of a third peak wavelength, and at least two of the first peak wavelength, the second peak wavelength, and the third peak wavelength are different; At least one of the first peak wavelength, the second peak wavelength and the third peak wavelength is above 610 nm, and at least one of the peak wavelengths is between 510 and 610 nm; At least two of the first OLED light-emitting unit, the second OLED light-emitting unit and the third OLED light-emitting unit have different light-emitting areas; The first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit are independently driven.

2. The multifunctional vehicle light module as claimed in claim 1, wherein the thickness of the substrate is less than or equal to 0.5 mm, preferably less than or equal to 0.2 mm, and more preferably less than or equal to 0.1 mm; and the substrate is flexible. The multifunctional vehicle light module as claimed in claim 1 , wherein the packaging layer is a flexible packaging layer.

4. The multifunctional vehicle light module according to claim 1, wherein the first electrode is transparent or translucent, the fourth electrode is a metal film layer with reflective properties, the first peak wavelength is less than or equal to the second peak wavelength, and the second peak wavelength is less than or equal to the third peak wavelength; Preferably, the first peak wavelength is between 510-610 nm, the second peak wavelength is equal to the third peak wavelength, and the second peak wavelength and the third peak wavelength are between 610-780 nm; Or preferably, the first peak wavelength is between 510-540 nm, the second peak wavelength is between 541-610 nm, and the third peak wavelength is between 610-780 nm.

5. The multifunctional vehicle light module according to claim 1, wherein the fourth electrode is transparent or translucent, the first electrode is a metal film layer with reflective properties, the first peak wavelength is greater than or equal to the second peak wavelength, and the second peak wavelength is greater than or equal to the third peak wavelength; Preferably, the first peak wavelength is equal to the second peak wavelength, between 610-780 nm, and the third peak wavelength is between 510-610 nm; Or preferably, the first peak wavelength is between 610-780 nm, the second peak wavelength is between 541-610 nm, and the third peak wavelength is between 510-540 nm.

6. The multifunctional vehicle light module as claimed in claim 4 or 5, wherein the second electrode and the third electrode are transparent or translucent, and their materials include Mg, Ag, Yb, Ca, MoOx, hole transport materials, P-type conductive doping materials, electron transport materials, or a combination thereof. 7 . The multifunctional vehicle lamp module as claimed in claim 1 , further comprising a fifth electrode, and a fourth OLED light emitting unit is disposed between the fourth electrode and the fifth electrode, and the fourth OLED light emitting unit emits a fourth peak wavelength.

8. The multifunctional vehicle light module according to claim 1, wherein at least one of the first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit is an inverted structure; preferably, the second OLED light emitting unit is an inverted structure.

9. The multifunctional vehicle light module as described in claim 7, wherein the first electrode is transparent or translucent, the fifth electrode is a metal film layer with reflective properties, the first peak wavelength is 480nm and below, the second peak wavelength is between 510-610nm, the third peak wavelength is equal to the fourth peak wavelength, and is 610nm and above, and preferably, the third peak wavelength is equal to the fourth peak wavelength, and is between 610-780nm.

10. The multifunctional vehicle lamp module as claimed in claim 1, wherein the driving system can select any two of the first electrode, the second electrode, the third electrode and the fourth electrode as anode and cathode and supply power thereto.

11. The multifunctional vehicle light module as claimed in claim 1, wherein the driving system can select any three or more of the first electrode, the second electrode, the third electrode and the fourth electrode to provide gradient power supply.

12. The multifunctional vehicle light module as claimed in claim 1, wherein the driving system can select any three or more of the first electrode, the second electrode, the third electrode and the fourth electrode to provide degenerate power supply.

13. The multifunctional vehicle light module as claimed in claim 1, wherein the light emitting area of ​​at least one of the first OLED light emitting unit, the second OLED light emitting unit and the third OLED light emitting unit is discontinuous; preferably, at least one of the first electrode, the second electrode, the third electrode and the fourth electrode is discontinuous.

14. A multifunctional vehicle light module, comprising a plurality of multifunctional vehicle light modules as claimed in any one of claims 1 to 13, arranged transversely to form a module.

15. The multifunctional vehicle light module as claimed in claim 14, wherein the light emitting areas of at least two multifunctional vehicle light modules are different.

16. The multifunctional vehicle light module as claimed in claim 14, wherein at least two multifunctional vehicle light modules adopt a successive driving mode.

17. A multifunctional vehicle lamp, comprising a plurality of multifunctional vehicle lamp modules according to any one of claims 1 to 13, or a multifunctional vehicle lamp module according to any one of claims 14 to 16.

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