Light-emitting unit, vehicle lamp and vehicle

Abstract

The utility model relates to the technical field of vehicle lamps, in particular to a light-emitting unit, a vehicle lamp and a vehicle, which comprises a printed circuit board (PCB) and a light-emitting diode (LED) chip module arranged on the PCB, the LED chip module comprises a first LED chip set, a second LED chip set, a third LED chip set and a fourth LED chip set which are sequentially arranged; the light-emitting area of the first LED chip set is larger than that of the fourth LED chip set. The light-emitting area of the fourth LED chip set is larger than that of the third LED chip set. The light-emitting area of the fourth LED chip set is larger than that of the second LED chip set. The total number of pixels of the fourth LED chip set is larger than the total number of pixels of the third LED chip set. The total number of pixels of the third LED chip set is greater than that of the first LED chip set; the total number of pixels of the first LED chip set is larger than the total number of pixels of the second LED chip set. The automobile lamp is higher in integration, the production process can be simplified, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, and in particular to a light emitting unit, a vehicle lamp and a vehicle. Background Art

[0002] With the development of technologies such as machine vision, complex sensing, and array light sources, in the field of automotive headlights, in addition to basic low beam and high beam lighting, adaptive high beam systems ADB with anti-glare functions and medium and short-range projection headlights have also been proposed.

[0003] Among them, ADB is an intelligent high beam control system that can adaptively change the high beam pattern according to road conditions. According to the driving status of the vehicle, the environmental status and the status of the road vehicles, the ADB system automatically turns on or off the high beam for the driver. At the same time, according to the position of the vehicle in the field of vision in front of the vehicle, the high beam pattern is adaptively changed to avoid dazzling other road users. Generally, ADB usually closely mounts multiple LED chips on a PCB, uses a projection lens to project the light pattern, and achieves regional shielding by turning off a single LED to prevent dazzling oncoming vehicles or people.

[0004] Medium and short-range projection headlights require the use of more sophisticated LED arrays to achieve more detailed projection, such as μ-LED arrays and Micro-LED arrays, or different optical architectures, such as DLP projection systems.

[0005] In order to make the headlights have more than two functions at the same time, one of the commonly used solutions is to simply combine the modules together and share an appearance structure; or as described in CN213089740U, integrate light source modules with different functions together and use the same lens for projection; or use the same module for functional reuse, such as using μ-LED or Micro-LED array as the light source as described in CN211792120U, to achieve low-pixel projection and high-beam ADB functions at the same time.

[0006] For the above commonly used technical solutions, actual research has found that there are the following defects:

[0007] First, the system integration is low and the module size is large. In order to realize a variety of functional combinations, multiple modules need to be coordinated, and it is inevitable to use multiple light source modules and supporting lenses and control systems.

[0008] Secondly, the production cost is high and the control is complex. In order to meet the requirements of high-precision projection at close range, small light sources such as Micro-LED are required. If you want to cover the far-end large field of view lighting at the same time, you need to use more than 80,000 Micro-LEDs. Since each LED requires an independent control unit, the overall cost and control difficulty will increase. Utility Model Content

[0009] The first object of the utility model is to provide a light-emitting unit to solve the technical problem of realizing module integration and miniaturization.

[0010] The second purpose of the utility model is to provide a vehicle lamp to solve the technical problems of reducing production costs and control difficulty.

[0011] The second purpose of the utility model is to provide a vehicle to solve the technical problems of reducing production costs and control difficulty.

[0012] The light-emitting unit of the utility model is realized as follows:

[0013] A light-emitting unit, comprising: a PCB board and an LED chip module arranged on the PCB board; the LED chip module comprises a first LED chip group, a second LED chip group, a third LED chip group and a fourth LED chip group arranged in sequence; wherein

[0014] The light emitting area of ​​the first LED chipset is larger than the light emitting area of ​​the fourth LED chipset; the light emitting area of ​​the fourth LED chipset is larger than the light emitting area of ​​the third LED chipset; the light emitting area of ​​the fourth LED chipset is larger than the light emitting area of ​​the second LED chipset; and

[0015] The total number of pixels of the fourth LED chip group is greater than the total number of pixels of the third LED chip group; the total number of pixels of the third LED chip group is greater than the total number of pixels of the first LED chip group; the total number of pixels of the first LED chip group is greater than the total number of pixels of the second LED chip group.

[0016] In an optional implementation of the present utility model, the horizontal positions of the first LED chipset, the second LED chipset and the third LED chipset are located on the same straight line;

[0017] The horizontal position center of the fourth LED chipset is offset to one side of a line formed by the horizontal position centers of the first LED chipset, the second LED chipset and the third LED chipset.

[0018] In an optional implementation of the present invention, the light emitting area of ​​a single pixel of the fourth LED chipset is 20×20um2 to 50×50um2; and

[0019] The total number of pixels of the fourth LED chip group is 25K-100K.

[0020] In an optional implementation of the present invention, the light emitting area of ​​a single pixel of the first LED chipset is 80×80um2 to 400×400um2; and

[0021] The total number of pixels of the first LED chip group is 2K to 7K.

[0022] In an optional implementation of the present invention, the light emitting area of ​​a single pixel of the third LED chipset is 40×40um2 to 100×100um2; and

[0023] The total number of pixels of the third LED chip group is 5K to 25K.

[0024] The vehicle lamp of the utility model is realized as follows:

[0025] A vehicle lamp, comprising: a lens unit, at least one of the above-mentioned light-emitting units, and a driving module for controlling each LED chip group on the light-emitting unit; each LED chip group is suitable for being individually controlled by the driving module; and

[0026] The light emitted by the first LED chipset can form high-beam ADB lighting after passing through the lens unit; the light emitted by the second LED chipset can form long-distance driving assistance projection and lighting after passing through the lens unit; the light emitted by the third LED chipset can form medium-distance driving assistance projection and lighting after passing through the lens unit; the light emitted by the fourth LED chipset can form short-distance high-definition interactive projection after passing through the lens unit.

[0027] In an optional implementation of the utility model, the vehicle lamp includes a pair of the light-emitting units used in combination to form a light pattern covering the front area of ​​the vehicle;

[0028] The light pattern covers an area ranging from -20° to +20° in the horizontal direction and from -12° to +5° in the vertical direction.

[0029] In an optional implementation of the present utility model, the light type includes a high beam ADB area light type, a long-distance driving assistance projection area light type, a medium-distance driving assistance projection area light type and a short-distance high-definition interactive projection area light type.

[0030] In an optional implementation of the utility model, the coverage area of ​​the high beam ADB area light pattern in the horizontal direction ranges from -20° to +10°, and the coverage area in the vertical direction ranges from -1.7° to +5°;

[0031] The long-distance driving assistance projection area light pattern covers an area ranging from -20° to +10° in the horizontal direction and a area ranging from -2.3° to -1.7° in the vertical direction;

[0032] The mid-range driving assistance projection area light pattern covers an area ranging from -20° to +10° in the horizontal direction and a area ranging from -5.3° to -2.3° in the vertical direction;

[0033] The close-range high-definition interactive projection area light pattern covers an area ranging from -12° to +15° in the horizontal direction and a area ranging from -12° to -5.3° in the vertical direction.

[0034] The vehicle of the utility model is achieved in this way:

[0035] A vehicle comprises: the above-mentioned vehicle light.

[0036] By adopting the above technical scheme, the utility model has the following beneficial effects: the light-emitting unit of the utility model and the headlights and vehicles using the light-emitting unit, through the first LED chipset, the second LED chipset, the third LED chipset and the fourth LED chipset arranged in sequence on the PCB board, make the light-emitting unit using this structure can simultaneously realize multiple functions of short-range high-precision interactive projection, medium-range driving assistance projection, and high-beam ADB, taking into account the needs of short-range high-precision interactive projection and long-range ADB lighting, thereby making the headlights using the light-emitting unit more integrated, thereby facilitating the miniaturization of the headlights, and there is no need to use multiple light source modules and lenses for the headlights, thereby simplifying the production process and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the layout of the LED chip module of the light-emitting unit of the utility model;

[0038] Figure 2 It is a lighting schematic diagram of the vehicle lamp of the utility model;

[0039] Figure 3 It is a schematic diagram of the light pattern of the vehicle lamp of the utility model.

[0040] In the figure: a first LED chipset 1, a second LED chipset 2, a third LED chipset 3, a fourth LED chipset 4, a driving module 5, a light-emitting unit 6, a lens unit 7, a high-beam ADB lighting 11, a long-distance driving assistance projection and lighting 12, a medium-distance driving assistance projection and lighting 13, a close-range high-definition interactive projection 14, a high-beam ADB regional light type 41, a long-distance driving assistance projection regional light type 42, a medium-distance driving assistance projection regional light type 43, and a close-range high-definition interactive projection regional light type 44. DETAILED DESCRIPTION

[0041] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0042] Embodiment 1:

[0043] See also Figures 1 to 3As shown, this embodiment provides a light-emitting unit, including: a PCB board and an LED chip module arranged on the PCB board; the LED chip module includes a first LED chip group 1, a second LED chip group 2, a third LED chip group 3 and a fourth LED chip group 4 arranged in sequence.

[0044] Specifically, when the light-emitting unit 6 of this embodiment is used in, for example, a car lamp, in conjunction with the lens unit 7 in the car lamp and the driving module 5 for controlling each LED chipset on the light-emitting unit 6, the light emitted by the first LED chipset 1 can form high-beam ADB lighting 11 after passing through the lens unit 7; the light emitted by the second LED chipset 2 can form long-distance driving assistance projection and lighting 12 after passing through the lens unit 7; the light emitted by the third LED chipset 3 can form medium-distance driving assistance projection and lighting 13 after passing through the lens unit 7; and the light emitted by the fourth LED chipset 4 can form short-distance high-definition interactive projection 14 after passing through the lens unit 7.

[0045] Based on the above situation, the light-emitting unit 6 adopting this structure can simultaneously realize multiple functions such as short-range high-precision interactive projection, medium-range driving assistance projection, and long-range ADB, taking into account the needs of short-range high-precision interactive projection and long-range ADB lighting.

[0046] In order to enable the light emitting unit 6 of this embodiment to better take into account the requirements of short-range high-precision interactive projection and long-range ADB lighting, this embodiment also makes the following design:

[0047] First, the light-emitting areas of the four LED chipsets on the PCB are not balanced. Instead, the light-emitting area of ​​the first LED chipset 1 is larger than the light-emitting area of ​​the fourth LED chipset 4; the light-emitting area of ​​the fourth LED chipset 4 is larger than the light-emitting area of ​​the third LED chipset 3; and the light-emitting area of ​​the fourth LED chipset 4 is larger than the light-emitting area of ​​the second LED chipset 2.

[0048] Secondly, the total number of pixels of the fourth LED chipset 4 is greater than the total number of pixels of the third LED chipset 3; the total number of pixels of the third LED chipset 3 is greater than the total number of pixels of the first LED chipset 1; the total number of pixels of the first LED chipset 1 is greater than the total number of pixels of the second LED chipset 2.

[0049] Furthermore, the horizontal position centers of the first LED chipset 1, the second LED chipset 2 and the third LED chipset 3 are located on the same straight line; the horizontal position center of the fourth LED chipset 4 is offset to one side of the line formed by the horizontal position centers of the first LED chipset 1, the second LED chipset 2 and the third LED chipset 3.

[0050] In addition, it should be noted that the light emitting area of ​​a single pixel of the fourth LED chipset 4 is 20×20um2 to 50×50um2; and the total number of pixels of the fourth LED chipset 4 is 25K to 100K. The light emitting area of ​​a single pixel of the first LED chipset 1 is 80×80um2 to 400×400um2; and the total number of pixels of the first LED chipset 1 is 2K to 7K. The light emitting area of ​​a single pixel of the third LED chipset 3 is 40×40um2 to 100×100um2; and the total number of pixels of the third LED chipset 3 is 5K to 25K.

[0051] Next, an optional implementation of the light-emitting unit 6 of this embodiment is used as an example for comparison with the implementation of the conventional Micro-LED light source in the prior art:

[0052]

[0053] In summary, it can be seen that when realizing the same functional scenario, the light-emitting unit 6 of this embodiment only needs to control a total of 51969 pixels, while the use of Micro-LED requires the control of a total of 116139 LEDs, and the control cost is greatly reduced; in medium and long-distance lighting, the light-emitting unit 6 of this embodiment can achieve higher brightness, and its lighting effect is improved by 6% to 12.5% ​​compared with the Micro-LED light source; through the light-emitting unit 6 of this embodiment, single-area control of high-beam ADB angular resolution of 16′, driving assistance projection with a medium and long-distance viewing angle resolution of 8′, and high-definition projection with a close-range angular resolution of 4′ can be realized, which perfectly covers the full range of interaction distances from close to far, driving speeds from low to high, and interaction purposes from personalization to safety.

[0054] Embodiment 2:

[0055] See also Figures 1 to 3 As shown, based on the light-emitting unit 6 of Example 1, this embodiment provides a vehicle lamp, comprising: a lens unit 7, at least one light-emitting unit 6 as in Example 1, and a driving module 5 for controlling each LED chipset on the light-emitting unit 6; each LED chipset is suitable for being individually controlled by the driving module 5; the lens unit 7 and the driving module 5 are not improved, and any mature means in the prior art may be optionally adopted, and this embodiment does not make an absolute limitation on this, so its specific structure and embodiment principle are not repeated here.

[0056] It should be noted here that the vehicle light of this embodiment may use only one light emitting unit 6, or may use multiple light emitting units 6, for example, two light emitting units 6 are relatively distributed on the left and right, or three or four light emitting units 6 may be used, and this embodiment does not make an absolute limitation on this.

[0057] Next, this embodiment takes the case of using a pair of light-emitting units 6 that are relatively distributed on the left and right as an example, that is, a pair of light-emitting units 6 are used in combination to form a light pattern covering the front area of ​​the car; the light pattern formed by the light-emitting units 6 has a coverage area range of -20° to +20° in the horizontal direction and a coverage area of ​​-12° to +5° in the vertical direction.

[0058] More specifically, the light type includes a high-beam ADB regional light type 41, a long-distance driving assistance projection regional light type 42, a medium-distance driving assistance projection regional light type 43, and a short-distance high-definition interactive projection regional light type 44. Among them, the ADB regional light type covers an area range of -20° to +10° in the horizontal direction and a coverage area range of -1.7° to +5° in the vertical direction; the long-distance driving assistance projection regional light type 42 covers an area range of -20° to +10° in the horizontal direction and a coverage area range of -2.3° to -1.7° in the vertical direction; the medium-distance driving assistance projection regional light type 43 covers an area range of -20° to +10° in the horizontal direction and a coverage area range of -5.3° to -2.3° in the vertical direction; the short-distance high-definition interactive projection 14 regional light type covers an area range of -12° to +15° in the horizontal direction and a coverage area range of -12° to -5.3° in the vertical direction.

[0059] In summary, the vehicle lamp of this embodiment can be miniaturized, and there is no need to use multiple light source modules and lenses for the vehicle lamp, so the production process can be simplified and the production cost can be reduced.

[0060] Embodiment 3:

[0061] Based on the vehicle light of Example 2, this embodiment provides a vehicle, including: the vehicle light of Example 2.

[0062] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0063] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A light emitting unit, characterized in that: include: A PCB board and an LED chip module arranged on the PCB board; the LED chip module comprises a first LED chip group, a second LED chip group, a third LED chip group and a fourth LED chip group arranged in sequence; wherein The light emitting area of ​​the first LED chipset is larger than the light emitting area of ​​the fourth LED chipset; the light emitting area of ​​the fourth LED chipset is larger than the light emitting area of ​​the third LED chipset; the light emitting area of ​​the fourth LED chipset is larger than the light emitting area of ​​the second LED chipset; and The total number of pixels of the fourth LED chip group is greater than the total number of pixels of the third LED chip group; the total number of pixels of the third LED chip group is greater than the total number of pixels of the first LED chip group; the total number of pixels of the first LED chip group is greater than the total number of pixels of the second LED chip group.

2. The light emitting unit according to claim 1, characterized in that: The horizontal positions of the first LED chip group, the second LED chip group and the third LED chip group are located on the same straight line; The horizontal position center of the fourth LED chipset is offset to one side of a line formed by the horizontal position centers of the first LED chipset, the second LED chipset and the third LED chipset.

3. The light emitting unit according to claim 1 or 2, characterized in that: The light emitting area of ​​a single pixel of the fourth LED chip group is 20×20um² to 50×50um²; and The total number of pixels of the fourth LED chip group is 25K-100K.

4. The light emitting unit according to claim 1 or 2, characterized in that: The light emitting area of ​​a single pixel of the first LED chip group is 80×80um² to 400×400um²; and The total number of pixels of the first LED chip group is 2K to 7K.

5. The light emitting unit according to claim 1 or 2, characterized in that: The light emitting area of ​​a single pixel of the third LED chip group is 40×40um² to 100×100um²; and The total number of pixels of the third LED chip group is 5K to 25K.

6. A vehicle lamp, characterized in that: include: A lens unit, at least one light emitting unit according to any one of claims 1 to 5, and a driving module for controlling each LED chipset on the light emitting unit; each LED chipset is suitable for being individually controlled by the driving module; as well as The light emitted by the first LED chip group can form high-beam ADB lighting after passing through the lens unit; The light emitted by the second LED chip group can form long-distance driving assistance projection and lighting after passing through the lens unit; The light emitted by the third LED chipset can form mid-range driving assistance projection and lighting after passing through the lens unit; The light emitted by the fourth LED chipset can form a close-range high-definition interactive projection after passing through the lens unit.

7. The vehicle lamp according to claim 6, characterized in that: The vehicle lamp comprises a pair of the light emitting units which are used in combination to form a light pattern covering the front area of ​​the vehicle; The light pattern covers an area ranging from -20° to +20° in the horizontal direction and from -12° to +5° in the vertical direction.

8. The vehicle lamp according to claim 7, characterized in that: The light types include a high beam ADB area light type, a long-distance driving assistance projection area light type, a medium-distance driving assistance projection area light type and a short-distance high-definition interactive projection area light type.

9. The vehicle lamp according to claim 8, characterized in that: The high beam ADB area light pattern covers an area range of -20° to +10° in the horizontal direction and -1.7° to +5° in the vertical direction; The long-distance driving assistance projection area light pattern covers an area ranging from -20° to +10° in the horizontal direction and a area ranging from -2.3° to -1.7° in the vertical direction; The mid-range driving assistance projection area light pattern covers an area ranging from -20° to +10° in the horizontal direction and a area ranging from -5.3° to -2.3° in the vertical direction; The close-range high-definition interactive projection area light pattern covers an area ranging from -12° to +15° in the horizontal direction and a area ranging from -12° to -5.3° in the vertical direction.

10. A vehicle, characterized in that: include: A vehicle lamp as claimed in any one of claims 6 to 9.

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