Vehicle-mounted light source device and vehicle-mounted projection equipment

Abstract

The utility model discloses a kind of vehicle-mounted light source device and vehicle-mounted projection equipment, narrow spectrum light source emits single P state's narrow spectrum light beam, wide spectrum light source is the natural light of unpolarized characteristic, light combining element is based on the selective reflection / transmission mechanism of target waveband, ensure that different spectrum light beam maintains efficient transmission when mixing, avoid the energy waste caused by spectrum mismatch of traditional light source, realize the organic combination of high brightness and wide color gamut.Light combining element separates laser and wide spectrum light beam using polarization state difference, that is, through target waveband optimization S light spectrum distribution, P state laser beam is directly transmitted (or reflected), and part of light (overlap with target waveband and meet the condition of polarization state) in wide spectrum light source is passed, and the rest light is reflected (or transmitted), reduce unnecessary light energy loss, improve the overall efficiency of optical system, narrow spectrum light source provides high brightness, high saturation basic color, wide spectrum light source supplements rich spectrum component, and both are accurately matched by light combining element.

Description

Technical Field

[0001] This utility model relates to the field of vehicle projection technology, and in particular to a vehicle-mounted light source device and a vehicle-mounted projection equipment. Background Technology

[0002] In automotive display systems, the light source is a core element determining image quality, and its performance directly affects the visual experience of drivers and passengers. Traditional projection light source technologies each have their limitations: laser light sources, such as laser diodes (LDs), while possessing advantages in high brightness and wide color gamut, suffer from speckle problems caused by strong coherence, which are particularly pronounced in the dynamic environment of a vehicle. This results in flickering images when the vehicle is in motion, easily distracting the driver. Laser-excited phosphor light sources, under the high-temperature and bumpy conditions of a vehicle, pose risks such as accelerated aging of the phosphor material and severe light decay. Broad-spectrum light sources, such as light-emitting diodes (LEDs), not only struggle to achieve a balance between high brightness and wide color gamut, leading to pale colors and blurred details in the projected image, but also require large heat dissipation and optical components, resulting in a bulky projection system that is difficult to fit into the limited installation space inside a vehicle. Therefore, existing projection light sources cannot meet the stringent requirements of high image quality, stability, and compact design in automotive scenarios, significantly impacting the user's viewing experience and safety. Utility Model Content

[0003] Embodiments of this utility model provide a vehicle-mounted light source device and a vehicle-mounted projection device.

[0004] The technical solution of this utility model is implemented as follows:

[0005] In a first aspect, embodiments of the present invention provide a vehicle-mounted light source device, characterized in that it comprises: a narrow-spectrum light source, a broadband light source, a light combining element, and a first light homogenizing element; wherein,

[0006] A narrow-spectrum light source is used to emit narrow-spectrum beams of at least two different colors. The narrow-spectrum light source includes laser sub-units of at least two different colors. The polarization state of the light emitted by the laser sub-units of at least two different colors is a first polarization state. The first laser sub-units of at least two different colors are integrated and packaged in a single-row arrangement in a structure to form a first mixed-color component. Alternatively, the laser sub-units of at least two different colors are integrated and packaged in two separate structures in a double-row arrangement to form a second mixed-color component and a monochromatic component.

[0007] A broadband light source is used to emit broadband light beams of at least two different colors. The polarization state of the light produced by the broadband light source includes a first polarization state and a second polarization state.

[0008] A beam combiner is used to combine a narrow-spectrum beam emitted from a narrow-spectrum light source and / or a broadband beam emitted from a broadband light source. The beam combiner transmits light with a wavelength in a first polarization state within the target wavelength band and reflects light with a wavelength in a second polarization state within the target wavelength band; or, it reflects light with a wavelength in a first polarization state within the target wavelength band and transmits light with a wavelength in a second polarization state within the target wavelength band. The target wavelength band includes at least a portion of the spectral band of the broadband light source, and the portion of the spectral band includes at least the spectral band of the first laser subunit. The beam color corresponding to the portion of the spectral band is the same as that of the spectral band of the first laser subunit.

[0009] The first light homogenizing element is used to homogenize the combined light beam emitted from the light combining element; wherein, the area of ​​the incident surface of the first light homogenizing element is larger than the area of ​​the light spot on the incident surface of the combined light beam irradiating the first light homogenizing element.

[0010] In the above scheme, the difference between the left end point of a range of the target band and the left end point of the spectral band of the first laser subunit is less than 15 nanometers.

[0011] In the above scheme, the narrow-spectrum beam includes a red narrow-spectrum beam, a green narrow-spectrum beam, and a blue narrow-spectrum beam; the broad-spectrum beam includes a red broad-spectrum beam and a green broad-spectrum beam, and the adjustment range of the driving current of the red narrow-spectrum beam and the red broad-spectrum beam is 0-4.5A and 0-5.5A, respectively; the adjustment range of the driving current of the green narrow-spectrum beam and the green broad-spectrum beam is 0-2.6A and 0-8A, respectively.

[0012] In the above scheme, if the temperature of the vehicle-mounted light source device is higher than the first temperature, the laser subunit in the narrow-spectrum light source that emits a red narrow-spectrum beam is in a non-working state, and the broadband subunit in the broadband light source that emits a red broadband beam is in a working state; if the temperature of the vehicle-mounted light source device is less than or equal to the first temperature, the laser subunit in the narrow-spectrum light source that emits a red narrow-spectrum beam is in a working state, and the broadband subunit in the broadband light source that emits a red broadband beam is either in a working state or in a non-working state.

[0013] In the above scheme, the narrow-spectrum light source faces the first surface of the light combining element, and the broadband light source faces the second surface of the light combining element; wherein, the angle between the narrow-spectrum light beam incident on the first surface of the light combining element and the broadband light beam incident on the second surface of the light combining element is 90 degrees.

[0014] In the above scheme, the first light homogenizing element includes multiple compound eyelets. The incident angles of the combined light beams when they are incident on a single compound eyelet from two different preset viewing angles satisfy the following relationship:

[0015]

[0016] Wherein, α is the incident angle of the combined light beam when it illuminates a single compound eye in the length direction; β is the incident angle of the combined light beam when it illuminates a single compound eye in the width direction; L is the length of a single compound eye; W is the width of a single compound eye; and D is the thickness of the first light homogenizing element.

[0017] In the above scheme, the first light homogenizing element includes a first compound eye element located in a first region and a second compound eye element located in a second region. The first compound eye element is embedded within the second compound eye element. The materials of the first compound eye element and the second compound eye element are at least different.

[0018] The first compound eye element is used for transmitting and homogenizing narrow-spectrum beams, or narrow-spectrum beams and broadband beams.

[0019] The second compound eye element is used for transmitting and homogenizing broadband beams.

[0020] Secondly, this utility model provides a vehicle-mounted projection device, which includes the vehicle-mounted light source device described in any of the first aspects above.

[0021] This utility model provides an in-vehicle light source device and an in-vehicle projection device, including: a narrow-spectrum light source emitting a single P-state narrow-spectrum beam, a broadband light source being unpolarized natural light, and a light combining element based on a selective reflection / transmission mechanism of the target wavelength band to ensure efficient transmission of different spectral beams during mixing, avoiding energy waste caused by spectral mismatch in traditional light sources, and achieving an organic combination of high brightness and wide color gamut. The light combining element uses polarization state differences to separate the laser and the broadband beam, that is, by optimizing the S-light spectral distribution through the target wavelength band, the P-state laser beam is directly transmitted (or reflected), while part of the light from the broadband light source (overlapping with the target wavelength band and meeting the polarization state conditions) passes through, and the remaining light is reflected (or transmitted), reducing unnecessary light energy loss and improving the overall efficiency of the optical system. The narrow-spectrum light source provides high brightness and high saturation basic colors, while the broadband light source supplements rich spectral components, and the two are precisely matched by the light combining element. Attached Figure Description

[0022] Figure 1 A schematic diagram of an optional vehicle-mounted light source device provided for an embodiment of this utility model. Figure 1 ;

[0023] Figure 2 A schematic diagram of an optional narrow-spectrum light source provided for an embodiment of this utility model;

[0024] Figure 3 A schematic diagram of the structural distribution of a laser subunit of an optional narrow-spectrum light source provided for an embodiment of this utility model;

[0025] Figure 4A schematic diagram illustrating a scenario where the P-state and S-state of an optional light-combining element are separated, as provided in an embodiment of this utility model.

[0026] Figure 5 A schematic diagram of an optional narrow-spectrum light source provided for an embodiment of this utility model;

[0027] Figure 6 A schematic diagram illustrating the effect of an optional narrow-spectrum beam ratio on speckle improvement, provided for an embodiment of this utility model;

[0028] Figure 7 A schematic diagram illustrating the effect of an optional ambient temperature on display brightness, provided for an embodiment of this utility model;

[0029] Figure 8 A schematic diagram of the structure of an optional first light homogenizing element provided in an embodiment of this utility model;

[0030] Figure 9 A schematic diagram of an optional vehicle-mounted light source device provided for an embodiment of this utility model. Figure 2 ;

[0031] Figure 10 A schematic diagram of an optional vehicle-mounted optical architecture provided for an embodiment of this utility model. Figure 1 ;

[0032] Figure 11 A schematic diagram of an optional vehicle-mounted optical architecture provided for an embodiment of this utility model. Figure 2 ;

[0033] Figure 12 A schematic diagram of an optional vehicle-mounted optical architecture provided for an embodiment of this utility model. Figure 3 ;

[0034] Figure 13 A schematic diagram of an optional vehicle-mounted optical architecture provided for an embodiment of this utility model. Figure 4 ;

[0035] Figure 14 A schematic diagram of an optional vehicle-mounted optical architecture provided for an embodiment of this utility model. Figure 5 ;

[0036] Figure 15 A schematic diagram of an optional vehicle-mounted optical architecture provided for an embodiment of this utility model. Figure 6 ;

[0037] Figure 16 This is a schematic diagram of the structure of an optional vehicle-mounted projection device provided for an embodiment of the present utility model. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] This utility model embodiment provides a vehicle-mounted light source device, see [link]. Figure 1 , Figure 1 The diagram shown is a structural schematic of an on-board light source device 100, which includes: a narrow-spectrum light source 1, a broadband light source 2, a light combining element 3, and a first light homogenizing element 4; wherein,

[0042] Narrow-spectrum light source 1 is used to emit narrow-spectrum light beams of at least two different colors. Narrow-spectrum light source 1 includes laser sub-units of at least two different colors. The polarization state of the light emitted by the laser sub-units of at least two different colors is a first polarization state. The first laser sub-units of at least two different colors are integrated and packaged in a single-row arrangement in a structure to form a first color mixing component. Alternatively, the laser sub-units of at least two different colors are integrated and packaged in two separate structures in a double-row arrangement to form a second color mixing component and a single-color component.

[0043] Broadband light source 2 is used to emit broadband light beams of at least two different colors. The polarization state of the light generated by the broadband light source 2 includes a first polarization state and a second polarization state.

[0044] The beam combining element 3 is used to combine the narrow-spectrum beam emitted from the narrow-spectrum light source 1 and / or the broadband beam emitted from the broadband light source 2. The beam combining element 3 transmits light with a wavelength in a first polarization state in the target wavelength band and reflects light with a wavelength in a second polarization state in the target wavelength band, or reflects light with a wavelength in a first polarization state in the target wavelength band and transmits light with a wavelength in a second polarization state in the target wavelength band. The target wavelength band includes at least a portion of the spectral band of the broadband light source. The portion of the spectral band includes at least the spectral band of the first laser subunit. The beam color corresponding to the spectral band of the portion of the spectral band is the same as that of the beam from the first laser subunit.

[0045] The first light homogenizing element 4 is used to homogenize the combined light beam emitted from the light combining element 3; wherein, the area of ​​the incident surface of the first light homogenizing element 4 is larger than the area of ​​the light spot on the incident surface of the combined light beam irradiating the first light homogenizing element 4.

[0046] Narrow-spectrum light sources can emit light beams of at least two different colors with narrow spectral ranges, such as red (R) narrow-spectrum beams, green (G) narrow-spectrum beams, and blue (B) narrow-spectrum beams. Narrow-spectrum light sources can be LD light sources or tri-color LD light sources.

[0047] Here, the narrow-spectrum light source consists of multiple laser subunits, and the light emitted by these laser subunits has a specific first polarization state, which can be a P-state. For example... Figure 2 As shown, the arrangement and packaging methods of laser sub-units include the following methods.

[0048] The first type, such as Figure 2 The left image and Figure 3 In the left figure, multiple laser sub-units are integrated in a single column within the same structure to form a first color mixing component 11. This means the first color mixing component emits lasers of multiple colors, and can combine the lasers of different colors emitted in a sequential manner with the light from a broadband light source. For example, the first color mixing component is composed of three different colored laser sub-units: a red laser sub-unit, a green laser sub-unit, and a blue laser sub-unit. The narrow-spectrum sub-unit is a small chip. The three colored laser sub-units are arranged side-by-side, and the light emitted by all three propagates along the same optical path, reducing the number of lenses used for light combining, improving structural compactness, and reducing the occupied volume. The number of the three colored laser sub-units can be configured as follows: two red laser sub-units, two green laser sub-units, and one blue laser sub-unit, thus improving structural compactness and reducing the occupied volume.

[0049] The second type, such as Figure 2 The intermediate image and Figure 3As shown in the right figure, multiple laser sub-units are packaged in two separate structures in a double row, forming a second color mixing component 12 and a monochromatic component (such as a red monochromatic component) 13. That is, the color of the laser emitted by the monochromatic component is different from the color of the laser emitted by the second color mixing component. The light from the monochromatic component and the light from the second color mixing component are combined to form a combined laser beam, which is then combined with the light emitted by the broadband light source. For example, the second color mixing component is integrated from two different colored laser sub-units, specifically a blue laser sub-unit and a green laser sub-unit, while the monochromatic component is specifically composed of a red laser sub-unit. The narrow-spectrum sub-unit is a small chip. The blue and green laser sub-units are arranged side-by-side, and the light emitted by both propagates along the same optical path, reducing the number of lenses used for beam combining, improving structural compactness, and reducing the occupied volume. The second color mixing component can have three green laser sub-units and two blue laser sub-units, while the monochromatic component has five red laser sub-units arranged side-by-side. The second color mixing component and the monochromatic component are arranged side-by-side to form an overall narrow-spectrum light source, resulting in a compact structure that is easy to arrange. The light emitted by the second color mixing component and the single-color component are emitted in the same direction. There is a certain distance between the second color mixing component and the single-color component, so the light beams emitted by the two are parallel to each other and have a certain distance. The light beams emitted by the two cannot be directly combined and need to be combined.

[0050] The third type, such as Figure 2 As shown in the right figure, the three laser sub-units in the narrow-spectrum light source are encapsulated in three columns within three independent structures, forming a blue monochromatic component 14, a green monochromatic component 15, and a red monochromatic component 13. This means that the lasers emitted by the different color monochromatic components are of different colors, and the light emitted by multiple different color monochromatic components is combined with the light emitted by the broadband light source. The three monochromatic components are arranged side-by-side to form the overall narrow-spectrum light source, resulting in a compact structure that is easy to arrange. The light emitted by the three monochromatic components is emitted in the same direction, and there is a certain distance between the three monochromatic components, so the beams emitted by the three are parallel to each other and have a certain spacing. The beams emitted by the three cannot be directly combined and require a combining process.

[0051] It should be noted that the number of laser subunits emitting different colors in different arrangements and packaging methods within a narrow-spectrum light source is related to the display brightness. If the display brightness is less than a first brightness threshold, such as 1600 nits, the first arrangement and packaging method is selected. If the display brightness is greater than or equal to the first brightness threshold, the second arrangement and packaging method is selected.

[0052] Among them, a broadband light source can emit light beams of at least two different colors with a wide spectral range, such as a red broadband beam, a green broadband beam, and a blue broadband beam. The broadband light source can be an LED light source.

[0053] Here, the broadband light beam emitted by the broadband light source contains two polarization states: a first polarization state and a second polarization state. The vibration direction of the second polarization state is different from that of the first polarization state, and the second polarization state can be an S-state. In automotive lighting devices, it works in conjunction with a narrow-spectrum light source to provide a richer spectrum.

[0054] Here, the broadband light source includes multiple broadband sub-units. Each broadband sub-unit emits a broadband beam of a different color, and each broadband sub-unit is a separate unit. The positions of each broadband sub-unit may be the same or different.

[0055] The light combining element can be a substrate with double-sided coating. The coating process enables the light combining element to achieve the desired transmission and reflection characteristics. The coating method can be selected based on the polarization characteristics and wavelength of the light. Specifically, the light combining element can transmit (or reflect) light in the first polarization state (P-state) of the target wavelength band and reflect (or transmit) light in the second polarization state (S-state). Here, the target wavelength band includes both broadband and narrowband beams within that band. It should be noted that the target wavelength band includes at least a portion of the spectral band of the broadband light source, and this portion includes at least the spectral band of the first laser subunit (i.e., the green laser subunit). In this way, the beams from the narrowband and broadband light sources are efficiently mixed to output a combined beam that meets the requirements.

[0056] In one implementation, reference is made to Figure 4 and Figure 1 The right figure illustrates the concept of a beam combiner transmitting P-state light with a wavelength in the target band and reflecting S-state light with a wavelength in the target band. The S-state is determined based on the coating of the beam combiner. The S-state can be either a first S-state or a second S-state. A first S-state occurs when the coating of the beam combiner begins to degrade before 480 nm, resulting in only half of the broadband beam being reflected, leading to a reflection efficiency of only half. A second S-state occurs when the coating of the beam combiner begins to degrade before 530 nm, resulting in a higher reflection efficiency for the broadband beam. To improve the reflection efficiency of the broadband beam, the S-state can be the second S-state.

[0057] Here, the light combining element transmits the green narrow-spectrum beam, red narrow-spectrum beam, and blue narrow-spectrum beam emitted from the green laser subunit in the P state. The target wavelength includes at least a portion of the spectral wavelength of the broadband light source. The spectral wavelength of the broadband light source includes the spectral wavelength of the green laser subunit, and the beam color corresponding to a portion of the spectral wavelength is at least partially the same as the beam color corresponding to the spectral wavelength of the first laser subunit.

[0058] The first light homogenizing element is used to improve the uniformity of the combined light beam emitted by the light combining element, making the beam distribution more uniform. The area of ​​the incident surface of the first light homogenizing element is larger than the area of ​​the light spot formed by the combined light beam, thus fully receiving and processing the beam, eliminating intensity unevenness in the beam, ensuring uniform and stable output light, and improving the quality of the in-vehicle display.

[0059] As described above, firstly, the narrow-spectrum light source emits a narrow-spectrum beam with a single polarization state (P-state) from its laser subunit, while the broadband light source (such as an LED) emits unpolarized natural light. The beam combiner can selectively combine the beams based on wavelength and polarization state. The beam combiner transmits (or reflects) the target P-state wavelength (covering the green laser wavelength) and reflects (or transmits) the S-state wavelength, ensuring that the laser beam and the broadband beam do not interfere with each other on their transmission paths, reducing light energy loss caused by spectral overlap or polarization conflict. Simultaneously, by optimizing the S-light spectral distribution through the target wavelength, reflection loss from the broadband light source at the beam combiner is minimized, improving overall beam combining efficiency. Secondly, the narrow-spectrum light source provides high brightness and high saturation basic colors, while the broadband light source supplements rich spectral components. The two are precisely matched through the beam combiner. Based on the selective reflection / transmission mechanism of the target wavelength, the beam combiner ensures efficient transmission of different spectral beams during mixing, avoiding energy waste caused by spectral mismatch in traditional light sources, and achieving an organic combination of high brightness and wide color gamut. The beam combiner utilizes polarization state differences to separate laser light from broadband beams, allowing precise control over the transmission paths and mixing ratios of different beams. P-state laser beams are directly transmitted (or reflected), while a portion of the broadband light (overlapping with the target wavelength and meeting the polarization state requirements) also passes smoothly, with the remaining light being reflected (or transmitted). This precise control reduces unnecessary light energy loss and improves the overall efficiency of the optical system. The first beam homogenization element receives the combined beam through a large-area incident surface, further homogenizing the beam intensity and eliminating potential brightness unevenness during beam combining. Combined with the beam combiner's low-loss design, the output beam quality is effectively improved, ensuring consistent brightness and uniform color in the vehicle display, enhancing visual comfort. Finally, the modular packaging (single-row or dual-row integration) of the narrow-spectrum light source reduces space occupation. The beam combiner's polarization and wavelength-based beam combining mechanism simplifies the optical structure, resulting in a compact overall device that fits the space constraints of automotive applications. Simultaneously, the beam combiner can flexibly adjust its reflection / transmission characteristics to adapt to different combinations of narrow-spectrum lasers and broadband light sources, reducing system development costs and adaptation difficulties.

[0060] In some embodiments, the difference between the left endpoint of a range of the target band and the left endpoint of the spectral band of the first laser subunit is less than 15 nanometers.

[0061] The left end of the spectral band of the first laser subunit (i.e., the green laser subunit) can be 525 nanometers (nm).

[0062] The fact that the difference between the left endpoint of a range of the target wavelength band and the left endpoint of the spectral band of the green laser subunit is less than 15 nanometers can be understood as the left endpoint of the range of the target wavelength band being the left endpoint of the spectral band of the green laser subunit, which is 525nm + (0-15)nm. That is, the left endpoint of a range of the target wavelength band can be 525 + 0 = 525nm. Of course, the left endpoint of a range of the target wavelength band can be 525 + 15 = 540nm. In other words, the left endpoint of a range of the target wavelength band can be any number between 525nm and 540nm.

[0063] The target band can be any spectral band of a broadband light source that extends beyond the left end of the target band.

[0064] Here, continue to refer to Figure 4 Since the target wavelength covers a portion of the broadband light source's spectral band, the combining element reflects (or transmits) a portion of the light from the broadband light source in the S-state of the target wavelength. In other words, not all the light emitted by the broadband light source can be incorporated into the combined beam; some of the light emitted by the broadband light source is lost. Specifically, the lost portion of the light emitted by the broadband light source includes a portion of the light in the P-state that is not in the target wavelength. To improve the utilization rate of the broadband light source and reduce its losses to increase the output brightness of the combined beam, the left endpoint of the target wavelength range is close to the spectral band of the green laser subunit, so that as much light emitted by the broadband light source as possible is reflected (or transmitted) into the combined beam. Preferably, the difference between the left endpoint of the target wavelength range and the left endpoint of the spectral band of the green laser subunit is within 15 nm. Specifically, as shown... Figure 4As shown, the target band includes a spectral range greater than (525 + (0 - 15)) nm, specifically including spectral bands of 525 nm and 650 nm. 525 nm is the spectral band of the green laser subunit, and 650 nm is the spectral band of the red laser subunit. The spectral band of the broadband light source includes 480 nm to 700 nm, and the broadband beam includes P-state broadband beams and S-state broadband beams. Thus, when the light is combined by the light combining element, the S-state broadband beam in the range of (525 + (0 - 15)) nm to 700 nm emitted by the broadband light source merges into the combined beam, while the light in the range of 480 nm to (525 + (0 - 15)) nm emitted by the broadband light source merges into the combined beam. The P-state broadband beam in the 25+(0-15)nm band will be lost. In order to better improve the brightness of the projected image, the target band range can be set to 532nm~700nm. The spectral band of the P-state light covers the wavelength of the P-state green narrow-band beam. The left end of the spectral band of the S-state light is as far to the left as possible. That is to say, the left end of the target band is closer to the spectral band of the green laser subunit. The S-state broadband beam can be reflected (or transmitted) in the 532~560nm range, thereby improving the reflectivity of the broadband beam, that is, improving the utilization rate of the broadband beam, thereby reducing the loss of the broadband light source during light combination and improving the output brightness of the combined beam.

[0065] In some embodiments, continue to refer to Figure 2 In the left figure, the light emitted by the first color mixing component 11 is guided to the light combining element 3 by the first light guiding component 5. The first light guiding component 5 includes one or more of the following: a polarization conversion element 51, a diffusion element 52, a second light homogenizing element 53, and a first lens 54.

[0066] The polarization conversion element 51 is located in the optical path of the narrow-spectrum beam of the first part of the first polarization state of the first polarization state emitted from the first color mixing component 11, and is used to perform phase shifting on the narrow-spectrum beam of the first part of the first polarization state. The polarization conversion element can be a half-wave plate or a depolarizer. The half-wave plate is also called a 1 / 2 wave plate or λ / 2.

[0067] The diffusion element 52 is located in the optical path of the narrow-spectrum beam emitted from the first color mixing component 11, and is used to dissipate the narrow-spectrum beam of the first residual color in the first polarization state emitted from the first color mixing component 11 and the narrow-spectrum beam of the second polarization state emitted from the polarization conversion element 51; wherein, at least two different colors include a first partial color and a second residual color; the diffusion element can be such as a dynamic diffusion sheet or a static diffusion sheet, and the effect of dissipating and homogenizing the light spot is achieved by the dynamic displacement of the diffusion sheet;

[0068] The second light homogenizing element 53 is located between the diffusion element 52 and the first lens element 54, and is used to homogenize the light of at least narrow-spectrum beams of different colors; the second light homogenizing element can be a compound eye.

[0069] The first lens 54 is used to shape the narrow-spectrum beam emitted from the diffusion element 52 and then emit it to the beam combining element 3. The first lens can be a collimating lens.

[0070] In this embodiment of the invention, the first polarization state, such as the P state, of the first part of the narrow-spectrum light beam (e.g., red and blue narrow-spectrum beams) emitted by the first color mixing component is phase-shifted by the polarization conversion element to obtain the second polarization state, namely the S state, of the red and blue narrow-spectrum beams. The first color mixing component emits the P state of the first remaining color narrow-spectrum beam (e.g., green narrow-spectrum beam), and the S state of the red and blue narrow-spectrum beams are diffused by the diffusion element and then reach the second light homogenizing element. The second light homogenizing element homogenizes the S state of the red and blue narrow-spectrum beams and the P state of the green narrow-spectrum beam, and then collimates them through the first lens, thereby inputting the uniform, parallel, high-quality narrow-spectrum beams into the light combining element for light combining.

[0071] As described above, firstly, by changing the polarization state of the red and blue beams through a polarization conversion element, the polarization properties of different colored beams are differentiated. For example, the polarization state of the red-blue narrowband beam is S-state, while the polarization state of the green narrowband beam is P-state, opposite to the former. This prevents interference between the red-blue and green narrowband beams, effectively suppressing speckle. Simultaneously, combined with the dissipation processing of the diffusion element, the laser speckle effect is further effectively suppressed, reducing irregular patterns on the image, improving the clarity of the projected image, and optimizing the image quality of in-vehicle displays. Secondly, targeted processing of red, blue, and green beams allows for precise control of the distribution and mixing of each color, ensuring higher color fidelity and more natural color transitions, meeting users' needs for high color gamut displays. Then, a second light homogenization element homogenizes the beams of different polarization states and colors, eliminating uneven beam intensity and ensuring consistent brightness in the final output beam, avoiding differences in brightness and darkness in the image, and improving the overall visual experience. Finally, the collimation process of the first lens can adjust the beam into parallel light, which is beneficial to the directional transmission and precise projection of the beam, improves the light energy utilization rate, and facilitates the integration and design of subsequent optical systems, adapting to the installation requirements of the compact space of the vehicle display system.

[0072] In some embodiments, continue to refer to Figure 2 In the intermediate diagram, the light emitted by the second color mixing component 12 and the monochromatic component 13 is guided by the first light guiding component 5 to the light combining element 3. The first light guiding component 5 may further include a reflective element 55 and a first light splitting element 56.

[0073] The reflective element 55 is located in the optical path of the narrow-spectrum beam of the second part of the first polarization state emitted from the second color mixing component 12, and is used to reflect the narrow-spectrum beam of the second part of the first polarization state emitted from the second color mixing component 12 to the first beam splitter 56. The reflective element can be a mirror.

[0074] The first beam splitter 56 is located in the optical path of the narrow-spectrum beam of the second part color of the first polarization state emitted from the reflector 55 and the narrow-spectrum beam of the second residual color of the first polarization state emitted from the monochromatic component. It is used to reflect the narrow-spectrum beam of the second part color of the first polarization state and transmit the narrow-spectrum beam of the second residual color of the first polarization state. The at least two different colors include the second part color and the second residual color. The second part color is not exactly the same as the first part color. The first beam splitter can be a dichroic mirror.

[0075] In this embodiment of the invention, the narrow-spectrum light beam of the second part of the color in the first polarization state, such as the P state (e.g., a green narrow-spectrum beam and a blue narrow-spectrum beam), emitted by the second color mixing component, is reflected and guided to the first beam splitter by a reflective element. The narrow-spectrum light beam of the second remaining color in the P state (e.g., a red narrow-spectrum beam) emitted by the monochromatic component is emitted and then emitted to the first beam splitter. The light emitted by the second color mixing component and the light emitted by the monochromatic component are combined by the first beam splitter. The first beam splitter reflects the light emitted by the second color mixing component and transmits the light emitted by the monochromatic component; that is, the first beam splitter reflects green and blue light and transmits red light. For example, the spectrum of the first beam splitter is set to reflect light at 465nm and 525nm and transmit light greater than 630nm. Of course, the light combining method can also be changed to other methods. For example, the light emitted by the second color mixing component is emitted to the first beam splitter, and the light emitted by the monochromatic component is guided to the first beam splitter through a reflector. The light emitted by the second color mixing component and the light emitted by the monochromatic component are also combined through the first beam splitter. At this time, the first beam splitter transmits the light emitted by the second color mixing component and reflects the light emitted by the monochromatic component. That is, the first beam splitter transmits green and blue light and reflects red light. Further, the P-state red narrow-spectrum beam and the blue narrow-spectrum beam are phase-shifted by a polarization conversion element to obtain the S-state red narrow-spectrum beam and the blue narrow-spectrum beam. The P-state green narrow-spectrum beam and the S-state red narrow-spectrum beam and the blue narrow-spectrum beam are diffused by a diffusion element and then reach the second light homogenizing element. The second light homogenizing element homogenizes the S-state red narrow-spectrum beam and the blue narrow-spectrum beam and the P-state green narrow-spectrum beam, and then collimates them through a first lens, thereby inputting a uniform, parallel, high-quality narrow-spectrum beam into the light combining element for light combining.

[0076] As described above, firstly, by selectively reflecting and transmitting narrow-spectrum beams of different colors using the first beam-splitting element, precise combining of green, blue, and red beams can be achieved. Compared to traditional mixing methods, this reduces light energy loss, improves beam mixing efficiency, and provides a high-quality base beam for subsequent optical processing. Secondly, polarization conversion is performed on the P-state red and blue narrow-spectrum beams to obtain S-state beams. For example, the polarization state of the red-blue narrow-spectrum beam is S-state, while the polarization state of the green narrow-spectrum beam is P-state, opposite to the former. This prevents interference between the red-blue and green narrow-spectrum beams, effectively suppressing speckle. Simultaneously, combined with the dissipation processing of the diffusion element, further combining the diffusion element's dissipation processing of beams with different polarization states and colors effectively disrupts light coherence, suppresses laser speckle, solves the problem of image pattern interference in automotive displays using traditional laser light sources, and improves image clarity and stability. Finally, targeted processing of red, blue, and green beams allows for precise control of the distribution and mixing of each color, ensuring higher color fidelity and more natural color transitions, meeting users' needs for high color gamut displays. Then, the second light homogenizing element homogenizes the light beams of different polarization states and colors, eliminating beam intensity unevenness and ensuring consistent brightness in the final output beam. This prevents differences in brightness and darkness in the image, improving the overall visual experience. Finally, the collimation process of the first lens adjusts the beam into parallel rays, which is beneficial for directional beam transmission and precise projection, improving light energy utilization. It also facilitates the integration and design of subsequent optical systems, adapting to the compact installation requirements of automotive display systems.

[0077] In some embodiments, continue to refer to Figure 2 In the right figure, the light emitted by the three monochromatic components 13, 14 and 15 is guided to the light combining element 3 by the first light guiding component 5. The first light guiding component 5 may also include a second beam splitter 57, which is located between the reflective element 55 and the first beam splitter 56. The second beam splitter 57 transmits a blue narrow-spectrum beam of the first polarization state and reflects a green narrow-spectrum beam of the first polarization state. The second beam splitter may be a dichroic mirror.

[0078] In this embodiment of the invention, a narrow-spectrum blue beam of light in a first polarization state, such as the P-state, emitted by the blue monochromatic component is guided to the second beam splitter by a reflective element. A narrow-spectrum green beam of light in the P-state emitted by the green monochromatic component exits to the second beam splitter. The blue narrow-spectrum blue beam emitted by the blue monochromatic component and the green narrow-spectrum green beam emitted by the green monochromatic component are combined by the second beam splitter and then exit to the first beam splitter. A narrow-spectrum red beam of light in the P-state emitted by the red monochromatic component exits to the first beam splitter. The combined beam emitted by the second beam splitter is combined with the light emitted by the red monochromatic component by the first beam splitter. The first beam splitter reflects the combined beam emitted by the second beam splitter and transmits the light emitted by the red monochromatic component. In other words, the first beam splitter reflects green and blue light and transmits red light. For example, the spectrum of the first beam splitter is set to reflect light at 465nm and 525nm and transmit light greater than 630nm. Of course, the beam combining method can also be changed to other methods, which will not be described in detail here. Furthermore, the P-state red and blue narrow-spectrum beams are phase-shifted by a polarization conversion element to obtain the S-state red and blue narrow-spectrum beams. The P-state green narrow-spectrum beam, as well as the S-state red and blue narrow-spectrum beams, are diffused by a diffusion element and then reach the second light homogenizing element. The second light homogenizing element homogenizes the S-state red and blue narrow-spectrum beams and the P-state green narrow-spectrum beam, and then collimates them through a first lens, thereby inputting a uniform, parallel, high-quality narrow-spectrum beam into a beam combining element for beam combining.

[0079] In some embodiments, refer to Figure 5 As shown, the broadband light source 2 includes at least one broadband sub-unit of different colors, including a red broadband sub-unit 21. The vehicle-mounted light source device also includes a second light guiding component 6, which may include a collimating lens corresponding to at least one broadband sub-unit of different colors. The light emitted by the red broadband sub-unit 21 passes through the collimating lens and reaches the light combining element 3.

[0080] In the first feasible approach, refer to Figure 5 In (1), the broadband light source 2 includes a red broadband subunit 21. The red broadband beam emitted by the red broadband subunit 21 is collimated by the collimating lens 61 and then guided to the beam combining element 3 for beam combining. In this way, the collimating lens is directly attached to the red broadband subunit, eliminating the need for a complex relay optical path, reducing the overall structural thickness, and adapting to the internal space constraints of compact equipment such as vehicle-mounted light source devices.

[0081] In the second possible implementation, refer to Figure 5In (2), the broadband light source 2 includes a red broadband subunit 21, and the second light guiding component 6 may also include a second beam splitter 62. The second beam splitter can be a reflector or a dichroic mirror, and it can reflect the red broadband beam. The red broadband beam emitted by the red broadband subunit 21 is collimated by the collimating lens 61 and then reflected by the second beam splitter 62 to the beam combining element 3 for beam combining. In this way, the second beam splitter changes the path of the red broadband beam by reflection, without the need to redesign the position of the light source. It can achieve optical path bending in a limited space, making the structure of the vehicle light source device more compact and effectively saving internal space. With the collimating lens, the second beam splitter accurately reflects the collimated red broadband beam to the beam combining element, reducing beam offset and loss, ensuring beam combining accuracy, and improving the overall stability of the optical system.

[0082] In the third possible implementation method, refer to Figure 5 In (3), the broadband light source 2 includes a red broadband subunit 21 and a green broadband subunit 22. The second light guiding component 6 may also include a collimating lens 63. The second beam splitter may be a dichroic mirror, which can reflect the red broadband beam and transmit the green broadband beam. The red broadband beam emitted by the red broadband subunit 21 is collimated by the collimating lens 61 and reaches the second beam splitter 62. The green broadband beam emitted by the green broadband subunit 22 is collimated by the collimating lens 63 and reaches the second beam splitter 62. The second beam splitter 62 reflects the red broadband beam and transmits the green broadband beam, guiding it to the beam combining element 3 for beam combining. Of course, if the positions of the red broadband subunit 21 and the green broadband subunit 22 are interchanged, the second beam splitter can transmit the red broadband beam and reflect the green broadband beam. The red broadband beam emitted by the red broadband subunit 21 is collimated by the collimating lens 61 and then reaches the second beam splitter 62. The green broadband beam emitted by the green broadband subunit 22 is collimated by the collimating lens 63 and then reaches the second beam splitter 62. The second beam splitter 62 transmits the red broadband beam and reflects the green broadband beam, guiding it to the beam combiner 3 for beam combining. Thus, by utilizing the selective reflection / transmission characteristics of dichroic mirrors for different colored beams, the red and green broadband beams are combined on the same element, simplifying the optical structure and reducing the device size. The modular design tightly integrates the collimating lens, dichroic mirror, and broadband light source subunit, reducing optical path redundancy. Compared to the traditional discrete component layout, this reduces the internal space occupied by the vehicle-mounted light source device, making it suitable for compact installation environments within vehicles.

[0083] In the fourth possible implementation method, refer to Figure 5In (4), the broadband light source 2 includes a red broadband subunit 21, a green broadband subunit 22, and a blue broadband subunit 23. The second light guiding component 6 may also include a collimating lens 65 and a third beam splitter 64. The third beam splitter may be a dichroic mirror. The third beam splitter may reflect the green broadband beam and transmit the blue broadband beam. The second beam splitter may also transmit the blue broadband beam. The blue broadband beam emitted by the blue broadband subunit 23 is collimated by the collimating lens 65 and transmitted by the third beam splitter 64 to the second beam splitter 62. The green broadband beam emitted by the green broadband subunit 22 is collimated by the collimating lens 63 and reflected by the third beam splitter 64 to the second beam splitter 62. The red broadband beam emitted by the red broadband subunit 21 is collimated by the collimating lens 61 and then reaches the second beam splitter 62. The second beam splitter 62 reflects the red broadband beam and transmits the green and blue broadband beams before guiding them to the beam combining element 3 for beam combining. It should be noted that the three broadband sub-units can be adjusted in position and aligned with the thin-film characteristics of their corresponding beam-splitting elements to ensure that the light emitted by all three reaches the beam-combining element. In this way, through the selective reflection and transmission of red, green, and blue broadband beams by dichroic mirrors, the three beams are combined within a very small space. Compared to traditional independent optical path designs, this significantly reduces the number of optical components and space occupation, allowing for a smaller device size suitable for space-sensitive applications such as automotive applications. The adjustable positions of the broadband sub-units and the thin-film characteristics of the beam-splitting elements enable rapid adaptation to different light source layouts and spectral requirements, reducing system development costs and timelines, while also ensuring compatibility with subsequent light source upgrades or replacements, enhancing system versatility.

[0084] In the fifth possible implementation method, refer to Figure 5In (5), the broadband light source 2 includes a red broadband subunit 21, a green broadband subunit 22, and two blue broadband subunits 23. The green broadband subunit 22 may integrate a phosphor sheet and a blue excitation unit. The phosphor sheet includes a fluorescence conversion material, which is used to generate a green broadband beam (such as a green fluorescent beam). The second light guiding component 6 may also include a collimating lens 66. The third beam splitter 64 may be a dichroic mirror. The third beam splitter 64 may reflect the blue broadband beam and transmit the green broadband beam. The second beam splitter 62 may also transmit the blue broadband beam. The blue broadband beam emitted from the upper blue broadband subunit 23 is collimated by collimating lens 66 and reflected by the third beam splitter 64. After passing through collimating lens 63, it reaches the green broadband subunit 22. Since the green broadband subunit 22 integrates a phosphor, the blue broadband beam irradiates the phosphor in the green broadband subunit 22. The phosphor conversion material in the phosphor generates a green broadband beam, which is reflected by the chip itself of the green broadband subunit 22, collimated by collimating lens 63, and transmitted through the third beam splitter 64 to the second beam splitter 62. The blue broadband beam emitted from the lower blue broadband subunit 23 is collimated by collimating lens 65 and reflected by the third beam splitter 64 to the second beam splitter 62. The blue excitation light emitted from the blue excitation unit in the green broadband subunit 22 generates a green broadband beam through the phosphor conversion material in the phosphor. The green broadband beam is collimated by collimating lens 63 and transmitted through the third beam splitter 64 to the second beam splitter 62. The red broadband beam emitted by the red broadband subunit 21 is collimated by the collimating lens 61 and then reaches the second beam splitter 62. Further, the second beam splitter 62 reflects the red broadband beam and transmits the green and blue broadband beams to the beam combiner 3 for beam combining. Thus, the blue broadband beam, through dual-path coordination, participates directly in beam combining, while the other path excites the green broadband subunit (whose phosphor emits green light and can actively emit light). This dual mechanism significantly improves the green broadband beam generation efficiency. Simultaneously, the double-sided layout combined with multiple blue broadband subunits forms a redundant design. If a single blue broadband subunit or a single green broadband subunit malfunctions, the other part can operate independently, ensuring stable operation of the light source system and continuous, stable output of the combined beam.

[0085] In some embodiments, the narrow-spectrum beam includes a red narrow-spectrum beam, a green narrow-spectrum beam, and a blue narrow-spectrum beam; the broad-spectrum beam includes a red broad-spectrum beam and a green broad-spectrum beam, the driving current adjustment ranges of the red narrow-spectrum beam and the red broad-spectrum beam are 0-4.5A and 0-5.5A, respectively; the driving current adjustment ranges of the green narrow-spectrum beam and the green broad-spectrum beam are 0-2.6A and 0-8A, respectively.

[0086] In this embodiment of the invention, to effectively reduce the influence of three-color laser speckle, the proportion of the narrow-spectrum beam in the combined beam (also known as the total energy) can be adjusted, and / or the proportion of the broadband beam in the combined beam can be adjusted. Figure 6 As shown, Figure 6 The effect of the energy ratio of the broadband beam in the combined beam on the speckle pattern of the three-color laser.

[0087] In this embodiment of the invention, adjusting the proportion of narrow-spectrum beams and / or broadband beams in the combined beam can be achieved by adjusting the driving current of the narrow-spectrum beams and / or broadband beams, and the proportion of narrow-spectrum beams and / or broadband beams in the combined beam is positively correlated with the magnitude of the corresponding driving current. Here, the energy proportion of the narrow-spectrum beam can be adjusted by a preset adjustment range of 0-4.5 amperes (A) for the driving current of the red narrow-spectrum beam, and / or by a preset adjustment range of 0-2.6 A for the driving current of the green narrow-spectrum beam. The energy proportion of the broadband beam can be adjusted by a preset adjustment range of 0-5.5 A for the driving current of the red broadband beam, and / or by a preset adjustment range of 0-8 A for the driving current of the green broadband beam.

[0088] In one feasible scenario, continue to refer to Figure 2 It can be seen that a good speckle effect is achieved when the proportion of the broadband beam in the combined beam reaches 40% or more. Therefore, to achieve this proportion, the driving current of the red broadband beam can be set to 5.5A, and the driving current of the red narrow-spectrum beam can be set to 4.5A, reaching 40%. Alternatively, while maintaining the brightness of the combined beam, the driving current of the red broadband beam can be set to 5.5A, and the driving current of the red narrow-spectrum beam can be set to less than 4.5A. In this case, the proportion of the narrow-spectrum beam in the combined beam decreases, while the proportion of the broadband beam increases, reaching over 40%. Thus, by adjusting the energy ratio of the broadband and narrow-spectrum beams, ensuring that the energy proportion of the broadband beam reaches 40% or more, speckle reduction is achieved.

[0089] As described above, by independently adjusting the driving current ratios of the red narrow-spectrum beam (0-4.5A) and the red broad-spectrum beam (0-5.5A), and the green narrow-spectrum beam (0-2.6A) and the green broad-spectrum beam (0-8A), the energy distribution of different spectral components can be dynamically adjusted. When the narrow-spectrum laser dominates, the system provides high brightness and a wide color gamut; increasing the proportion of the broad-spectrum beam allows the low coherence of the broad-spectrum light to effectively disrupt the interference fringes of the laser, significantly suppressing speckle effects and improving image clarity. Furthermore, the differentiated driving current adjustment ranges for different color beams allow the system to precisely control the energy ratio of each color channel according to actual needs; for example, in strong light environments, increasing the current of the red narrow-spectrum beam enhances brightness, while increasing the proportion of the green broad-spectrum beam improves speckle; in dark environments, reducing the overall current maintains color accuracy while reducing speckle interference.

[0090] In some embodiments, the vehicle-mounted lighting device further includes a control unit, wherein...

[0091] A control unit is configured to, when the laser subunit for emitting a narrow-spectrum red beam is activated, control the drive currents of the narrow-spectrum light source and the broadband light source respectively, thereby adjusting the energy ratio between the narrow-spectrum beam and the broadband beam; and / or,

[0092] The control unit is also used to adjust the energy ratio between the narrow-spectrum beam and the broadband beam by periodically switching the narrow-spectrum light source and the broadband light source on and off, thereby controlling the proportion of the high-level duration to the period when the narrow-spectrum light source is turned on or off, which is used to emit a red narrow-spectrum beam.

[0093] In this embodiment of the invention, the control unit can achieve precise control of the energy of different color beams by independently adjusting the driving current of the narrow-spectrum light source and the broadband light source, thereby reducing speckle.

[0094] In this embodiment of the invention, when the narrow-spectrum laser subunit is working, the control unit activates the spectral broadening speckle suppression mechanism by adjusting the energy proportion of the broadband beam. For example, when the red laser subunit is turned on, the proportion of the red broadband beam is increased, thereby reducing speckle contrast and effectively eliminating image flicker. Simultaneously, combined with periodic on / off control, the interference phase of the light is further disrupted by adjusting the proportion of the high-level duration, achieving real-time speckle suppression in dynamic environments and ensuring image clarity and stability during driving.

[0095] In this embodiment of the invention, under different environmental conditions such as temperature and light, the control unit can adjust the energy ratio of narrow-spectrum and wide-spectrum beams in real time. For example, in a high-temperature environment, when the red laser subunit shuts down due to overheating, the control unit automatically increases the current of the red wide-spectrum subunit to maintain the integrity of the image color. In a low-temperature environment, the drive current is quickly adjusted to ensure that the laser subunit quickly reaches the rated brightness, thereby achieving a rapid response to increase brightness in a low-temperature environment and significantly improving the working stability of the vehicle light source in extreme environments.

[0096] In this embodiment of the invention, the control unit constructs a dual-light source redundancy mechanism by switching the light source on and off and regulating its current. When a laser subunit experiences wavelength drift or a fault, the control unit can immediately adjust the driving current of the corresponding broadband light source to compensate for the spectral gap and maintain stable color coordinates. Simultaneously, the periodic on / off control can promptly detect the operating status of the light source, and when an anomaly is detected, it quickly switches to standby mode, improving the overall reliability of the system.

[0097] In some embodiments, if the temperature of the vehicle-mounted light source device is greater than a first temperature, the laser subunit in the narrow-spectrum light source that emits a red narrow-spectrum beam is in a non-operating state, and the broadband subunit in the broadband light source that emits a red broadband beam is in an operating state; if the temperature of the vehicle-mounted light source device is less than or equal to the first temperature, the laser subunit in the narrow-spectrum light source that emits a red narrow-spectrum beam is in an operating state, and the broadband subunit in the broadband light source that emits a red broadband beam is either in an operating state or in a non-operating state.

[0098] The first temperature can be the maximum temperature that the red laser subunit can withstand, and the first temperature can be any value between 65° and 85°.

[0099] Here, if the temperature of the vehicle-mounted light source device exceeds the first temperature, because the temperature of the vehicle-mounted light source device exceeds the maximum temperature that the red laser subunit in the narrow-spectrum light source can withstand, the red laser subunit is in a non-operating state, that is, the red laser subunit does not produce a red narrow-spectrum beam; the green and blue laser subunits in the narrow-spectrum light source can be in an operating state, that is, the green laser subunit normally emits a green narrow-spectrum beam, and the blue laser subunit normally emits a blue narrow-spectrum beam. Additionally, since the vehicle-mounted light source device lacks red light for combining, a red broad-spectrum spectrum can be provided by the red broad-spectrum subunit in the broad-spectrum light source, that is, the red broad-spectrum subunit is in an operating state; of course, the green broad-spectrum subunit in the broad-spectrum light source can be either in an operating state or not. (Refer to...) Figure 7 As shown, the vehicle-mounted light source device adjusts its brightness according to different ambient temperatures, ensuring that the system can operate normally under certain brightness conditions even at an ambient temperature of 65℃.

[0100] Thus, by linking the operating status of the red laser subunit to temperature, equipment damage or performance degradation caused by high temperatures can be effectively avoided. When the temperature of the vehicle-mounted light source exceeds the maximum temperature that the red laser subunit can withstand, the red laser subunit automatically stops working, thereby protecting the equipment from heat damage. Simultaneously, the collaborative working mode of the green / blue laser subunit and the red broadband subunit maintains basic color display even in high-temperature scenarios, preventing color distortion or blackouts due to insufficient red light, ensuring the continuity of driving information display, and effectively suppressing speckle problems in the laser through the broadband beam. Furthermore, the green and blue laser subunits can operate normally at any temperature, and the green broadband subunit in the broadband light source can be selectively activated or deactivated according to actual needs, providing greater configuration flexibility for the system, thereby saving energy or reducing interference.

[0101] Here, if the temperature of the vehicle-mounted light source device is less than or equal to the first temperature, since the temperature of the vehicle-mounted light source device does not exceed the maximum temperature that the red laser subunit in the narrow-spectrum light source can withstand, the red laser subunit in the narrow-spectrum light source is in a working state, that is, the red laser subunit generates a red narrow-spectrum beam; the green and blue laser subunits in the narrow-spectrum light source can also be in a working state, that is, the green laser subunit normally emits a green narrow-spectrum beam, and the blue laser subunit normally emits a blue narrow-spectrum beam. Furthermore, since the vehicle-mounted light source device does not lack any color of light, the red and green broadband subunits in the broadband light source can be in a working state or not working state.

[0102] Thus, since the temperature does not exceed the maximum temperature that the red laser subunit can withstand, the red laser subunit can normally generate a narrow-spectrum red beam, and the green and blue laser subunits can also normally emit their corresponding narrow-spectrum beams, ensuring the integrity of the spectrum and the stability of the system. In addition, when the temperature is low, the red laser subunit can work normally, and the red broadband subunit and green broadband subunit in the broadband light source can be selected to work, thereby effectively suppressing the speckle problem in the laser.

[0103] In some embodiments, continue to refer to Figure 1 As shown, the narrow-spectrum light source 1 faces the first surface D1 of the light combining element 3, and the broadband light source 2 faces the second surface D2 of the light combining element 3;

[0104] The narrow-spectrum light beam incident on the first surface D1 of the light combining element 3 and the broadband light beam incident on the second surface of the light combining element 3 form an angle of 90 degrees.

[0105] The light combining element can be a substrate with double-sided coating. The coating process enables the light combining element to achieve the required transmission and reflection characteristics. The first surface of the light combining element can reflect (or transmit) a narrow-spectrum light beam in the first polarization state of the target wavelength band, and the second surface of the light combining element can transmit (or reflect) a broadband light beam in the second polarization state of the target wavelength band. The angle between the narrow-spectrum light beam incident on the first surface of the light combining element and the broadband light beam incident on the second surface of the light combining element is 90 degrees.

[0106] Thus, the light combining element, through double-sided substrate coating, can independently control beams of different polarization states and spectra. The first surface reflects (or transmits) the narrow-spectrum beam of the first polarization state in the target wavelength band, while the second surface transmits (or reflects) the broadband beam of the second polarization state. This achieves precise separation and efficient synthesis of the narrow-spectrum and broadband beams, improving light energy utilization and effectively reducing energy loss due to spectral interference compared to traditional light combining methods. Furthermore, the angle between the narrow-spectrum and broadband beams incident on the light combining element is designed to be 90 degrees, ensuring that the two beams are spatially perpendicular. This avoids beam overlap and interference, reduces crosstalk in the optical path, minimizes stray light generation, and guarantees the purity of the combined beam, significantly improving the color accuracy and contrast of the automotive display. Finally, by designing the materials and film structure for double-sided coating, the transmission and reflection characteristics of the light combining element can be flexibly customized to adapt to different narrow-spectrum and broadband light source parameters. For example, whether it is adjusting the target wavelength range or changing the processing method for beams with different polarization states, it can be achieved through the coating process, which greatly improves the adaptability of the light combining element to a variety of light source combinations.

[0107] In some embodiments, continue to refer to Figure 1 The first light homogenizing element 4 includes multiple compound eyelets. The incident angles of the combined light beams when they are irradiated by a single compound eyelet from two different preset viewing angles satisfy the following relationship (1):

[0108]

[0109] Wherein, α is the incident angle of the combined light beam when it illuminates a single compound eye in the length direction; β is the incident angle of the combined light beam when it illuminates a single compound eye in the width direction; L is the length of a single compound eye; W is the width of a single compound eye; and D is the thickness of the first light homogenizing element.

[0110] Thus, the first light homogenizing element adopts a compound eye sub-eye structure, combined with a specific incident angle constraint condition, namely the above formula (1), to ensure that the combined light beam achieves a highly uniform distribution of brightness and energy after refraction and superposition through multiple sub-eyes. By limiting the light beams incident from different directions to a specific angle range, energy loss caused by beam cross-interference can be effectively avoided, and the uniformity of the output beam can be improved, thereby significantly improving the brightness consistency of the in-vehicle display screen. In addition, this design avoids edge light overflow or reflection loss caused by excessive beam incident angle. When tanα and tanβ meet the requirements of the above formula (1), the beam can fully cover the compound eye sub-eye area, reduce ineffective scattering and refraction, and improve light energy utilization. Especially in the scenario where in-vehicle space is limited and light source energy is precious, this optimization can reduce system power consumption and extend the life of the light source. Finally, based on the quantitative constraints of the compound eye sub-eye size L, W and the component thickness D, the beam propagation path and diffusion degree can be precisely controlled. For example, by adjusting the D value, the beam convergence or divergence effect can be changed, so that the system can adapt to the beam size and angle requirements of different vehicle display devices, ensuring that the light is accurately projected onto the target area and avoiding dark corners or uneven brightness in the picture.

[0111] In some embodiments, refer to Figure 8 As shown, the first light homogenizing element 4 includes a first compound eye element 41 located in a first region and a second compound eye element 42 located in a second region. The first compound eye element 41 is embedded within the second compound eye element 42. The materials of the first compound eye element 41 and the second compound eye element 42 are at least different.

[0112] The first compound eye element 41 is used for transmitting and homogenizing narrow-spectrum beams, or narrow-spectrum beams and broadband beams.

[0113] The second compound eye element 42 is used for transmitting and homogenizing broadband light beams.

[0114] The first light homogenizing element can be an integrated glass-plastic compound eye element. It can include a first compound eye element in a first region and a second compound eye element in a second region. The first compound eye element can be nested within the second compound eye element. Here, the first compound eye element can be a glass compound eye, and the second compound eye element can be a plastic compound eye. It should be noted that the size of the first region can be determined based on the spot size of the narrow-spectrum beam irradiating the first light homogenizing element, and the size of the second region can be determined based on the spot size of the broadband beam irradiating the first light homogenizing element. However, this invention does not impose specific requirements on these aspects.

[0115] In one feasible approach, for both narrow-spectrum and broadband beams irradiating the first optical homogenizing element, since the narrow-spectrum beam has a smaller spot size, a smaller area of ​​glass compound eye can be nested within a plastic compound eye. The plastic compound eye in the outer region can homogenize only the broadband beam passing through, while the glass compound eye in the middle region can homogenize the narrow-spectrum beam, or both the narrow-spectrum beam and a portion of the broadband beam. Thus, the outer region of the first optical homogenizing element uses a low-cost plastic compound eye, while the middle region uses a glass compound eye. The high-precision optical performance of the glass compound eye ensures the homogenization effect of the narrow-spectrum beam, while the plastic compound eye meets the basic homogenization requirements of the broadband beam, maximizing cost-effectiveness. Furthermore, the high transmittance and low dispersion characteristics of the glass compound eye effectively avoid interference fringes and speckle effects of the laser, improving spot uniformity; the plastic compound eye rapidly diffuses broadband light through its large-size sub-eye structure, utilizing its flexibility to compensate for optical path deviation caused by thermal expansion and contraction, maintaining high homogenization efficiency even in high-temperature environments.

[0116] In some embodiments, with Figure 1 Taking the left image as an example, refer to Figure 9 As shown, the vehicle-mounted light source device 100 also includes at least one lens element 71, 72, and 73, a prism 8, a light valve 9, and an imaging assembly 10, wherein,

[0117] Lens elements are used to collimate and shape received light beams;

[0118] Prism 8 is used to guide the light beam emitted from the first light homogenizing element through total internal reflection to the light valve, and to transmit the light emitted from the light valve.

[0119] Optical valve 9 is used to receive and adjust the light beam emitted from the prism and to emit image light to the imaging assembly;

[0120] Imaging component 10 is used to display vehicle-mounted projected images by transmitting image light.

[0121] Lens elements can shape the light beam, such as by expanding, contracting, and / or reshaping it. This allows the beam to better match the size of subsequent optical components, preventing underutilization of the effective area of ​​the optical components due to an excessively small beam size, thereby improving the performance of the entire optical system. Furthermore, lens elements can shape multiple beams, adjusting unevenly distributed beams to a more uniform distribution to meet the uniformity requirements of different applications. They can also collimate, contract, or expand multiple beams, transforming them into near-collimated parallel beams that conform to the incident light homogenizing element, improving the laser's directionality and enabling it to maintain high intensity and stability over long distances. Here, the lens element can be a shaping lens and / or a collimating lens, such as a spherical or aspherical lens.

[0122] Among them, the prism can utilize the difference in refractive index of different wavelengths of light in the prism material to decompose the composite light into a continuous spectrum. The prism includes, but is not limited to, a single prism, a total internal reflection prism (TIR), and a reverse total internal reflection prism (RTIR). The structure of the prism can be selected according to the space.

[0123] In one possible implementation, the prism includes at least a first surface, a second surface, and a third surface. The first and second surfaces are used to guide the received combined beam through a light valve after full transmission. The second surface is also used to transmit the beam processed by the light valve. The first surface is also used to reflect the beam processed by the light valve. The light valve is located outside the second surface. The third surface is used to transmit the beam processed by the light valve.

[0124] A light valve is an optical device that controls the transmission of light and modulates its characteristics (such as intensity, phase, and polarization). For example, a light valve can be a reflective light modulator such as a Liquid Crystal On Silicon panel (LCoSpanel), a Liquid Crystal Display (LCD), or a Digital Micromirror Device (DMD). Here, we will use a DMD as an example. A DMD can be composed of many tiny mirrors, each corresponding to a pixel in an image. By controlling the flipping state of the micromirrors, the direction of light reflection can be precisely controlled, thereby converting the input electrical signal into an optical image. In the optical system, the DMD quickly adjusts the angle of the micromirrors based on the received signal, combining the red, green, and blue primary colors of light into a color image and projecting it onto the screen. Of course, the DMD can quickly switch the state of the micromirrors to achieve high-contrast image display. When black needs to be displayed, the micromirrors reflect light to a specific location, where black ink, coating, or chrome plating is applied to reduce light reflection and leakage, thereby improving contrast. At the same time, by properly controlling the opening time and angle of the micromirrors, the energy of the light source can be effectively utilized to improve the brightness of the image.

[0125] In one feasible approach, continue to refer to Figure 9The narrow-spectrum beam emitted from narrow-spectrum light source 1 and the broadband beam emitted from broadband light source 2 are combined by beam combining element 3. The combined beam is then collimated and shaped by lens element 71, and homogenized by the first light homogenizing element. After collimation and optical path refraction by lens elements 72 and 73, the combined beam enters prism 8. It is then fully transmitted through the first and second surfaces of the prism to light valve 9. Light valve 9 processes the combined beam, which then reaches the second surface of prism 8. The beam is then transmitted through light valve 9 to the first surface of prism 8, undergoes total internal reflection, and is transmitted through the third surface of prism 8 before exiting to imaging assembly 10. In this way, the beam combining element integrates narrow-spectrum and broadband beams, and the collimation, shaping, and homogenization by the lens improve beam uniformity and collimation, laying a high-quality light foundation for subsequent processing. The prism utilizes its total transparency and total reflection characteristics to complete beam refraction and bidirectional interaction with the light valve within a compact space, eliminating the need for additional switching elements, simplifying the optical path, reducing system size, and improving light transmission efficiency. After processing by the light valve, the light is precisely controlled by the prism to ensure that the imaging component receives light with excellent parallelism and uniformity, guaranteeing image clarity and color reproduction. This makes it suitable for scenarios such as spectral imaging and projection display, achieving multispectral beam modulation and efficient imaging closed loop.

[0126] The following describes the implementation process of this utility model embodiment in an applicable application scenario.

[0127] In projection display products, the mainstream light sources currently include LEDs, blue LD-excited phosphors, and tri-color LDs. As people's demands for brightness, color, and contrast increase, tri-color LD technology is gradually becoming the mainstream choice. However, tri-color LD technology also has inherent drawbacks, such as speckle and color fringing effects, which can significantly detract from the viewing experience, especially in automotive display systems where its performance directly affects the visual experience of drivers and passengers.

[0128] To address the aforementioned technical problems, this utility model provides an in-vehicle optical architecture for high-efficiency laser mixing (corresponding to the aforementioned in-vehicle light source device). While leveraging the advantages of tri-color lasers, the addition of an appropriate proportion of LEDs significantly reduces laser speckle and chromatic aberration effects. Furthermore, the inclusion of red and green LEDs in the LD enables full-spectrum visible light display, resulting in more realistic and richer colors, and is also more eye-friendly.

[0129] Example 1

[0130] Reference Figure 10As shown, the vehicle-mounted optical architecture includes an LD light source 901, an LED light source 902 (including LED-R light source 9021 and LED-G light source 9022), a reflective element 903, beam splitting elements 904 and 905, a phase improvement element 906 (corresponding to the polarization conversion element mentioned above), a dissipation element 907, a light combining compound eye element 908, multiple lenses 909, 910, 911, 912, 913 and 914, a light combining element 915, an illumination compound eye element 916, a prism 917, a light valve 918, and an imaging lens 919. The LD light source 901 is used to generate P-state LD light and can be an RGB-mix LD light source.

[0131] LED light source 902 is used to generate natural light.

[0132] Beam splitter 904 transmits red LED light and reflects green and blue LED light; beam splitter 905 transmits green and blue LED light and reflects red LED light.

[0133] The phase improvement element 906 can be a half-wave plate or a depolarizer, which can perform polarization state conversion on red and blue LD light.

[0134] The dissipation element 907 can be a static diffuser or a dynamic diffuser. By dynamically displacing the diffuser, the effect of dissipating and homogenizing the light spot can be achieved.

[0135] The 908 compound eye element is used to homogenize and dissipate LD light. It can be a reserved element, not a necessary element.

[0136] Lenses 909, 910, 911 and 912 are used to collimate the beam, and lenses 913 and 914 are used to focus the beam.

[0137] The light-combining element 915 transmits P-state LD light and reflects S-state LED light.

[0138] The 916 illumination compound eye element is used to homogenize LD light and LED light.

[0139] Prism 917 is used to guide the received light beam through total internal reflection to the light valve DMD and transmit the light emitted from the DMD.

[0140] The light valve 918 is used to receive and adjust the light beam emitted through the prism.

[0141] Imaging lens 919 is used to display the image.

[0142] In one feasible approach, a three-color LD and R&G_LED light mixing scheme is employed. The three-color LD module is compatible with two packaging methods to adapt to projection systems with different brightness requirements, such as... Figure 3As shown. Typically, to effectively reduce laser speckle effect, the brightness ratio of LED to LD needs to be ≥50%.

[0143] Here, this invention effectively reduces the influence of speckle from the three-color laser by adjusting the ratio of LEDs and LDs, such as... Figure 6 As shown; the current adjustment schemes for R_LD and R_LED are 0-4.5A and 0-5.5A respectively, and the current adjustment schemes for G_LD and G_LED are 0-2.6A and 0-8A respectively.

[0144] Here, since LED light is natural light, if the wavelength of the LD light is 540 nm, the P-state and S-state light are separated, ensuring that the P-state light can pass through. Taking green as an example, refer to... Figure 4 As shown, green LD transmission requires that the green LED light be reflective. At least the S-state LED light can still be reflected between 540-560. In order to make the S-state LED light reflect as much as possible, the LD laser spectrum should be shifted to shorter wavelengths as much as possible. This increases the reflectivity of the S-state LED light and reduces the light combining loss.

[0145] Example 2

[0146] Reference Figure 11 As shown, the positions of the LD light source 901 and the LED light source 902 can be interchanged to adapt to different space requirements.

[0147] Example 3

[0148] LD light sources can also be integrated light sources. The automotive optical architecture can be a single-prism architecture or a TIR prism architecture, as shown in the reference. Figure 12 and Figure 13 As shown. Of course, it can also be an RTIR architecture. The choice of prism architecture can be made based on space requirements.

[0149] Example 4

[0150] The 915 lighting compound eye element can be a glass-plastic integrated compound eye, selected based on light density and usage conditions. When the laser's optical power density exceeds a certain value, the laser-passing part must be glass; in this case, a glass-plastic integrated compound eye can be used to reduce costs, such as... Figure 8 As shown, the principle of integrated glass-plastic compound eyes is to nest small glass compound eyes within plastic compound eyes. The outer plastic compound eyes only transmit light from LEDs, while the laser light mostly passes through the glass compound eyes. This effectively reduces the cost of glass compound eyes.

[0151] Among them, the area of ​​the illumination compound eye element should be slightly larger than the laser spot, such that the area of ​​the laser spot does not exceed 90% of the area of ​​the glass compound eye.

[0152] The illumination compound eye element comprises n sub-compound eyes. The thickness of the illumination compound eye element is D, the length of a single sub-compound eye (cell) is L, and the width of a single cell is W. Then, the incident angle α of the laser in the length direction and the incident angle β of the short side satisfy the following relationship:

[0153] tanα≤L / (2*D,tanβ≤W / (2*D)

[0154] In this way, when the light hits the light valve chip, the light emitted by each cell can cover the same area of ​​the light valve chip. The superposition of the light intensity of n cells is equivalent to a homogenization effect. The light intensity is different in front of the compound eye, but after the light intensity of the n cells in the compound eye is superimposed, the light intensity is more uniform.

[0155] Example 5

[0156] When this invention is applied to the field of automotive displays, due to the wide ambient temperature range, the system adjusts its brightness according to different ambient temperatures, ensuring that the system can operate normally under certain brightness conditions even at an ambient temperature of 65℃. Figure 7 As shown.

[0157] For example, when the vehicle temperature exceeds 65 degrees Celsius, after the R-LD light source is turned off, a new image needs to be used to adjust the white balance and redistribute the duty cycle. With the red LD off, the fan speed can be increased to minimize brightness loss, as noise specifications can be relaxed at high temperatures. This provides a solution for situations where the red LD light source is unusable at high temperatures, ensuring that the vehicle projection system can still operate at a certain brightness level even under high temperatures.

[0158] Example 6

[0159] This utility model solution is compatible with the mixing of different types of lasers and LEDs. The first method uses an RGB-mix laser combined with R-LEDs and G-LEDs, such as... Figure 10 and Figure 11 As shown; the second method uses a combination of RGB separate LD light sources and R_LED and G_LED, such as... Figure 14 As shown, it also includes a beam splitter 920, which transmits blue LD light and reflects green LD light; the third type uses a scheme that mixes RGB tri-color LEDs with R_LD and G_LD, such as... Figure 15 As shown, the LED light source includes an LED-B light source 9023, a lens element 921, and a beam splitter 921. The beam splitter 921 transmits blue light and reflects green light. These different combinations of solutions are designed to meet different customer needs.

[0160] This utility model embodiment also provides a vehicle-mounted projection device, see reference. Figure 16 As shown, the vehicle-mounted projection device includes an image processor 161 and a projection optical engine 162. Wherein:

[0161] The image processor 161 can be a microcontroller, a dedicated image processing chip, etc. The microcontroller can be an ARM chip, a microcontroller unit (MCU), etc.; the dedicated image processing chip can be an image signal processor (ISP), a graphics processing unit (GPU), an embedded neural network processing unit (NPU), etc. The image processor 161 can be used for video decoding, image quality processing, etc.

[0162] The projection optical engine 162 may include a driver chip, a spatial light modulator, and the vehicle-mounted light source device 100 described in the above embodiments. The spatial light modulator may be a digital micromirror device (DMD), a liquid crystal display (LCD), or a liquid crystal on silicon (LCOS), etc. The driver chip corresponds to the spatial light modulator; for example, the digital micromirror device may be driven by a digital light processing (DLP) element. The projection optical engine 162 is used to project the image to be projected into a projected image.

[0163] In some embodiments, the vehicle-mounted projection device further includes a central controller 163 with one or more processing cores. This central controller can be a CPU, ARM, MCU, or other controller. The central controller 163 is the control center of the vehicle-mounted projection device, connecting various parts of the device via various interfaces and lines. It can run or execute software programs and / or operating systems stored in the memory 164, and access data stored in the memory 164. Optionally, the image processor 161 and the central controller 163 can be integrated into a single processor.

[0164] In some embodiments, the vehicle-mounted projection device further includes a memory 164, an input module 165, a communication module 166, a power supply 167, and other components of one or more computer-readable storage media. Those skilled in the art will understand that... Figure 16The structure of the vehicle-mounted projection device shown does not constitute a limitation on the vehicle-mounted projection device. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0165] The memory 164 can be used to store software programs and operating systems. The central controller 163 executes various functional applications and data processing by running the software programs and operating systems stored in the memory 164. The memory 164 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created based on the use of the in-vehicle projection device, etc. In addition, the memory 164 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 164 may also include a memory controller to provide the central controller 163 with access to the memory 164.

[0166] The vehicle-mounted projection device may also include an input module 165, which can be used to receive input digital or character information, and generate remote control, keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0167] The vehicle-mounted projection device may also include a communication module 166. In some embodiments, the communication module 166 may include a wireless module, through which the vehicle-mounted projection device can perform short-range wireless transmission, thereby providing users with wireless broadband internet access. For example, the communication module 166 can be used to help users access streaming media.

[0168] The vehicle-mounted projection device also includes a power supply 167 that supplies power to the various components. In some embodiments, the power supply 167 can be logically connected to the central controller 163 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 167 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0169] It should be understood that the terms "an embodiment," "an embodiment," "an embodiment of the present invention," "the foregoing embodiment," "some embodiments," or "some implementations" mentioned throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an embodiment," "an embodiment of the present invention," "the foregoing embodiment," "some embodiments," or "some implementations" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of the present invention, the sequence number of the above-described processes does not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The above-described embodiment numbers are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0170] In the several embodiments provided by this utility model, it should be understood that the disclosed device can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0171] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0172] In addition, in the various embodiments of this utility model, all functional units can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0173] It is worth noting that the accompanying drawings in this utility model embodiment are only for illustrating the schematic positions of various devices on the device and do not represent their actual positions in the device. The actual positions of each device or area may be changed or shifted according to the actual situation (e.g., the structure of the device). Furthermore, the proportions of different parts of the device in the drawings do not represent the actual proportions.

[0174] The above description is merely an embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A vehicle-mounted light source device, characterized in that, include: Narrow-spectrum light source, broadband light source, light combining element, and first light homogenizing element; among which, The narrow-spectrum light source is used to emit narrow-spectrum light beams of at least two different colors. The narrow-spectrum light source includes laser sub-units of at least two different colors. The polarization state of the light emitted by the laser sub-units of at least two different colors is a first polarization state. The first laser sub-units of at least two different colors are integrated and packaged in a single structure in a single-row arrangement to form a first mixed-color component. Alternatively, the laser sub-units of at least two different colors are integrated and packaged in two separate structures in a double-row arrangement to form a second mixed-color component and a single-color component. The broadband light source is used to emit broadband light beams of at least two different colors, and the polarization state of the light generated by the broadband light source includes the first polarization state and the second polarization state. The beam combining element is used to combine the narrow-spectrum beam emitted from the narrow-spectrum light source and / or the broadband beam emitted from the broadband light source. The beam combining element transmits light with a wavelength in a first polarization state within the target wavelength band and reflects light with a wavelength in a second polarization state within the target wavelength band; or, it reflects light with a wavelength in a first polarization state within the target wavelength band and transmits light with a wavelength in a second polarization state within the target wavelength band. The target wavelength band includes at least a portion of the spectral band of the broadband light source, and the portion of the spectral band includes at least the spectral band of the first laser subunit. The beam color corresponding to the portion of the spectral band is the same as that of the spectral band of the first laser subunit. The first light homogenizing element is used to homogenize the combined light beam emitted from the light combining element; wherein, the area of ​​the incident surface of the first light homogenizing element is larger than the area of ​​the light spot on the incident surface of the combined light beam.

2. The apparatus according to claim 1, characterized in that, The difference between the left endpoint of a range of the target band and the left endpoint of the spectral band of the first laser subunit is less than 15 nanometers.

3. The apparatus according to claim 1, characterized in that, The narrow-spectrum beam includes a red narrow-spectrum beam, a green narrow-spectrum beam, and a blue narrow-spectrum beam; the broad-spectrum beam includes a red broad-spectrum beam and a green broad-spectrum beam, with the driving current adjustment ranges of the red narrow-spectrum beam and the red broad-spectrum beam being 0-4.5A and 0-5.5A, respectively; the driving current adjustment ranges of the green narrow-spectrum beam and the green broad-spectrum beam are 0-2.6A and 0-8A, respectively.

4. The apparatus according to claim 1, characterized in that, If the temperature of the vehicle-mounted light source device is greater than the first temperature, the laser subunit in the narrow-spectrum light source that emits the red narrow-spectrum beam is in a non-operating state, and the broadband subunit in the broadband light source that emits the red broadband beam is in an operating state; if the temperature of the vehicle-mounted light source device is less than or equal to the first temperature, the laser subunit in the narrow-spectrum light source that emits the red narrow-spectrum beam is in an operating state, and the broadband subunit in the broadband light source that emits the red broadband beam is either in an operating state or in a non-operating state.

5. The apparatus according to claim 1, characterized in that, The narrow-spectrum light source faces the first surface of the light combining element, and the broadband light source faces the second surface of the light combining element; The narrow-spectrum light beam incident on the first surface of the light combining element and the broadband light beam incident on the second surface of the light combining element form an angle of 90 degrees.

6. The apparatus according to claim 1, characterized in that, The first light homogenizing element includes multiple compound eyelets. The incident angles of the combined light beam when it is incident on a single compound eyelet from two different preset viewing angles satisfy the following relationship: Wherein, α is the incident angle of the combined light beam when it illuminates the single compound eye in the length direction; β is the incident angle of the combined light beam when it illuminates the single compound eye in the width direction; L is the length of the single compound eye; W is the width of the single compound eye; and D is the thickness of the first light homogenizing element.

7. The apparatus according to claim 1, characterized in that, The first light homogenizing element includes a first compound eye element located in a first region and a second compound eye element located in a second region. The first compound eye element is embedded within the second compound eye element. The materials of the first compound eye element and the second compound eye element are at least different. The first compound eye element is used to transmit and homogenize the narrow-spectrum light beam, or the narrow-spectrum light beam and the broadband light beam; The second compound eye element is used to transmit and homogenize the broadband beam.

8. A vehicle-mounted projection device, characterized in that, The vehicle-mounted projection device includes the vehicle-mounted light source device as described in any one of claims 1 to 7.

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