CN216848388U - Head-up display device - Google Patents
Head-up display device Download PDFInfo
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- CN216848388U CN216848388U CN202090000841.1U CN202090000841U CN216848388U CN 216848388 U CN216848388 U CN 216848388U CN 202090000841 U CN202090000841 U CN 202090000841U CN 216848388 U CN216848388 U CN 216848388U
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- 239000000853 adhesive Substances 0.000 claims description 54
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- 238000009792 diffusion process Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 24
- 238000005286 illumination Methods 0.000 abstract description 72
- 230000004048 modification Effects 0.000 description 21
- 238000012986 modification Methods 0.000 description 21
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- 239000004925 Acrylic resin Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
- B60K35/23—Head-up displays [HUD]
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/20—Optical features of instruments
- B60K2360/23—Optical features of instruments using reflectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/20—Optical features of instruments
- B60K2360/25—Optical features of instruments using filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/20—Optical features of instruments
- B60K2360/33—Illumination features
- B60K2360/331—Electroluminescent elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/20—Optical features of instruments
- B60K2360/33—Illumination features
- B60K2360/343—Illumination of matrix displays
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Instrument Panels (AREA)
Abstract
The utility model provides a can restrain LCD's head up display device that the temperature rises. A head-up display device is provided with: a light source; a liquid crystal display (1) that emits display light (L) representing an image on the basis of illumination light (C1) from a light source; and a reflection-type polarization member (4a) which is positioned between the light source and the liquid crystal display (1) in the optical path of the illumination light (C1) from the light source, reflects a component along the reflection axis in the incident illumination light (C1) from the light source in a direction different from that of the liquid crystal display (1), and transmits a component along the transmission axis intersecting the reflection axis to the liquid crystal display (1). The liquid crystal display (1) is provided with an absorption-type polarizing member (1e) which is provided at a position closer to the light source than a liquid crystal section (1a) of the liquid crystal display (1), absorbs a component along the absorption axis in incident light, and transmits a component along a transmission axis intersecting the absorption axis. The reflection-type polarizing member (4a) is provided in the direction in which the reflection axis of the reflection-type polarizing member (4a) is along the absorption axis of the absorption-type polarizing member (1 e).
Description
Technical Field
The utility model relates to a head-up display device.
Background
The head-up display device described in patent document 1 receives light from the backlight unit, causes the liquid crystal display element to emit display light representing an image to the transparent member, and displays a virtual image of the image by the display light reflected by the transparent member. This liquid crystal display element is configured by providing polarizing plates on the front surface side and the back surface side of a TFT (Thin Film Transistor) type liquid crystal panel, for example.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2015-82104
In the structure of patent document 1 described above, the polarizing plate on the back surface side of the liquid crystal display element close to the backlight unit absorbs a component along the absorption axis of the polarizing plate in the light from the backlight unit. Therefore, the temperature of the polarizing plate and, in turn, the liquid crystal display element may be increased.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a head-up display device capable of suppressing a temperature rise of a liquid crystal display.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a head-up display device comprising: a light source; a liquid crystal display that emits display light representing an image based on the light from the light source; and a reflection-type polarization member that is positioned between the light source and the liquid crystal display in an optical path of light from the light source, reflects a component along a reflection axis in the incident light from the light source in a direction different from the liquid crystal display, and transmits a component along a first transmission axis intersecting the reflection axis to the liquid crystal display, the liquid crystal display including an absorption-type polarization member that is provided at a position closer to the light source than a liquid crystal portion of the liquid crystal display, absorbs a component along an absorption axis in the incident light, and transmits a component along a second transmission axis intersecting the absorption axis, the reflection-type polarization member being provided in: the reflection axis of the reflective polarizing member is along the absorption axis of the absorptive polarizing member.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a head-up display device comprising: a light source; a liquid crystal display that emits display light representing an image based on the light from the light source; and a reflection-type polarization member that is located between the light source and the liquid crystal display in an optical path of light from the light source, reflects a component along a reflection axis in the incident light from the light source toward the liquid crystal display, and transmits a component along a first transmission axis intersecting the reflection axis in a direction different from that of the liquid crystal display, the liquid crystal display including an absorption-type polarization member that is provided at a position closer to the light source than a liquid crystal portion of the liquid crystal display, absorbs a component along an absorption axis in the incident light, and transmits a component along a second transmission axis intersecting the absorption axis, the reflection-type polarization member being provided in: the first transmission axis of the reflective polarizing member is along the absorption axis of the absorptive polarizing member.
In order to achieve the above object, according to a third aspect of the present invention, there is provided a head-up display device comprising: a light source; a liquid crystal display that emits display light representing an image based on the light from the light source; an optical adjustment unit that is positioned between the light source and the liquid crystal display in an optical path of light from the light source, and adjusts the light from the light source; a light diffusion member that is positioned between the light adjustment section and the liquid crystal display in an optical path of the light from the light source, and diffuses the light that has passed through the light adjustment section; and a reflection-type polarization member that is located between the light source and the light diffusion member in an optical path of light from the light source, reflects a component along a reflection axis in the incident light from the light source in a direction different from the liquid crystal display, and transmits a component along a first transmission axis intersecting the reflection axis to the liquid crystal display, the liquid crystal display including an absorption-type polarization member that is provided at a position closer to the light source than a liquid crystal portion of the liquid crystal display, absorbs a component along an absorption axis in the incident light, and transmits a component along a second transmission axis intersecting the absorption axis, the reflection-type polarization member being provided in: the reflection axis of the reflective polarizing member is along the absorption axis of the absorptive polarizing member.
Effect of utility model
According to the utility model discloses, in head up display device, can restrain LCD's temperature rise.
Drawings
Fig. 1 is a schematic view of a head-up display device according to a first embodiment of the present invention.
Fig. 2 is a cross-sectional view of a liquid crystal display, a transmissive member, and a reflective polarizing member according to a first embodiment of the present invention.
Fig. 3 is a schematic view of a lighting device according to a first embodiment of the present invention.
Fig. 4 is a schematic view showing illumination light passing through a reflection type polarization member and a polarization member of a liquid crystal display according to a first embodiment of the present invention.
Fig. 5 is a schematic view of a liquid crystal display and an illumination device according to a second embodiment of the present invention.
Fig. 6 is a schematic view of a liquid crystal display according to a modification of the present invention.
Fig. 7 is a schematic view of a liquid crystal display and an illumination device according to a modification of the present invention.
Fig. 8 is a schematic view of a lighting device according to a modification of the present invention.
Fig. 9 is a schematic view of an illumination device according to a modification of the present invention.
Fig. 10 is a schematic view of a liquid crystal display and an illumination device according to a modification of the present invention.
Fig. 11 is a schematic view showing illumination light passing through a reflection-type polarizing member and a polarizing member of a liquid crystal display according to a modification of the present invention.
Description of the symbols
1 liquid crystal display
1a liquid crystal part
1b, 1c transparent substrate
1d, 1e absorption type polarizing member
2 adhesive Material
3 permeable Member
4a reflection type polarizing member
4b adhesive material
5 Lighting device
5a light source
5b light source substrate
5c first lens (an example of an optical adjusting part)
5d second lens (an example of an optical adjusting part)
5e light diffusion member
5f lighting device box
5g opening
6 second reflector
7 first reflector
8 casing
8a opening part
9 see-through window member
10 head-up display device
11 permeable member
12a reflection type polarizing member
12b permeable substrate
12c adhesive material
50 windshield
A1 through shaft
A2 absorption shaft
B1 through the shaft
B2 reflection axis
C1, C2, C3, Ca and Cb illuminating light
C4 reflects light
C5 diffused light (diffused light)
Cc transmitted light
D1 through the shaft
D2 reflection axis
L display light
Detailed Description
(first embodiment)
A first embodiment of a head-up display device according to the present invention will be described with reference to the drawings. The utility model discloses a head-up display device carries on the vehicle, shows the virtual image that contains vehicle information through projecting the demonstration light on the windshield.
As shown in fig. 1, the head-up display device 10 includes a first reflecting mirror 7, a second reflecting mirror 6, a case 8, a liquid crystal display 1, an adhesive material 2, a transmissive member 3, a reflective polarization member 4a, an adhesive material 4b, an illumination device 5, and a transmissive window member 9.
The illumination device 5 emits illumination light C1 as unpolarized light to the liquid crystal display 1.
As shown in fig. 3, the illumination device 5 includes a plurality of light sources 5a, a light source substrate 5b, a first lens 5c, a second lens 5d, a light diffusion member 5e, and an illumination device case 5 f.
The lighting device case 5f is formed of light-shielding resin or metal into a box shape having an opening 5 g. In the lighting device case 5f, a plurality of light sources 5a, a light source substrate 5b, a first lens 5c, and a second lens 5d are accommodated.
A plurality of light sources 5a are provided on a surface of the light source substrate 5b facing the first lens 5 c. Each Light source 5a is formed of an LED (Light Emitting Diode). Each light source 5a emits illumination light C1 upward toward the first lens 5C and the second lens 5 d.
The first lens 5C and the second lens 5d are lens groups for adjusting the illumination light C1 from each light source 5a in accordance with the liquid crystal display 1.
The first lens 5C is positioned between the plurality of light sources 5a and the second lens 5d, and is composed of a condenser lens for parallelizing the illumination light C1 from the plurality of light sources 5 a.
The second lens 5d diffuses or condenses the illumination light C1 transmitted through the first lens 5C in correspondence with the light diffusion member 5e and further the liquid crystal display 1 (see fig. 1). The first lens 5c and the second lens 5d are held in the lighting device case 5f by lens holding members, not shown.
The light diffusion member 5e is located on the opposite side of the second lens 5d from the first lens 5 c. The light diffusion member 5e is positioned to block the opening 5g of the lighting device case 5 f. The light diffusion member 5e diffuses the illumination light C1 transmitted through the second lens 5d into a surface light source, and emits the diffused illumination light C1 to the liquid crystal display 1 and the reflection-type polarization member 4 a. The light diffusion member 5e is formed by, for example, superposing a light diffusion sheet on a transparent resin plate. On the light diffusion sheet, fine irregularities for diffusing light are formed.
As shown in fig. 1, the liquid crystal display 1 receives illumination light C1 from the illumination device 5 and emits display light L representing an image. The liquid crystal display 1 is, for example, a TFT (Thin Film Transistor) type liquid crystal display panel.
The first reflecting mirror 7 reflects the display light L from the liquid crystal display 1 toward the second reflecting mirror 6. The first reflecting mirror 7 is, for example, a plane mirror or a concave mirror. The first mirror 7 is directed towards the middle between the liquid crystal display 1 and the second mirror 6.
The second reflecting mirror 6 reflects the display light L from the first reflecting mirror 7 toward the windshield 50, which is an example of a projected member. The second mirror 6 is, for example, a concave mirror. The second reflecting mirror 6 faces the irradiation position of the display light L in the windshield 50 and the intermediate position of the first reflecting mirror 7. The windshield 50 reflects the display light L from the second reflecting mirror 6 toward a viewer, such as a driver. Accordingly, a virtual image including vehicle information can be visually displayed on windshield 50 from a viewer.
As shown in fig. 1, the case 8 is formed in a box shape from light-shielding resin or metal. In the case 8, the first reflecting mirror 7, the second reflecting mirror 6, the illumination device 5, the liquid crystal display 1, the adhesive materials 2 and 4b, the transmissive member 3, and the reflective polarization member 4a are accommodated. An opening 8a is formed in the case 8 at a position vertically opposite to the windshield 50. The transmissive window member 9 is formed in a curved plate shape from a light-transmissive resin or glass that transmits the display light L. The transmission window member 9 is fixed to the case 8 so as to close the opening 8a of the case 8.
As shown in fig. 2, the liquid crystal display 1 includes a liquid crystal section 1a, transparent substrates 1b and 1c, and absorption-type polarizers 1d and 1 e. The liquid crystal display 1 is configured by stacking an absorption-type polarizing member 1d, a transparent substrate 1b, a liquid crystal unit 1a, a transparent substrate 1c, and an absorption-type polarizing member 1e in this order from a position close to the first mirror 7.
The liquid crystal section 1a may be of any of TN (Twisted Nematic) system, VA (Vertical Alignment) system, and IPS (In Plane Switching) system. For example, the liquid crystal portion 1a includes a liquid crystal having a plurality of liquid crystal molecules, an alignment film that defines an alignment direction of the liquid crystal molecules, and a transparent electrode that controls alignment of the liquid crystal molecules by switching between a state of energization and a state of non-energization, which are not shown in the drawings. The liquid crystal section 1a is sandwiched between a pair of transparent substrates 1b and 1 c. The transparent substrates 1b and 1c are each formed of glass in a plate shape. The transparent substrate 1b is provided on the surface of the liquid crystal section 1a close to the first reflecting mirror 7. The transparent substrate 1c is provided on the back surface of the liquid crystal section 1a near the illumination device 5.
The absorption-type polarizers 1d, 1e sandwich the transparent substrates 1b, 1c from the thickness direction of the liquid crystal section 1 a. The absorption-type polarizing member 1d is provided on the surface of the transparent substrate 1b near the first reflecting mirror 7. The absorption-type polarizing member 1e is provided on the back surface of the liquid crystal section 1a near the illumination device 5. The absorption polarizing members 1d and 1e are, for example, absorption polarizing films that absorb a component along the absorption axis of incident light and transmit a component along the transmission axis.
As shown in fig. 2 and 4, the absorption-type polarizing member 1e includes a transmission axis a1 and an absorption axis a2 that are orthogonal to each other. The absorption-type polarizing member 1e absorbs a component of light along the absorption axis a2 in the incident light and transmits a component of light along the transmission axis a 1. The absorption-type polarizing member 1d has the same function as the absorption-type polarizing member 1 e.
When the liquid crystal unit 1a is of the TN type, the absorption axis of the absorption-type polarizer 1d and the absorption axis a2 of the absorption-type polarizer 1e are orthogonal to each other, and the absorption-type polarizers 1d and 1e are provided in directions in which the transmission axis of the absorption-type polarizer 1d and the transmission axis a1 of the absorption-type polarizer 1e are orthogonal to each other. When the liquid crystal unit 1a is of the VA system or the IPS system, the absorption polarizing members 1d and 1e are provided in a direction in which the absorption axis of the absorption polarizing member 1d and the absorption axis a2 of the absorption polarizing member 1e are parallel to each other and the transmission axis of the absorption polarizing member 1d and the transmission axis a1 of the absorption polarizing member 1e are parallel to each other.
As shown in fig. 2, an adhesive 2, a transmissive member 3, an adhesive 4b, and a reflective polarizing member 4a are laminated on the rear surface of the liquid crystal display 1 near the illumination device 5.
The adhesive 4b is positioned between the reflective polarizing member 4a and the transmissive member 3, and bonds the reflective polarizing member 4a to the back surface of the transmissive member 3. The adhesive 4b is formed of, for example, a light-transmitting adhesive. The adhesive material 4b is, for example, a colorless and transparent translucent adhesive material made of a silicone resin or an acrylic resin.
The reflective polarizing member 4a is provided on the back surface side of the liquid crystal display 1 near the illumination device 5. The reflection-type polarizing member 4a reflects a component in the direction along the reflection axis B2 parallel to the absorption axis a2 (see fig. 4) of the absorption-type polarizing member 1e, and transmits a component in the direction along the transmission axis B1 parallel to the transmission axis a1 (see fig. 4) of the absorption-type polarizing member 1e, out of the illumination light C1 from the illumination device 5.
The reflective polarizing member 4a is, for example, a reflective polarizing multilayer film. The reflection-type polarizing multilayer film is a film obtained by laminating several hundred layers of polyester resins having different refractive indices, and can selectively reflect a reflection wavelength range. By matching the reflection wavelength range with the visible light, the visible light can be reflected and the infrared rays can be transmitted. The reflective polarizing multilayer film has a polarizing and reflecting function of reflecting a polarization component having an axial direction parallel to the reflection axis of light incident on the reflective polarizing multilayer film and transmitting a polarization component orthogonal to the reflection axis. That is, as shown in fig. 4, the reflective polarizing member 4a includes a transmission axis B1 and a reflection axis B2 that are orthogonal to each other. The reflection axis B2 of the reflection-type polarizing member 4a is arranged along the absorption axis a2 of the absorption-type polarizing member 1 e. The transmission axis B1 of the reflective polarizing member 4a is set so as to be along the transmission axis a1 of the absorptive polarizing member 1 e.
The reflection-type polarizing member 4a transmits a component along the transmission axis B1 in the illumination light C1 from the illumination device 5, and emits the transmitted illumination light C2 to the absorption-type polarizing member 1 e. The reflection-type polarization member 4a reflects a component of the illumination light C1 from the illumination device 5 along the reflection axis B2, and emits the reflected light C4 in a direction away from the liquid crystal display 1. The absorption-type polarizing member 1e transmits the illumination light C2 from the reflection-type polarizing member 4a, and emits the transmitted illumination light C3 to the liquid crystal cell 1a, the transparent substrates 1b and 1C, and the absorption-type polarizing member 1 d.
Since the reflection axis B2 of the reflection-type polarizing member 4a is disposed along the absorption axis a2 of the absorption-type polarizing member 1e, light along the absorption axis a2 of the absorption-type polarizing member 1e is suppressed from being emitted from the reflection-type polarizing member 4a to the absorption-type polarizing member 1 e. This suppresses absorption of the illumination light C1 by the absorption-type polarizing member 1e, and thus suppresses the absorption-type polarizing member 1e and thus the temperature rise of the liquid crystal display 1.
The light diffusion member 5e receives the reflected light C4 reflected by the reflective polarization member 4a, and diffuses and reflects the reflected light C4 toward the reflective polarization member 4 a. The amount of the illumination light C1, C2, and C3 illuminating the liquid crystal display 1 can be increased by the diffused light C5.
As shown in fig. 2, the adhesive 2 is located between the liquid crystal display 1 and the transmissive member 3, and bonds the transmissive member 3 to the back surface of the liquid crystal display 1. The adhesive 2 is formed of, for example, a translucent adhesive, as in the adhesive 4 b. The adhesive 2 also has a function of transferring heat of the liquid crystal display 1 to the transmissive member 3.
The transmissive member 3 is positioned between the two adhesive materials 2 and 4b, and has a function of increasing the heat capacity of a cell in which the liquid crystal display 1, the adhesive material 2, the transmissive member 3, the adhesive material 4b, and the reflective polarization member 4a are integrated. By increasing the thermal capacity of the cell, the temperature rise of the liquid crystal display 1 can be slowed down. Thus, for example, even when sunlight returns to the optical path of the display light L and is condensed on the liquid crystal display 1, the temperature of the liquid crystal display 1 can be easily maintained within the operation guaranteed temperature range of the liquid crystal display 1. This can suppress a problem of the liquid crystal display 1 associated with a temperature increase. From the viewpoint of heat capacity and specific heat, the permeable member 3 is preferably made of, for example, translucent glass. However, the permeable member 3 is not limited to this, and may be made of a resin such as polycarbonate.
(Effect)
In the first embodiment described above, for example, the following technical ideas are disclosed.
(1) The head-up display device 10 includes: a light source 5 a; a liquid crystal display 1 that emits display light L representing an image based on illumination light C1 from a light source 5 a; and a reflection-type polarization member 4a which is positioned between the light source 5a and the liquid crystal display 1, reflects a component along the reflection axis B2 in the incident illumination light C1 from the light source 5a in a direction different from the liquid crystal display 1, and transmits a component along the transmission axis B1, which is an example of a first transmission axis intersecting the reflection axis B2, to the liquid crystal display 1. The liquid crystal display 1 includes: a liquid crystal section 1 a; and an absorption-type polarizing member 1e that is provided closer to the light source 5a than the liquid crystal section 1a of the liquid crystal display 1, absorbs a component along the absorption axis a2 in the incident light, and transmits a component along the transmission axis a1 that is an example of a second transmission axis intersecting the absorption axis a 2. The reflection type polarization member 4a is disposed in the following direction: the reflection axis B2 of the reflection-type polarizing member 4a is along the absorption axis a2 of the absorption-type polarizing member 1e, and the transmission axis B1 of the reflection-type polarizing member 4a is along the transmission axis a1 of the absorption-type polarizing member 1 e.
According to this structure, a component along the absorption axis a2 of the absorption-type polarizing member 1e in the illumination light C1 from the light source 5a is reflected by the reflection-type polarizing member 4a provided in the front stage of the absorption-type polarizing member 1 e. Therefore, the absorption of the illumination light C2 transmitted through the reflection-type polarization member 4a by the absorption-type polarization member 1e is suppressed, and the temperature rise of the absorption-type polarization member 1e and thus the liquid crystal display 1 can be suppressed.
(2) The head-up display device 10 includes: a first lens 5C and a second lens 5d, which are positioned between the light source 5a and the liquid crystal display 1, and which are examples of an optical adjustment section for adjusting the illumination light C1 from the light source 5 a; and a light diffusion member 5e that is positioned between the first lens 5C and the second lens 5d and the liquid crystal display 1 and diffuses the illumination light C1 passing through the first lens 5C and the second lens 5 d. The reflective polarizing member 4a is positioned between the light diffusing member 5e and the liquid crystal display 1.
With this configuration, as shown in fig. 4, the light diffusing member 5e receives the reflected light C4 reflected by the reflective polarizing member 4a, and reflects the diffused light C5, which has diffused the reflected light C4, toward the reflective polarizing member 4 a. This can increase the light quantity of the illumination light C1, C2, and C3 for illuminating the liquid crystal display 1.
The reflective polarizer 4a is disposed closer to the liquid crystal display 1 than the light diffusing member 5e, the first lens 5c, and the second lens 5 d. Therefore, the change in the polarization state of the illumination light C2 transmitted through the reflection-type polarization member 4a due to the light-diffusing member 5e, the first lens 5C, and the second lens 5d is suppressed. This more reliably suppresses absorption of the illumination light C2 by the absorption-type polarizing member 1 e.
The head-up display device 10 further includes an illumination device 5 that emits unpolarized illumination light C1 to the liquid crystal display 1. The illumination device 5 includes a light source 5a, first and second lenses 5c and 5d, a light diffusion member 5e, and an illumination device case 5f that houses the light source 5a, first and second lenses 5c and 5d, and the light diffusion member 5 e.
In this configuration, since the reflective polarizing member 4a is provided between the light diffusing member 5e and the liquid crystal display 1, it is not necessary to provide the reflective polarizing member 4a in the illumination device 5. Therefore, the conventional illumination device 5 is not provided with the reflective polarization member 4a, and the reflective polarization member 4a can be easily provided in the head-up display device 10.
(3) The head-up display device 10 includes: a transmissive member 3 that transmits illumination light C1 from the light source 5a to the liquid crystal display 1; an adhesive 2, which is an example of a first adhesive for adhering the transmissive member 3 to the back surface of the liquid crystal display 1 near the light source 5 a; and an adhesive material 4b which is an example of a second adhesive material for adhering the reflective polarizing member 4a to the back surface of the transmissive member 3 close to the light source 5 a.
According to this configuration, the heat capacity of the unit in which the transmissive member 3 and the reflective polarizing member 4a are integrated is increased by the transmissive member 3. Therefore, the temperature rise of the liquid crystal display 1 can be reduced, and the temperature of the liquid crystal display 1 can be easily maintained within the operation guaranteed temperature range of the liquid crystal display 1.
(second embodiment)
A second embodiment of the head-up display device according to the present invention will be described with reference to the drawings. The second embodiment is different from the first embodiment in that a reflective polarizing member is provided between a light source and a light diffusing member. Hereinafter, differences from the first embodiment will be mainly described.
As shown in fig. 5, the illumination device 5 includes, as in the first embodiment, a plurality of light sources 5a, a light source substrate 5b, a first lens 5c, a second lens 5d, a light diffusion member 5e, and an illumination device case 5f, and further includes a reflective polarizing member 4a and an adhesive 4 b.
The reflective polarizing member 4a is provided on the back side of the light diffusion member 5e close to the second lens 5 d. Unlike the first embodiment, the reflective polarizing member 4a is not provided on the rear surface of the liquid crystal display 1.
As in the first embodiment, the reflection axis of the reflection-type polarizing member 4a is provided along the absorption axis of the absorption-type polarizing member 1 e. The reflective polarizing member 4a has the same operational effects as those of the first embodiment.
The adhesive 4b is positioned between the light-diffusing member 5e and the reflective polarizing member 4a, and bonds the reflective polarizing member 4a to the back surface of the light-diffusing member 5e close to the second lens 5 d.
(Effect)
In the second embodiment described above, for example, the following technical ideas are disclosed.
(A) The head-up display device 10 includes: a light source 5 a; a liquid crystal display 1 that emits display light L representing an image based on illumination light C1 from a light source 5 a; a first lens 5C and a second lens 5d, which are examples of an optical adjustment unit that adjusts the illumination light C1 from the light source 5 a; a light diffusion member 5e that is positioned between the first lens 5C and the second lens 5d and the liquid crystal display 1 and diffuses the illumination light C1 passing through the first lens 5C and the second lens 5 d; and a reflection-type polarization member 4a which is positioned between the light source 5a and the light diffusion member 5e in the optical path of the illumination light C1 from the light source 5a, reflects a component along the reflection axis B2 in the illumination light C1 from the light source 5a that has entered, in a direction different from the liquid crystal display 1, and transmits a component along the transmission axis B1, which is an example of the first transmission axis, to the liquid crystal display 1. The liquid crystal display 1 includes: a liquid crystal section 1 a; and an absorption-type polarizing member 1e that is provided closer to the light source 5a than the liquid crystal section 1a of the liquid crystal display 1, absorbs a component along the absorption axis a2 in the incident light, and transmits a component along the transmission axis a1 as an example of the second transmission axis. The reflective polarizing member 4a is disposed in the following direction: the reflection axis B2 of the reflection-type polarizing member 4a is along the absorption axis a2 of the absorption-type polarizing member 1e, and the transmission axis B1 of the reflection-type polarizing member 4a is along the transmission axis a1 of the absorption-type polarizing member 1 e.
According to this structure, a component along the absorption axis a2 of the absorption-type polarizing member 1e in the illumination light C1 from the light source 5a is reflected by the reflection-type polarizing member 4a provided in the front stage of the optical path of the absorption-type polarizing member 1 e. Therefore, absorption of the illumination light C2 by the absorption-type polarizing member 1e is suppressed, and the absorption-type polarizing member 1e, and thus the temperature rise of the liquid crystal display 1, can be suppressed.
(B) The head-up display device 10 includes an adhesive 4b that bonds the reflective polarization member 4a to the back surface of the light diffusion member 5e near the first lens 5c and the second lens 5 d.
According to this configuration, the reflective polarizing member 4a may be bonded to the back surface of the light diffusing member 5e, and thus a simple configuration can be realized.
The present invention is not limited to the above embodiments and drawings. Changes (including deletion of constituent elements) may be made as appropriate without departing from the scope of the present invention. An example of the modification is described below.
(modification example)
In the first embodiment, as shown in fig. 2, the reflective polarizing member 4a is attached to the back surface of the liquid crystal display 1 via the transmissive member 3. However, the present invention is not limited to this, and the transmissive member 3 may be omitted, and as shown in fig. 6, the reflective polarizing member 4a may be attached to the back surface of the liquid crystal display 1 via an adhesive 4 b.
In the modification of fig. 6, for example, the following technical ideas are disclosed.
The head-up display device 10 includes an adhesive 4b which is positioned between the liquid crystal display 1 and the reflective polarization member 4a and bonds the reflective polarization member 4a to the back surface of the liquid crystal display 1 near the light source 5 a.
According to this configuration, the reflective polarizing member 4a may be bonded to the back surface of the liquid crystal display 1, and thus a simple configuration can be realized. Further, the reflective polarizing member 4a can be brought close to the liquid crystal display 1, and the polarization state of the light transmitted through the reflective polarizing member 4a can be suppressed from changing before reaching the absorption-type polarizing member 1e of the liquid crystal display 1. This more reliably suppresses absorption of the illumination light C2 by the absorption-type polarizing member 1 e.
As shown in fig. 7, the reflective polarizing member 4a may be provided on the surface of the light diffusing member 5e close to the liquid crystal display 1. The adhesive 4b of the reflective polarizing member 4a is positioned between the reflective polarizing member 4a and the light diffusing member 5e, and bonds the reflective polarizing member 4a to the surface of the light diffusing member 5 e.
In the modification of fig. 7, for example, the following technical ideas are disclosed.
The head-up display device 10 includes an adhesive 4b for adhering the reflective polarizing member 4a to the surface of the light diffusion member 5e close to the liquid crystal display 1.
According to this configuration, since the reflective polarizing member 4a only needs to be bonded to the surface of the light diffusing member 5e, a simple configuration can be realized.
As shown in fig. 8, the illumination device 5 may further include a transmissive member 11, a reflective polarizing member 4a, and an adhesive 4b, which are formed in a plate shape and have light transmittance. The transparent member 11 is held in the lighting device case 5f by a holding member not shown. The reflective polarizing member 4a is provided on the rear surface side of the transmissive member 11 close to the second lens 5 d. The adhesive 4b is positioned between the reflective polarizing member 4a and the transmissive member 11, and bonds the reflective polarizing member 4a to the back surface of the transmissive member 11. In addition, the reflective polarizing member 4a may be provided on the surface of the transmissive member 11 close to the light diffusing member 5e via the adhesive 4b, without being limited to the modification of fig. 8.
In the modification of fig. 8, for example, the following technical ideas are disclosed.
The head-up display device 10 includes: a light-transmitting member 11 that is positioned between the light-diffusing member 5e and the light source 5a (for example, between the light-diffusing member 5e and the first and second lenses 5c and 5 d), and that has light-transmitting properties; and an adhesive 4b that bonds the reflective polarizing member 4a to the transmissive member 11.
With this configuration, the transmissive member 11 is a special product for attaching the reflective polarizing member 4 a. Therefore, the degree of freedom in the installation position of the reflection type polarization member 4a is improved.
In the above configuration, the permeable member 11 is different from the permeable member 3 of the first embodiment, and the heat capacity does not need to be taken into consideration. Therefore, the permeable member 11 is preferably made of a resin such as polycarbonate which is less expensive and lighter than glass. However, the permeable member 11 may be formed of glass.
In the modification of fig. 8, the transmissive member 11 to which the reflective polarizing member 4a is attached is located between the light diffusing member 5e and the second lens 5d, but the present invention is not limited thereto, and may be located between the first lens 5c and the light source 5a or between the first lens 5c and the second lens 5 d.
As shown in fig. 9, the reflective polarizing member 4a may be provided on the surface side of the second lens 5d close to the light diffusing member 5 e. The adhesive 4b adheres the reflective polarizing member 4a to the surface of the second lens 5 d. In view of accurately attaching the reflective polarizing member 4a to the surface of the second lens 5d, the surface of the second lens 5d is preferably formed in a planar shape. However, the present invention is not limited to this, and the reflective polarizing member 4a may be attached to the surface of the second lens 5d formed in a curved shape.
In the modification of fig. 9, the following technical ideas are disclosed.
The head-up display device 10 includes an adhesive 4b for adhering the reflection-type polarization member 4a to the surface of the second lens 5d provided at the closest position to the liquid crystal display 1 in the light adjustment unit, the surface being close to the light diffusion member 5 e.
According to this configuration, since the reflective polarizing member 4a only needs to be bonded to the surface of the second lens 5d, a simple configuration can be realized.
The reflective polarizing member 4a is not limited to the modification of fig. 9, and may be attached to the back surface of the second lens 5d, the front surface of the first lens 5c, or the back surface of the first lens 5 c.
In addition, the reflective polarizing member 4a may be attached to the surface of the light source 5a close to the first lens 5 c.
In the above embodiments and the above modifications, the reflection-type polarization member 4a emits the transmitted light among the lights from the light source 5a to the liquid crystal display 1, but the present invention is not limited thereto, and the reflected light among the lights from the light source 5a may be emitted to the liquid crystal display 1.
Specifically, as shown in fig. 10, the illumination device 5 includes a reflective polarizing member 12a instead of the reflective polarizing member 4 a.
As shown in fig. 11, the reflection axis D2 of the reflection-type polarizing member 12a is disposed along the transmission axis a1 of the absorption-type polarizing member 1e, and the transmission axis D1 of the reflection-type polarizing member 12a is disposed along the absorption axis a2 of the absorption-type polarizing member 1 e. The reflection-type polarization member 12a reflects the component along the reflection axis D2 of the illumination light Ca from the light source 5a as illumination light Cb toward the absorption-type polarization member 1e of the liquid crystal display 1, and transmits the component along the transmission axis D1 as transmission light Cc in a direction different from the liquid crystal display 1. This also suppresses absorption of light from the light source 5a by the absorption-type polarizing member 1 e. The reflective polarizing member 12a is, for example, a reflective polarizing multilayer film, like the reflective polarizing member 4 a.
As shown in fig. 10, the reflective polarizing member 12a is bonded to the surface of the transmissive substrate 12b via an adhesive 12 c. The transparent base material 12b is formed in a plate shape from, for example, a light-transmitting resin or glass. The adhesive 12c is made of, for example, a translucent adhesive, similarly to the adhesive 4 b.
In the modification of fig. 10, for example, the following technical ideas are disclosed. The head-up display device 10 includes: a light source 5 a; a liquid crystal display 1 that emits display light L representing an image based on illumination light Cb from a light source 5 a; and a reflective polarizing member 12a which is positioned between the light source 5a and the liquid crystal display 1, reflects a component along the reflection axis D2 in the incident illumination light Ca from the light source 5a toward the liquid crystal display 1, and transmits a component along the transmission axis D1 as an example of the first transmission axis in a direction different from that of the liquid crystal display 1. The liquid crystal display 1 includes an absorption-type polarizing member 1e which is provided at a position closer to the light source 5a than the liquid crystal section 1a of the liquid crystal display 1, absorbs a component along the absorption axis a2 in incident light, and transmits a component along the transmission axis a1 as an example of the second transmission axis. The reflection type polarization member 12a is disposed in the following direction: the transmission axis D1 of the reflective polarizing member 12a is along the absorption axis a2 of the polarizing member 1e, and the reflection axis D2 of the reflective polarizing member 12a is along the transmission axis a1 of the absorptive polarizing member 1 e.
With this configuration, the component of the illumination light Ca from the light source 5a along the absorption axis a2 of the absorption-type polarizing member 1e is directed in a direction different from that of the liquid crystal display 1 as transmitted light Cc, which is transmitted through the reflection-type polarizing member 12a disposed in the front stage of the optical path of the absorption-type polarizing member 1 e. Therefore, absorption of the illumination light Cb by the absorption-type polarization member 1e is suppressed, and the absorption-type polarization member 1e, and thus the temperature rise of the liquid crystal display 1, can be suppressed.
In the modification of fig. 10, the reflective polarizing member 12a is positioned between the light source 5a and the first lens 5c in the optical path, but is not limited to this, and may be positioned between the first lens 5c and the second lens 5d, between the second lens 5d and the light-diffusing member 5e, or between the light-diffusing member 5e and the liquid crystal display 1.
In addition, the configurations according to the modifications of fig. 6 to 11 also exhibit the operational effects described in (1) and (a) above.
In each of the above embodiments and each of the above modifications, the head-up display device 10 may include a mirror rotation driving unit that rotates the second reflecting mirror 6 about a rotation axis extending in a direction perpendicular to the plane of fig. 1. When the second reflecting mirror 6 rotates about the rotation axis, the irradiation position of the display light L with respect to the viewer can be adjusted in the vertical direction.
In the first embodiment, as shown in fig. 2, the adhesive 2 is provided as an adhesive layer between the liquid crystal display 1 and the transmissive member 3, but the adhesive 2 may be omitted and a gap may be provided between the liquid crystal display 1 and the transmissive member 3. Further, the gap may be omitted, and the liquid crystal display 1 may be brought into surface contact with the transmissive member 3.
In the above embodiments and the above modifications, the light adjustment section is constituted by the first lens 5c and the second lens 5d, but the number of lenses and the type of lenses are not limited to these. The optical adjustment unit may include an optical member such as a mirror instead of the lens. The adhesive materials 2, 4b, and 12c may be double-sided tapes, screws, or gripping structures for gripping and adhering two members in the thickness direction thereof. In the case of using the holding structure as the adhesive materials 2, 4b, and 12c, for example, the liquid crystal display 1, the transmissive member 3, and the reflective polarizing member 4a are stacked so as to be in direct surface contact with each other without an adhesive layer made of the adhesive materials 2 and 4b in fig. 2, and the holding structure is held in the surface contact state.
Claims (10)
1. A head-up display device is characterized by comprising:
a light source;
a liquid crystal display that emits display light representing an image based on the light from the light source; and
a reflection-type polarization member that is located between the light source and the liquid crystal display in an optical path of light from the light source, reflects a component along a reflection axis in the incident light from the light source in a direction different from the liquid crystal display, and transmits a component along a first transmission axis intersecting the reflection axis to the liquid crystal display,
the liquid crystal display includes an absorption-type polarizing member that is provided closer to the light source than a liquid crystal section of the liquid crystal display, absorbs a component along an absorption axis of incident light, and transmits a component along a second transmission axis intersecting the absorption axis,
the reflection-type polarization member is disposed in the following direction: the reflection axis of the reflective polarizing member is along the absorption axis of the absorptive polarizing member.
2. The head-up display device according to claim 1, comprising:
an optical adjustment unit that is located between the light source and the liquid crystal display and adjusts light from the light source; and
a light diffusion member that is positioned between the light adjustment section and the liquid crystal display in an optical path of the light from the light source and diffuses the light passing through the light adjustment section,
the reflection-type polarization member is located between the light diffusion member and the liquid crystal display.
3. The head-up display device according to claim 1 or 2, comprising:
a transmissive member that transmits light from the light source to the liquid crystal display;
a first adhesive material that adheres the transmissive member to a back surface of the liquid crystal display that is close to the light source; and
a second adhesive material that adheres the reflective polarizing member to a back surface of the transmissive member near the light source.
4. Head-up display device according to claim 1 or 2,
the disclosed device is provided with: an adhesive material positioned between the liquid crystal display and the reflective polarizing member to adhere the reflective polarizing member to a back surface of the liquid crystal display near the light source.
5. Head-up display device according to claim 2,
the disclosed device is provided with: an adhesive material that adheres the reflection-type polarization member to a surface of the light diffusion member that is close to the liquid crystal display.
6. A head-up display device is characterized by comprising:
a light source;
a liquid crystal display that emits display light representing an image based on the light from the light source; and
a reflection-type polarization member that is positioned between the light source and the liquid crystal display in an optical path of light from the light source, reflects a component along a reflection axis in the incident light from the light source toward the liquid crystal display, and transmits a component along a first transmission axis intersecting the reflection axis in a direction different from that of the liquid crystal display,
the liquid crystal display includes an absorption-type polarizing member that is provided closer to the light source than a liquid crystal section of the liquid crystal display, absorbs a component along an absorption axis of incident light, and transmits a component along a second transmission axis intersecting the absorption axis,
the reflection-type polarizing member is disposed in the following direction: the first transmission axis of the reflective polarizing member is along the absorption axis of the absorptive polarizing member.
7. A head-up display device is characterized by comprising:
a light source;
a liquid crystal display that emits display light representing an image based on the light from the light source;
an optical adjustment unit that is positioned between the light source and the liquid crystal display in an optical path of light from the light source, and adjusts the light from the light source;
a light diffusion member that is positioned between the light adjustment section and the liquid crystal display in an optical path of the light from the light source, and diffuses the light that has passed through the light adjustment section; and
a reflection-type polarizing member that is positioned between the light source and the light diffusion member in an optical path of the light from the light source, reflects a component along a reflection axis in the incident light from the light source in a direction different from the liquid crystal display, and transmits a component along a first transmission axis intersecting the reflection axis to the liquid crystal display,
the liquid crystal display includes an absorption-type polarizing member that is provided closer to the light source than a liquid crystal section of the liquid crystal display, absorbs a component along an absorption axis of incident light, and transmits a component along a second transmission axis intersecting the absorption axis,
the reflection-type polarization member is disposed in the following direction: the reflection axis of the reflective polarizing member is along the absorption axis of the absorptive polarizing member.
8. Head-up display device according to claim 7,
the disclosed device is provided with: an adhesive material that adheres the reflection-type polarization member to a back surface of the light diffusion member near the light adjustment section.
9. The head-up display device according to claim 7, comprising:
a light-transmitting member having light-transmitting properties, the light-transmitting member being positioned between the light-diffusing member and the light source in an optical path of light from the light source; and
an adhesive material that bonds the reflective polarizing member to the transmissive member.
10. Head-up display device according to claim 7,
the disclosed device is provided with: an adhesive material that adheres the reflective polarizing member to the light adjustment section.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-198305 | 2019-10-31 | ||
| JP2019-198306 | 2019-10-31 | ||
| JP2019198305 | 2019-10-31 | ||
| JP2019198306 | 2019-10-31 | ||
| PCT/JP2020/040341 WO2021085447A1 (en) | 2019-10-31 | 2020-10-28 | Head-up display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216848388U true CN216848388U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202090000841.1U Active CN216848388U (en) | 2019-10-31 | 2020-10-28 | Head-up display device |
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| Country | Link |
|---|---|
| JP (1) | JPWO2021085447A1 (en) |
| CN (1) | CN216848388U (en) |
| DE (1) | DE112020005380T5 (en) |
| WO (1) | WO2021085447A1 (en) |
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| CN114594604A (en) * | 2022-03-09 | 2022-06-07 | 江苏泽景汽车电子股份有限公司 | Ghost image reduction method and head-up display system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010256867A (en) * | 2009-03-30 | 2010-11-11 | Victor Co Of Japan Ltd | Head-up display and image display method |
| JP6263953B2 (en) | 2013-10-24 | 2018-01-24 | 日本精機株式会社 | Display device |
| KR101519352B1 (en) * | 2013-12-12 | 2015-05-21 | 현대오트론 주식회사 | Head-up display |
| JP6459921B2 (en) * | 2015-11-19 | 2019-01-30 | 株式会社デンソー | Head-up display device |
| JP6711337B2 (en) * | 2017-09-07 | 2020-06-17 | 株式会社デンソー | Head-up display device and image projection unit |
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2020
- 2020-10-28 WO PCT/JP2020/040341 patent/WO2021085447A1/en active Application Filing
- 2020-10-28 JP JP2021553639A patent/JPWO2021085447A1/ja active Pending
- 2020-10-28 CN CN202090000841.1U patent/CN216848388U/en active Active
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| JPWO2021085447A1 (en) | 2021-05-06 |
| DE112020005380T5 (en) | 2022-08-11 |
| WO2021085447A1 (en) | 2021-05-06 |
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