WO2022249912A1 - 車両用投影装置、その動作方法、及び車両用灯具 - Google Patents
車両用投影装置、その動作方法、及び車両用灯具 Download PDFInfo
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- WO2022249912A1 WO2022249912A1 PCT/JP2022/020356 JP2022020356W WO2022249912A1 WO 2022249912 A1 WO2022249912 A1 WO 2022249912A1 JP 2022020356 W JP2022020356 W JP 2022020356W WO 2022249912 A1 WO2022249912 A1 WO 2022249912A1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/16—Controlling the light source by timing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
- B60Q1/38—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction using immovably-mounted light sources, e.g. fixed flashing lamps
- B60Q1/381—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction using immovably-mounted light sources, e.g. fixed flashing lamps with several light sources activated in sequence, e.g. to create a sweep effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/155—Coordinated control of two or more light sources
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Definitions
- the present disclosure relates to a vehicle projection device, its operation method, and a vehicle lamp.
- a technology has been developed that projects a pattern (for example, an arrow) that indicates the direction of travel of the vehicle onto the road surface to alert pedestrians and drivers around the vehicle. For example, when the own vehicle turns left or changes lanes to the left lane, an arrow pointing diagonally to the left is projected on the road surface on the left front side of the own vehicle, thereby alerting pedestrians and drivers around the own vehicle. can do. This is particularly effective when surrounding traffic conditions and structures (such as walls along the road) make it difficult for pedestrians and drivers to see the blinking of the turn lamps of the own vehicle.
- Patent Document 1 discloses a technique for starting to draw a marker indicating the traveling direction of the vehicle on the road surface when the turn signal lamp is turned on, and finishing drawing the marker when the turn signal lamp is turned off.
- Patent Document 2 discloses a device for projecting an image onto a road surface using a shade provided with an opening shaped to correspond to an arrow (see paragraph 0044 of the same document).
- the image When projecting an image that indicates the direction of travel of the vehicle onto the road surface, instead of projecting a certain image all at once, the image should be divided and projected sequentially (i.e., multiple individual images are projected sequentially at different points in time). (starting projection) is expected to call attention more effectively.
- the number of divisions of the image i.e., the number of individual images
- the number of individual images is limited due to the limited road surface area allowed for the projection of the entire image.
- a visual effect for example, a visual effect in which individual images appear to flow.
- the inventors of the present application have found a new problem of making it easier to obtain a visual effect by projecting sequential individual images even when the number of individual images is limited. Note that the number of image divisions and the number of individual images are also restricted from the viewpoint of the cost and/or size of the projection apparatus.
- a vehicle projection device has at least M (M is a natural number of 2 or more) light sources, and at least N (N is 2 or more) based on lighting of at least M light sources.
- the control unit projects at least N individual images at a second time after a first time when a period of P/N milliseconds has elapsed from a projection start time of an image projected first in the at least N individual images. is configured to control the at least M light sources such that projection of the second projected image at is initiated.
- N represents a natural number of 3 or 4 or 5 and P represents a real number within the range of 250-500.
- the period in which the first projected image is projected alone is preferably in the range of 35% to 60% of P milliseconds.
- the second point in time may be closer to the first point in time than a third point in time, which is a period of 2*(P/N) milliseconds from the first point in time.
- the second time point may be a time point within the range of 5 milliseconds to 70 milliseconds from the first time point.
- the second point in time may be a point in the range of 1.5*(P/(N+1)) milliseconds to 2*(P/(N+1)) milliseconds.
- Q is a real number
- the natural number denoted by M is equal to the natural number denoted by N, and the projection start times of the N individual images onto the road surface are different for all of the N individual images.
- control unit controls at least M light sources for projecting at least N individual images onto a road surface in response to timing signals transmitted from the vehicle body;
- the at least M light sources are configured to control the at least M light sources to repeat non-projection periods during which all of the at least M light sources are extinguished, the predetermined period being equal to the projection period.
- the projection unit includes a first lens having at least M lens units corresponding to at least M light sources, and a second lens for projecting the emitted light of the at least M light sources. and a pattern forming member provided between the first lens and the second lens and having at least M light transmitting portions provided in the light shielding portion corresponding to at least M light sources.
- a method of operating a vehicle projection device has at least M (M is a natural number of 2 or more) light sources, and at least N (N is A projection unit that projects individual images on a road surface along a predetermined direction, and a predetermined period of time that lasts at least P milliseconds (P is a real number of 200 or more), and the start of the predetermined period. Projection of at least N individual images onto the road surface is started in a predetermined order from the time point, all of the at least N individual images are projected onto the road surface at an intermediate time point of the predetermined period, and at least N individual images are projected at the end of the predetermined period.
- a method of operating a vehicle projection device including a control unit for controlling at least M light sources so as to finish projecting individual images of on a road surface, starting the projection of the first projected image of the at least N individual images; Projection of the second image among the at least N individual images is started at a second time after the first time P/N milliseconds from the start of projection of the first image.
- FIG. 1 is a schematic diagram showing a system configuration of a vehicle according to one aspect of the present disclosure
- FIG. 1 is a schematic diagram showing a schematic configuration of a front lamp according to one aspect of the present disclosure
- FIG. FIG. 4 is a schematic diagram showing a projection procedure in which projection of individual images is sequentially started in the order of (a) to (c) and finally all individual images (whole image) are projected onto a road surface.
- 1 is a schematic diagram showing a schematic configuration of a projection unit of a projection device according to one aspect of the present disclosure
- FIG. FIG. 5 is a schematic perspective view showing the arrangement relationship of a condenser lens, a pattern forming member, and a projection lens in the projection unit of the projection device shown in FIG. 4;
- FIG. 2 is a schematic block diagram that is referred to for explanation of the configuration and function of a control section of a vehicle lamp (vehicle projection device); 5 is a schematic time chart regarding lighting control of each light source of the turn lamp and the projection unit;
- FIG. 4 is a schematic diagram showing a modified example of the individual images. Similar to FIG. 3, projection of the individual images is started sequentially in the order of (a) to (c), and finally all the individual images (overall image) are projected onto the road surface. projected.
- FIG. 4 is a schematic diagram showing that projection of individual images is started sequentially in the order of (a) and (b), and finally all individual images (overall image) are projected onto a road surface;
- FIG. 10 is a schematic time chart for the case of FIG. 9;
- FIG. 4 is a time chart for a case where lighting of each light source is controlled by a PWM signal;
- the front-rear direction, the left-right direction, and the up-down direction are grasped with the vehicle 1 as a reference.
- the inside of the vehicle is any direction from the outside of the vehicle toward the inside of the vehicle.
- the vehicle outward direction is an arbitrary direction from inside the vehicle to outside the vehicle.
- the vertical direction corresponds to or extends along the vertical direction.
- the vehicle inner and outer sides may be contained in any plane that intersects or is perpendicular to the vertical direction.
- the vehicle 1 is a two-wheeled, three-wheeled, or four-wheeled self-propelled mobile object that is driven by power generated by an internal combustion engine or an electric motor.
- a vehicle 1 is configured by attaching vehicle lamps to a vehicle body, and each includes independent vehicle and lamp systems 2 and 3 .
- the vehicle system 2 is configured by connecting individual elements via an in-vehicle network. For convenience of explanation, FIG. , and steering sensor 77) are shown.
- the vehicle ECU 71 can be composed of one or more sub-ECUs.
- the direction indicator 72 is operated by the driver's voice, hand, foot, or the like to generate a turn signal.
- a hazard switch 74 is operated by the driver to generate a hazard signal.
- These turn signals and hazard signals are transmitted to the lighting system 3 through or without the vehicle ECU 71 .
- the turn signal and the hazard signal are timing signals in which pulses are generated at a constant cycle, and are generically referred to as timing signals without distinguishing between the two.
- the lamp system 3 includes left and right front lamps (vehicle lamps) 4 for illuminating the front in the traveling direction of the vehicle.
- Each front lamp 4 has, for example, a low beam lamp 4a, a high beam lamp 4b, a turn lamp 4c, a projection part 4d, and a constant lighting lamp 4e, which are provided in a common lamp chamber, as shown in FIG.
- the constant lighting lamp 4e is a daytime running lamp and/or a clearance lamp.
- the lamp chamber is defined by an outer lens attached to the concave housing.
- a projection device for sequentially projecting the individual images 5a to 5c onto the road surface is composed of the projection section 4d of the front lamp 4 and the control section 31. As shown in FIG.
- the turn lamp 4c blinks in synchronization with a timing signal supplied from the vehicle body such as a turn signal and a hazard signal. For example, the light is turned off according to the falling edge.
- the turn lamp 4c can include one or more semiconductor light-emitting elements such as LEDs (Light Emitting Diodes) and LDs (Laser Diodes) as a light source.
- the turn lamp 4c may be of a sequential type, but is not limited to this.
- the projection unit 4d starts projecting the individual images onto the road surface in synchronization with the first change (for example, rise) of the timing signal supplied from the vehicle body such as the turn signal and the hazard signal, and the second change of the timing signal (for example, the projection of the predetermined image onto the road surface is stopped in synchronization with the falling edge (this point will be described later with reference to FIG. 7).
- the first change for example, rise
- the second change of the timing signal For example, the projection of the predetermined image onto the road surface is stopped in synchronization with the falling edge (this point will be described later with reference to FIG. 7).
- the projection unit 4d has at least M light sources, and projects at least N individual images onto the road surface along a predetermined direction based on the lighting of the at least M light sources.
- M represents a natural number of 2 or more.
- N represents a natural number of 2 or more.
- the projection unit 4d has three light sources 21a-21c, and based on the lighting of the three light sources 21a-21c, 3 light sources 21a-21c.
- the four individual images 5a to 5c are projected onto the road surface along a predetermined direction (for example, along the outer side of the vehicle intersecting the vertical direction) (see FIG. 3).
- the light source 21 includes one or more or two or more semiconductor light-emitting elements such as LEDs (Light Emitting Diodes) and LDs (Laser Diodes), although this is not necessarily the case.
- the light sources 21a-21c can be mounted on the substrate 22 and thermally connected to a heat sink (not shown).
- M and N represent natural numbers of 5 or less. Not as long.
- the position of the projection part 4d in the front lamp 4 need not be arranged adjacent to the turn lamp 4c as shown in FIG.
- the projection unit 4d outside the front lamp (for example, a side mirror).
- the low beam lamp 4a, the high beam lamp 4b, and the constant lighting lamp 4e can be those well known in this field, and detailed description thereof will be omitted.
- FIG. 3 when the three individual images 5a to 5c are sequentially projected onto the road surface from the projection unit 4d of the left front lamp, the surrounding drivers and pedestrians are warned that the driver of the vehicle 1 is turning left or left. lane change intent is presented.
- FIG. 3(a) only the individual image 5a is projected, then as shown in FIG. 3(b), projection of the individual image 5b is started, and finally, as shown in FIG. Projection of the individual image 5c is started as shown, and finally all the individual images 5a to 5c are projected onto the road surface.
- the number of individual images is 4 or 5.
- the projection of the individual image 5a which is projected first among the three individual images 5a to 5c, is performed after the first time when a period of 250/3 milliseconds has elapsed from the start of projection of the individual image 5a.
- the projection of the second projected individual image 5b is started. This makes it easier to obtain the visual effect of projecting the sequential individual images than when the projection of the second individual image is started at the first point in time.
- the individual images 5a to 5c can appear to the observer (pedestrians and drivers around the vehicle) to flow smoothly along the projection direction. can.
- 3 can be represented by M as any natural number greater than or equal to 2
- a predetermined period of 250 milliseconds can be represented by P milliseconds as any real number greater than or equal to 200. be able to.
- the predetermined period of 250 milliseconds can be understood as one projection period by the projection unit according to the timing signal and is equal to the pulse duration (H level period) of the timing signal. Note that when a period of time is equal to another period of time, it means that the period of time is within 95% to 105% of the other period of time.
- P represents a real number in the range of 250-500.
- the individual images and/or the collective overall image are shaped so as to suit the purpose of presenting the intentions of the driver of the vehicle 1 to surrounding drivers and pedestrians, and should not be limited to those shown. do not have.
- the individual images 5a extend along a predetermined projection direction and widen as they extend in this direction (that is, they are approximately triangular).
- the individual images 5b and 5c extend curvedly so as to intersect the predetermined projection direction (that is, they have a curved rectangular shape).
- the combination of these individual images 5a-5c builds up a split-cone-shaped overall image which widens continuously along the given projection direction.
- the same individual image and overall image may be projected onto the road surface from the projection unit of the right front lamp, but a different image may also be projected.
- a similar projection unit can be provided for the rear lamps as well.
- the projection unit 4d includes, in addition to the light sources 21a to 21c described above, a condenser lens (first lens) 24, a pattern forming member 25, a light shielding member 27, and a projection lens. (second lens) 28 and housing 29 (see FIGS. 4 and 5).
- the condenser lens 24 has M lens portions 24a to 24c corresponding to the M light sources 21a to 21c.
- Each of the lens portions 24a to 24c is configured to converge light emitted from the light sources 21a to 21c to the light transmitting portions 26a, 26b, and 26c of the pattern forming member 25 individually.
- the lens portion 24a converges the light emitted from the light source 21a onto the translucent portion 26a.
- the lens portion 24b converges the light emitted from the light source 21b onto the translucent portion 26b.
- the lens portion 24c converges the light emitted from the light source 21c onto the translucent portion 26c.
- Each of the lens portions 24a to 24c has incident surfaces 24a1 to 24c1 and output surfaces 24a2 to 24c2.
- An optically functional layer such as an antireflection film may be applied to the incident surfaces 24a1 to 24c1.
- the lens portions 24a to 24c are stacked in a predetermined direction (for example, vertical direction).
- the lens portions 24a to 24c may be individually manufactured (for example, by cutting and polishing a glass body, or by resin injection molding) and then fixed to each other with an adhesive, but this is not necessarily the case. .
- the pattern forming member 25 is an optical component in which M light transmitting portions 26a to 26c corresponding to the M light sources 21a to 21c are provided in the light shielding portion 26j.
- the translucent portions 26a-26c are optical apertures, typically hollow holes, but not limited to, solid filled with a material that is substantially transparent to the emitted light of the light source. holes may be used.
- Part of the light emitted from the light sources 21a to 21c enters the light transmitting portions 26a to 26c, and the rest does not enter the light transmitting portions 26a to 26c. In this manner, the light emitted from the light sources 21a to 21c is converted by the pattern forming member 25 into light rays having shapes corresponding to the contours of the light transmitting portions 26a to 26c.
- the translucent part 26a has a contour corresponding to the individual image 5a for the projection of the individual image 5a.
- the translucent part 26b has a contour corresponding to the individual image 5b for the projection of the individual image 5b.
- the translucent portion 26c has a contour corresponding to the individual image 5c for projection of the individual image 5c.
- the pattern forming member 25 can be configured by laminating a plurality of members such as a first member 25p and a second member 25q.
- a plate-shaped light shielding portion 26j of a member (the second member 25q in FIG. 5) having the pattern forming member 25 is provided with M light transmitting portions 26a to 26c, and a wall surface defining the outline of the light transmitting portions 26a to 26c. Light scattering in is suppressed.
- a light blocking member 27 can be provided to optically partition the optical channels CH1 to CH3 between the light sources 21a to 21c and the light transmitting portions 26a to 26c, thereby suppressing crosstalk between the optical channels CH1 to CH3. be done.
- a first light blocking member 27m is provided for optically dividing the optical channels CH1 and CH2
- a second light blocking member 27n is provided for optically dividing the optical channels CH1 and CH2.
- M ⁇ 1 light blocking members 27 can be provided corresponding to the number of M optical channels, the number is not necessarily limited to this.
- a common light blocking member can also be employed for individual isolation of all light channels.
- the projection lens 28 projects light transmitted through the translucent portions 26a, 26b, and 26c of the pattern forming member 25 (that is, light rays emitted from the pattern forming member 25) onto the road surface around the vehicle 1 (for example, front or rear). Project.
- the projection lens 28 is provided in common to the plurality of translucent portions 26a to 26c, which facilitates miniaturization and cost reduction of the projection portion 4d.
- the condenser lens 24 , pattern forming member 25 and projection lens 28 are fixed in a common light-tight housing 29 .
- the housing 29 is constructed by combining the upper housing with the lower housing, so that the projection section 4d can be easily assembled.
- the projection unit 4d may be provided on the vehicle so that the optical axis AX of the projection lens 28 extends forward obliquely downward and obliquely intersects the horizontal direction orthogonal to the vertical direction, but this is not necessarily the case.
- the light emitted from the light source 21a is transmitted along the optical axis AX of the projection unit 4d (projection lens 28) through the lens unit 24a of the condenser lens 24, the light transmission unit 26a, and the light transmission unit 26a. Propagating through the projection lens 28 .
- the light emitted from the light source 21a is condensed on the translucent portion 26a through the lens action of the exit surface 24a2 of the lens portion 24a.
- a portion (for example, 80%) of the light emitted from the exit surface 24a2 of the lens portion 24a is transmitted through the translucent portion 26a, and the remaining portion is absorbed by the light shielding portion 26j or the light shielding member 27.
- the light emitted from the light source 21b and the light source 21c can also be understood in the same way, and redundant description will be omitted.
- the light transmitted through the translucent portions 26 a , 26 b , 26 c is projected onto the road surface around the vehicle 1 via the projection lens 28 .
- control unit of the lamp controls both the light source of the turn lamp and the light source of the projection unit.
- a lamp according to the present disclosure includes a projection device, so the controller of the lamp can also be understood as a controller of the projection device.
- the control unit 31 controls the three light sources 21a to 21c for projecting the three individual images 5a to 5c onto the road surface according to the timing signal, and turns off all the three light sources during the projection period. It is configured to control the three light sources 21a-21c to repeat non-projection periods.
- the projection period corresponds to the period during which the pulse of the timing signal is at H level
- the non-projection period corresponds to the period during which the pulse of the timing signal is at L level.
- the control unit 31 controls the projection of the three individual images 5a to 5c onto the road surface from the start of the projection period (at least P (P represents a real number of 200 or more) milliseconds) during the projection period. All three individual images 5a to 5c are projected onto the road surface at the middle point of the projection period, and projection of the three individual images 5a to 5c onto the road surface is completed at the end point of the projection period.
- three light sources 21a to 21c are controlled at the same time.
- the end of the projection of the three individual images 5a-5c onto the road surface is achieved by turning off the three light sources 21a-21c at the same time or substantially at the same time. For example, slight differences that are imperceptible to humans may be provided. In some cases, the end of the projection period equals when all light sources 21a-21c have been extinguished, or the end of the projection period equals the time when all light sources 21a-21c are extinguished at the same time.
- control unit 31 causes the individual image 5a, which is projected first among the three individual images 5a to 5c, to be projected later than the first time when a period of 250/3 milliseconds has elapsed from the start of projection. It is arranged to control the three light sources 21a-21c such that at a second instant the projection of the second projected individual image 5b is started. This makes it easier to obtain the visual effect of sequential individual image projection than when the projection of the second individual image is started at the first point in time.
- 3 can be represented by M and N as any natural number greater than or equal to 2, and 250 milliseconds by P milliseconds as any real number greater than or equal to 200 (e.g., a real number greater than or equal to 250 and less than or equal to 500).
- Q the time interval from the start point of the projection period to the intermediate point (that is, the point at which the road surface projection of the three individual images 5a to 5c is completed) is Q milliseconds (Q represents a real number), (Q/P) ⁇ 0.8 can be satisfied. In some cases, 0.5 ⁇ (Q/P) ⁇ 0.8 is satisfied. In this case, a necessary and sufficient total lighting period can be secured in the projection period.
- the controller 31 is suitably configured to control the light sources 21a-21c as described above.
- the control unit 31 may be composed of an analog circuit, a digital circuit, an analog-digital mixed circuit, a PLD (Programmable Logic Device), a microcomputer, or any combination selected from these.
- the control section 31 includes a timing adjustment section 31a and a drive section 31b.
- the timing adjustment unit 31a can be configured by an analog circuit, a digital circuit, an analog-digital mixed circuit, a PLD (Programmable Logic Device), a microcomputer, or any combination selected from these.
- the drive unit 31b may include an analog circuit, an analog-digital mixed circuit, or the like.
- the timing adjustment unit 31a adjusts the lighting signals s1 to s3 and s8 (for example, pulses of voltage or current) in synchronization with a first change (for example, rising from L level to H level) of a timing signal such as a turn signal or a hazard signal. signals) are output in a predetermined order, and the output of the lighting signals s1 to s3 and s8 is stopped all at once in synchronization with the second change (for example, falling from H level to L level) of the timing signal.
- the timing signal can also be used as the lighting signals s1 and s8.
- the output timing of the lighting signals s1 to s3 can be adjusted by various methods.
- the timing adjustment unit 31a includes a first delay circuit that applies a propagation delay to the timing signal or the lighting signal s1 to generate the lighting signal s2, and a second delay circuit that applies a propagation delay to the lighting signal s2 to generate the lighting signal s3. circuit.
- the lighting signals s2 and s3 can be output at appropriate timings.
- the timing signal can be used as it is, or it can be newly generated by the timing adjusting section 31a according to the input of the timing signal.
- the delay circuit two transistors (for example, FETs) connected in series between the power supply potential and the ground potential can be used, but the delay circuit is not necessarily limited to this.
- the timing adjusting section 31a starts counting in synchronization with a first change in the timing signal (for example, rising from L level to H level), and starts counting in synchronization with a second change in the timing signal (for example, from H level to L level). and a signal for generating lighting signals s1 to s3 (or lighting signals s2 and s3) based on the comparison between the count value of the counter circuit and the threshold value.
- a generator can be included.
- the counter circuit counts the output pulses of the oscillation circuit or counts the pulses of the reference clock.
- the signal generator compares the count value of the counter circuit with a preset first threshold value, and generates a lighting signal s2 when the count value exceeds the first threshold value.
- the signal generator compares the count value of the counter circuit with a preset second threshold value (larger than the first threshold value), and generates the lighting signal s3 when the count value exceeds the second threshold value.
- the lighting signal s1 is generated instantaneously from the rise of the timing signal, or the timing signal is used as the lighting signal s1.
- necessary signal processing such as voltage level adjustment may be performed.
- the drive section 31b generates drive signals s4 to s6 in response to the lighting signals s1 to s3 from the timing adjustment section 31a, and outputs the drive signals s4 to s6 to the light sources 21a to 21c. Similarly, the drive section 31b generates a drive signal s9 in response to the lighting signal s8 from the timing adjustment section 31a, and outputs the drive signal s9 to the light source 41 of the turn lamp.
- the driving signals s4 to s6 and s9 are, for example, current signals, and are supplied to the semiconductor light emitting elements (eg, LEDs or LDs) of the light sources 21a to 21c and 41, respectively.
- the drive signals s4-s6, s9 are not necessarily constant values, but may have values that are adjusted in response to PWM control.
- the time delay between the generation of the lighting signal and the start of lighting of the light source is negligible.
- a time delay between the start of lighting of the light source and the start of projection of the individual images is also assumed to be negligible. That is, the time delay between the generation of the lighting signal and the start of projection of the individual images is negligible. Therefore, the luminous intensity of the light sources 21a to 21c shown in FIG. 7 can be understood by replacing it with the level of the lighting signal or drive signal (for example, H level, L level), or the illuminance of the individual image projected on the road surface. .
- a timing signal such as a turn signal is input from the direction indicator 72 to the control unit 31 through or without the vehicle ECU 71 as a result of the operation of the direction indicator 72 by the driver.
- the control unit 31 turns on the light source 41 of the turn lamp 4c in synchronization with the input of the timing signal (the rising edge of the timing signal or the H level timing signal), and similarly, the light source of the projection unit 4d in synchronization with the input of the timing signal.
- 21a, 21b, and 21c are turned on in this order.
- the start of lighting of the light sources 21a, 21b, and 21c is controlled by the controller 31 as described above.
- the light source 21a of the projection unit 4d is controlled to light up earlier than the light source 41 of the turn lamp 4c, but this is not necessarily the case.
- an H level timing signal is input to the control unit 31 at time t1.
- the timing adjusting section 31a outputs the lighting signal s1 to the driving section 31b substantially at the same time as the time t1 (or very slightly delayed), and the driving section 31b outputs the driving signal s4 to the light source 21a.
- the light source 21a is turned on, and the individual image 5a is projected onto the road surface as shown in FIG. 3(a).
- the timing adjustment unit 31a outputs the lighting signal s8 to the driving unit 31b substantially at the same time as the time t1 (or with a slight delay), and the driving unit 31b outputs the driving signal s9 to the light source 41, causing the light source 41 to turn on. do.
- the peripheral circuit of the light source 41 and the drive signal s9 can be appropriately configured to sequentially light the turn lamps.
- the lighting start time of the light source 41 and the lighting start time of the light source 21a are simultaneous, but should not be limited to this.
- the image is projected on the road surface for a longer time than the turn lamp is turned on. more likely to
- the control unit 31 turns on the light source 21a immediately (for example, within 10 milliseconds, within 5 milliseconds, within 2.5 milliseconds, or within 0.5 milliseconds) from the time of input of the H level timing signal. It works so that it lights up. By turning on the light source 21a early, the period during which the individual image 5a alone is projected on the road surface can be lengthened. Just to make sure, the lighting signal s1 is generated sufficiently before the time t3 (generated at a time much closer to the time t1 than to the time t3).
- Time t3 is the time calculated by dividing the projection period (that is, P milliseconds) during which the image is projected onto the road surface by the number of individual images 5a to 5c (here, also equal to the number of light sources 21a to 21c). Elapsed time from t1 is shown.
- the timing adjustment unit 31a outputs the lighting signal s2 to the driving unit 31b at time t4, which is a time point after time t3, and the driving unit 31b outputs the driving signal s5 to the light source 21b, and the light source 21b is turned on.
- an individual image 5b is projected onto the road surface as shown in FIG. 3(b).
- two images are projected at a second time after a period of 250/3 milliseconds from the start of projection of the individual image 5a projected first among the three individual images 5a to 5c.
- the projection of the th projected individual image 5b is started. This makes it easier to obtain the visual effect of sequential individual image projection than when the projection of the second individual image is started at the first point in time.
- 3 can be represented by M and N as any natural number greater than or equal to 2
- 250 milliseconds by P milliseconds as any real number greater than or equal to 200 (eg, a real number in the range 250-500).
- the lighting signal s2 is generated before time t6 (that is, between time t3 and time t6), preferably at time t4 closer to time t3 than time t6.
- Time t6 is the time calculated by dividing the projection period of the image projected on the road surface (that is, P milliseconds) by the number of individual images 5a to 5c (here, also equal to the number of light sources 21a to 21c). Elapsed time from t3 is shown. When calculating the time t6 as the elapsed time from the time t1, it can be calculated by 2 ⁇ (P/N).
- the period during which the individual images 5a are projected alone becomes relatively longer than in the case of not doing so, and the sequential projection of the individual images enhances the visual perception. Easier to get the effect.
- time t4 is 5 milliseconds after time t3, or 10 milliseconds or later, or 20 milliseconds or later, or 30 milliseconds or later, or 40 milliseconds or later, or 45 milliseconds or later.
- time t4 is 70 milliseconds or earlier, or 65 milliseconds or earlier, 60 milliseconds or earlier, or 55 milliseconds or earlier from time t3.
- any numerical range can be determined based on the selection of numerical values listed in this paragraph.
- time t4 may be within 5-70 milliseconds from time t3. Thereby, a sufficient lighting period of the light source 21b can be secured.
- time t4 is within the range of 1.5 ⁇ (P/(N+1)) milliseconds to 2 ⁇ (P/(N+1)) milliseconds.
- the timing adjustment unit 31a outputs the lighting signal s3 to the driving unit 31b at time t6.5 (that is, the middle point of the projection period) after time t6, and the driving unit 31b outputs the driving signal s6 to the light source 21c.
- the light source 21c is turned on, and as a result, the individual image 5c is projected onto the road surface as shown in FIG. 3(c).
- the projection period of the two individual images 5a and 5b becomes relatively longer than otherwise, and sequential individual image projection is achieved. It becomes easier to obtain the visual effect of
- the turn-on signal s3 is generated before time t9 (i.e. the end of the projection period) (i.e. between times t6 and t9), preferably at time t6.5 closer to time t6 than time t9. generated.
- Time t9 is the time calculated by dividing the projection period of the image projected on the road surface (that is, P milliseconds) by the number of individual images 5a to 5c (here, also equal to the number of light sources 21a to 21c). Elapsed time from t6 is shown.
- time t9 corresponds to the second change (for example, fall) of the timing signal, and at this time, the light source 41 of the turn lamp and the light sources 21a to 21c of the projection device are all extinguished.
- a period from time t6.5 to time t9 is a full lighting period in which all of the light sources 21a to 21c are lit.
- Time t6.5 is calculated by dividing the time period between time t4 and time t9 by 2, but it is not necessarily limited to this. It is also possible to control so that the light sources 21b and 21c are turned on simultaneously at time t4.
- time t6.5 is 5 milliseconds after time t6, or 10 milliseconds or later, or 20 milliseconds or later, or 30 milliseconds or later, or 40 milliseconds or later, or 45 milliseconds or later.
- time t6.5 is 70 milliseconds before, or 65 milliseconds, 60 milliseconds or 55 milliseconds before time t6.
- any numerical range can be determined based on the selection of numerical values listed in this paragraph.
- time t6.5 may be within 5-70 milliseconds from time t6. Thereby, a sufficient lighting period of the light source 21c can be secured.
- the control unit 31 is configured not to output a lighting signal when the timing signal is at L level, so that both the light source 41 of the turn lamp and the light sources 21a to 21c of the projection unit 4d are turned off.
- the H level period and the L level period of the timing signal are substantially equal, that is, the projection period and the non-projection period are also substantially equal in length.
- the individual images and/or their collective overall image are shaped to suit the purpose of presenting the intent of the driver of the vehicle 1 to surrounding drivers and pedestrians and are limited to those shown. shouldn't.
- the individual images 5a to 5c are in a shape schematically showing the heads of arrows, in short, an inverted V shape.
- the overall image which consists of a set of individual images 5a-5c, shows a multistage inverted V pattern in which the inverted V-shaped individual images are arranged at intervals.
- the individual images 5b and 5c may be projected simultaneously (see FIGS. 9 and 10). Since the projection starts at the same time, the two individual images 5b and 5c are grasped as one individual image. Projection of the individual images 5b and 5c starts at time t5 after time t4.5, which is delayed by P/2 from time t1 at which projection of the individual image 5a is started. Compared to the case where the projection of the individual images 5b and 5c starts at time t4.5, the individual image 5a alone can be projected for a relatively long time, so that the visual effects of the sequential projection of the individual images can be obtained. easier. Although it is preferable that the projection start points of the three individual images onto the road surface are different for all the three individual images, this is not necessarily the case.
- FIG. 11 shows a mode in which the driving signals s4, s5, and s6 are PWM-controlled to gradually increase the luminous intensity of the light sources 21a, 21b, and 21c. It is also possible and within the scope of the present disclosure to control the light intensity of the light source in this way.
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Abstract
Description
少なくともP(Pは200以上の実数を示す)ミリ秒に亘る所定期間において、所定期間の開始時点から少なくともN個の個別像の路面への投影が所定の順番で開始され、所定期間の中間時点で少なくともN個の個別像の全てが路面に投影され、所定期間の終了時点で少なくともN個の個別像の路面への投影が終了するように少なくともM個の光源を制御する制御部を含む。制御部は、少なくともN個の個別像において1番目に投影される像の投影開始時点からP/Nミリ秒の期間が経過した第1時点よりも後の第2時点で少なくともN個の個別像において2番目に投影される像の投影が開始されるように少なくともM個の光源を制御するように構成される。
少なくともN個の個別像において1番目に投影される像の投影を開始し、
1番目の像の投影開始時点からP/Nミリ秒の期間が経過した第1時点よりも後の第2時点で少なくともN個の個別像において2番目に投影される像の投影を開始する。
5a :個別像
5b :個別像
5c :個別像
21 :光源
21a :光源
21b :光源
21c :光源
24 :集光レンズ
25 :パターン形成部材
27 :遮光部材
31 :制御部
31a :タイミング調整部
31b :駆動部
Claims (15)
- 少なくともM(Mは2以上の自然数を示す)個の光源を有し、前記少なくともM個の光源の点灯に基づいて少なくともN(Nは2以上の自然数を示す)個の個別像を所定方向に沿って路面上に投影する投影部と、
少なくともP(Pは200以上の実数を示す)ミリ秒に亘る所定期間において、前記所定期間の開始時点から前記少なくともN個の個別像の前記路面への投影が所定の順番で開始され、前記所定期間の中間時点で前記少なくともN個の個別像の全てが前記路面に投影され、前記所定期間の終了時点で前記少なくともN個の個別像の前記路面への投影が終了するように前記少なくともM個の光源を制御する制御部を備え、
前記制御部は、前記少なくともN個の個別像において1番目に投影される像の投影開始時点からP/Nミリ秒の期間が経過した第1時点よりも後の第2時点で前記少なくともN個の個別像において2番目に投影される像の投影が開始されるように前記少なくともM個の光源を制御するように構成されることを特徴とする車両用投影装置。 - 前記Nは、3又は4又は5の自然数を示し、
前記Pは、250~500の範囲内の実数を示すことを特徴とする請求項1に記載の車両用投影装置。 - 前記1番目に投影される像が単独で投影される期間は、前記Pミリ秒の35%~60%の範囲内であることを特徴とする請求項1に記載の車両用投影装置。
- 前記第2時点は、前記第1時点から2×(P/N)ミリ秒の期間が経過する第3時点よりも前記第1時点に近い時点であることを特徴とする請求項1に記載の車両用投影装置。
- 前記第2時点は、前記第1時点から5ミリ秒~70ミリ秒の範囲内の時点であることを特徴とする請求項1に記載の車両用投影装置。
- 前記第2時点は、1.5×(P/(N+1))ミリ秒~2×(P/(N+1))ミリ秒の範囲内の時点であることを特徴とする請求項1に記載の車両用投影装置。
- 前記所定期間の開始時点から前記中間時点までの時間間隔をQ(Qは実数を示す)ミリ秒とする時、(Q/P)≦0.8を満足することを特徴とする請求項1に記載の車両用投影装置。
- 前記Mにより示される自然数は、前記Nにより示される自然数に等しく、前記N個の個別像の前記路面への投影開始時点が前記N個の個別像の全てに関して異なることを特徴とする請求項1に記載の車両用投影装置。
- 前記所定方向は、車両から前方又は後方に離間する方向であることを特徴とする請求項1に記載の車両用投影装置。
- 前記制御部は、車両本体から伝達されるタイミング信号に応じて、前記少なくともN個の個別像の前記路面への投影のために前記少なくともM個の光源を制御する投影期間と、前記少なくともM個の光源の全てが消灯する非投影期間を繰り返すように前記少なくともM個の光源を制御するように構成され、前記所定期間が前記投影期間に等しいことを特徴とする請求項1に記載の車両用投影装置。
- 前記投影期間及び前記非投影期間が時間の長さにおいて等しいことを特徴とする請求項10に記載の車両用投影装置。
- 前記投影部は、前記少なくともM個の光源に対応して少なくともM個のレンズ部を有する第1レンズと、前記少なくともM個の光源の放射光を投影するための第2レンズと、前記第1レンズと前記第2レンズの間に設けられ、前記少なくともM個の光源に対応して少なくともM個の透光部が遮光部に設けられたパターン形成部材を備えることを特徴とする請求項1に記載の車両用投影装置。
- 前記投影部は、前記第1レンズと前記パターン形成部材の間で光チャンネルを光学的に区画するように設けられた少なくとも一つの遮光部材を更に備えることを特徴とする請求項12に記載の車両用投影装置。
- 請求項1に記載の車両用投影装置を備える車両用灯具。
- 少なくともM(Mは2以上の自然数を示す)個の光源を有し、前記少なくともM個の光源の点灯に基づいて少なくともN(Nは2以上の自然数を示す)個の個別像を所定方向に沿って路面上に投影する投影部と、
少なくともP(Pは200以上の実数を示す)ミリ秒に亘る所定期間において、前記所定期間の開始時点から前記少なくともN個の個別像の前記路面への投影が所定の順番で開始され、前記所定期間の中間時点で前記少なくともN個の個別像の全てが前記路面に投影され、前記所定期間の終了時点で前記少なくともN個の個別像の前記路面への投影が終了するように前記少なくともM個の光源を制御する制御部を備える車両用投影装置の動作方法であって、
前記少なくともN個の個別像において1番目に投影される像の投影を開始し、
前記1番目の像の投影開始時点からP/Nミリ秒の期間が経過した第1時点よりも後の第2時点で前記少なくともN個の個別像において2番目に投影される像の投影を開始する、車両用投影装置の動作方法。
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JP2016193689A (ja) | 2015-04-01 | 2016-11-17 | 株式会社小糸製作所 | 車両用描画装置 |
JP2020017488A (ja) | 2018-07-27 | 2020-01-30 | マクセル株式会社 | 路面映像投射装置及び車両用灯具 |
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JP2010211404A (ja) * | 2009-03-09 | 2010-09-24 | Denso Corp | 車載表示装置 |
JP2016049891A (ja) * | 2014-09-01 | 2016-04-11 | 三菱電機株式会社 | 車両用照射制御システムおよび光照射の制御方法 |
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