Multi-plane head-up display method for sports vehicles, associated device and motor vehicle.

Abstract

Method for controlling a multi-plane head-up display on a windshield (140) of a motor vehicle (100) comprising a projection device (120) and a propulsion motor (160), the method being implemented in the motor vehicle (100) while it is traveling in a direction of travel (dc1), and being characterized in that it comprises the following steps: Determination of a physical quantity,Determination of a focal length from the physical quantity,Control of a projection, by the projection device (120), of a graphic element (eg1), on the windshield (140), at the focal length, The physical quantity being; A torque resulting from a force generated by the propulsion motor (160), orAn acceleration of the motor vehicle (100) in the direction of travel (dc1). Figure for abstract: figure 1

Description

Title of the invention: Multi-plane head-up display method for sports vehicles, associated device and motor vehicle.

[0001] The invention relates to head-up displays in motor vehicles, particularly in sports vehicles.

[0002] On the one hand, it is known to display torque and horizontal accelerations (by a device called G-meters) in a motor vehicle. Such displays are available in certain commercial vehicles, for example on the BMW X2023 PLUG-IN HYBRID 5 (registered trademark) (in sports displays) or the Peugeot 3008 (registered trademark).

[0003] On the other hand, new projection devices are known which allow a multi-plane (or multi-plane) or, in other words, multi-depth head-up display. Several technologies, notably those described in the following article, in particular in the 2nd paragraph of the introduction, allow such a display: • Zhenlv Lv, Jingnan Li, Yan Yang, and Juan Liu “3D head-up display with a multiple extended depth of field based on integral imaging and holographic optical elements” Vol. 31, Issue 2, pp. 964-975 (2023).

[0004] The multi-plane display comprises projection, by a projection device at several focal lengths, each focal length defining a projection plane, so as to produce an impression of depth in the images projected onto the windshield.

[0005] There is a need to facilitate the interpretation by a driver of the display of torque and horizontal accelerations.

[0006] For this purpose, the invention relates to a method for controlling a multi-plane head-up display on a windshield of a motor vehicle comprising a projection device and a propulsion motor, the method being implemented in the motor vehicle, while it is moving, and being characterized in that it comprises the following steps: • Determination of a physical quantity, • Determination of a focal length from the physical quantity, • Command of a projection, by the projection device, of a graphic element (in other words: sending to the projection device a command of a projection of a graphic element, by the projection device), on the windshield, at the focal distance (in other words: with or according to the focal distance) (the command may include the graphic element and / or the distance focal length) (the method may further comprise this projection by the projection device), The physical quantity being; • A torque resulting from a (traction) force generated by the propulsion engine, and / or • An acceleration of the motor vehicle in a longitudinal direction of the motor vehicle.

[0007] Thus, thanks to the invention, the graphic element appears, to the driver of the motor vehicle, close or distant depending on the physical quantity, which facilitates the interpretation of the graphic element by the driver of the motor vehicle.

[0008] For example, the propulsion motor may be a combustion engine or an electric motor.

[0009] For example, the torque is a driving torque or a traction torque.

[0010] For example, the step of determining the physical quantity comprises receiving the physical quantity from a sensor of the motor vehicle.

[0011] For example, the torque may be received from a torque meter (in other words: a device torque measurement). An indirect determination is also possible, for example, from the rotational speed of the propulsion engine or from the accelerations of the motor vehicle, as described in the article: Metz, L. and Metz, L., "Deriving Wheel HP and Torque from Accelerometer Data," SAE Technical Paper 2000-01-3544, 2000.

[0012] The horizontal acceleration may be received from an accelerometer of the motor vehicle.

[0013] The horizontal acceleration can alternatively be determined: • From images received from a motor vehicle camera, or • From geographical locations of the motor vehicle.

[0014] According to one embodiment, the graphic element is representative of the physical quantity (in other words: obtained from the physical quantity).

[0015] Thus, the graphic element may comprise a number or a pattern representative of the physical quantity (in other words: can be obtained from the physical quantity) as is conventional in displays of torque and / or horizontal accelerations.

[0016] Alternatively, the graphic element is not representative of the physical quantity. Only the focal length then informs the driver about the physical quantity. A display on several (successive) planes is also possible to represent the physical quantity, in this case, for example.

[0017] According to one embodiment, the determination of the focal length from the physical quantity comprises a step of selecting the focal length from a plurality of focal lengths, from the physical quantity.

[0018] For example, each focal length of the plurality of focal lengths is associated, in a memory (for example, of the electronic device implementing the method according to the invention), with a minimum threshold and a maximum threshold (greater than the minimum threshold), the focal length being selected, during the selection step, if the physical quantity is between the minimum threshold associated with the focal length and the maximum threshold associated with the focal length (so that the focal length is a function of the physical quantity).

[0019] Alternatively, other methods, for example arithmetic, may be used to determine the focal length from the pitch angle.

[0020] According to one embodiment, the focal length is an increasing function of the physical quantity.

[0021] According to one embodiment: • The physical quantity is an acceleration (horizontal, in other words: parallel to the Earth's horizon) of the motor vehicle in the longitudinal direction of the motor vehicle, • The projection control controls a projection of the graphic element, at a position, on the windshield, located on one side of the windshield, (relative to the center of the windshield or more generally) relative to a reference location (on the windshield), towards which the motor vehicle accelerates, in a transverse direction of the motor vehicle.

[0022] According to one embodiment: • The physical quantity is an acceleration (horizontal, in other words: parallel to the Earth's horizon) of the motor vehicle in the longitudinal direction of the motor vehicle, • The projection control controls a projection of the graphic element, at a position, on the windshield, all the more eccentric, (relative to the center of the windshield or more generally) relative to a reference position, that an acceleration of the motor vehicle, in a transverse direction of the motor vehicle, is high.

[0023] The invention also relates to a computer program comprising instructions executable by a microprocessor or a microcontroller or a computer, for implementing the steps of the method according to the invention, when it is executed by the microprocessor or the microcontroller or the computer.

[0024] The method according to the invention can be implemented by an electronic device (or a motor vehicle). The invention therefore also relates to a device electronic device (or a motor vehicle) configured to implement the steps of the method according to the invention, as well as a motor vehicle comprising the electronic device.

[0025] The characteristics and advantages of the computer program, the electronic device, and the vehicle are identical to those of the method according to the invention (without it being necessary to repeat them here).

[0026] When the electronic device, motor vehicle, projection device (or other element) is "configured to" (or "capable of") performing or implementing a step or operation, this implies, for example, that the element comprises means for performing the step or operation. The means preferably comprise electronic means, for example a computer program, data in memory, specialized electronic circuits, wired or wireless connections, a microprocessor and / or a microcontroller.

[0027] Other characteristics and advantages of the present invention will appear more clearly on reading the detailed description which follows, comprising embodiments of the invention given as non-limiting examples and illustrated by the appended drawings, in which: • [Fig.l] represents an electronic device and a motor vehicle, according to an embodiment of the invention, in top view, • [Fig.2] represents an implementation of the method according to the invention, according to a example of embodiment, by the electronic device and the motor vehicle of [Fig.l].

[0028] In [Fig.l], certain elements are, of course, seen through transparency.

[0029] Detailed description of an exemplary embodiment of the invention, with reference to figures 1 and 2.

[0030] [Fig.l] shows a vehicle 100 which is a motor vehicle. The vehicle 100 includes a propulsion motor 160 (for example, an electric motor), a windshield 140 and a microprocessor 110. In addition, the microprocessor 110 is connected to the following elements of the vehicle 100: a torque meter 131 (or a torque measuring device 131), an accelerometer 132, and a headlight 120. The vehicle 100 travels on the roadway 200, propelled by the propulsion motor 160 driving wheels of the vehicle 100 via the powertrain 170 of the motor vehicle 100.

[0031] With reference to [Fig.2], in step S00, the microprocessor 110 receives, from the torque meter 131, the traction torque resulting from the drive of the traction chain 170 by the propulsion motor 160. This traction torque is for example equal to 450 Nm (Nm is the notation for newton meter). The microprocessor determines furthermore that this traction torque represents 90% of the maximum traction torque of the vehicle 100 equal to 500 Nm

[0032] In step S10, the microprocessor 110 receives, from the accelerometer 132, an acceleration in the dcl direction of 0.9 g (1 g = 9.81 meters per second squared) and an acceleration of 0.2 g in the dhl direction and the si direction.

[0033] In step S20, the microprocessor 110 determines a focal length fl (not shown) equal to the torque, as a percentage of the maximum torque, divided by 10. Thus, fl = 90 / 10 = 9 meters.

[0034] Alternatively, the distance fl is equal to the acceleration in the direction dcl, i.e. the longitudinal direction of the vehicle 100, multiplied by 10. Thus fl = 10 x 0.9 = 9 meters.

[0035] In step S30, the microprocessor 110 controls the projector 120 so that the projector 120 projects the graphic element egl onto the windshield 140 at a focal distance of 9 meters.

[0036] The graphic element egl includes the following information in text form; • Torque: 90% • Longitudinal acceleration: 0.9 g • Lateral acceleration: 0.2 g.

[0037] Alternatively, all or part of this information may be represented in the form of a dial with a point / needle or in the form of a gauge.

[0038] The graphic element is at position pl, 10 cm from the reference position pcO. If the lateral acceleration had been 0.4 g in the dhl direction and the si direction, then the graphic element would have been at the position pl 20 cm from the reference position pcO.

[0039] If the lateral acceleration had been 0.2 g in the dhl direction and the s2 direction, then the graphic element would have been at the position p2, 10 cm from the reference position pcO.

[0040] Alternatively, during step S30, the torque and the longitudinal and lateral accelerations may be displayed at different focal distances determined from their values.

Claims

Claims

1. Method for controlling a multi-plane head-up display on a windshield (140) of a motor vehicle (100) comprising a projection device (120) and a propulsion motor (160), the method being implemented in the motor vehicle (100) while it is moving, and being characterized in that it comprises the following steps: • Determination (S00, S10) of a physical quantity, • Determination (S20) of a focal distance from the physical quantity, • Control (S30) of a projection, by the projection device (120), of a graphic element (egl), on the windshield (140), at the focal distance, The physical quantity being; • A torque resulting from a force generated by the propulsion motor (160), or • An acceleration of the motor vehicle (100) in a longitudinal direction (dcl) of the motor vehicle (100).

2. Control method according to the preceding claim in which the step of determining the physical quantity comprises receiving the physical quantity from a sensor (131, 132) of the motor vehicle (100).

3. Control method according to any one of the preceding claims in which the graphic element (egl) is representative of the physical quantity.

4. A control method according to any preceding claim wherein the focal length is an increasing function of the physical quantity.

5. Control method according to any one of the preceding claims in which: • The physical quantity is an acceleration of the motor vehicle (100) in the longitudinal direction (dcl) of the motor vehicle (100), • The control (S30) of the projection controls a projection of the graphic element (egl), at a position (pO, pl, p2), on the windshield (140), located on one side of the windshield

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8.

9. breeze (140), relative to a reference position (pcO), towards which the motor vehicle (100) accelerates in a transverse direction (dhl) of the motor vehicle (100). Control method according to any one of the preceding claims wherein: • The physical quantity is an acceleration of the motor vehicle (100) in the longitudinal direction (dcl) of the motor vehicle (100), • The projection control controls a projection of the graphic element (egl), at a position (pO, pl, p2), on the windshield (140), all the more eccentric, relative to a reference position (pcO), as an acceleration of the motor vehicle (100), in a transverse direction (dhl) of the motor vehicle (100), is high. Computer program comprising instructions, executable by a microprocessor or a microcontroller, for implementing the method according to any one of claims 1 to 6, when executed by the microprocessor or the microcontroller. Electronic device (110) configured to implement the steps of the method according to any one of claims 1 to 6. Motor vehicle (100) comprising the electronic device (110) according to the preceding claim.

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