Projection device for vehicle

Abstract

The present disclosure relates to a projection device for a vehicle. The projection device for a vehicle, according to one embodiment of the present disclosure, comprises: an image generation device that outputs a projection image; an actuator that changes the direction of progression of the projection image outputted from the image generation device to output a partially overlapping projection image; and a signal processing device that outputs, to the image generation device, a compensation image signal that compensates for an overlapping area of the projection image outputted by the actuator. Accordingly, it is possible to output a clear projection image while increasing the resolution of the projection image.

Description

Vehicle projection device

[0001] The present disclosure relates to a vehicle projection device, and more particularly, to a vehicle projection device capable of outputting a clear projection image while increasing the resolution of the projection image.

[0002] A vehicle is a device that allows the user to move in the desired direction. A representative example is an automobile.

[0003] Meanwhile, for the convenience of vehicle users, a vehicle projector is installed inside the vehicle.

[0004] For example, there is a trend toward adopting head-up displays that output projection images onto the windshield or projecting images onto the vehicle's front lamps.

[0005] Meanwhile, Korean Patent Publication No. 10-2006-0101026, a prior art document, discloses a display device and method to which a resolution enhancement device is applied, which can effectively enhance the resolution of a projection display device.

[0006] In particular, the prior art discloses providing an improved resolution with the same number of pixels by using an input signal applying means for applying an input signal to an image displacement driving means to periodically display a different image on a screen and visually recognizing the same, thereby making it feel as if there are many pixels.

[0007] However, according to prior literature, when driving the movable member of a resolution enhancement device, it is difficult to create an ideal input signal, so there is a disadvantage in that image distortion occurs due to overshoot and rising time of the input signal.

[0008] The problem of the present disclosure is to provide a vehicle projection device capable of outputting a clear projection image while increasing the resolution of the projection image.

[0009] A vehicle projection device according to one embodiment of the present disclosure for achieving the above-described problem includes an image generating device for outputting a projection image, an actuator for changing the direction of projection from the image generating device to output a partially overlapping projection image, and a signal processing device for outputting a compensation image signal for compensating for an overlapping area of ​​the projection image by the actuator to the image generating device.

[0010] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator, and a signal processing device can output a compensation image signal that compensates for an overlapping area of ​​a projection image by the actuator to an image generating device based on the operation of the actuator.

[0011] Meanwhile, the signal processing device can output a reference signal for actuator driving that varies in response to actuator operation.

[0012] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator, and a signal processing device that calculates a resonance frequency based on the operation of the actuator and can vary a reference signal for driving the actuator based on the calculated resonance frequency.

[0013] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a temperature detection unit, and a signal processing device can calculate a resonance frequency based on the operation of the actuator and the temperature detected by the temperature detection unit, and vary a reference signal for driving the actuator based on the calculated resonance frequency.

[0014] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a timer, and a signal processing device can calculate a resonant frequency based on an operation of an actuator and an operation period of the actuator from the timer, and vary a reference signal for driving the actuator based on the calculated resonant frequency.

[0015] Meanwhile, the signal processing device can control the actuator to operate in response to a projection image of one color among the projection images of multiple colors when sequentially outputting projection images of multiple colors based on a vertical synchronization signal.

[0016] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator, and a signal processing device can output a compensation image signal that compensates for an overlapping area of ​​a projection image of a certain color by the actuator to an image generating device based on the operation of the actuator.

[0017] Meanwhile, the signal processing device can control the actuator to operate in response to the projection images of multiple colors when simultaneously outputting projection images of multiple colors based on a vertical synchronization signal.

[0018] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator, and a signal processing device can output a compensation image signal that compensates for an overlapping area of ​​a projection image by the actuator to an image generating device based on the operation of the actuator.

[0019] Meanwhile, the signal processing device can calculate a compensation luminance value of the first pixel using the luminance value of the first pixel within the overlapping area of ​​the projection image by the actuator and the luminance value of the second pixel adjacent to the first pixel, and output a compensation image signal based on the compensation luminance value of the first pixel to the image generating device.

[0020] Meanwhile, the signal processing device can increase the number of adjacent pixels when compensating pixels within an overlapping area of ​​a projection image by the actuator as the movement amount of the actuator increases, and output a compensation image signal based on the increased luminance value of the adjacent pixels and the luminance value of the pixels to the image generating device.

[0021] Meanwhile, a vehicle projection device according to another embodiment of the present disclosure includes an image generating device that outputs a projection image, an actuator that varies the direction of projection from the image generating device to output a partially overlapping projection image, a detection unit that detects the operation of the actuator, and a signal processing device that calculates a resonance frequency based on the operation of the actuator and varies a reference signal for driving the actuator based on the calculated resonance frequency.

[0022] Meanwhile, the signal processing device can output a compensation image signal that compensates for the overlapping area of ​​the projection image by the actuator to the image generating device based on the operation of the actuator.

[0023] A vehicle projection device according to one embodiment of the present disclosure includes an image generating device that outputs a projection image, an actuator that varies the direction of projection from the image generating device to output a partially overlapping projection image, and a signal processing device that outputs a compensation image signal that compensates for an overlapping area of ​​the projection image by the actuator to the image generating device. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0024] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator, and a signal processing device can output a compensation image signal that compensates for an overlapping area of ​​a projection image by the actuator to an image generating device based on the operation of the actuator. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0025] Meanwhile, the signal processing device can output a reference signal for actuator driving that varies in response to actuator operation. This allows for the output of a clear projection image while increasing the resolution of the projection image.

[0026] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator, and a signal processing device that calculates a resonance frequency based on the operation of the actuator and varies a reference signal for driving the actuator based on the calculated resonance frequency. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0027] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a temperature detection unit, and a signal processing device can calculate a resonance frequency based on the operation of the actuator and the temperature detected by the temperature detection unit, and vary a reference signal for driving the actuator based on the calculated resonance frequency. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0028] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a timer, and a signal processing device can calculate a resonance frequency based on the operation of the actuator and the operation period of the actuator from the timer, and vary a reference signal for driving the actuator based on the calculated resonance frequency. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0029] Meanwhile, the signal processing device can control the actuator to operate in response to a projection image of one color among the projection images of multiple colors when sequentially outputting projection images of multiple colors based on a vertical synchronization signal. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0030] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator, and a signal processing device can output a compensation image signal that compensates for an overlapping area of ​​a projection image of a certain color by the actuator to an image generating device based on the operation of the actuator. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0031] Meanwhile, the signal processing device can control the actuator to operate in response to the multi-color projection images when simultaneously outputting the multi-color projection images based on a vertical synchronization signal. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0032] Meanwhile, a vehicle projection device according to one embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator, and a signal processing device can output a compensation image signal that compensates for an overlapping area of ​​a projection image by the actuator to an image generating device based on the operation of the actuator. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0033] Meanwhile, the signal processing device can calculate a compensation luminance value of the first pixel using the luminance value of the first pixel within the overlapping area of ​​the projection image by the actuator and the luminance value of the second pixel adjacent to the first pixel, and output a compensation image signal based on the compensation luminance value of the first pixel to the image generating device. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0034] Meanwhile, the signal processing device can increase the number of adjacent pixels when compensating pixels within an overlapping area of ​​a projection image by the actuator as the movement amount of the actuator increases, and output a compensation image signal based on the increased luminance values ​​of the adjacent pixels and the luminance values ​​of the pixels to the image generating device. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0035] Meanwhile, a vehicle projection device according to another embodiment of the present disclosure includes an image generating device that outputs a projection image, an actuator that varies the direction of projection from the image generating device to output a partially overlapping projection image, a detection unit that detects the operation of the actuator, and a signal processing device that calculates a resonance frequency based on the operation of the actuator and varies a reference signal for driving the actuator based on the calculated resonance frequency. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0036] Meanwhile, the signal processing device can output a compensation image signal to the image generating device that compensates for the overlapping area of ​​the projection image by the actuator based on the operation of the actuator. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0037] Figure 1 is a drawing showing an example of the exterior and interior of a vehicle.

[0038] FIG. 2a is a drawing showing an example of the internal configuration of a vehicle projection device according to an embodiment of the present disclosure.

[0039] FIGS. 2b to 3b are drawings illustrating the internal configuration of a vehicle projection device according to various embodiments of the present disclosure.

[0040] Figures 4a to 6b are drawings referenced in the description of Figures 2a to 3b.

[0041] Hereinafter, the present disclosure will be described in more detail with reference to the drawings.

[0042] The suffixes "module" and "part" used in the following description are given solely for the convenience of writing this specification and do not impart any particularly significant meaning or role to the components themselves. Therefore, the terms "module" and "part" may be used interchangeably.

[0043] Figure 1 is a drawing showing an example of the exterior and interior of a vehicle.

[0044] Referring to the drawing, the vehicle (200) is operated by a plurality of wheels (103FR, 103FL, 103RL, etc.) that rotate by a power source and a steering wheel (150) for controlling the direction of travel of the vehicle (200).

[0045] Meanwhile, the vehicle (200) is equipped with a front left lamp (LPa) and a front right lamp (LPb) for projecting light to the front of the vehicle.

[0046] Meanwhile, the vehicle (200) may further be equipped with a camera (195) for capturing images of the front of the vehicle.

[0047] Meanwhile, the vehicle (200) may be equipped with multiple displays (180a, 180b, 180h) for displaying images, information, etc. inside.

[0048] For example, among the plurality of displays (180a, 180b, 180h), the first display (180a) may be a cluster display, the second display (180b) may be an AVN (Audio Video Navigation) display, and the third display (180h) may be a HUD display, which is a head-up display (HUD) in which an image is projected onto a predetermined area (Ara) spaced apart from the windshield (WS).

[0049] Meanwhile, the vehicle projection device (100 in FIG. 2a) according to the embodiment of the present disclosure can be applied to a front left lamp (LPa) or a front right lamp (LPb) or a head-up display (180h).

[0050] A vehicle projection device (100 in FIG. 2A) according to an embodiment of the present disclosure is a pixel shift-based projection device using an actuator, and includes an image generating device (300 in FIG. 2) that outputs a projection image, an actuator (325 in FIG. 2) that varies the direction of projection from the image generating device (300) to output a partially overlapping projection image, and a signal processing device (370 in FIG. 2) that compensates for an overlapping area (Ar in FIG. 2) of the projection image by the actuator (325). As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0051] Meanwhile, the vehicle (200) described in this specification may be a concept that includes all of a vehicle equipped with an engine as a power source, a hybrid vehicle equipped with an engine and an electric motor as a power source, and an electric vehicle equipped with an electric motor as a power source.

[0052] FIG. 2a is a drawing showing an example of the internal configuration of a vehicle projection device according to an embodiment of the present disclosure.

[0053] Referring to the drawings, a vehicle projection device (100) according to one embodiment of the present disclosure includes an image generating device (300) that outputs a projection image, an actuator (325) that varies the direction of projection from the image generating device (300) to output a partially overlapping projection image, and a signal processing device (370) that outputs a compensation image signal (Sc) that compensates for an overlapping area (Ara) of the projection image by the actuator (325) to the image generating device (300). As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0054] Meanwhile, the image generation device (300) may include a light source (not shown) and a digital mirror device (not shown) that reflects light output from the light source.

[0055] The light source may include an LED diode or a laser diode.

[0056] Meanwhile, the digital mirror device may include a plurality of digital mirrors. For example, it may include a digital micromirror device (DMD).

[0057] As another example, the image generating device (300) may include a light source (not shown) and a liquid crystal display panel (not shown) that outputs a projection image based on light output from the light source.

[0058] For example, the actuator (325) may include a coil (not shown) to which an electric signal is applied and a magnet (not shown).

[0059] Specifically, based on the electric signal applied to the coil, the actuator (325) rotates, and a pixel-shifted projection image can be output according to the rotation of the actuator (325).

[0060] As another example, the actuator (325) may include a MEMS scanner whose rotation angle is controlled based on an electrical signal.

[0061] Specifically, based on the electric signal applied to the coil, a scanner (not shown) within the actuator (325) rotates, and a pixel-shifted projection image can be output according to the rotation of the scanner (not shown).

[0062] A vehicle projection device (100) according to one embodiment of the present disclosure can output a first projection image (IGa) based on a first operation of an actuator (325) and a second projection image (IGb) based on a second operation of the actuator (325).

[0063] The second movement at this time may be a movement that rotates at a certain angle compared to the first movement.

[0064] Meanwhile, the first projection image (IGa) and the second projection image (IGb) may have an overlapping area (Ar) in pixel units.

[0065] Meanwhile, a vehicle projection device (100) according to one embodiment of the present disclosure may further include a focusing lens (345) for focusing the first projection image (IGa) and the second projection image (IGb) from the actuator (325).

[0066] Meanwhile, a vehicle projection device (100) according to one embodiment of the present disclosure further includes a detection unit (335) that detects the operation of an actuator (325).

[0067] Meanwhile, the signal processing device (370) can output a compensation image signal (Sc) that compensates for the overlapping area (Ar) of the projection image by the actuator (325) based on the operation of the actuator (325) to the image generating device (300).

[0068] Meanwhile, the signal processing device (370) can output a reference signal (Sd) for driving the actuator (325) that varies in response to the operation of the actuator (325).

[0069] Meanwhile, the signal processing device (370) can calculate the resonance frequency based on the operation of the actuator (325) and vary the reference signal (Sd) for driving the actuator (325) based on the calculated resonance frequency. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0070] Meanwhile, a vehicle projection device (100) according to another embodiment of the present disclosure includes an image generating device (300) that outputs a projection image, an actuator (325) that varies the direction of projection from the image generating device (300) to output a partially overlapping projection image, a detection unit (335) that detects the operation of the actuator (325), and a signal processing device (370) that calculates a resonance frequency based on the operation of the actuator (325) and varies a reference signal (Sd) for driving the actuator (325) based on the calculated resonance frequency. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0071] FIGS. 2b to 3b are drawings illustrating the internal configuration of a vehicle projection device according to various embodiments of the present disclosure.

[0072] FIG. 2b is a drawing showing the internal configuration of a vehicle projection device according to another embodiment of the present disclosure.

[0073] Referring to the drawings, a vehicle projection device (100b) according to another embodiment of the present disclosure includes, similarly to the vehicle projection device (100) of FIG. 2A, an image generating device (300) that outputs a projection image, an actuator (325) that varies the direction of projection from the image generating device (300) to output a partially overlapping projection image, a signal processing device (370), and a detection unit (335) that detects the operation of the actuator (325).

[0074] Meanwhile, a vehicle projection device (100b) according to another embodiment of the present disclosure may further include a temperature detection unit (374) for detecting the temperature of the vehicle projection device (100), unlike FIG. 2a.

[0075] Meanwhile, the signal processing device (370) can calculate the resonance frequency based on the operation of the actuator (325) and the temperature detected by the temperature detection unit (374), and can vary the reference signal (Sd) for driving the actuator (325) based on the calculated resonance frequency. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image by taking the detection temperature into consideration.

[0076] For example, the signal processing device (370) can calculate a second resonance frequency higher than the first resonance frequency corresponding to the set temperature range when the temperature detected by the temperature detection unit (374) is outside the set temperature range, specifically, when the temperature exceeds the set temperature range.

[0077] In addition, the signal processing device (370) can output a second reference signal (Sd) based on the calculated second resonant frequency to the actuator (325).

[0078] Meanwhile, a vehicle projection device (100b) according to another embodiment of the present disclosure may further include a timer (372) for calculating the operating time of the vehicle projection device (100), unlike FIG. 2a.

[0079] Meanwhile, the signal processing device (370) can calculate the resonance frequency based on the operation of the actuator (325) and the operation period of the actuator (325) from the timer (372), and can vary the reference signal (Sd) for driving the actuator (325) based on the calculated resonance frequency. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image by taking the operation period into consideration.

[0080] For example, the signal processing device (370) can calculate a third resonance frequency higher than the first resonance frequency corresponding to the set period when the operation period of the vehicle projection device (100b) exceeds the set period, specifically, when the operation period exceeds the set period, based on the timer (372).

[0081] In addition, the signal processing device (370) can output a third reference signal (Sd) based on the calculated third resonant frequency to the actuator (325).

[0082] FIG. 2c is a drawing showing an example of the internal configuration of a vehicle projection device according to another embodiment of the present disclosure.

[0083] Referring to the drawings, a vehicle projection device (100c) according to another embodiment of the present disclosure includes an image generating device (300) that outputs a projection image, an actuator (325) that varies the direction of projection from the image generating device (300) to output a partially overlapping projection image, a signal processing device (370) that outputs a compensation image signal (Sc) that compensates for an overlapping area (Ara) of the projection image by the actuator (325) to the image generating device (300), and a detection unit (336) that detects an operation waveform of the actuator (325). As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0084] Unlike the detection unit (335) in the vehicle projection device (100) of FIG. 2a, the detection unit (336) in the vehicle projection device (100c) can detect the operating waveform of the actuator (325).

[0085] Specifically, the detection unit (336) can detect a signal waveform applied to the actuator (325).

[0086] For example, the detection unit (336) can detect a reference signal (Sd) for driving the actuator (325).

[0087] Meanwhile, the signal processing device (370) can output a compensation image signal (Sc) that compensates for the overlapping area (Ar) of the projection image by the actuator (325) based on the operating waveform of the actuator (325) to the image generating device (300).

[0088] Meanwhile, the signal processing device (370) can output a reference signal (Sd) for driving the actuator (325) that varies in response to the operating waveform of the actuator (325).

[0089] Meanwhile, the signal processing device (370) can calculate the resonance frequency based on the operating waveform of the actuator (325) and vary the reference signal (Sd) for driving the actuator (325) based on the calculated resonance frequency. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0090] FIG. 2d is a drawing illustrating the internal configuration of a vehicle projection device according to another embodiment of the present disclosure.

[0091] Referring to the drawings, a vehicle projection device (100d) according to another embodiment of the present disclosure includes, similarly to the vehicle projection device (100c) of FIG. 2c, an image generating device (300) that outputs a projection image, an actuator (325) that varies the direction of projection from the image generating device (300) to output a partially overlapping projection image, a signal processing device (370), and a detection unit (336) that detects an operation waveform of the actuator (325).

[0092] Meanwhile, a vehicle projection device (100d) according to another embodiment of the present disclosure may further include a temperature detection unit (374) for detecting the temperature of the vehicle projection device (100c), unlike FIG. 2c.

[0093] Meanwhile, the signal processing device (370) can calculate the resonance frequency based on the operating waveform of the actuator (325) and the temperature detected by the temperature detection unit (374), and can vary the reference signal (Sd) for driving the actuator (325) based on the calculated resonance frequency. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image by taking the detection temperature into consideration.

[0094] Meanwhile, a vehicle projection device (100d) according to another embodiment of the present disclosure may further include a timer (372) for calculating the operating time of the vehicle projection device (100c), unlike FIG. 2c.

[0095] Meanwhile, the signal processing device (370) can calculate a resonance frequency based on the operating waveform of the actuator (325) and the operating period of the actuator (325) from the timer (372), and can vary the reference signal (Sd) for driving the actuator (325) based on the calculated resonance frequency. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image by taking the operating period into consideration.

[0096] Figures 4a to 6b are drawings referenced in the description of Figures 2a to 3b.

[0097] Figure 4a is a diagram illustrating a reference signal waveform and an actuator driving waveform.

[0098] Referring to the drawing, the signal processing device (370) can output a reference signal waveform (GRm) for driving the actuator (325).

[0099] The reference signal waveform (GRm) may repeat a first peak period (PTa), a first level maintenance period (PTb), a second peak period (PTc) having a level lower than the first peak, and a second level maintenance period (PTd) having a level lower than the first level.

[0100] Meanwhile, based on the reference signal waveform (GRm), the actual actuator driving waveform (GRn) can be illustrated as in (b) of Fig. 4a.

[0101] The actuator driving waveform (GRn) can repeat a first level maintenance period (PT1) and a second level maintenance period (PT2) lower than the first level.

[0102] FIG. 4b illustrates an example of a first projection image and a second projection image based on the reference signal waveform or actuator drive waveform of FIG. 4a.

[0103] Referring to the drawings, a vehicle projection device (100) according to one embodiment of the present disclosure can output a first projection image (IGa) based on a first operation of an actuator (325) and a second projection image (IGb) based on a second operation of the actuator (325).

[0104] Meanwhile, the first projection image (IGa) and the second projection image (IGb) may have an overlapping area (Ar) in pixel units.

[0105] Meanwhile, a detection unit (335), for example, a photo detector, can detect a first projection image (IGa) and a second projection image (IGb).

[0106] Alternatively, the detection unit (335), for example, a photo detector, can detect the first and second operations of the actuator (325).

[0107] FIG. 4c illustrates an example of multiple projection images based on the reference signal waveform or actuator drive waveform of FIG. 4a.

[0108] Referring to the drawings, a vehicle projection device (100) according to one embodiment of the present disclosure can output a first projection image (IGc), a second projection image based on a first operation of an actuator (325) based on the first projection image (IGc), a third projection image (IGd), and a fourth projection image based on a second operation of the actuator (325) based on the third projection image (IGd).

[0109] Meanwhile, the first to fourth projection images may have an overlapping area (Ar) in pixel units.

[0110] Meanwhile, a detection unit (335), for example, a photo detector, can detect the first to fourth projection images.

[0111] Alternatively, the detection unit (335), for example, a photo detector, can detect the first and second operations of the actuator (325).

[0112] Figure 4d is a drawing explaining the operation of an actuator based on a vertical synchronization signal.

[0113] Referring to the drawing, the signal processing device (370) can output a projection image based on a vertical synchronization signal (Vsync).

[0114] For example, the signal processing device (370) can sequentially output projection images of multiple colors (R, G, B) based on a vertical synchronization signal (Vsync).

[0115] In the drawing, it is exemplified that a red projection image is output during a TR period within a vertical synchronization signal (Vsync), a green projection image is output during a TG period, and a blue projection image is output during a TB period.

[0116] Meanwhile, the signal processing device (370) can control the actuator (325) to operate in response to a projection image of one color among the projection images of multiple colors when sequentially outputting projection images of multiple colors based on a vertical synchronization signal.

[0117] For example, the signal processing device (370) can control the actuator (325) to operate in response to a blue projection image among multiple color projection images.

[0118] Fig. 4d (a) illustrates a reference signal waveform (Sdr) for the operation of the actuator (325) corresponding to the blue projection image.

[0119] As shown in the drawing, at the time Tst, the reference signal waveform (Sdr) can rise from a low level to a high level, and accordingly, the actuator (325) operates at the time Tst.

[0120] For example, the actuator (325) may perform a first operation before the Tst time point and then perform a second operation of rotating partially at the Tst time point.

[0121] Accordingly, a superimposed image corresponding to the blue projection image among the multiple color projection images can be generated.

[0122] Meanwhile, the signal processing device (370) can output a compensation image signal (Sc) that compensates for the overlapping area (Ar) of a projection image of a certain color by the actuator (325) to the image generating device (300) based on the operation of the actuator (325).

[0123] Meanwhile, unlike the drawing, the signal processing device (370) can also be controlled to simultaneously output multiple color projection images based on a vertical synchronization signal.

[0124] Meanwhile, the signal processing device (370) can control the actuator (325) to operate in response to the projection images of multiple colors when simultaneously outputting projection images of multiple colors based on a vertical synchronization signal. This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0125] FIG. 5 is an example of an internal block diagram of the signal processing device of FIGS. 2a to 3b.

[0126] Referring to the drawing, the signal processing device (370) may be provided with an image generating unit (372), an image output unit (378), a resonance frequency calculating unit (374), and a reference signal output unit (375) that receive operation information or operation waveform information of the actuator (325) from the detection unit (335 or 336) and operate based on the operation information or operation waveform information of the actuator (325).

[0127] Meanwhile, the image generation unit (372) can generate a compensation image signal (Sc) that compensates for the overlapping area (Ar) of the projection image by the actuator (325) based on the operation information or operation waveform information of the actuator (325) from the detection unit (335 or 336).

[0128] And, the image output unit (378) can output a compensation image signal (Sc) to the image generation device (300).

[0129] Meanwhile, the resonance frequency calculation unit (374) can calculate the resonance frequency based on the operation information or operation waveform information of the actuator (325) from the detection unit (335 or 336).

[0130] Meanwhile, the resonance frequency calculation unit (374) can calculate the resonance frequency based on the operation of the actuator (325) and the temperature detected by the temperature detection unit (374).

[0131] Meanwhile, the resonance frequency calculation unit (374) can calculate the resonance frequency based on the operation of the actuator (325) and the operation period of the actuator (325) from the timer (372).

[0132] Meanwhile, the reference signal output unit (375) can output a variable reference signal (Sd) for driving the actuator (325) based on the calculated resonance frequency.

[0133] Fig. 6a illustrates an example of superimposition of projection images based on the operation of the actuator (325).

[0134] Referring to the drawing, the signal processing device (370) can control the actuator (325) to perform the first operation and the second operation.

[0135] Accordingly, as shown in (a) of Fig. 6a, the actuator (325) operates in a first operation mode and a second operation mode in which it rotates partially.

[0136] Meanwhile, the first operation mode and the second operation mode of the actuator (325) are operated by the reference signal (GRn) of (b) of Fig. 6a.

[0137] (c) of FIG. 6a illustrates a first projection image (IGa) based on a first operation of the actuator (325) and a second projection image (IGb) based on a second operation of the actuator (325).

[0138] The first projection image (IGa) and the second projection image (IGb) may overlap in some area (Ar).

[0139] Meanwhile, the signal processing device (370) can calculate a compensation luminance value of the first pixel (Pxa) using the luminance value of the first pixel (Pxa) in the overlapping area (Ar) of the second projection image (IGb) by the actuator (325) and the luminance value of the second pixel (Pxd) adjacent to the first pixel (Pxa), and output a compensation image signal (Sc) based on the compensation luminance value of the first pixel (Pxa) to the image generating device (300). As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

[0140] In the drawing, since a second projection image (IGb) that is diagonally shifted from the first projection image (IGa) is output, the second pixel (Pxd) adjacent to the first pixel (Pxa) may be a pixel adjacent in the diagonal direction of the first pixel (Pxa).

[0141] Fig. 6b illustrates an example of superimposition of projection images based on the operation of the actuator (325).

[0142] Referring to the drawing, the signal processing device (370) can control the actuator (325) to perform the first to fourth operations.

[0143] Accordingly, as shown in (a) of Fig. 6b, the actuator (325) operates in the first operation mode to the fourth operation mode by rotation.

[0144] Meanwhile, the first to fourth operation modes of the actuator (325) can be operated by the reference signals (GRa, GRb) of (b) of FIG. 6b.

[0145] For example, a first direction pixel movement can be performed by a first reference signal (GRa), and a second direction pixel movement different from the first direction can be performed by a second reference signal (GRb).

[0146] (c) of FIG. 6b illustrates a first projection image (IG1) based on the first operation of the actuator (325), a second projection image (IG2) moving in the first direction, a third projection image (IG3) moving in the second direction, and a fourth projection image (IG4) moving in the third direction.

[0147] Meanwhile, when the fourth projection image (IG4) moves in the third direction, the first projection image (IG1) can be output again.

[0148] Here, the first direction may be right, the second direction may be downward, the third direction may be left, and the fourth direction may be upward.

[0149] Meanwhile, the signal processing device (370) can calculate a compensation luminance value of the first pixel using the luminance value of the first pixel within the overlapping area of ​​the plurality of projection images (IG1 to IG4) by the actuator (325) and the luminance value of the second pixel adjacent to the first pixel, and output a compensation image signal based on the compensation luminance value of the first pixel to the image generating device (300). This makes it possible to output a clear projection image while increasing the resolution of the projection image.

[0150] Meanwhile, although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person having ordinary skill in the art to which the present invention pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. An image generating device that outputs a projected image; An actuator that changes the direction of projection of the image from the image generating device to output partially overlapping projection images; A vehicle projection device including a signal processing device that outputs a compensation image signal that compensates for the overlapping area of ​​the projection image by the actuator to the image generating device.

2. In paragraph 1, Further comprising a detection unit for detecting the operation of the actuator; The above signal processing device, A vehicle projection device that outputs a compensation image signal that compensates for an overlapping area of ​​the projection image by the actuator based on the operation of the actuator to the image generating device.

3. In paragraph 1, The above signal processing device, A vehicle projection device that outputs a reference signal for driving the actuator that is variable in response to the operation of the actuator.

4. In paragraph 1, Further comprising a detection unit for detecting the operation of the actuator; The above signal processing device, A vehicle projection device that calculates a resonant frequency based on the operation of the actuator and varies a reference signal for driving the actuator based on the calculated resonant frequency.

5. In paragraph 4, further comprising a temperature detection unit; The above signal processing device, A vehicle projection device that calculates the resonant frequency based on the operation of the actuator and the temperature detected by the temperature detection unit, and varies the reference signal for driving the actuator based on the calculated resonant frequency.

6. In paragraph 4, Including a timer; The above signal processing device, A vehicle projection device that calculates the resonant frequency based on the operation of the actuator and the operation period of the actuator from the timer, and varies the reference signal for driving the actuator based on the calculated resonant frequency.

7. In paragraph 1, The above signal processing device, A vehicle projection device that sequentially outputs projection images of multiple colors based on a vertical synchronization signal, and controls the actuator to operate in response to a projection image of any one color among the projection images of multiple colors.

8. In paragraph 7, Further comprising a detection unit for detecting the operation of the actuator; The above signal processing device, A vehicle projection device that outputs a compensation image signal that compensates for an overlapping area of ​​a projection image of a certain color by the actuator based on the operation of the actuator to the image generating device.

9. In paragraph 1, The above signal processing device, A vehicle projection device that controls the actuator to operate in response to the projection images of multiple colors when simultaneously outputting projection images of multiple colors based on a vertical synchronization signal.

10. In paragraph 9, Further comprising a detection unit for detecting the operation of the actuator; The above signal processing device, A vehicle projection device that outputs a compensation image signal that compensates for an overlapping area of ​​the projection image by the actuator based on the operation of the actuator to the image generating device.

11. In paragraph 1, The above signal processing device, A vehicle projection device that calculates a compensation luminance value of the first pixel by using the luminance value of the first pixel within the overlapping area of ​​the projection image by the actuator and the luminance value of the second pixel adjacent to the first pixel, and outputs a compensation image signal based on the compensation luminance value of the first pixel to the image generating device.

12. In paragraph 1, The above signal processing device, A vehicle projection device, wherein, as the movement amount of the actuator increases, the number of adjacent pixels is increased when compensating pixels within the overlapping area of ​​the projection image by the actuator, and a compensation image signal based on the increased luminance value of the adjacent pixels and the luminance value of the pixels is output to the image generating device.

13. Image generating device that outputs a projection image; An actuator that changes the direction of projection of the image from the image generating device to output partially overlapping projection images; A detection unit that detects the operation of the above actuator; A vehicle projection device comprising a signal processing device that calculates a resonant frequency based on the operation of the actuator and varies a reference signal for driving the actuator based on the calculated resonant frequency.

14. In paragraph 13, The above signal processing device, A vehicle projection device that outputs a compensation image signal that compensates for an overlapping area of ​​the projection image by the actuator based on the operation of the actuator to the image generating device.

Images