Projection device for vehicle

Abstract

The invention relates to a projection device for a vehicle. A projection device for a vehicle according to an embodiment of the present disclosure includes: an image generation device that outputs a projection image; an actuator that changes a traveling direction of the projection image from the image generation device and outputs a partially overlapped projection image; and a signal processing means that outputs, to the image generation means, a compensation image signal for compensating for an overlapping region of the projection image based on the actuator. As a result, it is possible to output a clear projection image while increasing the resolution of the projection image.

Description

Technical Field

[0001] This disclosure relates to a projection device for vehicles, and more specifically to a projection device for vehicles capable of outputting a clear projected image while increasing the resolution of the projected image. Background Technology

[0002] A vehicle is a device that moves in the direction desired by the user. A car is a prime example.

[0003] On the other hand, to facilitate users of the vehicle, a projection device is installed inside the vehicle.

[0004] For example, there is a trend toward using head-up displays that project images onto the windshield or onto vehicle headlights.

[0005] On the other hand, Korean Patent Publication No. 10-2006-0101026, which is prior art literature, discloses a display device and method that uses a resolution enhancement device in a projection-type display device to effectively improve the resolution.

[0006] In particular, in existing technical literature, an input signal application unit applies an input signal to an image displacement driving unit, causing different images to be displayed periodically on the screen. When visually recognizing the image, it is possible to perceive an increase in the number of pixels, thereby providing improved resolution with the same number of pixels.

[0007] However, according to existing technical literature, since it is difficult to generate an ideal input signal when the activation component of the resolution enhancement device is driven, there is a drawback that the image is distorted due to the overshoot and rise time of the input signal. Summary of the Invention

[0008] The problem the invention aims to solve

[0009] The problem to be solved by this disclosure is to provide a projection device for vehicles that can output clear projected images while increasing the resolution of the projected image.

[0010] means for solving problems

[0011] To achieve the above-mentioned objectives, one embodiment of the present disclosure of a vehicle projection device includes: an image generating apparatus that outputs a projected image; an actuator that changes the travel direction of the projected image from the image generating apparatus and outputs a partially overlapping projected image; and a signal processing apparatus that outputs a compensation image signal for compensating for overlapping regions based on the actuator's projected image to the image generating apparatus.

[0012] On the other hand, a vehicle projection device according to an embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator; the signal processing device can output a compensation image signal for compensating overlapping areas of the projected image based on the operation of the actuator to an image generation device.

[0013] On the other hand, the signal processing device can output a reference signal for driving the actuator, corresponding to the change in actuator action.

[0014] On the other hand, a vehicle projection device according to an embodiment of the present disclosure further includes a detection unit that detects the operation of an actuator; a signal processing device can calculate a resonant frequency based on the operation of the actuator and change a reference signal used to drive the actuator based on the calculated resonant frequency.

[0015] On the other hand, a vehicle projection device according to an embodiment of the present disclosure may further include a temperature detection unit; a signal processing unit calculates a resonant frequency based on the operation of the actuator and the temperature detected in the temperature detection unit, and changes a reference signal for driving the actuator based on the calculated resonant frequency.

[0016] On the other hand, a vehicle projection device according to an embodiment of the present disclosure may further include a timer; a signal processing device calculates a resonant frequency based on the operation of the actuator and the operation of the actuator from the timer, and changes a reference signal for driving the actuator based on the calculated resonant frequency.

[0017] On the other hand, the signal processing device can control the actuator so that, when the actuator sequentially outputs a plurality of projected images of a plurality of colors based on a vertical synchronization signal, it performs an action corresponding to any one of the projected images of a plurality of colors.

[0018] On the other hand, a vehicle projection device according to an embodiment of the present disclosure may further include a detection unit that detects the operation of an actuator; and a signal processing device that, based on the operation of the actuator, outputs a compensation image signal for compensating for overlapping areas of a projected image of any color based on the actuator to an image generation device.

[0019] On the other hand, the signal processing device can control the actuator so that the actuator performs an action corresponding to the multiple colors of the projected image when it simultaneously outputs multiple colors of the projected image based on the vertical synchronization signal.

[0020] On the other hand, a vehicle projection device according to an embodiment of the present disclosure may further include a detection unit that detects the operation of an actuator, and a signal processing device that outputs a compensation image signal for compensating overlapping areas of the projected image based on the operation of the actuator to an image generation device.

[0021] On the other hand, the signal processing device can use the brightness value of the first pixel in the overlapping area of ​​the projected image based on the actuator and the brightness value of the second pixel adjacent to the first pixel to calculate the compensation brightness value of the first pixel, and output the compensation image signal based on the compensation brightness value of the first pixel to the image generating device.

[0022] On the other hand, as the amount of movement of the actuator increases, when compensating for pixels in the overlapping area of ​​the projected image based on the actuator, the signal processing device increases the number of adjacent pixels and outputs the brightness values ​​of the increased adjacent pixels and the compensation image signal based on the brightness values ​​of the pixels to the image generating device.

[0023] On the other hand, another embodiment of the vehicle projection device disclosed herein includes: an image generating device that outputs a projected image; an actuator that changes the travel direction of the projected image from the image generating device and outputs a partially overlapping projected image; a detection unit that detects the operation of the actuator; and a signal processing device that calculates a resonant frequency based on the operation of the actuator and changes a reference signal for driving the actuator based on the calculated resonant frequency.

[0024] On the other hand, the signal processing device can output a compensation image signal to the image generating device to compensate for the overlapping area of ​​the actuator-based projected image, based on the action of the actuator.

[0025] Invention Effects

[0026] A vehicle projection device according to an embodiment of this disclosure includes: an image generating device that outputs a projected image; an actuator that changes the travel direction of the projected image from the image generating device and outputs a partially overlapping projected image; and a signal processing device that outputs a compensation image signal for compensating for overlapping areas of the projected images based on the actuator to the image generating device. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0027] On the other hand, a vehicle projection device according to an embodiment of this disclosure further includes a detection unit for detecting the movement of an actuator; the signal processing device outputs a compensation image signal for compensating for overlapping areas of the projected image based on the movement of the actuator to an image generation device. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0028] On the other hand, the signal processing device can output a reference signal for driving the actuator, corresponding to the change in actuator operation. Therefore, a clear projected image can be output while increasing the resolution of the projected image.

[0029] On the other hand, a vehicle projection device according to an embodiment of this disclosure may further include a detection unit for detecting the movement of an actuator; a signal processing device calculates a resonant frequency based on the movement of the actuator, and changes a reference signal used to drive the actuator based on the calculated resonant frequency. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0030] On the other hand, a vehicle projection device according to an embodiment of this disclosure may further include a temperature detection unit, and a signal processing unit calculates a resonant frequency based on the operation of the actuator and the temperature detected in the temperature detection unit, and changes a reference signal used to drive the actuator based on the calculated resonant frequency. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0031] On the other hand, a vehicle projection device according to an embodiment of this disclosure may further include a timer, a signal processing device calculating a resonant frequency based on the operation of the actuator and the period of actuator operation from the timer, and changing a reference signal used to drive the actuator based on the calculated resonant frequency. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0032] On the other hand, when multiple projected images of various colors are sequentially output based on a vertical synchronization signal, the signal processing device can control the actuator to operate accordingly for any one of the multiple projected images of different colors. This allows for the output of a clear projected image while increasing its resolution.

[0033] On the other hand, a vehicle projection device according to an embodiment of this disclosure may further include a detection unit for detecting the movement of an actuator, and a signal processing device outputs a compensation image signal to an image generating device for compensating for overlapping areas of a projected image based on any color of the actuator, based on the movement of the actuator. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0034] On the other hand, when simultaneously outputting projected images of multiple colors based on a vertical synchronization signal, the signal processing device can control the actuator to operate accordingly for the projected images of multiple colors. This allows for the output of a clear projected image while increasing its resolution.

[0035] On the other hand, a vehicle projection device according to an embodiment of this disclosure may further include a detection unit for detecting the movement of an actuator, and a signal processing device outputs a compensation image signal for compensating for overlapping areas of the projected image based on the movement of the actuator to an image generating device. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0036] On the other hand, the signal processing device can calculate the compensated brightness value of the first pixel using the brightness value of the first pixel within the overlapping region of the projected image generated by the actuator and the brightness value of the second pixel adjacent to the first pixel, and output the compensated image signal based on the compensated brightness value of the first pixel to the image generating device. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0037] On the other hand, as the actuator's movement increases, when compensating for pixels in the overlapping area of ​​the projected image based on the actuator, the signal processing device can increase the number of adjacent pixels and output the increased brightness values ​​of the adjacent pixels and the compensation image signal based on the pixel brightness values ​​to the image generating device. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0038] On the other hand, another embodiment of the vehicle projection device disclosed herein includes: an image generating device that outputs a projected image; an actuator that changes the travel direction of the projected image from the image generating device and outputs a partially overlapping projected image; a detection unit that detects the operation of the actuator; and a signal processing device that calculates a resonant frequency based on the operation of the actuator and changes a reference signal used to drive the actuator based on the calculated resonant frequency. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0039] On the other hand, the signal processing device can output a compensation image signal to the image generating device based on the actuator's operation, used to compensate for overlapping areas of the actuator-based projected image. This allows for the output of a clear projected image while increasing its resolution. Attached Figure Description

[0040] Figure 1 This is a diagram showing an example of the exterior and interior of a vehicle.

[0041] Figure 2a This is a diagram illustrating an example of the internal structure of a projection device for a vehicle according to an embodiment of the present disclosure.

[0042] Figures 2b to 3b This is a diagram illustrating the internal structure of a projection device for a vehicle according to various embodiments of the present disclosure.

[0043] Figures 4a to 6b Is Figures 2a to 3b The diagram referenced in the description. Detailed Implementation

[0044] The present disclosure will now be described in more detail with reference to the accompanying drawings.

[0045] The suffixes "module" and "section" used for the constituent elements in the following description are assigned only for ease of writing and do not inherently possess any particularly important meaning or function. Therefore, the terms "module" and "section" can be used interchangeably.

[0046] Figure 1 This is a diagram showing an example of the exterior and interior of a vehicle.

[0047] Referring to the accompanying drawings, the vehicle 200 is operated by a plurality of wheels (103FR, 103FL, 103RL, ...) that rotate using a power source, and by a steering wheel 150 for adjusting the driving direction of the vehicle 200.

[0048] On the other hand, vehicle 200 has a front left lamp LPa and a front right lamp LPb for lighting projection in front of the vehicle.

[0049] On the other hand, the vehicle 200 may also have a camera 195 for acquiring images of the front of the vehicle.

[0050] On the other hand, the vehicle 200 may have a plurality of displays 180a, 180b, 180h inside for displaying images, information, etc.

[0051] For example, among a plurality of displays 180a, 180b, and 180h, the first display 180a may be an instrument panel display, the second display 180b may be an AVN (Audio Video Navigation) display, and the third display 180h may be a HUD display that projects an image onto a defined area Ara of the windshield (WS).

[0052] On the other hand, the vehicle projection device of the present disclosure embodiment ( Figure 2a (100) can be applied to the front left light LPa or the front right light LPa or the head-up display 180h.

[0053] The vehicle projection device of this disclosure embodiment ( Figure 2a Image generator 300 (Fig. 100) is a projection device based on pixel shift using an actuator, comprising: an image generation device (Fig. 300) that outputs a projected image; an actuator (Fig. 325) that changes the travel direction of the projected image from the image generation device 300 to output a partially overlapping projected image; and a signal processing device (Fig. 370) that compensates for the overlapping region (Ar) of the projected image based on the actuator 325. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0054] On the other hand, the vehicle 200 described in this specification can be a concept encompassing all types of vehicles, including vehicles with an engine as a power source, hybrid vehicles with an engine and an electric motor as power sources, and electric vehicles with an electric motor as a power source.

[0055] Figure 2a This is a diagram illustrating an example of the internal structure of a projection device for a vehicle according to an embodiment of the present disclosure.

[0056] Referring to the accompanying drawings, a vehicle projection device 100 according to an embodiment of this disclosure includes: an image generating device 300 that outputs a projected image; an actuator 325 that changes the travel direction of the projected image from the image generating device 300 and outputs a partially overlapping projected image; and a signal processing device 370 that outputs a compensation image signal Sc, which compensates for the overlapping region Ara of the projected image based on the actuator 325, to the image generating device 300. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0057] On the other hand, the image generating apparatus 300 may include a light source (not shown) and a digital mirror device (not shown) that reflects the light output from the light source.

[0058] The light source can include LED diodes or laser diodes, etc.

[0059] On the other hand, a digital mirror device can have a plurality of digital mirrors. For example, it can have a digital micromirror device (DMD).

[0060] As another example, the image generating apparatus 300 may include a light source (not shown) and a liquid crystal display panel (not shown), which outputs a projected image based on light emitted from the light source.

[0061] For example, actuator 325 may have a coil (not shown) for applying an electrical signal and a magnet (not shown).

[0062] Specifically, the actuator 325 rotates based on an electrical signal applied to the coil, and as the actuator 325 rotates, it can output a projected image of pixel displacement.

[0063] As another example, actuator 325 may have a microelectromechanical system (MEMS) scanner that adjusts the rotation angle based on electrical signals.

[0064] Specifically, based on the electrical signal applied to the coil, the scanner (not shown) inside the actuator 325 rotates, and as the scanner (not shown) rotates, a projected image of pixel displacement can be output.

[0065] A vehicle projection device 100 according to an embodiment of the present disclosure can output a first projection image IGa based on a first action of an actuator 325 and a second projection image IGb based on a second action of an actuator 325.

[0066] The second action at this point can be a rotation by a specified angle relative to the first action.

[0067] On the other hand, the first projected image IGa and the second projected image IGb can generate an overlapping region Ar in pixels.

[0068] On the other hand, the vehicle projection device 100 of one embodiment of the present disclosure may also have a focusing lens 345 for converging light from the first projection image IGa and the second projection image IGB from the actuator 325.

[0069] On the other hand, a vehicle projection device 100 according to an embodiment of the present disclosure also includes a detection unit 335 for detecting the operation of the actuator 325.

[0070] On the other hand, the signal processing device 370 can output a compensation image signal Sc, which compensates for the overlapping region Ar of the projected image based on the actuator 325, to the image generating device 300 based on the operation of the actuator 325.

[0071] On the other hand, the signal processing device 370 can output a reference signal Sd for driving the actuator 325, which corresponds to the change in the operation of the actuator 325.

[0072] On the other hand, the signal processing device 370 can calculate the resonant frequency based on the operation of the actuator 325, and change the reference signal Sd used to drive the actuator 325 based on the calculated resonant frequency. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0073] On the other hand, another embodiment of the vehicle projection device 100 disclosed herein includes: an image generating device 300 that outputs a projected image; an actuator 325 that changes the travel direction of the projected image from the image generating device 300 and outputs a partially overlapping projected image; a detection unit 335 that detects the operation of the actuator 325; and a signal processing unit 370 that calculates a resonant frequency based on the operation of the actuator 325 and changes a reference signal Sd used to drive the actuator 325 based on the calculated resonant frequency. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0074] Figures 2b to 3b This is a diagram illustrating the internal structure of a projection device for a vehicle according to various embodiments of the present disclosure.

[0075] Figure 2bThis is a diagram illustrating the internal structure of a projection device for a vehicle according to another embodiment of the present disclosure.

[0076] Referring to the accompanying drawings, another embodiment of the vehicle projection device 100b of this disclosure and Figure 2a Similarly, the vehicle projection device 100 includes: an image generating device 300 that outputs a projected image; an actuator 325 that changes the travel direction of the projected image from the image generating device 300 and outputs a partially overlapping projected image; a signal processing device 370; and a detection unit 335 that detects the operation of the actuator 325.

[0077] On the other hand, with Figure 2a In a different embodiment of the present disclosure, the vehicle projection device 100b may further include a temperature detection unit 374 for detecting the temperature of the vehicle projection device 100.

[0078] On the other hand, the signal processing device 370 can calculate the resonant frequency based on the operation of the actuator 325 and the temperature detected in the temperature detection unit 374, and change the reference signal Sd used to drive the actuator 325 based on the calculated resonant frequency. Thus, taking the detected temperature into account, a clear projected image can be output while increasing the resolution of the projected image.

[0079] For example, if the temperature detected by the signal processing device 370 in the temperature detection unit 374 exceeds the set temperature range, specifically, if the temperature exceeds the set temperature range, a second resonant frequency greater than the first resonant frequency corresponding to the set temperature range can be calculated.

[0080] Furthermore, the signal processing device 370 can output a second reference signal Sd based on the calculated second resonant frequency to the actuator 325.

[0081] On the other hand, with Figure 2a In a different embodiment of the present disclosure, the vehicle projection device 100b may further include a timer 372 for calculating the operating time of the vehicle projection device 100.

[0082] On the other hand, the signal processing device 370 can calculate the resonant frequency based on the operation of the actuator 325 and the operation of the actuator 325 from the timer 372, and change the reference signal Sd used to drive the actuator 325 based on the calculated resonant frequency. Thus, taking into account the operation period, a clear projected image can be output while increasing the resolution of the projected image.

[0083] For example, the signal processing device 370 may calculate a third resonant frequency that is greater than the first resonant frequency corresponding to the set period, based on the timer 372 when the operation period of the vehicle projection device 100b exceeds a set period. Specifically, when the set period is exceeded, the signal processing device 370 may calculate a third resonant frequency that is greater than the first resonant frequency corresponding to the set period.

[0084] 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.

[0085] Figure 2c is a diagram illustrating an example of the internal structure of a projection device for a vehicle according to another embodiment of the present disclosure.

[0086] Referring to the accompanying drawings, another embodiment of the vehicle projection device 100c of this disclosure includes: an image generating device 300 that outputs a projected image; an actuator 325 that changes the travel direction of the projected image from the image generating device 300 and outputs a partially overlapping projected image; a signal processing device 370 that outputs a compensation image signal Sc, which compensates for the overlapping region Ara of the projected image based on the actuator 325, to the image generating device 300; and a detection unit 336 that detects the operation waveform of the actuator 325. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0087] and Figure 2a Unlike the detection unit 335 in the vehicle projection device 100, the detection unit 336 in the vehicle projection device 100c can detect the operating waveform of the actuator 325.

[0088] Specifically, the detection unit 336 can detect the signal waveform applied to the actuator 325.

[0089] For example, the detection unit 336 can detect the reference signal Sd used to drive the actuator 325.

[0090] On the other hand, the signal processing device 370 can output a compensation image signal Sc, which compensates for the overlapping region (Ar) of the projected image based on the actuator 325, to the image generating device 300 based on the action waveform of the actuator 325.

[0091] On the other hand, the signal processing device 370 can output a reference signal Sd for driving the actuator 325, which corresponds to the change in the waveform of the actuator 325's operation.

[0092] On the other hand, the signal processing device 370 can calculate the resonant frequency based on the operating waveform of the actuator 325, and change the reference signal Sd used to drive the actuator 325 based on the calculated resonant frequency. This allows for the output of a clear projected image while increasing the resolution of the projected image.

[0093] Figure 2d is a diagram showing the internal structure of a projection device for a vehicle according to another embodiment of the present disclosure.

[0094] Referring to the accompanying drawings, another embodiment of the vehicle projection device 100d of this disclosure is similar to the vehicle projection device 100c of FIG2c, including: an image generating device 300 that outputs a projected image; an actuator 325 that changes the travel direction of the projected image from the image generating device 300 and outputs a partially overlapping projected image; a signal processing device 370; and a detection unit 336 that detects the operating waveform of the actuator 325.

[0095] On the other hand, unlike FIG2c, 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.

[0096] On the other hand, the signal processing device 370 can calculate the resonant frequency based on the operating waveform of the actuator 325 and the temperature detected in the temperature detection unit 374, and change the reference signal Sd used to drive the actuator 325 based on the calculated resonant frequency. Therefore, taking the detected temperature into account, a clear projected image can be output while increasing the resolution of the projected image.

[0097] On the other hand, unlike FIG2c, 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.

[0098] On the other hand, the signal processing device 370 can calculate the resonant frequency based on the operating waveform of the actuator 325 and the operating period of the actuator 325 from the timer 372, and change the reference signal Sd used to drive the actuator 325 based on the calculated resonant frequency. Thus, taking into account the operating period, a clear projected image can be output while increasing the resolution of the projected image.

[0099] Figures 4a to 6b Is Figures 2a to 3b The diagram referenced in the description.

[0100] Figure 4a This is a diagram illustrating the reference signal waveform and the actuator drive waveform.

[0101] Referring to the accompanying drawings, the signal processing device 370 can output a reference signal waveform GRm for driving the actuator 325.

[0102] In the reference signal waveform GRm, the first peak interval PTa, the first level holding interval PTb, the second peak interval PTc (which is lower than the first peak level), and the second level holding interval PTd (which is lower than the first level) can be repeated.

[0103] On the other hand, based on the reference signal waveform GRm, the actual actuator drive waveform GRn can be as follows: Figure 4a As shown in (b).

[0104] In the actuator drive waveform GRn, the first level holding interval PT1 and the second level holding interval PT2, which is lower than the first level, can be repeated.

[0105] Figure 4b Example based on Figure 4a An example of a first and second projection image of a reference signal waveform or an actuator drive waveform.

[0106] Referring to the accompanying drawings, a vehicle projection device 100 according to an embodiment of the present disclosure can output a first projection image IGa based on a first action of an actuator 325 and a second projection image IGb based on a second action of an actuator 325.

[0107] On the other hand, the first projected image IGa and the second projected image IGb can generate an overlapping region Ar in pixels.

[0108] On the other hand, the detection unit 335 (e.g., a photodetector) can detect the first projection image IGa and the second projection image IGBb.

[0109] Alternatively, the detection unit 335 (e.g., a photodetector) can detect the first and second actions of the actuator 325.

[0110] Figure 4c Example based on Figure 4a An example of multiple projected images of a reference signal waveform or an actuator drive waveform.

[0111] Referring to the accompanying drawings, a vehicle projection device 100 according to an embodiment of the present disclosure can output a first projection image IGc, a second projection image corresponding to a first action of an actuator 325 based on the first projection image IGc, a third projection image IGd, and a fourth projection image corresponding to a second action of an actuator 325 based on the third projection image IGd.

[0112] On the other hand, the first to fourth projected images can generate an overlapping region Ar in pixels.

[0113] On the other hand, the detection unit 335, for example a photodetector, can detect the first to the fourth projected images.

[0114] Alternatively, the detection unit 335, for example a photodetector, can detect the first and second actions of the actuator 325.

[0115] Figure 4d This is a diagram illustrating the operation of an actuator based on a vertical synchronization signal.

[0116] Referring to the accompanying drawings, the signal processing device 370 can output a projected image based on the vertical synchronization signal Vsync.

[0117] For example, the signal processing device 370 can sequentially output a plurality of projected images of colors R, G, and B based on the vertical synchronization signal Vsync.

[0118] In the accompanying drawings, a red projected image is shown during the TR period of the vertical synchronization signal Vsync, a green projected image is shown during the TG period, and a blue projected image is shown during the TB period.

[0119] On the other hand, when multiple colors of projected images are output sequentially based on the vertical synchronization signal, the signal processing device 370 can control the actuator 325 to perform an action corresponding to any one of the multiple colors of the projected images.

[0120] For example, the signal processing device 370 can control the actuator 325 to perform an action corresponding to the blue projection image in a plurality of color projection images.

[0121] Figure 4d Example (a) shows the reference signal waveform Sdr for the action of actuator 325, corresponding to the blue projected image.

[0122] As shown in the figure, at time Tst, the reference signal waveform Sdr can rise from a low level to a high level, thus the actuator 325 operates at time Tst.

[0123] For example, actuator 325 can perform a first action before time Tst, and then perform a second action of partial rotation at time Tst.

[0124] Therefore, it is possible to generate an overlapping image corresponding to the blue projection image among multiple colored projection images.

[0125] On the other hand, the signal processing device 370 can output a compensation image signal Sc, which compensates for the overlapping region Ar of the projected image based on any color of the actuator 325, to the image generating device 300 based on the operation of the actuator 325.

[0126] On the other hand, unlike the attached figure, the signal processing device 370 can also be controlled to simultaneously output a projection image of multiple colors based on the vertical synchronization signal.

[0127] On the other hand, when simultaneously outputting multiple colors of projected images based on a vertical synchronization signal, the signal processing device 370 can control the actuator 325 to operate in accordance with the multiple colors of the projected images. This allows for the output of a clear projected image while increasing its resolution.

[0128] Figure 5 yes Figures 2a to 3bAn example of an internal block diagram of a signal processing device.

[0129] Referring to the accompanying drawings, the signal processing device 370 may include an image generation unit 372, an image output unit 378, a resonant frequency calculation unit 374, and a reference signal output unit 375. The image generation unit 372 receives motion information or motion waveform information of the actuator 325 from the detection unit (335 or 336) and performs actions based on the motion information or motion waveform information of the actuator 325.

[0130] On the other hand, the image generation unit 372 can generate a compensation image signal Sc to compensate for the overlapping region Ar of the projected image based on the actuator 325, based on the motion information or motion waveform information from the actuator 325 of the detection unit (335 or 336).

[0131] In addition, the image output unit 378 can output the image compensation signal Sc to the image generating device 300.

[0132] On the other hand, the resonant frequency calculation unit 374 can calculate the resonant frequency based on the operation information or operation waveform information of the actuator 325 from the detection unit (335 or 336).

[0133] On the other hand, the resonant frequency calculation unit 374 can calculate the resonant frequency based on the operation of the actuator 325 and the temperature detected in the temperature detection unit 374.

[0134] On the other hand, the resonant frequency calculation unit 374 can calculate the resonant frequency based on the operation of the actuator 325 and the operation period of the actuator 325 from the timer 372.

[0135] On the other hand, the reference signal output unit 375 can change the reference signal Sd used to drive the actuator 325 based on the calculated resonant frequency and output it.

[0136] Figure 6a An example of projected image overlay based on the action of actuator 325 is shown.

[0137] Referring to the accompanying drawings, the signal processing device 370 can control the actuator 325 to perform a first action and a second action.

[0138] Therefore, as Figure 6a As shown in (a), actuator 325 operates in a first operating mode and a second operating mode of partial rotation.

[0139] On the other hand, the first and second operating modes of the actuator 325 are based on Figure 6a The reference signal GRn of (b) is activated.

[0140] Figure 6a(c) illustrates a first projection image IGa based on a first action of actuator 325 and a second projection image IGb based on a second action of actuator 325.

[0141] In the first projection image IGa and the second projection image IGb, some regions Ar can overlap.

[0142] On the other hand, the signal processing device 370 can calculate the compensated brightness value of the first pixel Pxa using the brightness value of the first pixel Pxa within the overlapping region Ar of the second projected image IGb based on the actuator 325 and the brightness value of the second pixel Pxd adjacent to the first pixel Pxa, and output the compensated image signal Sc based on the compensated brightness value of the first pixel Pxa to the image generating device 300. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0143] In the accompanying drawings, since the output is a second projected image IGb that is diagonally shifted relative to the first projected image IGa, the second pixel Pxd that is adjacent to the first pixel Pxa can be a pixel that is diagonally adjacent to the first pixel Pxa.

[0144] Figure 6b An example of projected image overlay based on the action of actuator 325 is shown.

[0145] Referring to the accompanying drawings, the signal processing device 370 can control the actuator 325 to perform the first to fourth actions.

[0146] Therefore, as Figure 6b As shown in (a), actuator 325 operates by rotation in a first operating mode to a fourth operating mode.

[0147] On the other hand, the first to fourth operating modes of the actuator 325 can be determined according to... Figure 6b The reference signals GRa and GRb of (b) are activated.

[0148] For example, a first-direction pixel movement can be performed based on a first reference signal GRa, and a second-direction pixel movement, different from the first direction, can be performed based on a second reference signal GRb.

[0149] Figure 6b Example (c) illustrates a first projected image IG1 for a first action based on actuator 325, a second projected image IG2 for movement in a first direction, a third projected image IG3 for movement in a second direction, and a fourth projected image IG4 for movement in a third direction.

[0150] On the other hand, if the fourth projected image IG4 moves in the third direction, the first projected image IG1 can be output again.

[0151] Here, the first direction can be the right direction, the second direction can be the down direction, the third direction can be the left direction, and the fourth direction can be the up direction.

[0152] On the other hand, the signal processing device 370 can calculate the compensated brightness value of the first pixel using the brightness value of the first pixel within the overlapping area of ​​the plurality of projected images IG1~IG4 based on the actuator 325 and the brightness value of the second pixel adjacent to the first pixel, and output the compensated image signal based on the compensated brightness value of the first pixel to the image generating device 300. Thus, a clear projected image can be output while increasing the resolution of the projected image.

[0153] On the other hand, while the preferred embodiments of this disclosure have been shown and described above, this disclosure is not limited to the specific embodiments described above. Various modifications can be made by those skilled in the art without departing from the spirit of this disclosure as claimed in the claims, and such modifications should not be construed as departing from the technical concept or prospect of this disclosure.

Claims

1. A projection device for a vehicle, wherein, include: Image generating device, outputs projected image; An actuator changes the direction of travel of the projected image from the image generation device and outputs a partially overlapping projected image; as well as The signal processing device outputs a compensation image signal to the image generating device for compensating for overlapping areas of the projected image based on the actuator.

2. The projection device for vehicles according to claim 1, wherein, It also includes a detection unit that detects the action of the actuator; Based on the action of the actuator, the signal processing device outputs a compensation image signal to the image generating device for compensating for overlapping areas of the projected image based on the actuator.

3. The projection device for vehicles according to claim 1, wherein, The signal processing device outputs a reference signal for driving the actuator, corresponding to the change in the actuator's action.

4. The projection device for vehicles according to claim 1, wherein, It also includes a detection unit that detects the action of the actuator; The signal processing device calculates the resonant frequency based on the action of the actuator, and changes the reference signal used to drive the actuator based on the calculated resonant frequency.

5. The projection device for vehicles according to claim 4, wherein, It also includes a temperature detection unit; The signal processing device calculates the resonant frequency based on the operation of the actuator and the temperature detected in the temperature detection unit, and changes the reference signal used to drive the actuator based on the calculated resonant frequency.

6. The projection device for vehicles according to claim 4, wherein, It also includes timers; The signal processing device calculates the resonant frequency based on the operation of the actuator and the operation of the actuator from the timer, and changes the reference signal used to drive the actuator based on the calculated resonant frequency.

7. The projection device for vehicles according to claim 1, wherein, The signal processing device controls the actuator so that, when the actuator sequentially outputs a plurality of projected images of a plurality of colors based on a vertical synchronization signal, it performs an action corresponding to any one of the projected images of a plurality of colors.

8. The projection device for a vehicle according to claim 7, wherein, It also includes a detection unit that detects the action of the actuator; Based on the action of the actuator, the signal processing device outputs a compensation image signal to the image generating device to compensate for overlapping areas of the projected image based on any color of the actuator.

9. The projection device for vehicles according to claim 1, wherein, The signal processing device controls the actuator so that, when the actuator simultaneously outputs a plurality of projected images of multiple colors based on a vertical synchronization signal, it performs an action corresponding to the plurality of projected images of multiple colors.

10. The projection device for a vehicle according to claim 9, wherein, It also includes a detection unit that detects the action of the actuator; Based on the action of the actuator, the signal processing device outputs a compensation image signal to the image generating device for compensating for overlapping areas of the projected image based on the actuator.

11. The projection device for a vehicle according to claim 1, wherein, The signal processing device calculates a compensated brightness value for the first pixel using the brightness value of a first pixel within the overlapping region of the projected image based on the actuator and the brightness value of a second pixel adjacent to the first pixel, and outputs a compensated image signal based on the compensated brightness value of the first pixel to the image generating device.

12. The projection device for a vehicle according to claim 1, wherein, As the movement of the actuator increases, when compensating for pixels in the overlapping area of ​​the projected image based on the actuator, the signal processing device increases the number of adjacent pixels and outputs the brightness values ​​of the increased adjacent pixels and the compensation image signal based on the pixel brightness values ​​to the image generating device.

13. A projection device for a vehicle, wherein, include: Image generating device, outputs projected image; An actuator changes the direction of travel of the projected image from the image generation device and outputs a partially overlapping projected image; The detection unit detects the operation of the actuator; as well as The signal processing device calculates the resonant frequency based on the operation of the actuator, and changes the reference signal used to drive the actuator based on the calculated resonant frequency.

14. The projection device for a vehicle according to claim 13, wherein, Based on the action of the actuator, the signal processing device outputs a compensation image signal to the image generating device for compensating for overlapping areas of the projected image based on the actuator.

Images