JP4906450B2 - Display device - Google Patents

Description

  The present invention relates to a display device that displays an image, and more particularly to a display device that can adjust the position of a display image based on shaking of the display device and display a stable image for a user.

  Along with the recent reduction in size and weight of display devices, portable display devices that can be carried by users have become widespread. A user may install such a display device in a car and use it for watching a passenger's movie or television broadcast and using a driver's navigation function.

  However, depending on the installation location of the portable display device, the display image may be shaken with respect to the line of sight of the user who is a viewer, and the user who sees the swaying display image may feel bad. In particular, when the display device is installed in the vehicle, the vehicle vibrates back and forth, left and right, and up and down with respect to the traveling direction.

Therefore, a technique for reducing the burden on the user in the vehicle by adjusting the position of an image to be displayed based on the traveling state of the vehicle is disclosed in a portable display device premised on the vehicle (Patent Document 1). ). In the technique disclosed in Patent Document 1, for example, when a sensor such as an acceleration sensor or an angular velocity sensor detects that the car turns to the left, an image is displayed in the left direction as viewed from the user in order to turn the user's line of sight in the left direction. Display by shifting. Conversely, when the sensor detects that the car turns to the right, the image is shifted and displayed in the right direction as viewed from the user in order to turn the user's line of sight in the right direction. Thereby, deterioration of a user's mood can be reduced.
JP 2006-007867 A

  The technique disclosed in Patent Document 1 detects the left / right turn of the vehicle, acceleration / deceleration, and adjusts the position of the image, and is adjusted based on the traveling state of the vehicle in which the display device is installed. The technique disclosed in Patent Document 1 adjusts based on an empirical rule that a user's line of sight is directed to a traveling state of a vehicle so as not to make the user feel bad.

  The technique disclosed in Patent Document 1 specifically detects the user's shake by adjusting the position of the image on the basis of an empirical rule based on the rule of thumb of the vehicle's running condition and the user's line of sight. The position of the image is not adjusted based on the relative relationship with the shaking of the car. For example, even when the user's line of sight is greatly shaken with respect to the car's vertical shake, it is not detected and the position of the image is not adjusted. Therefore, since the image shakes with respect to the user's line of sight, deterioration of the user's mood may not be prevented.

  In addition, the technique disclosed in Patent Document 1 is a technique premised on being mounted on a vehicle, and it is necessary to detect a traveling state.

The present invention has been made in view of such circumstances, and is not limited to being mounted on a car, and includes two sensors for detecting shaking inside and outside the body, and a display device for a user who shakes independently of body shaking. To provide a display device capable of displaying a stable image for a user by detecting the relative shaking of the main body and adjusting the position of the image to be displayed so as to cancel the detected shaking. Main purpose.

  Another object of the present invention is to provide a stable display for the user by shifting and displaying the image by the magnitude of the relative shake in a direction that cancels the relative shake detected by the two sensors that detect the shake. An object of the present invention is to provide a display device capable of displaying an image.

  Another object of the present invention is to detect the magnitude and direction of the relative shake by taking the difference between the shake detection signals indicating the direction and magnitude of the shake output from the two sensors. An object of the present invention is to provide a display device that can display a stable image for a user by adjusting the position of an image to be displayed so as to cancel out the above.

  Another object of the present invention is to provide a display device that can absorb the inclination in the installation direction of two sensors that detect shaking and can display a more stable image for the user. is there.

A display device according to the present invention is a display device including a display unit that displays an image. The display device is installed in a main body including the display unit, and includes a first sensor that detects the direction and magnitude of shaking of the main body, is installed, it means for obtaining a detection result from the second sensor to detect the direction and magnitude of the shaking of portions to be installed, from the direction and magnitude of the obtained shake from the first sensor, the second sensor Calculating means for calculating the relative shake direction and magnitude of the main body relative to the location where the second sensor is installed by taking the difference between the shake direction and magnitude acquired from the position, characterized in that it comprises an adjustment means for adjusting so as to offset the relative shaking the calculating means is calculated.

In the present invention, the sensor installed in the main body is the first sensor, and the sensor installed outside the display device is the second sensor, so that relative shaking is detected from the shaking detected by the two sensors. Calculated. Further, the difference between the direction and magnitude of the shake acquired from the second sensor is taken from the direction and magnitude of the shake acquired from the first sensor. The difference indicates the direction and magnitude of relative shaking of the main body with respect to the location where the second sensor is installed. This is equivalent to calculating the shake of the location where the first sensor is installed with the location where the second sensor is installed as a reference point. By adjusting the position of the displayed image so as to cancel the relative shaking, the position of the displayed image is adjusted so that the image appears to be stationary relative to the place where the second sensor is installed. The

In the display device according to the present invention, the adjusting means is at a distance corresponding to the magnitude of the relative shake calculated by the calculating means from a preset position where the image is initially displayed , The position of the image to be displayed is adjusted in the direction opposite to the relative shake direction calculated by the calculating means.

In the present invention, the distance is equivalent to the magnitude of the relative shake calculated from the shake detected by the two sensors, and the relative position of the main body with respect to the location where the second sensor is installed. An image displayed so that the image appears to be stationary by adjusting the position of the image to move in the direction opposite to the direction of the shaking, thereby canceling the shaking of the image with respect to the location where the second sensor is installed. The position of is adjusted.

In the display device according to the present invention, each of the first and second sensors is installed so as to detect the direction of swing and the magnitude of the swing in a specific direction based on the horizontal or vertical direction of the displayed image. Yes and the tilt detection means for detecting a particular direction of inclination of the first sensor for a particular direction of the second sensor, based on the inclination inclined-out detecting means detects, a second sensor And a means for correcting the magnitude of the shake detected by the first sensor to a magnitude corresponding to the direction of the shake detected by the first sensor, wherein the calculating means is a difference in magnitude with respect to the direction of the shake detected by the first sensor. The adjustment means is a shake detected by the first sensor at a distance corresponding to the difference calculated by the calculation means from a preset initial image display position. Against the direction of It characterized in that you have to adjust the position of the image to be displayed on orientation.

In the present invention, even if the direction of shaking detected by the first sensor and the direction of shaking detected by the second sensor are not parallel, the first sensor can detect one direction. An inclination with respect to one direction that can be detected by the second sensor is detected. Based on the detected inclination, the magnitude of the shake detected by the first sensor is corrected to the magnitude of the shake direction detected by the second sensor. A distance corresponding to the difference in the magnitude of the shake after correction, and the second sensor is installed by adjusting the position of the image to move in the direction opposite to the direction of the relative shake. The shaking of the image with respect to the location is canceled out, and the position of the displayed image is adjusted so that the image looks stationary.

  A display device according to the present invention includes a light source, a modulation unit that forms an image based on an input image signal and modulates light from the light source, and a unit that projects light modulated by the modulation unit, The adjusting means moves the position of the image formed by the modulating means.

  In the present invention, when the light emitted from the light source is modulated, the position of the image to be modulated is adjusted so as to cancel the relative fluctuation with the location where the one sensor is installed as a stationary reference point. To do. Therefore, the modulated and projected image is displayed with its position adjusted so that the image appears to be stationary relative to the place where one sensor is installed.

  A display device according to the present invention includes a light source, a modulation unit that forms an image based on an input image signal and modulates light from the light source, and a projection optical system that projects light modulated by the modulation unit. The adjusting means moves the optical axis projected by the projection optical system.

  In the present invention, when projecting modulated light emitted from a light source, the light is projected so as to cancel relative fluctuations with the location where one sensor is installed as a stationary reference point. Adjust the position of the optical axis. Therefore, the modulated and projected image is displayed with its position adjusted so that the image appears to be stationary relative to the place where one sensor is installed.

According to the present invention, the relative calculated from the difference between the first direction and magnitude of the shaking detected by the sensor and the second direction and magnitude of the shaking detected by the sensor installed outside the server installed in the main body The position of the image is adjusted so as to cancel a typical shaking. Location to view an image displayed by installing the body or first sensor portion for displaying an image the user is standing, i.e., by placing a second sensor at a position swinging in synchronism with the user's gaze, the display The position of the image displayed by the apparatus can be adjusted so that the shaking of the display apparatus is canceled with reference to the user's line of sight, that is, the position of the image displayed so as to be viewed from the user's line of sight can be adjusted. Displayed images can be displayed.

In the case of the present invention, the distance is equivalent to the magnitude of relative shaking calculated from the direction and magnitude of shaking detected by the first sensor and the direction and magnitude of shaking detected by the second sensor. The position of the image is moved in the direction opposite to the direction of relative shaking, and the relative shaking with respect to the second sensor is canceled. The position of the image displayed by the display device is set based on the user's line of sight by installing the first sensor at the location where the image is displayed and installing the second sensor at the location where the user viewing the displayed image is present. The position of the image to be displayed can be adjusted so as to cancel the shaking of the display device, that is, so as to appear to be stationary from the user's line of sight, and a stable image can be displayed for the user.

In the case of the present invention, the specific one direction is not parallel to the two sensors that detect the direction and magnitude of the shaking with respect to the specific direction with respect to the horizontal direction or the vertical direction of the image to be displayed. When held, the direction and magnitude of the shaking with respect to one direction detected by the first sensor are corrected to the direction and magnitude of the shaking with respect to one direction detected by the second sensor. A difference is taken with respect to the direction and magnitude of the shake after correction, and the position of the image to be displayed is adjusted by moving in a direction opposite to the shake direction at a distance corresponding to the difference. By installing the second sensor at the location where the user who sees the displayed image by installing the first sensor at the location where the image is displayed, the inclination of the installation direction of the sensor that detects shaking is absorbed. The position of the image to be displayed can be adjusted so as to appear stationary from the user's line of sight, and a more stable image can be displayed for the user.

  In the case of the present invention, the light from the light source is modulated so as to cancel the relative fluctuation calculated from the direction and magnitude of the shaking detected by one sensor and the direction and magnitude of the shaking detected by the other sensor. Adjust the position of the image to do. The position of the image displayed on the display device is displayed with reference to the user's line of sight by installing another sensor at the location where the user is viewing the displayed image by installing one sensor at the location where the image is displayed The position of the image to be displayed can be adjusted so as to cancel the shaking of the apparatus, that is, so as to appear stationary from the user's line of sight, and a stable image for the user can be displayed.

  In the case of the present invention, the light from the light source is modulated so as to cancel the relative fluctuation calculated from the direction and magnitude of the shaking detected by one sensor and the direction and magnitude of the shaking detected by the other sensor. Adjust the position of the axis of the projected light. The position of the image displayed on the display device is displayed with reference to the user's line of sight by installing another sensor at the location where the user is viewing the displayed image by installing one sensor at the location where the image is displayed The position of the image to be displayed can be adjusted so as to cancel the shaking of the apparatus, that is, so as to appear stationary from the user's line of sight, and a stable image for the user can be displayed.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a display device according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a projection display device that modulates and projects light from a light source. The display device 1 includes at least a light source 11, a DMD (Digital Mirror Device: registered trademark) 12, a DMD control unit 13, an image processing unit 14, an input unit 15, a projection optical system 16, an adjustment unit 17, The receiver 18, the first sensor 19, the second sensor 20, and the transmitter 21 are provided. The user can view videos, images, and the like by viewing the light projected from the display device 1 onto the screen 2.

  The display device 1 includes a main body 1a including a casing, and includes a light source 11, a DMD 12, a DMD control unit 13, a video processing unit 14, an input unit 15, a projection optical system 16, an adjustment unit 17, and a reception. The part 18 and the first sensor 19 are provided inside the housing of the main body 1a. In addition, the display device 1 includes a sensor unit 1b including a casing separable from the main body 1a, and includes a second sensor 20 and a transmission unit 21 inside the casing of the sensor unit 1b. The sensor unit 1b is arranged at a position such as the user's seat where the user's line of sight can be detected. Further, the screen 2 is installed at an appropriate position that can be seen by the user, and the main body 1a of the display device 1 is installed so that an image can be projected onto the screen 2. For example, when the display device 1 according to Embodiment 1 of the present invention is installed in a vehicle, the main body 1a of the display device 1 is installed in a direction that projects an image onto the windshield behind the rear seat. The sensor unit 1b including the second sensor 20 is installed in the seat portion of the passenger seat. The screen 2 is installed so as to be suspended from the front center of the ceiling. The sensor unit 1b including the second sensor 20 may be configured to be installed on headphones or glasses worn by a user who views an image.

  The light source 11 includes a plurality of LEDs (Light Emitting Diodes) that emit red, green, and blue light. As will be described later, the light source 11 receives control signals for red LED, green LED, and blue LED from the DMD control unit 13 and turns on the red LED, green LED, and blue LED based on the received control signal. The DMD 12 modulates the light from the light source 11 by forming images for red, green, and blue in synchronization with the colors (red, green, and blue) of light emitted from the light source 11. The light source 11 of the display device 1 according to the first embodiment of the present invention is not limited to the LED, but includes a lamp that emits white light and a color wheel that generates red, green, and blue light from the white light in a time-sharing manner. The structure provided may be sufficient.

  The DMD 12 forms an image for each color of red, green, and blue in synchronization with the light of each color that arrives from the light source 11 and reflects the image for each color. A color image is projected onto the screen 2 by projecting an image for each color via the projection optical system 16, and the user can view the color image.

  The DMD control unit 13 controls the formation of an image in the DMD 12 and synchronizes the color of the image formed by the DMD 12 with the color of the light emitted from the light source 11, so that a control signal specifying the color emitted by the light source 11 is provided. Output to the light source 11. The DMD control unit 13 outputs a red LED control signal to the light source 11 while the DMD 12 forms a red image. Similarly, the DMD control unit 13 outputs a control signal for green LED to the light source 11 while the DMD 12 forms a green image, and outputs a control signal for blue LED while the DMD 12 forms a blue image. Output to the light source 11.

  The video processing unit 14 inputs an image signal through the input unit 15, performs processing such as changing the size of the displayed image, changing the color tone, and the like, and outputs the processed image to the adjusting unit 17. The image signal is a video signal that is read and decoded from a recording medium such as a DVD by a reading unit (not shown) built in the display device 1. The image signal may be a video signal input from an external device, or may be a video signal provided for television broadcasting provided with a tuner.

  The video processing unit 14 changes the size of the image so that margins can be provided at the left end, right end, upper end, and lower end of the image in order to adjust the position of the image displayed by the adjustment unit 17 as will be described later. For example, the display device 1 is changed to display an image with a size corresponding to 80% of the screen area.

  The light emitted from the light source 11 is modulated by the DMD 12 based on the image signal input from the input unit 15, and is projected onto the screen 2 by the projection optical system 16.

  The first sensor 19 is, for example, a biaxial angular velocity sensor, and is a known sensor that detects angular velocities in two orthogonal directions. The first sensor 19 projects the other axis (y-axis) so that the image of the image projected by the display apparatus 1 on one axis (x-axis) can be detected in the horizontal direction. It is installed so that it can detect the shaking of the image in the vertical direction. The second sensor 20 is also a biaxial angular velocity sensor, and is installed such that the x-axis and y-axis of the second sensor 20 are parallel to the x-axis and y-axis of the first sensor 19, respectively.

  The first sensor 19 and the second sensor 20 output a signal indicating the magnitude of the detected angular velocity as a potential and indicating the rotation direction as a plus or minus polarity. The first sensor 19 and the second sensor 20 are divided into signals for the x axis and signals for the y axis. A signal from the first sensor 19 is output to the adjustment unit 17. A transmission unit 21 capable of infrared communication is connected to the second sensor 20, and a signal indicating the angular velocity detected by the second sensor 20 is output to the transmission unit 21. The transmission unit 21 transmits a signal indicating the input angular velocity to the reception unit 18 provided in the main body 1a by infrared communication. The transmission of the signal indicating the angular velocity from the transmission unit 21 to the reception unit 18 is not limited to infrared communication, and a configuration in which a signal is transmitted by wire may be used.

  The receiving unit 18 receives a signal transmitted from the transmitting unit 21 by infrared communication. The receiving unit 18 outputs the received signal indicating the angular velocity from the second sensor 20 to the adjusting unit 17.

  The adjusting unit 17 has a function of a subtracter that subtracts the signal indicating the angular velocity input from the first sensor 19 and the signal indicating the angular velocity input from the second sensor 20 via the receiving unit 18 for each of the x-axis and the y-axis. Have. The adjustment unit 17 subtracts the angular velocity with respect to the x axis indicated by the signal input from the second sensor 20 from the angular velocity with respect to the x axis indicated by the signal input from the first sensor 19. Similarly, the adjustment unit 17 subtracts the angular velocity with respect to the y axis indicated by the signal input from the second sensor 20 from the angular velocity with respect to the y axis indicated by the signal input from the first sensor 19. The reason why the angular velocity detected by the second sensor 20 is subtracted from the angular velocity detected by the first sensor 19 is to adjust the position of the display image with reference to the line of sight of the user detected by the second sensor 20.

  The adjustment unit 17 has a function of adjusting the position of the image based on the difference in angular velocity with respect to each of the x axis and the y axis obtained by the function of the subtracter. The adjustment unit 17 calculates a margin length offset_h at the left end of the image and a margin length offset_v at the upper end of the image in order to adjust the position of the image. The adjustment unit 17 calculates the values of offset_h and offset_v in units of pixels, and calculates the values of offset_h and offset_v when the image signal from the video processing unit 14 is displayed with the left end, right end, upper end, and lower end margins evenly displayed. Use the reference value.

  The adjustment unit 17 converts the angular velocity difference with respect to the x-axis obtained by the function of the subtractor into a value indicating displacement in units of pixels, inverts the polarity, and adds the reference value to offset_h. Similarly, the adjustment unit 17 calculates the offset_v by converting the difference in angular velocity with respect to the y-axis into a value indicating deviation in units of pixels, inverting the polarity, and adding the value to the reference value. When the value of offset_h is large, it means that the image is shifted to the right, and when the value is small, it is meant that the image is shifted to the left. Similarly, when the value of offset_v is large, it means that the image is shifted downward, and when the value is small, it is meant that the image is shifted upward. The adjustment unit 17 adjusts the position to the left and right and up and down based on offset_h and offset_v with respect to the image signal whose size of the image input through the video processing unit 14 is reduced, and sends the adjusted image signal to the DMD control unit 13. Output.

  For example, the adjustment unit 17 may be configured such that the main body 1a in which the first sensor 19 is installed based on the sensor unit 1b in which the second sensor 20 is installed based on a difference between signals detected by the first sensor 19 and the second sensor 20. Is moving to the left with respect to the x-axis (horizontal direction). When the shift to the left is 5 pixels, the adjustment unit 17 calculates offset_h by adding 5 pixels to the reference value.

  The adjustment unit 17 adjusts the image signal input from the video processing unit 14 based on the calculated offset_h and outputs the image signal to the DMD control unit 13. For example, when the main body 1a moves to the left by 5 pixels with respect to the x-axis with respect to the sensor unit 1b, the offset value is calculated by adding 5 pixels to the reference value and the horizontal direction based on the calculated offset_h. The image signal input from the video processing unit 14 is adjusted so as to be shifted to the right by 5 pixels and output to the DMD control unit 13. The DMD control unit 13 causes the DMD 12 to form an image shifted to the right by 5 pixels in the horizontal direction based on the image signal from the adjustment unit 17.

  Similarly, the adjusting unit 17 has a main body 1a in which the first sensor 19 is installed based on the sensor unit 1b in which the second sensor 20 is installed, based on a difference between signals detected by the first sensor 19 and the second sensor 20. Is moving downward with respect to the y-axis (vertical direction). When the adjustment unit 17 detects that it moves downward, it calculates offset_v to shift the image upward. The adjustment unit 17 adjusts the image signal input from the video processing unit 14 based on the calculated offset_v and outputs the image signal to the DMD control unit 13. The DMD control unit 13 causes the DMD 12 to form an image shifted upward based on the image signal input from the adjustment unit 17.

  A procedure for adjusting the position of the image based on the difference in angular velocity detected by the first sensor 19 and the second sensor 20 in the display device 1 of the present invention configured as described above will be described. FIG. 2 adjusts the position of the image formed by the DMD 12 based on signals indicating the angular velocities from the first sensor 19 and the second sensor 20 input by the adjustment unit 17 of the display device 1 according to the first embodiment of the present invention. It is a flowchart which shows a process sequence.

  The adjustment unit 17 inputs a signal indicating the angular velocity from the first sensor 19 (step S11), and inputs a signal indicating the angular velocity from the second sensor 20 (step S12). The adjustment unit 17 subtracts the angular velocity indicated by the signal from the second sensor 20 from the angular velocity indicated by the signal from the first sensor 19 by the function of the subtracter (step S13), and from the result of the subtraction, the margin of the image formed by the DMD 12 is obtained. The length (offset_h, offset_v) is calculated (step S14). Based on the calculated margin lengths (offset_h, offset_v), the adjustment unit 17 adjusts the image signal input from the video processing unit 14 so that the position of the image is moved by the margin length (step S15). The processed image signal is output to the DMD control unit 13 (step S16), and the process is terminated.

  With such a configuration, even when the shaking of the line of sight of the user viewing the displayed image and the shaking of the display device 1 itself displaying the image are independent shaking, the angular velocity for detecting the shaking of the display device 1 By subtracting the signal from the angular velocity sensor that detects the shaking of the user's line of sight from the signal from the sensor, the shaking of the main body 1a of the display device 1 with respect to the user's line of sight can be calculated. The display device 1 forms an image whose position is adjusted based on the calculated shaking of the main body 1a of the display device 1, and modulates and projects the light from the light source 11 based on the adjusted image. Therefore, an image can be displayed at a stable position on the screen 2 with respect to the user's line of sight.

(Embodiment 2)
In the first embodiment, as a result of calculating the shaking of the display device 1 with respect to the user's line of sight by the adjustment unit 17, the position of the image formed by the DMD 12 is adjusted. In contrast, in the second embodiment, the optical axis of the projection optical system 16 that projects the light modulated based on the input image as a result of calculation by the adjustment unit 17 is adjusted.

  FIG. 3 is a block diagram showing the configuration of the display device 1 according to Embodiment 2 of the present invention. The display device 1 according to the second embodiment is the same as the hardware configuration of the display device 1 according to the first embodiment except for the connection relationship between the adjustment unit 17 and the DMD control unit 13 and the projection optical system 16. Therefore, a detailed description of the same components will be omitted, and the connection relationship between the adjusting unit 17 and the DMD control unit 13 and the projection optical system 16 will be described below using the same reference numerals.

  In the display device 1 according to the first embodiment, the adjustment unit 17 is connected to the DMD control unit 13 and the image signal adjusted from the adjustment unit 17 is output to the DMD control unit 13. The display device 1 according to the second embodiment is configured such that an image signal input to the video processing unit 14 via the input unit 15 is directly output from the video processing unit 14 to the DMD control unit 13. Also in this case, since the image position is adjusted by the adjusting unit 17 as described later, the video processing unit 14 changes the size of the image so that margins can be provided at the left end, the right end, the upper end, and the lower end of the image.

  The display device 1 according to the second embodiment further includes a drive unit 22, a stepping motor 23, and a lens holder 24.

  The drive unit 22 is connected to the adjustment unit 17, and a control signal generated based on the margin lengths (offset_h, offset_v) calculated by the adjustment unit 17 is input to the drive unit 22. The drive unit 22 is connected to a stepping motor 23 and outputs a control signal to the stepping motor 23 for control. The stepping motor 23 is installed so that the position of the lens holder 24 can be adjusted in the horizontal and vertical directions of the image.

  The lens holder 24 holds one lens constituting the projection optical system 16. This lens is a lens that determines the optical axis to be projected. The stepping motor 23 is operated via the drive unit 22 in accordance with a control signal indicating the margin lengths (offset_h, offset_v) output from the adjustment unit 17, and the position of the lens holder 24 is changed in the horizontal direction and the vertical direction in the vertical direction. It is possible to change to For example, when the value of offset_h is plus 5, the lens holder 24 is moved by the operation of the stepping motor 23 so as to shift the optical axis to the right by 5 pixels in the horizontal direction. By changing the position of the lens holder 24 vertically and horizontally with respect to the projected image, the position of the image displayed by the light projected on the screen 2 is adjusted vertically and horizontally.

  FIG. 4 shows a processing procedure for adjusting the position of the lens holder 24 based on the signals indicating the angular velocities from the first sensor 19 and the second sensor 20 input by the adjusting unit 17 of the display device 1 according to the second embodiment of the present invention. It is a flowchart which shows.

  The adjusting unit 17 inputs a signal indicating the angular velocity from the first sensor 19 (step S21), and inputs a signal indicating the angular velocity from the second sensor 20 (step S22). The adjustment unit 17 subtracts the angular velocity indicated by the signal from the second sensor 20 from the angular velocity indicated by the signal from the first sensor 19 by the function of the subtracter (step S23), and the margin of the image formed by the DMD 12 from the subtraction result. The length (offset_h, offset_v) is calculated (step S24). The adjusting unit 17 generates a control signal for operating the stepping motor 23 so that the position of the lens holder 24 is moved by the length of the margin based on the calculated margin length (offset_h, offset_v) (step S25). The generated control signal is output to the drive unit 22 (step S26), and the process is terminated.

  With such a configuration, even when the user's line-of-sight shake and the display apparatus 1 itself for displaying an image are independent of each other, the display is performed from the signal from the angular velocity sensor that detects the user's line-of-sight shake. By subtracting the signal from the angular velocity sensor that detects the shaking of the device 1, the shaking of the main body 1a of the display device 1 with respect to the user's line of sight can be calculated. The display device 1 adjusts the optical axis of the projection optical system 16 left and right and up and down with respect to the horizontal and vertical directions of the image based on the calculated shake of the main body 1a of the display device 1. Therefore, an image can be displayed at a stable position on the screen 2 with respect to the user's line of sight.

(Embodiment 3)
When installing the sensor unit 1b including the second sensor 20 with respect to the first sensor 19 already installed in the main body 1a, the x axis of the first sensor 19 and the x axis of the second sensor 20 are not installed in parallel. There is a time. When the inclination between the x-axis of the first sensor 19 and the x-axis of the second sensor 20 exceeds the angular velocity error that can be detected by the sensor, the difference between the angular velocities detected by the first sensor 19 and the second sensor 20 is calculated. Even so, the calculated result is not the difference between the original angular velocities, and the position of the displayed image is erroneously adjusted. In the third embodiment, the x-axis inclination of the first sensor 19 and the second sensor 20 is detected and the detected angular velocity is corrected.

  Since the hardware configuration in the third embodiment is the same as that in the first or second embodiment except for the transmission unit 21, the reception unit 18, and the adjustment unit 17, detailed description thereof will be omitted. The transmission unit 21, the reception unit 18, and the adjustment unit 17 in the third embodiment will be described below using the same reference numerals.

  In the first and second embodiments, the second sensor 20 is connected to the transmission unit 21 for transmitting the detection result, and the reception unit 18 receives a signal transmitted from the transmission unit 21. In the third embodiment, the x-axis inclinations of the first sensor 19 and the second sensor 20 are corrected using the transmitter 21 and the receiver 18. In the third embodiment, the display device 1 includes two transmitters 21a and 21b and two receivers 18a and 18b.

  FIG. 5 is an explanatory diagram conceptually showing the configuration of the transmission units 21a and 21b and the reception units 18a and 18b of the display device 1 according to Embodiment 3 of the present invention. In the example shown in FIG. 5, the x-axis of the second sensor 20 is inclined by the angle θ with respect to the x-axis of the first sensor 19. The y-axis of the first sensor 19 and the second sensor 20 is directed from the front to the back perpendicular to the paper surface of FIG.

  The transmission units 21a and 21b transmit signals by infrared communication. The receiving units 18a and 18b receive signals by infrared communication. The transmitters 21 a and 21 b are arranged at a predetermined interval I so as to be arranged in a straight line parallel to the x-axis of the second sensor 20. The receivers 18a and 18b are arranged at the same interval I as the transmitters 21a and 21b so as to be arranged in a straight line parallel to the x-axis of the first sensor 19. That is, when the x axis of the first sensor 19 and the x axis of the second sensor 20 are installed in parallel, the distance La from the transmission unit 21a to the reception unit 18a and the distance Lb from the transmission unit 21b to the reception unit 18b. And become equal.

  Moreover, the infrared rays transmitted from the transmission units 21a and 21b have the same light intensity. Since the transmission units 21a and 21b transmit signals that can be identified, it is possible to identify which transmission unit 21a and 21b the reception units 18a and 18b have received. The receiving unit 18a is configured to receive infrared rays transmitted from the transmitting unit 21a, and the receiving unit 18b is configured to receive infrared rays transmitted from the transmitting unit 21b. Each of the receiving units 18a and 18b has a light intensity sensor (not shown), and detects the received light intensity of infrared rays. The receiving units 18 a and 18 b output a signal indicating the received light intensity to the adjusting unit 17.

  When the distance La and the distance Lb are equal, the light intensity of infrared rays received by the receiving units 18a and 18b is equal. This is because the infrared light intensity transmitted from the transmission units 21a and 21b is the same. On the other hand, when the second sensor 20 cannot be installed so that the x-axis is parallel to the first sensor 19, the distance La and the distance Lb are different, so the light intensity received by the receiving units 18a and 18b is different. .

  The adjusting unit 17 calculates the difference in light intensity from the signal indicating the infrared light intensity received by the receiving unit 18a and the signal indicating the infrared light intensity received by the receiving unit 18b. The adjustment unit 17 has a correspondence relationship based on actual measurement of the inclination θ with respect to the difference in light intensity so that the inclination θ between the x axis of the first sensor 19 and the x axis of the second sensor 20 can be calculated from the difference in light intensity. Is stored in a storage unit (not shown).

  In the example shown in FIG. 5, the angular velocity with respect to the x axis that can be detected by the second sensor 20 is the angular velocity with respect to the axis inclined by the angle θ with respect to the x axis of the first sensor 19. Therefore, the detected angular velocity is a component with respect to an axis inclined by an angle θ from the x axis of the actual angular velocity with respect to the x axis. The adjusting unit 17 corrects the magnitude of the angular velocity detected by the second sensor 20 based on the calculated inclination θ by dividing it by the absolute value of cos θ, and then subtracts it from the angular velocity detected by the first sensor 19.

  FIG. 6 is a flowchart illustrating a processing procedure for obtaining the inclination θ between the x axis of the first sensor 19 and the x axis of the second sensor 20 input by the adjustment unit 17 of the display device 1 according to the third embodiment of the present invention. .

  The adjustment unit 17 receives a signal indicating the light intensity from the reception units 18a and 18b (step S31). The adjustment unit 17 calculates the difference in light intensity indicated by the received signal (step S32), and incorporates the inclination θ between the x axis of the first sensor 19 and the x axis of the second sensor 20 from the calculated difference in light intensity. Read from the correspondence stored in the storage unit (step S33). The adjustment unit 17 stores the read inclination θ in the built-in storage unit (step S34) and ends the process.

  The adjustment unit 17 repeats the processing procedure for calculating the inclination θ shown in FIG. 6 every time the display device 1 is turned on, for example. The adjustment unit 17 stores the calculated inclination θ in a built-in storage unit, and can correctly adjust the display position based on the difference in angular velocity with respect to the input image signal.

  FIG. 7 shows a processing procedure for correcting the angular velocity based on the inclination θ stored by the adjusting unit 17 of the display device 1 according to the third embodiment of the present invention and adjusting the position of the image based on the corrected angular velocity. It is a flowchart which shows.

  The adjusting unit 17 inputs a signal indicating the angular velocity from the first sensor 19 (step S41), and inputs a signal indicating the angular velocity from the second sensor 20 (step S42). The adjustment unit 17 reads the inclination θ stored in the built-in storage unit (step S43), calculates cos θ based on the read inclination θ, and uses cos θ that calculates the angular velocity indicated by the signal from the second sensor 20. Correction is performed by division (step S44). The adjusting unit 17 subtracts the angular velocity corrected in step S44 from the angular velocity indicated by the signal detected by the first sensor 19 (step S45).

  The adjustment unit 17 calculates the margin length (offset_h, offset_v) of the image from the subtraction result (step S46). Based on the calculated margin lengths (offset_h, offset_v), the adjustment unit 17 adjusts the image signal input from the video processing unit 14 for moving the position of the image by the margin length, or the lens holder 24 A control signal for operating the stepping motor 23 is generated so that the position is moved by the length of the margin (step S47), and the adjusted image signal is output to the DMD control unit 13 or the generated control signal is driven. The output to the unit 22 is performed (step S48), and the process is terminated.

  Thereby, even when the x-axis of the first sensor 19 and the x-axis of the second sensor 20 cannot be installed in parallel, the difference in angular velocity can be calculated correctly, and the image can be more accurately displayed. The position for displaying can be adjusted.

  In the third embodiment, the tilt between the x axis of the first sensor 19 and the x axis of the second sensor 20 is corrected. However, the present invention is not limited to this, and it is of course possible to correct the inclination between the y axis of the first sensor 19 and the y axis of the second sensor 20.

  In the first to third embodiments, each of the first sensor 19 and the second sensor 20 is configured by a biaxial angular velocity sensor. However, the present invention is not limited to this, and the first sensor 19 and the second sensor 20 may be sensors capable of detecting the shaking of the display device 1 and the shaking of the user's line of sight such as an acceleration sensor and a shaking sensor.

  In the first to third embodiments, the first sensor 19 and the second sensor 20 are installed so that the horizontal direction and the vertical direction of the image projected and displayed by the display device 1 of the present invention are two axes. did. However, the present invention is not limited to this, and a configuration in which two axes are oriented in the horizontal direction and the depth direction of an image to be displayed may be employed. In this case, when the display device 1 of the present invention is installed in a vehicle, the directions of the angular velocities detected by the first sensor 19 and the second sensor 20 coincide with the directions of the left and right rudder directions and the acceleration / deceleration direction, A stable image can be displayed by removing shaking. Further, the first sensor 19 and the second sensor 20 are constituted by a triaxial angular velocity sensor, and the image position is determined with respect to the direction of the vibration in any of the left and right rudder direction, acceleration / deceleration direction, and vertical vibration direction of the vehicle. It may be possible to adjust.

  Further, in Embodiments 1 to 3, the display device 1 of the present invention includes the light source 11 and the DMD 12 that modulates the light from the light source 11 and is configured as a projection type display device that projects the light reflected by the DMD 12. However, the present invention is not limited to this, and includes a sensor that detects shaking in the main body that forms the image and the position of the user who views the image, and is stable by adjusting the shaking of the image based on the user's line of sight. As long as an image can be displayed, it is not limited to a projection display device. For example, in a display device having a liquid crystal display panel, shaking is detected by a first sensor provided in the main body and a second sensor installed in a user's seat or the like. Also in this case, the display device includes an adjustment unit, and the adjustment unit adjusts the length of the image margin for the image signal whose size is reduced in consideration of the margin in the video processing unit based on the difference of the detected shaking. Output to the display panel and adjust the image display position.

It is a block diagram which shows the structure of the display apparatus in Embodiment 1 of this invention. It is a flowchart which shows the process sequence which adjusts the position of the image formed by DMD based on the signal which shows the angular velocity from the 1st sensor and 2nd sensor which the adjustment part of the display apparatus in Embodiment 1 of this invention input. It is a block diagram which shows the structure of the display apparatus in Embodiment 2 of this invention. It is a flowchart which shows the process sequence which adjusts the position of a lens holder based on the signal which shows the angular velocity from the 1st sensor and 2nd sensor which the adjustment part of the display apparatus in Embodiment 2 of this invention input. It is explanatory drawing which shows notionally the structure of the transmission part of the display apparatus in Embodiment 3 of this invention, and a receiving part. It is a flowchart which shows the process sequence which calculates | requires the inclination of the x-axis of a 1st sensor and the x-axis of a 2nd sensor which the adjustment part of the display apparatus in Embodiment 3 of this invention inputs. It is a flowchart which shows the process sequence which correct | amends angular velocity based on the inclination memorize | stored in the adjustment part of the display apparatus in Embodiment 3 of this invention, and adjusts the position of an image based on the angular velocity after correction | amendment.

Explanation of symbols

1 Display device 11 Light source 12 DMD
17 Adjustment unit 18, 18a, 18b Reception unit 19 First sensor 20 Second sensor 21, 21a, 21b Transmission unit 22 Drive unit 23 Stepping motor 24 Lens holder

Claims (5)

In a display device comprising display means for displaying an image,
A first sensor that is installed in a main body provided with the display means and detects the direction and magnitude of shaking of the main body;
Is installed outside the body, it means for obtaining a detection result from the second sensor to detect the direction and magnitude of the shaking of portions to be installed,
By taking the difference in the direction and magnitude of the shaking acquired from the second sensor from the direction and magnitude of the shaking acquired from the first sensor, the position of the main body with respect to the location where the second sensor is installed A calculating means for calculating the direction and magnitude of relative shaking ;
Display device characterized by comprising an adjustment means for the position of the image to be displayed is adjusted to offset the relative shaking the calculating means is calculated. The adjusting means is at a distance corresponding to the magnitude of relative shaking calculated by the calculating means from a preset initial image display position, and is calculated by the calculating means. The display device according to claim 1, wherein the position of an image to be displayed is adjusted in a direction opposite to the direction of shaking. Each of the first and second sensors is installed so as to detect the direction of swing and the magnitude of the swing with respect to a specific direction based on the horizontal or vertical direction of the image to be displayed .
And tilt detecting means for detecting a particular direction of inclination of the first sensor for a particular direction of the second sensor,
Means for correcting the magnitude of the shaking detected by the second sensor based on the tilt detected by the tilt detecting means to a magnitude corresponding to the direction of shaking detected by the first sensor;
The calculating means is adapted to take a difference in magnitude with respect to the direction of shaking detected by the first sensor,
The adjusting means is at a distance corresponding to the difference calculated by the calculating means from a preset initial image display position, and is opposite to the direction of shaking detected by the first sensor. the display device according to claim 1 or 2, characterized in that you have to adjust the position of the image to be displayed on orientation. A light source, a modulation unit that forms an image based on an input image signal and modulates light from the light source, and a unit that projects light modulated by the modulation unit,
It said adjusting means, a display device according to any one of claims 1 to 3, characterized in that you have to move the position of the image which the modulating means is formed. A light source, a modulation unit that forms an image based on the input image signal and modulates the light from the light source, and a projection optical system that projects the light modulated by the modulation unit,
The display device according to any one of claims 1 to 3 , wherein the adjustment unit is configured to move an optical axis projected by the projection optical system.

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