TWI680325B - Display device and display method - Google Patents

Abstract

A display device and a display method thereof. The display device includes an image display module and a display control circuit. The display control circuit is coupled to the image display module and receives a first image signal and a second image signal for presenting a three-dimensional image. The display control circuit is further configured to determine whether the included angle between the line and the horizontal line between the visual center point of the first display area in the image display module and the visual center point of the second display area in the image display module is not less than a predefined angle In addition, when the included angle is not less than a predefined angle, the display control circuit is further configured to switch the first image signal displayed in the first display area and the second image signal in the second display area to a third image signal.

Description

Display device and display method

The present invention relates to a display device and a display method thereof, and more particularly, to a display device and a display method thereof to avoid the occurrence of ghosting in a stereo image.

The principle of stereo images is mainly to make the left and right eyes see slightly different pictures, and use the parallax principle to produce the feeling of stereo images. When the left and right eyes respectively experience the simulated parallax of different visual images, the human brain will automatically reorganize the images, so that the images that the two eyes "see" automatically fuse into the three-dimensional stereo vision in the brain.

The head-mounted display (HMD) directly sends the left and right eye images required for rendering stereoscopic images to two micro LCD or AMOLED display panels, which are respectively displayed in front of the left and right eyes, usually using eye masks or helmets. In the form, the display panel is close to the eyes of the user, and the focal length is adjusted through the light path to project a picture on the eyes at a short distance. A head-mounted display can produce a wide viewing angle picture with a much smaller volume than a normal display, and the viewing angle usually exceeds 90 degrees. Because the display panels corresponding to the left and right eyes are usually two independent display panels, the head-mounted display generally supports the playback of stereoscopic images.

At present, the stereoscopic videos or photos taken by the entity are usually taken with a horizontal angle of view, which conforms to the horizontal angle of view of two eyes under normal circumstances and forms a stereoscopic image. When viewing a stereoscopic video or photo with a head-mounted display, if the user ’s head is tilted beyond a predefined angle, the stereoscopic video or photo seen by the human eye may appear as a ghost image. If the tilted angle exceeds a predefined angle, The larger the angle of inclination, the more serious the ghosting problem, and the stereoscopic movie or photo cannot be seen clearly. Therefore, how to solve the problem of ghosting in stereo images is a topic of concern to those skilled in the art.

The invention provides a display device and a display method thereof, and solves the problem of ghosting that may occur when viewing a stereoscopic movie or photo with a head-mounted display.

An exemplary embodiment of the present invention provides a display device including an image display module and a display control circuit. The display control circuit is coupled to the image display module and receives a first image signal and a second image signal for presenting a three-dimensional image. The display control circuit is further used to determine whether the angle between the line and the horizontal line between the visual center point of the first display area in the image display module and the visual center point of the second display area in the image display module is not less than a predefined angle . In addition, the display control circuit is further configured to include an angle between a line and a horizontal line between the visual center point of the first display area in the image display module and the visual center point of the second display area in the image display module, which is not less than a predefined angle , The first image signal displayed in the first display area and the second image signal in the second display area are switched to the third image signal.

In an exemplary embodiment of the present invention, the image display module includes a first image display and a second image display. The first image display and the second image display are symmetrically installed on both sides of the housing. The first image display includes a first display area and the second image display includes a second display area.

In an exemplary embodiment of the present invention, when an angle between a line and a horizontal line between the visual center point of the first display area in the image display module and the visual center point of the second display area in the image display module is smaller than a predefined value In the case of an angle, the display control circuit is further configured to display the first image signal and the second image signal received to display the three-dimensional image in the first display area and the second display area, respectively.

In an exemplary embodiment of the present invention, the pre-defined angle is equal to 0 ± X, and X is a tolerance angle.

In an exemplary embodiment of the present invention, the third image signal is the same as the first image signal or the second image signal.

In an exemplary embodiment of the present invention, the display device further includes a detection circuit for detecting the positions of the first image display and the second image display, and calculating the first image display based on the positions of the first image display and the second image display. The angle between the line and the horizontal line between the visual center point of the first display area of the image display and the visual center point of the second display area of the second image display.

In an exemplary embodiment of the present invention, the detection circuit includes a spirit level or a gyroscope or a sensor capable of detecting a linear movement, a linear movement direction, and a rotation movement of the display device.

In an exemplary embodiment of the present invention, the display device further includes a communication circuit coupled to the display control circuit for receiving the first image signal and the second image signal through a wired network or a wireless network.

An exemplary embodiment of the present invention provides a display method for a display device, where the display device includes an image display module and a display control circuit coupled to the image display module. The image display module includes a first display area and a second display area. The display method includes receiving a first image signal and a second image signal for presenting a three-dimensional image; and determining a visual center point of a first display area of the image display module and a visual center point of a second display area of the image display module. Whether the included angle between the horizontal line and the horizontal line is not less than a predefined angle; and when the visual center point of the first display area of the image display module and the visual center point of the second display area of the image display module and When the included angle of the horizontal line is not less than a predefined angle, the first image signal displayed on the first display area and the second image signal displayed on the second display area are switched to the third image signal.

In an exemplary embodiment of the present invention, the image display module includes a first image display and a second image display mounted symmetrically on both sides of the casing.

In an exemplary embodiment of the present invention, the method further includes: when the visual center point of the first display area of the image display module and the visual center point of the second display area of the image display module are connected, and the horizontal line When the included angle is smaller than the predefined angle, the first image signal and the second image signal received for presenting a stereo image are displayed in the first display area and the second display area, respectively.

In an exemplary embodiment of the present invention, the method further includes: detecting positions of the first image display and the second image display, and calculating a first of the first image display according to the positions of the first image display and the second image display. The angle between the line and the horizontal line between the visual center point of the display area and the visual center point of the second display area of the second image display.

In an exemplary embodiment of the present invention, the method further includes: receiving the first image signal and the second image signal through a wired network or a wireless network.

Based on the above, the display device and the display method of the above exemplary embodiments display the same image signal on the first image display and the second image display when the user's head is tilted beyond a predefined angle, thereby solving the problem of viewing. The problem of ghosting in stereo images.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a display device according to an exemplary embodiment.

Referring to FIG. 1, the display device 100 includes an image display module and a casing 107. In an exemplary embodiment, the display device 100 uses a head-mounted display as an example. However, it must be understood that the display device 100 may also be other electronic devices, and is not limited thereto.

In this exemplary embodiment, the image display module includes a first image display 101 and a second image display 102. The first image display 101 and the second image display 102 are symmetrically installed on both sides of the housing 107, and the first image display 101 The second image display 102 includes a first display area. When the user puts on the display device 100, the first display area of the first image display 101 is close to the left eye of the user (the first image display 101 may also be referred to as the left-eye display screen), and the second image display 102 The display area is close to the right eye of the user (the second image display 102 may also be referred to as a right-eye display screen). That is, when the user puts on the display device 100 to view the stereoscopic image, the first image display 101 and the second image display 102 are completely independent from each other, and the left-eye and right-eye images required for the stereo image will be presented, respectively. Projected on the first display area of the first image display 101 and the second display area of the second image display 102 corresponding to the left and right eyes, so that the left and right eyes are respectively displayed on the first display of the first image display 101 A slightly different left-eye and right-eye images are seen in the area and the second display area of the second image display 102, and a stereoscopic image is generated using the parallax principle.

FIG. 2 is a schematic block diagram of a display device according to an exemplary embodiment.

Referring to FIG. 2, the display device 100 includes a first image display 101, a second image display 102, a display control circuit 103, a detection circuit 104, a communication circuit 105, and a power supply circuit 106.

As described above, the first image display 101 and the second image display 102 are used to display images. For example, the first image display 101 and the second image display 102 may include a Liquid Crystal Display (LCD), a Light-Emitting Diode (LED), a Field Emission Display (FED), or Other types of displays.

The display control circuit 103 is coupled to the first image display 101 and the second image display 102 to control the first image display 101 and the second image display 102 to display images. For example, the display control circuit 103 controls the first display area of the first image display 101 and the second display area of the second image display 102 to separately display two different image frames that allow the user to view a stereo image. For example, the display control circuit 103 may be a North Bridge, a South Bridge, a Field Programmable Array (FPGA), a Programmable Logic Device (PLD), a special application product Application Specific Integrated Circuits (ASIC), other similar devices, or a combination of these devices. The display control circuit 103 may also be a central processing unit (CPU) or other programmable general purpose or special purpose microprocessor (Microprocessor), digital signal processor (DSP), graphics Graphics Processing Unit (GPU), other similar devices, or a combination of these devices.

The detection circuit 104 is coupled to the display control circuit 103, the first image display 101 and the second image display 102, and is configured to detect the positions of the first image display 101 and the second image display 102. In particular, the detection circuit 104 calculates the visual center point of the first display area of the first image display 101 and the second display of the second image display 102 according to the detected positions of the first image display 101 and the second image display 102. The angle between the line between the visual center points of the area and the horizontal line. In this exemplary embodiment, for example, the detection circuit 104 is provided with a level meter or a gyroscope or any sensor capable of detecting the linear movement, the linear movement direction, and the rotation movement (such as the rotation angular velocity or rotation angle) of the display device 100, To detect the positions of the first image display 101 and the second image display 102. However, it must be understood that the present invention is not limited to this.

For example, in an exemplary embodiment, a plurality of sensors may be provided on the first image display 101 and the second image display 102, respectively, for the detection circuit 104 independent of the display device 100 to pass through the first image display 101 and the first image display 101. The sensors on the two image displays 102 detect the positions of the first image display 101 and the second image display 102. In addition, in another exemplary embodiment, other positioning sensors may also be used to track the spatial position of the first image display 101 and the second image display 102. For example, the first image display 101 and the second image display 102 may A light-sensitive sensor uses an infrared laser transmitter externally provided on the display device 100 to send signals to acquire the positions and movement trajectories of the first image display 101 and the second image display 102, so as to accurately track the user's head movement, thereby Calculate the connection between the visual center point of the first display area of the first video display 101 and the visual center point of the second display area of the second video display 102 according to the positions of the first video display 101 and the second video display 102 Angle with horizontal line.

The communication circuit 105 is coupled to the display control circuit 103 and is used for receiving image signals through a wireless network. Specifically, the communication circuit 105 transmits the first image signal and the second image signal to the display control circuit 103 after receiving the first image signal and the second image signal for displaying the stereoscopic image through the wireless network, and displays the The control circuit 103 sends the first image signal and the second image signal to the first image display 101 and the second image display 102, respectively, so that the user can view the stereo image through the display device 100. For example, the communication circuit 105 is compliant with Bluetooth (Bluetooth), Zigbee, WiFi, Global System for Mobile Communications (GSM), Wideband Code Division Multiple Access (WCDMA), long-term Long Term Evolution (LTE) or other suitable standards. However, the present invention is not limited to this, and the communication circuit 105 may also receive image signals through a wired network.

The power supply circuit 106 is coupled to the display control circuit 103 to provide power to the display device 100 through a built-in power source (eg, a battery) or an external power source.

In this exemplary embodiment, the display control circuit 103 determines the visual center point of the first display area of the first image display 101 and the visual center of the second display area of the second image display 102 according to the detection result of the detection circuit 104. Whether the angle between the line between the points and the horizontal line is not less than a predefined angle.

When it is determined that the angle between the line between the visual center point of the first display area of the first image display 101 and the visual center point of the second display area of the second image display 102 and the horizontal line is smaller than a predefined angle, the display control circuit 103 The first image signal and the second image signal used to present the stereo image are sent to the first image display 101 and the second image display 102 to generate corresponding images. Based on this, using the principle of parallax, the user sees the stereo image, and the stereo image does not cause ghosting.

When the included angle is not less than a predefined angle, the display control circuit 103 switches the first image signal and the second image signal input to the first image display 101 and the second image display 102 to a third image signal. That is, the first image display 101 and the second image display 102 simultaneously display the third image signal, that is, the same image signal is displayed at the same time. At this time, the left and right eyes of the user can see the same image without causing the problem of ghosting. In this exemplary embodiment, for example, the third image signal may be a first image signal or a second image signal.

In an exemplary embodiment, the pre-defined angle is 0 degrees plus or minus a tolerance angle. For example, the predefined angle is 30 degrees.

In more detail, the electronic device uses two lenses (not shown in the figure) to capture images, and the two lenses capture images at a horizontal shooting angle, and the horizontal shooting angle refers to two The angle between the line between the center point of the lens and the horizontal line is 0 degrees. When the electronic device provides an image captured at a shooting angle of the horizontal angle to the display device 100, that is, the electronic device provides a first image signal and a second image signal corresponding to an image captured by the two lenses of the shooting angle of the horizontal angle. To the display device 100 to display the first image signal and the second image signal for displaying a stereo image on the first image display 101 and the second image display 102 of the display device 100, respectively.

When a head-mounted display is used to view an image shot by the electronic device at a horizontal angle, the user may also view an image shot by the electronic device at a horizontal angle from a horizontal viewing angle. That is, the angle between the line and the horizontal line between the visual center point of the first display area of the first video display 101 and the visual center point of the second display area of the second video display 102 when the head-mounted display is installed. When the angle is 0 degrees plus or minus a tolerance angle, the first image signal and the second image signal used to present the stereo image are transmitted to the first image display 101 and the second image display 102 to display the image, respectively. , Users will see clear stereo images without ghosting.

When the detection circuit 104 detects that the display device 100 is tilted, that is, the connection between the visual center point of the first display area of the first image display 101 and the visual center point of the second display area of the second image display 102 The angle between the line and the horizontal line is more than 0 degrees plus or minus a tolerance angle, and it is possible to produce ghosting. For example, when the angle of this included angle (0 ± tolerance angle) is not less than 30 degrees, as the angle of this included angle is larger, the ghosting on the stereoscopic image seen by the user will be more serious.

When the display control circuit 103 determines that the included angle is not less than 30 degrees, the display control circuit 103 switches the first image signal transmitted to the first image display 101 and the second image signal displayed on the second image display 102 to the first at the same time. Three image signals. At this time, the left and right eyes of the user can see the same image, and there will be no ghost image.

FIG. 3 is a flowchart of a display method according to an exemplary embodiment.

Referring to FIG. 3, in step S301, the display control circuit 103 receives a first image signal and a second image signal for presenting a three-dimensional image.

In step S303, the detection circuit 104 detects the positions of the first image display and the second image display, and calculates the visual center of the first display area of the first image display according to the positions of the first image display and the second image display. The angle between the line and the horizontal line between the point and the visual center point of the second display area of the second image display.

In step S305, the display control circuit 103 determines whether the angle between the line between the visual center point of the first display area of the first video display and the visual center point of the second display area of the second video display and the horizontal line is not less than Pre-defined angle.

In step S307, when the angle between the line and the horizontal line between the visual center point of the first display area of the first video display and the visual center point of the second display area of the second video display is not less than a predefined angle, display The control circuit 103 switches the first image signal displayed on the first image display and the second image signal of the second image display to a third image signal. In step S309, when the included angle between the line between the visual center point of the first display area of the first image display and the visual center point of the second display area of the second image display and the horizontal line is less than an angle, the received The first image signal and the second image signal for displaying a stereo image are displayed on the first image display and the second image display, respectively. Among them, the predefined angle is 30 degrees.

In summary, the display device and the display method of the above-mentioned exemplary embodiments can transmit the image to the first image display when the user views a stereoscopic image using a head-mounted display and the head is tilted beyond a predefined angle. The first image signal and the second image signal of the second image display switch to display the same image signal at the same time, thereby solving the problem that the stereoscopic image is prone to overlap when the head is tilted beyond a predefined angle.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

101: first image display 102: second image display 103: display control circuit 104: detection circuit 105: communication circuit 106: power supply circuit 107: housing 100: display device S301: receiving first Step S303 of the video signal and the second video signal: detecting the positions of the first video display and the second video display, and calculating the vision of the first display area of the first video display based on the positions of the first video display and the second video display Step S305: determining the visual center point of the first display area of the first image display and the second image display of the second image display Whether the angle between the line between the visual center points of the two display areas and the horizontal line is not less than a predefined angle: Step S307: switch the first image signal displayed on the first image display and the second image signal of the second image display to Step S309 of the third image signal: receiving the first image signal for displaying a stereo image The second video signal are displayed in a first step and the second video image display monitor

FIG. 1 is a schematic diagram of a display device according to an exemplary embodiment. FIG. 2 is a schematic block diagram of a display device according to an exemplary embodiment. FIG. 3 is a flowchart of a display method according to another exemplary embodiment.

Claims (13)

A display device includes: an image display module, the image display module includes a first image display and a second image display; a display control circuit coupled to the image display module; a communication circuit, Coupled to the display control circuit, wherein the communication circuit is configured to receive a first image signal and a second image signal for presenting a stereo image through a wired network or a wireless network, and A first image signal and the second image signal are transmitted to the display control circuit; and a detection circuit for detecting the positions of the first image display and the second image display, and according to the first A position between an image display and the second image display calculates a distance between a visual center point of a first display area of the first image display and a visual center point of a second display area of the second image display. An angle between a line and a horizontal line, wherein the display control circuit is further configured to determine a visual center point of the first display area and a visual point of the second display area Whether the included angle between the center point and the horizontal line is not less than a predefined angle, wherein the display control circuit is further configured to connect the visual center point of the first display area with the second display area When the included angle between the visual center point of the horizontal line and the horizontal line is not less than the predefined angle, the first image signal displayed in the first display area and the The second image signal is switched to a third image signal. The display device according to item 1 of the scope of patent application, wherein the first image display and the second image display are symmetrically installed on both sides of a casing, and the first image display includes the first display. Area, the second image display includes the second display area. The display device according to item 1 of the scope of patent application, wherein when the visual center point of the first display area in the image display module and the visual center point of the second display area in the image display module When the included angle between the connecting line and the horizontal line is smaller than the predefined angle, the display control circuit is further configured to convert the received first image signal and the received first image signal to display the stereo image. The second image signal is displayed in the first display area and the second display area, respectively. The display device according to item 1 of the scope of patent application, wherein the predefined angle is equal to 0 ± X, and X is a tolerance angle. The display device according to item 1 of the scope of patent application, wherein the third image signal is the same as the first image signal or the second image signal. The display device according to item 1 of the patent application scope, wherein the detection circuit comprises a spirit level or a gyroscope. A display method is used in a display device. The display device includes an image display module and a display control circuit coupled to the image display module. The image display module includes a first display area and A second display area, the display method includes: receiving a first image signal and a second image signal for presenting a stereoscopic image; determining a visual center point of the first display area of the image display module Whether an included angle between a connection line and a visual center point of the second display area of the image display module and a horizontal line is not less than a predefined angle; and when the first of the image display module When the included angle between the visual center point of the display area and the visual center point of the second display area of the image display module and the horizontal line is not less than the predefined angle, it will be displayed at all The first image signal in the first display area and the second image signal in the second display area are switched to a third image signal. The display method according to item 7 of the scope of patent application, wherein the image display module includes a first image display and a second image display which are symmetrically installed on both sides of a casing. The display method according to item 7 of the scope of patent application, wherein when the visual center point of the first display area of the image display module and the visual center point of the second display area of the image display module When the included angle between the connection line and the horizontal line is smaller than the predefined angle, the first image signal and the second image signal received to render the stereoscopic image are separately displayed on all The first display area and the second display area. The display method according to item 7 of the scope of patent application, wherein the predefined angle is equal to 0 ± X, and X is a tolerance angle. The display method according to item 7 of the scope of patent application, wherein the third image signal is the same as the first image signal or the second image signal. The display method according to item 8 of the scope of patent application, further comprising: detecting positions of the first image display and the second image display, and according to the position of the first image display and the second image display. Calculating the angle between the line and the horizontal line between the visual center point of the first display area of the first video display and the visual center point of the second display area of the second video display . The display method according to item 7 of the scope of patent application, further comprising: receiving the first image signal and the second image signal through a wired network or a wireless network.