CN109743563B - Naked eye 3D display method and system - Google Patents
Naked eye 3D display method and system Download PDFInfo
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- CN109743563B CN109743563B CN201910153347.2A CN201910153347A CN109743563B CN 109743563 B CN109743563 B CN 109743563B CN 201910153347 A CN201910153347 A CN 201910153347A CN 109743563 B CN109743563 B CN 109743563B
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Abstract
The embodiment of the invention provides a naked eye 3D display method and a system, wherein the system comprises the following steps: display screen, control circuit and grating board. The display screen acquires and displays the video frame; the video frame comprises a type identifier, wherein the type identifier is an identifier indicating that the video frame is a left-eye video frame or an identifier indicating that the video frame is a right-eye video frame; the control circuit acquires the type identifier, generates a grating control signal according to the type identifier and sends the grating control signal to the grating board; the grating board changes the opening state of the stripes according to the grating control signal. The visible control circuit can acquire the type identification in the video frame in real time, so that the synchronous signal of the video frame is accurately extracted.
Description
Technical Field
The invention relates to the technical field of three-dimensional display, in particular to a naked-eye 3D (three-dimensional) display method and system.
Background
In recent years, three-dimensional stereoscopic display technology has been rapidly developed, wherein the naked-eye 3D technology enables a user to experience a stereoscopic effect of a 3D image without wearing any auxiliary device.
The key point of the naked eye 3D technology lies in the principle of simulating human eye stereo imaging, and two important principles are involved here: binocular parallax principle and persistence of vision effect. The binocular parallax principle of human eyes means that object images on the retinas of left and right eyes have a certain level difference due to different pupil distances and fixation angles of people. The persistence of vision of the human eye is a phenomenon in which the vision produced by light on the retina remains for a certain period of time after the light ceases to act.
The binocular parallax principle and persistence of vision effect are important bases of the naked eye 3D technology. The naked eye 3D technology based on the slit grating plate is realized according to the light splitting principle of the slit grating plate, the separation of parallax images of left and right eyes is realized through the shielding effect of the slit grating plate on light, the left and right eyes respectively see the corresponding parallax images, and the 3D display effect is obtained after the treatment of human brain.
However, in the existing naked eye 3D technology based on the slit grating plate, the design of the whole circuit is simple, and the synchronization signal of the video frame cannot be accurately acquired, so that the finally realized 3D display effect is not good.
Disclosure of Invention
The embodiment of the invention aims to provide a naked eye 3D display method and system so as to improve the naked eye 3D display effect. The specific technical scheme is as follows:
in order to achieve the above object, an embodiment of the present invention provides a naked eye three-dimensional 3D display system, where the system includes: the display screen, the control circuit and the grating plate;
the display screen acquires a video frame and displays the video frame; the video frame comprises a type identifier, wherein the type identifier is an identifier indicating that the video frame is a left-eye video frame or an identifier indicating that the video frame is a right-eye video frame;
the control circuit acquires the type identifier, generates a grating control signal according to the type identifier, and sends the grating control signal to the grating board;
and the grating board changes the opening state of the stripes according to the grating control signal.
Optionally, the control circuit includes: a photoelectric conversion assembly and a control chip;
the photoelectric conversion assembly is arranged in an identification area of the display screen, and the identification area is used for displaying the type identification of the video frame;
the photoelectric conversion assembly senses the light intensity of the identification area, converts the light intensity into an electric signal and sends the electric signal to the control chip;
the control chip generates a grating control signal based on the electrical signal.
Optionally, the control circuit further includes a dc power supply and a relay;
the direct current power supply provides direct current voltage for the relay;
and the relay receives the grating control signal sent by the control chip and provides voltage for the grating plate according to the grating control signal.
Optionally, the relay includes a first relay and a second relay, and the raster control signal includes: odd and even signals;
the first relay receives the odd signal and provides a first voltage for the grating plate according to the odd signal;
and the second relay receives the even signal and provides a second voltage for the grating plate according to the even signal.
Optionally, the step of changing the stripe opening state of the grating board according to the grating control signal includes:
and the grating board changes the starting state of the stripes according to the first voltage or the second voltage.
In order to achieve the above object, an embodiment of the present invention further provides a naked eye 3D display method, which is applied to a naked eye 3D display system, where the system includes: the display screen, the control circuit and the grating plate; the method comprises the following steps:
the display screen acquires a video frame and displays the video frame; the video frame comprises a type identifier, wherein the type identifier is an identifier indicating that the video frame is a left-eye video frame or an identifier indicating that the video frame is a right-eye video frame;
the control circuit acquires the type identifier, generates a grating control signal according to the type identifier, and sends the grating control signal to the grating board;
and the grating board changes the opening state of the stripes according to the grating control signal.
Optionally, the control circuit includes: a photoelectric conversion assembly and a control chip; the photoelectric conversion assembly is arranged in an identification area of the display screen, and the identification area is used for displaying the type identification of the video frame; the method further comprises the following steps:
the photoelectric conversion assembly senses the light intensity of the identification area, converts the light intensity into an electric signal and sends the electric signal to the control chip;
the control chip generates a grating control signal based on the electrical signal.
Optionally, the control circuit further includes a dc power supply and a relay; the method further comprises the following steps:
the direct current power supply provides direct current voltage for the relay;
and the relay receives the grating control signal sent by the control chip and provides voltage for the grating plate according to the grating control signal.
Optionally, the relay includes a first relay and a second relay, and the raster control signal includes: odd and even signals; the method further comprises the following steps:
the first relay receives the odd signal and provides a first voltage for the grating plate according to the odd signal;
and the second relay receives the even signal and provides a second voltage for the grating plate according to the even signal.
Optionally, the step of changing the stripe opening state of the grating board according to the grating control signal includes:
and the grating board changes the starting state of the stripes according to the first voltage or the second voltage.
The naked eye 3D display method and system provided by the embodiment of the invention comprise the following steps: display screen, control circuit and grating board. The display screen acquires and displays the video frame; the video frame comprises a type identifier, wherein the type identifier is an identifier indicating that the video frame is a left-eye video frame or an identifier indicating that the video frame is a right-eye video frame; the control circuit acquires the type identifier, generates a grating control signal according to the type identifier and sends the grating control signal to the grating board; the grating board changes the opening state of the stripes according to the grating control signal. The visible control circuit can acquire the type identification in the video frame in real time, so that the synchronous signal of the video frame is accurately extracted.
Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a naked-eye 3D display system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a type identifier provided in an embodiment of the present invention;
fig. 3 is a schematic diagram of a photoelectric conversion device according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a naked eye 3D display system according to an embodiment of the present invention;
fig. 5 is a flowchart of a naked eye 3D display method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the technical problem that in the existing naked eye 3D technology based on a slit grating plate, the design of an overall circuit is simple, a synchronization signal of a video frame cannot be accurately acquired, and the finally achieved 3D display effect is poor, the embodiment of the invention provides a naked eye 3D display system.
Referring to fig. 1, the naked-eye 3D display system provided by the embodiment of the present invention includes: display screen 101, control circuit 102, grating board 103.
As shown in fig. 1, the display screen 101 is connected to the control circuit 102, and the control circuit 102 is connected to the grating plate 103. In addition, the grating plate 103 is disposed right in front of the display screen 101, and when a human eye views a screen of the display screen 101, a line of sight of the human eye is blocked by the grating plate 103, that is, the line of sight of the human eye passes through the grating plate 103 to reach the display screen 101.
In the embodiment of the present invention, the display screen 101 acquires a video frame and displays the video frame, where the video frame includes a type identifier, and the type identifier indicates that the video frame is a left-eye video frame or indicates that the video frame is a right-eye video frame.
In the embodiment of the invention, in order to realize that human eyes can watch a 3D effect, video frames need to be preprocessed, namely, left-eye video frames and right-eye video frames which are played by a display screen are processed. The left-eye video frame and the right-eye video frame have a certain parallax, and the left eye and the right eye of a person can be synthesized after respectively seeing the processed left-eye video frame and the right-eye video frame, so that a 3D effect is generated.
There are various processes for preprocessing a common video frame to obtain a left-eye video frame and a right-eye video frame, for example, MATLAB software may be used to process the video frame. The present invention does not limit the generation process of the left-eye video frame and the right-eye video frame.
The processed video frames all include type identifiers, and the type identifiers are used for indicating that the processed video frames are left-eye video frames or right-eye video frames.
In an embodiment of the present invention, the type identifier may be a completely black or completely white area in a fixed area of the video frame, and the type identifier may be obtained by an image processing method. Referring to fig. 2, fig. 2 is a schematic diagram of a type identifier provided by an embodiment of the present invention, and as shown in fig. 2, a color of a square area whose length and width at the upper left corner of a video frame are both 1.5cm may be used as the type identifier, where the area is completely black to indicate that the current video frame is a left-eye video frame, and the area is completely white to indicate that the current video frame is a right-eye video frame.
In the embodiment of the invention, the control circuit acquires the type identifier, generates the grating control signal according to the type identifier and sends the grating control signal to the grating plate.
In the embodiment of the invention, the grating board can change the opening state of the stripes according to the grating control signal. Due to the light splitting principle of the grating plate, the left eye and the right eye of a person can respectively see the corresponding video frames, so that a 3D display effect is generated.
Therefore, by applying the naked eye 3D display system provided by the embodiment of the present invention, the control circuit can determine the type of the currently played video frame according to the type identifier in the video frame, and generate the grating control signal based on the type of the currently played video frame, and the grating plate changes the stripe opening state according to the grating control signal. The visible control circuit can acquire the type identification in the video frame in real time, so that the synchronous signal of the video frame is accurately extracted.
In one embodiment of the present invention, the control circuit may include a photoelectric conversion module and a control chip, the photoelectric conversion module is disposed in an identification area of the display screen, and the identification area is used for displaying a type identifier of the video frame. Referring to fig. 3, fig. 3 is a schematic diagram of a photoelectric conversion module according to an embodiment of the present invention, in fig. 3, the photoelectric conversion module is represented by circular shading, and the photoelectric conversion module is disposed in an identification area of a display screen, and the identification area is used for displaying a type identifier of a video frame. When the video frame is played in the display screen, the photoelectric conversion assembly can identify the type of the video frame by sensing the light intensity and send the identification result to the control chip in the form of an electric signal, and the control chip generates a grating control signal according to the electric signal.
In one embodiment of the present invention, the photoelectric conversion element may include a photo-resistor, which senses the light intensity of the mark region of the display and changes its own resistance value, thereby outputting different electrical signals.
In one embodiment of the present invention, the control chip may generate the grating control signal based on the electrical signal. The control chip may be an FPGA (Field-Programmable Gate Array) chip.
In an embodiment of the present invention, the control circuit may further include a dc power supply, a relay, the dc power supply providing a dc voltage to the relay; the relay receives the grating control signal sent by the control chip and provides voltage for the grating plate according to the grating control signal.
In one embodiment of the present invention, the relay may include a first relay and a second relay, and the raster control signal may include: an odd signal and an even signal. The first relay receives the odd signal and provides a first voltage for the grating plate according to the odd signal; the second relay receives the even signal and provides a second voltage for the grating plate according to the even signal.
In an embodiment of the present invention, the grating plate may change the stripe opening state according to the first voltage or the second voltage, and due to the light splitting principle of the grating plate, the left and right eyes of a person can respectively see the corresponding video frames, thereby generating a 3D display effect.
For convenience of understanding, the following description is taken in conjunction with fig. 4, where fig. 4 is a circuit diagram of a naked-eye 3D display system according to an embodiment of the present invention.
As an example, if a video frame currently played by the display screen is a left-eye video frame, a square region with a length and width of 1.5cm at the upper left corner of the video frame is completely black, and the photoresistor can sense the light intensity of the region and change its resistance value to the first resistor, so as to output a first electrical signal to the FPGA chip. The FPGA signal may generate an odd control signal according to the first electrical signal, that is, the odd control signal is set to 1, and the even control signal is set to 0. The first relay receives the odd control signal, and can provide a first voltage for the grating plate according to the odd control signal.
If the video frame currently played by the display screen is a right-eye video frame, the square area with the length of the upper left corner of the video frame being 1.5cm is completely white, the photoresistor can sense the light intensity of the area and change the resistance value of the photoresistor to the second resistor, and therefore the second electric signal is output to the FPGA chip. The FPGA chip can generate an even signal according to the second electric signal, namely the even signal is set to be 1, and the odd signal is set to be 0. The first relay receives the even signal, and then provides a second voltage for the grating plate according to the even signal.
The grating plate can change the opening state of the self stripe according to the first voltage or the second voltage. Due to the light splitting principle of the grating plate, the left eye and the right eye of a person can respectively see the corresponding video frames, so that a 3D display effect is generated.
In an embodiment of the present invention, in order to stabilize the brightness of the grating plate, the voltage provided by the relay to the grating plate is also stable. Specifically, a first voltage provided by the first relay for the grating plate and a second voltage provided by the second relay for the grating plate are both rated voltages of the grating plate.
Therefore, in the embodiment of the invention, the voltage of the control signal is not directly used as the voltage of the grating plate during working, but the rated voltage corresponding to the control voltage is generated, so that as long as the relay is in a working state, the voltages at the two ends of the grating plate are stable, and the better and stable brightness of the grating plate can be ensured.
Based on the above naked eye 3D display system, an embodiment of the present invention further provides a naked eye 3D display method, which may be seen in fig. 5, where fig. 5 is a flowchart of the naked eye 3D display method provided in the embodiment of the present invention, and the method is applied to the naked eye 3D display system, and the system includes: the display screen, the control circuit and the grating plate; may include the steps of:
s501: the display screen acquires and displays the video frame; the video frame comprises a type identifier, wherein the type identifier is an identifier indicating that the video frame is a left-eye video frame or an identifier indicating that the video frame is a right-eye video frame;
s502: the control circuit obtains the type identification, generates a grating control signal according to the type identification, and sends the grating control signal to the grating plate.
S503: the grating board changes the opening state of the stripes according to the grating control signal.
The visible control circuit can acquire the type identification in the video frame in real time, so that the synchronous signal of the video frame is accurately extracted.
In an embodiment of the present invention, the control circuit may further include: a photoelectric conversion assembly and a control chip; the photoelectric conversion assembly is arranged in an identification area of the display screen, and the identification area is used for displaying the type identification of the video frame; the method further comprises the following steps:
the photoelectric conversion assembly senses the light intensity of the identification area, converts the light intensity into an electric signal and sends the electric signal to the control chip;
the control chip generates a grating control signal based on the electrical signal.
In one embodiment of the invention, the control circuit further comprises a direct current power supply and a relay; the method further comprises the following steps:
the direct current power supply provides direct current voltage for the relay;
the relay receives the grating control signal sent by the control chip and provides voltage for the grating plate according to the grating control signal.
In one embodiment of the present invention, the relay includes a first relay and a second relay, and the grating control signal includes: odd and even signals; the method further comprises the following steps:
the first relay receives the odd signal and provides a first voltage for the grating plate according to the odd signal;
the second relay receives the even signal and provides a second voltage for the grating plate according to the even signal.
In an embodiment of the present invention, the step of changing the starting state of the stripe by the grating board according to the grating control signal may specifically include:
the grating board changes the starting state of the stripes according to the first voltage or the second voltage.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. Particularly, for the naked eye 3D display method embodiment, since it is substantially similar to the naked eye 3D display system embodiment, the description is relatively simple, and relevant points can be referred to the partial description of the naked eye 3D display system embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (8)
1. A naked eye three dimensional (3D) display system, the system comprising: the display screen, the control circuit and the grating plate;
the display screen acquires a video frame and displays the video frame; the video frame comprises a type identifier, wherein the type identifier is an identifier indicating that the video frame is a left-eye video frame or an identifier indicating that the video frame is a right-eye video frame;
the control circuit acquires the type identifier, generates a grating control signal according to the type identifier, and sends the grating control signal to the grating board;
the grating board changes the opening state of the stripes according to the grating control signal;
the control circuit includes: a photoelectric conversion assembly and a control chip;
the photoelectric conversion assembly is arranged in an identification area of the display screen, and the identification area is used for displaying the type identification of the video frame;
the photoelectric conversion assembly senses the light intensity of the identification area, converts the light intensity into an electric signal and sends the electric signal to the control chip;
the control chip generates a grating control signal based on the electrical signal.
2. The system of claim 1, wherein the control circuit further comprises a dc power source, a relay;
the direct current power supply provides direct current voltage for the relay;
and the relay receives the grating control signal sent by the control chip and provides voltage for the grating plate according to the grating control signal.
3. The system of claim 2, wherein the relay comprises a first relay and a second relay, the raster control signal comprising: odd and even signals;
the first relay receives the odd signal and provides a first voltage for the grating plate according to the odd signal;
and the second relay receives the even signal and provides a second voltage for the grating plate according to the even signal.
4. The system of claim 3, wherein the step of changing the on state of the stripe by the grating plate according to the grating control signal comprises:
and the grating board changes the starting state of the stripes according to the first voltage or the second voltage.
5. A naked eye three-dimensional (3D) display method is applied to a naked eye 3D display system, and the system comprises: the display screen, the control circuit and the grating plate; the method comprises the following steps:
the display screen acquires a video frame and displays the video frame; the video frame comprises a type identifier, wherein the type identifier is an identifier indicating that the video frame is a left-eye video frame or an identifier indicating that the video frame is a right-eye video frame;
the control circuit acquires the type identifier, generates a grating control signal according to the type identifier, and sends the grating control signal to the grating board;
the grating board changes the opening state of the stripes according to the grating control signal;
the control circuit includes: a photoelectric conversion assembly and a control chip; the photoelectric conversion assembly is arranged in an identification area of the display screen, and the identification area is used for displaying the type identification of the video frame; the method further comprises the following steps:
the photoelectric conversion assembly senses the light intensity of the identification area, converts the light intensity into an electric signal and sends the electric signal to the control chip;
the control chip generates a grating control signal based on the electrical signal.
6. The method of claim 5, wherein the control circuit further comprises a direct current power source, a relay; the method further comprises the following steps:
the direct current power supply provides direct current voltage for the relay;
and the relay receives the grating control signal sent by the control chip and provides voltage for the grating plate according to the grating control signal.
7. The method of claim 6, wherein the relay comprises a first relay and a second relay, and the raster control signal comprises: odd and even signals; the method further comprises the following steps:
the first relay receives the odd signal and provides a first voltage for the grating plate according to the odd signal;
and the second relay receives the even signal and provides a second voltage for the grating plate according to the even signal.
8. The method of claim 7, wherein the step of changing the on state of the stripe by the grating plate according to the grating control signal comprises:
and the grating board changes the starting state of the stripes according to the first voltage or the second voltage.
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