KR20090119129A - Devices and methods for 3-dimensional display - Google Patents

Abstract

PURPOSE: A three-dimensional display device and a display method thereof are provided to easily display the complicated three-dimensional image by using a simple software and a simple device by controlling the blinking and brightness of an LED(Light Emitting Diode). CONSTITUTION: A three-dimensional display device is composed of an LED flat panel(10), a rotation driving unit(20), a blinking control unit(40), and a brightness control unit(50). Plural LEDs are arranged in the LED flat panel. The rotation driving unit includes a motor rotating the LED flat panel. The blinking control unit independently blinks each LED during a rotation cycle at the specific number. The brightness control unit controls the intensity of the light of each LED at a unit of specific bit.

Description

3D image player and playback method {Devices and Methods for 3-dimensional display}

The present invention relates to a three-dimensional image player and a reproduction method. More specifically, each LED is blinked independently by a specific number of times during one rotation cycle of the rotating LED plate, and each LED is independently controlled to adjust the intensity of light by a specific bit unit. By recording the information on when and which LEDs are turned on and adjusting the brightness by 3D simulation recording process and controlling the blinking and brightness of the LEDs using them, even the most complex 3D images can be easily made using simple software and machinery. The present invention relates to a three-dimensional image player and a method of reproducing the LED plate, which can be accurately reproduced and synchronized with the rotation of the LED flat plate and the blinking timing of the flashing control unit so that the LED is always lit at the correct position even if the rotational speed of the motor changes.

Light Emitting Diode (LED) is a kind of semiconductor diode. In 1962, red LEDs using GaAsP compound semiconductors were commercialized. In addition, GaP series green LEDs have been used for electronic devices including information and communication devices. It has been used as a light source for display and image. Since the mid-90s, gallium nitride (GaN) blue LEDs have been developed to enable full-color displays using LEDs, which have begun to take place in our lives.

Like ordinary semiconductor devices, the LED device itself is called a chip, and its size is usually very small, a few hundred micrometers. LED is basically composed of junction of p-type and n-type semiconductor, and is a kind of optoelectronic device that emits energy corresponding to bandgap of semiconductor in the form of light by applying electron and hole when voltage is applied. When forward voltage is applied to the p-n junction, the electrons of the n-type semiconductor and the holes of the p-type semiconductor are injected into the p-side and the n-side, respectively, and are diffused as minority carriers. Their minority carriers recombine with the majority carriers in the diffusion process and emit light corresponding to the energy difference between the bonding electrons and holes.

It has already been introduced that by arranging such LEDs in a row or in a row and rotating them, a three-dimensional effect can be produced using the afterimage effect of human vision. However, looking at the contents of them, most of the arrangement of the LED or the rotating device itself.

In order to express the desired letter or picture using the LED array, the key technology is when and where the LED should be blinked. In particular, in order to play a 3D video naturally, it is necessary to be able to control the blinking of the LED at each position in the unit of several milliseconds (ms), and the brightness control as well as the blinking control is necessary.

In addition, in order to accurately reproduce the 3D video, the angular velocity of the motor that provides the rotational force to the LED array board and the timing of the LED blinking at every moment should be well matched with each other. Therefore, there is a need for a means to ensure that the corresponding LED is always lit in the correct position even if the rotation speed of the motor changes.

The present invention has been made to solve the above problems, in particular, to implement a three-dimensional video by using the after-image effect of human vision, and information on which LED to turn on and adjust the brightness by the three-dimensional simulation recording process By controlling the blinking and brightness of the LED and using it, you can easily and accurately play back even the most complex three-dimensional images using simple software and machinery.The rotation of the motor by synchronizing the rotation of the LED flat plate and the blinking timing of the blinking controller. The purpose is to provide a three-dimensional image player and a playback method so that the LED is always lit at the correct position even if the speed changes.

In order to achieve the above object, a three-dimensional image player according to the present invention comprises: an LED flat panel in which a plurality of light emitting diodes (LEDs) are arranged; A rotation driver including a motor to rotate the LED flat plate; A flashing controller for independently blinking each of the LEDs a specific number of times during one rotation period of the LED plate; And a brightness controller configured to independently adjust the intensity of the light by a specific number of times for each LED independently during a single rotation period of the LED flat plate.

In addition, the LED flat plate may be arranged in a matrix (matrix) shape.

The 3D image player may further include a synchronizer for synchronizing the rotation of the LED plate and the blink timing of the blink controller.

In addition, the synchronization unit includes a reflecting plate painted at an angle interval of 360 degrees / F with different reflectivities from each other, and a reflecting sensor that senses a change in reflectivity while rotating the upper portion of the reflecting plate so that the LED lighting information is changed whenever the reflectivity is changed. You can read it.

The 3D image player may further include a cylindrical housing surrounding the LED flat plate.

In addition, the reflector may be provided on the top or bottom or side surfaces of the housing.

In addition, the reflection sensor may be provided at the top or bottom or side of the LED flat plate.

The three-dimensional image reproducing method according to the present invention comprises the steps of (a) putting a three-dimensional solid to be reproduced in a virtual cylinder; (b) establishing a virtual LED plate within the virtual cylinder; (c) recording the unique number of each LED and the color and brightness to be reproduced with respect to the LEDs in a position closest to the curve on the two-dimensional plane consisting of intersections of the three-dimensional solid and the LED flat plate; And (d) rotating the LED plate by a specific angle.

In addition, the three-dimensional image reproducing method (e) repeats the steps (c) and (d) to perform a three-dimensional simulation recording, the unique number and color of each LED according to the rotation angle of the LED flat plate and The method may further include storing brightness information in the memory.

The 3D image reproducing method may further include (f) reproducing a 3D video while controlling the color and brightness of each LED according to the information stored in the memory while rotating the LED flat plate.

According to the present invention, a three-dimensional video is generated by using the afterimage effect of human vision by flashing each LED independently by a specific number of times during one rotation period of the rotating LED plate and independently controlling the intensity of light by a specific bit unit. There is an effect that can be implemented.

In addition, according to the present invention by recording the information about when to turn on and control the brightness of the LED by the three-dimensional simulation recording process and by using it to control the blinking and brightness of the LED, no matter how complicated using simple software and machinery Even stereoscopic images can be reproduced easily and accurately.

In addition, according to the present invention by synchronizing the rotation of the LED plate and the flashing timing of the flashing control unit there is an effect that the LED can be always lit at the correct position even if the rotational speed of the motor changes.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

First, a 3D image player according to an embodiment of the present invention will be described.

1 is a perspective view of a 3D video player according to an embodiment of the present invention, FIG. 2 is a block diagram of a 3D video player according to an embodiment of the present invention, and FIG. 3 is according to an embodiment of the present invention. Fig. 3 is a perspective view showing the reproduction of a stereoscopic image by a three-dimensional image player.

1 and 2, the 3D image player according to an exemplary embodiment of the present invention includes an LED flat panel 10, a rotation driver 20, a flashing controller 40, and a brightness controller 50. . In addition, the 3D image player may further include a housing 30.

The LED flat panel 10 is a plurality of light emitting diodes (LEDs) arranged in an array form, and reproduces a 3D image by using a visual afterimage effect of rotation. In the LED flat panel 10, the LEDs may be arranged in a matrix form of M rows and N columns, and the arrangement of the LEDs is not limited thereto. Here, M and N are determined in consideration of the resolution of the 3D image to be reproduced.

The rotation drive unit 20 includes a motor for rotating the LED flat plate. The rotation drive unit 20 includes a rotation shaft coupled to the lower center portion of the LED flat plate, and a motor connected to the rotation shaft. The motor of the rotation drive unit 20 rotates at a speed of R rotation or more per second, and R is preferably 15 or more times in consideration of the afterimage effect.

The housing 30 is formed in a shape surrounding the LED flat plate 10. The housing 30 protects the user from the LED plate 10 that rotates at high speed and serves as a reflector to be described later. At this time, the housing 30 is preferably formed to be detachable, it is preferable that the transparent material. The housing 30 may be formed in a cylindrical shape as shown in FIG. 1, and although not shown, may be formed in other shapes including a spherical shape.

The flashing control unit 40 serves to independently flash each LED by a specific number F during one rotation period of the LED flat plate 10. When the LED flat plate 10 rotates R times per second, one rotation cycle of the LED flat plate 10 is 1 / R seconds, and each LED is individually turned on and off for 1 / R seconds. For example, if the LED flat plate 10 rotates 15 times per second and each LED blinks 60 times in one rotation, the one-turn cycle of the LED flat panel 10 will be 1/15 ≒ 0.067 seconds and each LED will turn 60 times during 0.067 seconds. Will flash.

When each LED is turned on or off to make one flashing state as a whole, this becomes one still image frame. Since each LED blinks F times in one rotation, assuming that F still image frames gather to form one video frame, one video frame is made by one rotation of the LED flat panel 10. Therefore, one still image frame is formed each time the LED flat plate 10 rotates at an angle of 360 degrees / F. For example, when each LED flashes 60 times in one rotation of the LED flat panel 10, 60 still image frames constitute one video frame, and one still image is displayed every time the LED flat panel 10 rotates 6 degrees. The frame is made.

In order to flash each LED as described above, the flash control unit 40 reads the flashing information already stored in the memory and controls the flashing of the LED. To this end, when the 3D image to be played is determined, 3D simulation recording is performed to store flashing information of each LED in memory in advance. This will be described later in the description of FIG. 6.

The brightness controller 50 controls the brightness of each LED by individually adjusting the intensity of the light by a specific number of times in units of a specific bit for one rotation period of the LED flat plate 10. In addition to turning on and off each LED individually through the flashing control unit 40, the brightness control unit 50 adjusts the intensity of light F for one rotation period so that an image close to natural colors can be expressed. For example, the brightness controller 50 may express the brightness of each LED in units of 8 bits (0 to 255 levels) or 16 bits (0 to 65535 levels).

Like the flashing control unit 40, the brightness control unit 50 also controls the brightness of the LED by reading the brightness information already stored from the memory. To this end, the brightness information is stored in the memory through 3D simulation recording, which will be described later with reference to FIG. 6.

Referring to FIG. 3, the 3D image is reproduced by controlling the blinking and the brightness of each LED element by the flashing control unit 40 and the brightness control unit 50 while rotating the LED flat panel 10 through the rotation driving unit 20. 3 shows a specific still image frame, and the still image frames are collected to form a video frame.

Next, a three-dimensional image player according to another embodiment of the present invention will be described.

4 is a partial perspective view of a 3D image player according to another embodiment of the present invention. Since the embodiment of FIG. 4 is similar to the embodiment of FIG. 2 except that it further includes a synchronization unit for synchronization, a description will be mainly given of differences.

According to another embodiment of the present invention, referring to FIG. 4, the 3D image player further includes a synchronizer 60.

The synchronizer 60 plays a role of synchronizing the rotational speed of the LED flat plate 10 and the number of flashes per one rotation period of the flashing controller. When recording the 3D simulation to be described later, the flashing information of each LED was recorded at the correct speed of R rotations per second and F flashes per rotation, but the LED flat panel 10 is driven by the motor of the rotational drive, so no matter how accurately the motor is controlled. Even so, it's hard to achieve a full R revolutions per second. Therefore, it is preferable that a synchronizer 60 is provided for synchronizing the flashing information recorded in the memory with the rotational speed of the motor.

The synchronizer 60 includes a reflecting plate 62 and a reflecting sensor 64.

The reflecting plate 62 is painted with a different reflectivity from each other at an angular interval of 360 degrees / F. The reflecting plate 62 may be provided on the upper plate, the lower plate, or the side surface of the housing 30. For example, the reflecting plate 62 is provided on the lower plate of FIG. 4. When the circuit is configured to flash the F LED per revolution of the motor, the reflector 62 is painted with different reflectivity so as to divide the revolution by F equally.

The reflection sensor 64 detects a change in reflectivity while rotating the upper portion of the reflection plate 62. To this end, the reflection sensor 64 may be provided at the top or bottom or the side of the LED flat plate 10, for example, is provided at the bottom of the LED flat plate 10 in FIG. 4.

When the LED flat plate 10 rotates, the reflection sensor 64 also rotates the upper part of the reflection plate 62, and the reflection sensor 64 detects the change in reflectivity and sends a detection signal to the blinking control unit 40 whenever the reflectivity changes. To pass. The flashing controller 40 reads the LED blinking information from the memory every time a detection signal is transmitted from the reflection sensor 64 to perform blinking. In this way, the LED can be always lit at the correct position even if the rotational speed of the motor changes.

Next, a three-dimensional image reproduction method according to an embodiment of the present invention will be described.

5 is a flowchart of a 3D image reproducing method according to an embodiment of the present invention, and FIG. 6 is a flowchart of a 3D simulation recording step of FIG. 5.

In the three-dimensional image reproducing method according to an embodiment of the present invention, referring to Figure 5, the three-dimensional simulation preparation step (S100), three-dimensional simulation recording step (S200), the step of reproducing the three-dimensional image (S300) It is made to include. Hereinafter, one 'still image frame' means that each LED is turned on or off to form one flashing state as a whole (in the case of a lit state, it may include a brightness level), and one 'video frame' is still It is used to mean that the F frame is composed of.

Step S100 is a step of preparing a three-dimensional stereoscopic and virtual cylinder and a virtual LED flat plate to be reproduced to perform three-dimensional simulation recording. In step S100, the three-dimensional solid to be reproduced is put in a virtual cylinder, and a virtual LED flat plate is set in the virtual cylinder. At this time, the three-dimensional three-dimensional three-dimensional can be a variety of things, including moving objects, objects that change color with the passage of time, objects that change brightness with the passage of time.

Referring to FIG. 6, step S200 is a step of storing flashing information and brightness information of each LED in a memory through 3D simulation recording.

In step S210, the video frame number is initialized. For example, the video frame number is set to zero.

In step S220, the still image frame number is initialized. For example, the still image frame number is set to zero.

Step S230 is a step of recording the unique number of each LED and the color and brightness to be reproduced with respect to the LEDs of the nearest position and the curve on the two-dimensional plane composed of the intersections of the three-dimensional solid and the LED flat plate. That is, it records what color and brightness should be output to which LED every 1 rotation period / F second through a table, etc., and stores the recorded table in the memory of the actual circuit. For example, if a part of the three-dimensional stereoscopic outline to be reproduced meets the LED element at the position (5,2) of the LED plate, and the color to be reproduced is green (G), and the brightness is 12 of the 8-bit levels, the memory may be " Information such as unique number_G_00001100 "of the LED at position (5,2) is stored. Repeat this process for each node.

Step S240 is to rotate the LED flat plate by 360 degrees / F. When the recording of the LED information for the LED flat plate of a certain angle is completed in step S230 and one still picture frame is made, the LED flat plate is rotated to make the next still picture frame.

In step S250, the still image frame number is increased by +1.

Step S260 is a step of determining whether or not the still picture frame number has reached F. When the still image frame number reaches F, the still image frame belonging to one video frame is completed. After increasing the still image frame number by +1, it is determined whether the still image frame number is equal to F. If it is determined that the still image frame number is not F, the process returns to step S230 to record each LED reproduction information at the corresponding angle in the memory, rotates the LED flat plate (S240), and repeats the process of increasing the still image frame number by +1. do.

On the other hand, if it is determined that the still image frame number is F, it is determined that recording of still image frames belonging to one video frame is completed, and the process proceeds to step S270 and increases the video frame number by +1.

Step S280 is a step of determining whether the video frame number is the last number. For example, when the LED flat plate rotates 15 times per second and the LED flat plate is rotated 1500 times for playback for 100 seconds, it is determined in step S280 whether the video frame number is 1500. If it is determined that the moving picture frame number is not the last number, the process returns to step S220 to repeat the step of recording the still picture frames belonging to the moving picture frame. On the other hand, if the moving picture frame number is the last number, the 3D simulation recording is completed.

Step S300 is a step of playing a 3D video while controlling the color and brightness of each LED while actually rotating the LED flat plate using the information stored in the 3D simulation recording result memory of step S200. Although not shown, step S300 may be performed while synchronizing the flashing control to the rotational speed of the LED flat plate so that the LED blinks at the correct position at all times even if the rotational speed of the motor changes. 7A shows an original image before 3D simulation recording, and FIG. 7B shows an image reproduced on a computer after 3D simulation recording.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

The present invention relates to three-dimensional image reproduction, and can be applied to display fields of various uses, such as advertising, entertainment, night lighting, and in particular, by using this to reproduce the three-dimensional video can produce a colorful and fantastic feeling.

1 is a perspective view of a three-dimensional image player according to an embodiment of the present invention,

2 is a block diagram of a 3D video player according to an embodiment of the present invention;

3 is a perspective view showing a state in which a stereoscopic image is reproduced by a 3D image player according to an embodiment of the present invention;

4 is a partial perspective view of a three-dimensional image player according to another embodiment of the present invention;

5 is a flowchart of a 3D image reproducing method according to an embodiment of the present invention;

6 is a flowchart of a three-dimensional simulation recording step of FIG.

7A is an original image before 3D simulation recording,

7B is an image reproduced by a computer after 3D simulation recording.

<Description of the symbols for the main parts of the drawings>

10-LED flat panel 20-Rotary drive

30-housing 40-flashing control

50-brightness control

Claims (10)

An LED plate on which a plurality of light emitting diodes (LEDs) are arranged; A rotation driver including a motor to rotate the LED flat plate; A flashing controller for independently blinking each of the LEDs a specific number of times during one rotation period of the LED plate; And Brightness control unit for controlling the light intensity of each LED independently by a specific bit unit for one rotation period of the LED flat plate by the specific number of times F 3D video player comprising a. The method of claim 1, The LED is a three-dimensional image player, characterized in that the LED is arranged in a matrix (matrix) shape. The method of claim 1, And a synchronization unit for synchronizing the rotation of the LED flat panel and the blink timing of the blink control unit. The method of claim 3, The synchronizing unit includes a reflecting plate painted at 360-degree / F colors having different reflectivity from each other, and a reflecting sensor that detects a change in reflectivity by rotating the upper reflector, thereby reading the LED lighting information whenever the reflectivity changes. 3D video player, characterized in that. The method of claim 4, wherein And a cylindrical housing surrounding the LED flat plate. The method of claim 5, The reflector is a three-dimensional image player, characterized in that provided on the top or bottom or side surfaces of the housing. The method according to claim 5 or 6, The reflection sensor is a three-dimensional image player, characterized in that provided on the top or bottom or side of the flat plate. (a) putting a three-dimensional solid to be reproduced into a virtual cylinder; (b) establishing a virtual LED plate within the virtual cylinder; (c) recording a unique number of each LED, a color to be reproduced, and a brightness to be reproduced for LEDs at a position closest to a curve on a two-dimensional plane consisting of intersections of the three-dimensional solid and the LED flat plate; And (d) rotating the LED plate by a certain angle 3D image playback method comprising a. The method of claim 8, (e) repeating steps (c) and (d) to perform 3D simulation recording, and storing the unique number, color, and brightness information of each LED according to the rotation angle of the LED flat panel in a memory. 3D video playback method characterized in that it further comprises. The method of claim 9, and (f) reproducing a three-dimensional video while controlling the color and brightness of each LED according to the information stored in the memory while rotating the actual LED flat panel.

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