KR101296232B1 - Multiview switchable three dimensional display apparatus - Google Patents

Abstract

PURPOSE: A multi-view switchable stereoscopic image display device is provided to selectively change 2-dimensional image and 3-dimensional image according to the operation of a liquid crystal display (LCD) barrier screen and to watch it. CONSTITUTION: A multi-view switchable stereoscopic image display device comprises an inclined LCD barrier screen driving unit (30) and an interlacing variable storage unit (40). The inclined LCD barrier screen driving unit is connected with an inclined LCD barrier screen and controls the inclined LCD barrier screen so that all incident lights are transmitted in a 2-dimensional mode and a parallax barrier is formed in a 3-dimensional mode. The interlacing variable storage unit stores an interlacing variable value which is inputted to a pixel per inch list of a display element, a tilted angle of an inclined barrier, a resolution list of a display, and an inch per barrier line list which is the area of an opening unit for a blocking unit of the barrier. The interlacing variable storage unit codes the interlacing variable value for providing a 3-dimensional stereoscopic image to the display element and stores it. [Reference numerals] (AA) Image signal

Description

MULTIVIEW SWITCHABLE THREE DIMENSIONAL DISPLAY APPARATUS}

The present invention relates to a multi-view switchable stereoscopic image display apparatus, and more particularly, a multi-view switchable stereoscopic image display capable of viewing 2D images at high resolution while implementing high resolution stereoscopic images at various viewing angles without degrading the resolution. Relates to a device.

The three-dimensional (3D) image uses two images for the left eye and the right eye to generate a binocular disparity so that the user can feel a three-dimensional feeling with respect to a subject on the screen. In recent years, It is in the limelight.

As a method of displaying a three-dimensional image, there are a spectacle type and a non-eye type in order. The spectacle method is distinguished by a polarized filter and a time-division method, and the non-spectacular method is a parallax method and a holographic method which reproduces a wave surface of a three-dimensional object. The holographic method is currently being studied due to the large size of data and difficulty in actual implementation, and the commercially available method is the parallax method. Typical examples of the parallax method include a lenticular method and a parallax barrier method.

In the non-eyeglass system, the parallax barrier system is a system in which a filter called a barrier screen is installed and the left and right images are arranged alternately at appropriate intervals to separate and recognize the left and right images. 1 is a schematic cross-sectional view of a stereoscopic image display apparatus of a parallax barrier system. 1, the display panel 10 is formed with a left-eye pixel L for displaying left-eye image data and a right-eye pixel R for displaying right-eye image data alternately, A backlight 20 is provided. The parallax barrier 30 is positioned between the display panel 10 and the observer 40 or between the display panel 10 and the backlight 20 to transmit or block light according to the position. The slit 32 and the barrier 34, which selectively pass the light from the pixels L and R, respectively, exist in a stripe form in the longitudinal direction with respect to the observer. The light L1 that has passed through the left eye pixel L of the display panel 10 among the light emitted from the backlight 20 passes through the slit 32 of the parallax barrier 30 to the left side of the observer 40 And the light R1 passing through the right eye pixel R of the display panel 10 reaches the right eye of the observer 40 through the slit 32 of the parallax barrier 30. The observer 40 recognizes the three-dimensional stereoscopic image because there is enough parallax information that the human being can sufficiently perceive the image displayed through the left and right eye pixels L and R, respectively.

The parallax barrier type stereoscopic image display device according to the prior art is configured by arranging a parallax barrier manufactured by printing a barrier film on a film in front of the display device. However, such a film-type parallax barrier is difficult to remove once installed, and even if detached, it is cumbersome to re-install through alignment, so the stereoscopic display device equipped with the parallax barrier can only watch stereoscopic images or view two-dimensional images. Even if the image quality is significantly degraded there is a problem that viewing is inconvenient.

The present invention is to overcome the above-mentioned problems of the prior art, one object of the present invention is to implement a high-resolution stereoscopic image at various viewing angles, multi-view switching that can be switched to view the 2D image without degradation of resolution It is possible to provide a stereoscopic image display apparatus.

One aspect of the present invention for solving the above technical problem is
A multi-view switchable stereoscopic image display device,
A diagonal LCD barrier screen attached to the display device at a predetermined distance from the display device; A diagonal LCD barrier screen driver connected to the diagonal LCD barrier screen to control the diagonal LCD barrier screen to transmit all incident light in 2D mode and to form a parallax barrier in 3D mode; The input to be input to the inch per pixel (PPI) item of the display element, the inclined angle item of the diagonal barrier, the resolution item of the display, and the inch per barrier line (LPI) item, the width of the opening to the barrier of the barrier, respectively. An interlacing variable storage unit for encrypting and storing an interlacing variable value for providing a 3D stereoscopic image to the display element, and storing the racing variable value; a display connected to the display element to control driving of the display element An element driver; And controlling the operation of the display element driver and the diagonal LCD barrier screen driver, receiving 2D or 3D image data, determining whether the display device is 2D image data or 3D image data, and determining the diagonal LCD screen barrier according to the determination result. A main control unit for generating a control signal;
The diagonal LCD barrier screen driver
A microcomputer that controls switching between 2D and 3D modes of the diagonal LCD barrier screen;
An input / output connector for connecting an external device;
A bus connector connecting each module;
An expansion connector provided to the outside so that the user can expand and use the remaining ones except those used for the operation of the module among the built-in input / output devices of the microcomputer;
An I2C communication line connecting the bus connector and the microcomputer; And
An interface circuit unit connected to the microcomputer and supporting an input / output operation for driving an external device connected to the input / output connector;
A voltage converter which lowers the voltage supplied from the bus connector to an appropriate voltage and provides the voltage to the outside through the input / output connector; And
A memory unit connected to the microcomputer and storing a parameter to be used in the LCD barrier screen driver module;

The diagonal LCD barrier screen driver is a multi-view switchable stereoscopic image , which is programmed in an event manner and is a communication port for multi-view switching control configured to enable computer-based control and monitoring when connected to an external computer. It relates to a display device.

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According to the stereoscopic image display apparatus according to the present invention, it is possible to implement a high resolution 3D stereoscopic image at various viewing angles without wearing glasses. Also, by using a quadratic LCD barrier screen as a parallax barrier, it is possible to selectively switch between a 2D image and a 3D image according to whether an LCD barrier screen is operated or not, and to view a high resolution image without deteriorating image quality even in 2D mode .

In addition, it is advantageous that a linear barriers screen is attached to an ordinary display and converted into a 3D stereoscopic display, thereby achieving high profit by recycling the ordinary display.

1 is a schematic cross-sectional view for explaining the construction and operation principle of a stereoscopic image display apparatus of a general parallax barrier system.
2 is a schematic block diagram of a multi-view switchable stereoscopic image display apparatus according to an embodiment of the present invention.
3A and 3B illustrate a three-dimensional image providing using a diagonal LCD barrier screen.
4 is a diagram illustrating a screen for implementing a multi-view stereoscopic image by attaching a diagonal LCD barrier screen to a display device according to an embodiment of the present invention and then arbitrarily adjusting interlacing parameter values.
FIG. 5 is a detailed circuit diagram of a diagonal LCD barrier screen driver of the multi-view switchable stereoscopic image display device of FIG. 2.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In order to clearly illustrate the present invention in the drawings, parts not related to the description are omitted.

2 is a schematic block diagram of a multi-view switchable stereoscopic image display apparatus according to an embodiment of the present invention.

As shown in FIG. 2, the multi-view switchable stereoscopic image display device according to an embodiment of the present invention is a device capable of selectively displaying a multi-view 2D image and a 3D image, and includes a display element 10 and a diagonal line. And an LCD barrier screen 20, a diagonal LCD barrier screen driver 30, an interlacing variable storage 40, a display element driver 50, and a main controller 60.

Multi-view switchable stereoscopic image display device according to an embodiment of the present invention is a display element 10 for displaying 2D or 3D image data, a diagonal LCD barrier screen 20 attached to be spaced apart from the display element 10 a predetermined distance ; A diagonal LCD barrier screen driver 30 connected to the diagonal LCD barrier screen 20 to control the diagonal LCD barrier screen to transmit all incident light in 2D mode and form a parallax barrier in 3D mode; (LPI) item, which is the width of the opening portion with respect to the blocking portion of the barrier, and the number of inches per inch (PPI) And an interlacing variable storage unit 40 for storing interlacing variable values to be input, respectively, and for encrypting and storing interlacing variable values for providing a three-dimensional image to the display device.

The display device 10 displays 2D or 3D image data, and the display device 10 displays stereoscopic image data of multiple points under the control of the display device driver 30. In this case, the display element 10 may be a flat panel display panel, for example, a liquid crystal display device, a plasma display device, an OLED display device, or the like.

The display element 10 includes a plurality of left eye pixels and a plurality of right eye pixels, and the diagonal LCD barrier screen 20 is implemented in a parallax barrier manner, and is arranged to correspond to the left eye pixels and the right eye pixels. It includes.

The diagonal LCD barrier screen 20 is disposed on the display element 10 to transmit a multi-view image displayed on the display element 10. As the diagonal LCD barrier screen 20, a liquid crystal display device is used. At the same time, the diagonal LCD barrier screen 20 is arranged spaced apart from the display element 10 at intervals of about 5 mm to about 12 mm. The diagonal LCD barrier screen 20 includes an aperture through which light repeatedly arranged alternately and a barrier to block light are provided. The barrier is composed of liquid crystal cells, and optionally, transparent or opaque cells. Driven.

The openings and the barrier are arranged at an angle and are inclined by 70 to 80 degrees with respect to the row direction of the LCD barrier screen 20. [ As such, when the openings and the barriers are formed to be inclined at 70 to 80 degrees with respect to the row direction of the diagonal LCD barrier screen, the horizontal resolution and the brightness can be prevented from being lowered even if the number of viewpoints is increased.

The diagonal LCD barrier screen driver 30 controls the on / off operation of the diagonal LCD barrier screen 20 to switch the display element 10 to a 2D or 3D display device.

The display element driver 50 is connected to the display element 10 to control the driving of the display element 10, and the main controller 60 is the display element driver 50 and the diagonal LCD barrier screen driver. The controller 30 controls the operation of the controller 30, receives 2D or 3D image data, determines whether the 2D image data or the 3D image data is generated, and generates a control signal for the diagonal LCD screen barrier screen driver 30 according to the determination result. .

Referring to FIG. 3 (a), the stereoscopic image display apparatus of the present invention sequentially provides pixels per frame of each of 8 to 9 moving images to subpixels (RGB) of the LCD through a slanted step barrier. do. The diagonal LCD barrier screen 20 is configured such that neighboring subpixels are visible in one diagonal direction. Referring to FIG. 3 (b), the red (R) of the first subpixel at the first time point is displayed in the final output image. The red of the first pixel is selected, and the green of the third pixel of the first view is selected as the green of the sixth pixel of the final output image.

According to FIG. 3, the diagonal LCD barrier screen 20 is installed at a predetermined distance from the display element 10, and the pixels per frame of each of the eight moving images are sequentially sprayed with LCD subpixels, and the diagonal step barrier Since the interlacing structure varies according to the slope of, the information on the slope serves as an important element in the stereoscopic image.

According to the present invention, the position of the aperture and the width of the slit are determined according to the multi-view point, the viewing distance, and the width of the image. Pixels contributing to different viewing areas are different, and by displaying different image data with these pixels, different images are displayed at different viewing areas, thereby implementing a multiview stereoscopic image display apparatus. When the diagonal LCD barrier screen 20 is configured as shown in FIG. 4A, the synthesis result of the multiview image is arranged as shown in FIG. 4B according to Equation 1.

[Equation 1]

H (x, y, c) = _Gm (x, y, c)

m = 1 + (3x + c-y% n)% n

H (x, y, c): Subpixel value of the final output image

G _m (x, y, c): the subpixel value of the mth viewpoint image

(x, y): pixel position of the final output image

c: The suffix of the color (for example, 0 for red (R), 1 for green (G), 2 for blue (B)

n: total number of repeat points

m: subscript of a multiview image

4 is a screen for implementing an accurate multiview stereoscopic image by attaching an oblique barrier screen to a display and then arbitrarily adjusting interlacing parameter values according to an embodiment of the present invention. Hereinafter, a screen for implementing a multiview stereoscopic image by arbitrarily adjusting interlacing variable values according to an embodiment of the present invention will be described in detail with reference to FIG. 4.

According to FIG. 4, the interlacing variable includes a display pixel per inch (PPI) item, an angle item, a display horizontal resolution item, a display vertical resolution item, a barrier LPI item, a multi-view item, an offset item, and an LPI per inch (LPI) item. Contains a range item.

The display horizontal resolution item means the horizontal resolution of the display element, and the vertical resolution item of the display means the vertical resolution of the display element. The barrier LPI item inputs the interlacing variable according to the aperture of the linear step barrier and the width of the barrier, and when the number of the re-points is plural, the number of the re-points is inputted.

The offset item inputs the distance viewed by the viewer from the diagonal step barrier. In general, the distance between the display element and the diagonal LCD barrier screen and the offset are proportional to each other. The LPI range item is related to the barrier LPI item, and the variable value is input in the range of 0.001 to 10 units. After the user inputs the above-described interlacing variable values, a generation menu (Generate) is selected, and a stereoscopic image to which the above-described interlacing variable values are applied is generated. The user can encrypt and store the interlacing variable values associated with the generated stereoscopic image, and if necessary, decrypt the encrypted variable values and read them.

In one embodiment of the present invention, it is possible to implement a two-dimensional or three-dimensional image by using a diagonal LCD barrier screen. 5 is a detailed circuit diagram of a diagonal LCD barrier screen driver 30 for implementing a two-dimensional image and a three-dimensional image interchangeably in the multi-view switchable stereoscopic image display apparatus of the present invention.

In the present invention, the quadrilateral barrier screen 20 is implemented using liquid crystal, and when power is applied to the liquid crystal, some pixels act as a barrier by blocking / absorbing light emitted from the backlight, In addition, the remaining pixels to which power is not applied act as a slit of a parallax barrier to realize a stereoscopic image. On the other hand, when power is not applied to the liquid crystal of the diagonal LCD barrier screen 20, the parallax barrier is not formed, and the same image is transmitted to the right eye and the left eye of the viewer, thereby displaying a high-quality two-dimensional image.

The diagonal LCD barrier screen driver 30 is programmable in an event manner, and is configured to enable computer-based control and monitoring when connected to an external computer, and functions by connecting several small modules to a communication bus. It may be an extensible multi-point switching control communication port. The communication port provides the EventBus_C framework to be programmed not only by the conventional scan method in C language but also by the event method, and the EventBus_dotnet library. It can be a controller. Since it can be programmed in the event method as described above, when a specific event occurs according to the content of the video can be automatically programmed to switch from 2D mode to 3D mode or from 3D mode to 2D mode to display a stereoscopic image.

Referring to FIG. 5, the diagonal LCD barrier screen driver 30 includes a microcomputer 44 for controlling switching between 2D and 3D modes of the diagonal LCD barrier screen; An input / output connector (41) for connecting an external device; A bus connector (42) connecting each module; An expansion connector (43) for externally supplying the remainder of the built-in input / output devices of the microcomputer except for the operation of the module, so that the extension can be used by the user; An I < 2 > C communication line (45) connecting the bus connector and the microcomputer; An interface circuit unit 47 connected to the microcomputer and supporting an input / output operation for driving an external device connected to the input / output connector; A voltage converter 47 for down-converting the voltage supplied from the bus connector to an appropriate voltage and providing the voltage to the outside through the input / output connector; And a memory unit 48 connected to the microcomputer and storing parameters to be used in the LCD barrier screen driver module.

The input / output connector 41 is a connector for connecting external devices such as a switch, a lamp, and a motor, and a plug-and-header type terminal block can be used. Each module of the diagonal LCD barrier screen driver 30 may operate independently, but may be connected to the IDC connector and the flat cable through the bus connector 42 to perform more complicated functions. I2C communication, VAA logic power supply (5V), VBB input / output power supply (24V), ground, and system reset signal lines are allocated to the connector.

The expansion connector 43 is a connector for providing the exterior of the built-in input / output device of the microcomputer 44 except for the operation of the module, so that the user can extend the use of the expansion connector 43. The expansion connector 43 includes a power source, a UART, a JTAG SWD, And so on. All functional modules include a 32-bit ARM CORTEX-M0 family of low-power LPC111X microcontrollers. The user can easily and quickly create a user program in the event method using the EventBus_c framework in the flash of the microcomputer 44.

The I2C communication line 45 connects each module to the I2C communication line 45 of the two lines SDA and SCL in the bus connector 42. Using FM + (Fast Mode Plus) mode, each module is connected with high-speed communication of 1 Mbps to exchange events between modules. The interface circuit unit 47 is a circuit unit that supports an input / output operation for driving an external device connected to an input / output connector of each module. For example, the interface circuit unit 47 includes a switch input circuit, a relay driving circuit, a motor driving circuit, .

The voltage converter 45 is a DC / DC converter which downs the VBB 24V supplied from the bus connector 42 to an appropriate voltage (by rotating the variable resistor in the module by the user) so that the user can operate the external device The variable power supply is provided to the outside through the input / output connector so that it can be used. The variable range is about 1.5V to 20V.

The memory unit 48 is an EEPROM or the like and provides a storage space for storing a parameter to be used in the module such as an ID (communication address) of the module. It is possible to control the operation of the program by changing the parameter stored in the memory unit 48 through the UART or the like at any time after the development and download of the program.

The stereoscopic image display apparatus of the present invention can display both 2D and 3D images in high quality, and can be applied to various fields such as medical images, games, advertisements, education, military, broadcasting, projectors, mobile phones, and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the appended claims.

10: Display element
20: diagonal LCD barrier screen
30: diagonal LCD barrier screen drive unit
40: Interlacing variable storage unit
50:
60:

Claims (7)

A multi-view switchable stereoscopic image display device,
A diagonal LCD barrier screen attached to the display device at a predetermined distance from the display device; A diagonal LCD barrier screen driver connected to the diagonal LCD barrier screen to control the diagonal LCD barrier screen to transmit all incident light in 2D mode and to form a parallax barrier in 3D mode; The input to be input to the inch per pixel (PPI) item of the display element, the inclined angle item of the diagonal barrier, the resolution item of the display, and the inch per barrier line (LPI) item, the width of the opening to the barrier of the barrier, respectively. An interlacing variable storage unit for encrypting and storing an interlacing variable value for providing a 3D stereoscopic image to the display element, and storing the racing variable value; a display connected to the display element to control driving of the display element An element driver; And controlling the operation of the display element driver and the diagonal LCD barrier screen driver, receiving 2D or 3D image data, determining whether the display device is 2D image data or 3D image data, and determining the diagonal LCD screen barrier according to the determination result. A main control unit for generating a control signal;
The diagonal LCD barrier screen driver
A microcomputer that controls switching between 2D and 3D modes of the diagonal LCD barrier screen;
An input / output connector for connecting an external device;
A bus connector connecting each module;
An expansion connector provided to the outside so that the user can expand and use the remaining ones except those used for the operation of the module among the built-in input / output devices of the microcomputer;
An I2C communication line connecting the bus connector and the microcomputer; And
An interface circuit unit connected to the microcomputer and supporting an input / output operation for driving an external device connected to the input / output connector;
A voltage converter which lowers the voltage supplied from the bus connector to an appropriate voltage and provides the voltage to the outside through the input / output connector; And
A memory unit connected to the microcomputer and storing a parameter to be used in the LCD barrier screen driver module;
The diagonal LCD barrier screen driver is a multi-view switchable stereoscopic image , which is programmed in an event manner and is a communication port for multi-view switching control configured to enable computer-based control and monitoring when connected to an external computer. Display device.
delete delete The multi-view switchable stereoscopic image display apparatus of claim 1, wherein a subpixel value of a final output image and a subpixel value of an mth view image are stored in the interlacing variable storage unit. :
[Equation 1]
H (x, y, c) = _Gm (x, y, c)
m = 1 + (3x + cy% n)% n
H (x, y, c): Subpixel value of the final output image
G _m (x, y, c): the subpixel value of the m-th viewpoint image
(x, y): pixel position of the final output image
c: Subscript of color
n: total number of repeat points
m: Subscript of the multi-view image.
The barrier device of claim 1, wherein the display device comprises a plurality of left eye pixels and a plurality of right eye pixels, and the diagonal LCD barrier screen is implemented in a parallax barrier manner, and is arranged to correspond to the left eye pixels and the right eye pixels. Multi-view switchable stereoscopic image display device comprising a.
delete The multi-view switchable stereoscopic image display device according to claim 1, wherein the diagonal LCD barrier screen is arranged such that the barrier is inclined at 70 to 80 degrees with respect to the row direction of the barrier screen.

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