KR20080109442A - Display apparatus using goggle - Google Patents

Abstract

A display device using goggle capable of recognizing three dimensional image is provided to be capable of using a pixel clock applied to two dimensional image signal by dividing and processing a right image and a left image of a three dimensional image signal after arranging the right image and the left image of the three dimensional image signal. A display device using goggle capable of recognizing three dimensional image comprises a line buffer(220) and a synchronization signal unit. The line buffer divides a right image and a left image of a three dimensional image signal to a right image and a left image. The synchronization signal unit outputs a synchronization signal making a right goggle crystal and a left goggle crystal of a 3D goggle transparent according to each synchronization signal of the right image signal and the left image signal.

Description

Display Apparatus Using Goggle}

1 is a schematic diagram illustrating a method of displaying a conventional three-dimensional image signal.

2 is a block diagram of a plasma display device according to an embodiment of the present invention.

3 is a block diagram of a first correction unit and a second correction unit of FIG. 2.

4 is a view for explaining the function of the frame memory buffer of FIG.

FIG. 5 is a subfield timing chart of a subfield and a left image of a light image supplied by the subfilb mapping unit of FIG. 2.

FIG. 6 is a diagram illustrating an example in which a sub-filve structure is a dual peak structure.

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

210: frame memory buffer 220: line buffer portion

230: first input buffer 240: first correction

250: second input buffer 260: second correction

270: sub-filb mapping unit

The present invention relates to a display device.

In general, a plasma display apparatus is formed by attaching a plasma display panel for displaying an image and a driving unit for driving the plasma display panel to a rear surface of the plasma display panel.

The plasma display panel includes a barrier rib that forms a plurality of discharge cells between the front substrate and the rear substrate, and the front substrate and the rear substrate, which are spaced apart at regular intervals, and each cell includes neon, helium, or neon. And an inert gas containing a main discharge gas such as a mixed gas of helium (Ne + He) and a small amount of xenon. The discharge cells are a red (R) discharge cell, a green (G) discharge cell, a blue (Blue, B) discharge cells are formed to form a pixel.

In addition, when the plasma display panel is discharged by a high frequency pulse, an inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image.

The plasma display panel includes a plurality of electrodes, for example, a scan electrode (Y), a sustain electrode (Z), and an address electrode (X), each of which has driving parts for supplying a driving voltage to the electrodes of the plasma display panel. Is connected to.

Each driving unit supplies driving pulses, such as reset pulses, scan pulses, and sustain pulses, to the electrodes of the plasma display panel during a predetermined period, for example, during a reset period, an address period, and a sustain period, to emit discharge cells. .

1 is a schematic diagram illustrating a method of displaying a conventional three-dimensional image signal.

As shown in FIG. 1, a method of displaying a 3D video signal continuously displays a right image and a left image and displays a right image and a left image, respectively. Shown in synchronization with the right and left eyes, the human eye recognizes three-dimensional images.

The method of applying such a method of displaying a 3D image signal to a plasma display apparatus has not been established.

An object of the present invention is to provide a display device that can use a pixel clock applied to a two-dimensional image signal as it is.

An object of the present invention is to provide a display device capable of recognizing a 3D image by eye by synchronizing a 3D goggle according to a synchronization signal of a light image and a left image.

The display device for achieving the above object is a line buffer for distributing a right image and a left image of a 3D video signal into a light image and a left image, and a line buffer of the light image and the left image, respectively. The sync signal unit may output a sync signal for transparently writing the light goggles liquid crystal of the three-dimensional goggles and the left goggle liquid crystal according to each sync signal.

The synchronization signal of the synchronization signal unit may be any one of infrared (Infra Red), high frequency (Radio Frequency), Bluetooth (Bluetooth).

The display apparatus may further include a frame memory buffer that stores and aligns a light image and a left image of an input 3D video signal.

The frame memory buffer may include a buffer that aligns the light image and the left image of the input 3D video signal together in a predetermined manner, and a frame memory that stores the image data aligned in the buffer.

The predetermined method includes a first method of aligning the light image and the left image side by side, a second method of aligning the light image and the left image in odd and cloumn columns, respectively, and the light and left images, respectively. It may be any one of the third method of sorting in odd rows and even rows.

A first input buffer for receiving and outputting a light image output from the line buffer, and a first compensation buffer for processing the light image output from the first input buffer as data that can be mapped to a subfield, and outputting from the line buffer A second input buffer for receiving and outputting the left image, a second corrector for processing the left image output from the second input buffer into data that can be mapped to a subfield, and the first corrector and the second report The sub image mapping unit may further include a sub-fib mapping unit configured to map the light image and the left image output from the government according to a pre-stored subfield mapping table, and arrange and supply spatially aligned subfield mapping data into temporal data.

The first compensation part includes at least one of a first reverse gamma compensation part, a first gain control part and a first half toning part, and the second compensation part includes a second reverse gamma compensation part, a second gain control part and a second half. It may include at least one or more of the toning unit.

The sub-filb mapping unit supplies the light image and the left image in order or in reverse order in one field, and the sum of the gray value of the subfield corresponding to the light image and the gray level of the subfield corresponding to the left image. The sum difference of the values may be equal to or less than a predetermined value.

The vertical frequency corresponding to the one field may be 60 Hz or 120 Hz.

When the sub-filb mapping unit supplies the light image and the left image in order or in reverse order in one field, the light goggles liquid crystal and left of the three-dimensional goggles in accordance with a synchronization signal of the light image and the left image. A synchronizing signal for making the goggles liquid crystal transparent can be output.

The synchronization signal output to the 3D goggles may be any one of Infra Red, Radio Frequency, and Bluetooth.

The display device may be a plasma display device.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Hereinafter, with reference to the accompanying drawings a specific embodiment according to the present invention will be described in detail.

2 is a block diagram of a plasma display device according to an embodiment of the present invention.

As shown in FIG. 2, the plasma display apparatus includes a line buffer unit 220, a first input buffer 230, a first correction unit 240, a second input buffer 250, and a second correction unit 260. , And the sub-filb mapping unit 270. The frame memory buffer 210 may be further included before the line buffer unit 220.

The frame memory buffer 210 stores and arranges the light image and the left image of the input 3D video signal together. In detail, the frame memory buffer 210 may include a buffer 211 and a frame memory 212. The buffer 211 aligns the light image and the left image of the input 3D video signal together in a predetermined manner, and the frame memory 212 stores image data arranged in the predetermined manner in the buffer 210.

The predetermined manner in which the buffer 211 aligns is described in detail in FIG.

The line buffer unit 220 distributes the light image and the left image of the 3D video signal into the light image and the left image, respectively. For example, the line buffer unit 220 distributes the light image to the first input buffer 230 and the left image to the second input buffer 250. As a result, when the light image and the left image of the 3D video signal are processed, the pixel clock may be the same as that of the 2D video image, so that there is no additional burden on the plasma display apparatus.

The line buffer unit 220 may specifically include a line buffer 221 and a synchronization signal unit 222. The line buffer 221 distributes the light image among the light image and the left image of the 3D video signal to the first input buffer 230, and distributes the left image to the second input buffer 250, respectively. The synchronizing signal unit 222 transmits a synchronizing signal to make the light goggle liquid crystal of the three-dimensional goggles and the left goggle liquid crystal transparent according to the respective synchronizing signals of the light image and the left image. The synchronization signal unit 222 transmits a synchronization signal by delaying a predetermined time to send a signal to the three-dimensional goggles when the light image and the left image are displayed on the panel. The synchronization signal may use infrared (IR), high frequency (RF), Bluetooth, or the like. Thus, the 3D image may be recognized by the eye.

The first input buffer 230 receives the light image output from the line buffer unit 220 and outputs the light image to the first correction unit 240.

The first correction unit 240 processes the light image output from the first input buffer 230 as data that can be mapped to the subfield.

The second input buffer 250 receives the left image output from the line buffer unit 220 and outputs the left image to the second correction unit 260.

The second correction unit 260 processes the left image output from the second input buffer 250 as data that can be mapped to a subfield.

The sub-filb mapping unit 270 maps the light image output from the first correction unit 240 and the left image output from the second correction unit 260 according to a pre-stored subfield mapping table, and the spatially aligned sub image. Supply field mapping data sorted by temporal data.

3 is a block diagram of the first correction unit 240 and the second correction unit 260 of FIG. 2.

As shown in FIG. 3, the first correction unit 240 may include at least one of the first reverse gamma correction unit 241, the first gain control unit 242, and the first half toning unit 243. have. The second correction unit 260 may include at least one of the second reverse gamma correction unit 261, the second gain control unit 262, and the second half toning unit 263.

The first inverse gamma correction unit 241 inversely gamma corrects the light image input from the outside every frame. The plasma display device is characterized in that the luminance value actually displayed with respect to the gray value of the image signal forms a linear curve. On the other hand, since the luminance value with respect to the grayscale value of the video signal input from the outside has a gamma characteristic, in an exemplary embodiment of the present invention, a first reverse gamma correction unit 241 is provided to reverse gamma correct the external video signal. The screen actually implemented in the plasma display apparatus has a linear luminance value with respect to the gray scale value.

The first gain control unit 242 may be a user or a set maker for the image signals of R (Red), G (Green), and B (Blue) that are reverse gamma corrected by the first reverse gamma correction unit 241. Adjust the gain by red, green and blue by multiplying the gain value that can be adjusted by the set maker. The first gain controller 242 allows the user or set maker to set a desired color temperature. In addition, the first gain control unit 242 may or may not be included in the plasma display device as needed according to an embodiment of the present invention.

The first half toning unit 243 half-tons the image signal input from the first gain control unit 242. The inverse gamma corrected video signal has a reduced gray scale expression in its signal processing. In order to compensate for this, the first half toning unit 243 is provided to improve the reduced gray scale expressive power and to secure the gray scale linearity. Such half-toning methods include dithering and error diffusion methods. The dithering method and the error diffusion method may be used individually or in combination. In the error diffusion method, an error diffusion process may be performed on the image signal input from the first gain controller 242 to finely adjust the luminance value displayed according to the gray value, thereby improving the gray scale expression power. That is, the fractional bits, i.e., error components, of the video signal generated by inverse gamma correction are spread to neighboring pixels.

The second reverse gamma correction unit 261, the second gain control unit 262, and the second half toning unit 263 process the left image except that the first reverse gamma correction unit 241 and the first gain control unit 242 are processed. ) And the same function as the first half toning unit 243 is omitted.

As a modified embodiment, the first half toning unit 243 and the second half toning unit 263 may be integrated into one.

4 is a view for explaining the function of the frame memory buffer 210 of FIG.

As shown in FIG. 4, the buffer 211 of the frame memory buffer 210 aligns the light image and the left image input at a predetermined vertical frequency V_sync output from the 3D image player together in a predetermined manner. The frame memory 212 stores image data arranged in a predetermined manner in the buffer 210.

The predetermined method includes a first method (a) of aligning a light image and a left image side by side, a second method (b) of arranging a light image and a left image in an odd column and an even column, respectively, and a light image. And the left image may be any one of a third method (c) of aligning odd rows and even rows, respectively. 4 illustrates an example in which a right image (1024 × 768) and a left image (1024 × 768) are aligned together in the case of an extended graphics array (XGA).

5 is a subfield timing chart of a subfield of a right image and a left image supplied by the sub-filbmap unit 270 of FIG. 2.

FIG. 6 is a diagram illustrating an example in which a sub-filve structure is a dual peak structure.

As shown in FIG. 5, in the case of a vertical synchronization signal of 60 Hz, the sub-filbmap unit supplies the light image and the left image in order or in reverse order in one field (16.67 ms), and corresponds to the sub image corresponding to the light image. The difference between the sum of the gradation values of the field and the gradation values of the subfields corresponding to the left image is equal to or less than a predetermined value, thereby minimizing the luminance difference between the light image and the left image. As shown in Fig. 6, the gradation value is divided between group 1 (gradation values: 1,4,8,16,32,64) and group 2 (gradation values: 2,4,8,16,32,64). The subfields were divided into two groups to minimize the difference. The vertical frequency corresponding to one field may be 60 Hz or 120 Hz.

When the sub-filbmap unit supplies the light image and the left image in one field in a sequential or reverse order, the light goggles liquid crystal of the three-dimensional goggles are made transparent in accordance with the synchronization signal of the light image, and the synchronization signal of the left image is In addition, the left goggles of the three-dimensional goggles (goggle) can send a synchronization signal to make the liquid crystal transparent. The synchronization signal may be infrared (Infra Red), high frequency (Radio Frequency), Bluetooth (Bluetooth) and the like. Thus, the 3D image may be recognized by the eye.

Although the plasma display device has been described as an embodiment of the present invention, the present invention can be applied to a display device using goggles for implementing a 3D display.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims are as follows. And all changes or modifications derived from the equivalent concept should be construed as being included in the scope of the present invention.

As described above, the present invention aligns the light image and the left image of the 3D video signal together and distributes the light image and the left image of the 3D video signal, respectively, and applies the pixel clock to the 2D video signal. You can use it as it is.

According to the present invention, the 3D image can be recognized by the eye by synchronizing the 3D goggles according to the synchronization signals of the light image and the left image.

Claims (12)

A line buffer for distributing a right image and a left image of the 3D video signal into a right image and a left image, respectively; And A synchronizing signal unit for outputting a synchronizing signal for transparently writing a light goggle liquid crystal of a three-dimensional goggle and a left goggle liquid crystal in accordance with respective synchronization signals of the light image and the left image; Display device comprising a. The method of claim 1, The synchronization signal of the synchronization signal unit is a display device, characterized in that any one of infrared (Infra Red), Radio Frequency (Radio Frequency), Bluetooth (Bluetooth). The method of claim 1, And a frame memory buffer for storing and aligning the light image and the left image of the input 3D video signal. The method of claim 3, wherein The frame memory buffer A buffer for aligning the light image and the left image of the input 3D video signal together in a predetermined manner; And A frame memory for storing the image data arranged in the buffer; Display device comprising a. The method of claim 4, wherein The predetermined method includes a first method of aligning the light image and the left image side by side, a second method of aligning the light image and the left image in odd and cloumn columns, respectively, and the light and left images, respectively. And a third method of arranging odd rows and even rows. The method according to claim 1 or 3, A first input buffer configured to receive and output a light image output from the line buffer; A first correction unit for processing the light image output from the first input buffer into data that can be mapped to a subfield; A second input buffer which receives the left image output from the line buffer and outputs the left image; A second correction unit processing the left image output from the second input buffer as data that can be mapped to a subfield; And A sub-filb that maps the light image and the left image output from the first and second compensators according to a pre-stored subfield mapping table, and arranges and supplies spatially aligned subfield mapping data as temporal data A mapping unit; Display device further comprises. The method of claim 6, The first supplementary government At least one of the first reverse gamma correction unit, the first gain control unit, the first half toning unit, The second supplementary government And at least one of a second reverse gamma correction unit, a second gain control unit, and a second half toning unit. The method of claim 6, The sub-filb mapping unit The light image and the left image are arranged in a field and supplied in reverse order, and the difference between the sum of the gray level values of the subfields corresponding to the light image and the gray level values of the subfields corresponding to the left image is A display device, characterized in that less than a predetermined value. The method of claim 8, And a vertical frequency corresponding to the one field is 60 Hz or 120 Hz. The method of claim 6, The sub-filb mapping unit When feeding the light image and the left image in order or in reverse order in one field, And a synchronization signal for transparently making a light goggle liquid crystal of a three-dimensional goggle and a left goggle liquid crystal in accordance with a synchronization signal of the light image and the left image. The method of claim 10, The synchronization signal output to the 3D goggles is any one of an infrared (Infra Red), a radio frequency (Radio Frequency), Bluetooth (Bluetooth) display device. The method of claim 1, And the display device is a plasma display device.

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