KR20080101165A - Multi display device - Google Patents

Abstract

There is provided a multi-display apparatus that can reduce the visibility of the boundary area and improve the quality of an image displayed on the entire screen. The multi display apparatus analyzes a plurality of display panels connected to each other to display an entire image, a transmission frame formed along a boundary portion positioned between the plurality of display panels, a plurality of light sources disposed below the transmission frame, and an entire image. And a driving unit for controlling the plurality of light sources according to the analysis result.

Description

Multi display device

1 is a block diagram of a multi-display apparatus according to a first embodiment of the present invention.

2 and 3 are diagrams illustrating an example in which the light source of FIG. 1 is modified.

4A to 4D are reference diagrams for describing the effects of FIGS. 1 to 3.

5 is a configuration diagram of a multi display apparatus according to a second exemplary embodiment of the present invention.

6 is a configuration diagram of a multi display apparatus according to a third exemplary embodiment of the present invention.

7 is a configuration diagram illustrating an example in which the light source of FIG. 6 is modified.

FIG. 8 is a reference diagram for explaining the effects of FIGS. 6 and 7.

9 is a detailed configuration diagram of the driving unit applicable to the present invention.

(Explanation of symbols for the main parts of the drawing)

110: display panel 120, 220: transmission frame (Light Frame)

130: light source 140: driver

The present invention relates to a display device, and more particularly to a multi-display device consisting of a plurality of display panels.

In general, a multi-display apparatus is configured by connecting a plurality of flat display panels to each other in order to efficiently use a narrow space and to implement a large screen.

As a flat panel display panel, a liquid crystal panel (LCD), a field emission display (FED), a plasma panel (PDP), an electroluminescent display (EL), and the like are used.

Such a multi display apparatus has an image display area consisting of a plurality of display panels and a border area connecting the plurality of display panels with each other.

However, the boundary region of the multi display apparatus is configured to maintain a predetermined shape and color (for example, black or gray) regardless of the image displayed on the image display region.

Therefore, the conventional multi-display apparatus has a limitation in reducing the area occupied by the boundary region, and it is impossible to control the color or luminance of the boundary region, so that the boundary region is easily identified by the human eye, and the boundary region is used to display the entire screen. There is a problem that the display quality is degraded.

Accordingly, an object of the present invention is to provide a multi-display apparatus in which the luminance or color of the boundary region can be controlled similarly to the image display region.

Another object of the present invention is to provide a multi-display apparatus capable of improving the display quality of the entire screen by reducing the visibility of the boundary area.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

According to an aspect of the present invention, there is provided a multi-display apparatus including: a plurality of display panels connected to each other to display an entire image, and a transmissive frame formed along a boundary portion positioned between the plurality of display panels. And a driver configured to analyze the plurality of light sources disposed under the transmission frame and the entire image, and to control the plurality of light sources according to an analysis result.

In accordance with another aspect of the present invention, a multi-display apparatus includes a plurality of display panels connected to each other to display an entire image, a transmissive frame formed along a boundary portion positioned between the plurality of display panels, and disposed on a side of the transmissive frame. And a driver configured to analyze the plurality of light sources and the entire image, and to control the plurality of light sources according to an analysis result.

Specific details of other embodiments are included in the detailed description and the drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. Like reference numerals refer to like elements throughout.

Hereinafter, a multi display apparatus according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a multi-display apparatus according to a first embodiment of the present invention.

Referring to FIG. 1, the multi display apparatus according to the first exemplary embodiment of the present invention includes a plurality of display panels 110, a transmission frame 120, a plurality of light sources 130, a display panel 110, and a light source 130. It includes a driving unit 140 for controlling.

The multi display device has 4 × 4, 5 × 5,... For example, the plurality of display panels 110 may be tiled to form a multi screen. Here, as a plurality of display panels 110 are used in combination, a divided boundary between the display panels 110 appears.

The plurality of display panels 110 are connected to each other to display the entire image under the control of the driving unit 140, and are inserted into and fixed to the transmission frame 120. As the display panel 110, various types of flat panel display panels such as a liquid crystal panel, a field emission panel, a plasma panel, and an EL panel may be used.

The transmissive frame 120 connects and fixes the plurality of display panels 110 to each other.

The transmissive frame 120 is formed in a net shape along a boundary between the plurality of display panels 110 and an entire screen including the plurality of display panels 110.

The plurality of light sources 130 supply light to the transmission frame 120 under the control of the driving unit 140.

In FIG. 1, a white light source 131 that emits white light is used as the light source 130, and a plurality of white light sources 131 are arranged at regular intervals below the transmission frame 120 according to a direct type. Light is directly supplied to the front of the transmission frame 120.

The driver 140 analyzes the entire images inputted to the plurality of display panels 110 and controls the plurality of light sources 130 according to the analysis result, thereby adjusting the luminance of the transmission frame 120 to be similar to the entire image. Adjust with

As a method used for image analysis, a method of analyzing an entire image and a method of selecting a region near a boundary and analyzing a partial image corresponding thereto may be used. These two types of analysis methods may be applied differently depending on the shape of the light source 130 is installed.

When color control of the light source 130 is difficult and luminance is easily controlled, the driving unit 140 may include a plurality of transmission frames 120 positioned at the boundary and the outside so as to have a brightness similar to that of the image displayed on the plurality of display panels 110. The blinking and brightness of the light source 130 are adjusted.

When a white light source 131 such as a Cold Cathode Fluorescent Lamp (CCFL), an External Electrode Fluorescent Lamp (EEFL), or a White Light Emitting Diode is used, brightness is controlled. It is efficient to carry out.

When the white light source 131 is used, the driver 140 extracts the luminance signal of the entire input image and controls the plurality of light sources 130 according to the extracted luminance signal to adjust the luminance of the boundary and the outside.

As described above, in the case of FIG. 1, since the white light source 131, which is difficult to adjust color, is used as the light source 130, the driving unit 140 controls only the brightness of the white light source 131 so that the luminance of the boundary and the outer part of the entire image is adjusted. The luminance and the luminance of the boundary and the outside are set to similar tones.

However, the present invention is not limited thereto, and when the light source 130 capable of adjusting both brightness and color is used, the driving unit 140 adjusts the brightness or color to the same tone as the entire image.

That is, the driver 140 controls the light source 130 such that the luminance or color of the transmission frame 120 positioned at the boundary between the plurality of display panels 110 and the outside of the entire screen is synchronized with the luminance or color of the entire image. To improve the display quality of the entire image.

Although not shown, the multi display apparatus may include a bottom cover for fixing the plurality of light sources 130 to the lower portion of the transmission frame 120, and formed on an inner side surface of the bottom cover to exit from the plurality of light sources 130. It may further include a reflecting plate for reflecting light to the front, an optical sheet positioned on the plurality of light sources 130 to increase the use efficiency of the light.

2 and 3 are diagrams illustrating an example in which the light source of FIG. 1 is modified.

Referring to FIG. 2, a color light source 132 such as a red light emitting diode (R), a green light emitting diode (G: green LED), a blue light emitting diode (B: blue LED), and the like is used as the light source 130. . The plurality of color light sources 132 are disposed below the transmission frame 120 in a direct manner.

When the color light source 132 is installed, color may be expressed on the transmission frame 120 by controlling the light source 130 according to the color signal of the entire image.

The driver 140 analyzes the color signals of the entire image and controls the plurality of light sources 130 according to the analyzed color signals to adjust the color of the boundary and the outer part.

Referring to FIG. 3, a white light source 131 that emits white light and a color light source 132 that emits red, green, and blue light are used together as the light source 130, and a plurality of light sources 130 are directly operated. It is arranged in the lower portion of the transmission frame 120.

The white light source 131 includes a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a white light emitting diode (White LED), and the like that emit white light. The color light source 132 includes a red light emitting diode (Red LED), a green light emitting diode (Green LED), a blue light emitting diode (Blue LED), and the like.

The driver 140 analyzes the luminance signal and the color signal of the entire image and controls the plurality of light sources 130 according to the analyzed luminance signal and the color signal. That is, the driving unit 140 controls the luminance or color of the plurality of light sources 130 installed at the boundary and the outside in accordance with the entire input image so that the corresponding portion has a tone similar to the entire image.

In this case, when the plurality of light sources 130 are arranged to be separated by regions and then dividedly driven, the luminance signals and the color signals of the boundary and the outside may be separately controlled for each region.

For example, when a plurality of light sources 130 are disposed on the outside of each display panel 110 to be separated from each other and controlled by each area, the outside of the outside may be matched to the luminance or color of the divided image displayed on each display panel 110. You can adjust the tone.

4A to 4D are reference diagrams for describing the effects of FIGS. 1 to 3.

FIG. 4A illustrates a case in which a boundary and an outline maintain a predetermined frame having a constant color and luminance regardless of a plurality of (eg, four) divided images displayed through the plurality of display panels 110. It is shown.

In the case of (a), since the boundary and the outside are completely different from the entire image and are easily seen by the human eye, the display quality of the entire image is deteriorated.

When the transmission frame 120 and the plurality of light sources 130 are installed at the boundary and the outside of the multi display apparatus, and the plurality of light sources 130 are controlled according to the entire image, as shown in (b), the boundary and the outside It will have a tone similar to the whole image.

4B to 4D are green (0, 255, 0) when the image data (red, green, blue) of the entire input image is gray (127, 127, 127) and white (255, 255, 255). ) Is illustrated.

(a) is a screen to which the transmission frame 120 is not applied, (b) is a screen to which the transmission frame 120 is applied.

Referring to FIG. 4B, the transmission frame 120 is installed, and the luminance of the light source 130 positioned below the transmission frame 120 is analyzed by analyzing the entire input image so that the boundary and the outside have a tone similar to the entire image. The color is adjusted.

Referring to FIG. 4C, the transmission frame 120 is installed, and the light source 130 is controlled to have a brightness similar to that of the entire image in which the boundary and the outside are input. As shown in FIG. 4C, when the driver 140 controls only the luminance of the transmission frame 120, a white light source 131 that emits white light may be used as the light source 130.

When the transmission frame 120 is installed, and the color light source 132 that emits color light is used as the light source 130, as shown in FIG. 4D, color representation of the boundary and the outer part is also possible.

5 is a configuration diagram of a multi display apparatus according to a second exemplary embodiment of the present invention.

Referring to FIG. 5, the multi display apparatus according to the second exemplary embodiment of the present invention includes a plurality of display panels 110, a transmission frame 120, a plurality of light sources 130, a lamp housing 133, and a driver 140. It includes.

The plurality of display panels 110 are connected to each other to display the entire image.

The transmissive frame 120 is formed along a boundary and an outer boundary between the plurality of display panels 110.

The transmission frame 120 is disposed on the side of the light source 130 in an edge type to perform a function similar to that of the light guide plate. That is, the transmission frame 120 guides the light incident to the light emitted from the light source 130 and converts the light into the plane light, and then emits the converted light to the front surface.

The plurality of light sources 130 may be disposed on the left and right sides of the transmission frame 120 or on the top, bottom, left, and right sides of the transmission frame 120 to emit light.

The light emitted from the light source 130 is incident directly into the interior of the transmission frame 120, or is reflected by the lamp housing 133 surrounding a portion of the light source 130 and then incident into the interior of the transmission frame 120.

The lamp housing 133 is formed to surround one side of the plurality of light sources 130 to reflect the light emitted from the side back toward the transmission frame 120 to increase light utilization efficiency.

The driver 140 analyzes the entire input image and controls the plurality of light sources 130 according to the analysis result.

As the light source 130, a white light source 131 such as a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a white light emitting diode (White LED), a red light emitting diode (Red LED), and a green light emitting diode (Green) Color light sources 132 such as LEDs, blue LEDs, and the like may be used.

When the white light source 131 capable of only luminance control is used, the driver 140 analyzes the luminance signal of the entire image and controls the plurality of white light sources 131 according to the analyzed luminance signal.

When a color light source 132 capable of both luminance and color control is used, the driver 140 analyzes the color signal together with the luminance signal of the entire image, and the plurality of light sources 130 according to the analyzed luminance signal and the color signal. To control.

Here, the luminance or color representation may vary depending on how the light source 130 is installed.

When the light source 130 is configured as one type, that is, a white light source 131 capable of controlling only brightness, the visibility of the boundary and the outside may be reduced by adjusting the brightness of the transmission frame 120 according to the entire input image. .

When a color light source 132 including red, green, and blue light emitting diodes is used as the light source 130, and the light source 130 is installed on the side of the transmission frame 120, a combination of three kinds of light emitting diodes may be used. It is possible to implement different colors.

That is, by adjusting the color and brightness of the light source 130 in accordance with the entire incoming image, it is possible to improve the quality of the image by removing the awkwardness of the boundary and the outside as a whole.

Instead of being installed at the side of the transmission frame 120 according to the edge method, the plurality of light sources 130 may be installed at the lower part of the transmission frame 120 according to the direct method to send light directly to the transmission frame 120. have.

When the color light sources 132 are installed in a direct manner, more detailed color expression is possible for each position, and colors of the boundary and the outer portion may be expressed similarly to the entire image.

In addition, the driving unit 140 may separately drive the plurality of light sources 130 to separately control the luminance signal or the color signal of the boundary and the outer area for each region.

Although not shown, a bottom cover disposed on the rear surface of the transmission frame 120 to mount the plurality of light sources 130 and positioned inside the bottom cover may direct light generated from the light source 130 toward the transmission frame 120. A reflective plate for reflecting to improve light efficiency and a plurality of optical sheets disposed on the front surface of the transmissive frame 120 to diffuse and collect light emitted from the transmissive frame 120 may be further formed.

6 is a configuration diagram of a multi display apparatus according to a third exemplary embodiment of the present invention.

Referring to FIG. 6, the multi display apparatus according to the third exemplary embodiment includes a plurality of display panels 110, a transmission frame 220, a plurality of light sources 130, and a driver 140.

The transmissive frame 220 is formed in a cross shape along a boundary portion positioned between the plurality of display panels 110.

A color light source 132 including red, green, and blue light emitting diodes is used, and the color light source 132 is installed on the side of the transmission frame 220, that is, an area where light is incident, and the transmission frame 220. Serves as the light guide plate. The light guide plate converts light incident from the side into planar light and emits light to the front surface.

If necessary, a pattern positioned on a lower surface of the transmission frame 220 or an optical sheet and a reflecting plate respectively positioned on and below the transmission frame 220 may be further configured to scatter and collect light. .

The driver 140 adjusts the luminance of each of the red, green, and blue light emitting diodes according to the entire input image, and expresses the color of the boundary by adjusting the brightness of each light emitting diode.

The periphery of the transmission frame 220, not shown, maintains a frame in which color and shape are fixed. In addition, the boundary of the plurality of display panels 110 includes a transparent / translucent transparent frame 220 through which light can be transmitted so as to adjust brightness and color of the boundary of the entire image.

7 is a configuration diagram illustrating an example in which the light source of FIG. 6 is modified.

The color light sources 132 including the red, green, and blue light emitting diodes used may be disposed in a direct manner as shown in FIG. 7.

When the plurality of color light sources 132 are disposed in a direct manner, luminance and color may be expressed for each region, thereby enabling a more detailed image representation.

In the direct method, a white light source 131 including a white light emitting diode or a lamp may be used instead of the color light source 132 including the red, green, and blue light emitting diodes together with the cross-shaped transmission frame 220. In this case, the color representation of the border is difficult and only luminance representation is possible.

FIG. 8 is a reference diagram for explaining the effects of FIGS. 6 and 7.

(a) shows a screen when the transmission frame 220 is not applied, (b) shows a screen when the transmission frame 220 is applied.

Referring to FIG. 8, since the transmission frame 220 is applied only to an inner boundary that represents an image, the outermost portion is not changed, and the luminance and color of the boundary are adjusted to be synchronized with the entire image.

9 is a detailed configuration diagram of the driving unit applicable to the present invention.

Referring to FIG. 9, the driver 140 includes an image analyzer 141, an image divider 142, a power controller 143, and a power generator 144.

The image analyzer 141 analyzes the entire input image to generate a main image and a sub image.

The image divider 142 divides the entire image into a plurality of divided images (images 1, 2, ..., image n) by using the main image, and divides the plurality of divided images (images 1, 2, ..., image). n) is provided to the plurality of display panels 110, respectively. In FIG. 9, it is assumed that a liquid crystal panel is used as the display panel 110.

The power control unit 143 generates a light source control signal corresponding to the sub image.

The power supply unit 144 controls the plurality of light sources 130 according to the light source control signal. The light source control signal is for setting a color signal or a luminance signal of a sub image, that is, a portion corresponding to the boundary and the outer portion of the entire image. By the light source control signal, the luminance and the color of the boundary and the outside where the transmission frames 110 and 220 corresponding to the plurality of light sources 130a, 130b,..., And 130k are placed are controlled to a tone similar to the entire image.

The liquid crystal panel used as the display panel 110 includes upper and lower substrates facing each other, and a liquid crystal layer having anisotropic dielectric constant positioned between the two substrates. The liquid crystal panel changes the molecular arrangement of the liquid crystal material by adjusting the intensity of the electric field formed in the liquid crystal layer, thereby selectively transmitting / blocking the light emitted from the light source 130 to display a desired image.

Therefore, when the liquid crystal panel is used as the display panel 110, a plurality of backlight units 111 for supplying light to the display panel 110 to display an image are required.

The number of backlight units 111a, 111b,..., 111n is equal to the number of display panels 110.

As described above, the display quality of the entire image may be improved through the multi display apparatus in which the entire region including the boundary and the outer region has similar luminance or color.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

According to the present invention made as described above, the boundary region can be controlled to have a luminance or color similar to that of the image display region.

In addition, the present invention can improve the quality of the image displayed on the entire screen by reducing the visibility of the border area.

Claims (16)

A plurality of display panels connected to each other to display an entire image; A transmissive frame formed along a boundary portion positioned between the plurality of display panels; A plurality of light sources disposed under the transmission frame; And A driver configured to analyze the entire image and control the plurality of light sources according to an analysis result Multi display device comprising a. The method of claim 1, Each of the plurality of light sources, And a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and a white light emitting diode (White LED). The method of claim 1, The driving unit, And extracting the luminance signal of the entire image and controlling the plurality of light sources according to the extracted luminance signal to adjust the luminance of the boundary part. The method of claim 1, Each of the plurality of light sources, At least one of a red light emitting diode (Red LED), a green light emitting diode (Green LED), a blue light emitting diode (Blue LED). The method of claim 1, The driving unit, And analyzing the color signals of the entire image and controlling the plurality of light sources according to the analyzed color signals to adjust the color of the boundary part. The method of claim 1, The plurality of light sources, At least one of a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL) and a white LED, and a red light emitting diode (Red LED), a green light emitting diode (Green LED), and a blue light emitting diode (Blue) Multi display device including at least one of LED). The method of claim 1, The driving unit, And analyzing the luminance signal and the color signal of the entire image, and controlling the plurality of light sources according to the analyzed luminance signal and the color signal. The method of claim 1, The driving unit, And dividing and driving the plurality of light sources to separately control the luminance signal or the color signal of the boundary unit for each region. The method of claim 1, The driving unit, An image analyzer configured to analyze the entire input image to generate a main image and a sub image; An image divider configured to divide the entire image into a plurality of divided images by using the main image, and provide the plurality of divided images to the plurality of display panels, respectively; A power controller configured to generate a light source control signal corresponding to the sub image; And A power supply unit controlling the plurality of light sources according to the light source control signal Multi display device comprising a. The method of claim 1, The transmission frame, Multi-display apparatus characterized in that formed in a mesh shape along the boundary between the plurality of display panels and the entire screen consisting of the plurality of display panels. The method of claim 1, The transmission frame, And a cross shape along a boundary portion positioned between the plurality of display panels. A plurality of display panels connected to each other to display an entire image; A transmissive frame formed along a boundary portion positioned between the plurality of display panels; A plurality of light sources disposed on side surfaces of the transmission frame; And A driver configured to analyze the entire image and control the plurality of light sources according to an analysis result Multi display device comprising a. The method of claim 12, The plurality of light sources, A multi-display device comprising at least one of a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and a white light emitting diode (White LED). The method of claim 12, The plurality of light sources, A multi display device comprising at least one of a red light emitting diode (Red LED), a green light emitting diode (Green LED), and a blue light emitting diode (Blue LED). The method of claim 12, The driving unit, And analyzing the luminance signal or the color signal of the entire image and controlling the plurality of light sources according to the analyzed luminance signal or the color signal. The method of claim 12, And a lamp housing formed to surround one side of the plurality of light sources.

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