KR20060020351A - Back-light assembly and display having the same - Google Patents

Abstract

Disclosed are a backlight assembly and a display device having the same to sense a desired position by sensing a signal provided from a user. The backlight assembly includes a lamp assembly, a light guide plate, a container, and a sensing module. The lamp assembly includes a lamp that generates light. The light guide plate receives light generated from the lamp assembly. The storage container includes a lamp assembly and a bottom surface for supporting the light guide plate. The sensing module detects a sensing signal externally interposed between the bottom surface and the light guide plate. As such, since the sensing module is accommodated in the storage container, a separate means for fixing the sensing module is omitted, the assembly of the position detecting display device can be made simpler.

Description

BACK-LIGHT ASSEMBLY AND DISPLAY HAVING THE SAME}

1 is an exploded perspective view illustrating a backlight assembly according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line I1-I2 of FIG. 1.

3 is a cross-sectional view illustrating a backlight assembly according to a second embodiment of the present invention.

4 is a cross-sectional view illustrating a backlight assembly according to a third embodiment of the present invention.

5 is an exploded perspective view illustrating a display device according to a fourth exemplary embodiment of the present invention.

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

    100 lamp assembly 200 light guide plate

    300: storage container 400: sensing module

    410: input device 420, 430: processing unit

    500: reflector 600: optical sheet

    700: backlight assembly 800: display panel

    900: top chassis

The present invention relates to a backlight assembly and a display device having the same. More particularly, the present invention relates to a backlight assembly capable of sensing a position selected by a user and a display device having the same.

In general, the design of complex and precise machines or buildings and the design of clothes that require a delicate sense are mostly done through a computer, and the location information of the design and the clothes drawings is computerized using a mouse, which is a representative input device. Is entered into the storage device.

However, the input method through the mouse has a problem that it is difficult to accurately and quickly input the sensing signal to the storage device of the computer. Recently, the sensing signal can be easily input by touching an electronic pen or a finger on the display panel. Location-aware modules have been developed.

Such a location recognition module is widely applied to flat panel displays, particularly liquid crystals, among image display devices.

However, the position recognition module is mostly disposed at the rear of the liquid crystal display, and the position recognition module is fixed to the liquid crystal display by a tape or a screw.

As a result, the number of steps and assembly time for assembling the liquid crystal display and the position recognition module are greatly increased, and since the position recognition module is disposed outside the liquid crystal display, it is easily damaged by an externally applied impact.

Accordingly, the present invention has been made in view of such a conventional problem, and a first object of the present invention is to provide a backlight assembly which prevents an increase in the number of assembly steps and assembly time by the position recognition module.

A second object of the present invention is to provide a display device having the backlight assembly.

The backlight assembly for achieving the first object of the present invention includes a lamp assembly, a light guide plate, a storage container and a sensing module. The lamp assembly includes a lamp that generates light. The light guide plate receives light generated from the lamp assembly. The storage container includes a lamp assembly and a bottom surface for supporting the light guide plate. The sensing module detects a sensing signal externally interposed between the bottom surface and the light guide plate.

In addition, the display device for achieving the second object of the present invention includes a backlight assembly and a display panel. The backlight assembly includes a lamp assembly, a light guide plate, a container, and a sensing module. The lamp assembly includes a lamp that generates light. The light guide plate receives light generated from the lamp assembly. The storage container includes a lamp assembly and a bottom surface for supporting the light guide plate. The sensing module detects a sensing signal externally interposed between the bottom surface and the light guide plate. The display panel is disposed above the backlight assembly to change light into image light including information.                     

According to the present invention, since the sensing module is accommodated in the storage container, a separate assembly process for fixing the position of the sensing module can be omitted, and as a result, the assembly time of the position sensing display device can be shortened.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Backlight assembly

Example 1

1 is an exploded perspective view illustrating a backlight assembly according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line I1-I2 of FIG. 1.

1 and 2, the backlight assembly 700 according to the present exemplary embodiment includes a lamp assembly 100, a light guide plate 200, a storage container 300, and a sensing module 400.

The lamp assembly 100 includes a lamp 110 and a lamp cover 120. The lamp 110 according to the present embodiment is, for example, a cold cathode fluorescent lamp (CCFL).

The lamp cover 120 allows the light generated radially from the lamp 110 to be focused and emitted. To realize this, the lamp cover 120 may be made of a metal having excellent reflectance, for example, brass. Alternatively, the lamp cover 120 may further include a light reflection layer (not shown) having a high reflectance on the inner surface.

The light guide plate 200 according to the present exemplary embodiment includes side surfaces 240 including a light incident surface 210, a light reflecting surface 220, and a light emitting surface 230.

The light incident surface 210 is disposed to face the lamp 110 of the lamp assembly 100, and the light generated from the lamp 110 is incident on the light incident surface 210.

The light reflecting surface 220 is connected to the light incident surface 210 and reflects light incident through the light incident surface 210. The reflection dot 222 is disposed on the light reflection surface 220 to reflect light incident on the light guide plate 200. The reflective dot 222 according to the present exemplary embodiment may be arranged on the light reflective surface 220 in plural, for example, in a matrix form.

The light exit surface 230 is connected to the light incident surface to face the light reflecting surface 220, and the light incident through the incident surface 210 is emitted to the light exit surface 230. In the present embodiment, preferably, the light emitting surface 230 and the light reflecting surface 220 may be arranged in parallel with each other, or alternatively, the light emitting surface 230 and the light reflecting surface 230 may be arranged not in parallel with each other. have.

The storage container 300 includes a bottom surface 310 and sidewalls 320 extending or disposed from an edge of the bottom surface 310. A storage space is formed in the storage container 300 by the bottom surface 310 and the sidewalls 320, and the lamp assembly 100, the light guide plate 200, and the sensing module 400 are accommodated in the storage space. In the bottom surface 310 of the storage container 300 according to the present embodiment, for example, an opening 312 for dissipating heat generated by the lamp assembly 100 may be formed.

The sensing module 400 is disposed between the light guide plate 200 and the bottom surface 310 of the storage container 300. The sensing module 400 detects a sensing signal input toward the light reflection surface 220 from the light exit surface 230 of the light guide plate 200, for example. The sensing signal according to the present embodiment is an electric signal or a magnetic signal.

The sensing module 400 according to the present embodiment may further include a processing unit 420 for processing the sensing signal.

The processing unit 420 is electrically connected to the sensing module 400 by a cable 422 to receive the sensing signal sensed by the sensing module 400. The processing unit 420 includes a sensing signal processing circuit therein, and the sensing signal processing circuit converts the input sensing signal into digital values of, for example, X and Y coordinates. The converted coordinate values are transmitted to an external central processing unit (not shown) and a storage device (not shown) to execute a program corresponding to the coordinate values or send an image signal to a display panel (not shown) to display an image. The processing unit 420 according to the present embodiment may be disposed on the outer surface of the bottom surface 310 by passing the cable 422 through the opening 312 of the bottom surface 310.

As such, since the sensing module 400 is disposed between the bottom surface 310 of the storage container 300 and the light guide plate 200, a separate coupling process for fixing the sensing module 400 is unnecessary, and a coupling process is performed. The alignment process, which must be performed before, can also be omitted. As a result, the assembly time required for the position sensing backlight assembly 700 can be further shortened.

Example 2

3 is a cross-sectional view illustrating a backlight assembly according to a second embodiment of the present invention. Except for the sensing module, the backlight assembly according to the second embodiment of the present invention has the same configuration as the backlight assembly of the first embodiment described above, and thus the duplicated description thereof will be omitted. The code and name will be used.

Referring to FIG. 3, the backlight assembly 700 according to the present embodiment includes a lamp assembly 100, a light guide plate 200, a storage container 300, and a sensing module 400.

The sensing module 400 is disposed between the light guide plate 200 and the bottom surface 310 of the storage container 300. The sensing module 400 according to the present embodiment may be disposed between the light guide plate 200 and the lamp cover 120.

The sensing module 400 detects a sensing signal input toward the light reflection surface 220 from the light exit surface 230 of the light guide plate 200, for example. The sensing signal according to the present embodiment is an electrical signal or a magnetic signal.

The sensing module 400 may further include a processing unit 430 for processing the sensing signal. In the present embodiment, the processing unit 430 may be disposed on the sensing module to form one module. The processing unit 430 receives the sensing signal of the sensing module 400 and converts the sensing signal into a digital value.

As such, the sensing module 400 may be disposed inside the storage container 300 to omit a separate coupling process for fixing the sensing module 400, and as a result, the position sensing backlight assembly 700 may be required. It is possible to shorten the assembly time that is.

Example 3

4 is a cross-sectional view illustrating a backlight assembly according to a third embodiment of the present invention. The light guide plate and the accommodating container according to the third embodiment of the present invention have the same configuration as the light guide plate and the accommodating container of the first embodiment as described above, and thus duplicated descriptions thereof will be omitted. Let's use.

Referring to FIG. 4, the backlight assembly 700 according to the present embodiment includes a lamp assembly 100, a light guide plate 200, a storage container 300, and a sensing module 400.

The lamp assembly 100 includes a lamp 110 and a lamp cover 130. The lamp 110 according to the present embodiment is, for example, a cold cathode fluorescent lamp (CCFL).

The lamp cover 130 allows the light generated radially from the lamp 110 to be focused and emitted. To realize this, the lamp cover 130 may be made of a metal having excellent reflectance, for example, brass. Alternatively, the lamp cover 130 may further include a light reflection layer (not shown) having a high reflectance of light on the inner surface. In the lamp cover 130 according to the present exemplary embodiment, the width of the upper surface of the lamp cover 130 and the width of the lower surface of the lamp cover 130 are different from each other. For example, the width of the lower surface of the lamp cover 130 is longer than the width of the upper surface of the lamp cover 130.

The sensing module 400 is disposed between the light guide plate 200 and the bottom surface 310 of the storage container 300. The sensing module 400 according to the present embodiment may be disposed between the light guide plate 200 and the lamp cover 120.

The sensing module 400 detects a sensing signal input toward the light reflection surface 220 from the light exit surface 230 of the light guide plate 200, for example. The sensing signal according to the present embodiment is an electrical signal or a magnetic signal. The sensing module 400 according to the present embodiment may further include a processing unit 420 for processing the sensing signal.

As such, since the sensing module 400 is disposed inside the storage container 300, a separate coupling process for fixing the sensing module 400 is unnecessary, so that the assembly time required for the position sensing backlight assembly 700 is eliminated. Can be shortened.

The backlight assembly 700 according to the present exemplary embodiment may further include a reflecting plate 500 and optical sheets 600.

The reflecting plate 500 is disposed between the light reflecting surface 220 and the sensing module 400 of the light guide plate 200 to reflect the leaked light that is not reflected by the light reflecting surface 220. The reflective plate 500 may be formed of, for example, a double layer of a reflective sheet and a metal sheet.

The optical sheets 600 are accommodated in the storage container 300 and disposed on the light guide plate 200. The optical sheet 600 improves the optical characteristics of the light emitted from the light exit surface 230 of the light guide plate 200.

The optical sheets 600 may include, for example, a diffusion sheet 610 and at least one prism sheet 620.

The diffusion sheet 610 is disposed on the light exit surface 230 of the light guide plate 200, and evenly diffuses the light emitted from the light exit surface 230 and enters the prism sheet 620. The prism sheet 620 is disposed on an upper surface of the diffusion sheet 610, and condenses the light emitted from the diffusion sheet 610 by using reflection and refraction to improve the vertical luminance of the light.

Display

Example 4

5 is an exploded perspective view illustrating a display device according to a fourth exemplary embodiment of the present invention. Except for the sensing module, the input device, and the processing unit, the backlight assembly according to the fourth embodiment of the present invention has the same configuration and function as the backlight assembly of the first embodiment described above, and thus a redundant description thereof will be omitted. The same reference numerals and names are used for the same components.

Referring to FIG. 4, the display device 1000 according to the present exemplary embodiment includes a backlight assembly 700 generating light and a display panel 800 displaying an image using light.

The backlight assembly 700 according to the present exemplary embodiment includes a lamp assembly 100, a light guide plate 200, a storage container 300, a sensing module 400, a reflective plate 500, and an optical sheet 600.

The sensing module 400 has a plate shape and is disposed between the light guide plate 200 and the bottom surface 310 of the storage container 300. The sensing module 400 detects a sensing signal on the display panel 800 to be described later. The sensing signal according to the present embodiment is an electrical signal or a magnetic signal.

The backlight assembly 700 according to the present embodiment further includes an input device 410 for inputting a sensing signal to the sensing module 400 and a processing unit 420 for receiving and processing the sensing signal from the sensing module 400. can do. Although the processing unit 420 according to the present embodiment is electrically connected to the sensing module 400 by a cable 422, the processing unit 420 may be arranged on the sensing module 400.

The input device 410 is disposed above the backlight assembly 700, for example, on the display panel 800, and is in contact with the display panel 800. The input device 410 according to the present embodiment may be, for example, an electronic pen capable of inputting an accurate sensing signal by reducing the contact area.

As the input device 410 in contact with the display panel 800 is electrically or magnetically reacted with the sensing module 400, the sensing module 400 may sense a position where the input device 410 is in contact.

The processing unit 420 is electrically connected to the sensing module 400 by a cable 422 to receive the sensing signal sensed by the sensing module 400. The processing unit 420 includes a sensing signal processing circuit therein, and the sensing signal processing circuit converts the input sensing signal into digital values of, for example, X and Y coordinates. The converted coordinate values are transmitted to an external central processing unit (not shown) and a storage device (not shown) to execute a program corresponding to the coordinate values or send an image signal to the display panel 800 to display an image. In the processing unit 420 according to the present exemplary embodiment, the cable 422 passes through the opening 312 formed in the bottom surface 310 of the storage container 300, so that the outer surface of the bottom surface 310 of the storage container 300 is closed. Can be placed in.

As such, the sensing module 400 is disposed between the bottom surface 310 of the storage container 300 and the light guide plate 200, so that a separate coupling process for fixing the sensing module 400 is unnecessary, thereby reducing assembly time. It can shorten.

The display panel 800 includes a first substrate 810, a second substrate 820, a liquid crystal layer 830, a printed circuit board 840, and a flexible circuit board 850.

The first substrate 810 includes a plurality of pixel electrodes, a thin film transistor (TFT) applying a driving voltage to the pixel electrode, and signal lines for operating the thin film transistor.

The pixel electrode may include transparent and conductive indium tin oxide (ITO), indium zinc oxide (IZO), and amorphous indium tin oxide (a-ITO).

The second substrate 820 is disposed to face the first substrate 810. The second substrate 820 is disposed on the front surface of the second substrate 820 and is disposed on the transparent and conductive color electrodes facing the pixel electrode, for example, a red color filter, a green color filter, and a blue color. Include a filter.

The liquid crystal layer 830 is interposed between the first substrate 810 and the second substrate 820 and is rearranged by an electric field formed between the pixel electrode and the common electrode. The rearranged liquid crystal layer 830 adjusts the light transmittance of the light generated by the backlight assembly 700, and the light whose light transmittance is adjusted passes through the color filter to display an image.

The printed circuit board 840 includes a driving circuit therein, and the driving circuit generates a driving signal for controlling the thin film transistor TFT.

The flexible circuit board 850 electrically connects the printed circuit board 840 and the first substrate 810 to provide a driving signal generated from the printed circuit board 840 to the first substrate 810.

The display device 1000 according to the present exemplary embodiment may further include a top chassis 900.                     

The top chassis 900 surrounds the edge of the display panel 800 and is coupled to the sidewall 320 of the storage container 300 to fix the display panel 800 to the upper portion of the backlight assembly 700.

The top chassis 900 prevents damage or damage to the weak brittle display panel 800 due to external shock and vibration, and prevents the display panel 800 from being separated from the storage container 300.

According to the present invention, since the sensing module is disposed between the bottom surface of the storage container and the light guide plate, a separate coupling process for fixing the sensing module is not necessary, and an alignment process to be performed before the coupling process is also omitted. Can be. As a result, the assembly time required for the position sensing backlight assembly can be further shortened.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (15)

A lamp assembly comprising a lamp for generating light; A light guide plate on which light generated by the lamp assembly is incident; A storage container including a bottom surface for supporting the lamp assembly and the light guide plate; And And a sensing module interposed between the bottom surface and the light guide plate to sense a sensing signal applied from the outside. The backlight assembly of claim 1, wherein the sensing signal is an electromagnetic signal. The backlight assembly of claim 1, wherein the sensing module further comprises a processing unit configured to process the sensing signal to determine a location selected by a user. The backlight assembly of claim 3, wherein the processing unit is located on the sensing module. The backlight assembly of claim 1, wherein the storage container further comprises a reflecting plate interposed between the light guide plate and the sensing module. The light guide plate of claim 1, wherein the light guide plate includes a light incidence surface to which the light is incident, a light reflection surface connected to the light incidence surface and parallel to the bottom surface, and a light emission surface parallel to the light reflection surface. Backlight assembly. The backlight assembly of claim 1, wherein the lamp assembly further includes a lamp cover surrounding the lamp, and the sensing module is interposed between the light guide plate and the lamp cover. The backlight assembly of claim 6, wherein widths of the upper surface of the lamp cover and the lower surface of the lamp cover are different from each other. A lamp assembly including a lamp for generating light, a light guide plate on which light generated by the lamp assembly is incident, a storage container including a bottom surface for supporting the lamp assembly and the light guide plate, and between the bottom surface and the light guide plate. A backlight assembly including a sensing module interposed to sense a sensing signal applied from the outside; And And a display panel disposed on the backlight assembly to change the light into image light including information. The display device of claim 9, wherein the sensing signal is an electromagnetic signal. The display apparatus of claim 9, wherein the sensing module further comprises a processing unit configured to process the sensing signal to determine a location selected by a user. The display device of claim 9, wherein the processing unit is on the sensing module. The display device of claim 9, wherein the sensing module further comprises an input device disposed on the display panel to provide the sensing signal to the sensing module. The display device of claim 13, wherein the input device is an electronic pen. The display apparatus of claim 9, wherein the lamp assembly further comprises a lamp cover surrounding the lamp, and the sensing module is interposed between the light guide plate and the lamp cover.

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