KR20080064482A - Display apparatus - Google Patents

Abstract

A display device is provided to simplify a manufacturing process by coupling a control board with an inverter board and improve the performance of rework due to selectively replacing only a defect board. A display device includes a back light unit, a display panel, a receiving member(320), a control board(400), and an inverter board(500). The back light unit generates light. The display panel displays images. The receiving member receives the back light unit and the display panel. The control board provides a signal for expressing the images to the display panel. The inverter board is attachably and detachably engaged with the control board, and provides power for generating the light to the back light unit.

Description

Display device {DISPLAY APPARATUS}

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

2 is a rear view of the display device according to one embodiment after coupling.

3 is a conceptual diagram illustrating detachment of an inverter board and a control board according to an embodiment.

4 is a conceptual view illustrating detachment of an inverter board and a control board according to a modification of the embodiment.

5 is a rear view of a state where a shield gate is coupled to a display device according to an exemplary embodiment.

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

100: display panel 200: backlight

310, 320: storage member 400: control board

500: inverter board 600: flexible printed circuit board

700: shield case

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device that can improve the rework ability and simplify the configuration by facilitating the coupling and separation between the inverter board and the control board.

Liquid crystal displays (LCDs) have advantages of small size, light weight, and large screen compared to conventional display devices, such as cathode ray tubes (CRTs), and their development is being actively performed. In particular, the liquid crystal display device has been developed to perform a sufficient role as a flat panel display device, and is used not only for display devices of small electronic devices such as camcorders and mobile phones, but also for monitors and large display devices of desktop computers. Is expanding.

The liquid crystal display device includes a liquid crystal display panel in which liquid crystals are aligned, a control PCB (Printed Circuit Board) for supplying an electrical signal to the liquid crystal display panel to control molecular arrangement of the liquid crystal, and irradiating light to the liquid crystal display panel. Backlight and an inverter PCB for supplying power to the backlight.

In the related art, since the control PCB and the inverter PCB are separately manufactured, the manufacturing cost increases, and each of them has to be assembled separately, resulting in a complicated manufacturing process.

Accordingly, the present invention is derived to solve the above problems, it is possible to simplify the manufacturing process of the display device having a control PCB and an inverter PCB by detachable control PCB and inverter PCB, among the control PCB or inverter PCB It is an object of the present invention to provide a display device capable of facilitating replacement thereof when any defect occurs and improving rework capability.

A backlight unit for generating light according to the present invention, a display panel for displaying an image, an accommodating member for accommodating the backlight unit and the display panel, a control board for providing a signal for expressing the image to the display panel; A display device including an inverter board detachably coupled to the control board and providing a power source for generating light to the backlight unit.

A control detachment pattern is provided in one region of the control board so as to detachably couple the control board and the inverter board, and an inverter detachment pattern corresponding to the control detachment pattern is provided in at least one region of the inverter board.

The control and inverter detachment pattern preferably includes a protrusion in which one side surface of the control board and the inverter board protrude and a recessed recess. It is effective that the protruding portion and the concave portion have a rectangular shape or a triangular shape.

The display device may further include a flexible printed circuit board electrically connecting the control board and the display panel.

The control board may further include a signal input and signal output connector, respectively provided in the upper and lower surface areas intersecting the detachable surface detachable from the inverter board.

The inverter board may further include a plurality of lamp connection connectors provided in a surface area opposite to a detachable surface detachable from the control board, and a power input connector provided in a lower area of the detachable surface.

Covering the combined inverter board and the control board, it is preferable to further include a shield case provided in a single body.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

1 is an exploded perspective view of a display device according to an exemplary embodiment, and FIG. 2 is a rear view of the display device after the display device is coupled to the exemplary embodiment. 3 is a conceptual diagram for explaining detachment of an inverter board and a control board according to an embodiment, and FIG. 4 is a conceptual diagram illustrating detachment of an inverter board and a control board according to a modification of the embodiment. 5 is a rear view of a shield case coupled to a display device according to an exemplary embodiment.

1 to 5, the display device according to the present exemplary embodiment includes a display panel 100, a backlight unit 200, storage members 310, 320; 300, a control board 400, and an inverter board 500. ).

The display panel 100 includes an upper substrate 110 and a lower substrate 120 and a liquid crystal provided in an area between the upper substrate 110 and the lower substrate 120, although not shown. Although not shown, a polarizing sheet may be attached to the upper side of the upper substrate 110 and the lower side of the lower substrate 120. Although not shown, the upper substrate 110 is formed of a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO) on a surface facing the lower substrate 120. It includes a common electrode. The upper substrate 110 further includes a color filter in which a predetermined color is expressed while light passes and a black matrix for preventing light leakage. The lower substrate 120 includes a pixel electrode provided to face the common electrode in each pixel area, and a thin film transistor connected to the pixel electrode. The source terminal of the thin film transistor is connected to the data line, and the gate terminal is connected to the gate line.

In the display panel 100, when an electrical signal is input to the data line and the gate line, the thin film transistor is turned on or turned off to apply the gray level signal of the drain terminal to the pixel electrode. This changes the electric field between the pixel electrode and the common electrode to change the arrangement of the liquid crystals. According to the changed arrangement of the liquid crystal, the light transmittance is changed to obtain a desired image.

The backlight unit 200 includes a lamp unit 210 for generating light, a reflector plate 220 disposed under the lamp unit 210, and a plurality of optical sheets 230 disposed over the lamp unit 210. do.

The lamp unit 210 includes a plurality of bar lamps arranged in parallel and a lamp connector connected to both electrode terminals of the lamp. And, although not shown, the lamp fixing part for fixing the lamp and / may further include a lamp support for supporting a portion of the lamp. The lamp connector is connected to the inverter board 500 as shown in FIG. 1, and the lamp emits light according to the power applied through the connector. It is preferable to use a cold cathode fluorescent lamp as the lamp. The lamps in the lamp unit 210 are preferably arranged at equal intervals for luminance uniformity, and the number of lamps is preferably determined according to the required luminance.

The reflector 220 serves to reduce light loss by reflecting light emitted from the lower portion of the lamp unit 210 to the optical sheet 230 using a plate having a high light reflectance. The reflection plate 220 is installed to contact the bottom surface of the lower housing member 320. In FIG. 1, the reflecting plate 220 is illustrated as having a flat shape, but may be manufactured in a curved shape having a reference reflecting surface and a triangular protrusion protruding from the reference reflecting surface. The reflector 220 may be omitted as necessary.

The plurality of optical sheets 230 include a diffusion sheet and a brightness enhancing sheet, which are disposed above the lamp unit 210 to uniform the luminance distribution of the emitted light. The diffusion sheet directs the light incident from the lamp unit 210 toward the front of the display panel 100 and diffuses the light to have a uniform distribution in a wide range so that the display panel 100 is irradiated. As the diffusion sheet, it is preferable to use a film composed of a transparent resin coated with a predetermined light diffusion member on both surfaces. The brightness enhancing sheet transmits light parallel to its transmission axis and reflects light perpendicular to the transmission axis. The reflected light is reflected back by the lower reflector. As a result, the luminance improving sheet may reduce light loss and transmit light in a predetermined direction (direction parallel to the transmission axis). Of course, the optical sheet 230 may further include a polarizing sheet.

The accommodating members 310, 320; 300 may include an upper accommodating member 310 and a lower accommodating member 320. The display panel 100 and the backlight 200 may be accommodated through the upper accommodating member 310 and the lower accommodating member 320 to prevent their separation and to prevent damage to the display panel and the backlight from external shock. have. The lower accommodating member 320 is formed in a box shape of a rectangular parallelepiped having an upper surface open, and an accommodating space having a predetermined depth is provided therein. The backlight unit 200 is accommodated in the lower accommodating member 320, and a portion of the display panel 100 is accommodated. The upper accommodating member 310 is formed in a rectangular frame shape having an empty center and prevents the display panel 100 and the backlight 200 from being accommodated in the lower accommodating member 230 from being separated. Although not shown, the accommodating member 300 may further include a mold frame provided between the upper accommodating member 310 and the lower accommodating member 320.

A control board 400 and an inverter board 500 are provided below the lower accommodating member 320, and the control board 400 and the inverter board 500 are detachably coupled to each other.

The control board 400 includes a control body 410, a signal input connector 420, a signal output connector 430, and a control power input connector 440. Although not shown, a control board 400 is provided on the control body 410 and electrically connected to the signal input connector 420, the signal output connector 430, and the control power input connector 440. It includes a plurality of circuit units for generating a control signal in accordance with an external signal applied from the outside. The circuit unit is preferably mounted on the control body 410 in the form of an IC chip. The plurality of circuit units may include a gate driver, a data driver, a gate power supply, a signal converter, and a timing control path. In this case, the gate driver may be provided on the lower substrate of the display panel. The control signal generated by the circuit unit is applied to the display panel 100 to represent various images. In this case, the flexible printed circuit board 600 is used for electrical connection between the control board 400 and the display panel 100.

It is preferable to use a printed circuit board as the control body portion 410. And as shown in the figure, one side of the control body portion 410 is provided with a detachable pattern (P) for detachment with the inverter board 500. The control body 410 of the present embodiment is manufactured in a substantially rectangular shape. A detachable pattern P is provided in one long side region of two long sides of the control body 410. In FIG. 2, a detachable pattern P is formed in a long side region located in the left region from the center of the control body 410. In addition, signal input connectors 420 and signal output connectors 430 are disposed in regions adjacent to two short sides of the control body 410, respectively. As shown in FIG. 2, a signal output connector 430 is disposed at a short side region located above the center of the control body 410, and a short side region positioned below the center of the control body 410. The signal input connector 420 is disposed in the. The control power input connector 440 is disposed in a long side region in which the detachable pattern P is not formed. The control board 400 converts an external signal provided from the signal input connector 420 into a control signal through an internal furnace, and converts the converted control signal into a flexible printed circuit board 600 connected to the signal output connector 430. The display panel 100 is provided through the display panel 100.

The inverter board 500 includes an inverter body 510, a plurality of lamp connection connectors 520, and an inverter power input connector 530. And although not shown, the inverter board 500 further includes a power converter for generating the lamp power by converting the inverter power applied from the outside. In this case, the power converter may include a rectifier, an inverter, and a transformer.

It is preferable to use a printed circuit board as the inverter body portion 510. A detachable pattern P corresponding to a detachable pattern P of the control board 400 is provided at one side of the inverter body 510. The inverter body 510 is manufactured in a substantially rectangular shape as shown in FIG. Therefore, the detachable pattern P is formed in the long side region positioned in the right region from the center of the inverter body 510. In addition, a plurality of lamp connection connectors 520 are disposed in a long side region located in a left region at the center of the inverter body 510. The inverter board 500 converts external power applied through the inverter power input connector 530 into lamp power and provides the lamp power to the lamp unit 210 connected through the lamp connection connector 520.

As such, in the present embodiment, the inverter board 500 and the control board 400 can be easily coupled to the inverter board 500 and the control board 400 through a detachable pattern P, thereby simplifying their assembly process. have. Furthermore, when the inverter body 510 and the control body 410 are manufactured in a single body, and when the above-described detachable pattern P is formed in the boundary area thereof, the inverter board 500 without increasing the manufacturing process. ) And the control board 400 can be manufactured at the same time. 3, the inverter board 500 and the control board through a detachable pattern P of the inverter body 510 of the inverter board 500 and the control body 410 of the control board 400. The 400 can be easily separated to improve the rework process capability. That is, as described above, when the inverter board 500 and the control board 400 are manufactured in a single body, when a failure occurs in any one of the inverter board 500 or the control board 400, the failure does not occur. There is a disadvantage that the inverter board 500 or the control board 400 must be replaced at the same time. However, as in the present embodiment, the inverter board 500 and the control board 400 may be separated through the detachable pattern P, thereby replacing only the board in which the defect occurs among the inverter board 500 and the control board 400. This can improve your rework ability. The inverter board 500 and the control board 400 are coupled to the rear surface of the lower accommodating member 320 through a screw. At this time, as described above, since the inverter board 500 and the control board 400 are manufactured in a single body, the number of coupling members used to couple them to the rear surface of the lower housing member 320 may be reduced. It is effective to use a screw as the coupling member.

The detachable pattern P is preferably manufactured in a saw blade shape. In this case, the detachable pattern P includes a plurality of protrusions protruding in a quadrangular shape and a plurality of recesses recessed as shown in FIG. 3. The protrusion of the control board 400 is inserted into the recess of the inverter board 500, and the protrusion of the inverter board 500 is inserted into the recess of the control board 400. Through this, the inverter board 500 and the control board 400 may be engaged with each other through a detachable pattern to combine the inverter board 500 and the control board 400. Of course, the present invention is not limited thereto, and as in the modification of FIG. 4, the detachable pattern P includes a plurality of protrusions protruding in a substantially triangular form and a plurality of recesses recessed in a triangular form. In this case, the triangular protrusion is inserted into the triangular recess. Through this, the protrusion may not be separated from the recess.

As such, in the present embodiment, the control board 400 and the inverter board 500 may be combined with each other through a detachable pattern P to be used as one material. Therefore, conventionally, since the control board 400 and the inverter board 500 have to be managed separately with separate materials, the material management is complicated. However, as described above, the control board 400 and the inverter board 500 are divided into one. Material management can be facilitated by managing the material.

As shown in FIG. 5, the display device according to the present exemplary embodiment further includes a shield case 700 for blocking electromagnetic wave emission from the control board 400 and the inverter board 500. The control board 400 and the inverter board 500 are coupled as one body by a detachable pattern (P). Therefore, it is preferable to manufacture the shield case 700 as a single body so as to cover the combined control board 400 and the inverter board 500 at once. At this time, the shield case 700 is manufactured in a plate shape protruding the upper region as shown in the figure. That is, it is manufactured in an inverted L-shape. Shield case 700 is manufactured through a mold process. Therefore, it is possible to reduce the material loss of the mold process through the mold punching so that adjacent protruding regions are staggered to improve the efficiency of the mold process. For example, one side is in the shape of 'L' and the adjacent area is in the shape of 'B'. Through this, the two shield cases 700 may be manufactured through a single mold punching, thereby reducing the shield case manufacturing cost and reducing the mold cost.

As described above, the present invention combines the inverter board and the control board so that they can be treated as a single material to simplify the manufacturing process of the display device.

In addition, the present invention is made so that the inverter board and the control board detachable, if any one of the board failure occurs, it is possible to selectively replace only the board in which the failure occurs can improve the rework (rework) ability.

In addition, the present invention can manufacture a shield case for shielding electromagnetic waves of the inverter board and the control board as a single body, it is possible to simplify the manufacturing process of the shield case to reduce its manufacturing cost.

Although the invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the invention is not limited thereto, but is defined by the claims that follow. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the spirit of the following claims.

Claims (8)

A backlight unit generating light; A display panel displaying an image; An accommodation member accommodating the backlight unit and the display panel; A control board providing a signal for expressing the image to the display panel; And And an inverter board detachably coupled to the control board and providing power to the backlight to generate light. The method according to claim 1, A display device in which a control detachment pattern is provided in one region of the control board and an inverter detachment pattern corresponding to the control detachment pattern is provided in at least one region of the inverter board to detachably couple the control board and the inverter board. . The method according to claim 1, The control and inverter detachment pattern may include a protrusion in which one side of the control board and the inverter board protrude and a recessed recess. The method according to claim 3, The protrusion and the recess are rectangular or triangular. The method according to claim 1, And a flexible printed circuit board electrically connecting the control board and the display panel. The method according to claim 1, The control board further includes a signal input and a signal output connector respectively provided on the upper and lower surface areas intersecting the detachable surface detachable from the inverter board. The method according to claim 1, The inverter board further includes a plurality of lamp connection connectors provided on a surface area opposite to a detachable surface detachable from the control board, and a power input connector provided on a lower area of the detachable surface. The method according to claim 1, And a shield case covering the coupled inverter board and the control board and provided as a single body.

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