KR20050075214A - Liquid crystal display provided with a digitizer - Google Patents

Abstract

The present invention provides a liquid crystal display panel assembly in which an image is displayed, a backlight assembly providing light to the liquid crystal display panel assembly, a mold frame in which the liquid crystal display panel assembly and the backlight are supported, and a digitizer connected to the mold frame. It includes, and the digitizer is in close contact with the side of the mold frame is configured to be detachably fixed thereto.

Description

Liquid Crystal Display with Digitizer {LIQUID CRYSTAL DISPLAY PROVIDED WITH A DIGITIZER}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having a digitizer (DIGITIZER).

With the recent development of semiconductor technology, which is rapidly developing in recent years, the demand for flat panel display devices that are smaller and lighter and has improved performance is exploding.

Among these flat panel displays, liquid crystal displays (LCDs), which have recently been in the spotlight, have advantages such as miniaturization, light weight, and low power consumption, so that they can overcome the disadvantages of the conventional cathode ray tube (CRT). As an alternative means, it has been gradually attracting attention, and is currently used in almost all information processing equipment that requires a display device.

A general liquid crystal display device applies a voltage to a specific molecular array of a liquid crystal to convert it into another molecular array, and visually changes optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of the liquid crystal cell emitted by the molecular array. It is a display apparatus which displays information using the modulation of the light by a liquid crystal cell as converting into a change.

Such a liquid crystal display device includes a liquid crystal display panel assembly in which an image is largely displayed, and a backlight assembly that provides light for driving with the liquid crystal display panel assembly. The liquid crystal display panel assembly and the backlight assembly are commonly referred to as mold frames. It is supported by the frame to form a liquid crystal display module.

The liquid crystal display module is formed with characteristics of each according to the specifications of the liquid crystal display device, but basically the liquid crystal display panel assembly and the backlight assembly are mounted to the above-described mold frame, and the assemblies are mounted from above from the mold frame. The top chassis for fixing to the mold frame has a structure coupled to the mold frame. The backlight assembly generally includes a lamp as a light source, a light guide plate for transforming the light emitted from the lamp into a surface light source, and a reflecting plate and an optical sheet for increasing the utilization efficiency of the light emitted from the lamp.

In addition, in recent years, a product called a tablet PC to which a digitizer is applied as an input device of the liquid crystal display device has been proposed in order to perform graphic work on a liquid crystal display panel having high resolution.

The digitizer may be divided into various methods according to a method of detecting a position indicated by a user, and a digitizer using a dual magnetic method may be an example, in which a magnetic field is applied to detect a selected position as a change in voltage. do.

In the liquid crystal display module, the digitizer is typically disposed on the rear surface of the backlight assembly and electrically connected to the liquid crystal display panel assembly to be physically connected to and fixed to the configuration of the liquid crystal display module.

4, the digitizer 12 is mounted on the mold frame 10 in which the liquid crystal display panel assembly (not shown) is accommodated. 14 is mechanically connected to and fixed to the liquid crystal display panel assembly. Of course, the digitizer is also electrically connected to the liquid crystal display panel assembly by an electrical connection means (for example, a conductive tape) not shown.

In addition, as shown in FIG. 5, the digitizer 20 is disposed on the mold frame 22 as in the above-described example, and does not pass through the fixing member such as tape, but through the member such as the screw 24. It may be fixed to the frame 22.

However, in the fixed structure of the digitizer as described above, there is a disadvantage in each of the disadvantages to reduce the manufacturing productivity and to configure a compact liquid crystal display device.

That is, in the above-described fixing structure of the digitizer, there is an advantage that the outline of the liquid crystal display module does not need to be increased separately to fix the digitizer. It is difficult to fix it, and also in some cases, it is difficult to reposition the fixed digitizer once it is fixed again.

On the contrary, in the fixing structure of the digitizer described below, since it is fixed by screwing, it may have an advantage in so-called rework unlike the above example, but the fastening part for screwing is formed from the sidewall of the mold frame. Since it protrudes and forms, there exists a burden of extending the outline of a liquid crystal display module by this fastening part.

In view of the above problems, the present invention improves the fixing structure of the digitizer, so that the fastening of the digitizer can be accurately and firmly performed without expanding the outline of the liquid crystal display module.

The liquid crystal display according to the present invention includes a liquid crystal display panel assembly in which an image is displayed, a backlight assembly providing light to the liquid crystal display panel assembly, a mold frame in which the liquid crystal display panel assembly and the backlight are supported, and the mold. It includes a digitizer connected to the frame, the digitizer is formed to be in close contact with the side of the mold frame to be detachably fixed thereto.

The digitizer may include a main body part disposed on one surface of the mold frame and a fixing part protruding from an edge of the main body part to be fixed to the side of the mold frame.

In addition, the fixing portion may be formed in plural at a predetermined interval on at least one side opposite to the main body portion, wherein the fixing portion by a screw coupled to the screw groove formed on the side of the mold frame Can be fixedly installed.

Further, a top chassis supporting the liquid crystal display panel assembly and the backlight assembly is disposed along the upper side and the edge of the mold frame, and the top chassis is fixed to the side of the mold frame by the screw together with the fixing part. Can be.

In addition, the liquid crystal display device according to the present invention, a liquid crystal display panel assembly that displays an image, a backlight assembly for providing light to the liquid crystal display panel assembly, a mold frame for supporting the liquid crystal display panel assembly and the backlight; It is formed to include a digitizer disposed on one surface of the mold frame and a fixing member connected to the digitizer and in close contact with the side of the mold frame to be detachably fixed.

The fixing member may attach one side thereof to the digitizer and the other side may be fixed to the side of the mold frame. In this case, the fixing member may have adhesiveness only to an attachment portion of the digitizer.

Here, the fixing member may be fixedly installed by a screw coupled to the screw groove formed on the side of the mold frame.

Furthermore, a top chassis for supporting the liquid crystal display panel assembly and the backlight assembly is disposed along the upper side and the edge of the mold frame, and the top chassis is fixed to the side of the mold frame by the screw together with the fixing member. Can be.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. These embodiments of the present invention are merely for illustrating the present invention, but the present invention is not limited thereto.

1 is a partial perspective view of a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view of main parts of the liquid crystal display shown in FIG. 1.

As shown in FIG. 1, the liquid crystal display device 100 according to an exemplary embodiment of the present invention includes a backlight assembly 200 and a liquid crystal display panel assembly 300 positioned thereon to display an image. The liquid crystal display panel assembly 300 includes a liquid crystal display panel 30, a gate TCP 31, a data TCP 32, and the like connected to the gate line and the data line of the liquid crystal display panel 30, respectively. The liquid crystal display panel assembly 300 is coupled to and supported by an upper side of the mold frame 40 in which the backlight assembly 200 is accommodated.

The liquid crystal display panel 30 is a thin film transistor (TFT), hereinafter referred to as TFT. The substrate 36 and the color filter substrate 37 disposed on the TFT substrate 36 and between the substrates are formed. It includes a liquid crystal (not shown) that is injected into. A thin film transistor (not shown) that performs a switching role is formed in the TFT substrate 36, a gate line is connected to a gate electrode of each thin film transistor, a data line is connected to a source electrode, and a drain electrode. The pixel electrode is formed.

The data line and the gate line are electrically connected to the data printed circuit board B (PCB, hereinafter referred to as PCB for convenience) 35 and the gate PCB 34 through the data TCP 32 and the gate TCP 31, respectively. Is connected.

When an electrical signal is received from the outside through the data PCB 35 and the gate PCB 34 by the configuration thereof, the data PCB 35 and the gate PCB 34 drive and drive the liquid crystal display panel 30. The driving signal and the timing signal for controlling the control signal are transmitted to the gate line and the data line through the data TCP 32 and the gate TCP 31, respectively.

On the other hand, the color filter substrate 37 forms R, G, and B pixels for displaying color images. The common electrode is formed on the front surface of the color filter substrate 37.

When a driving voltage is applied to the liquid crystal display panel assembly 300, an electric field is formed between the common electrode and the pixel electrode of the thin film transistor to change the arrangement of liquid crystals located therebetween. In this case, since the liquid crystal display panel 30 is a light receiving element that does not emit light by itself, light is provided to the liquid crystal display panel 30 under the liquid crystal display panel assembly 300, that is, in the light backlight assembly 200. .

Typically, the backlight assembly 200 includes a lamp unit for generating light, a light guide plate for guiding light generated from the lamp unit to the liquid crystal display panel 30, and an inverter electrically connected to the lamp unit to supply a driving voltage. An assembly or the like.

In addition, a top chassis 400 for supporting the liquid crystal display panel assembly 300 and the backlight assembly 200 is disposed at an upper side of the liquid crystal display panel assembly 300 and an edge of the mold frame 40. .

The liquid crystal display 100 further includes a digitizer 500 as an input device. Here, the digitizer 500 is closely disposed on one surface of the mold frame 40, that is, the lower side on the basis of the drawing. Since the specific structure has a structure of a conventional digitizer, detailed description thereof will be omitted. Shall be.

In the present invention, the digitizer 500, while being disposed in the above position to form a fixed portion on the side of the mold frame 40, for this purpose, the digitizer 500 is the main line is installed therein A body portion 502 and a fixing portion 504 protruding from the edge of the main body portion 502 is fixed to the side of the mold frame 40.

The fixing part 504 is formed integrally with the main body part 502 and the side of the mold frame 40 in a state in which the digitizer 500 is disposed on the front surface of one side of the mold frame 50. Is banded toward and coupled to it via screws 60.

To this end, the main body portion 502 and the fixing portion 504 is made of a flexible (flexible) material so as to be easily bent between the boundaries, the bending portion in advance by the bending process such as bending line It is preferable to be set.

In addition, a hole through which the screw 60 may be formed is formed in the fixing part 504 for the screw coupling, and a screw groove 40a to which the screw 60 is coupled to the side of the mold frame 40. ) Is formed.

In the present embodiment, when the digitizer 500 is fixed to the mold frame 40 in the above structure, as shown in FIG. 2, the top chassis 400 also has the digitizer ( It may be fixed to the mold frame 40 together with 500, but this fixing structure is only one example that can be implemented in the present invention, the present invention is not necessarily limited thereto. In some cases, the top chassis 400 may be removed and only the digitizer 500 may be fixed to the side of the mold frame 40.

In addition, in the present embodiment, the fixing part 504 is provided in plural (2 in this embodiment) at arbitrary intervals on the opposite side of the main body part 502, that is, the short side of the main body part 502. It is formed as a dog, but this is also just one example, if necessary, including all the long side of the main body portion 502 may be fixed to each side of the mold frame 40.

As described above, when the digitizer 500 is fixed to the module of the liquid crystal display device 100, the liquid crystal display device 100 may firmly secure the digitizer 500 without increasing its outline. It is possible to fix in the correct position, which is fixed to the part of the digitizer 500 made of a thin film in close contact with the side of the mold frame 40, from which the substantial increase in the outline of the liquid crystal display device 100 It is hard to be caused, and since it is detachably coupled through screwing, the fixing in place is sufficient because it can have a sufficient response even in repeatability of detachment.

3 is a partial cross-sectional view showing a fixing structure of a digitizer according to another embodiment of the present invention.

In this embodiment, the digitizer 500 is fixed to the side of the mold frame 40 as in the above-described example, but does not have a fixing part by itself, and is connected to the mold frame 40 through a separate fixing member. It is fixed.

As shown in the drawing, one side of the fixing member may be attached to the digitizer 500, and one side of the fixing member may be formed of a tape 70 screwed to a side of the mold frame 40. The tape 70 may be replaced by a flexible member such as a film in some cases.

In this case, the tape 70 has adhesiveness only at the attachment site with the digitizer 500 because the fixed reworkability is taken into consideration when the tape 70 is fixed to the side of the mold frame 40.

In this other embodiment, the configuration for screwing is made in the same manner as in the above-described embodiment, but in the above-described embodiment, since the hole formed in the fixing portion is formed in the non-adhesive portion of the tape 70, the detail Configuration description and operation will be replaced by the above embodiment.

As described above, in the liquid crystal display device of the present invention, the digitizer can be fixed without increasing the outline of the module by fixing the digitizer to the side of the mold frame on which the digitizer is supported without modification of the configuration constituting the module. Benefit from a compact configuration.

In addition, since the digitizer is fixed by means such as screwing, the liquid crystal display device of the present invention can be easily attached and detached, thereby increasing the efficiency of reworkability during the actual manufacturing operation and thus improving productivity.

Although the present invention has been described above, it will be readily understood by those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the claims set out below.

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

FIG. 2 is a cross-sectional view illustrating main parts of the LCD of FIG. 1.

3 is a partial cross-sectional view of a liquid crystal display according to another exemplary embodiment of the present invention.

4 and 5 are perspective views illustrating a fixed state of a digitizer in a general liquid crystal display.

Claims (10)

A liquid crystal display panel assembly in which an image is displayed; A backlight assembly providing light to the liquid crystal display panel assembly; A mold frame in which the liquid crystal display panel assembly and the backlight are supported; And Digitizer connected to the mold frame Including, And the digitizer is fixed to the side of the mold frame to be detachably fixed. The method of claim 1, And a fixing part protruding from an edge of the main body part and fixed to a side of the mold frame, wherein the digitizer is disposed on one surface of the mold frame. The method of claim 2, And a plurality of fixing parts formed at a predetermined interval on at least one side of the main body part facing each other. The method according to any one of claims 1 to 3, And the fixing part is fixedly installed by a screw coupled to a screw groove formed on a side of the mold frame. The method of claim 4, wherein A top chassis supporting the liquid crystal display panel assembly and the backlight assembly is disposed along the upper side and the edge of the mold frame, and the top chassis is fixed to the side of the mold frame by the screw together with the fixing part. Device. A liquid crystal display panel assembly in which an image is displayed; A backlight assembly providing light to the liquid crystal display panel assembly; A mold frame in which the liquid crystal display panel assembly and the backlight are supported; A digitizer disposed on one surface of the mold frame; And A fixing member which is connected to the digitizer and fixedly detachably attached to the side of the mold frame Liquid crystal display comprising a. The method of claim 6, The fixing member, One side thereof is attached to the digitizer and the other side is fixed to the side of the mold frame. The method of claim 7, wherein And the fixing member has adhesiveness only to an attachment portion of the digitizer. The method according to any one of claims 6 to 8, And the fixing member is fixedly installed by a screw coupled to a screw groove formed on a side surface of the mold frame. The method of claim 9, A top chassis supporting the liquid crystal display panel assembly and the backlight assembly is disposed along the upper side and the edge of the mold frame, and the top chassis is fixed to the side of the mold frame by the screw together with the fixing member. Device.