KR20070017697A - Display device for improving a combining structure - Google Patents

Abstract

The present invention relates to a display device having an improved fastening structure. The display device according to the present invention includes a panel unit for displaying an image, a first fixing member accommodating the panel unit, and a second fixing member fastened to the first fixing member. One side portion of the second fixing member covers one side portion of the first fixing member to block one side portion of the first fixing member from the outside, and one side portion of the second fixing member is fastened and fixed to one side portion of the first fixing member. .

Display, fastening, fixing member, side part

Description

Display device with improved fastening structure {DISPLAY DEVICE FOR IMPROVING A COMBINING STRUCTURE}

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

2 is a rear perspective view of a display device according to an exemplary embodiment.

3 is an enlarged view of a portion A of FIG. 2.

4 is a driving block diagram of a panel unit included in the display device of FIG. 1.

5 is an equivalent circuit diagram of one pixel of the panel unit.

The present invention relates to a display device, and more particularly, to a display device having an improved fastening structure.

With the recent development of semiconductor technology, which is rapidly developing in recent years, the demand for display devices with smaller and lighter weight and improved performance has exploded.

Among these display devices, liquid crystal displays (LCDs), which have recently been in the spotlight, have advantages such as miniaturization, weight reduction, and low power consumption, so that they can overcome the disadvantages of the conventional cathode ray tube (CRT). It has been attracting attention as an alternative means, and now it is being installed and used in not only mobile phones and portable digital assistors (PDAs), which are small products requiring display devices, but also monitors and TVs, which are medium and large products.

A general liquid crystal display device applies 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 device which displays information using the modulation of the light by a liquid crystal cell as converting into a change.

Recently, organic light emitting display (OLED) has been in the spotlight as one of the next generation display devices. The organic light emitting display displays an image by using a self-luminescence phenomenon in which electrons and holes injected from a cathode and an anode combine in an organic material to emit light. Since the organic light emitting display device is an active device that emits light by itself, the light emitting efficiency is high, the power consumption is low, and the organic light emitting display device can be driven at 15V or less, making it suitable as a small display device and having low manufacturing cost.

Therefore, the liquid crystal display device or the organic light emitting display device described above is adopted in most of the small display devices used in mobile phones and the like. The small display device does not use a separate fastening member such as a screw to assemble the component in order to minimize its volume. Instead, convex portions and concave portions for fastening are formed in each component. Therefore, the parts can be firmly assembled to each other.

If the coupling structure becomes simple, the fastening force may be weakened, thereby degrading the durability of the display device. In contrast, the more complex the coupling structure, the tighter the coupling is but the more difficult the rework is. That is, since it is difficult to disassemble the display device during repair, internal parts of the display device are damaged when the display device is disassembled with a strong force. In addition, since the coupling structure becomes complicated, there is a problem in that manufacturing cost increases when using a method such as injection molding.

When an opening is formed in the part for fastening, external foreign matter penetrates into the display device through the opening. External foreign matter penetrating into the display device deteriorates the performance of the display device, such as degrading image quality or generating a short circuit.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and an object of the present invention is to provide a display device having a structure in which a fastening force is improved by improving a fastening structure and a structure that is not only easy to rework but also does not easily penetrate foreign matter.

The display device according to the present invention includes a panel unit for displaying an image, a first fixing member accommodating the panel unit, and a second fixing member fastened to the first fixing member. One side portion of the second fixing member covers one side portion of the first fixing member to block one side portion of the first fixing member from the outside, and one side portion of the second fixing member is fastened and fixed to one side portion of the first fixing member. .

Preferably, the stepped portions are formed on one side portion of the first fixing member and one side portion of the second fixing member.

The second fixing member may further include a flat portion connected to one side portion thereof, and the one side portion may be bent and connected from the flat portion.

Preferably, the stepped portion extends in the direction crossing the bending direction of the one side portion.

One side portion of the second fixing member may include a first side portion bent from the planar portion and a second side portion sharing the step portion with the first side portion.

It is preferable that the thickness of a 2nd side part is larger than the thickness of a 1st side part.

The second side portion may be bent and overlapped.

The outer surface of the bent second side portion and the outer surface of the first side portion are preferably located on substantially the same virtual surface.

The first side portion may be bent toward the first fixing member side to be connected to the second side portion to form a stepped portion.

One side portion of the first fixing member may include a first side portion corresponding to the first side portion of the second fixing member and a second side portion corresponding to the second side portion of the second fixing member.

The first fixing member may include a pair of side surfaces facing each other, and the separation distance between the outer surfaces of the second side portion of the pair of one side portions may be smaller than the separation distance between the outer surfaces of the first side portion.

The second fixing member may be fastened and fixed to the first fixing member on the opposite side of the panel unit with the first fixing member interposed therebetween.

It is preferable that a 1st fixing member is formed from a resin raw material.

It is preferable that the second fixing member is formed of a metal material.

The display device according to the present invention may further include a light source for supplying light to the panel unit, and the panel unit may be a liquid crystal display panel.

It is preferable that the display device is for a cellular phone.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5. These embodiments of the present invention are merely for illustrating the present invention, but the present invention is not limited thereto.

1 illustrates an exploded view of the display device 100 according to an exemplary embodiment. The structure of the display device 100 shown in FIG. 1 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the display device 100 may be modified in another form. In addition, although the liquid crystal display panel is shown as the panel unit 75 in FIG. 1, this is only for illustrating the present invention and the present invention is not limited thereto. Therefore, an organic light emitting panel may be used instead of the liquid crystal display panel.

The display device 100 shown in FIG. 1 can be used for a mobile phone. In particular, it is suitable for use for the recently used sliding cell phone. The display device 100 does not include a separate fixing member thereon to simplify the structure. Therefore, the panel unit 75 is assembled while being exposed to the outside and stored in a mobile phone or the like.

The display device 100 shown in FIG. 1 includes a panel unit assembly 70 for displaying an image and a light source 50 for supplying light to the panel unit 75. The first fixing member 62 and the second fixing member 66 are installed to fix the panel unit assembly 70 and the light source 50. In addition, the display device 100 may further include other components as necessary.

The panel unit assembly 70 shown in FIG. 1 includes a panel unit 75, an integrated circuit chip (IC chip) 77, a flexible printed circuit film (FPC) 74, and the like. It includes. The integrated circuit chip 77 is protected by a protective film 78 surrounding it. The flexible printed circuit film 74 receives a driving signal from a flexible printed circuit board (FPCB) 68 penetrating through the opening 665 of the second fixing member 66 and the panel unit 75. To be sent). Although the flexible printed circuit film 74 is shown in the broken state in FIG. 1, it is actually connected.

The panel unit 75 includes a color filter panel 71 and a TFT (thin film transistor) panel 73. The TFT panel 73 is a transparent glass panel in which matrix thin film transistors are formed. A data line is connected to a source terminal, and a gate line is connected to a gate terminal. In the drain terminal, a pixel electrode made of transparent indium tin oxide (ITO) as a conductive material is formed.

When driving signals are input from the flexible printed circuit board 68 to the data lines and the gate lines of the TFT panel 73, electrical signals are input to the source terminal and the gate terminal of the TFT, and the TFTs are input according to the input of these electrical signals. Is turned on or turned off so that an electrical signal necessary for pixel formation is output to the drain terminal.

On the other hand, a color filter panel 71 is disposed thereon opposite the TFT panel 73. The color filter panel 71 is a substrate in which RGB pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process, and a common electrode made of ITO is coated on the entire surface thereof. When power is applied to the gate terminal and the source terminal of the TFT and the thin film transistor is turned on, an electric field is formed between the pixel electrode and the common electrode of the color filter panel 71. By this electric field, the arrangement angle of the liquid crystal injected between the TFT panel 73 and the color filter panel 71 is changed, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel. Polarizers (not shown) are attached to both surfaces of the TFT panel 73 and the color filter panel 71 to polarize light.

The integrated circuit chip 77 generates a plurality of timing signals for applying the data driving signal and the gate driving signal for driving the panel unit 75 at an appropriate time. The integrated circuit chip 77 applies a drive signal and a timing signal to the gate line and the data line of the TFT to control the arrangement angle of the liquid crystals of the panel unit 75 and the timing when the liquid crystals are arranged.

The light source 50 that provides light to the panel unit 75 is fixed to the first fixing member 62. The light source 50 is mounted on the flexible printed circuit board 52 to receive a driving voltage from the outside. Although a light emitting diode (LED) is shown as a light source 50 in FIG. 1, this is merely to illustrate the present invention and the present invention is not limited thereto. Therefore, other types of light sources other than light emitting diodes can be used.

Light emitted from the light source 50 is incident on the light guide plate 44 and is evenly spread. A portion of the light evenly diffused in the light guide plate 44 is reflected by the lower reflective sheet 46 and directed toward the panel unit 75 side. Therefore, light loss can be minimized. A plurality of optical sheets 48 are provided on the light guide plate 44 to improve the brightness of light emitted from the light guide plate 44. Therefore, the light with improved brightness can be provided to the panel unit 75.

The first fixing member 62 and the second fixing member 66 are used to fix the internal parts of the display device 100. The first fixing member 62 accommodates the panel unit 75, and the second fixing member 66 is fastened and fixed to the first fixing member 62. The second fixing member 66 is positioned opposite the panel unit 75 with the first fixing member 62 interposed therebetween. Since the second fixing member 66 is fastened and fixed to the first fixing member 62 on the opposite side of the panel unit 75, the panel fixing unit 75 may be more firmly fixed.

The first fixing member 62 may be made of a resin material, and the second fixing member 66 may be made of a metal material. Other materials may also be used. In order to form one side portion 621 of the first fixing member 62 which is more or less complicated, the first fixing member 62 is preferably manufactured by an injection molding method. On the other hand, when the second fixing member 66 is made of a metal material, a metal sheet can be used. Since the shape of the second fixing member 66 is relatively simple, the second fixing member 66 can be manufactured by a method such as bending or punching.

In the display device 100, one side portion 661 of the second fixing member 66 covers one side portion 621 of the first fixing member 62. In this manner, one side portion 661 of the second fixing member 66 is fastened to one side portion 621 of the first fixing member 62. One side portion 661 of the second fixing member 66 completely covers one side portion 621 of the first fixing member 62 to block one side portion 621 of the first fixing member 62 from the outside. Accordingly, the fastening between the first fixing member 62 and the second fixing member 66 is securely performed. That is, since the fastening is performed over the entire surface of the one side portion, the first fixing member 62 and the second fixing member 66 are firmly fastened to a degree comparable to the conventional one. In addition, since one side portion 621 of the first fixing member 62 is completely blocked from the outside, foreign matter cannot penetrate into the display device 100 through the first fixing member 62. Therefore, durability of the display device 100 can be improved.

As shown in FIG. 1, step portions 6212 and 6612 (shown in FIG. 3) are provided at one side portion 621 of the first fixing member 62 and one side portion 661 of the second fixing member 66. Each is formed. By using the stepped portion, one side portion 621 of the first fixing member 62 and one side portion 661 of the second fixing member 66 may be firmly assembled. The stepped portion will be described in more detail later with reference to FIG. 3.

2 illustrates a state in which the display device 100 illustrated in FIG. 1 is coupled. For convenience of explanation, the display device 100 shown in FIG. 1 is shown upside down in FIG. 2.

The second fixing member 66 includes one side portion 661 and a planar portion 663 connected thereto. One side part 661 is connected in the lateral direction (X-axis direction) of the planar part 663. One side portion 661 is bent from the planar portion 663. The second fixing member 66 can be easily bent to manufacture as shown in FIG. 2.

As shown in FIG. 2, the first fixing member 62 includes a pair of side portions 621 facing each other. The pair of side parts 621 face in the X-axis direction. Each one side portion 621 includes a first side portion 6211 and a second side portion 6213. The separation distance d ₂ between the outer surfaces of the first side surface portion 6141 is smaller than the separation distance d ₁ between the outer surfaces of the second side surface portion 6613. Since the separation distance d ₂ is smaller than the separation distance d ₁ , the second fixing member 66 is advantageous for wrapping and fixing the first fixing member 62. Therefore, the first fixing member 62 can be stably fixed while covering the second fixing member 66.

A fastening structure between the first fixing member 62 and the second fixing member 66 will be described in more detail with reference to FIG. 3.

3 is an enlarged view of a portion A of FIG. 2. One side portion 661 of the second fixing member 66 is bent from the planar portion 663 in the -Z axis direction. On the other hand, the step portion 6612 of the second fixing member 66 extends long in the Y-axis direction, which is a direction crossing the Z-axis direction. Therefore, the second fixing member 66 can be detached from or coupled to the first fixing member 62 in a sliding manner along the Y-axis direction. Since the step portion 6612 is not large in size, the second fixing member 66 may be separated from or coupled to the first fixing member 62 in the Z-axis direction. As a result, the rework of the display device 100 becomes easy. When the display device 100 is repaired, the second fixing member 66 can be easily removed from the first fixing member 62.

One side portion 661 of the second fixing member 66 includes a first side portion 6611 and a second side portion 6613. The first side portion 6611 and the second side portion 6613 are divided by the step portion 6612 in a boundary. The first side portion 6611 and the second side portion 6613 have different shapes so that the second fixing member 66 is firmly coupled to the first fixing member 62. The first side portion 6611 is bent from the planar portion 663. The second side portion 6613 shares the step portion 6612 with the first side portion 6611.

In one side portion 661 of the second fixing member 66 shown in FIG. 3, the thickness W ₂ of the second side portion 6613 is greater than the thickness W ₁ of the first side portion 6611. This is because the second side portion 6613 is bent and overlapped. Therefore, since the strength of the second side portion 6613 is increased, it can withstand external shocks sufficiently. In addition, since the second side surface portion 6613 is bent and closely adhered to the first fixing member 62, the fastening structure is further strengthened.

The enlarged circle of FIG. 3 shows the state seen from the Y-axis direction by enlarging the inside of a dotted circle. As shown in the enlarged circle of FIG. 3, the outer surface of the first side portion 6611 and the outer surface of the second side portion 6613 are located on the same virtual surface S. As shown in FIG. Accordingly, since neither of the first side portion 6611 and the second side portion 6613 is protruded to the outside, the display device 100 can be easily assembled and its structure is robust.

The first side portion 6611 included in the one side portion 661 of the second fixing member 66 is bent back to the first fixing member 62 side. As the bend is formed, the first side portion 6611 is connected to the second side portion 6613 to form a step portion 6612. As described above, since one side portion 661 of the second fixing member 66 is bent inward, the fastening with the first fixing member 62 is easy.

One side portion 621 of the first fixing member 62 includes a first side portion 6211 and a second side portion 6213. Here, the first side portion 6211 corresponds to the first side portion 6611 of the second fixing member 66, and the second side portion 6213 corresponds to the second side portion 6613 of the second fixing member 66. do. Since each side part adheres closely, the fastening structure of the 1st fixing member 62 and the 2nd fixing member 66 is firm.

Hereinafter, the operation principle of the panel unit 75 will be described in more detail with reference to FIGS. 4 and 5.

The TFT panel 73 includes a plurality of display signal lines G ₁ -G _n , D ₁ -D _m , and the color filter panel 71 and the TFT panel 73 have display signal lines G ₁ -G _n , D ₁ -D _m ) and includes a plurality of pixels arranged in an approximately matrix form.

The display signal lines G ₁ -G _n and D ₁ -D _m are a plurality of gate lines G ₁ -G _n that transmit gate signals (also called “scan signals”) and data lines D that transfer data signals. ₁ -D _m ). The gate lines G ₁ -G _n extend substantially in the row direction and are substantially parallel to each other, and the data lines D ₁ -D _m extend substantially in the column direction and are substantially parallel to each other.

Each pixel includes a switching element Q connected to a display signal line G ₁ -G _n , D ₁ -D _m , and a liquid crystal capacitor C _LC and a storage capacitor C _ST connected thereto. It includes. The holding capacitor C _ST can be omitted as necessary.

The switching element Q, such as a thin film transistor, is provided in the TFT panel 73, and the control terminal and the input terminal thereof are three-terminal elements, respectively, with gate lines G ₁ -G _n and data lines D ₁ -D _m . The output terminal is connected to a liquid crystal capacitor (C _LC ) and a holding capacitor (C _ST ).

The liquid crystal capacitor C _LC uses the pixel electrode 190 of the TFT panel 73 and the common electrode 270 of the color filter panel 71 as two terminals, and the liquid crystal layer 3 between the two electrodes 190 and 270. Functions as a dielectric. The pixel electrode 190 is connected to the switching element Q, and the common electrode 270 is formed on the front surface of the color filter panel 71 and receives a common voltage V _com . Alternatively, the common electrode 270 may be provided in the TFT panel 73, and at least one of the two electrodes 190 and 270 may be formed in a linear or bar shape.

The storage capacitor C _ST , which serves as an auxiliary part of the liquid crystal capacitor C _LC , is formed by overlapping a separate signal line (not shown) and the pixel electrode 190 provided in the TFT panel 73 with an insulator interposed therebetween. A predetermined voltage such as the common voltage V _com is applied to this separate signal line. However, the storage capacitor C _ST may be formed such that the pixel electrode 190 overlaps the front end gate line directly above the insulator.

The signal controller 600 may control input image signals R, G, and B and display thereof from an external graphic controller (not shown), for example, a vertical synchronization signal Vsync and a horizontal synchronization signal Hsync. ), The main clock MCLK, and the data enable signal DE are provided. The signal controller 600 properly processes the image signals R, G, and B according to the operating conditions of the panel unit 75 based on the input image signals R, G, and B, and the input control signal. After generating the CONT1 and the data control signal CONT2, the signal controller 600 then emits the gate control signal CONT1 to the gate driver 400, and processes the data control signal CONT2 and the processed image signal DAT. Is sent to the data driver 500.

The gate control signal (CONT1) is such as at least one clock signal for controlling the output time and the output voltage of the start scan to indicate the start of output of a gate-on voltage (V _on) signal (STV), a gate-on voltage (V _on) Include.

The data control signal CONT2 includes a horizontal synchronization start signal STH indicating the start of transmission of the image data DAT, a load signal LOAD for applying a data voltage to the data lines D ₁ -D _m , and a common voltage V. _com ), the inversion signal RVS and the data clock signal HCLK for inverting the polarity of the data voltage with respect to the _com voltage (hereinafter, referred to as the polarity of the data voltage by reducing the polarity of the data voltage with respect to the common voltage).

In addition to these control signals CONT1 and CONT2, the signal controller 600 may export a control signal, a clock signal, and the like for controlling the operation of the light source 50 to the light source 50.

The data driver 500 sequentially receives and shifts the image data DAT for one row of pixels according to the data control signal CONT2 from the signal controller 600, and the gray voltage from the gray voltage generator 800. The grayscale voltage corresponding to each image data DAT is selected to convert the image data DAT into a corresponding data voltage, and then apply the grayscale voltage to the corresponding data lines D ₁ -D _m .

The gate driver 400 applies the gate-on voltage V _on to the gate lines G ₁ -G _n in response to the gate control signal CONT1 from the signal controller 600, thereby applying the gate lines G ₁ -G _n. ) Turns on the switching element Q connected thereto, so that the data voltage applied to the data lines D ₁ -D _m is applied to the corresponding pixel through the turned-on switching element Q.

The difference between the data voltage applied to the pixel and the common voltage V _com is shown as the charging voltage of the liquid crystal capacitor C _LC , that is, the pixel voltage. The liquid crystal molecules vary in arrangement depending on the magnitude of the pixel voltage.

After one horizontal period (or 1H) (one period of the horizontal synchronization signal Hsync) passes, the data driver 500 and the gate driver 400 repeat the same operation for the pixels in the next row. In this manner, the gate-on voltages V _{on are} sequentially applied to all the gate lines G ₁ -G _n during one frame to apply data voltages to all the pixels. When one frame ends, the next frame starts and the state of the inversion signal RVS applied to the data driver 500 is controlled so that the polarity of the data voltage applied to each pixel is opposite to that of the previous frame (frame inversion). . In this case, the polarity of the data voltage flowing through one data line may be changed (row inversion, dot inversion) or the polarity of the data voltage applied to one pixel row may be different depending on the characteristics of the inversion signal RVS within one frame. (Heat inversion, dot inversion).

As described above, the display device according to the present invention has a fastening structure because the first fixing member and the second fixing member are fastened while one side portion of the second fixing member covers one side portion of the first fixing member. . Therefore, the durability of the display device is improved.

Since a stepped portion is formed on each side of each of the first fixing member and the second fixing member, fastening between them is easy and the rework is simplified.

Since the step portion extends in the direction crossing the one side portion and the bending direction, the second fixing member can be fastened to the first fixing member in a sliding manner.

Since the thickness of the second side portion is larger than the thickness of the first side portion, the structure is firm and resistant to external impact.

Since the outer surface of the second side portion and the outer surface of the first side portion of one side of the first fixing member are located on the same virtual surface, there is an advantage that it is easy to receive when assembling a mobile phone.

Since the first side portion of one side portion of the second fixing member is bent toward the first fixing member side to form a stepped portion, the second fixing member is formed to cover the first fixing member, so that the fastening structure is firm.

In the first fixing member, the separation distance between the outer surfaces of the first side portion is greater than the separation distance between the outer surfaces of the second side portion, so that the first fixing member is covered with the second fixing member and the fastening is securely performed. Therefore, the durability of the display device is improved.

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.

Claims (16)

A panel unit for displaying an image, A first fixing member accommodating the panel unit, and A second fixing member fastened to the first fixing member Including, One side portion of the second fixing member covers one side portion of the first fixing member to block one side portion of the first fixing member from the outside, and one side portion of the second fixing member is formed of the first fixing member. A display device fastened and fixed to the side part. In claim 1, And a stepped portion formed on one side portion of the first fixing member and one side portion of the second fixing member. In claim 2, The second fixing member further includes a flat portion connected to one side portion of the second fixing member, and the one side portion is bent from the flat portion. In claim 3, And a step portion extending in a direction crossing the bending direction of the one side portion. In claim 3, One side portion of the second fixing member, A first side portion bent from the planar portion, and A second side portion that shares the step portion with the first side portion Display device comprising a. In claim 5, The thickness of the second side portion is greater than the thickness of the first side portion. In claim 6, The second side portion is bent and overlapping the display device. In claim 7, And an outer surface of the bent second side portion and an outer surface of the first side portion are substantially on the same virtual surface. In claim 5, The first side portion is bent toward the first fixing member side and connected to the second side portion to form the step portion. In claim 5, One side portion of the first fixing member, A first side portion corresponding to the first side portion of the second fixing member, and A second side portion corresponding to the second side portion of the second fixing member Display device comprising a. In claim 10, The first fixing member includes a pair of side surfaces facing each other, and a separation distance between outer surfaces of the second side portion of the pair of side surfaces is smaller than a separation distance between outer surfaces of the first side portion. In claim 1, The second fixing member is fixedly fixed to the first fixing member on the opposite side of the panel unit with the first fixing member interposed therebetween. In claim 1, The first fixing member is formed of a resin material. In claim 1, The second fixing member is formed of a metal material. In claim 1, And a light source for supplying light to the panel unit, wherein the panel unit is a liquid crystal display panel. In claim 1, The display device is a display device for a mobile phone.

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