KR102585477B1 - Display device - Google Patents

Abstract

The purpose of the present invention is to provide a display device with enhanced durability, including a fixed frame that covers and surrounds the outside of the display panel. The display device according to the present invention includes a fixed frame that covers and surrounds the outside of the display panel, and a filler that fills the space between the fixed frame and other components. By providing a fixing frame, the mechanical rigidity of the display panel can be strengthened. Additionally, by filling the space with a filler, the display device can effectively absorb external shocks.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device, and to a display device with enhanced durability.

A flat panel display (FPD) replaces the conventional cathode ray tube (CRT) display device, making not only desktop computer monitors, but also portable computers such as laptop computers and PDAs, and mobile phone terminals smaller and lighter. It is an essential display device to implement a system. Liquid crystal display (LCD) is a representative flat panel display device that displays images by adjusting the amount of light transmission to correspond to image signals.

1 is a diagram showing a cross section of a conventional liquid crystal display device.

As shown in FIG. 1, the conventional liquid crystal display device 10 is a light-receiving device, so it is composed of a backlight unit (BLU) that generates light and a liquid crystal panel (PL) that controls the transmission amount of the generated light. The liquid crystal panel PL includes a liquid crystal layer (not shown), a TFT array substrate 15 equipped with a thin film transistor that controls the movement of the liquid crystal, and a color filter substrate 14. Additionally, the conventional liquid crystal display device 10 includes polarizers 13 and 16 attached to both sides of the liquid crystal panel (PL), and a cover glass 11 and bottom cover 18 that modularize the liquid crystal display device 10. can do.

Here, the TFT array substrate 15 may be formed to be wider than the color filter substrate 14 in order to mount the driver 17 for driving the liquid crystal panel PL. That is, as shown in FIG. 1, the driver 17 and the color filter substrate 14 can be attached to the TFT array substrate 15 at a distance from each other.

In addition, the height (g1) of the adhesive layer 12 that attaches the cover glass 11 and the liquid crystal panel (PL) may be different due to process errors, and accordingly, the gap between the driver 17 and the cover glass 11 (g2) may also be different.

Figure 2 is a diagram showing an impact test of a conventional liquid crystal display device.

Meanwhile, in order to test the durability of the liquid crystal display device 10, impacts are applied to the liquid crystal display device 10 in various forms. One of these is to drop the liquid crystal display device 10 from a certain height to determine whether the liquid crystal display device 10 is damaged.

As shown in FIG. 2, the liquid crystal display device 10 can be dropped so that the light emitting surface faces the ground. As described above, due to the gap g2 between the driving part 17 and the cover glass 11, the driving part 17 and a part of the TFT array substrate 15 attached thereto receive force, and as a result, area A The TFT array substrate 15 is bent, and thus tensile stress is generated in area A.

Accordingly, cracks occur in area A, which makes normal connection between the driver 17 and the TFT array substrate 15 impossible, which ultimately causes problems in driving the liquid crystal panel PL. Therefore, a problem occurs in which the durability and reliability of the liquid crystal display device 10 are reduced due to the gap g2 inside the liquid crystal display device 10 described above.

The purpose of the present invention is to provide a display device with enhanced durability, including a fixed frame that covers and surrounds the outside of the display panel.

The display device according to the present invention includes a display panel, a fixing frame that covers and surrounds the display panel, and a filler that fills the space.

The fixing frame covers and surrounds the display panel while contacting one upper surface and one lower surface of the display panel.

Additionally, the filler fills the space between the fixing frame and the display panel and the space between the fixing frame and the cover glass.

By providing a fixing frame that covers and surrounds the outside of the panel, the mechanical rigidity of the display panel can be strengthened. In other words, the display panel may not be deformed despite external impact. Additionally, by filling the space between the fixing frame and other components with a filler, the display device can effectively absorb external shocks. Therefore, by additionally providing the fixing frame and the filler, the durability of the display device can be improved.

1 is a diagram showing a cross section of a conventional liquid crystal display device.
Figure 2 is a diagram showing an impact test of a conventional liquid crystal display device.
FIG. 3 is a diagram showing a display device according to an embodiment of the present invention, and FIGS. 4 to 7 are diagrams showing a cut surface along line I-I shown in FIG. 3.

Hereinafter, with reference to the attached drawings, preferred embodiments of the display device according to the present invention will be described in detail so that those skilled in the art can easily implement the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. These embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is provided. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of explanation.

When an element or layer is referred to as another element or “on” or “on” it includes not only those directly on top of another element or layer, but also all cases where there is another layer or element in between. do. On the other hand, referring to an element as “directly on” or “directly on” indicates that there is no intervening element or layer.

Spatially relative terms such as “below, beneath,” “lower,” “above,” and “upper” refer to one element or component as shown in the drawing. It can be used to easily describe the correlation with other elements or components. Spatially relative terms should be understood as terms that include different directions of the element during use or operation in addition to the direction shown in the drawings. For example, if an element shown in the drawings is turned over, an element described as “below” or “beneath” another element may be placed “above” the other element. Accordingly, the illustrative term “down” may include both downward and upward directions.

The terminology used herein is for describing embodiments and is therefore not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprise” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements. or does not rule out addition.

FIG. 3 is a diagram showing a display device according to an embodiment of the present invention, and FIGS. 4 to 7 are diagrams showing a cut surface along line I-I shown in FIG. 3.

Referring to FIG. 4, the display device 100 according to an embodiment of the present invention includes a liquid crystal panel 110 that implements an image, a backlight unit 130 that generates light provided to the liquid crystal panel 110, and the liquid crystal panel. It includes structural members 141 and 143 that modularize the panel 110 and the backlight unit 130.

The liquid crystal panel 110 is composed of a first substrate 111 and a second substrate 113 bonded at a predetermined distance apart and a liquid crystal layer (not shown) interposed between them, and a signal is applied from the driver 115. Implement the video accordingly. Thin film transistors as well as various wiring and pixel electrodes are formed on the second substrate 113, and the first substrate 111 is a color filter substrate for displaying the three primary colors RGB, and a color filter layer and a black matrix are formed.

As shown in FIG. 4, the driver 115 is formed on one side of the second substrate 113, and provides a gate driver that provides a scan signal for driving the above-described thin film transistor and a data signal to the pixel electrode. It may include a data driving unit.

To describe the liquid crystal panel 110 in more detail, a plurality of gate lines arranged vertically and horizontally to define a plurality of pixel areas and data lines orthogonal to them are formed on the second substrate 113, each of which A thin film transistor, a switching element, is formed in the pixel area. In addition, a thin film transistor includes a gate electrode connected to a gate line, a semiconductor layer formed by stacking amorphous silicon, etc. on top of the gate electrode, and a source electrode and drain electrode formed on the semiconductor layer and electrically connected to the data line and the pixel electrode. It consists of

The first substrate 111 is a color filter composed of a plurality of sub-color filters that implement the colors of red, green, and blue. The first substrate 111 distinguishes each sub-color filter and transmits light that passes through the liquid crystal layer. It consists of a black matrix that blocks.

The first and second substrates 111 and 113 configured in this way are bonded to face each other by a sealant formed on the outside of the image display area to form the liquid crystal panel 110, and the liquid crystal panel 110 described above is also formed. A first polarizer 105 and a second polarizer 107 are attached, respectively, to polarize the light incident and output from the liquid crystal panel 110 to create an image.

The cover glass 101 is disposed on the liquid crystal panel 110, and light emitted through the cover glass 101 is transmitted, thereby creating an image. Additionally, the cover glass 101 serves to protect the liquid crystal panel 110 from external shock.

The fixing frame 120 is formed to cover and surround the liquid crystal panel 110 and serves to strengthen the mechanical rigidity of the liquid crystal panel 110. That is, the fixing frame 120 is attached to the outer surface of the liquid crystal panel 110 to protect the liquid crystal panel 110.

Hereinafter, the direction in which the cover glass 101 is disposed is defined as upward, and the direction in which the bottom cover 143 is disposed is defined as downward, based on the illustrated x-axis.

The fixing frame 120 must be attached to the outer surface of the liquid crystal panel 110 to protect the liquid crystal panel 110 from external shock. Therefore, as shown in FIG. 4, the fixing frame 120 contacts the upper surface of one side of the first substrate 111 of the liquid crystal panel 110, and at the same time, the second substrate 113 of the liquid crystal panel 110 ) may be formed to cover and surround the liquid crystal panel 110 while contacting the lower surface of one side.

That is, the x-axis gap g3 between the fixed frame 120 and the upper surface of the first substrate 111 can be eliminated, and the The axis gap (g4) may disappear. Additionally, when the fixing frame 120 is in contact with the upper surface of one side of the first substrate 111, a contact agent (not shown) can be used to fix the horizontal position of the fixing frame 120. That is, a contact agent may be inserted into the x-axis gap g3 between the fixing frame 120 and the top surface of the first substrate 111. Also, similarly, when the fixing frame 120 is in contact with one lower surface of the second substrate 113, a contact agent can be used to fix the horizontal position of the fixing frame 120. That is, a contact agent can be inserted into the By making contact, the fixing frame 120 can support the liquid crystal panel 110 without being separated in the horizontal direction.

And, as described above, if a part of the fixed frame 120 is in contact with the first substrate 111 and the second substrate 113, the remaining part of the fixed frame 120 that is not in contact is connected to the liquid crystal panel 110. covered and wrapped. At this time, the remaining part of the fixed frame 120 may be formed in various shapes within the empty space of the display device 100.

More specifically, as shown in FIG. 4 , the second substrate 113 may be formed to be wider than the first substrate 111 . That is, the second substrate 113 may be formed to be longer on one side than the first substrate 111, and the driver 115 may be formed on one side of the second substrate 113 that does not overlap the first substrate 111. can be formed. In other words, the first substrate 111 and the driver 115 may be placed on the second substrate 113 to be spaced apart. Here, the driver 115 may be formed lower than the first substrate 111. Therefore, the part of the fixed frame 120 that is not in contact with the first substrate 111 and the second substrate 113 may be formed to be spaced apart from the driving unit 115 and cover it, and the part of the fixed frame 120 can be formed in various forms.

Hereinafter, with reference to FIGS. 4 to 7, various shapes and arrangement relationships of the fixed frame will be described.

As shown in FIG. 4, the fixed frame 120 is formed so that the portion in contact with the upper surface of the first substrate 111 extends parallel to the y-axis, and the portion in contact with the lower surface of the second substrate 113 is y-axis. It may be a 'ㄷ' shape that is formed parallel to the axis and the remaining part is formed parallel to the x-axis.

Additionally, in order to prevent the fixing frame 120 from shaking, the fixing frame 120 can be placed in contact with the PCB 135 disposed on one lower side of the liquid crystal panel 110, which will be described later. That is, as shown in FIG. 4, the PCB 135, the lower part of the fixed frame 120, and the second substrate 113 can be sequentially stacked and disposed without any spacing. By placing the fixing frame 120 between the second substrate 113 and the PCB 135 in this way, the fixing frame 120 can effectively protect the liquid crystal panel 110 without shaking.

Here, the fixed frame 120 may be made of a material with a thickness (T) of at least 0.1 mm and an elastic modulus of 200 GPa or more. Here, any material with an elastic modulus of 200 GPa, such as polymer or metal, can be used as a material for the fixed frame 120. However, in general, considering the weight reduction of the display device 100, the fixed frame 120 can be formed of stainless steel. By setting the minimum thickness and minimum elastic coefficient of the fixing frame 120 in this way, the fixing frame 120 can be equipped with mechanical rigidity capable of protecting the liquid crystal panel 110 from external shock.

As shown in FIG. 5, another type of fixed frame 120a may be formed in a stepped shape. In the 'ㄷ' structure shown in FIG. 4, the first substrate 111 and the driving unit 115 may be disposed at a certain interval. Accordingly, a different type of fixed frame 120a can be formed to eliminate the gap between the upper surface of the driving unit 115 and the fixed frame 120.

More specifically, the other type of fixed frame 120a is formed by attaching the upper surface of the first substrate 111 and the lower surface of the second substrate 113 in the y-axis direction, and is also attached to the upper surface of the driving unit 115. It can be formed by being attached in the y-axis direction. That is, another type of fixed frame 120a can be formed so that the gap g5 between the upper surface of the driving unit 115 and the other type of fixed frame 120a is eliminated. Here, a portion of another type of fixed frame 120a in which a step occurs may be connected in the x-axis direction. The so-called other type of fixed frame 120a may be formed in a stepped shape.

Here, the other fixed frame 120a may be made of a material with a thickness (T) of at least 0.1 mm and an elastic modulus of 200 GPa or more. Here, if the material has an elastic modulus of 200 GPa, polymers, metals, etc. can all be used as materials for other types of fixed frames (120a). However, considering the weight reduction of the display device 100, stainless steel is generally used as a material for other types of fixed frames (120a). can be formed. By setting the minimum thickness and minimum elastic coefficient of the different types of fixed frames 120a, the different types of fixed frames 120a can be equipped with mechanical rigidity to protect the liquid crystal panel 110 from external shock. .

In this way, the gap between the different type of fixed frame 120a and the driving unit 115 is eliminated so that the different type of fixed frame 120a is brought into closer contact with the liquid crystal panel 110. By attaching a different type of fixing frame 120a to the outside of the liquid crystal panel 110 in this way, the components of the liquid crystal panel 110 are fixed so as not to shake inside the different type of fixing frame 120a. Because of this, the liquid crystal panel 110 can be effectively protected by another type of fixing frame 120a.

As shown in FIG. 6, fillers 121 and 122 that cushion external impacts may be further included around the 'L' shaped fixed frame 120.

In the 'ㄷ' structure, there is a height difference between the first substrate 111 and the driving unit 115, so the driving unit 115 and the fixed frame 120 can be arranged to be spaced apart by the C area. Additionally, the fixing frame 120 and the cover glass 101 may be arranged to be spaced apart by area B due to processing errors in the adhesive layer 103 that attaches the cover glass 101. Therefore, the plurality of spaced spaces can be filled with a plurality of fillers 121 and 122.

More specifically, the first filler 121 may be filled in the space between the cover glass 101 and the fixed frame 120 as much as area B. In Figure 6, filling the first filler 121 in a rectangular shape is described, but it is not limited to this and can be formed in various shapes.

In addition, the space between the fixed frame 120, the second substrate 113, and the driving unit 115 as much as area C may be filled with the second filler 122. In Figure 6, filling the second filler 122 in a rectangular shape on the upper surface of the driving unit 115 is disclosed, but the material is not limited to this, and the filling between the second substrate 113 and the driving unit 115 and the fixed frame 120 is not limited to this. It can be configured in various forms to suit the space.

The first filler 121 and the second filler 122 are formed of a polymer material such as cushion acryl material or PET (polyethylene terephthalate) material with excellent shock absorption, or other materials with good shock absorption and elasticity. It may be used by selecting a material including rubber, for example.

As shown in FIG. 7, another type of fixed frame 120b may be formed by being attached to the cover glass 101. More specifically, the another type of fixing frame 120b is formed by attaching the upper surface of the first substrate 111 and the lower surface of the second substrate 113 in the y-axis direction, and at the same time, the lower surface of the cover glass 101. It can also be formed by attaching it in the y-axis direction. That is, the gap g6 between the lower surface of the cover glass 101 and another type of fixed frame 120b can be eliminated. Here, a portion of another type of fixed frame 120b in which a step occurs may be formed in the x-axis direction.

Here, the another type of fixed frame 120b may be made of a material with a thickness (T) of at least 0.1 mm and an elastic modulus of 200 GPa or more. Here, if it corresponds to a material with an elastic modulus of 200 GPa, polymers, metals, etc. can all be used as materials for another type of fixing frame 120b, but in general, considering the weight reduction of the display device 100, stainless steel is used for another type of fixation. A frame 120b can be formed. By setting the minimum thickness and minimum elastic coefficient of another type of fixing frame 120b, another type of fixing frame 120b can be equipped with mechanical rigidity to protect the liquid crystal panel 110 from external shock. You can.

In addition, the other type of fixing frame 120b and the cover glass 101 may be arranged to be spaced apart by a certain space by area D due to processing errors in the adhesive layer 102 that attaches the cover glass 101. Therefore, the space equivalent to the area D can be filled with the third filler 123. In Figure 7, filling the third filler 123 in a rectangular shape is disclosed, but it is not limited to this and can be formed in various shapes.

The third filler 123 is formed of a polymer material such as cushion acryl material or PET (polyethylene terephthalate) material with excellent shock absorption, or other material with good shock absorption and elasticity, such as rubber. You can also select and use materials including materials.

By attaching another type of fixing frame 120b to the cover glass 101, the cover glass 101 is prevented from shaking due to external impact. In addition, by filling the upper third filler 123 inside another type of fixing frame 120b, the liquid crystal panel 110, which may be shaken due to external shock, is fixed and external shock is absorbed, thereby improving the liquid crystal panel more effectively. (110) can be protected.

The backlight unit 130 includes an LED package 137, a PCB 135, and a plurality of optical members 131, 133, and 139 that convert the generated light.

As shown in FIG. 4, the optical members 131, 133, and 139 include an optical sheet 131, a light guide plate 133, and a reflector 139, and are arranged to face the light emitting surface of the LED package 137. It serves to provide light to the above-described liquid crystal panel 110.

The light guide plate 133 is disposed below the liquid crystal panel 110 and serves to guide light emitted by the LED package 137 from one or more sides and supply it to the liquid crystal panel 110. This light guide plate 133 allows light incident on one side to repeatedly reflect and refract on the upper and lower surfaces of the light guide plate 133, propagate to the other side, and then exit upward. A diffusion agent is used to help the light progress. may be included. Additionally, the light guide plate 133 may be formed in a rectangular parallelepiped shape with different thicknesses at both ends, and a predetermined pattern or groove may be formed on the lower surface to scatter incident light.

The optical sheet 131 is provided between the liquid crystal panel 110 and the light guide plate 133 and serves to diffuse and concentrate the light supplied to the liquid crystal panel 110 through the light guide plate 133, and includes one or more diffusion sheets and It may be made of a prism sheet.

The diffusion sheet serves to diffuse the light emitted from the light guide plate 133, and the prism sheet serves to supply uniform light to the liquid crystal panel 110 by concentrating the light diffused by the diffusion sheet. Here, one diffusion sheet is usually provided, but the prism sheet is provided with a first prism sheet and a second prism sheet where the prisms perpendicularly intersect in the x and y axes directions to refract light in the x and y axes directions. It is desirable to configure it to improve straight driving ability.

The reflector 139 is provided at the lower part of the light guide plate 133 and serves to reflect light that is refracted by the light guide plate 133 and emitted in the lower direction, that is, in the direction opposite to the liquid crystal panel 110, and then travel back to the light guide plate 133. do.

The bottom cover 143 is disposed at the bottom of the liquid crystal display device 100 and is configured to cover the side portion of the liquid crystal display device 110, so that all components of the liquid crystal display device 100 are mounted. The bottom cover 143 is made of plastic or metal material with excellent surface strength to protect the liquid crystal display device 100 from external shock.

As described above, the mechanical rigidity of the liquid crystal panel can be strengthened by providing a fixing frame that covers and surrounds the outside of the liquid crystal panel. In other words, the liquid crystal panel may not be deformed despite external impact. Additionally, by filling the space between the fixed frame and other components with filler, external shock can be effectively absorbed. Therefore, by providing the fixing frame and the filler, the durability of the display device can be improved.

As described above, the display device is explained using the liquid crystal display device 100 as an example, but it is not limited to this and can be applied to various display devices such as an organic light emitting display device and a plasma display device. For example, in the case of an organic light emitting display device, the backlight unit 130 may be removed and formed of a substrate with an organic layer instead of the liquid crystal panel 110. That is, instead of the liquid crystal panel 110, an organic light emitting diode consisting of an organic layer and an electrode surrounding the organic layer and emitting light may be disposed on the thin film transistor formed on the second substrate 113.

Although many details are described in detail in the foregoing description, this should be interpreted as an example of a preferred embodiment rather than limiting the scope of the invention. Therefore, the invention should not be determined by the described embodiments, but by the scope of the patent claims and their equivalents.

Claims (8)

A display including a first substrate, a second substrate disposed below the first substrate and extending to one side beyond the first substrate, and a driver disposed parallel to the first substrate on the upper surface of the second substrate. panel;
a fixing frame that covers and surrounds the display panel while contacting the upper surface of the first substrate and the lower surface of the second substrate; and
a cover glass disposed on the display panel; Including,
A first filler is disposed in the space between the cover glass and the fixing frame,
A second filler is disposed in the space between the fixed frame and the driving unit,
A display device wherein the first filler and the second filler are arranged to overlap each other in a vertical direction. delete delete delete delete According to claim 1,
Further comprising a PCB disposed below one side of the display panel,
The fixing frame is a display device that covers and surrounds the display panel while contacting the PCB. According to claim 1,
A display device in which the first substrate and the fixed frame are in contact with each other through an adhesive that fixes the horizontal position of the fixed frame. According to claim 1,
The fixed frame is a display device in the shape of 'ㄷ'.