KR20230103381A - Frame member and Liquid crystal display module using the same - Google Patents

Abstract

The present invention is to prevent defects in a liquid crystal display module by minimizing deformation of a frame member. The frame member of the present invention has a rectangular frame structure corresponding to the shape of a liquid crystal display panel, and each side of the rectangular frame is made of metal. It consists of a body made of and an insert injection molding product inserted into one side of the body, and a stopper is formed on one side of the body into which the insert injection molding product is inserted to reduce the difference in expansion rate and contraction rate between the body and the insert injection molding product.

Description

Frame member and liquid crystal display module using the same {Frame member and Liquid crystal display module using the same}

The present invention relates to a frame member and a liquid crystal module using the same.

Liquid crystal display devices are used in portable computers such as notebook PCs, office automation devices, audio/video devices, indoor and outdoor advertising display devices, and the like. A liquid crystal display device displays an image by modulating light incident from a back light unit (BLU) by controlling an electric field applied to a liquid crystal layer of a liquid crystal display panel.

The liquid crystal display panel and the backlight unit are assembled together with case members fixing them to be implemented as a liquid crystal module (LCM).

Recently, research is being conducted to simplify the case member.

An object of the present invention is to prevent defects in a liquid crystal display module by minimizing deformation of a frame member.

A frame member according to an embodiment of the present invention for achieving the above object has a rectangular frame structure corresponding to the shape of a liquid crystal display panel, and each side of the rectangular frame has a body made of metal and one side of the body. It is composed of an insert injection molding product to be inserted, and a stopper is formed on one side of the body into which the insert injection molding product is fitted to reduce a difference in expansion rate and contraction rate between the body and the insert injection molding product.

The body includes a flat surface having a length in the side direction and a predetermined width, a bent surface having a gentle curve extending inward from the flat surface, and one side of the flat surface on the opposite side of the bent surface so that the insert injection molding product is fitted thereto. It has a fitting protrusion formed along the longitudinal direction, and the stopper may be formed on the fitting protrusion of the body.

The body includes a pedestal bent at one side of the bent surface and supported by the bottom cover, a fitting groove formed along the longitudinal direction on the back surface of the fitting protrusion, and a rear surface of the flat surface to receive the side wall of the bottom cover. Support protrusions formed along the longitudinal direction may be further provided.

The stopper may include a groove or a through hole.

A liquid crystal display module according to an embodiment of the present invention for achieving the above object includes a board assembly in which a liquid crystal display panel is assembled, a frame member supporting and fixing the board assembly, and a predetermined space with the frame member. A cover bottom coupled to the frame member, wherein the frame member has a rectangular frame structure corresponding to the shape of the board assembly, and each side of the rectangular frame is inserted into a body made of metal and one side of the body. It is composed of an insert injection molding product, and a stopper is formed on one side of the body into which the insert injection molding product is fitted to reduce a difference in expansion rate and contraction rate between the body and the insert injection molding product.

The frame member and the liquid crystal display module according to the embodiment of the present invention having the above characteristics have the following effects.

A stopper is formed on the body of the frame member to fix the body of the frame member and the injection-molded product to each other by filling the stopper with the material of the insert injection-molded product when forming the injection-molded product.

Therefore, since the difference in expansion rate and contraction rate between the body of the frame member and the insert injection molding product is reduced, deformation of the shape of the frame member can be prevented, and defects in the liquid crystal display module can also be prevented.

1 is a configuration diagram of a liquid crystal display device according to embodiments of the present invention;
2 is an exploded perspective view of a liquid crystal display module according to an embodiment of the present invention;
3 is a three-dimensional perspective view of a frame member 30 according to the present invention
4 is an enlarged three-dimensional perspective view of part A of FIG. 3
Figure 5 is a partial plan view of the body of the frame member according to an embodiment of the present invention
6 is a cross-sectional perspective view of an assembled structure of a liquid crystal display module according to an embodiment of the present invention;

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative, so the present invention is not limited to the details shown. Like reference numbers designate like elements throughout the specification. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

When 'includes', 'has', 'consists of', etc. mentioned in the specification of the present invention is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal precedence relationship is described in terms of 'after', 'following', 'next to', 'before', etc. It can also include non-continuous cases unless is used.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below may also be the second component within the technical spirit of the present invention.

"X-axis direction", "Y-axis direction", and "Z-axis direction" should not be interpreted only as a geometric relationship in which the relationship between each other is made upright, and may be broader within the range in which the configuration of the present invention can function functionally. It can mean having a direction.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, "at least one of the first item, the second item, and the third item" means not only the first item, the second item, or the third item, respectively, but also two of the first item, the second item, and the third item. It may mean a combination of all items that can be presented from one or more.

Each feature of the various embodiments of the present invention can be partially or entirely combined or combined with each other, technically various interlocking and driving are possible, and each embodiment can be implemented independently of each other or can be implemented together in a related relationship. may be

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

1 is a structural diagram illustrating a liquid crystal display device according to embodiments of the present invention.

Referring to FIG. 1 , the liquid crystal display device 10 includes a liquid crystal display module 100 including an active area A/A and a non-active area N/A, and the liquid crystal display module 100 is driven. It may include a gate driving circuit 120, a data driving circuit 130, a controller 140, and the like to do so.

In the liquid crystal display module 100, a plurality of gate lines GL and a plurality of data lines DL are disposed, and a subpixel SP is disposed in an area where the gate lines GL and data lines DL intersect. A liquid crystal panel may be provided.

The liquid crystal display panel may include a pixel electrode, a common electrode, and a liquid crystal layer disposed between the pixel electrode and the common electrode, and the liquid crystal layer blocks light by changing molecular arrangement in response to a voltage applied to the pixel electrode and the common electrode. Alternatively, an image may be displayed by being transmitted.

The liquid crystal display module 100 may include a backlight unit for irradiating uniform light to the liquid crystal display panel.

The backlight unit is divided into a direct type and an edge type. The edge type backlight unit has a structure in which a light source is disposed to face a side surface of the light guide plate and a plurality of optical sheets are disposed between the liquid crystal display panel and the light guide plate. In the edge-type backlight unit, a light source radiates light to one side of a light guide plate of a liquid crystal display panel, and the light guide plate converts a line light source or a point light source into a surface light source and radiates light to the liquid crystal display panel.

The direct backlight unit has a structure in which a plurality of light sources are disposed under the liquid crystal display panel, and irradiates light diffused through a diffusion plate to the liquid crystal display panel. The direct type backlight unit does not require a light guide plate.

A direct type backlight unit may be applied to the liquid crystal display of the present invention.

The gate driving circuit 120 is controlled by the controller 140 and sequentially outputs scan signals to the plurality of gate lines GL disposed in the liquid crystal display module 100 to drive the plurality of subpixels SP. You can control the timing.

The gate driving circuit 120 may include one or more gate driver integrated circuits (GDICs), and may be located on only one side of the liquid crystal display module 100 or located on both sides depending on the driving method. You may. Each gate driver integrated circuit (GDIC) is connected to the bonding pad of the liquid crystal display module 100 by a tape automated bonding (TAB) method or a chip on glass (COG) method, or a gate (GIP) It may be implemented as an in-panel type and placed directly within the liquid crystal display panel of the liquid crystal display module 100. In some cases, the thin film transistor and capacitor constituting the sub-pixels of the active area of the liquid crystal display panel are simultaneously manufactured. can be formed In addition, each gate driver integrated circuit (GDIC) may be implemented in a Chip On Film (COF) method mounted on a film connected to the liquid crystal display module 100 .

The data driving circuit 130 may receive image data from the controller 140 and convert the image data into an analog data voltage. The data driving circuit 130 outputs a data voltage to each data line DL according to the timing at which the scan signal is applied through the gate line GL so that each sub-pixel SP expresses the brightness according to the image data. can The data driving circuit 130 may include one or more Source Driver Integrated Circuits (SDICs). Each source driver integrated circuit (SDIC) may include a shift register, a latch circuit, a digital-to-analog converter, and an output buffer. However, it is not limited thereto.

Each source driver integrated circuit (SDIC) may be connected to bonding pads of the liquid crystal display module 100 through a tape automated bonding (TAB) method or a chip on glass (COG) method, or directly disposed on the display panel 100. In some cases, it may be integrated and disposed on the liquid crystal display panel. In addition, each source driver integrated circuit (SDIC) may be implemented in a chip on film (COF) method. In this case, each source driver integrated circuit (SDIC) is mounted on a film connected to the liquid crystal display module 100. and can be electrically connected to the display panel 100 through wires on the film.

The controller 140 may supply various control signals to the gate driving circuit 120 and the data driving circuit 130 and control operations of the gate driving circuit 120 and the data driving circuit 130 . The controller 140 may be mounted on a printed circuit board or a flexible printed circuit and electrically connected to the gate driving circuit 120 and the data driving circuit 130 through the printed circuit board or the flexible printed circuit.

The controller 140 causes the gate driving circuit 120 to output a scan signal according to the timing implemented in each frame, and converts image data received from the outside to suit the data signal format used by the data driving circuit 130. The converted image data may be output to the data driving circuit 130 .

The controller 140 transmits various timing signals including a vertical sync signal (VSYNC), a horizontal sync signal (HSYNC), an input data enable signal (DE, Data Enable), and a clock signal (CLK) together with video data to an external ( eg host system).

The controller 140 may generate various control signals using various timing signals received from the outside and output them to the gate driving circuit 120 and the data driving circuit 130 .

For example, the controller 140 controls the gate driving circuit 120 by using a gate start pulse (GSP), a gate shift clock (GSC), and a gate output enable signal (GOE). It can output various gate control signals (GCS) including Gate Output Enable) and the like.

Here, the gate start pulse GSP may control the operation start timing of one or more gate driver integrated circuits (GDIC) constituting the gate driving circuit 120 . The gate shift clock (GSC) is a clock signal commonly input to one or more gate driver integrated circuits (GDIC), and can control the shift timing of the scan signal. The gate output enable signal GOE may designate timing information of one or more gate driver integrated circuits (GDIC).

In addition, the controller 140 controls the data driving circuit 130 by using a source start pulse (SSP), a source sampling clock (SSC), and a source output enable signal (SOE). Enable) and the like can be output. Here, the source start pulse SSP may control data sampling start timing of one or more source driver integrated circuits SDIC constituting the data driving circuit 130 . The source sampling clock SSC may be a clock signal that controls sampling timing of data in each source driver integrated circuit SDIC. The source output enable signal SOE may control output timing of the data driving circuit 130 .

The liquid crystal display device further includes a power management integrated circuit that supplies various voltages or currents to the liquid crystal display module 100, the gate driving circuit 120, the data driving circuit 130, or controls various voltages or currents to be supplied. can do.

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

As shown in FIG. 2, the liquid crystal display module 100 according to the present invention uniformly diffuses the light emitted from the board assembly 10 to which the liquid crystal display panel is assembled and the direct type LED array to the liquid crystal display panel. The optical sheet 20, the frame member 30 supporting and fixing the board assembly 10 and the optical sheet 20, and a cover having a certain space with the frame member 30 and coupled to the frame member 30. It is composed of a bottom 60, a reflector 50 disposed on the bottom surface of the cover bottom 60, and an LED array 40 for emitting light and irradiating the liquid crystal display panel of the board assembly 10. .

Here, the reflector 50 reflects light emitted from the LED array 40 toward the liquid crystal display panel.

The cover bottom 60 has a side wall, and the side wall of the cover bottom 60 is coupled to a support protrusion formed on the frame member 30 .

The board assembly 10, the optical sheet 20 and the frame member 30 are fixed by an adhesive.

A detailed configuration of the frame member 30 will be described.

3 is a three-dimensional perspective view of the frame member 30 according to the present invention, and FIG. 4 is an enlarged three-dimensional perspective view of part A of FIG.

As shown in FIG. 3 , the frame member 30 according to the present invention has a rectangular frame structure corresponding to the shape of the board assembly 10 to which the liquid crystal display panel is assembled.

The frame member 30 is composed of a body 70 made of metal and an insert injection molding 80 made of a resin material inserted into one side of the body 70 to support the board assembly 10 and the optical sheet 20 .

The body 70 and the insert injection molding 80 extend along all sides of the frame member 30 and are coupled to each other to form a rectangular frame structure.

The body 70 includes a flat surface 32 having a length in the side direction of the frame member 30 and having a certain width, a bent surface 31 having a gentle curve extending inward from the flat surface 32, and an insert. A fitting protrusion 36 formed along the longitudinal direction of the flat surface 32 may be provided on one side of the flat surface 32 on the opposite side of the bent surface 31 so that the injection molding material 80 is inserted.

The body 70 is bent on one side of the bent surface 31, and the pedestal 34 supported on the bottom surface of the cover bottom 60, and the fitting groove 37 formed along the longitudinal direction on the rear surface of the fitting protrusion 36 can be further provided.

The body 70 may further include a support protrusion 35 formed along the longitudinal direction on the rear surface of the flat surface 32 to receive the sidewall of the bottom cover 60 . The side surface of the bottom cover 60 and the support protrusion 35 are fixed to each other by screws.

The body 70 may be made of an aluminum (AL) material.

By injecting a resin material such as plastic into the fitting protrusion 36 of the body 70 configured as described above, the insert injection molding 80 is made to fit into the fitting protrusion 36 and the fitting groove 37 of the body 70. form

However, since the body 70 is made of aluminum and the insert product 80 is made of plastic or the like, the body 70 and the insert product 80 have different expansion rates according to temperature.

That is, at low temperatures, plastic contracts more than aluminum, and at high temperatures, plastic expands more than aluminum.

Therefore, the shape of the frame member 30 is deformed due to the difference in expansion rate between the body 70 and the insert injection molding 80, and thus defects may occur in the liquid crystal display module.

In order to solve the above problems, the present invention may form a plurality of stoppers on the fitting protrusion 36 of the body 70.

5 is a partial plan view of the body 70 of the frame member 30 according to an embodiment of the present invention.

In the body 70 of the frame member 30 according to the embodiment of the present invention, as shown in FIG. 5, a plurality of stoppers 38 are formed at regular intervals. Specifically, a plurality of stoppers 38 are formed at regular intervals on the fitting protrusions 36 of the body 70 .

The stopper 38 may be a groove or a through hole.

When forming the insert injection molding 80 to be inserted into the fitting protrusion 36 of the body 70 by injecting a resin material such as plastic into the fitting protrusion 36 of the body 70 configured as described above, the groove or Since the insert injection molding 80 is filled in the stopper 38 formed of a through hole or the like, the body 70 and the insert injection molding 80 are fixed to each other by the stopper 38 .

Therefore, since the difference in expansion rate and contraction rate between the body 70 of the frame member 30 and the insert injection molding 80 is reduced, deformation of the shape of the frame member can be prevented, and defects in the liquid crystal display module can be prevented.

6 is a cross-sectional perspective view of an assembled structure of a liquid crystal display module according to an embodiment of the present invention.

The board assembly 10 and the optical sheet 20 are fixed to the insert injection molding 80 of the frame member 30 by an adhesive.

A reflector 50 is disposed on the bottom surface 62 of the cover bottom 60, and an LED array 40 is disposed on the reflector 50 to radiate light to the liquid crystal display panel of the board assembly 10.

The pedestal 34 of the frame member 30 is supported by the bottom surface 62 of the bottom cover 60 . The pedestal 34 of the frame member 30 may contact the reflector 50 disposed on the bottom surface 62 of the bottom cover 60 .

The sidewall 61 of the cover bottom 60 is supported to the inside of the support protrusion 35 of the frame member 30, and the sidewall 61 of the cover bottom 60 and the frame member 30 are connected by screws 39. The support protrusion 35 of is fixed.

Through the above description, those skilled in the art will understand that various changes and modifications are possible without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be limited by the claims.

10: board assembly 20: optical sheet
30; Frame member 31: bending surface
32: flat surface, 34: pedestal
35: support projection 36: fitting projection
37: fitting groove 38: stopper
39: screw 40: LED array
50: vincipin 60: cover bottom
70: body 80: injection molding
100: liquid crystal display module 120: gate driving circuit
130: data driving circuit 140: timing controller

Claims (9)

It has a rectangular frame structure corresponding to the shape of the liquid crystal display panel,
Each side of the rectangular frame,
a body made of metal;
Consisting of an insert injection molding inserted into one side of the body,
A frame member having a stopper formed on one side of the body into which the insert injection molding product is inserted to reduce a difference in expansion rate and contraction rate between the body and the insert injection molding product. According to claim 1,
the body,
A flat surface having a length in the side direction and a predetermined width;
A bent surface having a gentle curve extending from the flat surface to the inside;
A fitting protrusion formed along the longitudinal direction on one side of the flat surface on the opposite side of the bent surface to fit the insert injection molding,
The stopper is a frame member formed on a fitting protrusion of the body. According to claim 2,
the body,
A pedestal bent at one side of the bent surface and supported by the bottom cover;
A fitting groove formed along the longitudinal direction on the back surface of the fitting protrusion;
A frame member further comprising a support protrusion formed along a longitudinal direction on a rear surface of the flat surface to receive the side wall of the bottom cover. According to claim 1,
The stopper is a frame member including a groove or a through hole. a board assembly in which a liquid crystal display panel is assembled;
a frame member supporting and fixing the board assembly;
A cover bottom having a predetermined space with the frame member and coupled to the frame member,
The frame member,
Has a rectangular frame structure corresponding to the shape of the board assembly,
Each side of the rectangular frame is composed of a body made of metal and an insert injection molding product inserted into one side of the body,
A liquid crystal display module having a stopper formed on one side of the body into which the insert injection-molded product is inserted to reduce a difference in expansion rate and contraction rate between the body and the insert injection-molded product. According to claim 5,
the body,
A flat surface having a length in the side direction and a predetermined width;
A bent surface having a gentle curve extending from the flat surface to the inside;
A fitting protrusion formed along a longitudinal direction on one side of a flat surface on the opposite side of the bent surface to fit the insert injection molding,
The liquid crystal display module of claim 1, wherein the stopper is formed on a fitting protrusion of the body. According to claim 6,
the body,
A pedestal bent at one side of the bent surface and supported by the bottom cover;
A fitting groove formed along the longitudinal direction on the back surface of the fitting protrusion;
and a support protrusion formed along a longitudinal direction on a rear surface of the flat surface to receive the sidewall of the bottom cover. According to claim 5,
The liquid crystal display module of claim 1, wherein the stopper includes a groove or a through hole. According to claim 5,
A reflector disposed on the bottom surface of the cover bottom;
an LED array disposed on a bottom surface of the cover bottom to radiate light to the liquid crystal display panel of the board assembly;
and an optical sheet disposed between the board assembly and the frame member to uniformly diffuse the light emitted from the LED array to the liquid crystal display panel.

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