KR20110051106A - Liquid clystal display device - Google Patents

Liquid clystal display device Download PDF

Info

Publication number
KR20110051106A
KR20110051106A KR1020090107777A KR20090107777A KR20110051106A KR 20110051106 A KR20110051106 A KR 20110051106A KR 1020090107777 A KR1020090107777 A KR 1020090107777A KR 20090107777 A KR20090107777 A KR 20090107777A KR 20110051106 A KR20110051106 A KR 20110051106A
Authority
KR
South Korea
Prior art keywords
liquid crystal
crystal display
display panel
heat dissipation
cof
Prior art date
Application number
KR1020090107777A
Other languages
Korean (ko)
Inventor
박순규
이창균
Original Assignee
엘지디스플레이 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지디스플레이 주식회사 filed Critical 엘지디스플레이 주식회사
Priority to KR1020090107777A priority Critical patent/KR20110051106A/en
Publication of KR20110051106A publication Critical patent/KR20110051106A/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection
    • G09G2330/045—Protection against panel overheating

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The present invention discloses a liquid crystal display device excellent in heat dissipation.

The disclosed liquid crystal display device includes a liquid crystal display panel formed by crossing a plurality of gate lines and a plurality of data lines, a driving PCB disposed at an edge of the liquid crystal display panel to supply driving signals to gates and data lines, and a liquid crystal display. A plurality of chip on film (COF) for electrically connecting the panel and the driving PCB, a driver IC mounted on one surface of the plurality of COF, and a heat dissipation member disposed on the other surface of the plurality of COF to absorb heat generated from the driver IC Characterized in that it comprises a.

Description

Liquid crystal display device {LIQUID CLYSTAL DISPLAY DEVICE}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device excellent in heat dissipation.

In general, liquid crystal displays (LCDs) have tended to be gradually widened due to their light weight, thinness, and low power consumption. In accordance with this trend, liquid crystal displays are used in office automation equipment, audio / video equipment, and the like. The liquid crystal display device displays a desired image on a screen by adjusting a transmission amount according to image signals applied to a plurality of control switches arranged in a matrix form.

Since the liquid crystal display device is not a self-luminous display device, a backlight unit is provided to provide light to the rear surface of the liquid crystal display panel on which an image is displayed.

The backlight unit has two types, a direct method and an edge method, depending on the position of the light source.

In the edge method, a light source is disposed on a side of a flat plate, and the light emitted from the light source is irradiated to the entire surface of the liquid crystal display panel using a light guide plate. On the other hand, in the direct method, a plurality of light sources are disposed on the back of the liquid crystal display panel to directly irradiate light directly under the liquid crystal display panel, so that the luminance can be increased by a plurality of light sources compared to the edge method, and the light emitting surface is wider. There is an advantage to this.

As the size of the liquid crystal display device increases, the size of the backlight unit also increases. As a result, the liquid crystal display device employs a backlight unit of a direct type.

In the backlight unit included in the general direct-type liquid crystal display device, a plurality of light sources are disposed on the rear surface of the liquid crystal display panel at regular intervals, and diffusion plates and optical sheets for diffusing and condensing light are disposed on the plurality of light sources. Made of structure.

In recent years, as a liquid crystal display device is gradually enlarged, a direct type backlight unit is mainly used.

The liquid crystal display panel defines a plurality of pixels by crossing a plurality of gate lines and data lines.

A general liquid crystal display device includes a driving PCB for driving a gate line and a data line of the liquid crystal display panel, and the driving PCB is a gate line and a data line of the liquid crystal display panel by a chip on film (COF) in which a driver IC is mounted. Is electrically connected to the

In general, a liquid crystal display generates heat from a driver IC during driving, and heat generated from the driver IC causes a problem of malfunction of the driver IC while driving of the liquid crystal display continues.

It is an object of the present invention to provide a liquid crystal display device excellent in heat dissipation.

Liquid crystal display device according to an embodiment of the present invention,

A liquid crystal display panel formed by crossing a plurality of gate lines and a plurality of data lines;

A driving PCB disposed at an edge of the liquid crystal display panel to supply a driving signal to the gate and the data line; A plurality of chip on film (COF) for electrically connecting the liquid crystal display panel and the driving PCB; A driver IC mounted on one surface of the plurality of COFs; And a heat dissipation member disposed on other surfaces of the plurality of COFs to absorb heat generated from the driver IC.

In addition, the liquid crystal display device according to another embodiment of the present invention,

A liquid crystal display panel formed by crossing a plurality of gate lines and a plurality of data lines; A driving PCB disposed at an edge of the liquid crystal display panel to supply a driving signal to the gate and the data line; And a plurality of chip on films (COFs) for electrically connecting the liquid crystal display panel and the driving PCB, wherein the plurality of COFs have a heat dissipation layer absorbing a temperature of a driver IC.

According to the present invention, the heat dissipation member that absorbs heat of the driver IC mounted on one surface of the COF is disposed on the other surface of the COF, thereby preventing damage to the driver IC due to heat.

In addition, the COF of the present invention has a heat radiation effect of 25 degrees or more by the heat radiation member.

According to another exemplary embodiment of the present invention, a liquid crystal display (COF) including a heat dissipation layer is provided so that the heat dissipation layer absorbs heat generated from the driver IC to prevent damage to the driver IC due to heat.

In addition, the liquid crystal display according to another embodiment of the present invention has a heat radiation effect of 25 degrees or more by the heat radiation layer.

In addition, the liquid crystal display device according to another embodiment of the present invention is provided with a COF including a heat radiation layer without using a separate structure can minimize the cost increase for heat radiation.

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

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 a liquid crystal display cut along the line II ′ of FIG. 1, and FIG. A perspective view of a COF.

As shown in FIGS. 1 to 3, the liquid crystal display device 100 according to an exemplary embodiment may include a liquid crystal display panel 110 on which an image is displayed, and a lower surface of an edge of the liquid crystal display panel 110. And a panel guide 115 for supporting the backlight unit 120 coupled to the panel guide 115 to provide light to the liquid crystal display panel 110.

The liquid crystal display device 100 according to an exemplary embodiment of the present invention surrounds the top edge of the liquid crystal display panel 110 to reduce cost and weight, and is advantageous in slimming, and eliminates the top case coupled to the backlight unit 120. Structure.

Although not shown in detail, the liquid crystal display panel 110 is bonded to a thin film transistor (TFT) substrate and a color filter substrate to maintain a uniform cell gap facing each other, and a liquid crystal layer interposed between the two substrates. It includes. In the thin film transistor substrate, a plurality of gate lines are formed, a plurality of data lines intersecting the plurality of gate lines are formed, and a thin film transistor TFT is formed at an intersection area of the gate line and the data line.

A gate driving printed circuit board (111) for supplying a scan signal to a gate line is provided at an edge of the liquid crystal display panel 110, and a data driving printed circuit board (112) for supplying a data signal to a data line (112). ) Is provided.

The gate and data driving PCBs 111 and 112 are electrically connected to the liquid crystal display panel 110 by a chip on film 113.

The backlight unit 120 will be described as an example of a direct method provided in a large liquid crystal display device of 20 inches or more.

The backlight unit 120 includes a box-shaped bottom cover 190 having an upper surface opened, a plurality of light sources 150 disposed at regular intervals on the bottom cover 190, and a plurality of light sources 150. A diffusion plate 131 disposed on the diffusion plate 131 to diffuse light first, optical sheets 130 disposed on the diffusion plate 131 to collect and secondary diffuse light, and the plurality of light sources 150. The reflective sheet 180 is disposed under the light reflecting light traveling in the lower direction of the light source 150 toward the liquid crystal display panel 110.

The backlight unit 120 includes first and second light source drivers 160a and 160b disposed at both ends of the plurality of light sources 150 to supply driving signals.

The first and second light source drivers 160a and 160b may be mounted on the first and second drive PCBs 161a and 161b and the first and second drive PCBs 161a and 161b to provide light sources 150. Both ends of the first and second grips 170a and 170b are fastened to each other.

The backlight unit 120 is disposed on both ends of the plurality of light sources 150 to guide the light emitted from the light source 150 to the edge region of the liquid crystal display panel 110, and the diffusion plate 131 and the optical sheets ( It further includes a first and second support side (140a, 140b) for supporting 130.

Although the light source 150 is limited to an external eletrode fluorescent lamp (EEFL) covering both ends of the outer region, the present invention is not limited thereto, and a cold cathode fluorescent lamp (CCFL) is provided. May be

The driver IC 114 is mounted on one surface of the chip on film 113, and the heat dissipation member 200 for heat dissipation is disposed on the other surface.

One side of the COF 113 is formed with a first pad portion 113a electrically connected to the wiring of the liquid crystal display panel 110, and the other side is electrically connected to the gate and data driving PCBs 111 and 112. 2 pad portions 113b are formed.

The COF 113 having such a structure is a structure in which a complicated wiring is formed on a flexible insulating film, and a heat resistant plastic film such as PET (polyester) or PI (polyimide) is used.

The driver IC 114 mounted on one surface of the COF 113 generates heat when the liquid crystal display device 100 is driven, and the heat dissipation member 200 has a function of absorbing heat generated from the driver IC 114. Have That is, the heat dissipation member 200 has a function of absorbing heat generated from the driver IC 114 to prevent damage to the driver IC 114 due to heat.

The heat dissipation member 200 is made of a metal material having excellent thermal conductivity and flexibility. That is, the heat dissipation member 200 may be made of, for example, aluminum (Al).

Although not shown in detail in the drawing, the heat radiation member 200 has an adhesive material formed on one surface thereof, and has flexibility.

Here, the adhesive material may include a conductive material to quickly transfer heat from the driver IC 114.

The heat dissipation member 200 is attached so as to be in surface contact with the entire other surface of the COF 113 except for the first and second pad portions 113a and 113b of the COF 113.

In the liquid crystal display according to the exemplary embodiment described above, the heat dissipation member 200 that absorbs the heat of the driver IC 114 mounted on one surface of the COF 113 is disposed on the other surface of the COF 113. The damage to the driver IC 114 due to heat can be prevented.

In addition, the COF 113 of the present invention has a heat radiation effect of 25 degrees or more by the heat radiation member 200.

4 is a cross-sectional view showing a COF according to another embodiment of the present invention.

As illustrated in FIG. 4, the COF 300 according to another embodiment of the present invention is a flexible substrate disposed between the liquid crystal display panel and the gate and the data driving PCB.

The COF 300 includes a base film 301, a heat dissipation layer 302 formed on one surface of the base film 301, a first insulating layer 303 formed on one surface of the heat dissipation layer 302, and the first film. A driver mounted on one surface of the first insulating layer 303, a second insulating layer 305 formed on one surface of the wiring pattern 304, and a surface of the second insulating layer 305. IC 306 is included.

The heat dissipation layer 302 is made of a metal material having excellent thermal conductivity to absorb heat generated from the driver IC 306.

The first insulating layer 303 has a function of electrically blocking the heat dissipation layer 302 and the wiring pattern 304 to prevent a short circuit of the wiring patterns 304 from being shorted by the heat dissipation layer 302. .

According to another exemplary embodiment of the present invention, a liquid crystal display (LCD) device includes a COF 300 including a heat dissipation layer 302, and the heat dissipation layer 302 absorbs heat generated from the driver IC 306 and causes the driver IC to generate heat. Damage to 306 can be prevented.

In addition, the liquid crystal display according to another exemplary embodiment has a heat dissipation effect of 25 degrees or more by the heat dissipation layer 302.

In addition, the liquid crystal display device according to another embodiment of the present invention may be provided with a COF 300 including a heat dissipation layer 302 without using a separate structure to minimize the cost increase for heat dissipation.

In the above description, the COFs 113 and 300 and the heat dissipation member 200 of the present invention are limited and described through two embodiments. However, the present disclosure is not limited thereto, and the shape and structure of the heat dissipation member 200 may be changed. In addition, the position of the heat dissipation layer 302 included in the COF 300 may be changed.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical 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 defined by the claims.

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 of the liquid crystal display taken along the line II ′ of FIG. 1.

3 is a perspective view showing a COF of the present invention.

4 is a cross-sectional view showing a COF according to another embodiment of the present invention.

Claims (7)

A liquid crystal display panel formed by crossing a plurality of gate lines and a plurality of data lines; A driving PCB disposed at an edge of the liquid crystal display panel to supply a driving signal to the gate and the data line; A plurality of chip on film (COF) for electrically connecting the liquid crystal display panel and the driving PCB; A driver IC mounted on one surface of the plurality of COFs; And And a heat dissipation member disposed on other surfaces of the plurality of COFs to absorb heat generated from the driver IC. According to claim 1, The heat dissipation member is made of a metal material having excellent thermal conductivity and flexibility. According to claim 1, Liquid crystal display device characterized in that an adhesive material including a conductive material is formed on one surface of the heat dissipation member. According to claim 1, And a first pad part electrically connected to the wiring of the liquid crystal display panel on one side of the plurality of COFs, and a second pad part electrically connected to the driving PCB on the other side of the plurality of COFs. 5. The method of claim 4, And the heat dissipation member is attached to the other surface of the COF except for the region where the first and second pad portions are formed. A liquid crystal display panel formed by crossing a plurality of gate lines and a plurality of data lines; A driving PCB disposed at an edge of the liquid crystal display panel to supply a driving signal to the gate and the data line; And A plurality of chip on film (COF) for electrically connecting the liquid crystal display panel and the driving PCB; The plurality of COF is a liquid crystal display, characterized in that the heat radiation layer to absorb the temperature of the driver IC is formed. The method according to claim 6, The COF is, Base film of flexible material; The heat dissipation layer formed on one surface of the base film; A first insulating layer formed on one surface of the heat dissipation layer; A wiring pattern formed on one surface of the first insulating layer; A second insulating layer formed on one surface of the wiring pattern; And And the driver IC mounted on one surface of the second insulating layer.
KR1020090107777A 2009-11-09 2009-11-09 Liquid clystal display device KR20110051106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090107777A KR20110051106A (en) 2009-11-09 2009-11-09 Liquid clystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090107777A KR20110051106A (en) 2009-11-09 2009-11-09 Liquid clystal display device

Publications (1)

Publication Number Publication Date
KR20110051106A true KR20110051106A (en) 2011-05-17

Family

ID=44361532

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090107777A KR20110051106A (en) 2009-11-09 2009-11-09 Liquid clystal display device

Country Status (1)

Country Link
KR (1) KR20110051106A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9265182B2 (en) 2012-10-30 2016-02-16 Samsung Display Co., Ltd. Flat panel display
US9301428B2 (en) 2012-12-18 2016-03-29 Samsung Display Co., Ltd. Display apparatus
KR20160051401A (en) * 2014-11-03 2016-05-11 엘지디스플레이 주식회사 Flat panel display device module
US20220317363A1 (en) * 2020-10-22 2022-10-06 Wuhan Chana Star Optoelectronics Technology Co., Ltd. Chip heat dissipation structure and liquid crystal display device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9265182B2 (en) 2012-10-30 2016-02-16 Samsung Display Co., Ltd. Flat panel display
US9480190B2 (en) 2012-10-30 2016-10-25 Samsung Display Co., Ltd. Flat panel display
US9301428B2 (en) 2012-12-18 2016-03-29 Samsung Display Co., Ltd. Display apparatus
KR20160051401A (en) * 2014-11-03 2016-05-11 엘지디스플레이 주식회사 Flat panel display device module
US20220317363A1 (en) * 2020-10-22 2022-10-06 Wuhan Chana Star Optoelectronics Technology Co., Ltd. Chip heat dissipation structure and liquid crystal display device
US11789199B2 (en) * 2020-10-22 2023-10-17 Wuhan China Star Optoelectronics Technology Co., Ltd. Chip heat dissipation structure and liquid crystal display device

Similar Documents

Publication Publication Date Title
US9158059B2 (en) Backlight module and liquid crystal display module using same
US9417494B2 (en) Display module and display apparatus having the same
US9052545B2 (en) Liquid crystal display device
US8253887B2 (en) Backlight unit and liquid crystal display device having the same
KR100954330B1 (en) Liquid crystal display device using the light emitting diode
US8152354B2 (en) Light source unit, manufacturing method thereof, and display device having the same
KR20150077153A (en) Light source module and backlight unit having the same
US7782419B2 (en) Backlight unit and liquid crystal display device having the same
US8284349B2 (en) Backlight unit and liquid crystal display device module including the same
KR20110051106A (en) Liquid clystal display device
KR20110062605A (en) Back light unit for display device
KR20110066053A (en) Liquid clystal display device
KR101510906B1 (en) Liquid crystal display device
KR101818460B1 (en) Back light unit and liquid crystal display device using the same
KR101578211B1 (en) Backlight unit and liquid crystal display device having the same
KR101291920B1 (en) Backlight unit and liquid crystal display device having the same
KR20100072504A (en) Liquid crystal display device
KR101274898B1 (en) Liquid crystal display
JP2021190334A (en) Illuminating device for display device, and display device
KR20080075301A (en) Liquid crystal display
KR101510907B1 (en) Backlight unit and liquid crystal display device having the same
KR101158599B1 (en) Backlight unit and liquid crystal display having the same
KR20120086526A (en) Backlight Unit and Liquid Display Device including the Same
KR20110070542A (en) Liquid crystal display device
KR101651676B1 (en) Liquid crystal display device

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination