KR20100067514A - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

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Publication number
KR20100067514A
KR20100067514A KR1020080126099A KR20080126099A KR20100067514A KR 20100067514 A KR20100067514 A KR 20100067514A KR 1020080126099 A KR1020080126099 A KR 1020080126099A KR 20080126099 A KR20080126099 A KR 20080126099A KR 20100067514 A KR20100067514 A KR 20100067514A
Authority
KR
South Korea
Prior art keywords
fpcb
lcd
backlight unit
chassis
insertion portion
Prior art date
Application number
KR1020080126099A
Other languages
Korean (ko)
Inventor
조정민
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 KR1020080126099A priority Critical patent/KR20100067514A/en
Publication of KR20100067514A publication Critical patent/KR20100067514A/en

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    • 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
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • 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
    • 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
    • G02F1/13458—Terminal pads

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  • 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 relates to a liquid crystal display device, comprising: an LCD panel; A backlight unit positioned below the LCD panel and emitting light using a light emitting device; A backlight unit FPCB in which the light emitting element is mounted and a connection pad is formed; A chassis accommodating the LCD panel and the backlight unit and having an insertion portion formed at one side thereof; And an LCD FPCB electrically connected to the LCD panel and partially inserted into an insertion portion of the chassis to be electrically connected to the backlight unit FPCB.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}

The present invention relates to a liquid crystal display device.

In general, various electronic devices such as a mobile communication terminal, a digital camera, a notebook computer, a monitor, a TV, and the like include an image display device for displaying an image. Various types may be used as the image display device, but a flat display device having a flat plate shape is mainly used, and a liquid crystal display (LCD) is particularly widely used among the flat display devices.

Such a liquid crystal display device is one of flat panel display devices that display an image using liquid crystal, and is thinner and lighter than other flat panel display devices, and has an advantage of low driving voltage and low power consumption. Widely used throughout.

The present invention provides a liquid crystal display device that can simplify the fastening method between the LCD FPCB and the backlight unit FPCB.

Liquid crystal display device according to an embodiment of the present invention, the LCD panel; A backlight unit positioned below the LCD panel and emitting light using a light emitting device; A backlight unit FPCB in which the light emitting element is mounted and a connection pad is formed; A chassis accommodating the LCD panel and the backlight unit and having an insertion portion formed at one side thereof; And an LCD FPCB electrically connected to the LCD panel and partially inserted into an insertion portion of the chassis to be electrically connected to the backlight unit FPCB.

According to the present invention, the shapes of the LCD FPCB and the backlight unit FPCB used in the liquid crystal display device are modified and an insertion part is formed in the chassis to insert the LCD FPCB electrically connected to the backlight unit FPCB into the insertion part, thereby providing the LCD PFCB and the The fastening method of the backlight unit PFCB can be simplified.

Hereinafter, a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1A is a view illustrating a front surface of a backlight unit FPCB 10 according to an embodiment of the present invention, and FIG. 1B is a view illustrating a rear surface of the backlight unit FPCB 10 according to an embodiment of the present invention.

The LCD according to the present invention may include an LCD panel, a backlight unit, a backlight unit FPCB 10, a chassis 30, and an LCD FPCB 20.

The LCD panel (not shown) is disposed on the first substrate and the second substrate facing each other, the liquid crystal layer interposed between the first substrate and the second substrate, the lower side of the first substrate and the upper side of the second substrate. It includes a polarizing film, and displays an image using light from the backlight unit.

The first substrate is a substrate in which a thin film transistor, which is a switching element, is formed in a matrix form. A data line and a gate line are respectively connected to the source terminal and the gate terminal of the thin film transistors, and a pixel electrode made of a transparent conductive material is connected to the drain terminal.

The second substrate is a substrate disposed to face the first substrate, and formed with a thin film of RGB pixels for realizing color. A common electrode made of a transparent conductive material is formed on the second substrate so as to face the pixel electrode formed on the first substrate.

When power is applied to the gate terminal of the thin film transistor in the LCD panel and the thin film transistor is turned on, an electric field is formed between the pixel electrode and the common electrode. The liquid crystal arrangement of the liquid crystal layer disposed between the first substrate and the second substrate is changed by the electric field, and the light transmittance is changed according to the arrangement change of the liquid crystal to display an image of a desired gray scale.

The LCD panel further includes a driving unit for driving the first substrate. The driving unit generates a driving signal for driving the first substrate in response to various control signals applied from the outside. For example, the driving unit may be electrically connected to the first substrate through a chip on glass (COG) process.

The LCD FPCB 20 is connected to one end of the first substrate to apply various control signals to the LCD panel. For example, the LCD FPCB 20 may be electrically connected to the first substrate through a film on glass (FOG) process.

The LCD FPCB 20 may be connected to one end of the first substrate and bend to the lower side of the LCD panel. The LCD FPCB 20 may be made of a resin material having flexibility.

A backlight unit (not shown) is positioned below the LCD panel and emits light using the light emitting element 14. In the backlight unit, a reflection sheet reflecting light emitted from the light emitting element 14 upwards and disposed on the reflecting sheet receive light emitted from the light emitting elements 14, and are subjected to refraction, reflection, and scattering. And a light guide plate or the like that is directed upward.

In the backlight unit FPCB 10, the light emitting device 14 is mounted, and a connection pad 12 for applying power to the light emitting device 14 is formed. Specifically, as shown in FIGS. 1A and 1B, the backlight unit FPCB 10 according to the present invention includes at least one connection pad 12 and a light emitting element 14, and at least one connection pad on a front surface thereof. 12 is disposed, and the light emitting element 14 is mounted on the other surface.

The backlight unit FPCB 10 supplies driving power to the light emitting element 14 disposed on one surface thereof. The backlight unit FPCB 10 may be disposed below the first substrate so as to correspond to one end of the LCD panel connected to the LCD FPCB 20. The backlight unit FPCB 10 may be made of a resin material having flexibility with metal wiring.

The light emitting element 14 is disposed on one surface of the backlight unit FPCB 10 to generate light. One or more light emitting devices 14 may be mounted on one surface of the backlight unit FPCB 10, and may be formed of a light emitting diode (LED) that generates white light. The number of the light emitting elements 14 may vary depending on the size of the LCD panel and the brightness required.

2 is a diagram illustrating a portion of an LCD FPCB 20 according to an embodiment of the present invention.

As described above, the LCD panel displays a video signal. The LCD FPCB 20 is electrically connected to the LCD panel. In addition, one side of the LCD FPCB 20 is formed with a protrusion 24 that can be inserted into the insertion portion of the chassis 30 to be described later.

The protrusion 24 has a connection pad 22 of the LCD FPCB 20 that can be in contact with the connection pad 12 of the backlight unit FPCB 10. Accordingly, the LCD FPCB 20 may include a connection pad 22 for connection, and the connection pad 22 may be electrically connected to the connection pad 12 of the backlight unit FPCB 10.

3 is a view showing a portion of a liquid crystal display according to an exemplary embodiment of the present invention, in which the protrusion part 24 of the LCD FPCB 20 is inserted into the insertion part 32. Descriptions on the same elements as those described with reference to FIG. 1 will be omitted.

According to an exemplary embodiment of the present invention, a liquid crystal display (LCD) panel is positioned below the LCD panel, and includes a backlight unit that emits light using the light emitting element 14, and the light emitting element 14 is mounted, and a connection pad 12 is provided. A backlight unit having the FPCB 10, the LCD panel and the backlight unit formed therein, the chassis 30 having an insertion portion formed at one side thereof, and being electrically connected to the LCD panel, A part is inserted into the insertion part and includes an LCD FPCB 20 electrically connected to the backlight unit FPCB 10.

The chassis 30 is formed of a metallic material, and serves to protect the liquid crystal panel and the like from external impact. In addition, the chassis 30 forms an insertion portion 32 into which the protrusion 24 of the LCD FPCB 20 can be inserted.

In addition, the insertion part 32 of the chassis 30 is positioned to correspond to the connection pad 12 of the backlight unit FPCB 10.

As shown in FIG. 3, a backlight unit FPCB 10 is disposed below the chassis 30, and one surface on which the connection pad 12 is formed faces upward. Accordingly, the protrusion 24 of the LCD FPCB 20 is inserted into the insertion portion 32 of the chassis 30, and the connection pad 12 of the backlight unit 10 is connected to the LCD FPCB 20. The pad 22 is in contact.

Therefore, the connection pads 12 of the backlight unit 10 and the connection pads 22 of the LCD FPCB 20 should be positioned to correspond to each other, and the number thereof is also the same.

FIG. 4 is a cross-sectional view illustrating a state cut along line AA ′ of FIG. 3.

The insertion part 32 of the chassis 30a and 30b has an opening 34 formed at one side of the chassis 30. Since the protrusion 24 of the LCD FPCB 20 must be inserted through the opening 34, the opening 34 must have a predetermined space.

In addition, one side of the opening 34 is open to insert the protrusion 24 of the LCD FPCB 20, the other side of the opening 34 is formed in a closed structure.

The other side of the opening 34 extends to protrude upwards, and a portion of the lower surface of the protruding inserting portion 32 is fixed to the LCD to press the FPCB 20 inserted into the inserting portion 32 from above. May be in contact with the FPCB 20.

That is, the chassis 30b of the opened portion grasps the protrusion 22 of the inserted LCD FPCB 20 to be securely fixed.

However, according to the exemplary embodiment, the cross section of the insertion part 32 may have a '-' shape.

FIG. 5 is a view showing a part of a liquid crystal display according to another exemplary embodiment of the present invention, and shows a state in which the protrusion part 24 of the LCD FPCB 20 is inserted into the insertion part 32.

As shown in FIG. 5, a backlight unit FPCB 10 is disposed below the chassis 30, and one surface on which the connection pad 12 is formed faces upward. Accordingly, the protrusion 24 of the LCD FPCB 20 is inserted into the insertion portion 32 of the chassis 30, and the connection pad 12 of the backlight unit 10 is connected to the LCD FPCB 20. The pad 22 is in contact.

Therefore, the connection pads 12 of the backlight unit 10 and the connection pads 22 of the LCD FPCB 20 should be located to correspond to each other, and the number thereof is also the same.

FIG. 6 is a cross-sectional view illustrating a state cut along BB ′ of FIG. 5.

The insertion part 32 of the chassis 30 has an opening 34 formed at one side of the chassis 30. Since the protrusion 24 of the LCD FPCB 20 must be inserted through the opening 34, the opening 34 must have a predetermined space.

In addition, one side of the opening 34 is open so that the protrusion 24 of the LCD FPCB 20 is inserted, the other side of the opening 34 may also be formed in an open structure.

As shown in FIG. 6, the cross section of the insertion part 32 may have a rectangular shape, but is not limited thereto. The connection pad 22 of the inserted LCD FPCB 20 and the connection pad 12 of the backlight unit 10 may be in contact with each other. At this time, the chassis 30b of the protruding portion of the insertion portion 32 may hold the protrusion 22 of the inserted LCD FPCB 20 to be securely fixed.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

1A is a diagram illustrating a front surface of a backlight unit FPCB according to an embodiment of the present invention.

1B is a diagram illustrating a rear surface of a backlight unit FPCB according to an embodiment of the present invention.

2 is a view showing a portion of the LCD FPCB according to an embodiment of the present invention.

3 is a view illustrating a portion of a liquid crystal display according to an exemplary embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a state cut along line AA ′ of FIG. 3.

5 is a view illustrating a portion of a liquid crystal display according to another exemplary embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a state taken along line BB ′ of FIG. 5.

Claims (9)

LCD panel; A backlight unit positioned below the LCD panel and emitting light using a light emitting device; A backlight unit FPCB in which the light emitting element is mounted and a connection pad is formed; A chassis accommodating the LCD panel and the backlight unit and having an insertion portion formed at one side thereof; And An LCD FPCB electrically connected to the LCD panel and partially inserted into an insertion portion of the chassis to be electrically connected to the backlight unit FPCB; Liquid crystal display comprising a. The method of claim 1, wherein the insert of the chassis, An opening is formed at one side of the chassis, and one side of the opening is open to insert the LCD FPCB, and the other side is formed in a closed structure. The method of claim 2, The other side of the opening extends to protrude upward, and a portion of the lower surface of the protruding opening abuts the LCD FPCB so as to press and fix the LCD FPCB inserted into the insertion portion from above. The method of claim 2, A cross section of the insertion portion is a '-' liquid crystal display device. The method of claim 1, wherein the insert of the chassis, An opening is formed at one side of the chassis, and both sides and the other side of the opening is formed in an open structure. The method of claim 1, A connection pad is formed on one surface of the backlight unit FPCB, and a light emitting device is mounted on the other surface. The method of claim 1, And an insertion portion of the shanghai chassis and a connection pad of the backlight unit FPCB. The method of claim 1, And a protrusion in which a connection pad is disposed so that a portion of the LCD FPCB can be inserted into an insertion portion of the chassis. The method of claim 8, And a projection portion of the LCD FPCB is inserted into the chassis insertion portion and the insertion portion fixes the LCD FPCB such that the connection pad of the backlight unit FPCB and the connection pad of the LCD FPCB are connected to each other.
KR1020080126099A 2008-12-11 2008-12-11 Liquid crystal display KR20100067514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080126099A KR20100067514A (en) 2008-12-11 2008-12-11 Liquid crystal display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080126099A KR20100067514A (en) 2008-12-11 2008-12-11 Liquid crystal display

Publications (1)

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KR20100067514A true KR20100067514A (en) 2010-06-21

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KR1020080126099A KR20100067514A (en) 2008-12-11 2008-12-11 Liquid crystal display

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KR (1) KR20100067514A (en)

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