KR101382398B1 - Lamp grip portion and backlight unit for liquid crystal display device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a direct type liquid crystal display device using an external electrode fluorescent lamp as a light source.

A characteristic of the present invention is that the lamp holder of the common electrode is configured to be fluid within a certain range, so that when the fluorescent lamp is driven, the external electrode of the fluorescent lamp momentarily thermally expands along the longitudinal direction of the fluorescent lamp to press the lamp holder to fix the external electrode. Even if this is applied, its pressure is absorbed by the fluidity of the lamp holder.

As a result, friction between the external electrode and the lamp holder does not occur, noise can be generated, and the fluorescent lamp can be stably fixed and supported, and voltage can be applied to the fluorescent lamp, thereby serving as a unique role of the common electrode. Can be done.

EEFL, external electrode, common electrode, thermal expansion, liquid crystal display

Description

Lamp grip portion and backlight unit for liquid crystal display device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a direct type liquid crystal display device using an external electrode fluorescent lamp as a light source.

2. Description of the Related Art In recent years, the display field has rapidly developed in line with the information age. In response to this trend, a flat panel display device (FPD) having a thinness, light weight, A plasma display panel (PDP), an electroluminescence display device (ELD), and a field emission display device (FED) : CRT).

Among them, the liquid crystal display device is most actively used in the field of notebooks, monitors, TVs, etc. due to its excellent contrast ratio and high contrast ratio. The liquid crystal display device is a device that does not have a light emitting element. It requires a light source.

Accordingly, a backlight unit having a lamp is provided on the back surface, and light is irradiated toward the front of the liquid crystal panel, thereby realizing an image of a brightness that can be recognized only through the backlight unit.

On the other hand, the general backlight unit is divided into an edge type (edge type) and a direct type (direct type) according to the arrangement of the lamp, the edge type has a structure in which one or a pair of lamps are disposed on one side of the light guide plate, Two or two pairs of lamps have a structure in which both sides of the light guide plate are arranged, and the direct type has a structure in which several lamps are arranged under the optical sheet.

In this case, a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL) and a light emitting diode (LED) are used as the lamp.

Nowadays, the trend is to use an external electrode fluorescent lamp that can ensure long life and light weight while ensuring high brightness and high efficiency of the liquid crystal display of the larger size.

1 is a cross-sectional view of a liquid crystal display using a general direct type backlight unit.

As shown in the drawing, a general liquid crystal display device module includes a liquid crystal panel 10 including first and second substrates 12 and 14 and a backlight unit 20 behind the liquid crystal panel 10. The top cover 40 covering the front edge of the liquid crystal panel 10 and the cover bottom 50 covering the back surface of the backlight unit 20 in the state in which the support main 30 is wrapped are respectively coupled in front and rear to mediate the support main 30. Are integrated into.

The backlight unit 20 includes a reflective sheet 22, and a plurality of fluorescent lamps 24 are arranged side by side on an upper surface thereof, and a plurality of optical sheets 26 are interposed therebetween. .

At this time, the fluorescent lamp 24 is an external electrode fluorescent lamp that is configured with an external electrode on the outer surface of both ends of the glass tube, the external electrode fluorescent lamp 24 is arranged on the reflective sheet 22 with a plurality of predetermined intervals side by side. The voltage is applied by a common electrode (not shown) which simultaneously connects external electrodes (not shown) to simultaneously apply external voltages to the plurality of external electrode fluorescent lamps 24.

FIG. 2 is a view schematically illustrating an appearance of a common electrode applying a voltage to an external electrode and an external electrode fluorescent lamp of the external electrode fluorescent lamp.

As shown, the fluorescent lamp 24 is formed so that the electrode 24b surrounds the outer surface of both ends of the glass tube 24a, and contacts the external electrodes 24b at both ends of the fluorescent lamp 24 to apply a voltage. In addition, an integrated common electrode 23 for fixing the fluorescent lamp 24 is configured.

The common electrode 23 includes first and second common electrode lines 29a and 29b and a plurality of holders 21 connected to the first and second common electrode lines 29a and 29b.

In this case, the holder 21 directly fixes the fluorescent lamp 24. The holder 21 is spaced apart along the longitudinal direction of the first and second common electrode lines 29a and 29b and constitutes the number of fluorescent lamps 24.

Further, in order to prevent left and right horizontal flow of the fluorescent lamp 24, the common electrode 23 is formed to be perpendicular to the outer end of the second common electrode line 29b on which the end of the fluorescent lamp 24 is seated. It is further provided with a stopper (25).

Accordingly, the plurality of fluorescent lamps 24 are fixed and supported at both ends by the holders 21 of the common electrodes 23 configured at one side and the other side of the liquid crystal display, so that the fluorescent lamps 24 do not flow or break due to impact from the outside. It is stably fixed and receives a voltage through the holder 21.

However, the common electrode 23 provided to apply voltages to the plurality of fluorescent lamps 24 may include first and second common electrode lines 29a and 29b and first and second common electrode lines 29a and The plurality of holders 21 connected to the 29b) are all formed by press working, and the manufacturing process is difficult and the production cost is high because it must be made of a conductive metal material so that voltage can flow.

In addition, when the fluorescent lamp 24 is driven, noise or the like is generated by the external electrode 24b instantaneously thermally expanding along the longitudinal direction of the fluorescent lamp 24.

The present invention is to solve the above problems, the first object is to reduce the process cost by the common electrode for applying a voltage to the fluorescent lamp, and solves the problems caused by thermal expansion when driving the fluorescent lamp It is intended as a second purpose.

In order to achieve the above object, the present invention provides a ring-shaped holder for directly fixing the fluorescent lamp; It includes a lead portion for supporting both edges of the holder, the holder provides a lamp fixing, characterized in that located at a predetermined distance from the bottom surface by the lead portion.

The lamp fixing portion is a conductor, and the holder is a plurality of spaced apart in one direction is formed integrally, the lead portion is a first lead extending from both edges of the holder, the opposite of the holder is configured in the first lead And a second lead bent vertically downward in the direction, and a third lead vertically bent at one edge of the second lead to be parallel to the first lead, wherein the cross-section is stair-shaped.

At this time, the first lead is characterized in that the positioning hole is formed, the third lead is characterized in that the notching (notching) portion is configured.

In addition, the present invention is an insulating substrate formed with a common electrode pattern along one direction of the edge longitudinal direction; A lamp fixing part mounted on the insulating substrate and electrically contacting the common electrode pattern, the lamp fixing part including a holder having lead parts on two sides in two directions perpendicular to the first direction, wherein the holder part includes the lead part. Provided is a common electrode printed circuit board for a backlight unit, wherein the common substrate is spaced apart from the insulating substrate by a predetermined distance.

In this case, the lead part includes a first lead extending from both edges of the holder, a second lead bent vertically downward in the opposite direction in which the holder is configured in the first lead, and one edge of the second lead is vertically bent And a third lead parallel to the first lead, wherein the common electrode pattern and the third lead are electrically contacted with each other.

In this case, at least two common electrode patterns may be formed on the insulating substrate at predetermined intervals.

In addition, the present invention and the reflection sheet; A plurality of external electrode fluorescent lamps arranged side by side on the reflective sheet; Fixing and supporting the plurality of external electrode fluorescent lamps, applying a voltage to the external electrode fluorescent lamps, and mounted on the insulating substrate, an insulating substrate having a common electrode pattern formed along one direction in an edge length direction thereof, A lamp fixing part electrically contacting the common electrode pattern, the lamp fixing part including a holder having lead portions at both sides in two directions perpendicular to the first direction; And a plurality of optical sheets interposed on the plurality of external electrode fluorescent lamps, wherein the external electrode fluorescent lamp is fixed by the holder, and the external electrode fluorescent lamp is spaced apart from the insulating substrate by the lead portion. It provides a backlight unit for a liquid crystal display device characterized in that the position.

As described above, by fixing the fluorescent lamp in accordance with the present invention and by configuring a lamp fixing portion for applying a voltage to the fluorescent lamp to be fluid within a certain range, there is no friction between the external electrode and the lamp holder and noise is While not generated, the fluorescent lamp can be stably fixed and supported, and voltage can be applied to the fluorescent lamp to perform a unique role of the common electrode for the backlight unit.

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

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

As shown in the figure, the liquid crystal display module includes a liquid crystal panel 110, a backlight unit 120, a support main body 130, a cover bottom 150, and a top cover 140.

First, the liquid crystal panel 110 plays a key role in image display and includes first and second substrates 112 and 114 which are bonded to each other with a liquid crystal layer interposed therebetween.

In this case, although it is not clearly shown in the drawings under the premise of an active matrix method, a plurality of gate lines and data lines intersect on the inner surface of the first substrate 112, which is commonly referred to as a lower substrate or an array substrate, and a pixel is defined. Thin film transistors (TFTs) are provided at each intersection to be connected one-to-one with the transparent pixel electrodes formed in each pixel.

On the inner surface of the second substrate 114, which is called an upper substrate or a color filter substrate, color filters of R, G, and B colors corresponding to the respective pixels, a gate line and a data line, And a black matrix covering a non-display element such as a thin film transistor is provided. In addition, a transparent common electrode covering these elements is provided.

In addition, the printed circuit board 118 is connected to at least one edge of the liquid crystal panel 110 through a connecting member 116 such as a flexible circuit board, and thus the side surface or cover bottom 150 of the support main 130 is modularized. ) It is flipped to the back and adhered.

At this time, the printed circuit board 118 is divided into a gate driver circuit that scan-transmits the on / off signal of the thin film transistor to the gate line and a data driver circuit that transmits image signals for each frame to the data line. It can be located with two edges adjacent to each other.

Accordingly, in the liquid crystal panel 110 having the above-described structure, when the thin film transistor selected for each gate line is turned on by the on / off signal of the gate driver circuit which is scanned and transmitted, the signal voltage of the data driver circuit is applied to the corresponding pixel through the data line. The direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode.

In this case, polarizing plates 119a and 119b for selectively transmitting only specific polarized light are attached to outer surfaces of the first and second substrates 112 and 114.

In addition, although not clearly shown in the drawings, the upper and lower alignment layers for determining the initial molecular alignment direction of the liquid crystal are interposed between the two substrates 112 and 114 of the liquid crystal panel 110 and the liquid crystal layer, and filled therebetween. Seal patterns are formed along edges of both substrates 112 and 114 to prevent leakage of the liquid crystal layer.

A backlight unit 120 is provided to supply light from the rear surface of the liquid crystal panel 110 so that the difference in transmittance represented by the liquid crystal panel 110 is externally displayed.

The backlight unit 120 is composed of a reflective sheet 122, a plurality of fluorescent lamps 124 and a plurality of optical sheets 126, a plurality of fluorescent lamps 124 are arranged on the reflective sheet 122, A plurality of optical sheets 126 are positioned above these fluorescent lamps 124.

In this case, the fluorescent lamp 124 used as the light source of the backlight unit 120 is an external electrode fluorescent lamp having an external electrode 124b formed on the outer surface of both ends of the glass tube. The fluorescent lamp 124 is a reflective sheet 122. A plurality of electrodes are arranged side by side at a predetermined interval, and the common electrode printed circuit board 123 is configured to simultaneously apply voltages to the plurality of fluorescent lamps 124 by collectively connecting the external electrodes 124b.

A pair of side supports 128 for fixing / supporting the plurality of fluorescent lamps 124 and the common electrode printed circuit board 123 are provided and fastened to the cover bottom 150.

In this case, in addition to fixing the common electrode printed circuit board 123 and the fluorescent lamp 124, the side support 128 serves to make the interval between the fluorescent lamp 124 and the plurality of optical sheets 126 constant. Done.

Here, the reflective sheet 122 is located on the back of the plurality of fluorescent lamps 124, and reflects the light emitted from the back of the fluorescent lamp 124 toward the liquid crystal panel 110 to improve the brightness of the light.

In addition, the plurality of optical sheets 126 disposed apart from the fluorescent lamp 124 by a predetermined distance may include a diffusion sheet and at least one light collecting sheet.

Therefore, the light emitted from the plurality of fluorescent lamps 124 is processed into a uniform high quality while passing through the optical sheet 126 and then incident to the liquid crystal panel 110, by which the liquid crystal panel 110 is finally high brightness. Can display an image.

The liquid crystal panel 110 and the backlight unit 120 are modularized through a top cover 140, a support main 130 and a cover bottom 150. The top cover 140 is disposed on the upper surface and the side surface of the liquid crystal panel 110, The top cover 140 is opened so that an image formed on the liquid crystal panel 110 is displayed.

In addition, a support frame 130 having a rectangular frame shape covering the edges of the liquid crystal panel 110 and the backlight unit 120 is provided, and the cover bottom 150 on which the liquid crystal panel 110 and the backlight unit 120 is seated is provided. It is composed of a plate shape whose four edges are bent vertically upwards.

Meanwhile, the common electrode printed circuit board 123 for simultaneously applying voltage to the plurality of fluorescent lamps 124 described above includes a common electrode line and a plurality of lamp fixing parts connected to the common electrode line, and the common electrode line is made of metal. The pattern is formed on the insulator substrate, which will be described in more detail with reference to FIG. 4.

4 is a view schematically showing the external electrode and the common electrode printed circuit board of the fluorescent lamp, and FIG. 5 is a view schematically showing the structure of the lamp holder of FIG.

As illustrated, the fluorescent lamp 124 is an external electrode fluorescent lamp in which the external electrode 124b surrounds the outer surface of both ends of the glass tube 124a. The fluorescent lamp 124 is formed of inert gas, mercury (Hg) molecules, etc. mixed inside the glass tube 124a. The inert discharge gas is filled, and a fluorescent material is coated on the inner wall of the glass tube 124a.

The fluorescent lamp 124 is in contact with the external electrode 124b configured at both ends to receive an external voltage, and requires a separate means for stably fixing on the reflective sheet 122 of FIG. 3, which is common. The electrode is made through the printed circuit board 123.

Here, referring to the common electrode printed circuit board 123 in detail, the common electrode printed circuit board 123 is a plate on which the first and second common electrode patterns 129a and 129b for voltage application along the length direction are formed. The insulating substrate 127 has a shape and a plurality of lamp fixing parts 170 connected to the first and second common electrode patterns 129a and 129b.

The lamp fixing part 170 directly fixes the fluorescent lamp 124 in a shape in which a plurality of holders 171a and 171b spaced apart in one direction are integrally formed. The lamp fixing parts 170 are spaced apart along the length direction of the first and second common electrode patterns 129a and 129b to form the number of fluorescent lamps 124.

At this time, the lamp fixing unit 170 is composed of a conductor to which a voltage can be applied through the first and second common electrode patterns (129a, 129b), the fluorescence which is fixed in direct contact with the lamp fixing unit 170 A voltage may be applied to the external electrode 124b of the lamp 124.

Accordingly, the plurality of fluorescent lamps 124 are fixed and supported at both ends by lamp fixing parts 170 of the common electrode printed circuit board 123 configured on one side and the other side of the liquid crystal display, and flow by impact from the outside. It can be fixed stably so as not to be damaged or broken.

In addition, the common electrode printed circuit board 123 is formed of an insulating substrate 127, and the first and second common electrode patterns 129a and 129b are formed on the insulating substrate 127 to thereby form the first and second common. Voltages may be collectively applied to the plurality of fluorescent lamps 124 through the lamp fixing unit 170 electrically connected to the electrode patterns 129a and 129b.

That is, the plurality of fluorescent lamps 124 arranged in parallel by the common electrode printed circuit board 123 are electrically connected, and the plurality of fluorescent lamps 124 is driven by one inverter (not shown).

As a result, the process cost can be reduced compared to the common electrode 23 of FIG.

On the other hand, a high voltage is applied to drive the fluorescent lamp 124 fixed to the lamp fixing portion 170 of the common electrode printed circuit board 123, wherein the external electrode 124b of the fluorescent lamp 124 is instantaneous Thus, the fluorescent lamp 124 is thermally expanded along the longitudinal direction.

Therefore, the lamp fixing part 170 should be designed to allow the external electrode 124b of the fluorescent lamp 124 to expand in consideration of thermal expansion of the external electrode 124b.

However, in order to have a margin due to expansion of the external electrode 124b, in some cases, the lamp fixing unit 170 weakly configures a force for fixing the fluorescent lamp 124, which is the external electrode of the fluorescent lamp 124 ( The moment 124b thermally expands, friction occurs between the external electrode 124b of the fluorescent lamp 124 and the lamp fixing part 170, and noise causes noise.

Accordingly, in the present invention, the lamp fixing unit 170 configured on the common electrode printed circuit board 123 without noise by preventing friction from occurring between the external electrode 124b and the lamp fixing unit 170 may include an external electrode ( It is characterized in that it is configured to respond to the expansion of 124b).

Referring to this in more detail with reference to Figure 5, the lamp fixing part 170 is configured as a gripper (gripper) type, that is, a fluorescent lamp in a shape consisting of a plurality of holders (171a, 171b) spaced in one direction integrally It is a ring shape having elasticity to which 124 can be fitted and fixed.

Therefore, the lamp fixing part 170 directly fixes the external electrodes 124b across the fluorescent lamp 124.

The lamp fixing unit 170 further includes lead portions 173 at both side edges of the longitudinal direction in which the fluorescent lamp 124 is seated. The holder 171a of the lamp fixing portion 170 is formed through the lead portion 173. , 171b is spaced apart from the insulating substrate 127 by a predetermined interval.

That is, the shape of the lead portion 173 may be configured in the form of a stair cross-section, the first lead 173a extending from both edges of the holder (171a, 171b), and the first lead (173a) The second lead 173b bent vertically downward in the opposite direction in which the holders 171a and 171b are configured, and one edge of the second lead 173b is vertically bent to form a third lead parallel to the first lead 173a ( 173c).

Therefore, the holders 171a and 171b are positioned to be spaced apart from the insulating substrate 127 by a predetermined interval.

As a result, the external electrodes 124b and the insulating substrate 127 of the lamp 124 fixed by the holders 171a and 171b are directly spaced apart from each other by a predetermined distance, and thus are generated when the lamp 124 is driven. It is possible to prevent the insulating substrate 127 from being exposed to heat by heat, thereby improving its long-term reliability.

In addition, the first and second common electrode patterns 129a and 129b formed on the insulating substrate 127 may also have thermal resistance due to heat generated when the lamp 124 is driven, which is applied to the lamp 124. A deviation in the voltage may be generated, which may cause a luminance deviation of the lamps 124, which can also be prevented.

In this case, the lamp fixing unit 170 is mounted on the first and second common electrode patterns 129a and 129b of the insulating substrate 127 through a surface mount technology (SMT) method, which is used for thinning and high density mounting. One method is to use a soldering method such as soldering.

Therefore, the lamp fixing part 170 is electrically connected to the first and second common electrode patterns 129a and 129b of the insulating substrate 127 through the third lead 173c to form the first and second common electrode patterns ( The voltage flowing through the 129a and 129b is applied to the holders 171a and 171b, wherein the third lead 173c is soldered by soldering with the first and second common electrode patterns 129a and 129b. It is fixed.

In this case, although the third lead 173c may be configured to be parallel to the first lead 173a to face each other, the third lead 173c may be formed to be shifted so as not to face the first lead 173a to facilitate the soldering process. desirable.

On the other hand, the notch 175 is further formed in the third lead 173c to increase the solder contact area during the soldering process with the first and second common electrode patterns 129a and 129b. I can increase it more.

In addition, a positioning hole 177 may be formed at one side of the first lead 173a. On the insulating substrate 127, any mark may not be formed at the exact position where the lamp fixing part 170 is to be mounted. Position), so that the positioning hole 177 can identify the exact position where the lamp fixing portion 170 is to be mounted in the process of mounting the lamp fixing portion 170 on the insulating substrate 127. .

Here, the lead portion 173 is a means for reducing the vibration and impact of the lamp fixing portion 170, the lead portion 170 has a spring-like elastic restoring force, when the external pressure is applied to the lead portion 170 has fluidity within a certain range.

Therefore, the lamp fixing part 170 also has fluidity within a predetermined range through the lid part 173, and absorbs its vibration and shock by fluidity even if vibration and shock are applied by any pressure.

In particular, the fluidity of the lamp fixing part 170 through the lead portion 173 is along the longitudinal direction of the fluorescent lamp 124. Therefore, the lamp fixing part 170 fixing the external electrode 124b by thermally expanding the external electrode 124b of the fluorescent lamp 124 along the longitudinal direction of the fluorescent lamp 124 when the fluorescent lamp 124 is driven. Even if the furnace pressure is applied, its pressure is absorbed by the flow of the ramp fixing unit 170 having fluidity through the lid unit 173.

For this reason, in the present invention, even if the external electrode 124b is expanded, friction does not occur between the external electrode 124b and the lamp fixing part 170, and no noise is generated and the fluorescent lamp 124 is stably fixed and supported. The voltage may be applied to the fluorescent lamp 124 at the same time.

FIG. 6 is a cross-sectional view taken along line VI-VI ′ of FIG. 3.

As illustrated, the reflective sheet 122 and the plurality of optical sheets 126 are stacked therein, and are formed on the reflective sheet 122, and the lamp fixing parts 170 of the common electrode printed circuit board 123 are disposed on the reflective sheet 122. A plurality of fluorescent lamps 124 fixed and supported by the external voltage and a pair of side supports 128 for fixing / supporting the common electrode printed circuit board 123 and the fluorescent lamp 124; The support main 130 supporting the liquid crystal panel 110 and the cover bottom 150 are coupled to the rear surface thereof, and the top cover 140 surrounding the edge of the liquid crystal panel 110 includes the support main 130 and the cover bottom ( 150).

In addition, the lamp driving circuit (not shown) for driving the fluorescent lamp 124 is connected to the fluorescent lamp 124 through a lead wire (not shown) connected to the common electrode printed circuit board 123, the cover bottom 150 It is mounted on the back of the.

Here, the common electrode printed circuit board 123 that fixes the fluorescent lamp 124 and applies a voltage to the external electrode 124a of the fluorescent lamp 124 may include a plurality of lamp fixing parts 170 on the insulating substrate 127. At this time, the holder 171a, 171b of the lamp fixing part 170 is positioned to be spaced apart from the insulating substrate 127 by a predetermined distance (G) through the lead portion 173 formed in a step shape in the cross-sectional area. do.

At this time, the lead portion 173 has an elastic restoring force, and when the fluorescent lamp 124 is driven, the external electrode 124b of the fluorescent lamp 124 instantaneously thermally expands along the longitudinal direction of the fluorescent lamp 124 so that the external electrode ( When pressure is applied to the lamp fixing part 170 fixing the 124b, the lamp fixing part 170 is within a predetermined range along the x direction in the longitudinal direction of the fluorescent lamp 124 through the elastic force of the lead part 173. You will have fluidity.

In addition, when the pressure is removed, the lamp fixing unit 170 is returned to its original position by the restoring force of the lead unit 173.

That is, since the pressure applied to the lamp fixing part 170 is absorbed through the fluidity within a predetermined range of the lamp fixing part 170, friction occurs between the external electrode 124b and the lamp fixing part 170. No noise is generated.

In addition, the insulating substrate 127 may be prevented from being exposed to heat by heat generated when the lamp 124 is driven, and the heat of the first and second common electrode patterns 129a and 129b formed on the insulating substrate 127 may be prevented. Resistance can be prevented from occurring.

On the other hand, in order to prevent left and right horizontal flow of the fluorescent lamp 124 on the common electrode printed circuit board 170, the upper end of the second common electrode pattern 129b on which the end of the fluorescent lamp 124 is seated is upward. It may further include a stopper (not shown) formed vertically.

In addition, in the above description and the accompanying drawings, although the holders 171a and 171b for directly fixing the external electrodes 124b of the lamp 124 are shown to be provided with a plurality of spaced intervals, the holders 171a and 171b are provided. One may be provided.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

1 is a cross-sectional view of a liquid crystal display device using a general direct type backlight unit.

2 is a view schematically showing the appearance of a common electrode applying a voltage to the external electrode and the external electrode fluorescent lamp of the external electrode fluorescent lamp.

3 is an exploded perspective view schematically showing a liquid crystal display module according to an embodiment of the present invention.

4 is a view schematically showing the external electrode and the common electrode printed circuit board of the fluorescent lamp.

5 is a view schematically showing the structure of the lamp holder of FIG.

FIG. 6 is a cross-sectional view taken along line VI-VI ′ of FIG. 3.

Claims (10)

An annular holder for directly fixing the fluorescent lamp; Leads supporting both edges of the holder The lead portion includes a first lead extending from both edges of the holder, a second lead bent vertically downward in the opposite direction in which the holder is configured in the first lead, and one edge of the second lead is vertically bent. And a third lead parallel to the first lead and having a stair shape in cross section, wherein the holder is positioned at a predetermined distance from the bottom surface by the lead part. The method according to claim 1, The lamp fixing part is a conductor, wherein the holder is a lamp fixing, characterized in that a plurality of spaced apart in one direction. delete The method according to claim 1, And a fixing hole is formed in the first lead. The method according to claim 1, And a notching portion is formed in the third lead. An insulating substrate on which a common electrode pattern is formed along one direction, which is an edge length direction; The lamp fixing part is mounted on the insulating substrate, and electrically connected to the common electrode pattern, and includes a holder having lead portions at both sides in two directions perpendicular to the first direction. The lead portion includes a first lead extending from both edges of the holder, a second lead bent vertically downward in the opposite direction in which the holder is configured in the first lead, and one edge of the second lead is vertically bent. And a third lead parallel to the first lead, wherein the holder is positioned at a predetermined distance from the insulating substrate through the lead part. delete The method according to claim 6, The common electrode printed circuit board of claim 1, wherein the common electrode pattern and the third lead are in electrical contact with each other. The method according to claim 6, And at least two common electrode patterns spaced apart from each other on the insulating substrate by a predetermined distance. A reflective sheet; A plurality of external electrode fluorescent lamps arranged side by side on the reflective sheet; Fixing and supporting the plurality of external electrode fluorescent lamps, applying a voltage to the external electrode fluorescent lamps, and mounted on the insulating substrate, an insulating substrate having a common electrode pattern formed along one direction in an edge length direction thereof, A lamp fixing part electrically contacting the common electrode pattern, the lamp fixing part including a holder having lead portions at both sides in two directions perpendicular to the first direction; A plurality of optical sheets interposed on the plurality of external electrode fluorescent lamps The lead portion includes a first lead extending from both edges of the holder, a second lead bent vertically downward in the opposite direction in which the holder is configured in the first lead, and one edge of the second lead is vertically bent. And a third lead parallel to the first lead, And the external electrode fluorescent lamp is fixed by the holder, and the external electrode fluorescent lamp is positioned spaced apart from the insulating substrate by the lead portion at a predetermined interval.

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