KR20070052567A - Surface light source, backlight assembly having the same and display deive having the same - Google Patents

Abstract

The present invention relates to a surface light source, a backlight assembly including the same, and a display device having the same, wherein the upper and lower panel glasses, a discharge through space provided between the upper panel glass and the lower panel glass, and the upper and lower panel glasses are provided. Provided is a surface light source including phosphors formed on opposite surfaces of a surface of a glass, and a reflective member provided on a lower surface of the lower panel glass, a backlight assembly including the same, and a display device having the same.

Surface light source, reflective film, reflective sheet, discharge through space, phosphor

Description

Surface light source, a backlight assembly including the same, and a display device having the same {SURFACE LIGHT SOURCE, BACKLIGHT ASSEMBLY HAVING THE SAME AND DISPLAY DEIVE HAVING THE SAME}

1 is a cross-sectional view of a surface light source according to the prior art.

2 is an exploded perspective view of the surface light source according to the first embodiment of the present invention.

3 is a cross-sectional view of the surface light source according to the first embodiment of the present invention.

4 is an exploded perspective view of a surface light source according to a second embodiment of the present invention.

5 is a sectional view of a surface light source according to a second embodiment of the present invention;

6 and 7 are cross-sectional views of a backlight assembly according to a third embodiment of the present invention.

8 is a cross-sectional view of a backlight assembly according to a fourth embodiment of the present invention.

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

<Explanation of symbols for the main parts of the drawings>

10, 20, 110, 120: panel glass 11, 12, 111, 121: phosphor

30, 130: discharge through space 100: surface light source

131: space division member 140: reflective sheet

150: sealing member 200: lower storage member

220: reflective member 1000: backlight assembly

The present invention relates to a surface light source, a backlight assembly including the same, and a display device having the same, and more particularly, to a surface light source from which a reflective film is removed.

In general, flat panel displays are classified into a light emitting type and a light receiving type. The light emitting type includes a cathode ray tube electroluminescent element, a plasma display panel, and the like, and a light receiving type includes a liquid crystal display.

In the case of a light-receiving type liquid crystal display, since it does not have a structure that emits light itself, an image cannot be visualized unless light is irradiated from the outside. Therefore, an backlight unit, which is a separate light source, is provided under the liquid crystal display panel to display an image.

Such a backlight unit includes a method using a cold cathode fluorescent lamp (CCFL) and a method using a flat fluorescent lamp (FFL).

In the case of using the CCFL, a diffusion plate and a light guide plate are separately installed between the liquid crystal panel and the backlight unit. However, this not only consumes a lot of manpower and a lot of time in the assembly process for manufacturing the flat panel display element, but also improves the uniformity of light when the light guide plate is used, but the loss of light emitted from the CCFL is large and the brightness is low. There is this.

On the other hand, when a surface light source is used, an assembly process for fabricating a flat panel display device can be simplified, and light uniformity as well as low light loss and high luminance are provided.

In general, the shape of the surface light source is formed using a meander-shaped curved molded glass as a top plate and a panel glass as a bottom plate to form a discharge penetration space, and by inserting a rod-shaped spacer between two panel glasses. It can be divided in such a manner as to secure a discharge through space.

The basic light emission principle of the surface light source is similar to that of a general fluorescent lamp, and electrons accelerated by an electric field collide with mercury while flowing in a discharge space containing an inert gas and mercury, and ultraviolet rays (254 nm) are emitted. This ultraviolet light excites the phosphor coated on the inner wall of the glass tube to emit visible light. The surface light source can be applied to both a hot cathode start method and a cold cathode start method, which is a startup method of a conventional fluorescent lamp, but usually adopts a cold cathode start method.

1 is a cross-sectional view of a surface light source according to the prior art.

Referring to FIG. 1, the reflective film 11 using alumina is formed on the lower panel glass 10, and the phosphor 12 is formed thereon. In addition, the phosphor 21 is formed below the meandering upper panel glass 20. Thereafter, the lower panel glass 10 and the upper panel glass 20 are combined to form a plasma discharge through space 30, mercury is injected between the plasma discharge through spaces 30, and the discharge through space 30 is formed. Produce surface light source by installing electrodes at both ends.

The reflective film reflects the light generated by the plasma discharge in front of the lamp, that is, the upper panel glass, thereby improving the efficiency of the surface light source. Alumina is used as a material of such a reflective film, and a large amount of predetermined impurities such as water are contained therein. Impurities contained in the reflective film in the surface light source, such as H ₂ O and mercury, react to generate HgO to invalidate mercury. Due to the mercury invalidation, the life of the surface light source is shortened, and the pinky discharge is generated due to the Ar discharge due to the lack of effective mercury, which acts as a major failure factor of the surface light source.

In order to solve this problem, far-infrared heating is performed in the manufacturing process of the reflective film to remove impurities to improve the above problem. That is, alumina was agitated in a liquid crystal state and applied to the lower panel glass by spraying, followed by far-infrared heating, drying and baking to form a reflective film. However, through this it is possible to significantly reduce the moisture in the reflective film, but there is a fundamental limitation that does not completely remove the moisture inside. Furthermore, even though the impurities in the surface light source are minimized through the far-infrared heating process, when the lamp is driven under the actual conditions of use of the LCD TV, the temperature rises due to the plasma discharge. The problem arises that it is ejected and deteriorates a surface light source.

Accordingly, the present invention was derived to solve the above problems, and by removing the reflective film in the surface light source to prevent the surface light source from deteriorating due to impurities in the reflective film, and also to reflect the reflection sheet on the lower surface of the surface light source or the lower surface of the backlight assembly It is an object of the present invention to provide a surface light source capable of improving the light efficiency of the surface light source, a backlight assembly including the same, and a display device having the same.

On the upper and lower panel glass according to the present invention, the discharge through space provided between the upper panel glass and the lower panel glass, phosphors formed on opposite surfaces of the upper and lower panel glass, on the rear panel glass It provides a surface light source including a reflection member provided.

Here, it is preferable to further include a sealing member sealed between the upper and lower panel glass to form the discharge through space, and a space dividing member for dividing the discharge through space into a plurality. It is preferable to use glass having the same coefficient of thermal expansion as the upper and lower panel glass substrates as the sealing member, and to use the flowable material or glass containing ceramic as the space dividing member.

The upper and lower panel glass may have a rectangular plate shape, and the upper panel glass may have a bent portion for forming the discharge through space.

It is preferable to use a reflecting sheet or a reflecting film as the reflecting member described above.

In the above, it is effective that at least one discharge gas of mercury, argon, neon, xenon and krypton is filled in the discharge through space.

In addition, according to the present invention, the upper panel glass and the lower panel glass and discharge through spaces provided therebetween, phosphors formed on opposite surfaces of the upper and lower panel glass, and a reflective member provided on the lower panel glass back surface are provided. It provides a backlight assembly comprising a surface light source including and a receiving member for receiving the surface light source.

In addition, a surface light source including an upper panel glass and the lower panel glass according to the present invention and a discharge through space provided therebetween, phosphors formed on opposite surfaces of the upper and lower panel glasses, and below the surface light source. Provided is a backlight assembly including a reflection member provided and an accommodation member accommodating the surface light source and the reflection member.

In the above, it is preferable to further include a fixing member for holding and fixing the surface light source.

The upper and lower panel glass may have a rectangular plate shape, and the upper panel glass may have a bent portion for forming the discharge through space.

Of course, it may further include a sealing member sealed between the upper and lower panel glass to form the discharge through space, and a space dividing member for dividing the discharge through space into a plurality.

Here, it is preferable to use a reflective sheet or a reflective film as the reflective member.

In the above, the reflective member may be provided on the bottom surface of the accommodation member or may be integrally formed with the bottom surface.

In this case, the optical sheet may be further provided on the surface light source.

In addition, a liquid crystal display panel for displaying an image according to the present invention, a backlight assembly for irradiating light to the liquid crystal display panel, and a housing member for accommodating the liquid crystal display panel and the backlight assembly, the backlight assembly is an upper portion And a surface light source including a panel glass, the lower panel glass, a discharge through space provided therebetween, phosphors formed on opposite surfaces of the upper and lower panel glasses, and a reflecting member provided on a rear surface of the lower panel glass. Provided is a liquid crystal display device.

In addition, a liquid crystal display panel for displaying an image according to the present invention, a backlight assembly for irradiating light to the liquid crystal display panel, and a housing member for accommodating the liquid crystal display panel and the backlight assembly, the backlight assembly is an upper portion A display device including a surface light source including a panel glass, the lower panel glass, discharge through spaces provided therebetween, and phosphors formed on opposite surfaces of the upper and lower panel glasses; and a reflective member provided below the surface light source. To provide.

The upper and lower panel glass described above has a rectangular plate shape, and the upper panel glass preferably has a bent portion for forming the discharge through space.

Of course, it may further include a sealing member sealed between the upper and lower panel glass to form the discharge through space, and a space dividing member for dividing the discharge through space into a plurality.

Here, it is effective to use a reflective sheet or a reflective film as the reflective member.

The optical sheet may further include an optical sheet provided between the liquid crystal display panel and the backlight assembly.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

In the drawings, the thickness of layers, films, panels, regions, etc., may be exaggerated for clarity, and like reference numerals designate like elements. Also, if a part such as a layer, film, region, plate, etc. is expressed above or on top of another part, each part is not just above or directly above another part but also another part between each part and another part. It also includes cases where there is

2 is an exploded perspective view of the surface light source according to the first embodiment of the present invention, Figure 3 is a cross-sectional view of the surface light source according to the first embodiment of the present invention.

2 and 3, the surface light source 100 according to the present exemplary embodiment may pass through discharges provided between the upper and lower panel glasses 110 and 120 and between the upper panel glass 110 and the lower panel glass 120. The space 130, phosphors 111 and 121 formed on opposite surfaces of the upper and lower panel glasses 110 and 120, and a reflective sheet 140 provided on the rear surface of the lower panel glass 120 are included.

Here, in the present embodiment, the upper panel glass 110 is preferably manufactured in a rectangular shape having a bent portion for forming the discharge through space 130. That is, as illustrated in the drawing, the upper plate glass 110 having the bent portion for forming the discharge through space 130 may be manufactured by molding the glass plate in a S-shaped shape having a single passage. The cross section has a continuous curvature, and the plane produces a meandering top panel glass 110.

The upper panel glass 110 may be manufactured by a molding mold method or by a molding method. Of course, the manufacturing of the upper panel glass 110 is not limited thereto, and may be manufactured by various methods, and the pattern of the upper panel glass 110, that is, the shape of the bent portion is not limited to the S-shape described above, It is possible to change the shape of the E-shaped having a lateral passage and mutually communicating the two sides of the cross-pipe having a side passage for communicating with each other.

In this way, the phosphor 111 is provided on the lower surface of the upper panel glass 110 having the bent portion for forming the discharge through space 130 connected by bending the glass plate. At this time, the fluorescent material 111 is a fluorescent material for changing the wavelength of the ultraviolet band emitted by mercury by the discharge to visible light, it is effective to use a fluorescent material that preferably excites the ultraviolet light to white.

The lower panel glass 120 is manufactured in a rectangular plate shape. In addition, a phosphor 121 is provided on an upper surface of the lower panel glass 120. In this case, the phosphor 121 uses the same material as a phosphor coated on the lower surface of the upper panel glass.

In the present exemplary embodiment, a reflective sheet 140 having a high light reflectance is provided on the lower surface of the lower panel glass 120. Through this, the direction of light irradiated in the lower direction of the lower panel glass 120 may be reflected upward, thereby minimizing light loss of the surface light source, thereby improving its brightness. In this case, the reflective sheet 140 may be attached to the lower surface of the lower panel glass 120 using a transparent adhesive, or the reflective sheet 140 may be attached to the lower panel glass 120 using an electrical principle such as static electricity. It can also be attached to the bottom surface.

In the present exemplary embodiment, the total reflection coating may be applied to the lower surface of the lower panel glass instead of the reflective sheet 140. In this way, the total reflection surface is provided on the lower surface of the lower panel glass 120, and the lower panel glass 120 becomes a mirror having the phosphor 121 coated on the upper surface thereof, so that light is irradiated onto the lower surface of the lower panel glass 120. Can also be reflected to the front.

In addition, in the surface light source 100 according to the present embodiment, it is preferable that electrodes (not shown) are provided at both ends of the discharge through space 130. In addition, it is preferable that a discharge gas containing mercury is provided in the discharge through space 130. In this case, a hot cathode electrode or a cold cathode electrode is used as the electrode, which may be provided inside and / or outside of both ends of the upper panel glass 110 and / or the lower panel glass 120. The discharge gas may include at least one of mercury, argon, neon, xenon, and krypton.

Hereinafter, a method of manufacturing the surface light source according to the present embodiment having the above-described structure will be described.

The upper plate glass 110 having the bent portion for forming the discharge through space 130 is formed by molding the glass plate. Thereafter, the phosphor 111 is coated on the lower surface of the upper panel glass 110. The lower panel glass 120 is provided, the phosphor 121 is coated on the upper surface of the lower panel glass 120, and the reflective sheet 140 is attached to the lower surface of the lower panel glass 120 to form a total reflection surface. It is preferable to burn off the foreign material in the fluorescent material by baking after applying the fluorescent material (111, 121).

As described above, the lower surface of the upper panel glass 110 to which the phosphors 111 and 121 are coated and the upper surface of the lower panel glass 120 are closed to face each other to form a discharge through space 130. At this time, the sealing of the upper panel glass 110 and the lower panel glass 120 may be sealed by sealing using a predetermined adhesive, and may be sealed by heating at a high temperature of a softening point or more. Of course, a material for sealing the upper and lower plates may be applied to a portion of the upper surface of the lower panel glass 120 before the sealing process. In this embodiment, the phosphor may be coated in the discharge through space 130 after sealing the upper and lower plates.

A discharge gas containing mercury is injected between the discharge through space 130 between the upper panel glass 110 and the lower panel glass 120. At this time, the liquid mercury may be injected, or may be injected in a gutter (gatter) type. Thereafter, a mercury diffusion process is performed to diffuse the mercury into the communication through-through space 130. At this time, it is effective to vacuum the inside of the discharge through space 130.

Thereafter, the upper panel glass 110 and the lower panel glass 120 are finally sealed to manufacture the surface light source 100. In the above description, the reflective sheet 140 is attached to the lower surface of the lower panel glass 120 before the sealing process of the upper panel 110 and the lower panel glass 120. However, the present invention is not limited thereto and the step of attaching the reflective sheet 140 to any one of the above-described processes may be performed. In addition, the upper panel glass 110 and the lower panel glass 120 may be finally sealed, and then the reflective sheet 140 may be attached to the lower surface of the lower panel glass 120.

In the surface light source manufactured as described above, electrons and mercury collide in the discharge through space by applying a high voltage electric field to the discharge through space, and the ultraviolet rays generated by the phosphor formed on the upper and lower panel glass are caused by the phosphor. It is excited to emit visible light. At this time, the visible light irradiated in the lower direction of the lower panel glass is reflected by the reflective sheet to move toward the upper panel glass direction, thereby improving luminous efficiency of the surface light source.

The surface light source according to the present invention is not limited to the above-described structure and can be modified in various forms. That is, a discharge through space may be provided between the upper panel glass and the lower panel glass through the space dividing member.

Hereinafter, a surface light source according to a second embodiment of the present invention having a space dividing member will be described. Descriptions overlapping with the above-described embodiments will be omitted.

4 is an exploded perspective view of a surface light source according to a second embodiment of the present invention, and FIG. 5 is a cross-sectional view of the surface light source according to a second embodiment of the present invention.

4 and 5, the surface light source 100 according to the present embodiment includes upper and lower panel glasses 110 and 120 provided with phosphors 111 and 121 on surfaces facing each other, and the upper and lower panels. A sealing member 150 for forming a discharge through space 130 sealed between the glasses 110 and 120, a space dividing member 131 for dividing the discharge through space 130 into a plurality, and the lower panel glass 120 includes a reflective sheet 140 provided on the bottom surface.

The upper and lower panel glasses 110 and 120 are formed in a rectangular plate shape, the phosphor 111 is formed on the lower surface of the upper panel glass 110, and the phosphor 121 is formed on the upper surface of the lower panel glass 120. ) Is formed.

The sealing member 150 is provided along the edges of the upper and lower panel glass substrates 110 and 120 and preferably uses a material having the same thermal expansion coefficient as the upper and lower panel glass substrates 110 and 120. Do. In this case, glass may be used as the material.

The space dividing member 131 is provided between the upper and lower panel glasses 110 and 120 inside the sealing member 150 to divide the discharge through space 130 or separate the discharge through space 130 respectively. It may be formed. That is, the sealing space provided by the sealing member 150 may be divided into regions separated from each other by the space dividing member 131, or they may be divided into spaces in communication with each other. Such a space dividing member 131 can be produced by heat-curing a flowable material containing a ceramic or the like, and glass can also be used.

The electrode 160 for applying the discharge voltage to the discharge through space 130 is preferably formed on the outer surface of the surface light source. In the drawing, the electrode 160 is disposed on the upper side of the upper panel glass 110, that is, at both end regions of the space dividing member 130, respectively.

In the present exemplary embodiment, the reflective member including the reflective sheet 140 is provided on the lower surface of the lower panel glass 120, that is, the lower surface of the surface light source 100. In this case, the reflective member may be formed on the lower surface of the lower panel glass. As described above, the reflective sheet 140 may be manufactured using a material having 80% or more of the reflectance of light to reflect the light irradiated to the lower surface of the lower panel glass 120 upward.

The manufacturing method of the surface light source of the above-mentioned structure is as follows.

Phosphors 111 and 121 are formed on the upper panel glass 110 and the lower panel glass 120, respectively, and the reflective sheet 140 is attached to the lower surface of the lower panel glass 120. Thereafter, the space dividing member 131 is disposed on the upper panel glass 110 or the lower panel glass 120, and then the upper panel glass 110 and the lower panel glass 120 are encapsulated using the sealing member 150. do. In this case, the adhesive may be sealed using an adhesive, and the upper and lower panel glasses 110 and 120 and the sealing member 150 may be sealed by heating. As a result, a discharge through space 130 is provided between the upper panel glass 110 and the lower panel glass 120. Next, the discharge gas is injected into the discharge through space 130, diffused, and finally sealed to manufacture the surface light source 100.

The reflective sheet attached to the lower surface of the lower panel glass 120 may be attached after the sealing of the upper panel glass 110 and the lower panel glass 120, or may be attached after the discharge gas injection. It can also be attached after the final closure process.

In the surface light source 100 as described above, the reflection film which is an impurity generation source is removed therein to prevent deterioration of mercury injected into the discharge through space 130 inside the surface light source 100, thereby reducing the efficiency of the surface light source 100. It is possible to improve, and to provide a reflecting member on the lower surface of the surface light source 100 can guide the light irradiated to the lower portion of the surface light source 100 in the upper direction can improve the light efficiency.

Hereinafter, a backlight assembly using the above-described surface light source will be described.

6 and 7 are cross-sectional views of a backlight assembly according to a third embodiment of the present invention.

6 and 7, the backlight assembly 2000 according to the present exemplary embodiment includes a surface light source 100 having a reflection member disposed on a lower surface thereof, and a lower housing member 200 accommodating the surface light source 100. do.

The lower accommodating member 200 is formed in a box shape of a rectangular parallelepiped with an open upper surface, and an accommodating space having a predetermined depth is formed therein. The lower accommodating member 200 includes a bottom surface and sidewalls which protrude vertically at each edge from the bottom surface. It is preferable that a lamp holder 210 is provided between the bottom surface of the lower housing member 200 and the surface light source 100 to fix and support the surface light source 100. At this time, the lamp holder 210 may be provided around the edge of the bottom surface of the lower housing member 200 in the form of a square frame, a plurality of fixed frame shape having a bottom surface and a side wall surface of the lower housing member 200. It may be provided in four vertex areas of the bottom surface. Of course, the shape of the lamp holder 210 is not limited to the above description is possible various modifications. A part of the lamp holder 210 may be provided with a separate power plug or power terminal connected to the electrode of the surface light source 100. Of course, a part of the lower housing member 200 may be provided with a power plug or a power terminal. In addition, the lamp holder 210 may further include a separate fixing means for supporting and fixing the surface light source 100. Of course, the surface light source 100 may be directly mounted in the lower accommodating member 200 without using the lamp holder 210.

The surface light source 100 is in close contact with the upper and lower panel glass 120 and the upper panel glass 110 and the lower panel glass 120 to form a discharge through space 130 in close contact with each other as described above. Phosphors 111 and 121 formed on the opposing surface and a reflecting member including a reflective sheet 140 on the lower surface thereof. The apparatus may further include a space dividing member 131 and a sealing member 150 between the upper and lower panel glasses 110 and 120.

The surface light source 100 of the backlight assembly according to the present exemplary embodiment may be manufactured in a rectangular plate shape to uniformly supply light to the front surface thereof. In this embodiment, an optical sheet (not shown) may be disposed on the surface light source 100 to improve light efficiency. That is, the efficiency of light emitted from the surface light source 100 may be improved by using a diffusion sheet or a brightness enhancement sheet.

As described above, in the present embodiment, the surface light source can be accommodated and supported in the lower accommodating member, and the reflecting member is included on the lower surface of the surface light source to reflect the light reflected to the upper surface of the backlight assembly. have.

Of course, the backlight assembly according to the present invention is not limited to the above description, and the reflective member provided on the lower surface of the surface light source may be provided in the area below the surface light source. Hereinafter, a backlight assembly according to a fourth exemplary embodiment of the present invention in which a reflective member reflecting light of a surface light source is provided in a lower region of the surface light source. Descriptions overlapping with the above-described embodiments will be omitted.

8 is a cross-sectional view of a backlight assembly according to a fourth embodiment of the present invention.

Referring to FIG. 8, the backlight assembly according to the present exemplary embodiment includes a surface light source 100 that emits light to the top and bottom surfaces, and a reflective member 220 that reflects light from the surface light source 100 to the top surface. And a lower accommodating member 200 accommodating the reflective member 220 and the surface light source 100. In addition, the lower housing member 200 further includes a lamp holder 210 for supporting the surface light source 100.

The surface light source 100 is in close contact with each other to form the upper and lower panel glass (110, 120) to form a discharge through space 130, and the phosphor 111, the inner surface of the discharge through space 130 121). The discharge through space 130 may be formed by bending the upper panel glass 110, or may be formed using a separate space dividing member 131 and a sealing member 150. In addition, a plurality of discharge gas is provided in the discharge through space 130, and further includes an electrode for applying discharge power to the discharge through space 130 provided with the discharge gas. When the power is applied to the electrode through this, electrons in the discharge through space 130 collide with the discharge gas to generate ultraviolet rays, which are excited by the phosphors 111 and 121 inside the discharge through space 130. Thus, visible light is emitted. In this case, the light emitted through the surface light source 100 according to the present embodiment emits light to the upper and lower regions of the surface light source 100.

In the present embodiment, a reflective member 220 such as a separate reflective sheet for reflecting light emitted to the lower region of the surface light source 100 to the upper region is provided in the lower region of the surface light source 100. Preferably, as shown in the figure, it is preferable to arrange the reflective sheet on the bottom surface of the lower accommodating member 200 to reflect the light emitted to the lower region of the surface light source 100 to guide the light upward. In this case, a reflective film may be formed on the bottom surface of the lower accommodating member 200 instead of the reflective sheet. In addition, a reflective sheet may be disposed in an area between the lamp holder 210 and the surface light source 100.

Hereinafter, a display device including the above-described backlight assembly will be described.

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

Referring to FIG. 9, the liquid crystal display according to the present exemplary embodiment includes a display assembly 1000 disposed above and a backlight assembly 2000 disposed below.

 The display assembly 1000 includes a liquid crystal display panel 400, driving circuit units 500 (500a and 500b) and an upper accommodating member 300.

The liquid crystal display panel 400 includes a color filter substrate 410 and a thin firm transistor (TFT) substrate 420. At this time, the color filter substrate 410 is a substrate in which RGB pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process. A common electrode made of a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO) is coated on the front surface of the color filter substrate 410. The TFT substrate 420 is a transparent glass substrate on which TFTs in matrix form are formed. The data line is connected to the source terminal of the TFTs, and the gate line is connected to the gate terminal. In addition, a pixel electrode made of a transparent electrode made of a transparent conductive material is formed in the drain terminal. When an electrical signal is input to the data line and the gate line, each TFT is turned on or turned off to apply an electrical signal necessary for pixel formation of the drain terminal. When the TFT is turned on by applying power to the gate terminal and the source terminal of the TFT substrate 420, an electric field is formed between the pixel electrode and the common electrode of the color filter substrate 410, thereby forming the TFT substrate 420 and the color. The arrangement of the liquid crystals injected between the filter substrates 410 is changed, and the light transmittance is changed according to the changed arrangement to obtain a desired image.

The driving circuit unit 500 connected to the liquid crystal display panel 400 includes a control IC (integrated circuit) and a data side printed circuit board 510a for applying a predetermined data signal to a data line of the TFT substrate 420. And a gate side printed circuit board 510b for mounting a control IC and applying a predetermined gate signal to a gate line of the TFT substrate 420, and a TFT substrate 420 and a data side printed circuit having an exposed ground pattern. A data side flexible printed circuit board 530a for connecting between the substrate 510a and a gate side flexible printed circuit for connecting between the TFT substrate 420 and the gate side printed circuit board 510b with an exposed ground pattern. The substrate 530a is included.

The data side and gate side printed circuit boards 510a and 510b are connected to the data side and gate side flexible printed circuit boards 530a and 530b to apply external image signals and gate driving signals. The data side and gate side printed circuit boards 510a and 510b may be integrated into one printed circuit board and connected to one side of the liquid crystal display panel 100. Of course, the data line and the gate line of the TFT substrate 420 may be exposed to one side.

The data side and gate side flexible printed circuit boards 530a and 530b are respectively connected to the data line and the gate line of the TFT substrate 420 to apply the data driving signal and the gate driving signal to the thin film transistor. In addition, the flexible printed circuit board 530 is equipped with a tap (TAB) IC, and includes RGB (Read, Green, Blue) signals, Shift Start Clock (SSC) signals, and LP (Latch) generated from the printed circuit board 510. Pulse) signal, gamma analog ground signal, digital ground signal, digital power supply, analog power supply common voltage, accumulated voltage and the like are transmitted to the liquid crystal display panel 400. Of course, an IC may be mounted on the TFT substrate 420.

The upper accommodating member 300 is bent at a right angle to protect the liquid crystal display panel 400 or the backlight assembly 2000 from being easily broken by an impact applied from the outside while preventing the components of the display assembly 1000 from being separated. It is manufactured in the form of a square frame having a flat portion and a side wall portion. In this case, the planar portion of the upper accommodating member 300 supports a portion of the edge of the liquid crystal display panel 400 at the lower portion thereof, and the sidewall portion is coupled to face the sidewalls of the lower accommodating member 200. The upper accommodating member 300 and the lower accommodating member 200 are preferably manufactured using metal having excellent strength, light weight, and low deformation.

Next, the backlight assembly 2000 includes a surface light source 100 and a lower accommodating member 200 for accommodating the surface light source 100. In this case, the method further includes a reflecting member 220 including a reflecting sheet 140 provided in a lower region of the surface light source 100.

In this case, the surface light source 100 may include upper and lower panel glasses 110 and 120, discharge through spaces 130 provided between the upper and lower panel glasses 110 and 120, and the discharge through spaces 130. Phosphors 111 and 121 coated on the inner side of the substrate. In addition, the surface light source 100 is sealed between the upper and lower panel glass (110, 120) and the upper and lower panel glass (110, 120) provided with phosphors 111 and 121 on the surface facing each other. A sealing member 150 forming the discharge through space 130, and a space dividing member 131 for dividing the discharge through space 130 into a plurality. The above-described surface light source 100 may further include a reflective sheet 140 provided at a lower area thereof, that is, a rear surface of the lower panel glass 120.

As described above, the liquid crystal display according to the present embodiment can prevent deterioration of the surface light source by removing the reflection film in the surface light source, and provide a reflecting member in the lower region of the surface light source so that the light irradiated below the surface light source is upper. Can be reflected to reduce light loss.

Although the invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the invention is not limited thereto, but is defined by the claims that follow. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the spirit of the following claims.

As described above, the present invention can prevent the surface light source from being degraded by the reflective film by removing the reflective film in the surface light source.

In addition, by providing reflecting members on the lower surface and the lower region of the surface light source from which the reflection film is removed, the light efficiency of the surface light source can be improved.

Claims (20)

Upper and lower panel glass; A discharge through space provided between the upper panel glass and the lower panel glass; Phosphors formed on opposite surfaces of the upper and lower panel glasses; And a reflective member provided on the bottom surface of the lower panel glass. The method according to claim 1, A sealing member sealed between the upper and lower panel glasses to form the discharge through space; And a space dividing member for dividing the discharge through space into a plurality. The method according to claim 1, A surface light source using glass having the same coefficient of thermal expansion as the upper and lower panel glass substrates as the sealing member, and using a flowable material or glass comprising ceramic as the space dividing member. The method according to claim 1, And the upper and lower panel glasses have a rectangular plate shape, and the upper panel glass has a bent portion for forming the discharge through space. The method according to claim 1, A surface light source using a reflection sheet or a reflection film as said reflection member. The method according to claim 1, Surface light source filled with at least one discharge gas of mercury, argon, neon, xenon and krypton in the discharge through space. A surface light source including an upper panel glass and the lower panel glass and discharge through spaces provided between the upper panel glass and the lower panel glass, phosphors formed on opposite surfaces of the upper and lower panel glasses, and a reflecting member provided on a rear surface of the lower panel glass; And a receiving member accommodating the surface light source. A surface light source including upper panel glass and lower panel glass, discharge through spaces provided therebetween, and phosphors formed on opposite surfaces of the upper and lower panel glasses; A reflection member provided below the surface light source; And an accommodation member accommodating the surface light source and the reflective member. The method according to claim 7 or 8, And a fixing member for supporting and fixing the surface light source. The method according to claim 7 or 8, The upper and lower panel glass has a rectangular plate shape, and the upper panel glass has a bent portion for forming the discharge through space. The method according to claim 7 or 8, A sealing member sealed between the upper and lower panel glasses to form the discharge through space; And a space dividing member for dividing the discharge through space into a plurality. The method according to claim 7 or 8, And a reflective sheet or a reflective film as the reflective member. The method according to claim 8, The reflective member is provided on the bottom surface of the housing member or integrally formed with the bottom surface. The method according to claim 7 or 8, The backlight assembly further comprises an optical sheet provided on the surface light source. A liquid crystal display panel which displays an image; A backlight assembly radiating light onto the liquid crystal display panel; A housing member accommodating the liquid crystal display panel and the backlight assembly; The backlight assembly includes an upper panel glass and the lower panel glass, discharge through spaces provided therebetween, phosphors formed on opposite surfaces of the upper and lower panel glasses, and a reflecting member provided on a lower surface of the lower panel glass. Display device including a surface light source. A liquid crystal display panel which displays an image; A backlight assembly radiating light onto the liquid crystal display panel; A housing member accommodating the liquid crystal display panel and the backlight assembly; The backlight assembly may include a surface light source including an upper panel glass and the lower panel glass, discharge through spaces provided therebetween, and phosphors formed on opposite surfaces of the upper and lower panel glasses, and a reflective member provided below the surface light source. Display device comprising a. The method according to claim 15 or 16, The upper and lower panel glasses have a rectangular plate shape, and the upper panel glass has a bent portion for forming the discharge through space. The method according to claim 15 or 16, A sealing member sealed between the upper and lower panel glasses to form the discharge through space; And a space dividing member for dividing the discharge through space into a plurality. The method according to claim 15 or 16, A display device using a reflective sheet or a reflective film as the reflective member. The method according to claim 15 or 16, And an optical sheet provided between the liquid crystal display panel and the backlight assembly.

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