KR101001990B1 - Liquid crystal display module - Google Patents

Abstract

The present invention relates to a liquid crystal display module that can reduce production costs and improve productivity.

According to an exemplary embodiment of the present invention, a liquid crystal display module includes: a guide panel for supporting a liquid crystal display panel, a lamp for irradiating light to the liquid crystal display panel, a light guide plate for guiding light emitted from the lamp toward the liquid crystal display panel; A reflective sheet bent in a "c" shape to surround the back of the light guide plate and the lamp, a support main on which the lamp, the light guide plate and the reflective sheet are seated, and a protrusion disposed to surround the support main and supporting the guide panel. And a bottom cover having a plurality of elongated portions for pressing the upper side of the reflective sheet, and a plurality of optical sheets stacked between the light guide plate and the liquid crystal display panel to partially overlap the upper side of the reflective sheet. It is done.

By such a configuration, the liquid crystal display module according to the embodiment of the present invention can prevent the reflection sheet from being restored to its original state by pressing the reflection sheet bent into a plurality of extension portions bent in a "b" shape. The liquid crystal display module according to the embodiment of the present invention can reduce the production cost of the liquid crystal display module, and can simplify the assembly process to improve productivity of the liquid crystal display module.

Description

Liquid Crystal Display Module {LIQUID CRYSTAL DISPLAY MODULE}

1 is a perspective view illustrating a general liquid crystal display module.

FIG. 2 is a cross-sectional view of the liquid crystal display module shown in FIG. 1 taken along line II ′. FIG.

3 is a cross-sectional view showing a defect caused by the restoring force of the reflective sheet.

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

FIG. 5 is a cross-sectional view of the liquid crystal display module illustrated in FIG. 4 taken along the line II-II ′.

6 is a plan view illustrating a backlight unit of a liquid crystal display module according to an exemplary embodiment of the present invention.

7 is a perspective view illustrating a liquid crystal display module in which a light source is disposed on multiple sides of the light guide plate.

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

1,100,200: liquid crystal display module 2,102: top case

3,103: Lower substrate 4,104: Guide panel

5,105: upper substrate 6,106: liquid crystal display panel                 

7,107: seating surface 8,108: optical sheet

10,110: light guide plate 12,112: reflective sheet

13, 113, 130: extension 14,114: support main

18,118: bottom cover 20,120,220: lamp

30: adhesive double-sided tape 135: protrusion

140: home

The present invention relates to a liquid crystal display module, and more particularly, to a liquid crystal display module that can reduce production costs and improve productivity.

In general, liquid crystal display (Liquid Crystal Display) due to the characteristics of light weight, thin, low power consumption, etc., the application range is gradually increasing. In accordance with this trend, droplet display devices are used in office automation equipment, audio / video equipment, and the like. On the other hand, the liquid crystal display device displays the desired image on the screen by adjusting the transmission amount of the light beam according to image signals applied to the plurality of control switches arranged in a matrix form.

A general liquid crystal display device is composed of a liquid crystal display module and a driving circuit portion for driving the liquid crystal display module.                         

The liquid crystal display module includes a liquid crystal display panel in which liquid crystal cells are arranged in a matrix form between two glass substrates, and a backlight unit that irradiates light to the liquid crystal display panel. In addition, in the liquid crystal display module, optical sheets for vertically raising light traveling from the backlight unit toward the liquid crystal display panel are arranged. The liquid crystal display panel, the backlight unit and the optical sheet should be fastened in an integrated form to prevent light loss and should be protected from damage by external impact. To this end, a case for a liquid crystal display device formed to surround the backlight unit and the optical sheets including the edge of the liquid crystal display panel is provided. Since the liquid crystal display module is not a self-luminous display device, a light source such as a backlight is required. There are two types of backlight of the liquid crystal display module, a direct type type and an edge type type.

In the direct type, a light source is placed on the rear surface of the liquid crystal display panel so as to directly illuminate the front of the liquid crystal display panel, so that the luminance can be increased by arranging a plurality of light sources, but the thickness of the backlight unit is increased. On the other hand, in the edge type, a fluorescent lamp is installed outside the light guide plate, and light is incident on the entire surface of the liquid crystal display panel by using a transparent light guide plate from the fluorescent lamp. There is an advantage that the thickness of the unit can be made thin.

FIG. 1 is a perspective view illustrating a general liquid crystal display module, and FIG. 2 is a cross-sectional view of the liquid crystal display module shown in FIG. 1 taken along line II ′.

1 and 2, a general liquid crystal display module 1 includes a bottom cover 18 and a support main 14, a backlight unit stacked inside the support main 14, and a liquid crystal display panel 6. ) And a top case (2) for wrapping the edge of the liquid crystal display panel (6) and the side surface of the guide panel (4).

The liquid crystal display panel 6 includes a spacer (not shown) for injecting liquid crystal between the upper substrate 5 and the lower substrate 3 and maintaining a constant gap between the upper substrate 5 and the lower substrate 3. do. The upper substrate 5 of the liquid crystal display panel 6 is formed with a color filter, a common electrode, a black matrix, and the like, which are not shown. In addition, signal wirings such as data lines and gate lines (not shown) are formed on the lower substrate 3 of the liquid crystal display panel 6, and thin film transistors (“TFTs” below) are formed at the intersections of the data lines and the gate lines. "Is formed. The TFT switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the scan signal (gate pulse) from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line. In addition, a tape carrier (not shown) is formed at one side of the lower substrate 3 to which data lines and gate lines are respectively connected, and a driver integrated circuit for applying a driving signal to the TFT is mounted therein. The package (Tape Carrier Package) is attached. This tape carrier package supplies the data signal from the driver integrated circuit to the data lines. The scan signal is also supplied to the gate lines.

The upper polarizing sheet is attached to the upper substrate 5 of the liquid crystal display panel 6, and the lower polarizing sheet is attached to the rear surface of the lower substrate 3.

The guide panel 4 supports the liquid crystal display panel 6 and is mounted on the top surface of the bottom cover 18 to fix the optical sheets 8. To this end, the inner side of the guide panel 4 has a mounting portion 7 on which the liquid crystal display panel 6 is mounted.

The support main 14 is a mold, and the side wall surface thereof is formed into a stepped stepped surface, and the stepped surface is provided with a mounting portion on which the backlight unit is mounted. Inside the support main 14, a backlight unit for irradiating light to the liquid crystal display panel 6 is stacked.

The backlight unit includes a lamp 20 for irradiating light to the liquid crystal display panel 6, a light guide plate 10 for diffusing light incident from the lamp 20 to the liquid crystal display panel 6, and a light guide plate 10. ) And a plurality of optical sheets 8 stacked on the light guide plate 10.

The lamp 20 is mainly used a cold cathode fluorescent lamp, the lamp 20 is composed of a glass tube, a cathode and an anode provided at both ends of the glass tube. Inert gas is filled in the glass tube, and phosphor is coated on the inner wall of the glass tube. The lamp 20 is disposed on the side of the light guide plate 10 and the light generated by the lamp 20 is incident on the light guide plate 10.

The light guide plate 10 converts line light incident from the lamp 20 into surface light and guides the light to the liquid crystal display panel 6. The lower surface of the light guide plate 10 is provided with a printed pattern so that the light beam passing through the light incident portion is reflected at a predetermined inclination angle from the rear surface which is the inclined surface and proceeds uniformly toward the exit surface.

The reflective sheet 12 is disposed to surround the back surface of the light guide plate 10 and the lamp 20. That is, the reflective sheet 12 has a surface disposed on the rear surface of the light guide plate 10 and an elongation portion 13 extending from this surface. The extension part 13 is bent in a "c" shape to surround the lamp 20. The reflective sheet 12 is formed of a material that reflects light, and reflects the light traveling toward the rear and side surfaces of the lamp 20 toward the liquid crystal display panel 6 to improve the efficiency of light irradiated onto the liquid crystal display panel 6. Let's do it.

Light emitted through the light guide plate 10 is incident on the liquid crystal display panel 6 via the plurality of optical sheets 8. When the light incident on the liquid crystal display panel 6 is vertical, the light efficiency is increased. To this end, a plurality of optical sheets 8 are disposed on the light guide plate 10.

The plurality of optical sheets 8 generates light emitted from the light guide plate 10 vertically to improve light efficiency. To this end, the first and second prisms which vertically raise the propagation angle of the light diffused from the light guide plate 10 to the entire region and the propagation angle of the light diffused by the bottom diffusion sheet perpendicular to the liquid crystal display panel 6. And a top diffusion sheet for diffusing light via the sheet and the first and second prism sheets. Accordingly, the light emitted from the light guide plate 10 is incident on the liquid crystal display panel 6 via the plurality of optical sheets 8.

The bottom cover 18 is disposed to surround the support main 14 and has a bottom surface of the support main 14 and a surface extended and bent from the bottom surface. The bent surface of the bottom cover 18 supports the guide panel 4 as well as guide the side of the reflective sheet 12 bent in a "c" shape to reflect light directed toward the side of the lamp 20. . This bottom cover 18 is fastened to the support main 14 by screws (not shown).

The top case 2 is manufactured in the form of a square strip having a flat portion and a side portion bent at a right angle. The top case 2 surrounds the edge of the liquid crystal display panel 6 and one side of the guide panel 4. The guide panel 4 and the top gate 2 are fastened by screws not shown.

As described above, the general liquid crystal display module 1 forms a shape of the extension portion 13 of the reflective sheet 12 so as to reflect the light traveling toward the side of the lamp 20 toward the liquid crystal display panel 6. By bending to wrap the lamp 20. Placing the optical sheets 8 on the extension 13 of the reflective sheet 12 bent in the "c" shape, as shown in Figure 3, bent in the "c" shape of the reflective sheet 12 As the stretched portion 13 is restored to its original state, the optical sheets 8 are lifted by pushing the optical sheets 8, thereby causing a defect in the liquid crystal display module. In order to prevent the occurrence of such defects, as shown in FIG. 2, a portion where the upper surface of the light guide plate 10 and the reflective sheet 12 overlap is bonded using the double-sided adhesive tape 30. This double-sided adhesive tape 30 is used to prevent the reflective sheet 12 from being restored to its original state, thereby preventing the optical sheets 8 from being lifted up. However, there is a problem in that the production cost of the liquid crystal display module increases because a separate double-sided adhesive tape 30 is needed to prevent the reflective sheet 12 from being restored to its original state. In addition, since the process of attaching the double-sided adhesive tape 30 when assembling the liquid crystal display module is added, there is a problem that productivity of the liquid crystal display module is lowered.

Accordingly, an object of the present invention is to provide a liquid crystal display module that can reduce the production cost and improve productivity.

In order to achieve the above object, a liquid crystal display module according to an embodiment of the present invention is a guide panel for supporting a liquid crystal display panel, a lamp for irradiating light to the liquid crystal display panel, and the light irradiated from the lamp to the liquid crystal display A light guide plate guiding toward the panel, a reflective sheet bent in a "c" shape to surround the light guide plate and the back surface of the light guide plate, a support main to which the lamp, the light guide plate and the reflective sheet are seated, and the support main A bottom cover including a protrusion for supporting the guide panel and a plurality of extension parts for pressing the upper side of the reflective sheet, and a plurality of stacked between the light guide plate and the liquid crystal display panel to partially overlap the upper side of the reflective sheet. And optical sheets.

The plurality of extension parts of the liquid crystal display module according to an embodiment of the present invention is characterized in that the extension from the protrusion.

The plurality of extension parts of the liquid crystal display module according to an embodiment of the present invention is characterized in that the bent in the form "".

The lamp of the liquid crystal display module according to an embodiment of the present invention is characterized in that disposed on one side of the light guide plate.

The lamp of the liquid crystal display module according to an embodiment of the present invention is characterized in that it is disposed on the multi-sided surface of the light guide plate.
The liquid crystal display module according to the embodiment of the present invention further includes a plurality of optical sheets stacked between the light guide plate and the liquid crystal display panel; The optical sheets may have grooves formed in portions corresponding to the stretched portions so as not to overlap the stretched portions.

Other objects and features of the present invention in addition to the above objects will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, a liquid crystal display module according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 4 to 6.

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

Referring to FIG. 4, the liquid crystal display module 100 according to the exemplary embodiment may include a bottom cover 118 and a support main 114, a backlight unit stacked inside the support main 114, and a liquid crystal display panel. A guide panel 104 on which the 106 is stacked, and a top case 102 for enclosing the edge of the liquid crystal display panel 106 and the side surface of the guide panel 104 are provided.

The liquid crystal display panel 106 includes a spacer (not shown) for injecting liquid crystal between the upper substrate 105 and the lower substrate 103 and for maintaining a constant gap between the upper substrate 105 and the lower substrate 103. do. The upper substrate 105 of the liquid crystal display panel 106 includes a color filter, a common electrode, a black matrix, and the like, which are not shown. In addition, signal wirings such as data lines and gate lines (not shown) are formed on the lower substrate 103 of the liquid crystal display panel 106, and TFTs are formed at intersections of the data lines and the gate lines. The TFT switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the scan signal (gate pulse) from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line. In addition, one side of the lower substrate 103 is formed with a pad region to which data lines and gate lines are respectively connected, and a tape not shown in which a driver integrated circuit for applying a driving signal to a TFT is mounted on the pad region. A carrier package is attached. This tape carrier package supplies the data signal from the driver integrated circuit to the data lines. The scan signal is also supplied to the gate lines.

The upper polarizing sheet is attached to the upper substrate 105 of the liquid crystal display panel 106, and the lower polarizing sheet is attached to the rear surface of the lower substrate 103.

As illustrated in FIG. 5, the guide panel 104 is formed in a “┫” shape to support the liquid crystal display panel 106 and is seated on an upper surface of the protrusion 135 of the bottom cover 118. In order to support the liquid crystal display panel 106, a mounting portion 107 on which the liquid crystal display panel 106 is seated is formed on an inner side surface of the guide panel 104.

The support main 114 is a mold, and the side wall surface thereof is formed into a stepped stepped surface, and a seating portion on which the backlight unit is mounted is formed on the stepped surface. Inside the support main 114, a backlight unit for irradiating light to the liquid crystal display panel 106 is stacked.

The backlight unit includes a lamp 120 for irradiating light to the liquid crystal display panel 106, a light guide plate 110 for diffusing light incident from the lamp 120 to the liquid crystal display panel 106, and a light guide plate 110. ) And a plurality of optical sheets 108 stacked on the light guide plate 110.

The lamp 120 is mainly used a cold cathode fluorescent lamp, the lamp 120 is composed of a glass tube, a cathode and an anode installed at both ends of the glass tube. Inert gas is filled in the glass tube, and phosphor is coated on the inner wall of the glass tube. The lamp 120 is disposed on the side of the light guide plate 110, and the light generated by the lamp 120 is incident on the light guide plate 110.

The light guide plate 110 converts line light incident from the lamp 120 into surface light and guides the light to the liquid crystal display panel 106. A printed pattern is provided on the lower surface of the light guide plate 110 so that the light beams passing through the light incident part are reflected at a predetermined inclination angle from the rear surface of the inclined surface to be uniformly directed toward the exit surface.

The reflective sheet 112 is disposed to surround the back surface of the light guide plate 110 and the lamp 120. That is, the reflective sheet 112 has a surface disposed on the rear surface of the light guide plate 110 and an elongation portion 113 extended from the surface. The extension part 113 is bent in a "c" shape to surround the lamp 120. The reflective sheet 112 is formed of a material that reflects light, and reflects the light traveling toward the rear and side surfaces of the lamp 120 toward the liquid crystal display panel 106 to improve the efficiency of light irradiated onto the liquid crystal display panel 106. Let's do it.

Light emitted through the light guide plate 110 is incident on the liquid crystal display panel 106 via the plurality of optical sheets 108. When the light incident on the liquid crystal display panel 106 is vertical, the light efficiency is increased. To this end, a plurality of optical sheets 108 are disposed on the light guide plate 110.

The plurality of optical sheets 108 generates light emitted from the light guide plate 110 vertically to improve light efficiency. To this end, the first and second prisms which vertically raise the propagation angle of the light diffused from the light guide plate 110 to the entire area and the propagation angle of the light diffused by the bottom diffusion sheet perpendicular to the liquid crystal display panel 106. And a top diffusion sheet for diffusing light via the sheet and the first and second prism sheets. Accordingly, the light emitted from the light guide plate 110 is incident on the liquid crystal display panel 106 via the plurality of optical sheets 108.

The bottom cover 118 is disposed to surround the support main 114, and a bottom surface of the support main 114, a protrusion 135 bent and extended from the bottom surface, and an extension and bending of the support main 114. It is provided with a plurality of extensions 130.

The bent side of the bottom cover 118 guides the side of the reflective sheet 112 that is bent in a "c" shape to reflect light directed toward the side of the lamp 120, and the protrusion 135 guides the guide panel 104. ), And the plurality of extension parts 130 are bent in a "b" shape. The bottom cover 118 is fastened to the support main 114 by screws (not shown).

The top case 102 is manufactured in the form of a square strip having a flat portion and a side portion bent at a right angle. The top case 102 surrounds the edge of the liquid crystal display panel 106 and one side of the guide panel 104. Guide panel 104 and top case 102 are fastened by screws (not shown).

FIG. 5 is a cross-sectional view of the liquid crystal display module illustrated in FIG. 4 taken along the line II-II ′.

Referring to FIG. 5, in the liquid crystal display module 100 according to the exemplary embodiment of the present invention, a reflective sheet 112, a light guide plate 110, and a lamp 120 are disposed in the support main 114, and a bottom cover is provided. 118 is arranged to surround the support main 114. The plurality of extension parts 130 formed on the bottom cover 118 are bent in a "a" shape. The plurality of extension parts 130 that are bent in the "a" shape pressurize the upper side of the reflective sheet 112 that is bent in the "c" shape to prevent the reflective sheet 112 from being restored to its original state.

The liquid crystal display module 100 according to the exemplary embodiment of the present invention is formed on the bottom cover 118 and has a lamp without a double-sided adhesive tape applied to a general liquid crystal display module through a plurality of extension parts 130 that are bent in a "B" shape. It is possible to prevent the reflective sheet bent in a "c" shape to surround the 120 to be restored to its original state. The liquid crystal display module 100 according to the embodiment of the present invention can reduce the production cost of the liquid crystal display module by removing the double-sided adhesive tape, and can simplify the assembly process to improve the productivity of the liquid crystal display module.

As shown in FIG. 6, the optical sheet 108 of the liquid crystal display module 100 according to the exemplary embodiment of the present invention corresponds to the extension part 130 of the bottom cover 118 that is bent in a "b" shape. The groove 140 is formed in the groove. The groove 140 is formed to prevent the extension 130 and the optical sheets 108, which are bent in the form of "a", from overlapping.

Although the lamp 120 is described as having the light guide plate 110 disposed on one side, as illustrated in FIG. 7, one lamp 220 may be disposed on multiple side surfaces of the light guide plate 110. In addition, a plurality of lamps may be disposed on the side surfaces of the light guide plate 110.

As described above, the liquid crystal display module according to the exemplary embodiment of the present invention forms a plurality of extension parts in the bottom cover, and the extension parts are bent in a "b" shape to press the upper side of the reflective sheet bent in a "c" shape. . It is possible to prevent the reflective sheet from being restored to its original state without the double-sided adhesive tape applied to the general liquid crystal display module through the extension part bent in the form of "a".

The liquid crystal display module according to the embodiment of the present invention can reduce the production cost of the liquid crystal display module by removing the double-sided adhesive tape applied to the general liquid crystal display module, and can simplify the assembly process to improve the productivity of the liquid crystal display module. have.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (6)

A guide panel for supporting the liquid crystal display panel, A lamp for irradiating light onto the liquid crystal display panel; A light guide plate for guiding light emitted from the lamp toward the liquid crystal display panel; A reflective sheet bent in a "c" shape to surround the back surface of the light guide plate and the lamp, A support main on which the lamp, the light guide plate, and the reflective sheet are seated; A bottom cover disposed to surround the support main and having a protrusion for supporting the guide panel and a plurality of extension parts for pressing the upper side of the reflective sheet; And a plurality of optical sheets stacked between the light guide plate and the liquid crystal display panel to partially overlap the upper surface of the reflective sheet. The method of claim 1, And the plurality of extension parts extend from the protrusion part. The method of claim 2, And the plurality of extension parts are bent in a "b" shape. The method of claim 1, The lamp is a liquid crystal display module, characterized in that disposed on one side of the light guide plate. The method of claim 1, And the lamp is disposed on multiple sides of the light guide plate. The method of claim 1, And a groove formed in a portion of the optical sheet corresponding to the stretched portion so as not to overlap the stretched portion.

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