KR100859121B1 - Display module and portable phone having the same - Google Patents

Abstract

A display module and a portable terminal having the same are provided to compensate mechanically the thermal expiation rate of a light shielding tape based on the thermal expansion of a diffusing sheet, thereby preventing the diffusing sheet from being curved and shriveled. A display module(20) includes a panel(30) and a BLU(Back Light Unit)(40). An image is formed on the panel. The BLU is disposed in the rear of the panel to transmit light to the panel. The BLU includes a light guide plate(41), a reflection sheet(42), at least one diffusing sheet(43,44), and a light shielding tape(45). The reflection sheet is disposed in the lower part of the light guide plate to reflect light to the light guide plate. The at least one diffusing sheet is disposed in the upper part of the light guide plate to diffuse light to the panel. The light shielding tape is bonded between the panel and the at least one diffusing sheet to prevent light from being leaked through the panel and has an open loop shape in which at least one side is open to compensate the thermal expansion of the diffusing sheet.

Description

Display module and terminal equipped with the same {Display module and portable phone having the same}

The present invention relates to a display module and a terminal having the same, and more particularly, a phenomenon in which a diffusion sheet is partially bent and crying as in the prior art by mechanically compensating a thermal expansion rate of a light shielding tape based on thermal expansion of a diffusion sheet. It relates to a display module and a terminal having the same that can be prevented from occurring.

The terminal refers to a personal mobile phone including a PCS phone, a PDA and the like. For modern people, terminals are becoming a necessity rather than a luxury. Accordingly, in case of terminal manufacturers, new products are built or the exterior designs are made colorful and products are released from time to time, and consumers are also replacing terminals at regular intervals.

As will be described in detail below, the terminal is divided into an input portion for inputting information and a display portion for outputting the input information or displaying external information. The display portion refers to a display module, also called liquid crystal.

The display module largely includes a panel in which an image is formed, a back light unit that is coupled to the rear of the panel to project light to the panel, and a main mold frame in which they are received and combined. Equipped.

LCD (Liquid Crystal Display) is mainly adopted. Panel applied to LCD does not emit light by itself and is adopted by adjusting the transmittance of light. Should be projected. This function is handled by the backlight unit.

The backlight unit directly directs the front surface of the panel by arranging the light source on one side of the panel, and arranges a line light source or a point light source on one side or a plurality of side surfaces of the panel to reflect and diffuse light beams on the light guide plate and the reflective sheet. It is divided into the edge (edge) method. At present, devices such as terminals called mobile phones mainly adopt the latter edge method.

On the other hand, there is a light shielding tape as one of a plurality of components constituting the backlight unit. The light shielding tape is provided between the panel and the diffusion sheet to bond the panel and the diffusion sheet to each other, so that light leaks to a portion outside the image display area of the panel, and thus serves to prevent light leakage. Currently, the light blocking tape applied to most display modules has a rectangular closed loop shape with four surfaces closed.

However, in the conventional display module, since the thermal expansion coefficient between the light-shielding tape and the diffusion sheet bonded to each other is different from each other, the light-shielding tape is not thermally expanded accordingly during thermal expansion of the diffusion sheet, and as a result, the diffusion sheet is partially bent and crying occurs. There is a problem. In particular, this phenomenon is deepened as the thickness of the diffusion sheet and the light shielding tape becomes thin due to the slimming of the display module, and thus measures are required.

SUMMARY OF THE INVENTION An object of the present invention is a display module and a terminal having the same, which mechanically compensates the thermal expansion rate of a light shielding tape based on thermal expansion of a diffusion sheet, thereby preventing the diffusion sheet from being partially bent while crying. To provide.

The object is, according to the present invention, a panel on which an image is formed; And a backlight unit disposed behind the panel to project light onto the panel, wherein the backlight unit comprises: a light guide plate; A reflection sheet disposed under the light guide plate to reflect light toward the light guide plate; At least one diffusion sheet disposed on the light guide plate to diffuse light toward the panel; And a light shielding tape bonded between the panel and the diffusion sheet to prevent light leakage through the panel, but having a open loop shape having at least one open loop shape to compensate for thermal expansion of the diffusion sheet. It is achieved by a display module and a terminal having the same.

Here, the light shielding tape may be formed with a tape erasing section to mechanically compensate for the thermal expansion of the diffusion sheet.

The tape erasing section may be formed at a long side of the light blocking tape.

The tape erasing section may be provided in a pair to be symmetrical to both long sides of the light shielding tape.

The tape erasing section may be formed at a long side of the light shielding tape at a position corresponding to the hook portion formed at the central portion of the side surface of the light guide plate.

A perforation line may be formed in a boundary region of the tape erasing section so that the tape erasing section is formed when the protective film provided on both surfaces of the light blocking tape is removed.

The panel includes an image display area in which an image is formed and noise divided into a black matrix back matrix and a black untransparent transparent glass section formed outside the image display area. A main mold frame, the main mold frame supporting the panel and the backlight unit; And a sub-molded frame disposed in a space between the main mold frame and the panel based on the size of the transparent glass section of the panel and preventing light leakage from the corresponding position to the panel.

The light-shielding tape partially adheres to the panel, the diffusion sheet, the main mold frame, and the sub mold frame so that at least one area on both sides of the light blocking tape prevents light leakage from occurring at a position adjacent to the image display area of the panel. Can be.

The light blocking tape may have one region of an upper surface adhered to a lower surface of the panel and the sub mold frame, and one region of a lower surface adhered to an upper surface of the main mold frame and the diffusion sheet.

The sub mold frame may be disposed in a space formed by forcibly retracting the side wall of the main mold frame.

According to the present invention, the thermal expansion rate of the light shielding tape based on the thermal expansion of the diffusion sheet may be mechanically compensated to prevent occurrence of the crying phenomenon while partially diffusing the diffusion sheet as in the related art.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a perspective view of a terminal to which a display module is applied according to an embodiment of the present invention.

As shown in this figure, the terminal 10 according to an embodiment of the present invention is largely the main body portion 11, the folder portion 15 for opening and closing the front of the main body portion 11, the main body portion 11 ) And a hinge 17 for rotating the folder portion 15 relative to the main body portion 11 and the battery 18 detachably coupled to the rear surface of the main body portion 11. . The terminal 10 shown in FIG. 1 is a so-called clamshell mobile phone.

A plurality of key buttons 12 are provided on the inner surface of the main body 11. The lower part of the key buttons 12 is provided with a microphone 13 for transmitting voice, and the upper part is provided with function buttons 14. The function buttons 14 are used to search various menus or select a function stored in the terminal 10, unlike the key buttons 12 for inputting a phone number or a letter.

Above the inner surface of the folder unit 15, a receiver 16 for receiving voices from the other party is formed. In addition, a display module 20 including a phone number, a state of charge of the battery 18, a vibration state, an alarm state display, and the like is formed below the receiver 16. Here, the display module 20 may be the folder part 15 itself or may be a part of the folder part 15.

FIG. 2 is a perspective view of the display module shown in FIG. 1, FIG. 3 is an exploded perspective view of FIG. 2, and FIG. 4 is a view illustrating an operation of peeling a protective film from the light shielding tape shown in FIG. 3. 4 is a plan view of the light shielding tape from which the protective film is peeled off.

As shown in these figures, the display module 20 according to the embodiment of the present invention is disposed behind the panel 30 and the panel 30 on which the image is formed, and the predetermined light to the panel 30. And a backlight unit 40 for projecting the light, and a main mold frame 50 for supporting the panel 30 and the backlight unit 40.

As described above, a plasma display panel (PDP), a liquid crystal display (LCD), an organic light emitting diode (OLED), a field emission display (FED), and the like may be applied to the panel 30. (30) shall be applied.

In detail, the LCD panel 30 includes an upper glass 31 and a lower glass 32 which are partially faced to each other in a state in which a liquid crystal (not shown) is injected therein. . Although not shown, the upper and lower polarizer films are adhered to the outer surfaces of the upper glass 31 and the lower glass 32, respectively.

The upper glass 31, which forms an image of a color, has a smaller area than the lower glass 32, which is a TFT panel. Therefore, a portion where the upper glass 31 does not overlap exists on the upper surface of the lower glass 32, and the driver IC 33 is mounted on this portion. The driver IC 33 is connected to a printed circuit board (PCB) provided in the terminal 10 by the FPC 30a (Flexible Printed Circuit).

First, the main mold frame 50 supporting the panel 30 and the backlight unit 40 will be described. The main mold frame 50 includes a buffer frame 51 and a frame support 52.

The buffer frame 51 buffers the backlight unit 40 and the panel 30. In addition, the frame support part 52 serves to surround and surround the buffer frame 51 so that the entire buffer frame 51 to which the backlight unit 40 and the panel 30 are coupled can be accommodated.

More specifically, the buffer frame 51 serves to cushion the impact applied to the panel 30, for example, by dropping the terminal 10. Therefore, the buffer frame 51 is preferably formed of a soft material such as rubber or silicon that can be buffered against impact.

In the present embodiment, since the panel 30 has a rectangular shape, the buffer frame 51 also has a rectangular shape corresponding thereto. However, if the panel 30 is not rectangular, the buffer frame 51 may have another shape appropriately.

Although not shown in detail, the side of the buffer frame 51 is inserted into a plurality of guide holes (not shown) formed in the frame support 52 when the buffer frame 51 is received and coupled in the frame support 52. Guide pins (not shown) are formed to protrude. By the interaction of the guide pin and the guide hole, the buffer frame 51 can be easily coupled in the frame support 52. Of course, the guide pin and the guide hole may be excluded in configuration.

As described above, since the shock absorbing frame 51 is made of a flexible material, the shape may be changed in the process of assembling with other components after the molding by applying to the display module 20. That is, since the buffer frame 51 is a relatively weak soft material, it may be easily bent or twisted by heat or external force.

If the shock absorbing frame 51 is deformed, the panel 30 and the backlight unit 40 cannot be easily combined, and even though the assembly is forcibly assembled, a large number of assembly tolerances occur, which inevitably degrades the reliability of the product. There is a fear that the functions of the 30 and the backlight unit 40 are lost.

Therefore, while the shock absorbing frame 51 is manufactured with a soft material to cushion the impact applied to the panel 30, it is necessary to prepare a countermeasure so that the shape or appearance of the manufactured shock absorbing frame 51 is not arbitrarily deformed. This is the frame support 52.

The frame support part 52 surrounds and supports the outer periphery of the shock absorbing frame 51 to prevent the shock absorbing frame 51 from being arbitrarily deformed. Therefore, the frame support 52 is preferably made of a relatively strong material, for example, stainless steel (SUS) sheet than the buffer frame (51).

However, if the frame support portion 52 is manufactured using a thick stainless steel plate, the desired strength can be maintained, but the overall thickness of the display module 20 is increased to meet the slimming of the terminal 10. Since it is difficult to do so and may cause a cost loss, the frame support part 52 is manufactured by using a thin stainless steel (SUS) sheet, but in terms of strength, the frame support part 52 can be significantly higher than the conventional display module. It is necessary to improve the structural strength for 20).

On the other hand, the backlight unit 40 is coupled to the main mold frame 50 together with the panel 30 serves to project a predetermined light to the panel 30.

As shown in FIG. 3, the backlight unit 40 includes a light guide plate 41, a reflective sheet 42 disposed below the light guide plate 41, and a pair disposed above the light guide plate 41. The diffusion sheets 43 and 44, the light shielding tape 45 bonded between the panel 30 and the diffusion sheet 44, and one side of the panel 30 coupled to the rear surface of the frame support 52, which will be described later. Flexible Printed Circuit Board (FPCB) (Flexible Printed Circuit Board (FPCB)) connected to the FPC (30a, Flexible Printed Circuit), including a large scale integration (LSI) for driving, and light guide plate 41. LED mounting FPCB 46 is provided with a light emitting diode (LED).

In the figure, the light guide plate 41 is shown as a substantially rectangular plate-like body. However, the light guide plate 41 may be formed to be inclined so that the upper surface toward the diffusion sheets 43 and 44 is flat and the lower surface thereof becomes narrower from one end to the other end.

Reflective sheet 42 is disposed to be substantially the same as the area of the light guide plate 41 to prevent light from leaking to the lower portion of the light guide plate 41 as well as to reflect the leaked light again through the light guide plate 41. Role). One surface of the reflective sheet 42, that is, the surface facing the light guide plate 41 forms a mirror-like mirror surface.

The diffusion sheets 43 and 44 serve to diffuse light generated from the light guide plate 41. Although no pattern is shown on the surfaces of the diffusion sheets 43 and 44 in the drawings of the present embodiment, the surface of the diffusion sheets 43 and 44 has a plurality of fine dot patterns continuously to diffuse more light. Can be formed.

In addition, although light is uniform due to light diffusion, a prism sheet (not shown) having a prism pattern that exerts a light focusing effect may be used to prevent a decrease in brightness caused by side effects. In the present embodiment, two diffusion sheets 43 and 44 are used, but the scope of the present invention is not limited to the number thereof. In the present embodiment, a diffuser 47 is further provided below the lower diffusion sheet 43, but the diffuser 47 is not necessarily provided.

The light shielding tape 45 serves to shield light from leaking to portions outside the image display area of the panel 30. That is, the light shielding tape 45 is provided between the panel 30 and the diffusion sheet 44, and both surfaces of the panel 30 and the diffusion sheet 44 in the peripheral region of the panel 30 and the diffusion sheet 44 are provided. The light diffused through each of the diffusion sheets 44 and diffused through the panel 30 does not go straight through the panel 30 but is dispersed outward in the plate direction of the panel 30 so that light leaks through the panel 30. Play a role.

On the other hand, as described above, since the conventional light-shielding tape (not shown) has a closed loop (closed loop) shape of the four sides closed, the light-shielding tape is not thermally expanded accordingly when the diffusion sheet 44 is thermally expanded. As a result, the diffusion sheet 44 partially bent and a crying phenomenon occurred. This is a phenomenon caused by overlooking the difference in thermal expansion coefficient between the light-shielding tape 45 and the diffusion sheet 44 which are bonded to each other, in particular, this phenomenon is the diffusion sheet 44 according to the slimming of the display module 20 And the thickness of the light shielding tape 45 is known to deepen even more.

Therefore, a method of manufacturing the light shielding tape 45 through the material change of the light shielding tape 45, that is, using the same material as the diffusion sheet 44 may be considered. Not only does the cost increase due to the material change of the tape 45 but also a lot of loss (loss) in the manufacturing process is expected to be difficult to apply easily.

Therefore, in the present embodiment, the diffusion sheet 44 is partially partially applied by conventionally compensating the thermal expansion rate of the light shielding tape 45 based on the thermal expansion of the diffusion sheet 44 by applying a simple and simple method as follows. It is bending to prevent the occurrence of crying.

As shown in FIGS. 4 and 5, the light shielding tape 45 of the present embodiment has an open loop shape in which at least one side is open to compensate for thermal expansion of the diffusion sheet 44, unlike the conventional art. .

In other words, the light-shielding tape 45 of this embodiment is provided with a tape erasing section A for mechanically compensating for thermal expansion of the diffusion sheet 44. Due to the tape erasing section A, the light shielding tape 45 of this embodiment has a form in which a '-' shaped tape faces each other at a predetermined interval.

Since the thermal expansion rate of the diffusion sheet 44 which usually imparts optical properties is higher than that of the light shielding tape 45, when the diffusion sheet 44 is deformed to thermally expand, the light shielding tape 45 is deformed. If the expansion sheet 44 is not compensated for and the diffusion sheet 44 is not limited to thermal expansion, the diffusion sheet 44 may be partially bent, resulting in a crying phenomenon.

However, in the case where the tape erasing section A is provided on the light shielding tape 45 to mechanically compensate for the thermal expansion of the diffusion sheet 44, the diffusion sheet (A) in the region of the tape erasing section A is provided. By freeing the thermal expansion of 44, it is possible to prevent the crying phenomenon from occurring in the diffusion sheet 44.

The tape erasing section A may be formed at the long side of the light shielding tape 45, and in particular, the light shielding tape 45 at a position corresponding to the hook portion 41a (see FIG. 3) formed at the central region of the side surface of the light guide plate 41. It may be formed on the long side of).

In addition, the tape erasing section A of the present embodiment may be provided in pairs symmetrically on both long sides of the light shielding tape 45. This is for compensating for the thermal expansion of the diffusion sheet 44 because the thermal expansion to the long side is more than the thermal expansion to the short side.

However, since the scope of the present invention does not need to be limited thereto, the tape erasing section A may be formed on both short sides of the light shielding tape 45, or may be formed on both the long side and the short side.

In addition, the tape erasing section A does not necessarily need to be formed on the long side of the light shielding tape 45 at a position corresponding to the hook portion 41a (see FIG. 3) formed at the side center region of the light guide plate 41. As a result, the light shielding tape 45 of the present embodiment is sufficient as long as it has an open loop shape in which at least one side is open regardless of its shape.

Meanwhile, as shown in FIG. 5, two tapes having a 'c' shape must be disposed between the panel 30 and the diffusion sheet 44 to bond the panel 30 and the diffusion sheet 44 to each other. This can be inconvenient in the process.

Thus, in the present embodiment, when the protective film P / T provided on both surfaces of the light shielding tape 45 is removed in the process to protect the light shielding tape 45, the tape erasing section A is formed on the light shielding tape 45. The perforation line A1 is formed in the boundary region of the tape erasing section A so that it can be naturally formed.

Due to this cut line A1, for example, when one surface of the light shielding tape 45 is adhered to the diffusion sheet 44, the protective film P / T formed on the other surface of the light shielding tape 45 is removed as shown in FIG. When the protective film P / T is removed, the cutting line A1 is torn off, and thus the tape deleting section A may be naturally formed on the light shielding tape 45 as shown in FIG. 5.

With this configuration, when the LED emits light and the light of the LED is incident on the light guide plate 41, and then proceeds along the plate surface of the light guide plate 41, part of the light is diffused on the upper part of the light guide plate 41 by reflection and scattering. The sheets 43 and 44 are directed to the sheets, and the others are directed to the reflective sheets 42 positioned below the light guide plate 41.

Light directed to the reflective sheet 42 is reflected by the reflective sheet 42 and then moved back to the diffusion sheets 43 and 44 through the light guide plate 41. Light diffused through the diffusion sheets 43 and 44 is uniformly diffused through the diffusion sheets 43 and 44 and then incident to the panel 30. Accordingly, the user can see the image formed on the panel 30.

At this time, since the light shielding tape 45 is provided between the panel 30 and the diffusion sheet 44, the light diffused through the diffusion sheet 44 does not go straight through the panel 30 and the plate surface direction of the panel 30 is maintained. Light leakage through the panel 30 is prevented while being distributed to the outside. In particular, since the tape erasing section A is provided on the light shielding tape 45 to mechanically compensate for the thermal expansion of the diffusion sheet 44 even when the diffusion sheet 44 thermally expands, the diffusion sheet ( By freeing the thermal expansion of 44, it is possible to prevent the crying phenomenon from occurring in the diffusion sheet 44.

As described above, according to the present exemplary embodiment, the diffusion sheets 43 and 44 partially bend as in the prior art by mechanically compensating the thermal expansion rate of the light shielding tape 45 based on the thermal expansion of the diffusion sheets 43 and 44. The crying phenomenon can be prevented from occurring.

6 is a schematic cross-sectional view of a display module according to another embodiment of the present invention. With reference to FIG. 6, the above-described embodiment will not be described, or parts different from the above-described embodiment will be described.

As illustrated in FIG. 6, the LCD panel 30 is divided into an image display area P1 that is displayed while an actual image is formed and a noise area P2 that is formed outside the image display area P1.

The noise region P2 is further divided into a black matrix section B (back matrix) that is black and a transparent glass section (T) that is not black.

The black matrix section B is provided to increase the sharpness of the image displayed in the image display area P1. That is, when the black matrix section B is processed to black, only the light passing through the image display area P1 forms an image, thereby obtaining a clear image having a high contrast ratio. If you put a TV on the side of the window and watch TV in the daytime, you can see a much clearer picture if you put a thick black curtain on the window, and the black matrix section (B) performs the role of black curtain at this time.

The size of the transparent glass section T is determined in consideration of the production yield of the plurality of unit substrates compared to the original substrate when cutting the plurality of unit substrates from the large area substrate. As described above, the transparent glass section T is gradually increasing in recent years.

In the present exemplary embodiment, the light shielding tape 45 serves to block light from leaking to a portion other than the image display area P1 of the panel 30. To this end, one area of the upper surface of the light blocking tape 45 is adhered to the lower surface of the panel 30 and the sub mold frame 60, and one area of the lower surface of the light blocking tape 45 is formed on the upper surface of the main mold frame 50 and the diffusion sheet 44. It is bonded, and serves to prevent the occurrence of light leakage at a position adjacent to the image display area P1 of the panel 30 at that position.

A lower portion of the main mold frame 50 is further formed with a groove 50a into which the aforementioned reflective sheet 42 is partially inserted. The circumferential surface of the reflective sheet 42 is partially inserted into the groove 50a. After the reflective sheet 42 is inserted into the groove 50a, the lower surface of the reflective sheet 42 and the lower surface of the main mold frame 50 are One surface can be formed. The reflective sheet 42 may be attached to the main mold frame 50 by an adhesive or a tape 42a.

Meanwhile, in the present embodiment, a sub mold frame 60 may be further provided in addition to the main mold frame 50. The sub mold frame 60 is disposed in the space between the main mold frame 50 and the panel 30 based on the size of the transparent glass section T of the panel 30 and moves from the corresponding position toward the panel 30. It acts to prevent the generation of light leakage.

In other words, in the prior art, since the size of the main mold frame 50 was uniformly standardized, the panel 30 having different sizes of the transparent glass section T, that is, the overall size SIZE, was used. However, it was difficult to apply one kind of main mold frame 50 to panels having different sizes. Therefore, if the size of the transparent glass section (T) is narrow, the gap between the panel 30 and the main mold frame 50 is generated a lot of light leakage has a disadvantage.

However, in the present exemplary embodiment, the sub mold frame 60 is further provided inside the main mold frame 50 to be commonly applied to all panels having different sizes or sizes thereof, thereby preventing light leakage from occurring. It is. When the sub-molded frame 60 is provided as described above, there is an advantage that the sub-molded frame 60 can be commonly applied to all panels having different sizes or sizes even by simple replacement of the sub-molded frame 60.

At this time, when the sub-molded frame 60 is simply provided inside the main mold frame 50, the overall size of the display module 20 may be increased, and thus, in this embodiment, the sidewall of the main mold frame 50 is forced. By retreating, the space S is made, and the sub mold frame 60 is disposed in the space S to prevent the size of the display module 20 from increasing. Therefore, the original sidewall thickness of the main mold frame 50 is substantially the thickness of the sum of the spaces S in FIG. 6.

With this configuration, although the light travels along the plate surface of the light guide plate 41 or the light from the wing portion 41b of the light guide plate 41 can leak out through the coupling region between the parts, the light shielding tape ( 45 and the sub-molded frame 60 are disposed, so that light leakage occurs at a position adjacent to the image display area P1 of the panel 30 as in the prior art, thereby preventing the image from being disturbed. .

Of course, some light leakage phenomenon can be achieved even in the structure of the present embodiment. However, although light leakage occurs, the area other than the position adjacent to the image display area P1 of the panel 30, i.e., FIG. The image is formed more clearly than in the prior art because it is formed in the area between the sub mold frame 60 and the main mold frame 50, which is far from the image display area P1 of the panel 30, as in the dotted arrow direction. Is enough to implement

In the above-described embodiments, the display module is applied only to the inside of the folder portion, but the display module may be applied to the outside of the folder portion. In this case, one more display module may be used, or the auxiliary panel may be disposed on the opposite side after opening the bottom plate of the frame support. In this case, it is preferable to use a light guide plate capable of emitting light in both directions, and instead of the reflective sheet, the diffusion sheet should be disposed at that position.

In the above-described embodiment, the terminal is limited to a telephone such as a PCS phone and a PDA, but the area can be extended to a digital camera, a camcorder, a calculator, etc. to which a display module can be applied.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

1 is a perspective view of a terminal to which a display module is applied according to an embodiment of the present invention.

FIG. 2 is a perspective view of the display module shown in FIG. 1.

3 is an exploded perspective view of FIG. 2.

FIG. 4 is a view illustrating an operation of peeling a protective film from the light shielding tape shown in FIG. 3.

FIG. 5 is a plan view of a light shielding tape having a protective film peeled from FIG. 4.

6 is a schematic cross-sectional view of a display module according to another embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: terminal 20: display module

30 panel 40 backlight unit

41: light guide plate 42: reflective sheet

43,44: Diffusion sheet 45: Light shielding tape

46: LED mounting FPCB 50: main mold frame

60: sub mold frame

Claims (11)

A panel on which an image is formed; And A back light unit disposed behind the panel to project light onto the panel; The backlight unit, Light guide plate; A reflection sheet disposed under the light guide plate to reflect light toward the light guide plate; At least one diffusion sheet disposed on the light guide plate to diffuse light toward the panel; And And a light shielding tape bonded between the panel and the diffusion sheet to prevent light leaking through the panel, but having an open loop shape having at least one open loop to compensate for thermal expansion of the diffusion sheet. Display module. The method of claim 1, And the tape erasing section is formed on the light blocking tape to mechanically compensate for thermal expansion of the diffusion sheet. The method of claim 2, And the tape erasing section is formed at a long side of the light shielding tape. The method of claim 3, The tape erasing section is a display module, characterized in that provided in a pair symmetrically on both sides of the light-shielding tape. The method of claim 2, And the tape erasing section is formed at a long side of the light shielding tape at a position corresponding to a hook portion formed at a central portion of the side surface of the light guide plate. The method of claim 2, And a perforation line is formed at a boundary area of the tape erasing section so that the tape erasing section is formed when the protective films provided on both sides of the light shielding tape are removed. The method of claim 1, The panel includes an image display area in which an image is formed, and noise divided into a black matrix back matrix and an untransparent transparent glass section, which are formed outside of the image display area and are black. Has an area, A main mold frame supporting the panel and the backlight unit; And And a sub-molded frame disposed in a space between the main mold frame and the panel based on the size of the transparent glass section of the panel and preventing light leakage from the corresponding position to the panel. module. The method of claim 7, wherein The light-shielding tape partially adheres to the panel, the diffusion sheet, the main mold frame, and the sub mold frame so that at least one area on both sides of the light blocking tape prevents light leakage from occurring at a position adjacent to the image display area of the panel. Display module, characterized in that. The method of claim 8, The light blocking tape of claim 1, wherein an area of an upper surface of the light blocking tape is bonded to a lower surface of the panel and the sub mold frame, and an area of a lower surface of the light blocking tape is attached to an upper surface of the main mold frame and the diffusion sheet. The method of claim 7, wherein And the sub mold frame is disposed in a space formed by forcibly retracting a side wall of the main mold frame. A terminal having the display module of claim 1.

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