TWI386721B - Liquid crystal display having reinforcing structure - Google Patents

Description

Liquid crystal display device

The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a reinforcing structure.

The liquid crystal display device has been recognized as having a low operating voltage, low power consumption, slim size, suitable for LSI (large scale integration) driving, easy to realize large-screen display, and excellent full-color display performance. Key electronic devices in the multimedia age. There are three major application areas for liquid crystal displays, namely monitors, televisions, and portable electronic products. Portable electronic products mainly include notebook computers, personal digital assistants, and mobile phones. However, no matter which application field, ultra-thin and high brightness are the main development directions of liquid crystal display devices, such as ultra-thin mobile phones and ultra-thin TVs.

With the development of the ultra-thinning trend of liquid crystal display devices, the glass substrate, which is the main volume on the liquid crystal display panel, must also be reduced, for example, the world's thinnest 0.99 mm mobile phone, which was introduced in 2006, due to the use of 0.2 mm glass. The thickness is reduced by 40% and the weight is reduced by 33%. However, the thinner the thickness of the glass substrate, the more easily it is damaged during handling, and it is also easily crushed when the liquid crystal driving circuit is placed. In particular, when there is a height difference between the liquid crystal display panel and the backlight module located thereunder, the problem of crushing is more likely to occur when the driving element is mounted in the mounting area of the liquid crystal display panel.

Referring to the schematic diagram of the planar structure of the glass substrate 10 for liquid crystal display shown in FIG. A, the glass substrate 10 has a display area 11 and a non-display area 12, and the non-display area 12 is located around the display area 11, and A mounting area 120 is formed on one side of the display area 11 and on the upper surface of the non-display area 12 for mounting circuit elements 121 such as a driving chip and a circuit board.

Referring to the side view of the display assembly 100 for liquid crystal display shown in FIG. B, a filter 20 is further disposed on the upper surface of the display region 11 of the glass substrate 10, and an upper surface of the filter 20 is disposed on the upper surface of the filter 20. The upper polarizing plate 40. A lower polarizing plate 50 is disposed on the lower surface of the display region 11 of the glass substrate 10, and a first step D1 is formed between the lower surface of the lower polarizing plate 50 and the lower surface of the non-display region 12 of the glass substrate 10.

Please refer to the schematic diagram of the planar structure of the common backlight module 60 shown in FIG. 2A and the side structure diagram of the backlight module 60 shown in FIG. B. The backlight module 60 has a plastic frame 61 for carrying the glass. The substrate is disposed on the side of the plastic frame 61 and corresponds to the non-display area 12 of the glass substrate 10 having the mounting area 120 for providing a light source. The light guide plate 63 is disposed on the plastic frame 61 for receiving The light from the side light source assembly 62, the light guide plate 63 corresponds to the display area 12 of the glass substrate 10 for transmitting light to the display area 12 of the glass substrate 10, and the optical film set 64 is disposed on the light guide plate 63. surface. A second step D2 is formed on the upper surface of the optical film group 64 and the position of the upper surface of the plastic frame 61 corresponding to the non-display area 12 of the glass substrate 10.

In the prior art, the display assembly 100 including the glass substrate 10, the filter 20, the upper polarizer 40 and the lower polarizer 50 needs to be adhered to the backlight by the black and white double-sided tape 70 as shown in the third figure. The first reinforcing plate 71 and the second reinforcing plate 72 are disposed on the plastic frame 61 of the module 60, and the first reinforcing plate 71 and the second reinforcing plate 72 are respectively disposed at the first step D1 and the second step D2. The display assembly 100 and the backlight module 60 are shown in FIG. A schematic view of the side structure of a conventional liquid crystal display device 1 assembled in accordance with a conventional combination.

Although the above bonding method can prevent the glass substrate 10 from being crushed when the driving component is mounted in the mounting area, the black and white double-sided tape 70 is adhered to the display component 100 and the backlight module 60 for the black-and-white double-sided tape 70. Between these, and corresponding to the position of the display area 11 of the glass substrate 10 and the entire non-display area 12, such a large-area adhesion method is extremely difficult to cause heavy work. For example, since the current glass substrate 10 is very thin, fragmentation is highly likely to occur during heavy work. Moreover, the reflectivity of the black-and-white double-sided tape 70 can only reach 60 to 80%, so the optical utilization rate is low, and it is difficult to achieve high definition requirements of the product, and the conventional double-layer reinforcing structure increases assembly time and steps. Therefore, it is necessary to provide a new liquid crystal display device.

The main object of the present invention is to provide a liquid crystal display device having ultra-thinning and high-definition characteristics, and has a reinforcing member which has the functions of reinforcing and reflecting at the same time.

According to the above object of the present invention, a liquid crystal display device includes: a first substrate, a backlight module, and a reinforcing member. The first substrate has a display area and a non-display area, and a mounting area is formed on the upper surface of the non-display area. The backlight module is configured to provide a light source to the first substrate, and the first substrate is disposed on the backlight module. The reinforcing member is disposed between the backlight module and the first substrate, and corresponds to a position of the mounting area of the first substrate. The reinforcing member has a substrate and a reflective layer. The upper surface of the substrate faces the lower surface of the non-display area of the first substrate, and the reflective layer is disposed on the lower surface of the substrate, and the lower surface of the reflective layer faces the backlight module to reflect Light source from the backlight module.

According to a preferred embodiment of the present invention, a backing layer is disposed on the upper surface of the substrate for adhering and fixing the reinforcing member to the lower surface of the non-display area of the first substrate.

According to a preferred embodiment of the present invention, a backing layer is disposed on the lower surface of the reflective layer for adhering the reinforcing member to the backlight module.

According to a preferred embodiment of the present invention, the liquid crystal display device further includes: a second substrate, a light shielding frame edge, an upper polarizing plate, and a lower polarizing plate. The second substrate is disposed on an upper surface of the display area of the first substrate. The light shielding frame is disposed between the first substrate and the second substrate and surrounds the periphery of the display area of the first substrate to form a light shielding area. The upper polarizing plate is disposed on an upper surface of the second substrate. The lower polarizing plate is disposed on a lower surface of the display region of the first substrate, and forms a first step difference between a lower surface of the lower polarizing plate and a lower surface of the non-display region of the first substrate.

According to a preferred embodiment of the present invention, the lower polarizing plate and the reinforcing member are disposed below the side of the light shielding frame.

According to a preferred embodiment of the present invention, the liquid crystal display device further includes a double-sided tape disposed between the lower polarizing plate and the backlight module and surrounding the display area of the first substrate.

Compared with the prior art of the present invention, the liquid crystal display device of the present invention employs a reinforcing member having a reinforcing and reflecting function, thereby enabling ultra-thinness and high definition. In one embodiment of the present invention, a light shielding frame is disposed between the first substrate and the second substrate to form a light shielding area around the display area of the first substrate, and the reinforcing member and the lower polarizing plate are handed over. Under the light shielding area, the optical quality of the first substrate is improved, and the quality of the display screen is improved. In addition, in another embodiment, since a double-sided tape is disposed between the lower polarizing plate and the backlight module, it only surrounds the periphery of the display area of the first substrate, and does not occupy the area of the non-display area, thereby When the rework is completed, the display component can be smoothly removed from the backlight module, and the double-sided tape can also provide a function of reflecting light and preventing light leakage.

In order to make the above-mentioned contents of the present invention more comprehensible, the preferred embodiments are described below, and the detailed description is as follows:

The following description of the various embodiments is provided to illustrate the specific embodiments of the invention. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "side", etc., are merely directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention. In the following embodiments, the same portions are denoted by the same reference numerals in the different drawings.

The liquid crystal display device 9 of the first embodiment of the present invention includes a glass substrate 10, a backlight module 60, and a reinforcing member 80. In the present embodiment, the glass substrate 10 is a first substrate.

Referring to FIG. 5 and FIG. 1A simultaneously, the glass substrate 10 of one embodiment of the present invention has a display area 11 and a non-display area 12, and a mounting area 120 is formed on the upper surface of the non-display area 12. At least one circuit component 121 is mounted, such as a driver chip and a circuit board.

In addition, the liquid crystal display device 9 of the present embodiment further includes a filter 20, a light shielding frame 30, an upper polarizing plate 40, and a lower polarizing plate 50. The filter 20 is disposed on the upper surface of the display region 11 of the glass substrate 10. In one embodiment, the second substrate is a filter 20. The light-shielding frame 30 is disposed between the filter 20 and the glass substrate 10 and surrounds the periphery of the display region 11 of the glass substrate 10 to form a light-shielding region on the glass substrate 10. The upper polarizing plate 40 is disposed on the upper surface of the filter 20. The lower polarizing plate 50 is disposed on the lower surface of the display region 11 of the glass substrate 10, and a first step D1 is formed between the lower surface of the lower polarizing plate 50 and the lower surface of the non-display region 12 of the glass substrate 10, the first The step D1 can be referred to the first B diagram.

As shown in FIG. 5, FIG. 2A and FIG. 2B, the backlight module 60 of one embodiment of the present invention is used to provide a light source to the glass substrate 10. The backlight module 60 includes a plastic frame 61, a side light source assembly 62, a light guide plate 63, and an optical film group 64. A second step D2 is formed on the upper surface of the optical film group 64 and the upper surface of the plastic frame 61, and the position at which the second step D2 is generated corresponds to the position of the non-display area 12 of the glass substrate 10.

Referring to FIG. 5 and FIG. 6A simultaneously, the reinforcing member 80 of the first embodiment of the present invention is disposed between the backlight module 60 and the glass substrate 10, and corresponds to the non-display area 12 of the glass substrate 10. The position of the mounting area 120 is used to increase the strength of the mounting area 120 of the glass substrate 10. In the first embodiment, the planar positional relationship between the reinforcing member 80 and the backlight module 60 is as shown in FIG. 6D. In addition, in order to improve the optical quality of the glass substrate, the reinforcing member 80 and the lower polarizing plate 50 are connected under the light shielding region (ie, the light shielding frame 30) to prevent a defective image from being displayed at the joint. In one embodiment, the reinforcing member 80 has a substrate 81 and a reflective layer 82, and the upper surface 810 of the substrate 81 faces the lower surface of the non-display area 12 of the glass substrate 10, and the two are in direct contact to provide a reinforcing effect. The reflective layer 82 is disposed on the lower surface 811 of the substrate 81, and the lower surface 821 of the reflective layer 82 faces the backlight module 60 to reflect the light source from the backlight module 60, and the lower surface 821 of the reflective layer 82 and the backlight module Group 60 is in direct contact to provide a reinforcing effect.

Referring to the reinforcing member 80 of the second embodiment shown in FIG. 6B, the reinforcing member 80 has a substrate 81 and a reflective layer 82, which is different from the first embodiment in that: the substrate 81 of the reinforcing member 80 The upper surface 810 is provided with a backing layer 83. The adhesive layer 80 can be adhered and fixed to the lower surface of the non-display area 12 of the glass substrate 10.

Referring to the reinforcing member 80 of the third embodiment shown in FIG. C, the reinforcing member 80 has a substrate 81 and a reflective layer 82, which is different from the second embodiment shown in FIG. The adhesive layer 83 is disposed on the lower surface 821 of the reflective layer 82. The adhesive layer 80 can be adhered to the backlight module 60 by the adhesive layer 83.

In addition to the above fixing manner, the reinforcing member 80 of the present invention can also form a fixing groove 610 on the upper surface of the plastic frame 61 of the backlight module 60 for accommodating and positioning the reinforcing member 80, as shown in FIG. Preferably, the thickness of the reinforcing member 80 should be greater than the depth of the fixing groove 610. Accordingly, the reinforcing member 80 can be protruded beyond the fixing groove 610, thereby achieving the purpose of compensating for the step and improving the strength. In addition, as shown in FIG. 7B, a plurality of positioning holes 813 are formed in the reinforcing member 80, and the positioning holes 813 are formed in the substrate 81 and the reflective layer 82 (not shown in the figure for simplifying the drawing). And a plurality of positioning posts 611 are formed on the upper surface of the plastic frame 61 of the backlight module 60. The positioning posts 611 are disposed corresponding to the positioning holes 813, and the positioning holes 813 and the positioning holes are disposed. The column 611 is fitted to fix the reinforcing member 80 on the plastic frame 61.

Referring to FIG. 5 , in one embodiment of the present invention, the liquid crystal display device 9 further includes a double-sided tape 90 as shown in FIG. 8 , which is disposed between the lower polarizing plate 50 and the backlight module 60 . And surrounding the display area 11 of the glass substrate for fixing the display assembly 100 including the glass substrate 10, the filter 20, the upper polarizer 40 and the lower polarizer 50 to the backlight module 60, and simultaneously It reflects light and prevents light leakage.

In one embodiment of the invention, the reinforcing member 80 is in the form of a long strip-like structure, the thickness of which may depend on the situation. For example, if only the first step D1 exists, the thickness of the strip-shaped structure is greater than or equal to the first step D1; if only the second step D2 exists, the thickness of the strip-shaped structure is greater than or equal to the first The second step D2; but if the first step D1 and the second step D2 exist simultaneously, the thickness of the strip-like structure is greater than or equal to the sum of the first step D1 and the second step D2.

In another embodiment of the present invention, as shown in FIG. 2B, the upper surface of the side light source assembly 62 of the backlight module 60 and the upper surface of the plastic frame 61 correspond to the non-display area 12 of the glass substrate 10. The position also forms a third step D3. At this time, the thickness of the reinforcing member 80 is greater than or equal to the sum of the first step difference D1, the second step difference D2, and the third step difference D3.

Since the liquid crystal display device 9 of the present invention employs the reinforcing member 80 having the reinforcing and reflecting functions, it is possible to realize ultra-thinness and high definition. In one embodiment of the present invention, referring to the fifth figure, since a light shielding frame 30 is disposed between the filter 20 and the glass substrate 10, a light shielding region is formed around the display region 11 of the glass substrate 10, On the other hand, the reinforcing member 80 and the lower polarizing plate 50 are placed under the light shielding region, thereby improving the optical quality of the glass substrate 10 and improving the quality of the display screen. In addition, since a double-sided tape 90 is disposed between the lower polarizing plate 50 and the backlight module 60, it only surrounds the periphery of the display region 11 of the glass substrate 10, and interfaces with the reinforcing member 80 under the light-shielding region without occupying The area of the non-display area 12. Therefore, when the glass substrate 10 needs to be reworked, the display assembly 100 can be smoothly removed from the backlight module, so that the originally weak non-display area 12 is not adhered by the strong adhesion of the double-sided tape 90. Damage is formed during the tearing process. Moreover, the double-sided tape 90 can also provide a function of reflecting light and preventing light leakage.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the present invention has been disclosed in the above preferred embodiments. However, it is not intended to limit the invention, and any one of ordinary skill in the art can make a few changes without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

1, 9‧‧‧ liquid crystal display device

10‧‧‧ glass substrate

100‧‧‧Display components

11‧‧‧Display area

12‧‧‧ Non-display area

120‧‧‧ Mounting area

121‧‧‧ circuit components

20‧‧‧Filter

30‧‧‧Lighting border

40‧‧‧Upper polarizer

50‧‧‧low polarizer

60‧‧‧Backlight module

610‧‧‧Fixed grooves

611‧‧‧Positioning column

61‧‧‧ plastic frame

62‧‧‧ Side light source components

63‧‧‧Light guide plate

64‧‧‧Optical diaphragm group

70‧‧‧Black and white double-sided tape

71‧‧‧First stiffener

72‧‧‧Second reinforcing plate

80‧‧‧Reinforcement

81‧‧‧Substrate

810‧‧‧ upper surface

811, 821‧‧‧ lower surface

813‧‧‧Positioning holes

82‧‧‧reflective layer

83‧‧ ‧ adhesive layer

90‧‧‧Double-sided tape

D1‧‧‧ first paragraph difference

D2‧‧‧ second paragraph difference

D3‧‧‧ third paragraph difference

The first A diagram shows a schematic plan view of a glass substrate used for liquid crystal display.

The first B diagram shows a side structure diagram of a display assembly for liquid crystal display.

The second A diagram shows a schematic diagram of a planar structure used for the backlight module.

The second B diagram shows a schematic view of the side structure of the backlight module.

The third figure is a schematic plan view of a black and white double-sided tape used in a conventional liquid crystal display device.

The fourth figure shows a side structure diagram of a conventional liquid crystal display device in which the display component and the backlight module are assembled in a conventional combination.

Fig. 5 is a side view showing the structure of a liquid crystal display device in the first embodiment of the present invention.

Figure 6A is a side view showing the structure of the reinforcing member in the first embodiment of the present invention.

Figure 6B is a side view showing the structure of the reinforcing member in the second embodiment of the present invention.

The sixth C is a schematic view of the side structure of the reinforcing member in the third embodiment of the present invention.

The sixth D diagram is a planar positional relationship between the reinforcing member and the backlight module of the first embodiment of the present invention.

FIG. 7 is a schematic structural view showing the positioning of the reinforcing member and the plastic frame in one embodiment of the present invention.

FIG. 7B is a schematic structural view showing the positioning of the reinforcing member and the plastic frame in another embodiment of the present invention.

Figure 8 is a plan view showing the planar structure of a double-sided tape in an embodiment of the present invention.

9. . . Liquid crystal display device

10. . . glass substrate

100. . . Display component

11. . . Display area

12. . . Non-display area

120. . . Mounting area

121. . . Circuit component

20. . . Filter

30. . . Blackout frame

40. . . Upper polarizer

50. . . Lower polarizer

60. . . Backlight module

80. . . Reinforcement

81. . . Substrate

82. . . Reflective layer

90. . . double-sided tape

Claims (13)

A liquid crystal display device includes: a first substrate having a display area and a non-display area; a mounting area is formed on the upper surface of the non-display area; and a lower polarizing plate is disposed under the display area of the first substrate Forming a first step between the lower surface of the lower polarizing plate and the lower surface of the non-display area of the first substrate; a backlight module for providing a light source to the first substrate, the first substrate And the lower polarizing plate is disposed on the backlight module; and a reinforcing member is disposed between the backlight module and the first substrate, and corresponding to the position of the mounting area of the first substrate, the reinforcing The device has a substrate and a reflective layer, the upper surface of the substrate faces the lower surface of the non-display area of the first substrate, and the reflective layer is disposed on the lower surface of the substrate, and the lower surface of the reflective layer is oriented The backlight module reflects the light source from the backlight module; wherein the reinforcing member has a long plate-like structure, and the thickness of the elongated plate-shaped structure is greater than or equal to the first step. The liquid crystal display device of claim 1, wherein the upper surface of the substrate is provided with a backing layer for adhering the reinforcing member to the lower surface of the non-display area of the first substrate. The liquid crystal display device of claim 1, wherein the reflective layer is provided with a backing layer for adhering the reinforcing member to the backlight module. The liquid crystal display device of claim 1, wherein the backlight module has a plastic frame for carrying the first substrate and fixing the reinforcing member. The liquid crystal display device of claim 4, wherein the upper surface of the plastic frame has a fixing groove for receiving and positioning the reinforcing member, and the reinforcing member has a thickness greater than a depth of the fixing groove. The liquid crystal display device of claim 4, wherein the reinforcing member forms a plurality of positioning holes, the positioning holes penetrating the substrate and the reflective layer above and below the surface, and on the plastic frame A plurality of positioning posts are formed on the surface, and the positioning posts are disposed corresponding to the positioning holes, and the positioning holes are matched with the positioning posts to fix the reinforcing member on the plastic frame. The liquid crystal display device of claim 4, further comprising: a second substrate disposed on an upper surface of the display region of the first substrate; a light shielding frame edge disposed on the first substrate and the first substrate Between the two substrates, and surrounding the display area of the first substrate to form a light shielding area; an upper polarizing plate disposed on the upper surface of the second substrate. The liquid crystal display device of claim 7, wherein the lower polarizing plate and the reinforcing member are disposed below the side of the light shielding frame. The liquid crystal display device of claim 7, wherein the backlight module further comprises: a side light source component disposed on the plastic frame and corresponding to a position of the non-display area of the first substrate; a light board disposed on the plastic frame for receiving light from the side light source assembly and transmitting the light to the display area of the first substrate; and an optical film set disposed on the light guide plate On the upper surface of the optical film set and the plastic frame A position of the upper surface corresponding to the non-display area of the first substrate forms a second step. The liquid crystal display device of claim 9, further comprising a double-sided tape disposed between the lower polarizing plate and the backlight module and surrounding the display area of the first substrate. The liquid crystal display device of claim 9, wherein the thickness of the reinforcing member is greater than or equal to a sum of the first step difference and the second step difference. The liquid crystal display device of claim 9, wherein the upper surface of the side light source component and the upper surface of the plastic frame correspond to a position of the non-display area of the first substrate to form a third step. The liquid crystal display device of claim 12, wherein the thickness of the reinforcing member is greater than or equal to a sum of the first step difference, the second step difference, and the third step difference.