CN102866518A - Liquid crystal display equipment - Google Patents
Liquid crystal display equipment Download PDFInfo
- Publication number
- CN102866518A CN102866518A CN 201210352841 CN201210352841A CN102866518A CN 102866518 A CN102866518 A CN 102866518A CN 201210352841 CN201210352841 CN 201210352841 CN 201210352841 A CN201210352841 A CN 201210352841A CN 102866518 A CN102866518 A CN 102866518A
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- China
- Prior art keywords
- liquid crystal
- polarizing plate
- crystal display
- lower polarizing
- crystal panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 87
- 239000002390 adhesive tape Substances 0.000 claims abstract description 19
- 239000010410 layer Substances 0.000 description 22
- 239000012790 adhesive layer Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- Liquid Crystal (AREA)
Abstract
The invention provides liquid crystal display equipment, which comprises a liquid crystal panel, a lower polarizing plate and a backlight module, wherein the lower polarizing plate is arranged below the liquid crystal panel, the backlight module comprises a rubber frame, the lower polarizing plate and the rubber frame are bonded by a double-sided adhesive tape, and horizontal projection of the lower polarizing plate completely covers the double-sized adhesive tape. By adopting the liquid crystal display equipment, the lower polarizing plate and the rubber frame of backlight module are bonded by the double-size adhesive tape, the horizontal projection of the lower polarizing plate completely covers the double-sized adhesive tape, so that the bonding area of the rubber frame and the lower polarizing plate can be increased, and the bonding strength of the liquid crystal panel and the backlight module is further improved.
Description
Technical Field
The present disclosure relates to display devices, and particularly to a liquid crystal display device capable of firmly bonding a liquid crystal panel and a backlight module.
Background
Currently, liquid crystal display devices (such as thin film transistor liquid crystal displays, TFT-LCDs) have been widely used in present day display devices due to their advantages of low power consumption and low radiation. With the continuous progress of the liquid crystal industry technology, the large size and the thin type of the liquid crystal display device are becoming the mainstream demands of the market. Specifically, the lcd device generally includes a liquid crystal panel, a backlight module, an upper polarizer located above the liquid crystal panel, and a lower polarizer located below the liquid crystal panel, wherein the liquid crystal panel at least includes a color filter glass substrate (CF substrate), a liquid crystal layer, and a thin film transistor array substrate (TFT array substrate), the backlight module at least includes a back plate, a rubber frame, a backlight source, a light guide plate, and an optical film, and a structure of the backlight module largely determines a large size and a thin width of the entire device. Therefore, the design of the backlight module with a narrow frame is more popular with researchers than before.
In the prior art, a narrow-border design is implemented by fixing and attaching a lower polarizer below a liquid crystal panel and a rubber frame of a backlight module through an adhesive layer. For example, the adhesive layer is formed by using a double-sided adhesive tape, the upper adhesive surface of the adhesive layer is adhered to the lower surface of the lower polarizing plate, and the lower adhesive surface of the adhesive layer is adhered to the upper surface of the adhesive frame, so that the liquid crystal panel and the backlight module are fixed together. However, the above structure often causes the problem of adhesive strength, and the liquid crystal panel and the backlight module are easily separated during the drop test before the product leaves the factory, which results in the decrease of the yield of the product.
In view of this, it is a subject to be solved by those skilled in the relevant art how to design a novel narrow-frame backlight module, which can reduce the thickness of the frame of the liquid crystal display device and simultaneously firmly connect the backlight module and the liquid crystal panel to prevent the backlight module and the liquid crystal panel from being separated due to low bonding strength.
Disclosure of Invention
Aiming at the defects existing in the design of the liquid crystal display equipment in the prior art, the invention provides the novel liquid crystal display equipment which can firmly bond the liquid crystal panel and the backlight module.
According to an aspect of the present invention, there is provided a liquid crystal display device including a liquid crystal panel, a lower polarizing plate disposed below the liquid crystal panel, and a backlight module including a bezel, the lower polarizing plate and the bezel being bonded by a double-sided tape layer, wherein a horizontal projection of the lower polarizing plate completely covers the double-sided tape layer.
Preferably, the liquid crystal display device further includes an upper polarizer disposed opposite to the lower polarizer, wherein a horizontal projection of the lower polarizer has a first length, and a horizontal projection of the upper polarizer has a second length, and the first length is greater than the second length.
Preferably, the liquid crystal panel further includes a liquid crystal layer disposed between the upper polarizing plate and the lower polarizing plate, and a horizontal projection length of the liquid crystal layer is greater than the second length and less than the first length.
Preferably, the frame has a first vertical portion and a second vertical portion opposite to each other, and the double-sided tape layer has a first tape portion and a second tape portion opposite to each other, wherein the lower polarizer is adhered to the first vertical portion by the first tape portion and adhered to the second vertical portion by the second tape portion.
Preferably, the double-sided tape layer is a light-shielding tape.
Preferably, the liquid crystal display device is a narrow-bezel liquid crystal display.
By adopting the liquid crystal display equipment, the lower polarizing plate below the liquid crystal panel is bonded with the rubber frame of the backlight module through the double-sided adhesive tape layer, and the horizontal projection of the lower polarizing plate completely covers the double-sided adhesive tape layer, so that the bonding area of the rubber frame and the lower polarizing plate can be enlarged, and the bonding strength of the liquid crystal panel and the backlight module is further improved. Compared with the prior art, the liquid crystal display device provided by the invention has the advantages that the original lower polarizing plate only needs to be extended for a certain length in the horizontal direction, and the sizes of other components are not required to be changed, so that the assembly time and the manufacturing cost of the liquid crystal display device are not basically increased.
Drawings
The various aspects of the present invention will become more apparent to the reader after reading the detailed description of the invention with reference to the attached drawings. Wherein,
FIG. 1 is a schematic cross-sectional view of a prior art LCD device in which an LCD panel is bonded to a backlight module; and
FIG. 2 is a cross-sectional view of a liquid crystal panel bonded to a backlight module according to an embodiment of the present invention.
Detailed Description
In order to make the present disclosure more complete and complete, reference is made to the accompanying drawings, in which like references indicate similar or analogous elements, and to the various embodiments of the invention described below. However, it will be understood by those of ordinary skill in the art that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for illustrative purposes and are not drawn to scale.
FIG. 1 is a schematic cross-sectional view of a prior art LCD device in which an LCD panel is bonded to a backlight module.
Referring to fig. 1, the liquid crystal display device includes a liquid crystal panel 103, a backlight assembly 20, an upper polarizing plate 101 positioned above the liquid crystal panel 103, and a lower polarizing plate 105 positioned below the liquid crystal panel 103. The lower polarizing plate 105 and the upper polarizing plate 101 may be made of the same material, and the length of the lower polarizing plate 105 is equal to that of the upper polarizing plate 101, that is, the leftmost end of the upper polarizing plate 101 and the leftmost end of the lower polarizing plate 105 are located on the same straight line in the vertical direction, and the rightmost end of the upper polarizing plate 101 and the rightmost end of the lower polarizing plate 105 are located on the same straight line in the vertical direction. In addition, the liquid crystal panel 103 may include a liquid crystal layer, a color filter glass substrate above the liquid crystal layer, and a thin film transistor array glass substrate below the liquid crystal layer.
It should be understood that the polarizer is an important element of the liquid crystal display device, and has a fixed polarizing axis or light absorption axis. The polarizer mainly functions to allow only light having a vibration direction identical to or parallel to a polarization axis direction thereof to pass therethrough, and to shield light having a vibration direction perpendicular to the polarization axis direction thereof by absorption, reflection, scattering, and the like, to provide necessary display characteristics of the liquid crystal display device. For example, after being guided by the light guide plate, light emitted from the backlight enters the lower polarizer 105 (also referred to as an entrance polarizer or polarizer) below the liquid crystal panel 103, so that light with a vibration direction perpendicular to the polarization axis of the lower polarizer 105 is filtered, and only light with a vibration direction that is the same as or parallel to the polarization axis of the lower polarizer 105, that is, linearly polarized light, remains. The linearly polarized light passes through the liquid crystal panel 103 and then exits through the upper polarizing plate 101 (which may also be referred to as an exit polarizing plate or an analyzer).
The backlight module 20 includes a plastic frame, a back plate connected to the plastic frame, a light source, and a light guide plate for guiding light emitted from the light source. As shown in fig. 1, the rubber frame includes a first vertical portion 201 and a second vertical portion 203, and the first vertical portion 201 and the second vertical portion 203 are disposed opposite to each other.
In order to cope with the narrowing of the frame of the lcd panel, the backlight module 20 removes the dam wall of the plastic frame portion to reduce the thickness of the frame. More specifically, the fixed connection between the liquid crystal panel 103 and the backlight module 20 is realized by an adhesive layer. For example, the adhesive layer is a double-sided tape having a first adhesive tape portion 205 and a second adhesive tape portion 207 opposite to each other, wherein the first adhesive tape portion 205 corresponds to the first vertical portion 201 of the frame, and the lower polarizer 105 is adhered to the first vertical portion 201 by the first adhesive tape portion 205. The second adhesive tape portion 207 corresponds to the second vertical portion 203 of the frame, and the lower polarizer 105 is adhered to the second vertical portion 203 by the second adhesive tape portion 207.
However, as mentioned above, in the liquid crystal display device of fig. 1, the problem of adhesion strength between the liquid crystal panel 103 and the backlight module 20 tends to occur. Particularly, when a drop test is performed before the product leaves the factory, the liquid crystal panel 103 and the backlight module 20 are easily separated due to insufficient adhesion. As can also be seen from fig. 1, the effective bonding area of the first tape portion 205 and the lower polarizing plate 105 is only L1 in length. On the left side of the effective bonding area, the first tape portion 205 is bonded only to the first vertical portion 201 of the frame and does not contact the lower polarizer 105. On the right side of the effective bonding area, the first tape portion 205 is only bonded to the lower polarizer 105 but does not contact the first vertical portion 201 of the frame, so that neither the tape portion on the left side of the effective bonding area nor the tape portion on the right side of the effective bonding area can fix the backlight module 20 and the liquid crystal panel 103.
In order to effectively solve the problem of weak bonding strength, fig. 2 is a schematic cross-sectional view illustrating a liquid crystal panel and a backlight module bonded together according to an embodiment of the liquid crystal display device of the invention.
Referring to fig. 2, the liquid crystal display device includes a liquid crystal panel 103, a backlight assembly 20, an upper polarizing plate 101 positioned above the liquid crystal panel 103, and a lower polarizing plate 107 positioned below the liquid crystal panel 103. The backlight module 20 includes a plastic frame, a back plate connected to the plastic frame, a light source, and a light guide plate for guiding light emitted from the light source. As shown in fig. 2, the rubber frame includes a first vertical portion 201 and a second vertical portion 203, and the first vertical portion 201 and the second vertical portion 203 are disposed opposite to each other.
Since the upper polarizer 101, the liquid crystal panel 103, the first vertical portion 201 of the rubber frame, and the second vertical portion 203 of the rubber frame in fig. 2 are the same as or similar to those in fig. 1, for convenience of description, the descriptions thereof are omitted.
It is to be noted that, in the liquid crystal display device of the present invention, the lower polarizer 107 is bonded to the first vertical portion 201 through the first tape portion 209 of the double-sided tape layer (such as a light shielding tape), the lower polarizer 107 is bonded to the second vertical portion 203 through the second tape portion 211 of the double-sided tape layer, and the horizontal projection of the lower polarizer 107 completely covers the double-sided tape layer. That is, when the vertical light irradiates the lower polarizing plate 107 and the double-sided tape layer downward, the leftmost end of the lower polarizing plate 107 is positioned outside the leftmost end of the double-sided tape layer, and the rightmost end of the lower polarizing plate 107 is positioned outside the rightmost end of the double-sided tape layer.
As can also be seen from fig. 2, the effective bonding area of the first tape portion 209 and the lower polarizing plate 107 has a length L2. In contrast to fig. 1, the effective bonding area of the first tape portion 209 of fig. 2 is only a small portion of the right side thereof bonded to the lower polarizing plate 107 without contacting the first vertical portion 201. Since the first adhesive tape portion 209 is not exposed on the left side of the leftmost end of the lower polarizer 107, the effective bonding area of the first adhesive tape portion 209 for bonding the lower polarizer 107 and the first vertical portion 201 is much larger than that of fig. 1, so that the bonding strength between the liquid crystal panel 103 and the backlight module 20 can be significantly increased.
In one embodiment, the horizontal projection of the lower polarizer 107 of the liquid crystal panel 10 has a first length L3, the horizontal projection of the upper polarizer 101 has a second length L4, and the first length L3 is greater than the second length L4. That is, the leftmost end of the upper polarizing plate 101 and the leftmost end of the lower polarizing plate 107 are not in the same straight line in the vertical direction, and the rightmost end of the upper polarizing plate 101 and the rightmost end of the lower polarizing plate 107 are not in the same straight line in the vertical direction, and in more detail, the lower polarizing plate 107 extends a certain length on each of the left and right sides thereof with respect to the upper polarizing plate 101, so as to increase the area of the effective bonding region of the double-sided tape layer and the lower polarizing plate 107. Further, the horizontal projection length of the liquid crystal layer of the liquid crystal panel 103 is greater than the second length L4 and less than the first length L3.
By adopting the liquid crystal display equipment, the lower polarizing plate and the rubber frame of the backlight module are bonded through the double-sided adhesive tape layer, and the horizontal projection of the lower polarizing plate completely covers the double-sided adhesive tape layer, so that the bonding area of the rubber frame and the lower polarizing plate can be increased, and the bonding strength of the liquid crystal panel and the backlight module is further improved. Compared with the prior art, the liquid crystal display device provided by the invention has the advantages that the original lower polarizing plate only needs to be extended for a certain length in the horizontal direction, and the sizes of other components are not required to be changed, so that the assembly time and the manufacturing cost of the liquid crystal display device are not basically increased.
Hereinbefore, specific embodiments of the present invention are described with reference to the drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present invention without departing from the spirit and scope of the invention. Such modifications and substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (6)
1. A liquid crystal display device comprises a liquid crystal panel, a lower polarizing plate arranged below the liquid crystal panel and a backlight module, and is characterized in that the backlight module comprises a rubber frame, the lower polarizing plate and the rubber frame are bonded through a double-sided adhesive tape layer,
wherein the horizontal projection of the lower polarizing plate completely covers the double-sided adhesive tape layer.
2. The apparatus of claim 1, further comprising an upper polarizer disposed opposite the lower polarizer, wherein a horizontal projection of the lower polarizer has a first length and a horizontal projection of the upper polarizer has a second length, and wherein the first length is greater than the second length.
3. The liquid crystal display device of claim 2, wherein the liquid crystal panel further comprises a liquid crystal layer disposed between the upper polarizer and the lower polarizer, and a horizontal projection length of the liquid crystal layer is greater than the second length and less than the first length.
4. The liquid crystal display device of claim 1, wherein the frame has a first vertical portion and a second vertical portion opposite to each other, and the double-sided tape layer has a first tape portion and a second tape portion opposite to each other, wherein the lower polarizer is bonded to the first vertical portion by the first tape portion and bonded to the second vertical portion by the second tape portion.
5. The liquid crystal display device of claim 1, wherein the double-sided tape layer is a light-shielding tape.
6. The liquid crystal display device of claim 1, wherein the liquid crystal display device is a narrow bezel liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210352841 CN102866518A (en) | 2012-09-20 | 2012-09-20 | Liquid crystal display equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210352841 CN102866518A (en) | 2012-09-20 | 2012-09-20 | Liquid crystal display equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102866518A true CN102866518A (en) | 2013-01-09 |
Family
ID=47445475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210352841 Pending CN102866518A (en) | 2012-09-20 | 2012-09-20 | Liquid crystal display equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102866518A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137646A (en) * | 2015-09-28 | 2015-12-09 | 厦门天马微电子有限公司 | LCD panel and LCD module |
| CN109143686A (en) * | 2018-09-30 | 2019-01-04 | 厦门天马微电子有限公司 | A kind of backlight module, display module and electronic equipment |
-
2012
- 2012-09-20 CN CN 201210352841 patent/CN102866518A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137646A (en) * | 2015-09-28 | 2015-12-09 | 厦门天马微电子有限公司 | LCD panel and LCD module |
| CN105137646B (en) * | 2015-09-28 | 2019-01-15 | 厦门天马微电子有限公司 | A kind of liquid crystal display panel and liquid crystal display die set |
| CN109143686A (en) * | 2018-09-30 | 2019-01-04 | 厦门天马微电子有限公司 | A kind of backlight module, display module and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130109 |