CN100378527C - Liquid crystal display module and its backlight module - Google Patents

Abstract

The invention provides a backlight module, which comprises a frame, a surface light source, an optical film and a polarizer. The surface light source, the optical film and the polaroid are fixed in or on the frame, and the polaroid is positioned on the optical film. The invention further provides a liquid crystal display module, which comprises the backlight module, a liquid crystal display panel and a second polarizer. The backlight module further comprises a first polarizer, the liquid crystal display panel is arranged above the first polarizer, and the second polarizer is arranged on the liquid crystal display panel. In the liquid crystal display module, the first polarizer is not required to be attached to the liquid crystal display panel, so that only the second polarizer is arranged on the liquid crystal display panel, and the display module has good optical characteristics and lower manufacturing cost.

Description

Liquid crystal display module and its backlight module

technical field

The invention relates to a backlight module, and in particular to a backlight module with a polarizer.

Background technique

Since the invention of the first black-and-white television with a cathode ray tube (Cathode Ray Tube, CRT) as the working mode, display technology has been evolving at a rapid pace. However, due to the disadvantages of such a display working in the cathode ray tube mode, such as large volume, heavy weight, high radiation dose, and poor image quality, new technologies for flat panel display technology are constantly being developed. Among these flat-panel display technologies, Liquid Crystal Display (LCD) technology is the most sophisticated and popularized with the advantages of thinness, lightness, power saving, no radiation, full color, and portability. For example, mobile phones, language translators, digital cameras, digital video cameras, personal digital assistants (PDAs), notebook computers and even desktop monitors all have their scope of application.

Please refer to FIG. 1 , which is a schematic diagram of a conventional liquid crystal display module. The liquid crystal display module 100 is mainly composed of a backlight module 110 , a first polarizer 118 , a second polarizer 130 and a liquid crystal display panel 120 (details will be described later). Regardless of whether it is a transmissive or transflective liquid crystal display module 100, the liquid crystal display panel 120 must be illuminated through the surface light source provided by the backlight module 110, so that the liquid crystal display module 100 can achieve the desired effect of display. Effect.

It should be noted that the first polarizer 118 and the second polarizer 130 are respectively attached to the upper surface and the lower surface of the liquid crystal display panel 120 by using an adhesive. Therefore, when the surface light source provided by the backlight module 110 When penetrating through the liquid crystal display panel 120 , the adhesive coated on the upper surface and the lower surface of the liquid crystal display panel 120 will affect the transmittance of the surface light source, thereby reducing the brightness of the liquid crystal display module 100 . In addition, during the manufacturing process, the polarizer will be attached to the surface of the liquid crystal display panel 120 in a bottom-up manner as much as possible, and the attraction of gravity will be used to reduce the number of particles attached to the liquid crystal display panel 120, but the actual In general, it is easier to adhere to the particles by using an adhesive. If the number of particles is too large, there may be air bubbles or too many particles between the glass substrate 112 and the polarizer, which requires rework. Furthermore, it is difficult to control the positioning accuracy of manual attachment, which will increase the probability of rework.

Generally, when the liquid crystal display panel 120 is reworked, the failed polarizer and the liquid crystal display panel 120 must be heated on a hot plate to tear off the polarizer, and then the surface of the liquid crystal display panel 120 is cleaned with a solvent, such as alcohol. Or other appropriate solvents, this heavy process not only increases the cost but also takes time and effort, and is not conducive to the overall production capacity (throughput).

It can be seen that the above-mentioned existing liquid crystal display module and its backlight module obviously still have inconveniences and defects in structure and use, and need to be further improved urgently. In order to solve the problems existing in liquid crystal display modules and their backlight modules, relevant manufacturers have tried their best to find solutions, but for a long time no suitable design has been developed, and general products have no suitable structure to Solve above-mentioned problem, this obviously is the problem that relevant industry is eager to solve.

In view of the defects in the above-mentioned existing liquid crystal display module and its backlight module, the inventor actively researches and innovates based on years of rich practical experience and professional knowledge in the design and manufacture of this type of product, and cooperates with the application of academic theory. The creation of a liquid crystal display module and its backlight module with a new structure can improve the general existing liquid crystal display module and its backlight module, making it more practical. Through continuous research, design, and after repeated trial samples and improvements, the present invention with practical value is finally created.

Contents of the invention

The purpose of the present invention is to overcome the defects of the existing liquid crystal display module and its backlight module, and provide a new liquid crystal display module and its backlight module. The technical problem to be solved is to make the liquid crystal The manufacturing cost of the display panel is reduced and rework is easy, so it is more suitable for practical use.

Another object of the present invention is to provide a liquid crystal display module. The technical problem to be solved is to make it have better optical characteristics, so that it is more suitable for practical use.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. A backlight module proposed according to the present invention includes: a frame; a light source fixed in the frame; an optical film fixed on the frame and positioned on the light source; and a polarized light source The sheet is fixed on the above-mentioned frame and located on the above-mentioned optical film.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned backlight module, the surface light source includes: a light guide plate; and a line light source arranged beside the above light guide plate.

The aforementioned backlight module, wherein the frame has a first fixing portion, and the above-mentioned optical film has a second fixing portion fixed on the first fixing portion, and the above-mentioned polarizer has a second fixing portion fixed on the first fixing portion. A third fixing part of the fixing part.

In the aforementioned backlight module, the optical film includes a diffusion film, a brightness enhancement film, a prism film or a combination of these films.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. A liquid crystal display module proposed according to the present invention, which includes: a backlight module, including: a frame; a light source on one side, fixed in the above frame; an optical film, fixed on the above frame, and located on the above on the surface light source; a first polarizer, fixed on the above-mentioned frame, and located on the above-mentioned optical film; a liquid crystal display panel, configured above the first polarizer of the above-mentioned backlight module; and a second The polarizer is configured on the above-mentioned liquid crystal display panel.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned liquid crystal display module, the surface light source includes: a light guide plate; and a line light source arranged beside the above light guide plate.

The aforementioned liquid crystal display module, wherein said frame has a first fixing portion, and said optical film has a second fixing portion fixed on said first fixing portion, and said first polarizer has a fixing The third fixing part on the first fixing part.

In the aforementioned liquid crystal display module, the optical film includes a diffusion film, a brightness enhancement film, a prism film or a combination of these films.

In the aforementioned liquid crystal display module, the absorption axis of the first polarizer is perpendicular to the absorption axis of the second polarizer.

The aforementioned liquid crystal display module further includes an adhesive layer disposed between the aforementioned second polarizer and the liquid crystal display panel.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. It can be known from the above technical solutions that the present invention provides a backlight module, which includes a frame, a light source on one side, an optical film and a polarizer. Wherein, the surface light source, the optical film and the polarizer are fixed in or on the frame, and the polarizer is located on the optical film. The present invention further provides a liquid crystal display module, which includes the aforementioned backlight module, a liquid crystal display panel and a second polarizer. Wherein, the backlight module further includes a first polarizer, and the liquid crystal display panel is arranged above the first polarizer, and the second polarizer is arranged on the liquid crystal display panel. In the above liquid crystal display module, since the first polarizer does not need to be attached to the liquid crystal display panel, there is only the second polarizer on the liquid crystal display panel, so the display module has good optical properties and low manufacturing cost.

By virtue of the above technical solutions, the liquid crystal display module and its backlight module of the present invention have at least the following advantages:

1. The liquid crystal display panel of the present invention can choose not to use an adhesive to attach the polarizer. Therefore, the manufacturing process has a shorter time and a higher manufacturing yield, and the rework time is also shorter, thereby increasing the production capacity.

2. The liquid crystal display module of the present invention can choose not to use an adhesive layer. Compared with the conventional liquid crystal display module, the liquid crystal display module of the present invention has better optical properties.

3. The liquid crystal display module of the present invention is relatively easy to manufacture, and can further reduce the manufacturing cost.

To sum up, the liquid crystal display module and its backlight module with a special structure of the present invention provide a backlight module, which can reduce the manufacturing cost of the liquid crystal display panel and facilitate rework. In addition, the invention provides a liquid crystal display module, which has better optical properties. It has the above-mentioned many advantages and practical value, and there is no similar structural design publicly published or used in similar products, so it is indeed an innovation. It has great improvements in products and functions, and has a technical advantage. It has made great progress, and has produced easy-to-use and practical effects, and has improved multiple functions compared with the existing liquid crystal display module and its backlight module, so it is more suitable for practical use. It is a novel, progressive and practical new design.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a conventional liquid crystal display module.

FIG. 2A is a schematic diagram of a backlight module according to a first embodiment of the present invention.

FIG. 2B is a schematic structural diagram of the backlight module according to the first embodiment of the present invention.

FIG. 3A is a schematic diagram of a liquid crystal display module according to a second embodiment of the present invention.

FIG. 3B is a schematic diagram of a backlight module according to a second embodiment of the present invention.

FIG. 3C is a schematic diagram of a backlight module according to a second embodiment of the present invention.

100, 200: LCD module

110, 210, 310: backlight module

118, 218, 318: first polarizer

120, 220: liquid crystal display panel

130, 230: second polarizer

212, 312: frame

212a, 312a: first fixing part

214, 314: optical film

214a, 314a: second fixing part

216, 316: surface light source

216a, 316a: light guide plate

216b, 316b: line light source

218a, 318a: the third fixing part

Detailed ways

In order to further explain the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, the specific implementation and structure of the liquid crystal display module and its backlight module proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , features and their effects are described in detail below.

first embodiment

Please refer to FIG. 2A , which is a schematic diagram of a backlight module according to a first embodiment of the present invention. As shown in FIG. 2A , the liquid crystal display module 200 of this embodiment includes a backlight module 210 , a liquid crystal display panel 220 and a second polarizer 230 (details will be described later). Wherein, the backlight module 210 is disposed under the liquid crystal display panel 220 to provide a stable light source for lighting the liquid crystal display panel 220, and the second polarizer 230 is attached to the liquid crystal display panel 220 for The auxiliary liquid crystal display panel 220 further enables the liquid crystal display module 200 to achieve the display effect.

The aforementioned backlight module 210 includes a frame 212 , one or more optical films 214 , a side light source 216 and a first polarizer 218 . Wherein, the optical film 214, the surface light source 216 and the first polarizer 218 are all fixed in the frame 212. More specifically, the frame 212 is made of plastic, metal or plastic steel, and the optical film 214 is, for example, a diffuser. , a brightness enhancement sheet, a prism sheet or a combination of these films, to increase the brightness and/or uniformity of the liquid crystal display module 200 .

In this embodiment, the surface light source 216 adopts a side-lighting (Side-Lighting) design, for example. Specifically, the surface light source 216 includes a light guide plate 216a and a line light source 216b, and the line light source 216b is disposed beside the light guide plate 216a. Of course, the surface light source 216 can also adopt other types of designs.

Based on the above, the first polarizer 218 is disposed on the optical film 214. In order to enable the first polarizer 218 to be smoothly assembled in the frame 212, in this embodiment, the shape of the first polarizer 218 is designed to be consistent with the optical film. The shape of the sheet 214 is consistent, so that the first polarizer 218 can be assembled together with the optical film 214 . Of course, those skilled in the art can also modify the design of the frame 212 appropriately, as long as the first polarizer 218 and the optical film 214 can be smoothly assembled on the frame, the first polarizer 218 and the optical film are not limited. 214 shape design.

On the other hand, the second polarizer 230 is attached on the liquid crystal display panel 220 by, for example, an adhesive layer, and the absorption axis of the second polarizer 230 is arranged perpendicular to the absorption axis of the first polarizer 218 .

It is worth noting that the first polarizer 218 is not attached to the liquid crystal display panel 220 in an adhesive manner, but is assembled in the frame 212 together with the optical film 214. Regarding the assembly of the optical film 214 and the first polarizer 218 The method will be described in detail later.

Please refer to FIG. 1 and FIG. 2A at the same time. In the conventional liquid crystal display module 100, the first polarizer 118 and the second polarizer 130 are attached to the upper surface and the upper surface of the liquid crystal display panel 120 by an adhesive. On the lower surface, there is no polarizer in the known backlight module 110, however, the present invention is different from the prior known technology in that: the present invention only needs to coat one layer of adhesive layer 220a to place the second The polarizer 230 is attached on the liquid crystal display panel 220 , and the first polarizer 218 is assembled in the frame 212 of the backlight module 210 .

Please refer to FIG. 2B , which is a structural diagram of the backlight module according to the first embodiment of the present invention. As shown in FIG. 2B , the frame 212 of this embodiment has, for example, a first fixing portion 212a, and the first fixing portion 212a is, for example, a fitting groove or other fixings capable of fixing the optical film 214 and the first polarizer. structure. On the other hand, the optical film 214 has, for example, a second fixing portion 214a corresponding to the first fixing portion 212a, and the second fixing portion 214a is, for example, a lug or other shape design. In addition, the first polarizer 218 has, for example, a third fixing portion 218a corresponding to the first fixing portion 212a, and the third fixing portion 218a is a lug or other shape design. It should be noted that, for example, the shape of the optical film 214 may be consistent with the shape of the first polarizer 218 .

When assembling the backlight module 210, first provide a frame 212 with a fitting groove, then assemble the surface light source 216 in the frame 212, and then dispose the optical film 214 on the surface light source 216. The assembly method is, for example, The lug of the optical film 214 is used to engage with the fitting groove of the frame 212 , and the number of the optical film 214 can be properly adjusted according to the required optical characteristics, and is not limited to a single optical film 214 . Next, the first polarizer 218 is assembled in the frame 212 by using the lugs of the first polarizer 218 to engage with the fitting grooves of the frame 212 . So far, the assembly of the backlight module 210 is completed.

As mentioned above, after the assembly of the backlight module 210 is completed, the liquid crystal display panel 220 with the second polarizer 230 attached thereto can be further assembled on the backlight module 210, and finally the backlight is enclosed by a bezel. The module 210, the liquid crystal display panel 220 and the second polarizer 230 are locked into one body.

In addition, the shape, number and position of the above-mentioned lugs and corresponding fitting grooves can be properly adjusted according to the needs of the design, so as to facilitate the stability of the overall structure. 212a is designed as a flange and the second fixing portion 214a and the third fixing portion 218a are designed as a groove corresponding to the first fixing portion 212a. In addition, the optical film 214 , the first polarizer 218 and the frame 212 are, for example, buckled, snapped, fitted, bonded, locked or other ways to achieve the purpose of assembly.

It is worth noting that the first polarizer 218 of this embodiment is positioned in the frame 212 by using the third fixing portion 218a, and is not attached under the liquid crystal display panel 220 by an adhesive, and the liquid crystal display panel 220 is only coated A layer of adhesive layer 220a is used to attach the second polarizer 230 . Therefore, compared with the conventional manufacturing process, the present invention can further shorten the processing time. In addition, when the light source penetrates the liquid crystal display panel 120, it only needs to pass through one adhesive layer 220a, so that the liquid crystal display module 200 has higher display brightness.

As mentioned above, when attaching two layers of polarizers to the conventional liquid crystal display panel 120, as long as one of the upper and lower polarizers fails to be attached, rework must be carried out. If the first polarizer 118 is normally attached However, the attachment of the second polarizer 130 fails. In the rework process, the liquid crystal display panel 120 that has failed to be attached must still be placed on a hot plate for heating, which may make the first polarizer 118 attached normally Air bubbles are generated between the liquid crystal display panels 120 and must be attached again, while the liquid crystal display panel 220 of the present invention only needs to attach a layer of polarizer, so the present invention can greatly reduce the probability of rework, in other words, the present invention The yield rate and production capacity of the manufacturing process can be greatly improved.

second embodiment

Please refer to FIG. 3A , which is a schematic diagram of a liquid crystal display module according to a second embodiment of the present invention. As shown in Figure 3A, this embodiment is similar to the first embodiment, the main differences are:

The second polarizer 230 of the first embodiment is attached to the liquid crystal display panel 220 by an adhesive, but in this embodiment, a fixing frame 240 is used to fix the liquid crystal display panel 220 and the second polarizer 230 together. The material of the frame 240 is, for example, plastic or metal. The second polarizer 230 and the fixing frame 240 are fixed by, for example, snapping, snapping, fitting, locking or other means. Of course, the fixing frame 240 can also be integrally integrated into the on the bezel. Therefore, this embodiment does not need to use an adhesive, and the display brightness of the liquid crystal display module 200 can be improved.

Of course, those who are familiar with this technology, in addition to using the outer frame 212 and the fixing frame 240 of the backlight module 210 to respectively fix the first polarizer 218 and the second polarizer 230, only need to understand the shape of the second polarizer 230 and the shape of the backlight module 210. By appropriately changing the outer frame 212 of the backlight module 210, the first polarizer 218 and the second polarizer 230 can be fixed at the same time only by the outer frame 212 of a single backlight module 210. In any case, as long as the purpose of positioning the first polarizer 218 and the second polarizer 230 can be achieved, the design style of the frame is not limited.

Please refer to FIG. 3B , which is a schematic diagram of a backlight module according to a second embodiment of the present invention. As shown in FIG. 3B, the main differences between the backlight module 310 of this embodiment and the backlight module 210 of the first embodiment are:

In the frame 312 of this embodiment, the first fixing part 312a is a fitting groove with a convex cylinder, and corresponding to the second fixing part 314a and the third fixing part 318a are lugs with a circular hole design. At this time, the lug with a round hole design is used to snap into the fitting groove corresponding to the convex cylinder in the frame 312 , so as to achieve the purpose of positioning the optical film 314 and the first polarizer 318 in the frame 312 .

Please refer to FIG. 3C , which is a schematic view of the backlight module according to the second embodiment of the present invention, which shows one side of the backlight module 310 , and its fixing part follows the method of the first embodiment such as FIG. 2B . It is worth noting that, The surface light source 316 can be designed, for example, as an engaging portion having a shape of a lug, and is adapted to be engaged in an engaging groove of the frame 312 .

In summary, the liquid crystal display module of the present invention has at least the following advantages:

1. The liquid crystal display panel of the present invention can choose not to use an adhesive to attach the polarizer. Therefore, the manufacturing process has a shorter time and a higher manufacturing yield, and the rework time is also shorter, thereby increasing the production capacity.

2. The liquid crystal display module of the present invention can choose not to use an adhesive layer. Compared with the conventional liquid crystal display module, the liquid crystal display module of the present invention has better optical properties.

3. The liquid crystal display module of the present invention is relatively easy to manufacture, and can further reduce the manufacturing cost.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the structure and technical content disclosed above to make some changes or modifications to equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the present invention, Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (10)

1. module backlight is characterized in that it comprises:

One framework;

One area source is fixed in the above-mentioned framework;

One blooming piece is fixed on the above-mentioned framework, and is positioned on the above-mentioned area source; And

One polaroid is fixed on the above-mentioned framework, and is positioned on the above-mentioned blooming piece.

2. module backlight according to claim 1 is characterized in that wherein said area source comprises:

One light guide plate; And

One line source is disposed at by the above-mentioned light guide plate.

3. module backlight according to claim 1, it is characterized in that wherein said framework has one first fixed part, and above-mentioned blooming piece has second fixed part that is fixed in the first above-mentioned fixed part, and above-mentioned polaroid has the 3rd fixed part that is fixed in the first above-mentioned fixed part.

4. module backlight according to claim 1 is characterized in that wherein said blooming piece comprises the combination of diffusion sheet, brightening piece, prismatic lens or those diaphragms.

5. liquid crystal display module is characterized in that it comprises:

One module backlight comprises:

One framework;

One area source is fixed in the above-mentioned framework;

One blooming piece is fixed on the above-mentioned framework, and is positioned on the above-mentioned area source;

One first polaroid is fixed on the above-mentioned framework, and is positioned on the above-mentioned blooming piece;

One display panels is disposed at above first polaroid of above-mentioned module backlight; And

One second polaroid is disposed on the above-mentioned display panels.

6. liquid crystal display module according to claim 5 is characterized in that wherein said area source comprises:

One light guide plate; And

One line source is disposed at by the above-mentioned light guide plate.

7. liquid crystal display module according to claim 5, it is characterized in that wherein said framework has one first fixed part, and above-mentioned blooming piece has second fixed part that is fixed in above-mentioned first fixed part, and the first above-mentioned polaroid has the 3rd fixed part that is fixed in above-mentioned first fixed part.

8. liquid crystal display module according to claim 5 is characterized in that wherein said blooming piece comprises the combination of diffusion sheet, brightening piece, prismatic lens or those diaphragms.

9. liquid crystal display module according to claim 5, the absorption axes that it is characterized in that wherein said first polaroid are vertical with the absorption axes of second polaroid.

10. liquid crystal display module according to claim 5 is characterized in that it more comprises an adhesive coating, is disposed between above-mentioned second polaroid and display panels.

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