CN210666272U

CN210666272U - Backlight module and liquid crystal panel

Info

Publication number: CN210666272U
Application number: CN201922009873.XU
Authority: CN
Inventors: 阿内伟博
Original assignee: Faytech Tech (shenzhen)co Ltd
Current assignee: Faytech Tech (shenzhen)co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-06-02
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a backlight module and liquid crystal display panel, backlight unit includes: at least two light collectors, wherein at least one light collector is used for collecting light rays emitted by the LED lamp, and at least one light collector is used for collecting sunlight rays; the light-incoming end of one group of light-conducting beams is connected with one light collector, and the light-outgoing end is arranged on the side edge of the light guide plate; the back plate is provided with a containing cavity; the light guide plate is arranged in the accommodating cavity, the two opposite sides of the light guide plate are light incident surfaces, the top surface is a light emergent surface, and the bottom surface is a reflection mesh point surface. The backlight module is characterized in that the LED lamp is arranged outside the backlight module, and the LED lamp with relatively large size and high brightness can be used, so that the characteristic of keeping high brightness under the condition of an extremely thin and narrow frame is realized; the temperature of the LED lamp does not affect the liquid crystal panel any more, and meanwhile, sunlight can be effectively utilized to form a backlight source, so that the brightness of the liquid crystal panel can be improved, and the reading performance/contrast ratio can be obviously improved.

Description

Backlight module and liquid crystal panel

Technical Field

The utility model relates to a liquid crystal display panel's backlight technical field, more specifically relates to a backlight unit and liquid crystal display panel.

Background

In a typical assembly, the LED lamp is directly opposite to the light guide plate and mounted inside the backlight module. Because the LED lamp can generate high heat in the light emitting process, the heat can influence the display of the liquid crystal panel, and particularly the high-brightness LED lamp is more obvious; and the LED lamp of formula backlight unit is gone into to the side is generally laminated on the backplate curb plate, and the inherent width of LED lamp has just further restricted backlight unit and can't make ultra-thin design. Moreover, the reading performance and contrast of the liquid crystal panel can be reduced under strong sunlight by the existing liquid crystal panel adopting the lateral backlight module, and the use experience is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a backlight module and a liquid crystal panel in order to solve the above technical problems, in which the backlight module arranges LED lamps outside the backlight module, and guides light into the light guide plate through light guide fibers, so that the size of the LED lamps is independent of the thickness of the backlight module and the liquid crystal panel, and there is no direct association therebetween, so that the liquid crystal panel with an extremely thin and narrow frame can be designed, and at the same time, the LED lamps with relatively large size and high brightness can be used, thereby achieving the characteristic of maintaining high brightness under the condition of the extremely thin and narrow frame; moreover, the LED lamp is moved out of the backlight module, the temperature does not affect the liquid crystal panel any more, and meanwhile, the LED is easier to radiate outside the backlight module than inside the display screen; meanwhile, sunlight can be effectively utilized to form a backlight source, the brightness of the liquid crystal panel can be improved, and the reading performance/contrast ratio can be obviously improved.

In order to solve the technical problem, the utility model provides a backlight module and liquid crystal display panel has adopted following technical scheme:

a backlight module, comprising:

at least two light collectors, wherein at least one light collector is used for collecting light rays emitted by the LED lamp, and at least one light collector is used for collecting sunlight rays;

the light-incoming end of one group of light-conducting beams is connected with one light collector, and the light-outgoing end is arranged on the side edge of the light guide plate;

the back plate is provided with a containing cavity;

the light guide plate is arranged in the accommodating cavity, the two opposite sides of the light guide plate are light incident surfaces, the top surface is a light emergent surface, and the bottom surface is a reflection mesh point surface.

As the utility model provides an improvement of backlight unit, each the leaded light bundle includes two piece at least leaded light optic fibre.

As the utility model provides an improvement of backlight unit, the light-emitting end of leaded light optic fibre sets up to the polygon casing.

As the utility model provides an improvement of backlight unit, the longitudinal section of polygon casing is any kind of square, pentagon and hexagon.

As the utility model provides a backlight unit's an improvement, the polygon casing is kept away from the light-emitting end is equipped with the spacing ring.

As an improvement of the backlight module provided by the present invention, a plurality of through holes are provided in the side plate of the back plate, so that the light-emitting end of the light guide fiber passes through the through holes.

As a modified backlight unit, the income plain noodles of light guide plate is provided with location elastic arm for location and spacing leaded light optic fibre's play light end.

As a modification of the backlight module provided in the present invention, the light incident surface of the light guide plate is provided with an entrance prism, which corresponds to the light emitting end.

As the utility model provides an improvement of backlight unit, the play plain noodles top of light guide plate still is provided with the blooming, the reflection mesh point face below of light guide plate still is provided with the reflector plate.

A liquid crystal panel comprises the backlight module and a liquid crystal module arranged above the backlight module.

Compared with the prior art, the utility model discloses there is following beneficial effect:

(1) the utility model provides a backlight module sets up the LED lamp in backlight module's outside, leads into the light guide plate through leaded light optic fibre with the light, so design the size of LED lamp and backlight module and liquid crystal panel thickness mutually independent, do not have direct correlation, then can design into the liquid crystal display panel of extremely thin extremely narrow frame, still can use the LED lamp great relatively and luminance is higher simultaneously, realize keeping the characteristic of hi-lite under the extremely thin extremely narrow frame condition; moreover, the LED lamp is moved out of the backlight module, the temperature does not affect the liquid crystal panel any more, and meanwhile, the LED is easier to radiate outside the backlight module than inside the display screen; meanwhile, sunlight can be effectively utilized to form a backlight source, the brightness of the liquid crystal panel can be improved, and the reading performance/contrast ratio can be obviously improved.

(2) A polygonal shell is additionally arranged at the light outlet end of the light guide fiber, so that the light outlet end is prevented from rotating to influence the light outlet quality; the tail part of the polygonal shell is additionally provided with a limiting ring so that the light outlet end of each light guide fiber can be accurately positioned and fixed on the side plate of the back plate, the consistent insertion amount of each light guide fiber of the same side plate is ensured, and the light outlet quality is further ensured.

(3) The light guide plate is characterized in that the light incident surface of the light guide plate is additionally provided with a positioning elastic arm for positioning and limiting the light emitting end of the light guide fiber, so that the light guide fiber is prevented from axially moving, the light emitting end is ensured to be opposite to the light incident surface, and the high light energy utilization rate of the fiber is further improved.

Drawings

In order to illustrate the present application or prior art more clearly, a brief description of the drawings needed for the description of the embodiments or prior art will be given below, it being clear that the drawings in the following description are some embodiments of the present application and that other drawings can be derived from them by a person skilled in the art without inventive effort.

Fig. 1 is a schematic structural view of a backlight module according to the present invention;

FIG. 2 is a partially exploded view of the backlight module of the present invention;

fig. 3 is a partial cross-sectional view of the light-guiding fiber light-emitting end, the back plate side plate and the light-guiding plate in the backlight module of the present invention;

fig. 4 is another partial cross-sectional view of the light guide plate, the back plate side plate and the light exit end of the light guide fiber in the backlight module of the present invention;

fig. 5 is a partial side view of the light incident surface of the light guide plate in the backlight module of the present invention.

The light guide plate comprises a light collector 1, a light guide beam 2, a back plate 3, an accommodating cavity 4, a light guide plate 5, an LED lamp 6, sunlight rays 7, an optical fiber core 8, a cladding 9, a light incoming surface 10, a polygonal shell 11, a through hole 12, a limiting ring 13, an inlet prism 14, a positioning elastic arm 15, a reflector plate 16 and a liquid crystal module 17.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, a backlight module includes: the light source device comprises at least two light collectors 1 for collecting different light sources, at least two groups of light guide beams 2 connected with the light collectors 1, a back plate 3 with a containing cavity 4 and a light guide plate 5 arranged in the containing cavity 4.

The light collector 1 is used for collecting light rays emitted by the LED lamp 6, the light collector 1 is used for collecting sunlight rays 7, and the light collector 1 has a light inlet end of a light guide optical fiber which has the function of collecting and converging light rays and guiding the light rays into the light guide bundle 2.

It can be understood that, the light collector 1 of the LED lamp 6 may be an optical lens integrated on the LED lamp 6, or an optical lens connected to the light-entering end of the light guide beam 2; as the light collector 1 for sunlight, there may be a light collector 1 including an optical lens and a light sensor for sensing light to control the light collector 1 to rotate corresponding to the sunlight light source.

Each light guide bundle 2 includes two piece at least leaded light optic fibre, many but leaded light optic fibre's income light end integrated cladding is in the same place, be convenient for with light collector 1 connects, many leaded light optic fibre's play light end then is the disconnect-type, is convenient for connect and is fixed in on the curb plate of backplate 3, with the income plain noodles 10 of light guide plate 5 corresponds the setting.

Preferably, as shown in fig. 3 and 4, the light guiding fiber of the present embodiment includes a fiber core 8 and a cladding 9, the fiber core 8 may be made of, for example, quartz or PMMA, for guiding light; the cladding 9 may be made of a hard polymer and is used to clad the fiber core 8.

The back plate 3 comprises a bottom plate and four side plates vertically connected with the periphery of the bottom plate, and the bottom plate and the four side plates form an accommodating cavity 4 in an enclosing mode. The back plate 3 is a light-tight back plate 3, and the material of the back plate can be plastic or metal.

The light guide plate 5 is arranged in the accommodating cavity 4, two opposite sides of the light guide plate 5 are light incident surfaces 10, the top surface is a light emergent surface, and the bottom surface is a reflection mesh surface. The light from the light-emitting end of the light-guiding fiber is guided into the light-guiding plate 5 from the light-in surface 10, and is reflected by the surface with reflective dots and emitted from the light-out surface, thereby providing the required light source for the liquid crystal panel.

Through the design, the utility model provides a backlight module sets up LED lamp 6 in backlight module's outside, leads into light guide plate 5 through leaded light optic fibre with the light, so design the size of LED lamp 6 and backlight module and liquid crystal display panel thickness be mutually independent, do not have direct relevance, then can design into the liquid crystal display panel of extremely thin extremely narrow frame, still can use the LED lamp 6 that relatively great and luminance is higher simultaneously, realize keeping the characteristic of hi-lite under the extremely thin extremely narrow frame condition; moreover, the LED lamp 6 is moved out of the backlight module, the temperature does not affect the liquid crystal panel any more, and meanwhile, the LED is easier to radiate outside the backlight module than inside the display screen; meanwhile, sunlight can be effectively utilized to form a backlight source, the brightness of the liquid crystal panel can be improved, and the reading performance/contrast ratio can be obviously improved. The utility model discloses a light guide plate 5 of two sides income light has realized the beneficial effect that 5 luminance homogeneity of light guide plate is better, luminance is high, has overcome simultaneously and has kept away from the light guide plate 5 that the unilateral goes into the light source among the prior art along with energy loss, luminance is on the low side, can't satisfy the shortcoming of the clear demonstration requirement of user high resolution and superelevation.

As shown in fig. 3 and 4, the light-emitting end of the light-guiding fiber is a polygonal housing 11, and the longitudinal section of the polygonal housing 11 is any one of a square, a pentagon and a hexagon, but is not limited thereto. A plurality of through holes 12 are formed in the side plate of the back plate 3, so that the light outlet end of the light guide optical fiber can conveniently pass through the through holes, and preferably, the through holes 12 are matched with the polygonal shell 11. The polygonal shell 11 is additionally arranged at the light outlet end of the light guide fiber, so that the light outlet end is prevented from rotating to influence the light outlet quality.

Furthermore, a limit ring 13 is arranged on one side of the polygonal shell 11, which is far away from the light outlet end, and the limit ring 13 is additionally arranged at the tail of the polygonal shell 11, so that the light outlet end of each light guide fiber can be accurately positioned and fixed on the side plate of the back plate 3, the consistent insertion amount of each light guide fiber of the same side plate is ensured, and the light outlet quality is further ensured.

Furthermore, as shown in fig. 4 and 5, a positioning elastic arm 15 may be additionally disposed on the light incident surface 10 of the light guide plate 5 for positioning and limiting the light emitting end of the light guide fiber, mainly positioning and limiting the polygonal housing 11, so as to avoid axial movement of the light guide fiber, and simultaneously ensure that the light emitting end is directly opposite to the light incident port of the light incident surface 10, thereby further improving the high light energy utilization rate of the fiber.

Further, the light incident surface 10 of the light guide plate 5 is provided with an entrance prism 14 corresponding to the light emitting end. The entrance prism 14 is the bellied smooth curved surface in the outside of light guide plate 5, can regard as convex lens, will diminish from the diffusion angle of light-emitting end incident light, play the light and assemble the effect, the diffusion angle of light in light guide plate 5 diminishes, in the part that is close to the light-emitting end, the light of reflection mesh point face to the light guide plate 5 lower surface reduces, thereby eliminated and be close to the distolateral bright spot of light-emitting on the light guide plate 5, normally solved and adopted high luminance LED lamp 6 easily to produce the problem of local bright spot.

In a preferred embodiment, an optical film is further disposed above the light exit surface of the light guide plate 5, and a reflective sheet 16 is further disposed below the reflective mesh surface of the light guide plate 5. Further improve the light-emitting quality of the backlight module.

The utility model also provides a liquid crystal display panel, it includes as above-mentioned backlight unit and sets up the liquid crystal module 17 of backlight unit top.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims

1. A backlight module is characterized by comprising:

the back plate is provided with a containing cavity;

2. The backlight module according to claim 1, wherein each of the light guide bundles comprises at least two light guide fibers.

3. The backlight module according to claim 2, wherein the light-emitting end of the light guide fiber is arranged as a polygonal housing.

4. The backlight module according to claim 3, wherein the polygonal housing has a longitudinal section of any one of a square, a pentagon and a hexagon.

5. The backlight module according to claim 3, wherein the polygonal housing is provided with a limiting ring away from the light-emitting end.

6. The backlight module according to claim 1, 3 or 5, wherein the side plate of the back plate is provided with a plurality of through holes for the light-emitting ends of the light guide fibers to pass through.

7. The backlight module as claimed in claim 6, wherein the light incident surface of the light guide plate is provided with a positioning elastic arm for positioning and limiting the light emergent end of the light guide fiber.

8. The backlight module as claimed in claim 7, wherein the light incident surface of the light guide plate is provided with an entrance prism corresponding to the light emergent end.

9. The backlight module as claimed in claim 1, wherein an optical film is further disposed above the light-emitting surface of the light guide plate, and a reflective sheet is further disposed below the reflective mesh surface of the light guide plate.

10. A liquid crystal panel comprising the backlight module according to any one of claims 1 to 9 and a liquid crystal module disposed above the backlight module.