CN2696006Y - Structure of light modulation element - Google Patents

Abstract

The utility model relates to a structure of light-adjusting element, mainly provide one kind and can not form the light-adjusting element in bright, dark band region, can distribute the light of light source more effectively. The utility model discloses backlight unit is equipped with a light modulation element at least in the interval department of light source, and the light of light source both sides diffusion sees through even effluvium of orientation diffuser plate behind the appropriate refraction of light modulation element and the reflex action to eliminate the dim area between each light source, effectively solve the well-known LCD module and obviously present the problem in bright, dark area.

Description

The structure of the dimming element

technical field

The utility model relates to the structure of a light-adjusting element, which mainly provides a light-adjusting element that does not form bright and dark bands, and can distribute light from a light source more effectively.

Background technique

As shown in Figure 1A, it is a cross-sectional view of the structure of a backlight module known in general liquid crystal modules. sheet 40, prism sheet 50; reflective polarizer or upper diffusion sheet 60, and liquid crystal panel 70; wherein, each light source 20 can be a straight strip or U-shaped or other continuously bent lamp tubes and laid at appropriate intervals Between the reflector 10 and the diffusion plate 30, the display effect of the liquid crystal module is formed by the light emitted by each light source 20; 1~3 pieces of diffusion sheet, 0~2 sheets of brightness enhancement sheet, 0~1 sheet of reflective polarizer, etc. are matched with each other. The phenomenon of light and dark bands being formed on the liquid crystal module due to the absence of light at the spacer.

Moreover, since the function of the diffuser 30 is only to diffuse the passing light uniformly, it has a limited effect on improving the bright and dark bands of the liquid crystal module. Therefore, some backlight modules deliberately lengthen the gap between the light source 20 and the diffuser 30 , in order to expand the range where each light source 20 enters the diffusion plate 30, and achieve the purpose of reducing the dark zone; however, such a structural design not only has a rather limited effect, but also increases the thickness of the backlight module, which is not compatible with the thinning of the liquid crystal module. Contrary to the original intention of the design.

Furthermore, some backlight modules choose to apply matting treatment on the surface of the diffuser plate, which is to print ink containing silicon dioxide (SiO ₂ ) or titanium dioxide (TiO ₂ ) on the diffuser plate, so that the surface of the diffuser plate is formed. The extinction (astigmatism) function is used to achieve the purpose of reducing the dark zone; however, such an approach not only increases the manufacturing cost of the diffuser plate, but also makes the manufacturing process cumbersome, and it produces a extinction effect after the light is irradiated on the surface of the diffuser plate , the method used to solve the obvious bright and dark bands of the known liquid crystal module is relatively passive and passive, and there is still room for further improvement.

There is also a backlight module as shown in FIG. 1B on the market, wherein several dimming elements 12 are integrally formed on the reflector 10, so that the light from the light source can be reflected by the surface of the highly reflective material of the dimming element 12 itself, so as to Eliminate the dark zone between the light sources; however, the dimming element 12 is made integrally with the reflector 10, and can only perform reflective dimming, and cannot form a refractive or diffuse dimming function.

Utility model content

The utility model relates to the structure of a light-adjusting element, which mainly provides a light-adjusting element that does not form bright and dark bands, and can distribute light from a light source more effectively.

The technical scheme of the utility model is:

A structure of a dimming element, the backlight module of which is sequentially equipped with a reflector, several light sources, a diffusion plate, several optical films, and a liquid crystal panel from the inside to the outside; wherein, each light source is a straight strip or U-shaped or other continuously bent lamp tubes are laid between the reflector and the diffuser at an appropriate interval;

In the backlight module, at least one light adjusting element is provided at the interval between each light source so that the light diffused on both sides of the light source passes through the appropriate refraction and reflection of the light adjusting element and then evenly diffuses toward the diffuser plate.

The dimming element is a solid elongated structural body, or a hollow elongated structural body.

The dimming element is an elongated structural body, and is fixed on the reflector in an adhesive manner.

An interfitting mechanism capable of interfitting with the reflector or the lower mechanism of the reflector is provided on the dimming element.

The fitting mechanism is an elongated structural body made of light-adjusting elements, and positioning pins are provided on the bonding surface of it and the reflector. The positioning hole for fitting and fixing the component and the reflector.

The fitting mechanism is composed of a dimming element, and a locking hole is provided on the bonding surface of it and the reflector, and the lower part of the reflector is correspondingly provided with a positioning hole for the screw to pass through. The component and the reflector are locked and fixed by screws.

Concave-convex patterns are arranged on at least one surface of the dimming element.

The embossed grooves are V grooves, U grooves, C grooves, more than one straight line or curved line or a combination of both.

Curved surfaces with different curvatures are arranged on at least one surface of the dimming element.

The dimming element is a transparent strip structure, or a white strip structure, or a white fog-like strip structure.

At least one surface of the dimming element is subjected to atomization, ink printing treatment or various concave-convex points (such as circular points, rectangular points, rhombus points, polygonal points) are added.

The optical film is composed of a lower diffusion sheet, a prism sheet and a reflective polarizer.

The optical film consists of 1-3 diffusion sheets, 0-2 brightness enhancement sheets, and 0-1 reflective polarizer.

The dimming element is a transparent strip structure or a white strip made of plastic material PC (polycarbonate) or PMMA (polymethyl methacrylate) or PET (polyethylene terephthalate). structure.

The dimming element is a white mist-shaped strip structure made of transparent plastic material PC (polycarbonate) or PMMA (polymethyl methacrylate) with a diffusing agent added.

The structure of the dimming element of the utility model is mainly that at least one dimming element is arranged at the interval of the light source, so that the diffused light on both sides of the light source passes through the proper refraction and reflection of the dimming element and then diffuses uniformly toward the diffusion plate. In order to eliminate the dark bands between the light sources, a more active and positive means can be used to effectively solve the problem of obvious bright and dark bands in the known liquid crystal module, and the light of the light sources can be distributed more effectively.

Description of drawings

1A and B are structural sectional views of a known backlight module;

2 is a cross-sectional view of the backlight module structure of the first embodiment of the present invention;

3 is a cross-sectional view of the backlight module structure of the second embodiment of the present invention;

4 is a cross-sectional view of the backlight module structure of the third embodiment of the present invention;

5 is a cross-sectional view of the backlight module structure of the fourth embodiment of the present invention;

6 is a cross-sectional view of the backlight module structure of the fifth embodiment of the present invention;

7 is a cross-sectional view of the backlight module structure of the sixth embodiment of the present invention;

8A and B are cross-sectional views of the structure of the backlight module according to the seventh embodiment of the present invention.

【Description of figure number】

10. Reflector

11. Positioning hole

12. Dimming components

20. Light source

30. Diffusion plate

40. Lower diffuser

50. Prism sheet

60. Reflective polarizer

70. LCD panel

80. Dimming element

81. Locating pin

82. Locking hole

83. Concave-convex engraving

84. Surface

90, screw

100. Chimeric mechanism

Detailed ways

In order to make your examiner understand the structure and composition of the utility model, as well as the overall operation mode, it is described as follows with the drawings:

The structure of the dimming element of the present invention, the basic structure of the overall backlight module is shown in Figure 2, which is also equipped with a reflector 10, a number of light sources 20, a diffusion plate 30, and a lower diffusion sheet 40 in sequence from the inside to the outside. , prism sheet 50, reflective polarizer or upper diffusion sheet 60, and liquid crystal panel 70; wherein, each light source 20 can be a straight strip or U-shaped or other continuously bent lamp tubes and laid on the reflective Between the cover 10 and the diffusion plate 30 , the display effect of the liquid crystal module is constituted by the light emitted by each light source 20 .

The key point is that the overall backlight module is provided with at least one solid or hollow dimming element 80 at the intervals between the light sources 20. In the embodiment shown in FIG. 2, the dimming element 80 has a long structure. shape, and is fixed on the reflector 10 in an adhesive manner, or as shown in FIG. The light-adjusting element 80 can be fixed on the appropriate position of the reflector 10, and the fitting mechanism 100 in this embodiment is provided with a positioning pin 81 on the bonding surface of the light-adjusting element 80 and the reflector 10, and the reflector 10 is correspondingly provided with a positioning hole 11, so that the dimming element 80 and the reflector 10 can be embedded and fixed, or can be fixed by means of adhesion, fitting or locking screws by adding fitting parts; of course, the The fitting mechanism 100 can also be shown in FIG. 4 , a locking hole 82 is provided on the bonding surface of the dimming element 80 and the reflector 10 , and the reflector 10 is correspondingly provided with a positioning hole 11 for the screw 90 to pass through. , the light adjusting element 80 is locked and fixed with the reflector 10 or the lower mechanism of the reflector 10 by the screw 90 .

Because, the dimmer element 80 of the present invention is arranged at the interval of each light source 20, the light diffused on both sides of the light source 20 passes through the appropriate refraction and reflection of the dimmer element 80 and then diffuses uniformly towards the diffuser plate 30. Therefore, the dark zone formed between the light sources can be eliminated in a more active and positive way, and the light of the light source can be distributed more effectively.

In addition, the dimming element 80 can be made of plastic materials, including but not limited to PC (polycarbonate) or PMMA (polymethyl methacrylate) or PET (polyethylene terephthalate), etc. Or a white strip structure; or a transparent plastic material such as: PC (polycarbonate) or PMMA (polymethyl methacrylate) with a diffusing agent (such as silicon dioxide (SiO ₂ ) or titanium dioxide (TiO ₂ ), etc. ) made of white mist-like strip structure; the dimming elements 80 with different refraction effects can be obtained, and the dimming elements 80 with suitable light transmission effects can be selected according to the actual distance between the light sources 20 of the backlight module, which is indeed practical and applicable. sex.

Furthermore, as shown in FIG. 5 , at least one surface of the dimming element 80 (in this embodiment, the surface of the dimming element 80 facing the diffuser 30 and the light source 20 ) can be further provided with embossed grooves 83 . The groove can be a V groove, a U groove, a C groove, more than one straight line or a curve, or a combination of multiple combinations of the two grooves, or a curved surface 84 with different curvatures is set as shown in Figure 6, and the dimming element 80 can also be made of different curved surfaces. or a flat surface, to produce light-gathering effects by the concave-convex engraving 83 or the convex effect of the curved surface 84, and the different shapes and placement distances of the light sources 20 can be changed depending on the size of the light sources 20 or the distance between the light sources 20, as shown in Figure 7 In addition, according to the different angles of the light source 20, the shape of the dimming element 80 can be continuously made with different appearances or shapes on the same dimming element 80 as shown in Figure 8A and B, so that the light from the light source 20 can be controlled by The light-adjusting element 80 diffuses toward the concave-convex pattern 83 or the curved surface 84 of the diffuser plate 30, which can more effectively solve the problem that the known liquid crystal module clearly presents bright and dark bands; of course, it can also be on at least one surface of the light-adjusting element 80 The same effect can also be achieved by atomizing, ink printing or adding various concave and convex points (such as circular, rectangular, rhombus, polygonal, etc.).

As mentioned above, the utility model provides another preferable and feasible dimming element structure of the liquid crystal module, so an application for a utility model patent is filed according to law; One of the embodiments does not limit the utility model with this. Therefore, all similar and identical structures, devices, and features of the utility model should belong to the creation purpose of the utility model and the protection scope of the patent application.

Claims (15)

1, a kind of structure of Light modulating device, its module backlight are to be equipped with a reflection shield, some light sources, diffuser plate, several pieces of blooming pieces from inside to outside in regular turn, and liquid crystal panel; Wherein, each light source is to be laid between reflection shield and the diffuser plate for the fluorescent tube of vertical bar shape or U type or other continuous bending shapes and with suitable spacing; It is characterized in that:

This module backlight is the Light modulating device that evenly sheds towards diffuser plate after the interval of each light source is provided with a light that makes the diffusion of light source both sides to see through suitable refraction of Light modulating device and reflex at least.

2, the structure of Light modulating device as claimed in claim 1 is characterized in that: this Light modulating device is solid long shape structural feature or is hollow long shape structural feature.

3, the structure of Light modulating device as claimed in claim 1 is characterized in that: this Light modulating device is the structural feature that is long shape, and is fixed on reflection shield with adhesive means.

4, the structure of Light modulating device as claimed in claim 1 is characterized in that: on Light modulating device, be provided with can with the lower mechanisms of reflection shield or reflection shield chimeric chimeric mechanism mutually.

5, the structure of Light modulating device as claimed in claim 4, it is characterized in that: this chimeric mechanism is the structural feature that is long shape by Light modulating device, and be provided with register pin on the binding face of itself and reflection shield, then corresponding being provided with of the lower mechanisms portion product of this reflection shield or reflection shield makes Light modulating device and the fixing pilot hole of reflection shield tabling.

6, the structure of Light modulating device as claimed in claim 4, it is characterized in that: this chimeric mechanism is by Light modulating device, and on the binding face of itself and reflection shield, be provided with locking hole, the lower mechanisms portion product of this reflection shield are then corresponding to be provided with the pilot hole that passes for screw, this Light modulating device and reflection shield by screw mutually interlocking fix.

7, the structure of Light modulating device as claimed in claim 1 is characterized in that: this Light modulating device is laid with concavo-convex rag at least one surface.

8, the structure of Light modulating device as claimed in claim 7 is characterized in that: this concavo-convex rag is the groove of V ditch, U ditch, C ditch, more than one straight line or curve or both matched combined.

9, the structure of Light modulating device as claimed in claim 1 is characterized in that: the curved surface that is laid with different curvature at least one surface of this Light modulating device.

10, the structure of Light modulating device as claimed in claim 1 is characterized in that: this Light modulating device is a transparent rectangular structure or for white rectangular structure or be white vaporific rectangular structure.

11, the structure of Light modulating device as claimed in claim 1 is characterized in that: do atomizing, ink printing processing at least one face of this Light modulating device or set up various sags and crests.

12, the structure of Light modulating device as claimed in claim 1 is characterized in that: this blooming piece is that the following diffusion sheet, prismatic lens, the reflecting polarized wafer that set are in regular turn from inside to outside formed.

13, the structure of Light modulating device as claimed in claim 1 is characterized in that: this blooming piece is 1～3 the diffusion sheet that sets in regular turn from inside to outside, 0～2 brightening piece, 0～1 reflecting polarized wafer composition.

14, the structure of Light modulating device as claimed in claim 1 is characterized in that: this Light modulating device is by plastic material polycarbonate or polymetylmethacrylate or made transparent rectangular structure or the white rectangular structure of polyethylene terephtalate.

15, the structure of Light modulating device as claimed in claim 1 is characterized in that: this Light modulating device is to add the made white vaporific rectangular structure of diffusant by clear plastic material polycarbonate or polymetylmethacrylate.

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