JP3213629U - Backlight module and display module - Google Patents

Abstract

The present invention provides a backlight module and a display module. A backlight module has a light guide plate body 11 having a reflective surface 100 and a light exit surface 101, and a core layer 12 attached to the light exit surface 101 of the light guide plate body 11 for outputting polarized light. The polarizing light guide plate 10, the prism sheet 20 having a plurality of prisms 21 facing the core layer 12 on one surface, and the reflecting plate 30 disposed on the reflecting surface 100 of the light guide plate body 11. [Selection] Figure 2

Description

  The present invention relates to a backlight module and a display module. In particular, the present invention relates to a backlight module and a display module in which a light guide plate has an optical polarization function.

  As shown in FIG. 1, the backlight module of the conventional liquid crystal display mainly includes a light guide plate 11 having a flat plate shape, a prism sheet 20, a brightness enhancement film 200, and a reflection plate 30. The plate 30 is located on one side of the light guide plate 11, and the light beam is reflected by the reflection plate 30 and enters the light guide plate 11, and then proceeds in a total reflection manner on the light guide plate 11. At this time, after the total reflection is destroyed by the reflection structure installed on the back surface of the light guide plate 11, the light can be emitted from the light exit surface of the light guide plate 11. This is a principle that the conventional prism sheet 20 emits light by primary refraction when the non-polarized light beam is unpolarized light and is emitted upward to the conventional prism sheet 20. The direction of Sensitive to the optical axis of the substrate Zumushito 20, omnidirectional, beam of unpolarized light is underutilized. As a result, the light usage rate of the entire backlight module was relatively lowered for the above reason. For this reason, the structure of the conventional backlight module must be further improved so as to generate polarized light applicable to the prism sheet 20.

  In view of the drawbacks of the prior art, the present invention mainly aims to provide a backlight module, and the light beam emitted from the light guide plate is polarized by improving the internal structure and configuration of the backlight module. To reduce the overall thickness and manufacturing cost of the backlight module, thereby further reducing the manufacturing cost and thickness of the backlight module. It is possible to achieve the purpose of achieving both the design structure of the display.

  In order to achieve the above object and other objects, the backlight module of the present invention has a light guide plate body having a reflective surface and a light exit surface, and a core layer attached to the light exit surface of the light guide plate body, A polarization light guide plate for outputting polarized light, a prism sheet having a plurality of prisms facing the core layer on one surface, and a reflection plate disposed on the reflection surface of the light guide plate body.

  When the backlight module of the present invention is started to be used, the polarizing light guide plate having the core layer allows the light guide plate main body to be formed without the necessity of arranging a conventional brightness enhancement film having an upper surface layer and a lower surface layer. The polarized light is output to the light exit surface, and the polarized light generated by the light guide plate body is improved in the optical polarization effect through the prism sheet corresponding to the optical axis direction, and the backlight module as a whole has excellent light utilization efficiency. When one of the orientation angle of the prism sheet or the angle of protrusion refraction of the plurality of prisms is changed, the present invention also changes the characteristics of the core layer, and the prism Depending on the orientation angle of the sheet or the angle of the projecting refraction angle of the plurality of prisms, polarized light having different characteristics must be generated, that is, the optical polarization light guide having different characteristics. Is by matching the angle of the projection angle of refraction orientation angle or the plurality of prisms of the prism sheet, it must maintain optimum optical polarization effect.

  In addition, since the alignment of the brightness enhancement film is omitted when assembling, the thickness reduction, the reduction of the process, the reduction of the manufacturing cost and the purpose of the design structure of the thin display can be achieved, and the core layer Is interposed between the prism sheet and the light guide plate body of the optical polarization light guide plate, so that the light guide plate body is not damaged when the plurality of prisms of the prism sheet are pressed against the backlight module. Can be protected.

It is a light transmission schematic diagram which shows the backlight module of the liquid crystal display of a prior art. It is a structure schematic diagram which shows the backlight module of this invention. It is a structure schematic diagram which shows the backlight module of this invention. It is a structure schematic diagram which shows the Example of the optical polarization light-guide plate of this invention. It is a structural schematic diagram which shows another Example of the optical polarization light guide plate of this invention. It is a light transmission schematic diagram which shows the backlight module of this invention. 1 is a schematic view showing a structure in which a backlight module and a liquid crystal module of the present invention are combined.

  Hereinafter, embodiments of the present invention will be described by specific specific examples, and those skilled in the art who are familiar with this technology can easily conceive other advantages and effects of the present invention from the contents described in the present invention. it can. The present invention can be implemented or applied in other different specific embodiments, and various details in the specification of the present invention can be variously changed based on various different viewpoints and applications without departing from the spirit of the present invention. Modifications and changes can be made.

  It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are all adapted to the contents posted in the specification so that those skilled in the art can understand and browse. However, the present invention is not intended to limit the conditions under which the present invention can be implemented. Therefore, the present invention has no technical practical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size can be generated by the present invention. As long as the effects and the achievable objectives are not affected, all of them should be included in the comprehensive scope of the technical contents posted by the present invention.

  Hereinafter, a backlight module will be described based on an embodiment of the present invention.

  2 to 7, the backlight module of the present invention includes a light guide plate body 11 having a reflective surface 100 and a light output surface 101, and a core layer 12 attached to the light output surface 101 of the light guide plate body 11. A polarization light guide plate 10 for outputting polarized light, a prism sheet 20 having a plurality of prisms 21 facing the core layer 12 on one surface, and a reflection disposed on the reflection surface 100 of the light guide plate body 11 Plate 30.

  The core layer 12 is formed by removing the upper surface and the lower surface from a conventional brightness enhancement film, and is attached to the light guide plate body 11 by being attached (shown in FIGS. 2 to 4).

  In a possible embodiment, the light exit surface 101 of the light guide plate body 11 is a smooth surface (shown in FIG. 4).

  In another possible embodiment, the light exit surface 101 of the light guide plate body 11 has one of a plurality of light guide structures 102 arranged to extend and project (shown in FIG. 5). ).

  The core layer 12 has a plurality of birefringent polymer layers, the orientation angle of the base material of the prism sheet 20 is 50 degrees, and the protruding refraction angle of the plurality of prisms 21 is 68 degrees. The birefringence polymer layer is at least 300 layers or more.

  As shown in FIG. 7, the present invention further includes a liquid crystal module 300 positioned in front of the backlight module and a display module 400 including the backlight module.

  The backlight module of the present invention can output the polarized light to the light exit surface 101 of the light guide plate body 11 (shown in FIGS. 3 to 6) by the polarization light guide plate 10 having the core layer 12. The conventional brightness enhancement film 200 having an upper surface layer and a lower surface layer is not necessary (shown in FIG. 1), and the polarization generated by the light guide plate body 11 corresponds to the optical axis direction. Through the prism sheet 20, the effect of optical polarization is improved, and the backlight module as a whole helps to have an excellent light utilization effect. The orientation angle of the prism sheet 20 or the protrusion refraction angle of the plurality of prisms 21 When one of the angles is changed, the present invention also changes the characteristics of the core layer 12 together with the orientation angle of the prism sheet 20 or the protrusion bending of the plurality of prisms 21. Depending on the angle of the angle, polarized light having different characteristics must be generated. In other words, the polarization light guide plate 10 having different characteristics has an orientation angle of the prism sheet 20 or a projection refraction angle of the plurality of prisms 21. So that the optimal optical polarization effect must be maintained.

  Further, according to the present invention, when the backlight module is assembled, since a further brightness enhancement film (shown in FIG. 1) is omitted, the thickness is reduced, the process is reduced, and the manufacturing cost is reduced. The purpose of the design structure can be achieved, and since the core layer 12 is interposed between the prism sheet 20 and the light guide plate body 11 of the optical polarization light guide plate 10, the prism sheet 20 When the plurality of prisms 21 are pressed against the backlight module, the light guide plate body 11 can be protected from being damaged.

  Although the embodiments have been described with reference to a number of exemplary examples of the present application, various other modifications and examples can be devised by those skilled in the art, and these modifications and examples are within the spirit and principle of the present application. It should be understood that it falls within the scope. In particular, various changes and modifications can be made to components and / or installations that are installed in accordance with the subject matter within the scope of the present application, drawings, and claims. In addition to changes and modifications made to the components and / or installations, replaceable applications are readily conceivable to those skilled in the art.

10 Polarizing light guide plate,
11 Light guide plate body,
12 core layers,
20 Prism sheet,
21 Prism,
30 reflector,
100 reflective surface,
101 Light exit surface,
102 light guide structure,
200 brightness enhancement film,
300 LCD module,
400 Display module.

Claims (7)

A light guide plate main body having a reflection surface and a light output surface, a core layer attached to the light output surface of the light guide plate main body, and a polarization light guide plate for outputting polarized light,
A prism sheet having a plurality of prisms facing the core layer on one surface;
A reflecting plate disposed on the reflecting surface of the light guide plate body;
A backlight module comprising:   The light output surface of the light guide plate main body is a smooth surface, and has one of a plurality of light guide structures installed to extend and protrude. Backlight module.   The backlight module according to claim 1, wherein the core layer has a plurality of birefringence polymer layers.   The backlight module according to claim 1, wherein an orientation angle of a base material of the prism sheet is 50 degrees.   The backlight module according to claim 1, wherein the plurality of prisms have a protrusion refraction angle of 68 degrees.   The backlight module according to claim 1, wherein the plurality of birefringent polymer layers are at least 300 layers. A liquid crystal module positioned in front of the backlight module;
The backlight module according to any one of claims 1 to 6,
A display module comprising: