TWM569861U - Backlight module and display device - Google Patents

Abstract

A backlight module and a display device, the display device comprises a backlight module and a display panel disposed in front of the backlight module, the backlight module comprises a back plate, a reflective sheet, a light guide plate, a light-emitting component and an optical film, wherein the reflective sheet is combined with the back The glue is fixed on the back plate in a fully-fitted manner, so that the reflection sheet and the back plate are integrally consolidated, so that the reflection sheet can be supported by the back plate, and the reflection sheet can be reduced in temperature and humidity factors of the external environment. In addition, the reflective sheet also utilizes a structure in which a plurality of venting apertures are dispersedly disposed, thereby providing a function of exhausting in a process in which the reflecting sheet is fully attached to the backing plate, and increasing the total fit of the reflective sheet and the backing sheet. Adhesion and flatness.

Description

Backlight module and display device

The present invention relates to a backlight module for providing a backlight, and a display device including the same and a display function.

In a conventional flat panel display device such as a liquid crystal display, the backlight module has a large structure space, so that a reflective sheet having a large thickness can be used, and the thick reflective sheet itself has considerable rigidity and structural strength, and is not easily externally. The illuminating deformation occurs due to factors such as the temperature and humidity of the environment. Therefore, the backlight module of the conventional liquid crystal display device has a combined structure of a partial structure pressing reflection sheet or a partial bonding fixed reflection sheet in an assembly structure.

Planar displays such as liquid crystal display devices known today are facing a trend toward thinning. Taking a liquid crystal television as an example, a general-purpose mass-produced liquid crystal display device having a thickness of 9.9 mm has been developed to a liquid crystal display device having a thickness of 4.9 mm, and is now oriented toward an ultra-thin liquid crystal display device having a thickness of 3.9 mm. Product direction development. With the trend toward thinner liquid crystal display devices, the overall mechanism is dedicated to the development of thinning, and the thickness of each component must be relatively reduced without affecting its original performance. For example, in the past, the backlight module used a reflective sheet with a thickness of 0.33 mm. In today's backlight module, a reflective sheet such as a thickness of 0.15 mm must be considered.

However, in the diaphragm type component of the backlight module, the reflective sheet is reduced in thickness, and the structural strength and the stiffness are relatively weak, so that the reflective sheet is susceptible to the influence of temperature, humidity and the like of the external environment to generate a wave shape. Deformation. However, in the research and development of the known backlight module, no specific solution has been proposed for the deformation of the thin reflective sheet.

The object of the present invention is to provide a backlight module and a display device including the same, which solves the problem that the existing reflective sheet lacks stiffness due to thinning and is affected by external environmental factors such as temperature and humidity, thereby affecting its optical performance.

In order to achieve the foregoing, the backlight module of the present invention comprises: a back sheet; a reflective sheet, the back side of which is bonded to the front surface of the back sheet by a backing adhesive, and the reflective sheet is distributed. a plurality of venting apertures are disposed; a light guide plate is disposed in front of the reflective sheet, the light guide plate includes a light emitting surface, a reflecting surface and a light incident side, wherein the light emitting surface and the reflecting surface are respectively located on the light guiding plate The front side and the rear side are located on one side of the light guide plate, the reflective surface of the light guide plate faces the reflective sheet, and the reflective surface has a plurality of microstructures; and a light emitting component is disposed on the light guide plate The light-emitting component can project light toward the light-incident side; and at least one optical film is disposed in front of the light-emitting surface of the light guide plate.

In the backlight module as described above, a plurality of the venting aperture forming matrices are arranged in a matrix in the reflective sheet.

In the backlight module as described above, the gas permeable pores form a meandering slit, an arcuate slit or a cross slit.

In the backlight module as described above, the gas permeable pores form perforations.

In the backlight module as described above, the perforation aperture of the venting aperture is smaller than the microstructure of the reflective surface of the light guide plate.

In the backlight module as described above, the backlight module further includes an outer frame, the peripheral edge of the back plate is fixed to the rear side of the outer frame, the reflective sheet, the light guide plate, the light emitting assembly, and the optical film The sheet is located in the outer frame, and the reflective sheet contacts the reflective surface of the light guide plate.

In the backlight module as described above, the front side of the outer frame has a bearing surface, and the optical film at the front position is flush with the bearing surface, and the outer frame forms an assembly recess facing the inner periphery of the back plate. A peripheral edge of the light guide plate protrudes from the edge of the optical film and protrudes into the fitting recess of the outer frame.

In order to achieve the foregoing, the display device additionally proposed by the present invention comprises: a backlight module as described above; and a display panel disposed on the front side of the backlight module.

In order to achieve the foregoing, the display device of the present invention further includes: a backlight module as described above; and a display panel disposed on the front side of the backlight module and fixed to the bearing surface of the outer frame.

In the display device as described above, the display panel is adhesively fixed to the bearing surface of the outer frame in combination with at least one double-sided tape.

In the new creation of the backlight module and the display device, the thinned reflective sheet is fully bonded to the back plate, and the thinned reflective sheet is supported by the back plate having strong structural strength, and the reflective sheet is used at the same time. By attaching the adhesive to the backing plate in a fully-fitted manner, the thinned reflective sheet is deformed by the temperature and humidity factors of the external environment. On the other hand, the present invention also utilizes a structure in which a plurality of venting apertures are dispersedly disposed by the reflecting sheet, thereby providing a function of exhausting in a process in which the reflecting sheet is fully attached to the backing plate, and increasing the total fitting of the reflecting sheet and the backing plate. Adhesion and flatness prevent local bubbles from being generated when the reflective sheet is completely attached to the back sheet, ensuring the light reflection performance of the reflective sheet.

As shown in FIG. 1 and FIG. 8 , two embodiments of the backlight module 1 of the present invention are disclosed. As can be seen from the drawings, the backlight module 1 includes a backplane 10 . A reflective sheet 20, a light guide plate 30, a light emitting assembly 40, and at least one optical film 50.

As shown in FIG. 1 and FIG. 2, the back plate 10 is made of a rigid material such as a metal material, and has a predetermined mechanical strength and supporting force.

As shown in FIG. 2 and FIG. 3, the reflective sheet 20 is fixed to the front surface of the backboard 10 by a backing adhesive 22 in a fully-fitted manner. The reflective sheet 20 is provided with a plurality of venting apertures 21. . In this embodiment, the adhesive 22 can be a double-sided film or a colloid.

As shown in FIG. 2 and FIG. 3, the reflective sheet 20 is fixed to the front surface of the backing plate 10 in a fully-fitted manner, and the reflective sheet 20 can be fully and evenly smoothed by the roller set rolling means. The venting function is provided on the backing plate 10, and a plurality of the venting apertures 21 are used to fully affix the reflective sheet 20 to the backing plate 10 to prevent the air bubbles from being locally generated between the reflective sheet 20 and the backing plate 10. .

As shown in FIG. 1 and FIG. 2 , the light guide plate 30 is disposed in front of the reflective sheet 20 , and the light guide plate 30 includes a light emitting surface 31 , a reflective surface 32 , and a light incident surface 33 . The reflective surface 32 is located on the front and rear sides of the light guide plate 30. The light incident side surface 33 is located at one side of the light guide plate 30. The reflective surface 32 of the light guide plate 30 faces the reflective sheet 20, and the reflective surface 32 A plurality of microstructures may also be formed to enhance the uniformity of light traveling inside the light guide plate 30 by using a plurality of microstructures disposed on the reflective surface 32.

In addition, the light-emitting surface 31 of the light guide plate 30 can also form a plurality of light-emitting microstructures, thereby adjusting the optical trend of the light guide plate 30 through the plurality of light-emitting microstructures disposed on the light-emitting surface 31, and improving the light passing through the light guide plate 30. The uniformity of light output. The shape, size, and distribution of the plurality of the microstructures and the plurality of light-emitting microstructures are set on the reflective surface and the light-emitting surface, and may be changed according to the optical characteristics of different products.

As shown in FIG. 1 and FIG. 2 , the light-emitting component 40 is disposed outside the light-incident side surface 33 of the light guide plate 30 , and the light-emitting component 40 can project light toward the light-incident side surface 33 . The light-emitting assembly 40 can be selected from a light strip having a plurality of light-emitting diode elements (LEDs).

As shown in FIG. 1 and FIG. 2 , the optical film 50 is disposed in front of the light-emitting surface 31 of the light guide plate 30 . When the backlight module 1 uses a combination of the plurality of optical films 50 , the plurality of optical films 50 are The optical film 50 is used to provide optical properties such as brightness enhancement or light diffusion dispersion, thereby improving the overall brightness and light uniformity of the surface light source emitted from the light exit surface 31 of the light guide plate 30.

The plurality of the venting pores of the reflecting sheet can be subjected to various changes in shape, distribution manner, and the like without affecting the optical properties thereof. As shown in FIGS. 4 to 7, a plurality of the gas permeable apertures 21A to 21D are arranged in a matrix arrangement and disposed in the reflection sheets 20A to 21D. The plurality of the venting apertures 21A-21D may also be disposed in other distributed manners according to the process requirements of the reflective sheets 20A-20D being fully attached to the backing plate 10.

Furthermore, the shape of the permeable pores of the reflective sheet can also be varied in a number of different types. As shown in the embodiment of FIG. 4, the gas permeable aperture 21A of the reflective sheet 20A forms a meandering slit; as shown in the embodiment of FIG. 5, the gas permeable aperture 21B of the reflective sheet 20B forms an arcuate slit. As shown in the embodiment of Fig. 6, the gas permeable apertures 21C of the reflective sheet 20C form a cross-shaped slit. The front venting apertures 21A, 21B, 21C provide venting performance by the various narrow and narrow slit shapes described above.

In addition, as shown in FIG. 7 and FIG. 2, the venting apertures 21D of the reflective sheets 20 and 20D may also form perforations, and the perforated aperture of the venting apertures 21D is smaller than the microstructure of the reflective surface 32 of the light guide plate 30 to avoid ventilation. The pore diameter of the pore 21D is too large to affect its light reflection performance.

In the embodiment shown in FIG. 8 and FIG. 9 , the backlight module 1 further includes an outer frame 60 . The periphery of the back plate 10 is fixed to the rear side of the outer frame 60 , so that the outer frame 60 and the back plate 10 are An accommodating space is formed in the combination. The reflective sheet 20, the light guide plate 30, the light-emitting assembly 40, and the optical film 50 are located in a accommodating space of the combination of the outer frame 60 and the back plate 10. 20 contacts the reflective surface 32 of the light guide plate 30.

In the embodiment shown in FIG. 8 and FIG. 9 , the outer frame 60 can be a molded part of plastic material and surrounds the outer periphery of the back plate 10 . The front side of the outer frame 60 can also form a bearing surface 62. The optical film 50 at the front position is flush with the bearing surface 62. The outer frame 60 faces the inner periphery of the back plate 10 to form a fitting recess 61. The periphery of the light guide plate 30 protrudes from the edge of the optical film 50 and protrudes into the fitting recess 61 of the outer frame 60.

As shown in FIG. 10 , the backlight module 1 can be further applied to a display device. The display device includes a backlight module 1 and a display panel 2 , and the backlight module 1 has a front structure and a front backlight. The embodiments of the module 1 are the same and will not be described again. The display panel 2 can be a liquid crystal display panel, and the display panel 2 is mounted in front of the optical film 50 of the backlight module 1 . As shown in FIG. 10 , when the backlight module 1 has the outer frame 60 , the front side of the outer frame 60 has a bearing surface 62 , and the display panel 2 is adhered to the outer frame 60 by combining at least one double-sided tape 70 . On the bearing surface 62. Thereby, the backlight module 1 is used to provide a necessary backlight when displaying the screen on the display panel 2.

As can be seen from the above description, the backlight module and the display device of the present invention are fully bonded to the back plate by using a thin reflective sheet, and the back plate having strong structural strength provides sufficient supporting force to the thin reflective sheet. The reflective sheet is integrally bonded to the backing plate in combination with the adhesive, so that the reflective sheet and the back sheet are firmly combined and integrated, so that the thinned reflective sheet can be effectively deformed by the temperature and humidity factors of the external environment. The situation.

Furthermore, under the condition that the optical appearance of the backlight module and the display device is not affected, the structure in which a plurality of venting apertures are dispersed and disposed by the reflection sheet is used, and the reflection sheet is completely adhered to the process of the back sheet, so that the reflection sheet can remain in the reflection sheet. The air between the backing plate and the backing plate is exhausted through a plurality of venting pores to achieve the effect that the reflecting sheet is fully and smoothly attached to the backing plate, thereby increasing the adhesion and flatness between the reflecting sheet and the backing plate, and avoiding the reflecting sheet. Local bubbles are generated during the process of fully bonding to the backsheet to ensure the reflective properties of the reflective sheet.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention. The skilled person can make some modifications or modifications to the equivalent embodiments by using the above-disclosed technical contents without departing from the spirit and scope of the present invention. The technical content of the present invention is not limited to any simple modifications, equivalent changes and modifications of the preferred embodiments described above.

1‧‧‧Backlight module
2‧‧‧ display panel
10‧‧‧ Backboard
20, 20A, 20B, 20C, 20D‧‧‧ reflection film
21, 21A, 21B, 21C, 21D‧‧‧ venting pores
22‧‧‧ Back adhesive
30‧‧‧Light guide
31‧‧‧Glossy
32‧‧‧reflecting surface
33‧‧‧light side
40‧‧‧Lighting components
50‧‧‧Optical diaphragm
60‧‧‧ frame
61‧‧‧ fitting recess
62‧‧‧ bearing surface
70‧‧‧Double-sided tape

1 is a side plan view showing an embodiment of the backlight module of the present invention. 2 is a partial enlarged view of the embodiment of the backlight module shown in FIG. 1. FIG. 3 is an exploded perspective view of the reflective sheet, the backing, and the back sheet in the embodiment of the backlight module shown in FIG. 1 and FIG. 4 to FIG. 7 are schematic plan views showing a plurality of different shape embodiments of the gas permeable aperture of the reflective sheet of the backlight module of the present invention. FIG. 8 is a side cross-sectional view showing another embodiment of the backlight module of FIG. FIG. 9 is a partial enlarged view of another embodiment of the backlight module shown in FIG. 8. Figure 10 is a side cross-sectional view showing an embodiment of the novel display device.

Claims (10)

A backlight module includes: a back sheet; a reflective sheet, the back surface of which is fixed to the front surface of the back sheet by a backing adhesive, and the reflective sheet is distributed with a plurality of venting apertures; The light guide plate is disposed in front of the reflective sheet. The light guide plate includes a light emitting surface, a reflecting surface and a light incident side. The light emitting surface and the reflecting surface are respectively located on the front and rear sides of the light guiding plate. The side surface is located at one side of the light guide plate, the reflective surface of the light guide plate faces the reflective sheet, and the reflective surface has a plurality of microstructures; a light emitting component is disposed outside the light incident side of the light guide plate, the light emitting component Light can be projected toward the light incident side; and at least one optical film is disposed in front of the light emitting surface of the light guide plate. The backlight module of claim 1, wherein a plurality of the venting aperture forming matrices are arranged in a row in the reflective sheet. The backlight module of claim 1, wherein the gas permeable pores form a meandering slit, an arcuate slit or a cross-shaped slit. The backlight module of claim 1, wherein the gas permeable aperture forms a perforation. The backlight module of claim 4, wherein the perforated aperture of the venting aperture is smaller than the microstructure of the reflective surface of the light guide. The backlight module of any one of claims 1 to 5, wherein the backlight module further comprises an outer frame, the peripheral edge of the back plate is fixed to the rear side of the outer frame, the reflective sheet, the guide The light panel, the light emitting component, and the optical film are located in the outer frame, and the reflective sheet contacts the reflective surface of the light guide plate. The backlight module of claim 6, wherein the front side of the outer frame has a bearing surface, and the optical film at the front position is flush with the bearing surface, and the outer frame faces the inner circumference of the back plate. An assembly recess having a peripheral edge projecting from the edge of the optical film and extending into the fitting recess of the outer frame. A display device comprising: a backlight module as claimed in claim 6; and a display panel disposed on a front side of the backlight module. A display device comprising: a backlight module according to claim 7; and a display panel disposed on a front side of the backlight module and fixed to a bearing surface of the outer frame. The display device of claim 9, wherein the display panel is adhesively fixed to the bearing surface of the outer frame in combination with at least one double-sided tape.