CN217739676U

CN217739676U - Backlight module

Info

Publication number: CN217739676U
Application number: CN202221560427.3U
Authority: CN
Inventors: 刘阳; 黄清华; 黄欣; 刘波; 徐婉瑢; 徐帅
Original assignee: Shenzhen City Sanbum Photoelectric Co ltd
Current assignee: Shenzhen City Sanbum Photoelectric Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-04
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses a backlight module, include: the light source module is used for generating a target light signal; wherein the target optical signal comprises a first target optical signal and a second target optical signal; the frame is used for bearing the light source module; the light source module includes: a light source, a light mixing layer and a brightness enhancing layer; the light source is used for generating an initial light signal, and the initial light signal comprises a first initial light signal and a second initial light signal; the light mixing layer is arranged on the light emitting side of the light source and used for performing light mixing operation on the first initial optical signal to generate a mixed optical signal; the brightening layer is arranged on one side, away from the light source, of the light mixing layer and is used for brightening the mixed light signal to generate a first target light signal; the frame is also used for reflecting the second initial optical signal; the brightness enhancing layer is also operative to mix the second original light signal to generate a second target light signal. The utility model discloses a backlight unit can avoid appearing the phenomenon of light leak.

Description

Backlight module

Technical Field

The utility model relates to a backlight technical field especially relates to a backlight unit.

Background

At present, the backlight module is used as a light source of the liquid crystal display, and the light emitting effect directly affects the visual effect of the liquid crystal display.

In the related art, the backlight module mainly includes a light source, an optical film, and a plastic frame, wherein the optical film is used for adjusting an initial light signal generated by the light source to obtain a target light signal. However, since there are structural gaps between various elements, a part of the initial optical signal is directly output to the outside through the structural gaps, thereby causing the light leakage phenomenon of the backlight module.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a backlight module can avoid appearing the phenomenon of light leak.

The application provides a backlight module, include: a light source module to generate a target light signal; wherein the target optical signal comprises a first target optical signal and a second target optical signal; a frame for carrying the light source module; wherein the light source module includes: a light source, a light mixing layer and a brightness enhancing layer; the light source is used for generating an initial light signal, and the initial light signal comprises a first initial light signal and a second initial light signal; the light mixing layer is arranged on the light emitting side of the light source and is used for carrying out light mixing operation on the first initial optical signal so as to generate a mixed optical signal; the brightening layer is arranged on one side, away from the light source, of the light mixing layer and is used for brightening the mixed light signal to generate the first target light signal; wherein the frame is further configured to reflect the second initial optical signal; the brightness enhancing layer is also configured to mix the second original light signal to generate the second target light signal.

The embodiment performs a light mixing operation on the first initial light signal through the light mixing layer to generate a mixed light signal, and performs a brightness enhancement operation on the mixed light signal through the brightness enhancement layer to generate a first target light signal. In addition, the backlight module also reflects the second initial light signal to the brightening layer through the frame, and the brightening layer can perform light mixing and brightening operations on the second initial light signal to generate a second target light signal. Therefore, the backlight module of the embodiment can convert the second initial optical signal output to the structural gap into the second target optical signal for output, thereby avoiding the phenomenon of light leakage and improving the light emitting effect of the backlight module. In some embodiments, the brightness enhancing layer comprises: a colored sublayer to mix the second initial optical signal to generate the second target optical signal.

In some embodiments, the brightness enhancing layer further comprises: the prism array is arranged on one side, far away from the light mixing layer, of the colored sublayer and used for reflecting the mixed optical signal and the second initial optical signal.

In some embodiments, the brightness enhancing layer further comprises: the micro lens array is arranged on one side, close to the light mixing layer, of the colored sublayer and used for carrying out diffusion operation on the mixed optical signal and the second initial optical signal.

In some embodiments, the prism array is made of acrylic resin.

In some embodiments, the frame comprises: a first frame for carrying the light source; one end of the second frame is connected with the first frame, the second frame and the first frame form an included angle, and the second frame is used for reflecting the second initial optical signal; a third frame connected to the other end of the second frame, the third frame being configured to reflect the second initial optical signal.

In some embodiments, the second frame comprises: the first sub-frame is connected with the first frame through a bending part; a second sub-frame disposed on a side of the first sub-frame adjacent to the light source module.

In some embodiments, the first frame is made of iron.

In some embodiments, a color of a side of the second frame adjacent to the light source module is yellow.

In some embodiments, the light mixing layer includes any one of a quantum dot film or a fluorescent film.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;

FIG. 2 is a schematic view of a structure of a brightness enhancing layer according to an embodiment of the present invention;

fig. 3 is another schematic structural diagram of a backlight module according to an embodiment of the present invention.

Reference numerals: the backlight module 100, the light source module 110, the frame 120, the light source 111, the light mixing layer 112, the brightness enhancement layer 113, the colored sub-layer 114, the prism array 115, the micro-lens array 116, the first frame 121, the second frame 122, the third frame 123, the first sub-frame 124, and the second sub-frame 125.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, more than, etc. are understood as excluding the term, and the terms greater than, less than, etc. are understood as including the term. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It should be noted that the backlight module is used as a key component of the display panel, and has a function of providing a light source with sufficient brightness and uniform distribution, so that the display panel can normally display images. In the related art, an initial light signal generated by a light source is processed by an optical element, and a target light signal required by a display panel can be formed. However, as the backlight module has a certain structural gap between the optical elements, a part of the initial optical signal (the second initial optical signal) that is not processed by the optical elements is directly output to the outside through the structural gap, so that the backlight module has a light leakage phenomenon and the light emitting effect of the backlight module is reduced.

Therefore, the application provides a backlight module which can avoid light leakage phenomenon, thereby improving the light emitting effect of the backlight module.

Referring to fig. 1, the present application provides a backlight module 100, including: a light source module 110, the light source module 110 being configured to generate a target light signal; wherein the target optical signal comprises a first target optical signal and a second target optical signal; a frame 120, the frame 120 being used for carrying the light source module 110; wherein the light source module 110 includes: a light source, a light mixing layer and a brightness enhancing layer; the light source is used for generating an initial light signal, and the initial light signal comprises a first initial light signal and a second initial light signal; the light mixing layer is arranged on the light emitting side of the light source and is used for performing light mixing operation on the first initial optical signal to generate a mixed optical signal; the brightening layer is arranged on one side, away from the light source, of the light mixing layer and is used for brightening the mixed light signal to generate the first target light signal; wherein the frame 120 is further configured to reflect the second initial optical signal; the brightness enhancing layer is also configured to mix the second original light signal to generate the second target light signal.

It is understood that the backlight module 100 in the present embodiment includes a light source module 110 and a frame 120 for carrying the light source module 110. The light source module 110 includes a light source, a light mixing layer, and a brightness enhancing layer, which are sequentially stacked.

It will be appreciated that the light source is used to generate an initial light signal, which includes a first initial light signal and a second initial light signal. The first initial optical signal is output from the light-emitting side of the light source and transmitted to the light mixing layer, and the light mixing layer is used for performing light mixing operation on the initial optical signal to generate a mixed optical signal. In the present embodiment, the initial light signal emitted by the light source is a blue light signal, and the backlight module 100 in the related art needs to provide a white light signal to the outside, so the blue light signal (initial light signal) provided by the light source needs to be converted first. Specifically, a blue light signal generated by the light source is transmitted to the light mixing layer, and the light mixing layer receives the blue light signal and converts the spectrum of the blue light signal to form a white light signal (mixed light signal). In addition, the light source may also generate other initial light signals with different spectrums, and this embodiment is not limited herein.

It is understood that, in order to ensure good visual effect, the white light signal provided by the backlight assembly 100 to the display panel should have sufficient brightness. To this end, the backlight module 100 of the present embodiment is provided with a corresponding brightness enhancement layer for performing a brightness enhancement operation on the incident mixed light signal to form a corresponding first target light signal. The first target light signal is output from the brightness enhancing layer and impinges on the display area VA of the display panel to provide good backlighting for the display panel.

It can be understood that, as can be seen from the above description, when the initial optical signal generated by the light source module 110 is a blue optical signal, the initial optical signal needs to undergo a light mixing operation of the light mixing layer to form a corresponding white optical signal, however, due to the existence of the structural gap, a part of the initial optical signal, that is, the second initial optical signal, can be directly output from the light exit side of the light source to the structural gap and reflected to the outside through the structural gap, thereby causing a light leakage phenomenon. Therefore, in addition to performing brightness enhancement on the mixed light signal emitted from the light mixing layer, the brightness enhancement layer in this embodiment is also configured to perform light mixing and brightness enhancement on the second original light signal to generate a corresponding second target light signal.

Specifically, as shown by the light arrows in fig. 1, the second original light signal is output from the light-emitting side of the light source at an angle, and is transmitted to the surface of the frame 120 of the backlight module 100 through the structural gap, and the frame 120 reflects the second original light signal, so that the second original light signal enters the brightness enhancement layer. The brightness enhancing layer is capable of converting the spectrum of the second original light signal and performing a brightness enhancing operation on the second original light signal to form a second target light signal, which is output from the incremental layer and then illuminated on the display area VA of the display panel. Therefore, the brightness enhancement film can prevent the second initial optical signal from being directly output to the outside by performing light mixing and brightness enhancement operations on the second initial optical signal.

The embodiment performs a light mixing operation on the first initial light signal through the light mixing layer to generate a mixed light signal, and performs a brightness enhancement operation on the mixed light signal through the brightness enhancement layer to generate a first target light signal. In addition, the backlight module 100 further reflects the second original light signal to the brightness enhancing layer through the frame 120, and the brightness enhancing layer can perform light mixing and brightness enhancing operations on the second original light signal to generate a second target light signal. Therefore, the backlight module 100 of the present embodiment can convert the second initial optical signal output to the structural gap into the second target optical signal for output, thereby avoiding the light leakage and improving the light emitting effect of the backlight module 100.

Referring to FIGS. 1 and 2, in some embodiments, the brightness enhancing layer comprises: and the colored sublayer is used for carrying out light mixing operation on the second initial optical signal.

It will be appreciated from the above that the brightness enhancing layer serves to mix the second primary light signal. In particular, the brightness enhancing layer includes a colored sub-layer that is capable of converting the spectrum of the second primary light signal such that the spectrum of the second primary light signal coincides with the spectrum of the mixed light signal when the second primary light signal is illuminated onto the colored sub-layer. In this embodiment, the initial optical signal is a blue optical signal, and the target optical signal is a white optical signal, for example, the color of the colored sub-layer is set to yellow, and when the second initial optical signal passes through the colored sub-layer, the yellow colored sub-layer can convert the blue optical signal into the white optical signal, so as to generate the white optical signal and output the white optical signal to the display area VA. Similarly, the colored sub-layer may also be set to other colors according to different actual requirements, and this embodiment is not limited herein.

Referring again to FIGS. 1 and 2, in some embodiments, the brightness enhancing layer further comprises: the prism array is arranged on one side, far away from the light mixing layer, of the colored sublayer and used for reflecting the mixed optical signal and the second initial optical signal.

It is understood that, in order to ensure a good visual effect, the target light signal outputted to the display area VA should have a sufficient brightness to ensure the brightness of the backlight module 100. Therefore, the brightness enhancement layer of this embodiment is provided with a corresponding prism array, and when the mixed light signal or the second initial light signal is incident to the prism array, the prism array can utilize refraction and total reflection to concentrate the incident light therein at a certain angle, and then reflect the incident light from the brightness enhancement layer to the display area VA, so as to improve the brightness of the backlight module 100. Specifically, the prism array concentrates the dispersed light to be reflected within 70 degrees of the normal of the prism array, and the emergent light with the angle larger than 70 degrees can be reflected and utilized by the prism array again, so that the brightness of the center of the optical axis of the target optical signal is increased by 110%. Thus, the prismatic structure of the brightness enhancing layer of this embodiment is capable of performing the above-described reflection operation on the incident mixed light signal or the second primary light signal to obtain a target light signal having sufficient brightness.

Referring again to FIGS. 1 and 2, in some embodiments, the brightness enhancing layer further comprises: the micro lens array is arranged on one side, close to the light mixing layer, of the colored sublayer and used for carrying out diffusion operation on the mixed optical signal and the second initial optical signal.

It can be understood that, in order to ensure good visual effect, the target light signal output to the display area VA should be kept uniform to ensure the uniformity of the brightness of the backlight module 100. For this purpose, the brightness enhancing layer in this embodiment is provided with a corresponding microlens array, and the microlens array is disposed on the side of the colored sublayer close to the light mixing layer. When the mixed optical signal and the second initial optical signal of the outgoing of the light mixing layer are transmitted to the micro lens array, the micro lens array can scatter the light of the mixed optical signal or the second initial optical signal, so that the light can uniformly pass through the colored sub-layer to perform the light mixing operation, and the light can uniformly pass through the prism array to perform the sufficient reflection operation.

In some embodiments, the prism array is made of acrylic resin.

It can be understood that the prism array needs to reflect light multiple times, and for this reason, the material of the prism array in this embodiment is acrylic resin. The acrylic resin has excellent light resistance and ageing resistance, and in addition, the acrylic resin also has good light and color retention, water resistance and chemical resistance, so that the prism array can realize better optical effect. In addition, according to actual requirements, the prism array may also be made of other materials, and this embodiment is not limited herein.

Referring to fig. 3, in some embodiments, the frame 120 includes: a first frame 121, wherein the first frame 121 is used for carrying the light source; one end of the second frame 122 is connected to the first frame 121, the second frame 122 forms an included angle with the first frame 121, and the second frame 122 is configured to reflect the second initial optical signal; a third frame 123, wherein the third frame 123 is connected to the other end of the second frame 122, and the third frame 123 is configured to reflect the second initial optical signal.

It is understood that, as can be seen from the above, the light source module 110 includes a light source, a light mixing layer, and a brightness enhancing layer, which are sequentially stacked. In order to avoid the second initial optical signal from being emitted from the light source and then being emitted through the structural gap, the backlight module 100 of this embodiment is provided with the second frame 122, the second frame 122 is disposed along the stacking direction of the light source module 110, one end of the second frame 122 is connected to the first frame, and the second frame 122 is further configured to form an included angle with the first frame 121, so as to reflect the second initial optical signal, so that the second initial optical signal is incident into the brightness enhancement layer, thereby avoiding the light leakage phenomenon.

It can be understood that, in order to avoid the second initial light signal being directly emitted to the outside after being reflected by the second frame 122, the backlight module 100 of the embodiment further includes a third frame 123, where the third frame 123 is disposed at an end of the second frame 122 away from the first frame 121, and can reflect the second initial light signal reflected by the second frame 122 again, so as to reflect the second initial light signal to the brightness enhancement layer for light mixing and brightness enhancement, thereby avoiding light leakage. Meanwhile, the third frame 123 can block light, so that light is confined in the display area VA.

Referring again to fig. 3, in some embodiments, the second frame 122 includes: a first sub-frame 124, wherein the first sub-frame 124 is connected to the first frame 121 by a bending portion; a second sub-frame 125, wherein the second sub-frame 125 is disposed on a side of the first sub-frame 124 close to the light source module 110.

It is understood that, in order to better carry and fix the light source module 110, the second frame 122 in this embodiment includes a first sub-frame 124 and a second sub-frame 125, wherein the first sub-frame 124 is connected to the first frame 121 by a bending portion, and the second sub-frame 125 is disposed on a side of the first sub-frame 124 close to the light source module 110.

In some embodiments, the first frame 121 is made of iron.

It can be understood that, in order to protect and support the light source, the light mixing layer, the brightness enhancement layer, and the like in the backlight module 100, the first frame 121 in this embodiment is made of iron, and the iron first frame 121 can protect the backlight module 100 well, so as to prevent the light mixing layer and the brightness enhancement layer from being deformed by an external action, thereby ensuring a light emitting effect of the backlight module 100.

In some embodiments, the color of the side of the second frame 122 close to the light source module 110 is yellow.

It can be understood that, in the embodiment, the second frame 122 is formed by injection molding of a reflective material plastic, and the color of one side of the second frame, which is close to the light source module 110, is yellow, and when the second initial light signal is a blue light signal, the yellow reflective material of the second frame 122 can reflect the blue light signal and convert the blue light signal into a white light signal, so as to improve the light leakage phenomenon.

It is understood that the quantum dot film or the fluorescent film can convert an initial light signal into white light and can achieve high color gamut display of 80% to 100%. The quantum dot film is used as a brand new nano material with unique optical characteristics, blue light signals can be accurately and efficiently converted into red light signals and green light signals, the quantum dots can form a layer of film, full-spectrum light can be emitted by irradiation of the blue light signals, and color gamut expression can be greatly improved by finely adjusting initial light signals emitted by a light source. Compared with the backlight module 100 in the related art, the color gamut of the backlight module 100 of the embodiment is improved by about 25% to 50%, and the transmittance of the liquid crystal glass LCD (display panel) can be synchronously improved, so as to improve the brightness value.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. Backlight unit, its characterized in that includes:

a light source module for generating a target light signal; wherein the target optical signal comprises a first target optical signal and a second target optical signal;

a frame for carrying the light source module;

wherein the light source module includes: a light source, a light mixing layer and a brightness enhancing layer; the light source is used for generating an initial light signal, and the initial light signal comprises a first initial light signal and a second initial light signal; the light mixing layer is arranged on the light emitting side of the light source and is used for carrying out light mixing operation on the first initial optical signal so as to generate a mixed optical signal; the brightening layer is arranged on one side, away from the light source, of the light mixing layer and is used for brightening the mixed light signal to generate the first target light signal;

wherein the frame is further configured to reflect the second initial optical signal; the brightness enhancing layer is also configured to mix the second original light signal to generate the second target light signal.

2. A backlight module according to claim 1, wherein the brightness enhancing layer comprises:

a colored sublayer to mix the second initial optical signal to generate the second target optical signal.

3. The backlight module of claim 2, wherein the brightness enhancing layer further comprises:

and the prism array is arranged on one side of the colored sublayer, which is far away from the light mixing layer, and is used for carrying out reflection operation on the mixed optical signal and the second initial optical signal.

4. A backlight module according to claim 3, wherein the brightness enhancing layer further comprises:

the micro lens array is arranged on one side, close to the light mixing layer, of the colored sublayer and used for carrying out diffusion operation on the mixed optical signal and the second initial optical signal.

5. The backlight module as claimed in claim 4, wherein the prism array is made of acrylic resin.

6. A backlight module according to claim 1, wherein the frame comprises:

a first frame for carrying the light source;

one end of the second frame is connected with the first frame, the second frame and the first frame form an included angle, and the second frame is used for reflecting the second initial optical signal;

a third frame connected to the other end of the second frame, the third frame being configured to reflect the second initial optical signal.

7. The backlight module according to claim 6, wherein the second frame comprises:

the first sub-frame is connected with the first frame through a bending part;

a second sub-frame disposed on a side of the first sub-frame adjacent to the light source module.

8. The backlight module as claimed in claim 6, wherein the first frame is made of iron.

9. The backlight module as claimed in claim 6, wherein the second frame has a yellow color on a side thereof adjacent to the light source module.

10. The backlight module according to any one of claims 1 to 9, wherein the light mixing layer comprises any one of a quantum dot film or a fluorescent film.