WO2016131209A1

WO2016131209A1 - Backlight module

Info

Publication number: WO2016131209A1
Application number: PCT/CN2015/075698
Authority: WO
Inventors: 萧宇均; 阙成文
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2015-02-17
Filing date: 2015-04-01
Publication date: 2016-08-25
Also published as: CN104613384A; CN104613384B

Abstract

A backlight module, applied to a wide-gamut curved display. Aiming at the problem of insufficient backlight brightness of quantum dot technology, compensation light sources (22) are additionally arranged in a backlight module, the compensation light sources (22) are arranged on at least one side of two sides of two corresponding long edges (32) of a light guide plate (3), at least one compensation light source (22) is located on one side of each long edge (32), and the compensation light sources (22) are white light LED lamp bars or other monochromatic LED light bars compensated according to a gamut demand. By arranging the compensation light sources (22), the backlight module compensates a certain luminous flux, so as to improve the brightness or gamut performance of a display, thereby being beneficial to the large size design of a wide gamut curved display, and also being beneficial to the reduction of the costs of an optical film set.

Description

Backlight module

Technical field

The present invention relates to the field of display technologies, and in particular, to a backlight module for a wide color gamut curved display.

Background technique

Currently, display devices are primarily flat panel displays. The liquid crystal module used in the flat panel display mostly uses TFT-LCD (Thin Film Field Effect Transistor LCD) technology. The TFT-LCD is a non-active light-emitting display. It is usually provided with a uniform system brightness by a white light backlight module (Backlight Module), and then a rich color display through a color filter.

Because the retina of the human eye is curved, viewing a purely flat display is actually "distorted", while the curved screen can visually map the image to the brain at the same angle, thus skipping the "flat" that the flat screen brings to the viewer. - Surface-plane" conversion, users can really feel the cinema-level audio-visual experience brought by the curved screen display technology, the curved screen can achieve a better viewing angle on the left and right sides, and more natural, more comfortable, to the brain The pressure is even smaller and the sense of presence is more outstanding. Therefore, in order to improve the user experience, it is necessary to provide a curved display. In the curved display, the wide color gamut curved display has better color performance.

However, it is not simple to make a wide color gamut surface display. One of the existing side-in-light wide color gamut surface display technologies is to provide a quantum tube in the curved backlight module because the quantum tube itself is a straight glass tube. Therefore, the curved display using quantum dot technology generally adopts the design of short-side light input, so that the number of LEDs that can be placed is greatly limited, resulting in a low overall luminous flux of the curved backlight module; meanwhile, due to the quantum tube The driving light is generally a relatively high-energy blue light, which is inherently weaker in white light than the white light, and the light is slightly attenuated as it passes through the quantum tube and the light guide plate is bent to cause loss of light, so that the light is lost. Curved displays using quantum dot technology have lower brightness performance. When the display size is too large, the phenomenon of low brightness is more obvious. Because the total luminous flux is low, even if the engineer uses a very expensive optical film set to improve the brightness performance, it has a limited effect, which directly leads to insufficient competitiveness of the optical specifications of the product.

Since it is very difficult to improve the light efficiency of a single LED in a short period of time, the development of the current side-lit large-size wide color gamut curved display has been greatly limited.

Summary of the invention

It is an object of the present invention to provide a backlight module for a wide color gamut curved display, The problem of insufficient brightness of the quantum dot technology backlight increases the compensation light source to increase the optical brightness of the curved display or enhance its color gamut performance.

To achieve the above objective, the present invention provides a backlight module for a wide color gamut curved display, including a heat dissipation bracket, a main light source, a compensation light source, a light guide plate, and a mounting seat, wherein the heat dissipation bracket includes a first bottom plate and a connection portion. a plurality of first side plates of a bottom plate, the light guide plate having opposite short sides and opposite long sides between the two short sides and connected to the two short sides, the first side plate corresponding to the short side The two long sides are respectively disposed corresponding to the two curved sides of the wide color gamut curved display, the light guide plate is located on the first bottom plate, and the main light source is mounted on the first side plate corresponding to the short side of the light guide plate, The compensation light source is mounted on the mounting seat corresponding to the long side of the light guide plate, and the mounting seat is located on the first bottom plate.

The two main light sources are two, and the first side plates are two, which are respectively disposed corresponding to the two short sides of the light guide plate, and the light guide plate is provided with a compensation light source on at least one side of the two long sides. One or two compensation light sources on one side of the long side are disposed on at least one side of the two sides of the light guide plate corresponding to the compensation light source.

The first side plate is integrally extended from the first bottom plate or mounted on the first bottom plate, and the mounting seat is integrally extended from the first bottom plate or mounted on the first bottom plate.

The main light source is a blue LED light bar, and a quantum tube is disposed between the main light source and the short side of the light guide plate.

The backlight module further includes a quantum tube clamping device that clamps and fixes the quantum tube, the quantum tube clamping device includes a second bottom plate and a second side plate connecting the second bottom plate, the second side The plate is provided with a groove portion, and the quantum tube is mounted in the groove portion by being engaged.

The quantum tube has an elliptical cross section, and the groove portion is an arcuate groove.

The second bottom plate of the quantum tube clamping device is provided with a through hole, and the first bottom plate of the heat dissipation bracket is provided with a threaded hole, and is locked into the threaded hole through a through hole, and the quantum tube clamping device is The second bottom plate is locked and fixed with the first bottom plate of the heat dissipation bracket, thereby fixing the quantum tube clamping device to the heat dissipation bracket.

The compensation light source is an LED light bar.

The LED strip is a white LED strip or other monochromatic LED strip that is compensated for depending on the color gamut.

A reflective sheet is further disposed between the light guide plate and the first bottom plate of the heat dissipation bracket.

The invention also provides a backlight module for a wide color gamut curved display, comprising a heat dissipation bracket, a main light source, a compensation light source, a light guide plate, and a mounting seat, wherein the heat dissipation bracket comprises a first bottom plate and a number connected to the first bottom plate a first side plate, the light guide plate has two opposite short sides and two opposite long sides connected between the two short sides and connected to the two short sides, the first side plate is disposed corresponding to the short side, The two long sides are respectively disposed corresponding to the two curved sides of the wide color gamut curved display, the light guide plate is located on the first bottom plate, and the main light source is mounted on the first side plate corresponding to the short side of the light guide plate, and the compensation light source corresponds to The long side of the light guide plate is mounted on the mounting seat, and the mounting seat is located on the first bottom plate;

The two main light sources are two, and the first side plates are two, which are respectively disposed corresponding to the two short sides of the light guide plate, and the light guide plate is provided with a compensation light source on at least one side of the two long sides. The compensation light source located on one side of each long side is one or two, and the mounting base corresponding to the compensation light source is disposed on at least one of two sides of the corresponding two long sides of the light guide plate;

The first side plate is integrally extended from the first bottom plate or mounted on the first bottom plate, and the mounting seat is integrally extended from the first bottom plate or mounted on the first bottom plate;

Wherein, a reflective sheet is further disposed between the light guide plate and the first bottom plate of the heat dissipation bracket.

The present invention provides a backlight module for a wide color gamut curved surface display, wherein the backlight module adds a compensation light source to the backlight module for the problem of insufficient brightness of the quantum dot technology backlight. The compensation light source is disposed on at least one of two sides of the two long sides of the light guide plate, and the number of compensation light sources on one side of each long side is not less than one, and the compensation light source is a white light LED light bar or Other monochromatic LED strips required to compensate for the gamut, the present invention supplements the backlight module with a certain amount of luminous flux by setting a compensating light source to improve the brightness or color gamut of the display, and is advantageous for the large-scale display of the wide-gamut curved display. The design also helps to reduce the cost of the optical film set.

The detailed description of the present invention and the accompanying drawings are to be understood,

DRAWINGS

The technical solutions and other advantageous effects of the present invention will be apparent from the following detailed description of embodiments of the invention.

In the drawings,

1 is a light-receiving relationship diagram of a first embodiment of a backlight module of the present invention;

2 is a partial structural schematic view of a backlight module of the present invention;

3 is a top plan view of a first embodiment of a backlight module of the present invention;

4 is a light-receiving relationship diagram of a second embodiment of a backlight module of the present invention.

detailed description

In order to further clarify the technical means and effects of the present invention, the following detailed description will be made in conjunction with the preferred embodiments of the invention and the accompanying drawings.

The present invention provides a backlight module for a wide color gamut curved surface display. Referring to FIG. 1-3, a first embodiment of the backlight module of the present invention is provided. In this embodiment, the backlight module includes a heat dissipation bracket. 1. The main light source 21, the compensation light source 22, the light guide plate 3, and the mounting base 7. The heat dissipation bracket 1 includes a first bottom plate 11 and a plurality of first side plates 12 connected to the first bottom plate 11, the light guide plate 3 having The opposite two short sides 31 are opposite to the two long sides 32 which are located between the two short sides 31 and are connected to the two short sides 31. The first side plate 12 is disposed corresponding to the short side 31, and the two long sides 32 respectively correspond to The two sides of the wide color gamut curved surface display are disposed, the light guide plate 3 is located on the first bottom plate 11, and the main light source 21 is mounted on the first side plate 12 corresponding to the short side 31 of the light guide plate 3, the compensation light source 22 corresponds to the long side 32 of the light guide plate 3 mounted on the mounting base 7, and the mounting seat 7 is located on the first bottom plate 11.

Specifically, the two main light sources 21 are two, and the first side plates 12 are two, which are respectively disposed corresponding to the two short sides 31 of the light guide plate 3, and the light guide plate 3 is disposed on two sides of the two long sides 32. The compensation light source 22 has two compensation light sources 22 on each side of the long side 32. The mounting base 7 is disposed on the two sides of the corresponding long sides 32 of the light guide plate 3 corresponding to the compensation light source 22. Further, the compensation light source 22 located on one side of each long side 32 may also be one or more than two.

Specifically, the first side plate 12 is integrally extended from the first bottom plate 11 or mounted on the first bottom plate 11 , and the mounting seat 7 is integrally extended from the first bottom plate 11 or mounted on the first bottom plate 11 . In this embodiment, the first side plate 12 is mounted on the first bottom plate 11 , and the mounting seat 7 is mounted on the first bottom plate 11 .

Specifically, the main light source 21 is a blue LED light bar, and a quantum tube 4 is further disposed between the main light source 21 and the short side 31 of the light guide plate 3. The quantum tube 4 is sandwiched by the quantum tube clamping device 5 Fixed. When the blue LED strip emits light, its blue light passes through the quantum tube 4. Since the blue light energy is high, the fluorescent material in the quantum tube 4 can be excited to generate relatively low-energy green light and red light, and the excited light and part are excited. The blue light directly passing through the quantum tube 4 is mixed to display the desired white light, and then enters the light guide plate 3 of the backlight module to meet the light source required for display display.

Specifically, the quantum tube clamping device 5 includes a second bottom plate 51 and a second side plate 52 connected to the second bottom plate 51. The second side plate 52 is provided with a groove portion 523, and the quantum tube 4 passes the card. The combination is mounted in the groove portion 523. In this embodiment, the quantum tube 4 has an elliptical cross section, and the groove portion 523 is an arcuate groove.

Specifically, the second bottom plate 51 of the quantum tube clamping device 5 is provided with a through hole 513. The first bottom plate 11 of the heat dissipation bracket 1 is provided with a threaded hole 113, and is screwed into the thread through the through hole 513 through the screw 6. In the hole 113, the second bottom plate 51 of the quantum tube holding device 5 is locked and fixed to the first bottom plate 11 of the heat dissipation bracket 1, thereby fixing the quantum tube holding device 5 to the heat dissipation bracket 1.

Specifically, the compensation light source 22 includes a plurality of LEDs arranged in sequence along the long side 32 of the light guide plate 3. The light bar is a white LED strip or other monochromatic LED strips that are compensated according to the color gamut. The compensating light source 22 can supplement the backlight module with a certain luminous flux to compensate the backlight module optical brightness. Insufficient, so that the optical film set of the curved display can be used at a relatively low price, which reduces the product cost while satisfying its optical brightness specification.

The number of LED strips and the efficacy of the compensation light source 22 can be adjusted according to the size of the display and the optical brightness specifications to achieve a large-scale quantum dot curved display design.

Specifically, a reflective sheet 7 is further disposed between the light guide plate 3 and the first bottom plate 11 of the heat dissipation bracket 1 .

As shown in FIG. 4 , the second embodiment of the backlight module of the present invention is different from the first embodiment in that the light guide plate 3 is provided with a compensation light source 22 only corresponding to a side of a long side 32 . There are two compensation light sources 22 on the side of the long side 32. The mounting base 7 is disposed on the side of the light guide plate 3 corresponding to the long side 32 corresponding to the compensation light source 22. Further, the compensation light source 22 on the side of the long side 32 may also be one or more than two. Specifically, the compensation light source 22 is an LED light bar, and the LED light bar is a white LED light bar or other monochromatic LED light bar that needs compensation according to a color gamut, and the compensation light source 22 can supplement the backlight module. A certain luminous flux to compensate for the lack of optical brightness of the backlight module, so that the optical film set of the curved display can be used at a relatively low price, and the optical brightness specification is reduced while reducing the product cost.

In summary, the present invention provides a backlight module for a wide color gamut curved surface display, wherein the backlight module adds a compensation light source to the backlight module for the problem of insufficient brightness of the quantum dot technology backlight, and the compensation The light source is disposed on at least one of two sides of the two long sides of the light guide plate, and the number of compensation light sources on one side of each long side is not less than one, and the compensation light source is a white LED light bar or according to a color gamut. Other monochromatic LED strips required for compensation, the invention supplements the backlight module with a certain luminous flux by setting a compensation light source to improve the brightness or color gamut of the display, and is advantageous for the large-scale design of the wide color gamut curved display. It also helps to reduce the cost of the optical film set. At the same time, the design method is equally applicable to the design of flat panel displays.

In the above, various other changes and modifications can be made in accordance with the technical solutions and technical concept of the present invention, and all such changes and modifications are within the scope of the claims of the present invention. .

Claims

A backlight module for a wide color gamut curved display, comprising a heat dissipation bracket, a main light source, a compensation light source, a light guide plate, and a mounting seat, the heat dissipation bracket comprising a first bottom plate and a plurality of first sides connected to the first bottom plate a light guide plate having two opposite short sides and two opposite long sides connected between the two short sides and connected to the two short sides, wherein the first side plate is disposed corresponding to the short side, and the two long sides respectively correspond to The two color edges of the wide color gamut curved surface display are arranged, the light guide plate is located on the first bottom plate, the main light source is mounted on the first side plate corresponding to the short side of the light guide plate, and the compensation light source is installed corresponding to the long side of the light guide plate On the mount, the mount is located on the first bottom plate.
The backlight module of claim 1 , wherein the two main light sources are two, and the first side plates are two, respectively corresponding to two short sides of the light guide plate, and the light guide plate corresponds to two long sides. At least one side of the two sides is provided with a compensation light source, and one or two compensation light sources are located on one side of each long side, and the mounting base corresponding to the compensation light source is disposed on at least one side of the two sides of the light guide plate corresponding to the two long sides .
The backlight module of claim 2, wherein the first side plate is integrally extended from the first bottom plate or mounted on the first bottom plate, and the mounting seat is integrally extended from the first bottom plate or mounted on the first On the bottom plate.
The backlight module of claim 1 , wherein the main light source is a blue LED light bar, and a quantum tube is disposed between the main light source and a short side of the light guide plate.
The backlight module of claim 4, further comprising a quantum tube clamping device that clamps and fixes the quantum tube, the quantum tube clamping device comprising a second bottom plate and a second side plate connecting the second bottom plate The second side plate is provided with a groove portion, and the quantum tube is mounted in the groove portion by a snap fit.
The backlight module of claim 5, wherein the quantum tube has an elliptical cross section, and the groove portion is an arcuate groove.
The backlight module of claim 5, wherein the second bottom plate of the quantum tube holding device is provided with a through hole, and the first bottom plate of the heat dissipation bracket is provided with a threaded hole, and is inserted through the through hole through a screw In the threaded hole, the second bottom plate of the quantum tube holding device is locked and fixed with the first bottom plate of the heat dissipation bracket, thereby fixing the quantum tube clamping device to the heat dissipation bracket.
The backlight module of claim 1, wherein the compensation light source is an LED light bar.
The backlight module of claim 8, wherein the LED light bar is a white LED light bar or other monochromatic LED light bar that is compensated according to a color gamut.
The backlight module of claim 1 , wherein a reflective sheet is further disposed between the light guide plate and the first bottom plate of the heat dissipation bracket.
A backlight module for a wide color gamut curved display, comprising a heat dissipation bracket, a main light source, a compensation light source, a light guide plate, and a mounting seat, the heat dissipation bracket comprising a first bottom plate and a plurality of first sides connected to the first bottom plate a light guide plate having two opposite short sides and two opposite long sides connected between the two short sides and connected to the two short sides, wherein the first side plate is disposed corresponding to the short side, and the two long sides respectively correspond to The two color edges of the wide color gamut curved surface display are arranged, the light guide plate is located on the first bottom plate, the main light source is mounted on the first side plate corresponding to the short side of the light guide plate, and the compensation light source is installed corresponding to the long side of the light guide plate On the mounting seat, the mounting seat is located on the first bottom plate;

The two main light sources are two, and the first side plates are two, which are respectively disposed corresponding to the two short sides of the light guide plate, and the light guide plate is provided with a compensation light source on at least one side of the two long sides. The compensation light source located on one side of each long side is one or two, and the mounting base corresponding to the compensation light source is disposed on at least one of two sides of the corresponding two long sides of the light guide plate;

The first side plate is integrally extended from the first bottom plate or mounted on the first bottom plate, and the mounting seat is integrally extended from the first bottom plate or mounted on the first bottom plate;

Wherein, a reflective sheet is further disposed between the light guide plate and the first bottom plate of the heat dissipation bracket.
The backlight module of claim 11, wherein the main light source is a blue LED light strip, and a quantum tube is disposed between the main light source and a short side of the light guide plate.
The backlight module of claim 12, further comprising a quantum tube clamping device for holding and fixing the quantum tube, the quantum tube clamping device comprising a second bottom plate and a second side plate connecting the second bottom plate The second side plate is provided with a groove portion, and the quantum tube is mounted in the groove portion by a snap fit.
The backlight module of claim 13, wherein the quantum tube has an elliptical cross section, and the groove portion is an arcuate groove.
The backlight module of claim 13, wherein the second bottom plate of the quantum tube holding device is provided with a through hole, and the first bottom plate of the heat dissipation bracket is provided with a threaded hole, and is inserted through the through hole through a screw In the threaded hole, the second bottom plate of the quantum tube holding device is locked and fixed with the first bottom plate of the heat dissipation bracket, thereby fixing the quantum tube clamping device to the heat dissipation bracket.
The backlight module of claim 11, wherein the compensation light source is an LED light bar.
The backlight module of claim 16, wherein the LED light bar is a white LED light bar or other monochromatic LED light bar that is compensated according to a color gamut.