CN113189814A - Display device - Google Patents

Abstract

The invention discloses a display device, comprising: the backlight module is used for providing backlight; the display panel is positioned on the light emitting side of the backlight module and used for displaying images; the backlight module includes: the lamp strip is used as a backlight source; the lamp strip includes: the circuit board has a bearing function and is used for providing a driving signal; a light emitting device on the circuit board; and the light adjusting part is positioned in an orthographic projection area of the light emitting device on the circuit board and is used for adjusting the reflectivity of light rays incident on the circuit board. In order to solve the problem of uneven light emitting, the light adjusting part is arranged below the light emitting device, so that the reflectivity of the reflected light rays generating the bright rings is reduced, the reflectivity of the reflected light rays generating the dark rings is improved, the bright rings or the dark rings right above the light emitting device are eliminated, and the uniformity of the emergent light rays of the backlight module is improved.

Description

a display device

technical field

The present invention relates to the field of display technology, and in particular, to a display device.

Background technique

The liquid crystal display panel is a non-self-luminous display panel, and needs to cooperate with a backlight module to provide backlight to realize image display. Backlight modules are divided into direct-type backlight modules and edge-type backlight modules according to their structural forms. Direct type backlight modules are widely used in LCD TVs due to the advantages of good light-emitting viewing angle, high utilization rate, simple structure, and low cost.

Light Emitting Diode (LED for short) as a backlight source has the advantages of high backlight brightness, and the brightness will not decrease after long-term use, and the body of the LED backlight is thinner, which can realize light and thin products. The outgoing light of the LED has a Lambertian distribution. In order to improve the light intensity distribution, a lens will be installed on the light-emitting side of the LED. However, even if the lens is installed, the outgoing light cannot be completely uniform, and a bright or dark ring will appear directly above the LED. The uniformity of the emitted light needs to be further improved.

SUMMARY OF THE INVENTION

The present invention provides a display device for improving the uniformity of light emitted from a backlight module.

The present invention provides a display device, comprising:

Backlight module for providing backlight;

a display panel, located on the light-emitting side of the backlight module, used for image display;

The backlight module includes: a light bar as a backlight source;

The light bar includes:

The circuit board has a bearing function and is used to provide driving signals;

a light-emitting device, located on the circuit board;

The dimming part is located in the orthographic projection area of the light emitting device on the circuit board, and the dimming part is used to adjust the reflectivity of the light incident on the circuit board.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the light-emitting device includes:

a light-emitting diode, located on the circuit board;

a lens, located on the light-emitting side of the light-emitting diode;

The dimming part is arranged in the orthographic projection area of the lens on the circuit board.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the dimming part includes:

a ring-shaped reflection part for reflecting light to the light-emitting side of the light-emitting diode;

an annular light absorbing part for absorbing incident light to reduce the light reflected to the light-emitting side of the light-emitting diode;

The annular reflection part and the annular light absorption part are arranged around the light emitting diode.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the dimming part closest to the light-emitting diode is a ring-shaped reflection part;

The width of the annular reflection part closest to the light-emitting diode is 1mm-2mm.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the dimming part includes 1-3 annular light absorbing parts; the annular reflecting parts and the annular light absorbing parts are arranged alternately.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the width of the annular light absorbing portion is less than 3 mm, and the width of the annular reflecting portion is less than 3 mm.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the dimming portion includes only one annular light absorbing portion, and the annular light absorbing portion is an annular light absorbing portion with gradient color.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the maximum outer diameter of the annular light-absorbing portion with color gradient is smaller than or equal to the width of the circuit board.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the central brightness of the light-emitting device is greater than the brightness away from the center, and the color of the annular light-absorbing portion is formed by a direction away from the light-emitting diode. deep to shallow;

or,

The central brightness of the light emitting device is smaller than the brightness away from the center, and the color of the annular light absorbing portion is from light to dark along the direction away from the light emitting diode.

In a possible implementation manner, in the above-mentioned display device provided by the present invention, the material of the annular reflection part is white ink; the material of the annular light absorption part is carbon black or graphite.

The beneficial effects of the present invention are as follows:

The display device provided by the present invention includes: a backlight module for providing backlight; a display panel, located on the light-emitting side of the backlight module for image display; the backlight module includes: a light bar, which is used as a backlight source; the light bar includes: The circuit board has a bearing function and is used to provide driving signals; the light-emitting device is located on the circuit board; the dimming part is located in the orthographic projection area of the light-emitting device on the circuit board, and the dimming part is used to adjust the incident light on the circuit board. reflectivity of light. In order to solve the problem of uneven light output, a dimming part is arranged below the light-emitting device to reduce the reflectivity of the reflected light that produces the bright ring and increase the reflectivity of the reflected light that produces the dark ring, thereby eliminating the light-emitting device directly above the light-emitting device. Bright ring or dark ring to improve the uniformity of the light emitted by the backlight module.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present invention. Obviously, the drawings introduced below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic cross-sectional structure diagram of a display device provided by an embodiment of the present invention;

2 is a schematic top-view structural diagram of a backlight module provided by an embodiment of the present invention;

3 is a schematic cross-sectional structural diagram of a circuit board provided by an embodiment of the present invention;

4 is a schematic diagram of light intensity distribution of a light-emitting diode;

5 is a schematic cross-sectional structure diagram of a light-emitting device provided by an embodiment of the present invention;

FIG. 6 is one of schematic top-view structural diagrams of a light bar provided by an embodiment of the present invention;

FIG. 7 is a second schematic top-view structure diagram of a light bar provided by an embodiment of the present invention;

FIG. 8 is a third schematic top-view structure diagram of a light bar according to an embodiment of the present invention;

FIG. 9 is a schematic cross-sectional structural diagram of a backlight module provided by an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described below with reference to the accompanying drawings and embodiments. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all described by taking the accompanying drawings as an example, but changes can also be made as required, and the changes are all included in the protection scope of the present invention. The accompanying drawings of the present invention are only used to illustrate the relative positional relationship and do not represent the actual scale.

The liquid crystal display panel is a non-self-luminous display panel, and needs to cooperate with a backlight module for image display. The backlight module is divided into an edge-type structure and a direct-type structure. In the side-illuminated backlight module, the light source is arranged on the side, and the light guide plate is used to conduct and emit the light. Edge-type backlight modules are often used in small-sized display devices. The direct type backlight module can be applied to super-sized display devices, and because it does not require a light guide plate, the cost is lower. The direct type backlight module has high brightness and high energy utilization rate. In addition, the direct type backlight module can be better combined with the area dimming technology, which can effectively improve the display contrast of the display device, and can realize high dynamic image display.

At present, LEDs are often used as backlight sources in backlight modules, and the intensity distribution of the emitted light from the LEDs is not uniform. A bright or dark ring appears just above the .

In view of this, embodiments of the present invention provide a display device for improving the uniformity of light emitted from a backlight module.

FIG. 1 is a schematic cross-sectional structure diagram of a display device provided by an embodiment of the present invention. As shown in FIG. 1 , the display device provided by an embodiment of the present invention includes:

The backlight module 100 is used to provide backlight; the backlight module 100 can evenly emit light in the entire light-emitting surface, and is used to provide the display panel with light with sufficient brightness and uniform distribution, so that the display panel can display images normally.

The display panel 200 is located on the light-emitting side of the backlight module 100 and is used for image display. The display panel 200 has a plurality of pixel units arranged in an array, and each pixel unit can independently control the light transmittance and color of the backlight module 100 incident on the pixel unit, so that the light transmitted by all the pixel units is composed of displayed image.

The above-mentioned display device provided by the embodiment of the present invention may be a display device such as a liquid crystal display screen, a liquid crystal display, and a liquid crystal TV, or may be a mobile terminal such as a mobile phone, a tablet computer, and a smart photo album. In the display device, a backlight module is used to provide backlight, and the light emitted by the backlight module is modulated by the display panel to realize image display. The backlight module provided by the embodiment of the present invention can be partitioned, and the light sources in each partition can be independently dimmed, thereby realizing more refined dynamic control and improving the dynamic contrast of liquid crystal display.

FIG. 2 is a schematic top view structure of the backlight module provided by the embodiment of the present invention. As shown in FIG. 2 , the backlight module provided by the embodiment of the present invention may include a light bar 11 , and the light bar 11 is used as a backlight source.

In the backlight module, the light bar 11 is often used as the backlight source. The edge-type backlight module can set the light bar 11 on one side or both sides of the light guide plate, while the direct-type backlight module can use a plurality of light bars 11 to be arranged in parallel. way to provide backlight for the display panel. Generally, the brightness of the backlight module can be adjusted by adjusting the spacing of the light bars 11 and the number of light-emitting devices used on each light bar. The light-emitting devices on the light bar can be partitioned, and the light-emitting devices in each partition can be independently controlled, thereby optimizing the display effect of the display device with the regional dimming technology.

As shown in FIG. 2 , the light bar 11 includes: a circuit board 111 , a light emitting device 112 and a dimming part 113 .

The circuit board 111 has a bearing function and is used for providing driving signals.

The circuit board 111 is used to provide driving electrical signals for the light emitting device 112 . The light emitting device 112 can be electrically connected to the circuit board 111 by soldering. The circuit board 111 may be a printed circuit board (Printed Circuit Board, PCB for short), the backlight module may include a plurality of light bars, each light bar includes a strip-shaped PCB, and the light emitting device 112 is welded on the PCB. And the light bars are arranged in parallel according to the set direction. By controlling the spacing between the light bars and the spacing between the light-emitting devices 112 on each circuit board 111, backlight modules for display devices in different scenarios can be designed. By controlling the number of light emitting devices 112 used, the cost of the backlight module can also be controlled.

FIG. 3 is a schematic cross-sectional structure diagram of a circuit board provided by an embodiment of the present invention. As shown in FIG. 3 , the circuit board 111 may include a substrate 111a, a circuit layer 111b, and an insulating layer 111c.

The substrate 111a can be an aluminum substrate, which has a bearing function. The circuit layer 111b may use metal copper to form a circuit through an etching process, so as to drive the light emitting device 112 to emit light. The insulating layer 111c exposes the pads in the circuit layer where the light emitting device 112 is soldered to the outside and covers the rest, so as to protect the circuit layer 111b.

As shown in FIG. 2 , the light emitting device 112 is located on the circuit board 111 .

The light emitting device 112 can be soldered on the exposed pad of the circuit board 111 , and after soldering, the light emitting device 112 can be controlled to emit light by controlling the driving signal of the circuit board 111 . The light emitting device 112 provided in the embodiment of the present invention can emit monochromatic light, for example, the light emitting device 112 can emit blue light, and the blue light source and the quantum dot film layer can provide a backlight with a high color gamut.

As shown in FIG. 2 , the dimming part 113 is located in the orthographic projection area of the light emitting device 112 on the circuit board 111 , and the dimming part 113 is used to adjust the reflectivity of the light incident on the circuit board.

In order to solve the problem of uneven light output in the embodiment of the present invention, a dimming part 113 for adjusting the light reflectivity is provided on the circuit board 111. The part of the light that produces the bright ring and the dark ring comes from the reflected light of the light emitting device 112 in the orthographic projection area of the circuit board 111 . In order to adjust the reflectivity of this part of the light so as to make the light directly above the light-emitting device 112 more uniform, a dimming part 113 is arranged below the light-emitting device 112 to reduce the reflectivity of the reflected light that produces the bright ring, so that the reflection of the dark ring is reduced. The reflectivity of the light is improved, thereby eliminating the bright ring or the dark ring directly above the light emitting device 112 and improving the uniformity of the light emitted by the backlight module.

In the specific implementation, light-emitting diodes can be used as light sources. As shown in Figure 4, the light-emitting type of the LEDs is Lambertian, and the illuminance is uneven. Therefore, a lens with a free-form surface can be arranged on the light-emitting side of the LED to make the light pass through the lens. Achieve uniform illumination.

FIG. 5 is a schematic cross-sectional structure diagram of a light-emitting device provided by an embodiment of the present invention. As shown in FIG. 5 , the light-emitting device includes:

The light emitting diode 1121 is located on the circuit board 111 .

The light-emitting diode 1121 uses a solid semiconductor chip as a light-emitting material. Compared with traditional lamps, light-emitting diodes are energy-saving, environmentally friendly, have better color rendering and response speed, and are widely used as light sources in backlight modules. However, the intensity of the outgoing light of the light emitting diode 1121 is concentrated in a smaller emission angle, and in order to make the outgoing light more uniform, a lens 1121 may be provided on the light outgoing side of the light emitting diode 1121 .

The lens 1122 is located on the light-emitting side of the light-emitting diode 1121 .

The lens 1122 can be a free-form surface lens, for example, the lens can be a refractive lens, and the side of the refractive lens facing the light emitting diode 1121 has an accommodating cavity, and the light emitting diode 1221 is located in the accommodating cavity. The refractive lens can be centrally symmetric, and can homogenize the light emitted from the light emitting diodes 1121 in all directions.

The dimming part 113 may be disposed in the orthographic projection area of the lens 1122 on the circuit board 111 . Through ray tracing, it can be found that the reason for the uneven light directly above the light-emitting device comes from the reflected light below the lens 1122, so the dimming part 113 can be arranged in the orthographic projection area of the lens 1121, and the light incident on the circuit board 111 can be affected by the light. The reflectivity is adjusted, so that the outgoing light directly above the light emitting device 112 is more uniform.

6 is one of the schematic top-view structural diagrams of the light bar provided by the embodiment of the present invention. As shown in FIG. 6 , the dimming part includes: a ring-shaped reflection part 113a and a ring-shaped light absorption part 113b, and the ring-shaped reflection part 113a and the ring-shaped light absorption part The portion 113b is disposed around the light emitting diode 1121 .

The annular reflecting portion 113a is used for reflecting the incident light toward the light-emitting side of the light-emitting diode 1121;

The annular light absorbing portion 113b is used for absorbing incident light, so as to reduce the light reflected to the light emitting side of the light emitting diode 1121 .

The light emitting diode 1121 emits light in all directions, and the light entering the circuit board 111 after passing through the action of the lens 1122 presents a centrally symmetric shape. The annular reflecting portion 113a can be arranged at a position where less light is incident on the circuit board 111, and the annular light absorbing portion 113b can be arranged at a position where more light is incident on the circuit board 111. The light effect can reduce the reflection of light in places where the light is more concentrated, and enhance the reflection of light in places where the light is more sparse, so that the light reflected by the dimming part is evenly distributed in each position, avoiding the phenomenon of bright rings or dark rings.

As shown in FIG. 6 , the dimming portion closest to the light emitting diode 1121 is the annular reflection portion 113a.

A ring-shaped reflector 113a is arranged around the light-emitting diode 1121. A large part of the light from the light-emitting diode will be reflected to the position of the circuit board near the light-emitting diode 1121 after passing through the action of the lens 1122. Therefore, the ring-shaped reflector is set at this position. 113a, the light in this area can be reflected to the light-emitting side of the light emitting diode, thereby avoiding the loss of light and improving the utilization rate of the light source.

In a specific implementation, as shown in FIG. 6 , the width w1 of the annular reflection portion 113 a closest to the light emitting diode 1121 is 1 mm-2 mm.

The outgoing light of the light-emitting diode 1121 has a Lambertian distribution, and the outgoing light is concentrated in a small angle range, and after being reflected by the lens 1122, this part of the light will be incident on the circuit board 111 near the light-emitting diode 1121. The space is limited, and setting the width w1 of the annular reflection part 113a closest to the light-emitting diode 1121 to 1mm-2mm can not only avoid the loss of a large amount of light, but also will not affect the setting of the annular light absorbing part 113b, so that the reflection can be achieved. The role of light adjustment.

In an implementation manner, as shown in FIG. 6 , the dimming portion may include at least one annular light absorbing portion 113b, and in the embodiment of the present invention, the dimming portion may include 1-3 annular light absorbing portions 113b; An annular reflection part 113a may be provided between two adjacent annular light absorption parts 113b to be spaced apart from each other, so that the annular reflection parts 113a and the annular light absorption parts 113b are alternately arranged.

The annular reflection part 113a and the annular light absorption part 113b are alternately arranged, the spacing distance of the annular light absorption part 113b can be adjusted by adjusting the width of the annular reflection part 113a, and the annular reflection can be adjusted by adjusting the width of the annular light absorption part 113b The separation distance of the parts 113a. By tracing the light directly above the light emitting device to generate the bright ring and the dark ring, the corresponding position on the circuit board 111 can be found, so that the annular reflection part 113a or the annular light absorption part 113b can be accurately arranged, and the installation position is more flexible.

In specific implementation, as shown in FIG. 6 , the width w2 of the annular reflection part 113a is less than 3 mm, and the width w3 of the annular light absorption part 113b is less than 3 mm. Since the area under the lens 1122 is limited, in order to improve the adjustment accuracy of the light adjustment part, The widths of the annular reflection part 113a and the annular light absorption part 113b can be reduced. In the embodiment of the present invention, the widths of the annular reflection part 113a and the annular light absorption part 113b can be set to be less than 3 mm, which can meet the process conditions. On the premise of refining the dimming performance of the dimming part.

FIG. 7 and FIG. 8 are another top-view structural schematic diagram of the light bar provided by the embodiment of the present invention. In another implementation manner, as shown in FIG. 7 and FIG. 8 , the dimming part may only include a ring-shaped The light absorbing portion 113b, and the annular light absorbing portion 113b is an annular light absorbing portion with a color gradient.

As shown in FIG. 7 and FIG. 8 , the dimming part may include an annular reflection part 113a and an annular light absorption part 113b with a gradient of color. The annular reflecting portion 113a is disposed adjacent to the light emitting diode 1121, and the annular light absorbing portion 113b is disposed outside the annular reflecting portion 113a. The solution of providing only one annular light absorbing portion is more convenient to operate. It is only necessary to set an appropriate width of the annular light absorbing portion 113b, and the light reflectivity can be adjusted by adjusting the amount of the light absorbing material.

In specific implementation, the maximum outer diameter of the annular light absorbing portion 113b with gradual color change may be set to be smaller than or equal to the width of the circuit board 111 . Normally, the width of the circuit board 111 will be set in consideration of the circuit in the circuit board and the safety distance of the circuit. The lens 1122 of the light-emitting device generally does not exceed the width of the circuit board 111, so the maximum width of the annular light absorbing portion 113b can be set. The outer diameter is smaller than or equal to the width of the circuit board 111 . For example, the annular light absorbing portion 113b with gradient color can be arranged in a circular shape, and the outer diameter of the circular ring can be equal to the width of the circuit board 111 .

The color depth of the annular light absorbing portion with gradient color can be set according to the light emitting distribution of the light emitting device 112 .

When the central brightness of the light-emitting device 112 is greater than the brightness far from the center, it means that the reflected light at the central position directly above the light-emitting device 112 is relatively concentrated, and this part of the light is reflected from the position on the circuit board 111 close to the light-emitting diode 1121, such as As shown in FIG. 7 , the color of the annular light absorbing portion 113b can be set from dark to light along the direction away from the light emitting diode 1121 , so that the incident light on the side close to the light emitting diode 1121 is absorbed more than the side far from the light emitting diode 1121 Therefore, the reflected light to the center position directly above the light emitting device 112 is reduced, so that the light incident on the circuit board is more uniform after the effect of the annular light absorbing part 113b with gradual color change.

When the central brightness of the light-emitting device 112 is lower than the brightness far from the center, it means that the reflected light at the central position directly above the light-emitting device 112 is relatively sparse, the light is concentrated at the position far from the center, and the part of the light at the position with high brightness is emitted by the circuit board 111 As shown in FIG. 8 , the color of the annular light-absorbing portion 113b can be set from light to dark along the direction away from the light-emitting diode 1121, so that the incident light on the side close to the light-emitting diode 1121 The degree of absorption is less than that of the incident light on the side farther from the light-emitting diode 1121, thereby reducing the reflected light far from the center position directly above the light-emitting device 112, so that the light incident on the circuit board passes through the color-gradient annular light-absorbing portion 113b After the effect, the reflected light is more uniform.

In the specific implementation, the material of the annular reflection part 113a can be made of white ink. The white ink has a high reflectivity, up to 90% or more, which can reflect the light incident on its surface, and can be coated in the production process. The light-emitting diode 1121 is formed around the light-emitting diode 1121 in the manner of , and then the annular light-absorbing portion 113b is arranged on the white ink coating layer at intervals, or the annular light-absorbing portion 113b with gradient color is arranged.

The material of the annular light absorbing part 113b can be carbon black or graphite. Generally, carbon black or graphite can be dispersed in a colloidal material such as epoxy resin, and its light absorbing ability can be controlled by controlling the amount of carbon black or graphite. By providing the annular light absorbing portion on the white ink layer, the shape of the annular light absorbing portion can be formed.

The color-graded annular light-absorbing portion 113b can be realized by controlling the coating thickness. For example, when the color of the color-graded annular light-absorbing portion 113b changes from light to dark along the direction away from the light-emitting diode 1121 , the color of the light-emitting diode 1121 can be adjusted closer to the light-emitting diode 1121 . The thickness of the carbon black coating on the side is smaller than the thickness of the carbon black coating on the side away from the light-emitting diode 1121; when the color of the annular light-absorbing part 113b with gradual color changes from dark to light along the direction away from the light-emitting diode 1121, it can make The thickness of the carbon black coating on the side close to the light emitting diode 1121 is greater than the thickness of the carbon black coating on the side away from the light emitting diode 1121, thereby achieving the effect of color gradation.

FIG. 9 is a schematic cross-sectional structure diagram of a backlight module provided by an embodiment of the present invention. As shown in FIG. 9 , the backlight module further includes: a diffusion plate 12 and an optical film 13 .

The diffuser plate 12 is located on the light-emitting side of the light bar, and is separated from the light bar by a set distance.

The distance from the light emitting device 112 to the diffusion plate 12 satisfies the light mixing distance of the light emitting device 112 . A sufficiently large distance is set between the light-emitting device 112 and the diffuser plate 12, so that the light emitted from the adjacent light-emitting devices 112 can be sufficiently mixed, so that the brightness near the center of the light-emitting device 112 and the distance between the adjacent light-emitting devices 112 The brightness of the junction position is basically the same.

The function of the diffuser plate 12 is to further homogenize the light emitted from the light emitting device 112 . The diffuser plate 12 is usually provided with a scattering particle material. After the light enters the diffuser plate, the scattering material causes the light to continuously refract and reflect, so as to achieve the effect of dispersing the light, thereby achieving the effect of uniform light. The material used for the diffuser plate is generally selected from at least one of polymethyl methacrylate PMMA, polycarbonate PC, polystyrene material PS, and polypropylene PP, which is not limited here.

The optical film 13 is located on the side of the diffuser plate 12 away from the light bar. The optical film 13 may include a quantum dot film layer, a prism sheet, a reflective polarizer, etc., which are not limited herein.

The quantum dot film can be matched with monochromatic light-emitting devices to meet higher color gamut requirements. The light emitting device 112 may emit blue light, and the quantum dot film layer may include red quantum dot materials and green quantum dot materials. The red quantum dot material emits red light under the excitation of blue light, and the green quantum dot material emits green light under the excitation of blue light. The red light and green light emitted by the quantum dot film layer are combined with the transmitted blue light and mixed into white light, which provides a backlight for the display panel.

The prism sheet can change the outgoing angle of the light, for example, the outgoing light can be converged to the front view angle, so that the light outgoing from the backlight module is relatively collimated.

The reflective polarizer can improve the utilization rate of light, and at the same time make the outgoing light have the property of polarization, omitting the use of the polarizer under the liquid crystal display panel.

The display device provided by the embodiment of the present invention includes: a backlight module, which is used for providing backlight; a display panel, which is located on the light-emitting side of the backlight module and used for image display; the backlight module includes: a light bar, which is used as a backlight source; It includes: a circuit board, which has a bearing function and is used to provide driving signals; a light-emitting device, located on the circuit board; a light-adjusting part, located in the orthographic projection area of the light-emitting device on the circuit board, and the light-adjusting part is used to adjust the incident to the circuit board. reflectivity of light. In order to solve the problem of uneven light output, a dimming part is arranged below the light-emitting device to reduce the reflectivity of the reflected light that produces the bright ring and increase the reflectivity of the reflected light that produces the dark ring, thereby eliminating the light-emitting device directly above the light-emitting device. Bright ring or dark ring to improve the uniformity of the light emitted by the backlight module.

Although preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A display device, comprising:

the backlight module is used for providing backlight;

the display panel is positioned on the light emitting side of the backlight module and used for displaying images;

the backlight module includes: the lamp strip is used as a backlight source;

the lamp strip includes:

the circuit board has a bearing function and is used for providing a driving signal;

a light emitting device on the circuit board;

and the light adjusting part is positioned in an orthographic projection area of the light emitting device on the circuit board and is used for adjusting the reflectivity of light rays incident on the circuit board.

2. The display apparatus according to claim 1, wherein the light emitting device comprises:

the light emitting diode is positioned on the circuit board;

the lens is positioned on the light emitting side of the light emitting diode;

the light adjusting part is arranged in an orthographic projection area of the lens on the circuit board.

3. The display device according to claim 2, wherein the light adjustment section includes:

an annular reflection part for reflecting light to the light emitting side of the light emitting diode;

the annular light absorption part is used for absorbing incident light so as to reduce the light reflected to the light emitting side of the light emitting diode;

the annular reflecting portion and the annular light absorbing portion are disposed around the light emitting diode.

4. The display device according to claim 3, wherein the light modulation section closest to the light emitting diode is an annular reflection section;

the width of the annular reflecting part nearest to the light emitting diode is 1mm-2 mm.

5. The display device according to claim 3, wherein the dimming part includes 1 to 3 annular light absorbing parts; the annular reflecting portions and the annular light absorbing portions are alternately arranged.

6. The display device of claim 5, wherein the width of the annular light absorbing portion is less than 3mm and the width of the annular reflecting portion is less than 3 mm.

7. The display device according to claim 3, wherein the dimming portion includes only one annular light absorbing portion, and the annular light absorbing portion is a color-gradation annular light absorbing portion.

8. The display device of claim 7, wherein a maximum outer diameter of the color-graded annular light absorbing portion is less than or equal to a width of the circuit board.

9. The display apparatus according to claim 7, wherein a central luminance of the light emitting device is greater than a luminance away from the center, and a color of the annular light absorbing portion is from dark to light in a direction away from the light emitting diode;

or,

the central brightness of the light-emitting device is smaller than the brightness far away from the center, and the color of the annular light absorption part is from shallow to deep along the direction far away from the light-emitting diode.

10. The display device according to claim 3, wherein a material of the annular reflecting portion is white ink; the annular light absorption part is made of carbon black or graphite.

Images