Light-emitting device, backlight module and display device

Abstract

The present invention discloses a light-emitting device, a backlight module and a display device. The light-emitting device includes a light-emitting chip and at least two dimming boxes arranged in parallel. Each dimming box includes a first substrate, a second substrate, a common electrode, a pixel electrode and a plurality of liquid crystals. The first substrate is arranged on the light-emitting side of the light-emitting chip; the second substrate is arranged on the side of the first substrate away from the light-emitting chip and is arranged opposite to the first substrate; one of the first substrate and the second substrate is provided with a common electrode; the other of the first substrate and the second substrate is provided with a common electrode; a plurality of liquid crystals are arranged between the first substrate and the second substrate; in the direction from the first substrate to the second substrate, the extension direction of the long axis center line of the plurality of liquid crystals in at least two dimming boxes is different. The technical solution of the present invention can achieve a local anti-peeping effect by arranging a dimming box in the light-emitting device, so that the light emitted by the light-emitting chip in the light-emitting device and the light emitted after being modulated by the dimming box can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a light-emitting device, a backlight module using the light-emitting device, and a display device using the backlight module. Background Art

[0002] As people's living standards improve, more electronic products are becoming part of their daily lives. When using display devices in public places, users prefer not to be able to see their screens. Therefore, display devices with privacy protection are becoming increasingly popular. However, traditional privacy protection displays can only switch between full privacy protection and full non-privacy protection modes, and cannot adjust the privacy protection effect for any specific location on the screen. Summary of the Invention

[0003] The main purpose of the present invention is to provide a light emitting device, aiming to improve the problem of positional deviation of openings of a plastic part on a package.

[0004] To achieve the above-mentioned purpose, the light-emitting device proposed in the present invention includes a light-emitting chip and at least two dimming boxes arranged in parallel, each of the dimming boxes includes a first substrate, a second substrate, a common electrode, a pixel electrode and a plurality of liquid crystals, the first substrate is arranged on the light-emitting side of the light-emitting chip; the second substrate is arranged on the side of the first substrate away from the light-emitting chip and is arranged opposite to the first substrate; one of the first substrate and the second substrate is provided with the common electrode; the other of the first substrate and the second substrate is provided with the common electrode; the plurality of liquid crystals are arranged between the first substrate and the second substrate; in the direction from the first substrate to the second substrate, the extension direction of the long axis center line of the plurality of liquid crystals in at least two of the dimming boxes is different.

[0005] In one embodiment, three dimming boxes are arranged in parallel and are defined as a first dimming box, a second dimming box and a third dimming box respectively; a line connecting the long axis centers of the multiple liquid crystals in the second dimming box extends in a direction perpendicular to the first substrate, and a line connecting the long axis centers of the multiple liquid crystals in the first dimming box and a line connecting the long axis centers of the multiple liquid crystals in the third dimming box are both bent in a direction away from the second dimming box.

[0006] In one embodiment, the long axis extension direction of the plurality of liquid crystals is parallel to the surface of the first substrate.

[0007] In one embodiment, a first polarizer is provided on a side of the first substrate facing away from the second substrate, and a second polarizer is provided on a side of the second substrate facing away from the first substrate. The polarization direction of the first polarizer is perpendicular to the polarization direction of the second polarizer.

[0008] In one embodiment, a first groove is provided on a side of the first substrate facing the second substrate, a second groove is provided on a side of the second substrate facing the first substrate, and an extension direction of the first groove is perpendicular to an extension direction of the second groove.

[0009] In one embodiment, a yellow fluorescent film is provided on a side of the second substrate facing the first substrate.

[0010] In one embodiment, the light-emitting device further includes a base and a protective cover, the light-emitting chip is arranged on the base, the protective cover is connected to the base, and together with the base, they form a closed installation cavity, and the dimming box and the light-emitting chip are located in the installation cavity.

[0011] The present invention further provides a backlight module, comprising a back panel and the above-mentioned light-emitting device, wherein a plurality of the light-emitting devices are provided and arranged on the back panel in an array.

[0012] In one embodiment, the backlight module also includes a diffusion plate, and the diffusion plate includes a first area and a second area, the first area is arranged relative to the light-emitting device, and the second area is arranged relative to the gap position between two adjacent light-emitting devices, and the density of the diffusion particles in the first area is less than the density of the diffusion particles in the second area.

[0013] The present invention further provides a display device, comprising a display panel and the above-mentioned backlight module, wherein the display panel is arranged on the light-emitting side of the backlight module.

[0014] The technical solution of the present invention is to provide a dimming box in the light-emitting device, so that the light emitted by the light-emitting chip in the light-emitting device is emitted after being modulated by the dimming box. Specifically, there are at least two dimming boxes, each of which includes a first substrate, a second substrate, and a plurality of liquid crystals arranged between the first substrate and the second substrate, and the extension direction of the long axis center line of the plurality of liquid crystals in at least two dimming boxes is different, so that the light emitted by the light-emitting chip can be dispersed and propagated in different directions when passing through at least two different dimming boxes, thereby facilitating the realization of a wide viewing angle mode of the display device. In addition, by also providing a common electrode and a pixel electrode in each dimming box, and the common electrode and the pixel electrode are respectively provided on the first substrate and the second substrate, when there is a voltage difference between the common electrode and the pixel electrode, the liquid crystal is driven to deflect, thereby changing the propagation direction of the light, such as blocking the propagation of the light. Therefore, when the liquid crystal in at least one of the dimming boxes blocks the propagation of the light, it is convenient to realize the narrow viewing angle mode of the display device. Furthermore, since the dimming box is arranged in the light-emitting device, when a plurality of light-emitting devices are provided in the display device, each light-emitting device of the display device can be switched between a wide viewing angle and a narrow viewing angle, thereby achieving a local anti-peeping effect, and in the narrow viewing angle mode, most of the light energy is concentrated together and emitted in a single direction, thereby ensuring a light-emitting effect with high brightness and high color gamut in the narrow viewing angle mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the internal structure of a light emitting device according to an embodiment of the present invention when in a wide viewing angle mode;

[0017] Figure 2 This is a schematic diagram of light emission from a light emitting device in a wide viewing angle according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of a light emitting device according to an embodiment of the present invention when in a narrow viewing angle mode;

[0019] Figure 4 This is a schematic diagram of light emission from a light emitting device in a narrow viewing angle according to an embodiment of the present invention;

[0020] Figure 5 This is a top view of the backlight module after the back plate and the light-emitting device are installed in the second embodiment of the present invention;

[0021] Figure 6 This is a front view of a backlight module according to a second embodiment of the present invention;

[0022] Figure 7 This is a front view of a display device according to a third embodiment of the present invention.

[0023] Description of Figure Numbers:

[0024]

[0025]

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] Example 1:

[0031] The present invention provides a light emitting device 100 .

[0032] In the embodiments of the present invention, please refer to Figures 1 to 4The light-emitting device 100 includes a light-emitting chip 110 and at least two dimming boxes 120 arranged in parallel. Each dimming box 120 includes a first substrate 121, a second substrate 122, a common electrode, a pixel electrode and a plurality of liquid crystals 123. The first substrate 121 is arranged on the light-emitting side of the light-emitting chip 110; the second substrate 122 is arranged on the side of the first substrate 121 away from the light-emitting chip 110 and is arranged opposite to the first substrate 121; one of the first substrate 121 and the second substrate 122 is provided with a common electrode; the other of the first substrate 121 and the second substrate 122 is provided with a common electrode; the plurality of liquid crystals 123 are arranged between the first substrate 121 and the second substrate 122; in the direction from the first substrate 121 to the second substrate 122, the extension direction of the long axis center line of the plurality of liquid crystals 123 in at least two dimming boxes 120 is different.

[0033] The light-emitting device 100 includes a dimming box 120, which is located on the light-emitting side of the light-emitting chip 110. The light emitted by the light-emitting chip 110 is first adjusted by the dimming box 120. Each dimming box 120 includes a first substrate 121, a second substrate 122, and a liquid crystal 123 located between the first substrate 121 and the second substrate 122. One of the first substrate 121 and the second substrate 122 is provided with a common electrode, and the other is provided with a pixel electrode. When the voltage difference between the common electrode and the pixel electrode is zero, the liquid crystal 123 between the first substrate 121 and the second substrate 122 does not deflect, that is, it maintains its initial state. When the voltage difference between the common electrode and the pixel electrode is not zero, the liquid crystal 123 between the first substrate 121 and the second substrate 122 deflects, thereby changing the emission direction of the light. In the technical solution of the present invention, by providing at least two dimming boxes 120, and by extending the longitudinal center lines of the multiple liquid crystals 123 in the two dimming boxes 120 in different directions, when the voltage difference between the common electrode and the pixel electrode is zero, the light emitted by the light-emitting chip 110 is dispersed in different directions when passing through the two dimming boxes 120, thereby achieving a wide viewing angle. When pressure is applied to one of the dimming boxes 120, the liquid crystals 123 in the pressurized dimming box 120 are deflected, thereby blocking the propagation of light. The light is confined to propagation along the longitudinal center line of the liquid crystals 123 in the unpressurized dimming box 120, thereby limiting the light dispersion angle and facilitating the narrow viewing angle.

[0034] Specifically, the dimming boxes 120 in the technical solution of the present invention can be provided with two, three, four, five, six, or more. For example, in one example, when two dimming boxes 120 are provided, the directions of the long axis center lines connecting the multiple liquid crystals 123 in the two dimming boxes 120 can be respectively vertical and inclined at an acute angle to the vertical direction, or the directions of the long axis center lines connecting the multiple liquid crystals 123 in the two dimming boxes 120 can both be inclined at an acute angle to the vertical direction, and the inclination directions of the two long axis center lines are opposite. The long axis of the liquid crystal 123 can be arranged parallel to the first substrate 121 in a natural state. When it is necessary to adjust to a wide viewing angle mode, the common electrode and pixel electrode of the two dimming boxes 120 can be de-pressurized, thereby ensuring that the light emitted by the light-emitting chip 110 can be dispersed when passing through the two dimming boxes 120, thereby achieving a wide viewing angle effect. When a narrow viewing angle is required, one of the dimming boxes 120 can be pressurized, i.e., a certain voltage difference is created between the common electrode and the pixel electrode of the dimming box 120. Under this pressure difference, the liquid crystal 123 in the dimming box 120 is deflected, with its long axis perpendicular to the first substrate 121 and the second substrate 122, thereby blocking light from passing through and propagating in the dimming box 120, thereby achieving the effect of limiting the light angle and realizing a narrow viewing angle. Alternatively, the long axis of the liquid crystal 123 can be arranged perpendicular to the first substrate 121 in a natural state. In this case, when adjustment to a wide viewing angle is required, all the dimming boxes 120 can be pressurized, that is, a certain voltage difference is created between the common electrode and the pixel electrode of the dimming box 120. Under this pressure difference, the liquid crystals 123 in these dimming boxes 120 are deflected so that their long axes can be parallel to the first substrate 121, so as to facilitate the propagation of light from the dimming box 120 along the center line of the long axis, thereby achieving the effect of dispersed propagation of light through different dimming boxes 120 to achieve a wide viewing angle. When it is necessary to adjust to a narrow viewing angle mode, pressure can be applied to only the common electrode and pixel electrode of one dimming box 120, while pressure is not applied to the common electrode and pixel electrode of the other dimming box 120, thereby ensuring that the light emitted by the light-emitting chip 110 can only be transmitted through the dimming box 120 that has been pressurized. Since the long axis of the liquid crystal 123 of the unpressurized dimming box 120 is perpendicular to the first substrate 121, light cannot be transmitted through the unpressurized dimming box 120, thereby also achieving a wide viewing angle effect.

[0035] In another example, three dimming boxes 120 may be provided, and the extending directions of the long axis center line of the plurality of liquid crystals 123 in each dimming box 120 may be tilted to the left, perpendicular to the direction of the first substrate 121, and tilted to the right. Based on the premise that the long axis of the liquid crystal 123 is arranged parallel to the first substrate 121 in a natural state, when it is necessary to adjust to a wide viewing angle, the common electrode and the pixel electrode can be unpressurized, so that the light can be dispersed and propagated in three directions when passing through the three dimming boxes 120; when it is necessary to adjust to a narrow viewing angle, one or two of the dimming boxes 120 can be pressurized, that is, a certain pressure difference is created between the common electrode and the pixel electrode of the one or two dimming boxes 120. Under this pressure difference, the liquid crystal 123 in the one or two dimming boxes 120 is deflected, and its long axis is perpendicular to the first substrate 121 and the second substrate 122, so as to block the light from passing through and propagating through the one or two dimming boxes 120, and can only pass through the dimming box 120 that is not pressurized, thereby achieving the effect of limiting the light angle and achieving a narrow viewing angle. Alternatively, based on the premise that the long axis of the liquid crystal 123 is arranged perpendicular to the first substrate 121 in a natural state, when it is necessary to adjust to a wide viewing angle, all the dimming boxes 120 can be pressurized, that is, a certain voltage difference is created between the common electrode and the pixel electrode of the dimming box 120. Under this pressure difference, the liquid crystals 123 in these dimming boxes 120 are deflected so that their long axes can be parallel to the first substrate 121, so as to facilitate the propagation of light from these dimming boxes 120 along the center line of the long axes, thereby achieving light dispersion and propagation to achieve a wide viewing angle effect. When it is necessary to adjust to a narrow viewing angle mode, pressure can be applied to only the common electrode and pixel electrode of one dimming box 120, while pressure is not applied to the common electrode and pixel electrode of the other dimming box 120, thereby ensuring that the light emitted by the light-emitting chip 110 can only be transmitted through the dimming box 120 that has been pressurized. Since the long axis of the liquid crystal 123 of the unpressurized dimming box 120 is perpendicular to the first substrate 121, light cannot be transmitted through the unpressurized dimming box 120, thereby also achieving a wide viewing angle effect.

[0036] In addition, it is understood that by improving the structure of the light-emitting device 100 in the present invention, that is, by controlling the light emission direction of the light-emitting device 100, it is possible to switch between wide and narrow viewing angles in a local area of ​​a direct-lit display device, thereby meeting the need for privacy protection in a local area and achieving a more precise privacy protection control effect. In addition, because the light-emitting device 100 in the present invention can concentrate most of its light energy and emit it in a single direction in the narrow viewing angle mode, it can ensure a light emission effect with high brightness and a high color gamut in the narrow viewing angle mode.

[0037] The technical solution of the present invention provides a dimming box 120 within the light-emitting device 100. Light emitted by the light-emitting chip 110 within the light-emitting device 100 is modulated by the dimming box 120 and then emitted. Specifically, at least two dimming boxes 120 are provided, each of which includes a first substrate 121, a second substrate 122, and a plurality of liquid crystals 123 disposed between the first substrate 121 and the second substrate 122. Furthermore, the longitudinal centerline of the plurality of liquid crystals 123 in at least two dimming boxes 120 extends in different directions. This allows light emitted by the light-emitting chip 110 to be dispersed and propagated in different directions when passing through the at least two different dimming boxes 120, thereby facilitating the realization of a wide viewing angle mode for the display device. In addition, by further disposing a common electrode and a pixel electrode within each dimming box 120, and by disposing the common electrode and the pixel electrode on the first substrate 121 and the second substrate 122, respectively, a voltage difference between the common electrode and the pixel electrode drives the liquid crystal 123 to deflect, thereby changing the propagation direction of light, for example, blocking the propagation of light. Therefore, when the liquid crystal 123 within at least one of the dimming boxes 120 blocks the propagation of light, a narrow viewing angle mode of the display device is easily achieved. Furthermore, since the dimming box 120 is disposed within the light-emitting device 100, when a display device includes multiple light-emitting devices 100, each light-emitting device 100 of the display device can be switched between wide and narrow viewing angles, thereby achieving a partial privacy protection effect. In the narrow viewing angle mode, most of the light energy is concentrated and emitted in a single direction, thereby ensuring a high brightness and high color gamut light output effect in the narrow viewing angle mode.

[0038] Furthermore, in this example, three dimming boxes 120 are arranged in parallel and are defined as a first dimming box 120a, a second dimming box 120b and a third dimming box 120c respectively; the long axis center line of the multiple liquid crystals 123 in the second dimming box 120b extends in a direction perpendicular to the first substrate 121, and the long axis center line of the multiple liquid crystals 123 in the first dimming box 120a and the long axis center line of the multiple liquid crystals 123 in the third dimming box 120c are both bent in a direction away from the second dimming box 120b.

[0039] By sequentially arranging the first dimming box 120a, the second dimming box 120b and the third dimming box 120c, the second dimming box 120b is located in the middle, and the first dimming box 120a and the third dimming box 120c are distributed on opposite sides of the second dimming box 120b. The long axis center line of the plurality of liquid crystals 123 of the second dimming box 120b is extended in a direction perpendicular to the first substrate 121, and the long axis center line of the plurality of liquid crystals 123 in the first dimming box 120a and the long axis center line of the plurality of liquid crystals 123 in the third dimming box 120c are both bent in a direction away from the second dimming box 120b. Then, the bending direction of the long axis center line of the plurality of liquid crystals 123 in the first dimming box 120a and the bending direction of the long axis center line of the plurality of liquid crystals 123 in the third dimming box 120c are opposite to each other. For example, the bending directions of these two center lines can be bent to the left and to the right, respectively. As a result, the light emitting device 100 in this example can propagate in a direction perpendicular to the first substrate 121, in a direction tilted to the left, and in a direction tilted to the right in a wide viewing angle mode, thereby making the propagation direction of light wider and facilitating the achievement of a wide viewing angle effect. When it is necessary to adjust to a narrow viewing angle mode, the deflection direction of the liquid crystals 123 of the first dimming box 120a and the third dimming box 120c can be adjusted so that the liquid crystals 123 are deflected to an angle that prevents light from passing through. That is, the liquid crystals 123 are deflected to a direction in which their long axes are perpendicular to the first substrate 121, while the liquid crystals 123 of the second dimming box 120b are kept able to allow light to pass through. As a result, the light can only propagate in a direction perpendicular to the first substrate 121, thereby achieving a narrow viewing angle effect.

[0040] Furthermore, the long axis extension direction of the plurality of liquid crystals 123 is arranged parallel to the plate surface of the first substrate 121 .

[0041] It should be noted that in this example, the long axis extension direction of the liquid crystals 123 is defined based on the assumption that no voltage is applied to the common electrodes and pixel electrodes. By arranging the long axis extension direction of the multiple liquid crystals 123 parallel to the surface of the first substrate 121, light can pass through the dimming boxes 120 when no voltage is applied to the common electrodes and pixel electrodes, thereby achieving a wide viewing angle effect without applying voltage to any of the dimming boxes 120. It is understandable that the display device is in a wide viewing angle state most of the time. Therefore, by arranging the long axis extension direction of the multiple liquid crystals 123 parallel to the surface of the first substrate 121, no voltage is applied to the dimming boxes 120 most of the time. Only in special circumstances when the display device needs to be placed in anti-peep mode, voltage is applied to some of the dimming boxes 120, thereby achieving the effect of saving electricity.

[0042] Furthermore, a first polarizer (not shown) is provided on the side of the first substrate 121 away from the second substrate 122, and a second polarizer (not shown) is provided on the side of the second substrate 122 away from the first substrate 121. The polarization direction of the first polarizer is perpendicular to the polarization direction of the second polarizer.

[0043] Because the light emitted by the light-emitting chip 110 is directed in all directions, by providing a first polarizer on the side of the first substrate 121 facing away from the first substrate 121, the light emitted by the light-emitting chip 110 is filtered once after passing through the first polarizer, so that the light passing through the first polarizer is directed in only one direction, and each light is arranged in parallel, thereby facilitating the propagation of each light along the line connecting the long axis centers of the liquid crystals 123. Because the liquid crystals 123 are twisted 90 degrees in the direction from the first substrate 121 to the second substrate 122, the polarization direction of the second polarizer is arranged perpendicular to the polarization direction of the first polarizer, ensuring that the light twisted by the liquid crystals 123 can be smoothly emitted from the second substrate 122 and the second polarizer.

[0044] Furthermore, if Figure 1 or Figure 3 As shown, a first groove 121 a is provided on a side of the first substrate 121 facing the second substrate 122 , and a second groove is provided on a side of the second substrate 122 facing the first substrate 121 . The extension direction of the first groove 121 a is perpendicular to the extension direction of the second groove.

[0045] By providing a first groove 121a on the side of the first substrate 121 facing the second substrate 122 and a groove on the side of the second substrate 122 facing the first substrate 121, the arrangement of the liquid crystal 123 close to the first substrate 121 and the second substrate 122 can be guided to a certain extent. By setting the extension direction of the first groove 121a perpendicular to the extension direction of the second groove, the long axes of the liquid crystal 123 near the first groove 121a and the liquid crystal 123 near the second groove are perpendicular to each other on the premise that they are both parallel to the first substrate 121, so that the light can be twisted 90 degrees. In this way, when a second polarizer is provided on the second substrate 122 and the polarization direction of the second polarizer is perpendicular to the first polarizer, the effect of ensuring that light is emitted from the second substrate 122 without applying voltage can be achieved; and when a voltage is applied between the first substrate 121 and the second substrate 122, an electric field will be generated. This electric field causes the liquid crystals 123 to be arranged perpendicular to the first substrate 121. At this time, the light will not be twisted, making it impossible for the light to pass through the second substrate 122, thereby achieving an anti-peeping effect.

[0046] Furthermore, a yellow fluorescent film (not shown) is provided on a side of the second substrate 122 facing the first substrate 121 .

[0047] It can be understood that since the color of the light emitted by the light-emitting chip 110 is usually blue, by providing a yellow fluorescent film on the side of the second substrate 122 facing the first substrate 121, the blue light can excite the fluorescent substance on the fluorescent film when passing through the yellow fluorescent film, and then the light emitted from the second substrate 122 appears white.

[0048] Furthermore, if Figure 1 or Figure 3 As shown, the light-emitting device 100 further includes a base 130 and a protective cover 140. The light-emitting chip 110 is arranged on the base. The protective cover 140 is connected to the base 130 and together with the base 130, forms a closed installation cavity. The dimming box 120 and the light-emitting chip 110 are located in the installation cavity.

[0049] The light-emitting chip 110 is disposed on the base 130, which effectively secures the light-emitting chip 110. The protective cover 140 is connected to the base plate and, together with the base 130, forms a closed mounting cavity. The dimming box 120 and the light-emitting chip 110 are mounted within the mounting cavity. The protective cover 140 and the base 130 can jointly protect the light-emitting chip 110 and the dimming box 120, thereby ensuring the operational stability of the light-emitting chip 110 and the dimming box 120 and extending the service life of the light-emitting device 100.

[0050] Example 2:

[0051] The present invention also provides a backlight module, such as Figure 5 and Figure 6 As shown, the backlight module includes a backplate 200 and a light-emitting device 100. The specific structure of the light-emitting device 100 is similar to that of the above-mentioned embodiments. Since the present backlight module adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, and will not be described in detail here. A plurality of light-emitting devices 100 are provided, and the plurality of light-emitting devices 100 are arranged in an array on the backplate 200.

[0052] By providing a plurality of light-emitting devices 100 on the back panel 200 and arranging the light-emitting devices 100 in an array, on the one hand, the brightness of the backlight module can be improved, and on the other hand, the light-emitting angle of one or several independent light-emitting devices 100 can be controlled, thereby achieving a wide viewing angle effect or a local anti-peeping effect.

[0053] Furthermore, if Figure 6 As shown, the backlight module also includes a diffusion plate 300, which includes a first area and a second area. The first area is arranged opposite to the light-emitting device 100, and the second area is arranged opposite to the gap between two adjacent light-emitting devices 100, and the density of the diffusion particles in the first area is less than the density of the diffusion particles in the second area.

[0054] By providing the diffuser plate 300, a more uniform light emission effect can be achieved for the light emitted by the light-emitting device 100 after passing through the diffuser plate 300. Furthermore, by providing the diffuser plate 300 with a first region and a second region, with the first region positioned opposite the light-emitting device 100 and the second region positioned opposite the gap between two adjacent light-emitting devices 100, and with the density of the diffusing particles in the first region being smaller than the density of the diffusing particles in the second region, the diffusion effect of the portion of the diffuser plate 300 corresponding to the light-emitting device 100 is slightly reduced, thereby avoiding the problem of the light emission angle of the light emitted by the light-emitting device 100 being increased after passing through the diffuser plate 300 in narrow viewing angle mode.

[0055] Example 3:

[0056] The present invention also provides a display device, such as Figure 7 As shown, the display device includes a display panel 400 and a backlight module. The specific structure of the backlight module refers to the above embodiments. Since the present display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here. Among them, the display panel 400 is arranged on the light-emitting side of the backlight module.

[0057] By placing the display panel 400 on the light-emitting side of the backlight module, the backlight module can provide light for the display panel 400, allowing the display panel 400 to display an image for the user to view. The display panel 400 can be a display panel 400 in the prior art. Specifically, the display panel 400 includes an array substrate and a color filter substrate that are arranged relative to each other, and liquid crystal molecules 123 disposed between the array substrate and the color filter substrate. When the light-emitting device 100 of the backlight module is in wide-viewing mode, the image on the display panel 400 is also in wide-viewing mode; when the light-emitting device 100 of the backlight module is in narrow-viewing mode, the image on the display panel 400 is also in narrow-viewing mode.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A light-emitting device, comprising a light-emitting chip, characterized in that: The light emitting device further comprises at least two dimming boxes arranged in parallel, each of the dimming boxes comprising: a first substrate, the first substrate being provided on the light-emitting side of the light-emitting chip; a second substrate, the second substrate being disposed on a side of the first substrate away from the light-emitting chip and opposite to the first substrate; a common electrode, wherein one of the first substrate and the second substrate is provided with the common electrode; a pixel electrode, wherein the other of the first substrate and the second substrate is provided with the common electrode; and a plurality of liquid crystals, wherein the plurality of liquid crystals are disposed between the first substrate and the second substrate; In the direction from the first substrate to the second substrate, the extension direction of the center line of the long axes of the multiple liquid crystals in at least two of the dimming boxes is different; the light-emitting device has a wide viewing angle mode and a narrow viewing angle mode; in the wide viewing angle mode, the long axes of the multiple liquid crystals are arranged parallel to the plate surface of the first substrate; in the narrow viewing angle mode, there is a voltage difference between the common electrode and the pixel electrode of at least one of the dimming boxes to adjust the long axes of the multiple liquid crystals in at least one of the dimming boxes to be perpendicular to the first substrate and the second substrate.

2. The light emitting device according to claim 1, wherein Three dimming boxes are arranged in parallel and are defined as a first dimming box, a second dimming box and a third dimming box respectively; a line connecting the long axis centers of the multiple liquid crystals in the second dimming box extends in a direction perpendicular to the first substrate, and a line connecting the long axis centers of the multiple liquid crystals in the first dimming box and a line connecting the long axis centers of the multiple liquid crystals in the third dimming box are both bent in a direction away from the second dimming box.

3. The light emitting device according to claim 1, wherein A first polarizer is provided on a side of the first substrate facing away from the second substrate, and a second polarizer is provided on a side of the second substrate facing away from the first substrate. The polarization direction of the first polarizer is perpendicular to the polarization direction of the second polarizer.

4. The light emitting device according to claim 1, wherein A first groove is provided on a side of the first substrate facing the second substrate, and a second groove is provided on a side of the second substrate facing the first substrate. An extension direction of the first groove is perpendicular to an extension direction of the second groove.

5. The light emitting device according to claim 1, wherein A yellow fluorescent film is provided on a side of the second substrate facing the first substrate.

6. The light emitting device according to any one of claims 1 to 5, characterized in that: The light emitting device further includes a base and a protective cover. The light emitting chip is arranged on the base. The protective cover is connected to the base and together with the base, forms a closed installation cavity. The dimming box and the light emitting chip are located in the installation cavity.

7. A backlight module, characterized in that: The invention comprises a back plate and the light emitting device according to any one of claims 1 to 6, wherein a plurality of the light emitting devices are provided and the plurality of the light emitting devices are arranged on the back plate in an array manner.

8. The backlight module according to claim 7, wherein: The backlight module also includes a diffusion plate, which includes a first area and a second area. The first area is arranged opposite to the light-emitting device, and the second area is arranged opposite to the gap between two adjacent light-emitting devices. The density of diffusion particles in the first area is less than the density of diffusion particles in the second area.

9. A display device, characterized in that: The device comprises a display panel and the backlight module according to claim 7 or 8, wherein the display panel is arranged on the light-emitting side of the backlight module.

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