Backlight module

Abstract

The backlight module comprises a back plate, a light guide plate, a first light bar and a second light bar, the light guide plate is arranged on one side of the back plate, and one side face of the light guide plate is a light inlet face; the first light bar is arranged on one side of the back plate, and at least part of the first light bar is located on one side of the light inlet face of the light guide plate. The second light bar is arranged on one side of the back plate, and at least part of the second light bar is located on one side of the light inlet face of the light guide plate; the first light bar comprises a plurality of first light-emitting devices, the second light bar comprises a plurality of second light-emitting devices, and the light-emitting colors of the first light-emitting devices are different from the light-emitting colors of the second light-emitting devices. The display effect can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module. Background Art

[0002] With the rapid development of liquid crystal display (LCD) panels, consumers have higher and higher requirements for the display effects of LCD panels. The backlight module of a traditional LCD panel only provides a single color light source for the module through a light bar, which can no longer meet the increasing display needs of consumers.

[0003] Therefore, it is necessary to propose a new technical solution to solve the above technical problems. Summary of the invention

[0004] The purpose of this application is to provide a backlight module to improve the display effect.

[0005] To solve the above problems, the technical solution of this application is as follows:

[0006] The present application proposes a backlight module, comprising:

[0007] Back panel;

[0008] A light guide plate, disposed on one side of the back plate, wherein one side of the light guide plate is a light-incoming surface;

[0009] a first light bar, disposed on one side of the back plate, at least a portion of the first light bar being located on one side of the light incident surface of the light guide plate; and

[0010] A second light bar, disposed on one side of the back plate, at least a portion of the second light bar being located on one side of the light incident surface of the light guide plate;

[0011] The first light bar includes a plurality of first light emitting devices, the second light bar includes a plurality of second light emitting devices, and the light emitting colors of the first light emitting devices are different from the light emitting colors of the second light emitting devices.

[0012] In one embodiment of the present application, the first light bar further includes a third light emitting device, and the light emitting color of the third light emitting device is different from the light emitting color of the first light emitting device;

[0013] The orthographic projection of the first light emitting device on the back panel and the orthographic projection of the third light emitting device on the back panel are alternately arranged along the length direction of the light incident surface of the light guide plate.

[0014] In one embodiment of the present application, the second light bar further includes a fourth light emitting device, the light emitting color of the fourth light emitting device is different from the light emitting color of the first light emitting device, and the orthographic projection of the fourth light emitting device on the back panel at least partially overlaps with the orthographic projection of the third light emitting device on the back panel;

[0015] The orthographic projection of the second light emitting device on the back plate and the orthographic projection of the fourth light emitting device on the back plate are alternately arranged along the length direction of the light incident surface of the light guide plate.

[0016] In one embodiment of the present application, the light emitting color of the first light emitting device, the light emitting color of the second light emitting device, the light emitting color of the third light emitting device, and the light emitting color of the fourth light emitting device are all different.

[0017] In one embodiment of the present application, among the adjacent plurality of light-emitting devices, at least one of the first light-emitting devices, at least one of the second light-emitting devices, at least one of the third light-emitting devices, and at least one of the fourth light-emitting devices form a backlight unit, and the plurality of backlight units are arranged along the length direction of the light incident surface of the light guide plate;

[0018] The light guide plate comprises a plurality of backlight partitions, the plurality of backlight partitions are arranged along the length direction of the light incident surface of the light guide plate, and one backlight partition corresponds to one backlight unit;

[0019] The first light emitting device is configured to emit white light;

[0020] In a first mode, in any one of the backlight units, the first light emitting device emits light, and the second light emitting device, the third light emitting device, and the fourth light emitting device do not emit light;

[0021] In the second mode, in any one of the backlight units, the first light emitting device, the second light emitting device, the third light emitting device, and the fourth light emitting device all emit light.

[0022] In one embodiment of the present application, a plurality of prism structures are provided on a side of the light guide plate away from the back plate, the prism structures extend in a direction perpendicular to the light incident surface of the light guide plate, and the plurality of prism structures are arranged along the length direction of the light incident surface of the light guide plate;

[0023] A plurality of mesh structures are arranged on one side of the light guide plate close to the back plate;

[0024] Each of the backlight partitions is correspondingly provided with a plurality of the prism structures and a plurality of the mesh dot structures.

[0025] In an embodiment of the present application, the orthographic projection of the second light bar on the back panel overlaps with the orthographic projection of the first light bar on the back panel.

[0026] In one embodiment of the present application, a side of the light guide plate close to the back plate is a first side, a side of the light guide plate away from the back plate is a second side, and the light-incoming side connects the first side and the second side;

[0027] The first light bar comprises a first circuit board, and the first circuit board is arranged at an edge of the first surface;

[0028] The second light bar comprises a second circuit board, and the second circuit board is arranged at an edge of the second surface;

[0029] The orthographic projection of the first part of the first circuit board on the back panel overlaps with the orthographic projection of the edge of the light guide plate on the back panel, the second part of the first circuit board is connected to the first part of the first circuit board, the orthographic projection of the second part of the first circuit board on the back panel is located outside the orthographic projection of the light guide plate on the back panel, and the second part of the first circuit board is provided with a plurality of the first light-emitting devices; the orthographic projection of the first part of the second circuit board on the back panel overlaps with the light guide plate, the second part of the second circuit board is connected to the first part of the second circuit board, the orthographic projection of the second part of the second circuit board on the back panel is located outside the orthographic projection of the light guide plate on the back panel, and the second part of the second circuit board is provided with a plurality of the second light-emitting devices.

[0030] In one embodiment of the present application, the first light emitting device is disposed on a side of the first circuit board close to the second circuit board, and the second light emitting device is disposed on a side of the second circuit board close to the first circuit board.

[0031] In one embodiment of the present application, the orthographic projection of the first light emitting device on the backplane at least partially overlaps with the orthographic projection of the second light emitting device on the backplane;

[0032] In a direction perpendicular to the plane where the back plate is located, the distance between the first light emitting device and the second light emitting device is smaller than the thickness of the light guide plate, and the distance between the first light emitting device and the second light emitting device is greater than 0.

[0033] In the present application, the backlight module includes a first light bar and a second light bar, and the two light bars are respectively provided with a first light-emitting device and a second light-emitting device. Compared with the traditional backlight module, on the one hand, the second light bar newly added by the present application including a plurality of second light-emitting devices can increase the amount of light entering the light-incoming surface of the light guide plate, thereby increasing the amount of light exiting the light-exiting surface of the light guide plate. The light-exiting surface of the light guide plate is the side of the light guide plate away from the back plate, thereby further increasing the brightness of the display screen and improving the display effect. On the other hand, the light-emitting color of the second light-emitting device arranged in the second light bar is different from the light-emitting color of the first light-emitting device. The second light-emitting device can increase the intensity of the light of the corresponding color in the backlight module, thereby further increasing the saturation of the display screen and improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is an exploded view of the display device of the present application;

[0035] Figure 2 is a circuit diagram of an embodiment of a display device of the present application;

[0036] Figure 3 is a schematic diagram of a first embodiment of a backlight module of the present application;

[0037] Figure 4 yes Figure 3 An exploded view of the backlight module;

[0038] Figure 5 is a schematic diagram of a second embodiment of a backlight module of the present application;

[0039] Figure 6 is a schematic diagram of a third embodiment of a backlight module of the present application;

[0040] Figure 7 is a schematic diagram of a fourth embodiment of a backlight module of the present application;

[0041] Figure 8 yes Figure 7 A schematic diagram from another perspective;

[0042] Fig. 9 for Figure 7 Schematic diagram of the circuit. DETAILED DESCRIPTION

[0043] The meanings of the terms used in this specification and claims correspond to the meanings commonly understood by those of ordinary skill in the art to which this application belongs. The terms used in this specification and claims are only for the purpose of facilitating the description and understanding of this application, and are not intended to limit this application to the narrow interpretation of the specific terms used in the specification and claims.

[0044] See also Figure 1, the present application proposes a display device 1000. The display device 1000 can be a mobile phone, a tablet computer, an e-reader, an electronic display screen, a laptop computer, a mobile phone, an augmented reality (AR)\virtual reality (VR) device, a media player, a wearable device, a digital camera, a car navigation system, etc. The display device 1000 includes a display panel 200 and a backlight module 100. Among them, the display panel 200 is a liquid crystal display panel 200 (Liquid Crystal Display, LCD). The light emitting surface of the backlight module 100 is arranged toward the display panel 200.

[0045] In the present application, the backlight module 100 includes a back plate 10, a light guide plate 20 and a first light bar 30. The light guide plate 20 is disposed on one side of the back plate 10, and one side of the light guide plate 20 is a light-incoming surface 22. The first light bar 30 is disposed on one side of the back plate 10, and at least part of the first light bar 30 is located on one side of the light-incoming surface 22 of the light guide plate 20.

[0046] Optional, see Figure 1 The backlight module 100 further includes a reflective sheet 50, a diffuser 60, a lower brightness enhancement sheet 70 and an upper brightness enhancement sheet 80. The reflective sheet 50 is disposed between the back plate 10 and the light guide plate 20. The diffuser 60 is disposed on a side of the light guide plate 20 away from the back plate 10. The lower brightness enhancement sheet 70 is disposed on a side of the diffuser 60 away from the back plate 10. The upper brightness enhancement sheet 80 is disposed on a side of the lower brightness enhancement sheet 70 away from the back plate 10.

[0047] The reflective sheet 50, the lower brightness enhancement sheet 70 and the upper brightness enhancement sheet 80 can increase the light output of the backlight module 100, thereby increasing the brightness of the display panel 200 and improving the display effect. The diffuser 60 can make the light output from the light guide plate 20 more uniform, further improving the display effect.

[0048] Optionally, the backlight module 100 further includes a second light bar 40, which is disposed on one side of the back plate 10, and at least a portion of the second light bar 40 is located on one side of the light-incoming surface 22 of the light guide plate 20. The first light bar 30 includes a plurality of first light-emitting devices 31, and the second light bar 40 includes a plurality of second light-emitting devices 41, and the light-emitting colors of the first light-emitting devices 31 are different from the light-emitting colors of the second light-emitting devices 41.

[0049] In this embodiment, the backlight module 100 includes a first light bar 30 and a second light bar 40, which are respectively provided with a first light emitting device 31 and a second light emitting device 41. Compared with the conventional backlight module 100, on the one hand, the second light bar 40 newly added in this application including a plurality of second light emitting devices 41 can increase the amount of light entering the light-incoming surface 22 of the light guide plate 20, thereby increasing the amount of light exiting the light-exiting surface of the light guide plate 20. The light-exiting surface of the light guide plate 20 is the side of the light guide plate 20 away from the back plate 10, thereby further increasing the brightness of the display screen and improving the display effect. On the other hand, the light color of the second light emitting device 41 provided in the second light bar 40 is different from the light color of the first light emitting device 31. The second light emitting device 41 can increase the intensity of the light of the corresponding color in the backlight module 100, thereby further increasing the saturation of the display screen and improving the display effect.

[0050] Optionally, a plurality of first light emitting devices 31 are connected in series, and a plurality of second light emitting devices 41 are connected in series.

[0051] Optional, see Figure 2 The display device 1000 further includes a light-emitting driving chip 300, a first current control chip 400, and a second current control chip 500. The first current control chip 400 is electrically connected to the light-emitting driving chip 300, and the first current control chip 400 is electrically connected to the plurality of first light-emitting devices 31. The second current control chip 500 is electrically connected to the light-emitting driving chip 300, and the second current control chip 500 is electrically connected to the plurality of second light-emitting devices 41.

[0052] In this embodiment, the light-emitting driver chip 300 (LED Driver IC) can control the light emission of multiple first light-emitting devices 31 at the same time, and control the brightness of the multiple first light-emitting devices 31 through the first current control chip 400. The light-emitting driver chip 300 can also control the light emission of multiple second light-emitting devices 41 at the same time, and control the brightness of the multiple second light-emitting devices 41 through the second current control chip 500. In the low grayscale display screen, the light-emitting driver chip 300 can turn off the multiple second light-emitting devices 41, and reduce the brightness of the multiple first light-emitting devices 31 through the first current control chip 400, thereby realizing the display of the low grayscale display screen. In the high grayscale display screen, the light-emitting driver chip 300 can turn on the multiple first light-emitting devices 31 and the second light-emitting devices 41 at the same time, and increase the brightness of the multiple first light-emitting devices 31 and the brightness of the second light-emitting devices 41 through the first current control chip 400 and the second current control chip 500, thereby improving the contrast of the display device 1000 and improving the display effect.

[0053] Optionally, the first light emitting device 31 and the second light emitting device 41 can be a light emitting diode (Light Emitting Diode, LED), a sub-millimeter light emitting diode (Mini Light Emitting Diode, Mini LED), or a micro light emitting diode (Micro Light Emitting Diode, Micro LED). Among them, the size of the micro light emitting diode is small, the size of the sub-millimeter light emitting diode is moderate, and the size of the light emitting diode is large. As the size of the first light emitting device 31 and the second light emitting device 41 decreases, the number of the first light emitting device 31 and the second light emitting device 41 that can be set in a unit space increases, thereby increasing the light output of the backlight module 100, increasing the brightness of the display screen, and improving the display effect.

[0054] Optionally, the first light emitting device 31 is configured to emit white light, and the second light emitting device 41 is configured to emit light of one color among red light, green light and blue light. When the first light emitting device 31 and the second light emitting device 41 are micro light emitting diodes, since the red light emitting efficiency of the micro light emitting diodes is low, in order to improve the overall saturation of the picture, the second light emitting device 41 can be configured to emit red light, thereby improving the problem of low red light emitting efficiency of the micro light emitting diodes and improving the display effect.

[0055] It should be understood that the portion of white light with a predetermined wavelength is lower in brightness than the rest of the white light, and visible light of different colors has different wavelengths. By adding a second light-emitting device 41 on the basis of the first light-emitting device 31, the intensity of light of a predetermined wavelength can be increased. The above-mentioned predetermined wavelength can be set according to demand. For example, the predetermined wavelength can be a wavelength corresponding to a color with relatively low luminous intensity within the visible light band emitted by the backlight module 100, thereby increasing the saturation of the picture and thus improving the display effect. The predetermined wavelength can also be light of a color that is specially set according to the display requirements of the picture, and the luminous color or wavelength range of the second light-emitting device 41 is not limited here.

[0056] Optional, see Figure 3 , the orthographic projection of the second light bar 40 on the back plate 10 overlaps with the orthographic projection of the first light bar 30 on the back plate 10. In this embodiment, by overlapping the first light bar 30 and the second light bar 40, the number of the first light emitting devices 31 and the second light emitting devices 41 in the unit space is further increased, thereby increasing the light output intensity of the backlight module 100, increasing the brightness of the display device 1000, and thus improving the contrast and display effect.

[0057] Optionally, the side of the light guide plate 20 close to the back plate 10 is the first side, the side of the light guide plate 20 away from the back plate 10 is the second side, and the light-incoming surface 22 connects the first side and the second side. The first light bar 30 includes a first circuit board 33, and the first circuit board 33 is arranged at the edge of the first side. The second light bar 40 includes a second circuit board 43. The second circuit board 43 is arranged at the edge of the second side.

[0058] The orthographic projection of the first part of the first circuit board 33 on the back plate 10 overlaps with the orthographic projection of the edge of the light guide plate 20 on the back plate 10. The second part of the first circuit board 33 is connected to the first part of the first circuit board 33. The orthographic projection of the second part of the first circuit board 33 on the back plate 10 is located outside the orthographic projection of the light guide plate 20 on the back plate 10. The second part of the first circuit board 33 is provided with a plurality of first light-emitting devices 31.

[0059] The orthographic projection of the first part of the second circuit board 43 on the back plate 10 overlaps with the light guide plate 20. The second part of the second circuit board 43 is connected to the first part of the second circuit board 43. The orthographic projection of the second part of the second circuit board 43 on the back plate 10 is located outside the orthographic projection of the light guide plate 20 on the back plate 10. The second part of the second circuit board 43 is provided with a plurality of second light-emitting devices 41.

[0060] In the present embodiment, the first circuit board 33 and the second circuit board 43 are flexible printed circuits (Flexible Printed Circuit, FPC). In the backlight module 100, the first part of the first circuit board 33 can be fixed to the edge of the light guide plate 20 close to the back plate 10 by adhesive, and the first part of the second circuit board 43 can be fixed to the edge of the light guide plate 20 away from the back plate 10 by adhesive. The adhesive can be a double-sided adhesive or an optically clear adhesive (OCA). The design of fixing the first light-emitting device 31 and the second light-emitting device 41 by the first circuit board 33 and the second circuit board 43 maximizes the use of the space on the side of the light-incoming surface 22 of the light guide plate 20, so that the space volume that can only be set with one light-emitting device can realize the vertical setting of two light-emitting devices, thereby increasing the number of light-emitting devices in the unit space, thereby increasing the light output of the backlight module 100, and increasing the brightness of the display device 1000, thereby improving the display effect.

[0061] Optional, see Figure 4 The first light emitting device 31 is disposed on a side of the first circuit board 33 close to the second circuit board 43 , and the second light emitting device 41 is disposed on a side of the second circuit board 43 close to the first circuit board 33 .

[0062] In this embodiment, since the first circuit board 33 is arranged at the edge of the first surface of the light guide plate 20, and the second circuit board 43 is arranged at the edge of the second surface of the light guide plate 20, by arranging a plurality of first light-emitting devices 31 and a plurality of second light-emitting devices between the first circuit board 33 and the second circuit board 43, the light emitted by the first light-emitting devices 31 and the second light-emitting devices 41 enters the light guide plate 20 through the light input surface 22 of the light guide plate 20 as much as possible, thereby improving the light output of the backlight module 100.

[0063] Optionally, a reflective coating is provided on one side of the first circuit board 33 facing the second circuit board 43, and a reflective coating is provided on one side of the second circuit board 43 facing the first circuit board 33. The provision of the reflective coating can reuse the light emitted by the first light-emitting device 31 and the second light-emitting device 41 parallel to the light-incoming surface 22 through reflection, so that the light enters the light-incoming surface 22, further increasing the light output of the backlight module 100 and improving the display effect.

[0064] Optionally, the backlight module 100 further includes a reflective film layer. The reflective film layer connects the side of the first circuit board 33 away from the light-entering surface 22 of the light guide plate 20 and the side of the second circuit board 43 away from the light-entering surface 22 of the light guide plate 20, and the reflective film layer is also located on the side of the first light-emitting device 31 and the second light-emitting device 41 away from the light-entering surface 22 of the light guide plate 20. In this embodiment, the reflective film layer can reflect and reuse the light emitted by the first light-emitting device 31 and the second light-emitting device 41 in a direction away from the light guide plate 20, so that the light enters the light-entering surface 22, further increasing the light output of the backlight module 100 and improving the display effect.

[0065] In the first embodiment of the present application:

[0066] Optional, see Figure 3 , the orthographic projection of the first light emitting device 31 on the back plate 10 at least partially overlaps with the orthographic projection of the second light emitting device 41 on the back plate 10 .

[0067] In the first embodiment of the present application, one first light-emitting device 31 may correspond to one second light-emitting device 41, and one first light-emitting device 31 may correspond to two or more light-emitting devices. In some other embodiments, one second light-emitting device 41 may also correspond to at least one first light-emitting device 31. In this embodiment, the correspondence between the first light-emitting device 31 and the second light-emitting device 41 means that the orthographic projection of the first light-emitting device 31 on the back plate 10 overlaps with the orthographic projection of the second light-emitting device 41 on the back plate 10. This embodiment maximizes the use of the space on the side of the light-incoming surface 22 of the light guide plate 20, thereby increasing the light output of the backlight module 100 and the brightness of the display device 1000, thereby improving the display effect.

[0068] Optionally, in a direction perpendicular to the plane of the back plate 10 , a distance L1 between the first light emitting device 31 and the second light emitting device 41 is smaller than a thickness L2 of the light guide plate 20 , and a distance L1 between the first light emitting device 31 and the second light emitting device 41 is greater than 0.

[0069] In the first embodiment of the present application, the spacing L1 between the first light emitting device 31 and the second light emitting device 41 is greater than 0, which can prevent the first light emitting device 31 and the second light emitting device 41 from transferring heat to each other during the light emitting period, resulting in excessive heat accumulation inside the first light emitting device 31 and the second light emitting device 41, causing the first light emitting device 31 or the second light emitting device 41 to overheat and burn. The spacing L1 of the first light emitting device 31 is less than the thickness L2 of the light guide plate 20, which can prevent the thickness of either the first light emitting device 31 or the second light emitting device 41 from being too small, resulting in uneven light distribution on the light inlet surface 22 of the light guide plate 20, affecting the display effect.

[0070] In the second embodiment of the present application:

[0071] In order to avoid redundancy, the second embodiment of the present application will describe parts different from the first embodiment of the present application.

[0072] The second embodiment of the present application is different from the first embodiment of the present application in that:

[0073] Optional, see Figure 5 The orthographic projection of the first light-emitting device 31 on the back panel 10 does not overlap with the orthographic projection of the second light-emitting device 41 on the back panel 10 , and the orthographic projection of the first light-emitting device 31 on the back panel 10 and the orthographic projection of the second light-emitting device 41 on the back panel 10 are alternately arranged along the length direction D1 of the light incident surface 22 of the light guide plate 20 .

[0074] In the present application, the length direction D1 of the light incident surface 22 of the light guide plate 20 is: a direction perpendicular to the thickness direction of the light guide plate 20 in the plane where the light incident surface 22 of the light guide plate 20 is located.

[0075] In the second embodiment of the present application, the orthographic projection of the first light emitting device 31 on the back plate 10 does not overlap with the orthographic projection of the second light emitting device 41 on the back plate 10, thereby relatively increasing the spacing L1 between the adjacent first light emitting devices 31 and the second light emitting device 41, avoiding the first light emitting device 31 and the second light emitting device 41 from transferring heat to each other during the light emitting period, resulting in excessive heat accumulation inside the first light emitting device 31 and the second light emitting device 41, causing the first light emitting device 31 or the second light emitting device 41 to overheat and burn. The stability of the backlight module 100 is improved, and the service life of the backlight module 100 is extended. In the second embodiment of the present application, the orthographic projection of the first light emitting device 31 on the back plate 10 and the orthographic projection of the second light emitting device 41 on the back plate 10 are alternately arranged along the length direction D1 of the light inlet surface 22 of the light guide plate 20, while improving the heat dissipation performance of the backlight module 100, thereby achieving effective utilization of the unit space volume of the light inlet surface 22 of the light guide plate 20, improving the light output brightness of the backlight module 100, and thus improving the display effect.

[0076] Optionally, the spacing L1 between the first light emitting device 31 and the second light emitting device 41 in the direction perpendicular to the thickness of the back plate 10 is smaller than the spacing between two adjacent first light emitting devices 31, and the spacing between the first light emitting device 31 and the second light emitting device 41 in the direction perpendicular to the thickness of the back plate 10 is smaller than the spacing between two adjacent second light emitting devices 41. This further improves the heat dissipation performance of the backlight module 100 and improves the display effect.

[0077] In the third embodiment of the present application:

[0078] In order to avoid redundancy, the third embodiment of the present application will describe parts different from the first embodiment of the present application.

[0079] The third embodiment of the present application is different from the first embodiment of the present application in that:

[0080] Optional, see Figure 6 The first light bar 30 further includes a third light emitting device 32 , and the orthographic projections of the first light emitting device 31 on the back plate 10 and the orthographic projections of the third light emitting device 32 on the back plate 10 are alternately arranged along the length direction D1 of the light incident surface 22 of the light guide plate 20 .

[0081] Compared with the first embodiment of the present application, the third embodiment arranges a third light-emitting device 32 between two adjacent first light-emitting devices 31, further increasing the number of light-emitting devices on the light-incoming surface 22 of the light guide plate 20, thereby increasing the brightness of the display panel 200 and improving the display effect.

[0082] Optionally, the light emitting color of the third light emitting device 32 is different from the light emitting color of the first light emitting device 31 .

[0083] The third light emitting device 32 is configured to emit light of one color among red light, green light and blue light.

[0084] In the third embodiment, the light emitting color of the third light emitting device 32 is set to be different from the light emitting color of the first light emitting device 31. Since the first light emitting device 31 is configured to emit white light, the third light emitting device 32 can increase the intensity of the light of the corresponding color in the backlight module 100, thereby further improving the saturation of the displayed image and improving the display effect.

[0085] Optionally, the luminous colors of the first light emitting device 31, the luminous colors of the second light emitting device 41, and the luminous colors of the third light emitting device 32 are all different. In this embodiment, the provision of the third light emitting device 32 can further improve the saturation of the display image, thereby improving the display effect.

[0086] Optionally, the display device 1000 further includes a third current control chip 600. The third current control chip 600 is electrically connected to the light-emitting driving chip 300. The third current control chip 600 is electrically connected to a plurality of third light-emitting devices 32. The light-emitting driving chip 300 can simultaneously control the plurality of third light-emitting devices 32 to emit light, and control the brightness of the plurality of third light-emitting devices 32 through the third current control chip 600. The brightness and contrast of the display screen are improved, thereby improving the display effect.

[0087] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits red light, and the third light emitting device 32 emits green light.

[0088] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits red light, and the third light emitting device 32 emits blue light.

[0089] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits green light, and the third light emitting device 32 emits blue light.

[0090] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits green light, and the third light emitting device 32 emits red light.

[0091] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits blue light, and the third light emitting device 32 emits red light.

[0092] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits blue light, and the third light emitting device 32 emits green light.

[0093] In the fourth embodiment of the present application:

[0094] In order to avoid redundancy, the fourth embodiment of the present application will describe the parts different from the third embodiment of the present application.

[0095] The fourth embodiment of the present application is different from the third embodiment of the present application in that:

[0096] Optional, see Figure 7 The second light bar 40 further includes a fourth light emitting device 42, and the orthographic projection of the fourth light emitting device 42 on the back plate 10 at least partially overlaps with the orthographic projection of the third light emitting device 32 on the back plate 10. The orthographic projection of the second light emitting device 41 on the back plate 10 and the orthographic projection of the fourth light emitting device 42 on the back plate 10 are alternately arranged along the length direction D1 of the light incident surface 22 of the light guide plate 20.

[0097] Compared with the third embodiment of the present application, the fourth embodiment arranges a fourth light-emitting device 42 between two adjacent second light-emitting devices 41, further increasing the number of light-emitting devices on the light-incoming surface 22 of the light guide plate 20, thereby increasing the brightness of the display panel 200 and improving the display effect.

[0098] Optionally, the light emitting color of the fourth light emitting device 42 is different from the light emitting color of the first light emitting device 31 .

[0099] The third light emitting device 32 is configured to emit light of one color among red light, green light and blue light.

[0100] In the fourth embodiment, the light emitting color of the fourth light emitting device 42 is arranged to be different from the light emitting color of the first light emitting device 31. Since the first light emitting device 31 is configured to emit white light, the fourth light emitting device 42 can increase the intensity of the light of the corresponding color in the backlight module 100, thereby further improving the saturation of the displayed image and improving the display effect.

[0101] Optionally, the light emitting colors of the first light emitting device 31, the second light emitting device 41, the third light emitting device 32, and the fourth light emitting device 42 are all different. In this embodiment, the provision of the fourth light emitting device 42 can further improve the saturation of the display image, thereby improving the display effect.

[0102] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits red light, the third light emitting device 32 emits green light, and the fourth light emitting device 42 emits blue light.

[0103] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits red light, the third light emitting device 32 emits blue light, and the fourth light emitting device 42 emits green light.

[0104] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits green light, the third light emitting device 32 emits blue light, and the fourth light emitting device 42 emits red light.

[0105] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits green light, the third light emitting device 32 emits red light, and the fourth light emitting device 42 emits blue light.

[0106] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits blue light, the third light emitting device 32 emits red light, and the fourth light emitting device 42 emits green light.

[0107] Optionally, the first light emitting device 31 emits white light, the second light emitting device 41 emits blue light, the third light emitting device 32 emits green light, and the fourth light emitting device 42 emits red light.

[0108] Optional, see Figure 8 Among the adjacent multiple light-emitting devices, at least one first light-emitting device 31, at least one second light-emitting device 41, at least one third light-emitting device 32, and at least one fourth light-emitting device 42 form a backlight unit 90, and the multiple backlight units 90 are arranged along the length direction D1 of the light incident surface 22 of the light guide plate 20.

[0109] like Figure 8 As shown, six adjacent light emitting devices form a backlight unit 90 , and each backlight unit 90 includes at least one first light emitting device 31 , at least one second light emitting device 41 , at least one third light emitting device 32 and at least one fourth light emitting device 42 .

[0110] Optionally, the light guide plate 20 includes a plurality of backlight partitions 23 , and the plurality of backlight partitions 23 are arranged along the length direction D1 of the light incident surface 22 of the light guide plate 20 , and one backlight partition 23 corresponds to one backlight unit 90 .

[0111] Optionally, the first light emitting device 31 is configured to emit white light.

[0112] In the first mode:

[0113] In any one of the backlight units 90 , the first light emitting device 31 emits light, while the second light emitting device 41 , the third light emitting device 32 , and the fourth light emitting device 42 do not emit light.

[0114] It should be understood that the first mode is a normal working mode. In the normal working mode, in order to save energy, only the first light emitting device 31 emits white light, and the second light emitting device 41, the third light emitting device 32 and the fourth light emitting device 42 do not emit light.

[0115] In the second mode:

[0116] In any one of the backlight units 90 , the first light emitting device 31 , the second light emitting device 41 , the third light emitting device 32 , and the fourth light emitting device 42 all emit light.

[0117] It should be understood that the second mode is an enhanced display mode. In the enhanced display mode, on the one hand, the luminous intensity of each backlight unit 90 is increased, which can increase the light output of the backlight module 100, thereby improving the display effect. On the other hand, the brightness of the red light, the brightness of the green light, and the brightness of the blue light in each backlight unit 90 are all increased, thereby improving the saturation of the display image and thus improving the display effect.

[0118] Optionally, the display device 1000 includes a light-emitting driver chip 300 and a plurality of backlight current control chips 700. Each backlight current control chip 700 is electrically connected to the light-emitting driver chip 300. Each backlight current control chip 700 controls the current intensity of a plurality of light-emitting devices in a backlight partition 23, and therefore, each backlight current control chip 700 is electrically connected to a plurality of light-emitting devices in the same backlight partition 23.

[0119] Furthermore, in the second mode, multiple backlight current control chips 700 can be used to jointly adjust the brightness of light-emitting devices in multiple backlight partitions 23, so as to achieve dynamic color change display of the backlight partitions 23, realize rainbow light display or dynamic rainbow display, and improve the display effect.

[0120] See also Fig. 9 In the first mode, the light-emitting driving chip 300 only drives the first light-emitting device 31 to turn on. In the second mode, the light-emitting driving chip 300 drives multiple backlight units 90 to turn on, and can control the brightness of each backlight partition 23 through multiple backlight current control chips 700 to achieve dynamic display and improve display effect.

[0121] Optionally, a plurality of prism structures 21 are provided on a side of the light guide plate 20 away from the back plate 10, the prism structures 21 extend in a direction perpendicular to the light-incoming surface 22 of the light guide plate 20, and the plurality of prism structures 21 are arranged along a length direction D1 of the light-incoming surface 22 of the light guide plate 20. A plurality of mesh structures are provided on a side of the light guide plate 20 close to the back plate 10. Each backlight partition 23 is correspondingly provided with a plurality of prism structures 21 and a plurality of mesh structures.

[0122] In the present embodiment, by arranging a plurality of prism structures 21 on the light emitting surface of the light guide plate 20 and arranging a dot structure on the side of the light guide plate 20 close to the back plate 10, it is possible to achieve convergence of light emitted by each backlight unit 90 within the corresponding backlight partition 23, so that the light emitted by each backlight unit 90 propagates in a convergent manner within the corresponding backlight partition 23, thereby reducing the amount of light emitted by the backlight unit 90 that propagates to the adjacent backlight partition 23, avoiding crosstalk between adjacent backlight units 90, and improving the image restoration degree of the displayed image, thereby improving the display effect.

[0123] It can be understood that, in some other embodiments, the light-emitting driver chip 300, the first current control chip 400, the second current control chip 500, the third current control chip 600, and the backlight current control chip 700 mentioned above can also be integrated in the backlight module 100 as a part of the backlight module 100. That is, the backlight module 100 includes the light-emitting driver chip 300, the first current control chip 400, the second current control chip 500, the third current control chip 600, and the backlight current control chip 700 mentioned above.

[0124] The above is a detailed description of the specific implementation of the present application. The above implementation disclosed in the present application is only the preferred implementation of the present application. For ordinary technicians in this field, many modifications and improvements can be made without departing from the concept of the present application. These modifications and improvements all fall within the scope of protection defined by the claims of the present application.

Claims

1. A backlight module, characterized in that: include: Back panel; A light guide plate, disposed on one side of the back plate, wherein one side of the light guide plate is a light-incoming surface; A first light bar, disposed on one side of the back plate, at least a portion of the first light bar being located on one side of the light incident surface of the light guide plate; as well as A second light bar, disposed on one side of the back plate, at least a portion of the second light bar being located on one side of the light incident surface of the light guide plate; The first light bar includes a plurality of first light emitting devices, the second light bar includes a plurality of second light emitting devices, and the light emitting colors of the first light emitting devices are different from the light emitting colors of the second light emitting devices.

2. The backlight module according to claim 1, characterized in that: The first light bar further includes a third light emitting device, the light emitting color of the third light emitting device is different from the light emitting color of the first light emitting device; The orthographic projection of the first light emitting device on the back panel and the orthographic projection of the third light emitting device on the back panel are alternately arranged along the length direction of the light incident surface of the light guide plate.

3. The backlight module according to claim 2, characterized in that: The second light bar further includes a fourth light emitting device, the light color of the fourth light emitting device is different from the light color of the first light emitting device, and the orthographic projection of the fourth light emitting device on the back panel at least partially overlaps with the orthographic projection of the third light emitting device on the back panel; The orthographic projection of the second light emitting device on the back plate and the orthographic projection of the fourth light emitting device on the back plate are alternately arranged along the length direction of the light incident surface of the light guide plate.

4. The backlight module according to claim 3, characterized in that: The light emitting color of the first light emitting device, the light emitting color of the second light emitting device, the light emitting color of the third light emitting device, and the light emitting color of the fourth light emitting device are all different.

5. The backlight module according to claim 4, characterized in that: Among the adjacent plurality of light-emitting devices, at least one of the first light-emitting device, at least one of the second light-emitting device, at least one of the third light-emitting device, and at least one of the fourth light-emitting device form a backlight unit, and the plurality of backlight units are arranged along the length direction of the light incident surface of the light guide plate; The light guide plate comprises a plurality of backlight partitions, the plurality of backlight partitions are arranged along the length direction of the light incident surface of the light guide plate, and one backlight partition corresponds to one backlight unit; The first light emitting device is configured to emit white light; In a first mode, in any one of the backlight units, the first light emitting device emits light, and the second light emitting device, the third light emitting device, and the fourth light emitting device do not emit light; In the second mode, in any one of the backlight units, the first light emitting device, the second light emitting device, the third light emitting device, and the fourth light emitting device all emit light.

6. The backlight module according to claim 5, characterized in that: A plurality of prism structures are disposed on a side of the light guide plate away from the back plate, the prism structures extend in a direction perpendicular to the light incident surface of the light guide plate, and the plurality of prism structures are arranged along the length direction of the light incident surface of the light guide plate; A plurality of mesh structures are arranged on one side of the light guide plate close to the back plate; Each of the backlight partitions is correspondingly provided with a plurality of the prism structures and a plurality of the mesh dot structures.

7. The backlight module according to any one of claims 1 to 6, characterized in that: The orthographic projection of the second light bar on the back panel overlaps with the orthographic projection of the first light bar on the back panel.

8. The backlight module according to claim 7, characterized in that: A side of the light guide plate close to the back plate is a first side, a side of the light guide plate away from the back plate is a second side, and the light-incoming side connects the first side and the second side; The first light bar comprises a first circuit board, and the first circuit board is arranged at an edge of the first surface; The second light bar comprises a second circuit board, and the second circuit board is arranged at an edge of the second surface; The orthographic projection of the first part of the first circuit board on the back panel overlaps with the orthographic projection of the edge of the light guide plate on the back panel, the second part of the first circuit board is connected to the first part of the first circuit board, the orthographic projection of the second part of the first circuit board on the back panel is located outside the orthographic projection of the light guide plate on the back panel, and the second part of the first circuit board is provided with a plurality of the first light-emitting devices; The orthographic projection of the first part of the second circuit board on the back panel overlaps with the light guide plate, the second part of the second circuit board is connected to the first part of the second circuit board, the orthographic projection of the second part of the second circuit board on the back panel is located outside the orthographic projection of the light guide plate on the back panel, and the second part of the second circuit board is provided with a plurality of the second light-emitting devices.

9. The backlight module according to claim 8, characterized in that: The first light emitting device is arranged on a side of the first circuit board close to the second circuit board, and the second light emitting device is arranged on a side of the second circuit board close to the first circuit board.

10. The backlight module according to claim 8, wherein: The orthographic projection of the first light emitting device on the back panel at least partially overlaps with the orthographic projection of the second light emitting device on the back panel; In a direction perpendicular to the plane where the back plate is located, the distance between the first light emitting device and the second light emitting device is smaller than the thickness of the light guide plate, and the distance between the first light emitting device and the second light emitting device is greater than 0.

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