Backlight module and display device

Abstract

The application provides a backlight module and a display device; the backlight module comprises a back frame, a light guide plate, a first lamp strip and a second lamp strip; the light guide plate comprises a first light guide part and a second light guide part which are integrally arranged; the first lamp strip corresponds to a first light entrance surface of the first light guide part; the second lamp strip corresponds to a second light entrance surface of the second light guide part; a surface of the first light guide part away from the back frame and a surface of the second light guide part away from the back frame are located on the same plane; and the thickness of the first light guide part is greater than the thickness of the second light guide part; the application forms the first light guide part and the second light guide part with different thicknesses by integrally arranging the light guide plate; independent control of the first lamp strip and the second lamp strip can make the light guide plate form two independent light guide partitions; the backlight module realizes partition light emission; and the integrally arranged first light guide part and second light guide part eliminate the non-emission area between the partition light emission, thereby solving the technical problem that the existing partition display display device has a non-display area when full brightness.

Description

[0001] This application claims priority to Chinese patent application No. 202620703659.1, filed on May 18, 2026, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and in particular to a backlight module and display device. Background Technology

[0003] With the advancement of display technology, the applications of display devices are becoming increasingly diversified. For example, display devices with multiple display areas are gradually being used in the automotive field, where multiple display areas can be used independently as functional screens for the central control, passenger side, instrument panel, etc.

[0004] Current vehicle displays are all single-screen, single-backlight controlled displays, which cannot achieve zoned display. If zoned display is required, multiple displays and multiple backlights are needed for control. However, when multiple displays are lit up at the same time, the area between two adjacent display areas is usually a non-display area, which is a technical problem that makes it impossible for the display device to be fully lit. Summary of the Invention

[0005] This application provides a backlight module and display device to solve the technical problem that non-display areas appear in existing zoned display devices when fully lit.

[0006] This application provides a backlight module, which includes: Back frame; A light guide plate is located within the back frame, and the light guide plate includes an integrally formed first light guide portion and a second light guide portion; A first light strip and a second light strip, wherein the first light strip corresponds to the first light-incident surface of the first light guide portion, and the second light strip corresponds to the second light-incident surface of the second light guide portion; The surfaces of the first light guide portion and the second light guide portion that are away from the back frame are located on the same plane, and the thickness of the first light guide portion is greater than the thickness of the second light guide portion.

[0007] This application also proposes a display device, the display device comprising: The aforementioned backlight module; The display panel includes a first sub-area and a second sub-area, wherein the first sub-area corresponds to the first light guide portion and the second sub-area corresponds to the second light guide portion.

[0008] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0011] Figure 1 This is a first structural diagram of the display device of this application.

[0012] Figure 2 This is a second structural diagram of the display device of this application.

[0013] Figure 3 for Figure 2 Cross-sectional view of the mid-section MM.

[0014] Figure 4 This is a film layer diagram of the display panel of this application.

[0015] Figure 5 for Figure 3 A magnified view of region N.

[0016] Figure 6 This is a schematic diagram of the first and second light strips of this application.

[0017] Figure 7 This is a schematic diagram of the light guide plate of this application.

[0018] Figure 8 This is a schematic diagram of the light guide plate, the first light strip, and the second light strip of this application.

[0019] Figure 9 This is a structural diagram of one type of light guide plate in this application.

[0020] Figure 10 This is another structural diagram of the light guide plate of this application.

[0021] Figure 11 This is a structural diagram of the light guide plate and back frame assembly of this application.

[0022] Figure 12 This is a third structural diagram of the display device of this application.

[0023] Figure 13 for Figure 12 Cross-sectional view of the mid-section MM.

[0024] Figure 14 for Figure 13 A magnified view of region N in the middle.

[0025] Figure 15 for Figure 12 A schematic diagram of the central light guide plate.

[0026] Figure 16 for Figure 12 A first schematic diagram of the central light guide plate, the first light strip, the second light strip, the third light strip, and the fourth light strip.

[0027] Figure 17 for Figure 12 A second schematic diagram of the central light guide plate, the first light strip, the second light strip, the third light strip, and the fourth light strip.

[0028] Figure label: Display device 100; backlight module 20; display panel 10; back frame 230; light guide plate 210; first light strip 221; second light strip 222; first light guide part 211; second light guide part 212; middle frame 240; reflector 260; optical adjustment layer 270; bottom plate 231; side plate 232; first support part 231a; second support part 231b; diffusion layer 280; First sub-region AA1; Second sub-region AA2; First light-emitting area 210a; Second light-emitting area 210b; First sub-light guide surface 211b1; Second sub-light guide surface 211b2; Display area AA; Non-display area NA; Bonding terminal 400; First substrate 110; Second substrate 120; Liquid crystal layer LC; First substrate 111; array layer 114; light-shielding layer LS; buffer layer 114a; active layer 114b; gate insulating layer 114c; gate layer 114d; inter-insulating layer 114e; source-drain layer 114f; planarization layer 114g; common electrode layer 114h; passivation layer 114i; pixel electrode layer 114j; Second substrate 121; color filter layer 122; Second polarizer POL2; First polarizer POL1; Cover plate CG; First circuit board 221a; First light-emitting device LD1; Second circuit board 222a; Second light-emitting device LD2; First mating surface 211a; First light guiding surface 211b; First bottom reflective surface 211c; First side reflective surface 211d; Second side reflective surface 211e; Second mating surface 211f; Third mating surface 212a; Second light guiding surface 212b; Second bottom reflective surface 212c; Third side reflective surface 212d; Fourth mating surface 212f; Reflecting surface 211d1; First sub-reflecting surface 211d2; Second sub-reflecting surface 211d3; Third sub-reflecting surface 211d4; First light adjustment surface 211c1; Second light adjustment surface 212c1 First direction X; First centerline L1; Second centerline L2; Optical adjustment unit 300; optical adjustment surface 310; first sub-adjustment surface 311; second sub-adjustment surface 312; Microstructure pattern (MP); dimming component (LCS); Third light strip 223; Fourth light strip 224; Third center line L3; Fourth center line L4; Third circuit board 223a; Third light-emitting device LD3; Fourth circuit board 224a; Fourth light-emitting device LD4; Fifth mating surface 411a; Third smooth surface 411b; Third bottom reflective surface 411c; Third side reflective surface 411d; Sixth mating surface 411f; Seventh mating surface 412a; Fourth smooth surface 412b; Fourth bottom reflective surface 412c; Fourth side reflective surface 412d; Eighth mating surface 412f; First subsection 210c; Second subsection 210d. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0030] Please see Figures 1 to 8 This application proposes a display device 100, which includes a backlight module 20 and a display panel 10 located on the light-emitting side of the backlight module 20. The backlight module 20 includes a back frame 230 and a light guide plate 210, a first light strip 221 and a second light strip 222 located within the back frame 230. The light guide plate 210 includes an integrally formed first light guide portion 211 and a second light guide portion 212. The first light strip 221 corresponds to the first light-incident surface of the first light guide portion 211, and the second light strip 222 corresponds to the second light-incident surface of the second light guide portion 212.

[0031] In this embodiment, the surface of the first light guide 211 away from the back frame 230 and the surface of the second light guide 212 away from the back frame 230 are located on the same plane, and the thickness of the first light guide 211 is greater than the thickness of the second light guide 212.

[0032] This application enables the light guide plate 210 to form a first light guide portion 211 and a second light guide portion 212 with different thicknesses by forming an integrally set light guide plate 210. The independent control of the first light strip 221 and the second light strip 222 can enable the light guide plate 210 to form two independent light guide zones, thereby realizing the zoned light emission of the backlight module 20. The integrally set first light guide portion 211 and the second light guide portion 212 eliminate the non-light emission area between the zoned light emission areas, thus solving the technical problem that the existing zoned display display device 100 has a non-display area when fully lit.

[0033] In this embodiment, the display panel 10 includes a first sub-area AA1 and a second sub-area AA2, the first sub-area AA1 corresponds to the first light guide portion 211, and the second sub-area AA2 corresponds to the second light guide portion 212.

[0034] In one embodiment, when the first sub-area AA1 is configured to display and the second sub-area AA2 is configured to be off, the first light strip 221 illuminates and the second light strip 222 does not illuminate; when the second sub-area AA2 is configured to display and the first sub-area AA1 is configured to be off, the first light strip 221 does not illuminate and the second light strip 222 illuminates.

[0035] In one embodiment, when the first sub-area AA1 is configured for display and the second sub-area AA2 is configured for screen off, the first light bar 221 emits light and the second light bar 222 emits light. The liquid crystal molecules in the second sub-area AA2 do not deflect, so that light cannot pass through the liquid crystal layer in the second sub-area AA2. When the second sub-area AA2 is configured for display and the first sub-area AA1 is configured for screen off, the first light bar 221 emits light and the second light bar 222 emits light. The liquid crystal molecules in the first sub-area AA1 do not deflect, so that light cannot pass through the liquid crystal layer in the first sub-area AA1.

[0036] It should be noted that the number of light guide portions of the light guide plate 210 in this application may include three or more. Each light guide plate 210 has a corresponding light source. That is, when the display device 100 divides the display area, the number of partitions can be the same as the number of light guide portions of the light guide plate 210. The following embodiment uses two light guide portions as an example to illustrate this application.

[0037] The technical solution of this application will now be described in conjunction with specific embodiments.

[0038] Please see Figure 1The display device includes a display area AA and a non-display area NA adjacent to the display area AA. The display area AA contains multiple rows of sub-pixels. Optionally, the non-display area NA surrounds the display area AA, so that the display area AA is surrounded by the non-display area NA. The display area AA is the area within the display panel 10 used for display functions, and it contains multiple display units that implement its display functions. The non-display area NA may be the border area of ​​the display panel 10, and it may contain functional components that assist the display units within the display area AA in displaying information.

[0039] Please see Figure 1 A bonding terminal 400 is provided on the lower side of the display area AA. The bonding terminal 400 can be connected to an external circuit and transmits the signal input from the external circuit to the data trace, thereby driving the display panel 10 to display the image. For example, the bonding terminal 400 can be bonded to a chip or a flip-chip film to provide power and drive signals to the display panel 10.

[0040] Please see Figure 2 and Figure 3 The display device 100 includes a back frame 230 and a middle frame 240 connected to each other. The back frame 230 has a receiving cavity, the backlight module 20 is located in the receiving cavity, the display panel 10 is disposed on the light-emitting side of the backlight module 20, and the display panel 10 is spaced apart from the backlight module 20. The display panel 10 overlaps with the middle frame 240.

[0041] In this embodiment, the backlight module 20 is used to provide a light source to the display panel 10, which can be a liquid crystal display panel.

[0042] Please see Figure 4 The display panel 10 includes a first substrate 110, a second substrate 120 disposed opposite to the first substrate 110, and a liquid crystal layer LC located between the first substrate 110 and the second substrate 120. The first substrate may be an array substrate, and the second substrate may be a color filter substrate.

[0043] Please see Figure 4 The first substrate 110 may include a first substrate 111 and an array layer 114 located on the first substrate 111. The array layer 114 may include a plurality of thin-film transistors. The thin-film transistors may be etch-block type, back-channel etch type, or classified into bottom-gate thin-film transistors, top-gate thin-film transistors, etc., according to the position of the gate and the active layer 114b. The following description of the display panel film layer structure of this application takes a high transmission fringe field switching (HFS) type display product as an example.

[0044] Please see Figure 4 The first substrate 110 may include a light-shielding layer LS on the first substrate 111, a buffer layer 114a on the light-shielding layer LS, an active layer 114b on the buffer layer 114a, a gate insulating layer 114c on the active layer 114b, a gate layer 114d on the gate insulating layer 114c, an inter-insulating layer 114e on the gate layer 114d, a source-drain layer 114f on the inter-insulating layer 114e, a planarization layer 114g on the source-drain layer 114f, a common electrode layer 114h on the planarization layer 114g, a passivation layer 114i on the common electrode layer 114h, and a pixel electrode layer 114j on the passivation layer 114i.

[0045] Please see Figure 4 The second substrate 120 may include a second substrate 121 and a color filter layer 122 located on the second substrate 121. The color filter layer 122 includes a plurality of spaced color resist units and light-shielding units disposed between two adjacent color resist units. The plurality of light-shielding units may be in a mesh structure.

[0046] Please see Figure 4 The display panel 10 also includes a frame adhesive 130 disposed between the first substrate 110 and the second substrate 120, the frame adhesive 130 being located on the periphery of the display panel 10.

[0047] Please see Figure 4 The display panel 10 also includes a second polarizer POL2 and a first polarizer POL1. The second polarizer POL2 is disposed on the surface of the second substrate 120 away from the first substrate 110, and the first polarizer POL1 is disposed on the surface of the first substrate 110 away from the second substrate 120. That is, the second polarizer POL2 is disposed on the surface of the second substrate 121 away from the first substrate 110, and the first polarizer POL1 is disposed on the surface of the first substrate 111 away from the second substrate 120.

[0048] Please see Figure 4 The display device 100 also includes a cover plate CG disposed on the side of the display panel 10 away from the backlight module 20.

[0049] Please see Figure 2The first light strip 221 includes a first circuit board 221a and a plurality of first light-emitting devices LD1 electrically connected to the first circuit board 221a. The second light strip 222 includes a second circuit board 222a and a plurality of second light-emitting devices LD2 electrically connected to the second circuit board 222a. The first light-emitting device LD1 and the second light-emitting device LD2 can be LEDs, such as Micro LED (Micro Light-Emitting Diode), Mini LED (Mini Light-Emitting Diode), or conventionally sized LEDs.

[0050] In this embodiment, the first light strip 221 and the second light strip 222 can be located at the edge of the light guide plate 210. Light emitted from the light-emitting device is incident into the light guide plate 210. The light guide plate 210 is used to uniformly guide the incident light to the surface of the entire light guide plate 210 near the display panel 10.

[0051] For example, please see Figure 2 and Figure 3 The first light guide 211 has a first mating surface 211a, a first light guide surface 211b, a first bottom reflective surface 211c, a first side reflective surface 211d, a second side reflective surface 211e, and a second mating surface 211f. The first light guide surface 211b is disposed close to the display panel 10. The first light guide surface 211b and the first bottom reflective surface 211c are disposed opposite to each other. The first mating surface 211a and the second mating surface 211f are disposed opposite to each other. The first side reflective surface 211d and the second side reflective surface 211e are disposed opposite to each other. The first light strip 221 is usually disposed on the side where the second side reflective surface 211e is located, but the first light strip 221 of this application can also be disposed on the side where the first mating surface 211a or the second mating surface 211f is located.

[0052] For example, please see Figure 2 and Figure 3 The second light guide portion 212 has a third mating surface 212a, a second light guide surface 212b, a second bottom reflective surface 212c, a third side reflective surface 212d, and a fourth mating surface 212f. The second light guide surface 212b is disposed close to the display panel 10. The second light guide surface 212b and the second bottom reflective surface 212c are disposed opposite to each other. The third mating surface 212a and the fourth mating surface 212f are disposed opposite to each other. The third side reflective surface 212d and the second side reflective surface 211e are disposed opposite to each other. The second light strip 222 is usually disposed on the side where the third side reflective surface 212d is located, but the second light strip 222 of this application can also be disposed on the side where the third mating surface 212a or the fourth mating surface 212f is located.

[0053] It should be noted that the first mating surface 211a and the third mating surface 212a are located on the same side of the display device 100, the second mating surface 211f and the fourth mating surface 212f are located on the same side of the display device 100, one end of the first bottom reflective surface 211c and the first side reflective surface 211d are connected, and the other end of the second bottom reflective surface 212c and the first side reflective surface 211d are connected. That is, the first side reflective surface 211d in this application is equivalent to a stepped structure of the light guide plate 210.

[0054] It should be noted that the light guide surface refers only to the structure of the corresponding light guide part and does not represent the light emitting surface.

[0055] In the following embodiment, the first light strip 221 is disposed on the side where the first mating surface 211a is located, and the second light strip 222 is disposed on the side where the third mating surface 212a is located, as an example for illustration.

[0056] Please see Figure 3 The backlight module 20 further includes a reflective sheet 260, which is disposed on the surface of the first light guide 211 and the second light guide 212 away from the display panel 10. The reflective sheet 260 is used to reflect the light guided by the first bottom reflective surface 211c of the first light guide 211 and the second bottom reflective surface 212c of the second light guide 212 to the light guide surface of the corresponding light guide plate 210, thereby improving the light output efficiency of the entire backlight module 20 and increasing the brightness of the backlight module 20.

[0057] In this embodiment, the reflector 260 can be bonded to the light guide plate and the back frame 230 using an adhesive such as acrylic.

[0058] In this embodiment, the reflective sheet 260 can be arranged as a whole layer or in segments, that is, the reflective sheet 260 overlaps with the first light guide 211 and the second light guide 212, and the first light guide 211 and the second light guide 212 share the reflective sheet 260.

[0059] Please see Figure 3 The backlight module 20 further includes an optical adjustment layer 270, which is disposed on the side of the first light guide 211 and the second light guide 212 near the display panel 10. The optical adjustment layer 270 and the display panel 10 are spaced apart to adjust the light guided from the optical adjustment layer 270 to the display panel 10.

[0060] In this embodiment, the optical adjustment layer 270 is mainly used to adjust the light emitted from the light guide plate. For example, the optical adjustment layer 270 may have one or more functions such as a diffuser, prism sheet, brightness enhancement sheet, or advanced light control film; for example, the appendix to this application Figure 3 It has two optical adjustment layers.

[0061] In this embodiment, the optical adjustment layer 270 is disposed as a whole layer, that is, the optical adjustment layer 270 overlaps with the first light guide 211 and the second light guide 212, and the first light guide 211 and the second light guide 212 share the optical adjustment layer 270.

[0062] Please see Figure 3 The back frame 230 includes a bottom plate 231 and a side plate 232, which together form a receiving cavity. The light guide plate 210 is located within the receiving cavity. The bottom plate 231 includes a first support portion 231a and a second support portion 231b. The first support portion 231a corresponds to the first light guide portion 211, and the second support portion 231b corresponds to the second light guide portion 212. The surface of the first support portion 231a away from the light guide plate 210 and the surface of the second support portion 231b away from the light guide plate 210 are located on the same plane, and the thickness of the first support portion 231a is less than the thickness of the second support portion 231b.

[0063] In this embodiment, the base plate 231 and the side plate 232 are integrally formed, that is, the first support portion 231a and the second support portion 231b of this application are integrally provided and matched with the integrally formed first light guide portion 211 and second light guide portion 212; for example, the thinner first support portion 231a corresponds to the thicker first light guide portion 211, and the thicker second support portion 231b corresponds to the thinner second light guide portion 212, so as to support the light guide plate 210 and avoid the spacing between the light guide portions in different areas being too large.

[0064] In this embodiment, the back frame 230 can be a sheet metal part or a die-cast part.

[0065] In this embodiment, the sum of the thicknesses of the first support portion 231a and the first light guide portion 211 is equal to the sum of the thicknesses of the second support portion 231b and the second light guide portion 212.

[0066] In this embodiment, the distance between the first light guide portion 211 and the first support portion 231a is equal to the distance between the second light guide portion 212 and the second support portion 231b; and since a reflective sheet 260 is provided between the light guide plate 210 and the base plate 231, the distance between the first light guide portion 211 and the first support portion 231a, and the distance between the second light guide portion 212 and the second support portion 231b can be the thickness of the reflective sheet 260.

[0067] In this embodiment, the ratio of the thickness of the second light guide portion 212 to the thickness of the first light guide portion 211 is in the range of 0.3 to 0.95.

[0068] In this embodiment, the difference between the thickness of the first light guide portion 211 and the thickness of the second light guide portion 212 is in the range of 0.1 mm to 1 mm.

[0069] Please see Figure 3 , Figure 7 and Figure 8 The light guide plate 210 has a first light emitting area 210a and a second light emitting area 210b. The second light guide surface 212b is located within the second light emitting area 210b. A portion of the first light guide surface 211b is located within the first light emitting area 210a, and another portion of the first light guide surface 211b is located within the second light emitting area 210b.

[0070] In this embodiment, the first light-emitting area 210a corresponds to the first sub-area AA1 of the display panel 10, and the second light-emitting area 210b corresponds to the second sub-area AA2 of the display panel 10. That is, when the first light bar 221 is emitting light and the second light bar 222 is not emitting light, the light emitted by the first light bar 221 is guided to the first light-emitting area 210a through the first light guide 211, the first sub-area AA1 is displayed, and the second sub-area AA2 is not displayed; when the second light bar 222 is emitting light and the first light bar 221 is not emitting light, the light emitted by the second light bar 222 is guided to the second light-emitting area 210b through the second light guide 212, the second sub-area AA2 is displayed, and the first sub-area AA1 is not displayed.

[0071] Please see Figure 7 and Figure 8 The first light guide surface 211b includes a first sub-light guide surface 211b1 and a second sub-light guide surface 211b2, which are connected to the second light guide surface 212b. Since the first side reflective surface 211d does not extend to the surface of the light guide plate 210 near the display panel 10, when the first light strip 221 emits light, some light cannot be guided to the second sub-light guide surface 211b2 via the first side reflective surface 211d. Therefore, only the first sub-light guide surface 211b1 in the first light guide surface 211b is visible. 11b1 belongs to the first light-emitting area 210a; when the second light bar 222 emits light, the light emitted by the second light bar 222 can be guided to the second sub-light-guiding surface 211b2 through each reflective surface of the second light guide part 212. Therefore, the second sub-light-guiding surface 211b2 and the second light guide surface 212b both belong to the second light-emitting area 210b, which is equivalent to the surface of the second light guide part 212 emitting light covering the first side reflective surface 211d, that is, the surface of the second light guide part 212 emitting light covering the step of the light guide plate 210.

[0072] In current display devices 100, all are single-screen, single-backlight controlled displays, which cannot achieve zoned display. If zoned display is required, multiple displays and multiple backlights are needed for control. However, when multiple displays emit light simultaneously, the area between two adjacent display areas is usually a non-display area, which prevents the display device 100 from being fully lit. This application, by setting a first light guide 211 and a second light guide 212 with different thicknesses, allows the first light strip 221 to emit light from the first light-emitting area 210a and the second light strip 222 to emit light from the second light-emitting area 210b, thus achieving zoned light emission of the backlight module 20. When the first light strip 221 and the second light strip 222 emit light simultaneously, the non-light-emitting area between the zoned light emission areas is eliminated. Furthermore, the different thicknesses of the first light guide 211 and the second light guide 212 ensure that the light emitted by the first light strip 221 is directed only to the first light-emitting area 210a and the light emitted by the second light strip 222 is directed only to the second light-emitting area 210b, avoiding the technical problem of light crosstalk in the backlight module 20 during zoned display.

[0073] It should be noted that, due to the setting of the non-display area in the display device 100, the area of ​​the display area is usually smaller than the area of ​​the light-emitting area of ​​the light guide plate 210.

[0074] It should be noted that a reflective sheet 260 is also provided between the first side reflective surface 211d and the base plate 231.

[0075] For the first light guide 211 and the second light guide 212 with different thicknesses, they can eliminate the non-light-emitting area between the light-emitting zones. However, when the display device 100 is fully lit, bright or dark lines may appear between the first sub-area AA1 and the second sub-area AA2.

[0076] Please see Figure 5 The end of the first side reflective surface 211d near the second bottom reflective surface 212c is a reflective curved surface 211d1. That is, by setting the connection between the first side reflective surface 211d and the second bottom reflective surface 212c as a curved surface, this application changes the reflection angle of the light incident on the region, improves the reflection uniformity of the light incident on the region, and avoids the technical problem of bright or dark lines appearing between the first sub-region AA1 and the second sub-region AA2.

[0077] In this embodiment, the reflective surface 211d1 is an arc surface, for example, the reflective surface 211d1 can be an arc surface with a central angle of 90 degrees.

[0078] In this embodiment, the radius of the reflective surface 211d1 ranges from 0.05 mm to 0.2 mm.

[0079] In this embodiment, since the connection between the first side reflective surface 211d and the second bottom reflective surface 212c is set as a curved surface, the base plate 231 of this application can also be set with a corresponding curved surface in this area, so that the distance between the light guide plate 210 and the base plate 231 in each area is equal.

[0080] Please see Figure 9 and Figure 10 The first side reflective surface 211d includes a first sub-reflective surface 211d2 connected to the first bottom reflective surface 211c, and the angle between the first sub-reflective surface 211d2 and the first bottom reflective surface 211c is greater than or equal to 90 degrees. For example, in Figure 3 In the structure, the angle between the first sub-reflecting surface 211d2 and the first bottom reflecting surface 211c is equal to 90 degrees; for example, in Figure 9 and Figure 10 In the structure, the angle between the first sub-reflective surface 211d2 and the first bottom reflective surface 211c is greater than 90 degrees.

[0081] In this embodiment, the first sub-reflective surface 211d2 is set as an inclined surface, which changes the reflection angle of the light incident on the first sub-reflective surface 211d2, so as to reflect the light to the area away from the first light guide 211 and the second light guide 212, thereby avoiding the technical problem of bright or dark lines appearing between the first sub-region AA1 and the second sub-region AA2.

[0082] Please see Figure 10 The first side reflective surface 211d further includes a second sub-reflective surface 211d3 and a third sub-reflective surface 211d4. The second sub-reflective surface 211d3 is disposed between the first sub-reflective surface 211d2 and the third sub-reflective surface 211d4. The end of the third sub-reflective surface 211d4 away from the second sub-reflective surface 211d3 is connected to the reflective surface. The angle between the first sub-reflective surface 211d2 and the first bottom reflective surface 211c is greater than 90 degrees. The second sub-reflective surface 211d3 and the first bottom reflective surface 211c are parallel. The angle between the third sub-reflective surface 211d4 and the first bottom reflective surface 211c is greater than or equal to 90 degrees.

[0083] Please see Figure 5 The first bottom reflective surface 211c includes a first light adjustment surface 211c1 disposed near the second bottom reflective surface 212c, and the second bottom reflective surface 212c includes a second light adjustment surface 212c1 disposed near the first bottom reflective surface 211c. Both the first light adjustment surface 211c1 and the second light adjustment surface 212c1 are provided with microstructure patterns.

[0084] In this embodiment, the microstructure pattern can be a convex microlens, a concave microlens, or a microprism, etc.

[0085] In this embodiment, the microstructure pattern can disperse the light incident on the first light adjustment surface 211c1 and the second light adjustment surface 212c1, thereby improving the uniformity of light reflection in the region and avoiding the technical problem of bright or dark lines appearing between the first sub-region AA1 and the second sub-region AA2.

[0086] In this embodiment, the distribution density of the microstructure pattern in the first light-adjusting surface 211c1 is less than the distribution density of the microstructure pattern in the second light-adjusting surface 212c1. Since the light incident on the second sub-light guide surface 211b2 mainly comes from the reflected light of the second light-adjusting surface 212c1, this application can increase the distribution density of the microstructure pattern in the second light-adjusting surface 212c1 to further improve the uniformity of the light guided to the second sub-light guide surface 211b2, and at the same time avoid the technical problem of bright or dark lines appearing between the first sub-light guide surface 211b1 and the second sub-light guide surface 211b2.

[0087] In this embodiment, the microstructure pattern described above can also be provided on the first side reflective surface 211d of this application to disperse the light incident on the first side reflective surface 211d, thereby improving the uniformity of light reflection incident on the region and avoiding the technical problem of bright or dark lines appearing between the first sub-region AA1 and the second sub-region AA2.

[0088] Please see Figures 6 to 8 The first light strip 221 has a first center line L1 along the first direction X, and the second light strip 222 has a second center line L2 along the first direction X. The first center line L1 and the second center line L2 are not collinear. The first direction X is the direction from the first light guide 211 to the second light guide 212.

[0089] Please see Figure 8 In the thickness direction of the light guide plate 210, the first light strip 221 and the second bottom reflective surface 212c of the second light guide portion 212 are spaced apart on the plane.

[0090] Since the first light strip 221 is used to provide a light source to the first light guide 211 and the second light strip 222 is used to provide a light source to the second light guide 212, in order to avoid the light emitted by the first light strip 221 from entering the second light guide 212, this application sets the planes where the first light strip 221 and the second bottom reflective surface 212c of the second light guide 212 are located at intervals. That is, it is equivalent to making the first light strip 221 as close as possible to the first bottom reflective surface 211c of the first light guide 211, so that the oblique light rays of the first light strip 221 directed to the second light guide 212 are all incident on the first side reflective surface 211d, thus avoiding the technical problem of bright or dark lines appearing between the first sub-region AA1 and the second sub-region AA2.

[0091] To ensure more uniform light from the light strip incident on the light guide plate 210, the light strip is typically positioned in the middle region of the light-incident surface of the light guide plate 210. However, in this application, the first light guide portion 211 and the second light guide portion 212 have different thicknesses, and the first center line L1 and the second center line L2 are not collinear. This improves the uniformity of light from the first light strip 221 incident on the first light guide portion 211, as well as the uniformity of light from the second light strip 222 incident on the second light guide portion 212. Furthermore, it prevents light emitted from the first light strip 221 from entering the second light guide portion 212, thus ensuring the utilization efficiency of the light source.

[0092] In this embodiment, the first light strip 221 may also be disposed between the second light guide portion 212 and the back frame 230, and correspond to the first side reflective surface 211d. The second light strip 222 is disposed on the side of the second side reflective surface 212e away from the first side reflective surface 211d.

[0093] Please see Figure 11 The first light strip 221 is disposed on the surface of the second support portion 231b near the first side reflective surface 211d, and the second light strip 222 is disposed between the side plate 232 and the second side reflective surface 212e. This allows the light from the first light strip 221 to enter the first light guide portion 211 from the first side reflective surface 211d, avoiding the light from the first light strip 221 from entering the second light guide portion 212, thus avoiding the technical problem of bright or dark lines appearing between the first sub-region AA1 and the second sub-region AA2.

[0094] It should be noted that since the light from the first light strip 221 is incident into the first light guide 211 from the first side reflective surface 211d, the portion of the reflective sheet 260 between the first side reflective surface 211d and the second support 231b needs to be removed. At the same time, since the first light strip 221 is located between the second light guide 212 and the first support, in order to prevent the light emitted by the first light strip 221 from incident into the second light guide 212, the reflective sheet 260 corresponding to the second bottom reflective surface 212c and the reflective curved surface 211d1 needs to be retained.

[0095] Please see Figure 3 The backlight module 20 further includes a diffusion layer 280 disposed on one side of the first light guide 211 and the second light guide 212, and the diffusion layer 280 overlaps with both the first light guide 211 and the second light guide 212. The diffusion layer 280 has multiple light adjustment parts.

[0096] In this embodiment, the diffusion layer 280 can be provided as a whole layer, that is, the first light guide 211 and the second light guide 212 can share a single diffusion layer 280. The diffusion layer 280 is used to diffuse the light introduced from the first light guide 211 and the second light guide 212, for example, by increasing the diffuse reflection and scattering of the incident light, so as to improve the uniformity of the light emitted from the diffusion layer 280.

[0097] In this embodiment, the light adjustment part can be a white pigment, which can be formed by resin and dye, for example, it can be microparticles made of polymethyl methacrylate (PMMA); or, it can be a micro air bladder cavity formed by foaming process to improve the uniformity of light in the vertical direction.

[0098] In this embodiment, the volume percentage of the light adjustment unit in the diffusion layer 280 can be 2% to 30%.

[0099] In this embodiment, the diffusion layer 280 is formed with an uneven orange peel texture or frosted layer by an etching process on the surface near the display panel 10 and / or the surface away from the display panel 10, so as to improve the diffuse reflection of light incident on the diffusion layer 280 and light exiting the diffusion layer 280, and further improve the uniformity of light.

[0100] Since the thickness of the first light guide 211 is greater than the thickness of the second light guide 212, the path length of light differs in different light guides. For example, the optical path of light emitted from the first light bar 221 leading to the first light output area 210a is greater than the optical path of light emitted from the second light bar 222 leading to the second light output area 210b. Therefore, the light source loss in the first light guide 211 is greater than the light source loss in the second light guide 212, resulting in the average brightness of the light output from the first light output area 210a being lower than the average brightness of the light output from the second light output area 210b.

[0101] In this embodiment, the luminous intensity of the first light strip 221 is greater than that of the second light strip 222. This application achieves a greater luminous intensity for the first light strip 221 than for the second light strip 222 by increasing the luminous intensity of the first light strip 221 or decreasing the luminous intensity of the second light strip 222. This balances the difference in light source loss between the first light guide 211 and the second light guide 212, and improves the technical problem of differing average brightness between the first light-emitting region 210a and the second light-emitting region 210b.

[0102] In this embodiment, the light emission brightness of the first light strip 221 and the second light strip 222 can be controlled by adjusting the spacing between the light-emitting devices, the light-emitting area of ​​the light-emitting devices, and the current intensity of the light-emitting devices.

[0103] For example, this application can reduce the current input to the second light-emitting device LD2 to reduce the brightness of the second light strip 222, or increase the current input to the first light-emitting device LD1 to increase the brightness of the first light strip 221; this application can reduce the light-emitting area of ​​the second light-emitting device LD2 to reduce the brightness of the second light strip 222, or increase the light-emitting area of ​​the first light-emitting device LD1 to reduce the brightness of the first light strip 221; this application can increase the spacing between the light-emitting devices to reduce the brightness of the second light strip 222, or decrease the spacing between the light-emitting devices to increase the brightness of the first light strip 221; this application can reduce the number of light-emitting devices to reduce the brightness of the second light strip 222, or increase the number of light-emitting devices to increase the brightness of the first light strip 221; or, simultaneously adjust at least two of the spacing between the light-emitting devices, the light-emitting area of ​​the light-emitting devices, the current intensity of the light-emitting devices, and the number of light-emitting devices to adjust the brightness of the first light strip 221 and the second light strip 222.

[0104] Please see Figures 12 to 16This application proposes another display device 100, which includes a backlight module 20 and a display panel 10 located on the light-emitting side of the backlight module 20. The backlight module 20 includes a back frame 230 and a light guide plate 210, a first light strip 221 and a second light strip 222 located within the back frame 230. The light guide plate 210 includes a first light guide portion 211 and a second light guide portion 212 integrally disposed therein. The first light strip 221 corresponds to the first light-incident surface of the first light guide portion 211, and the second light strip 222 corresponds to the second light-incident surface of the second light guide portion 212.

[0105] In this embodiment, the display device 100 includes a back frame 230 and a middle frame 240 connected to each other. The back frame 230 has a receiving cavity, and the backlight module 20 is located in the receiving cavity.

[0106] In this embodiment, the light guide plate 210 is further provided with an optical adjustment section 300 on the side near the base plate 231. The optical adjustment section 300 overlaps with the first light guide section 211 and the second light guide section 212.

[0107] This application achieves zoned light emission of the backlight module 20 by setting independently controlled first light strip 221 and second light strip 222 to form two independent light-guiding zones in the light guide plate 210. The integrated first light guide part 211 and second light guide part 212 eliminate the non-light-emitting area between the zoned light emission zones, solving the technical problem of non-display areas appearing when the existing zoned display display device 100 is fully lit. At the same time, the optical adjustment part 300 changes the reflection angle of the light guiding the area, avoiding the light from concentrating in the area where the optical adjustment part 300 is located, avoiding the technical problem of bright lines appearing when the display device 100 is fully lit, and improving the display uniformity of the display device 100.

[0108] In this embodiment, the display panel 10 includes a first sub-area AA1 and a second sub-area AA2. When the first sub-area AA1 is configured to display and the second sub-area AA2 is configured to be off, the first light strip 221 emits light and the second light strip 222 does not emit light. When the second sub-area AA2 is configured to display and the first sub-area AA1 is configured to be off, the first light strip 221 does not emit light and the second light strip 222 emits light.

[0109] It should be noted that the number of light guide sections in the light guide plate 210 of this application may include three or more.

[0110] Please see Figure 12The first light strip 221 includes a first circuit board 221a and a plurality of first light-emitting devices LD1 electrically connected to the first circuit board 221a. The second light strip 222 includes a second circuit board 222a and a plurality of second light-emitting devices LD2 electrically connected to the second circuit board 222a. The first light-emitting device LD1 and the second light-emitting device LD2 can be LEDs, such as Micro LEDs, Mini LEDs or conventional-sized LEDs.

[0111] In this embodiment, the first light strip 221 and the second light strip 222 can be located at the edge of the light guide plate 210. Light emitted from the light-emitting device is incident into the light guide plate 210. The light guide plate 210 is used to uniformly guide the incident light to the surface of the entire light guide plate 210 near the display panel 10.

[0112] For example, please see Figure 12 and Figure 13 The first light guide 211 has a fifth mating surface 411a, a third light surface 411b, a third bottom reflective surface 411c, a third side reflective surface 411d, and a sixth mating surface 411f. The third light surface 411b is disposed close to the display panel 10. The third light surface 411b and the third bottom reflective surface 411c are disposed opposite to each other. The fifth mating surface 411a and the sixth mating surface 411f are disposed opposite to each other. The first light strip 221 is usually disposed on the side where the third side reflective surface 411d is located, but the first light strip 221 of this application can also be disposed on the side where the fifth mating surface 411a or the sixth mating surface 411f is located.

[0113] For example, please see Figure 12 and Figure 13 The second light guide 212 has a seventh mating surface 412a, a fourth light surface 412b, a fourth bottom reflective surface 412c, a fourth side reflective surface 412d, and an eighth mating surface 412f. The fourth light surface 412b is disposed close to the display panel 10. The fourth light surface 412b and the fourth bottom reflective surface 412c are disposed opposite to each other. The seventh mating surface 412a and the eighth mating surface 412f are disposed opposite to each other. The fourth side reflective surface 412d and the third side reflective surface 411d are disposed opposite to each other. The second light strip 222 is usually disposed on the side where the fourth side reflective surface 412d is located, but the second light strip 222 of this application can also be disposed on the side where the seventh mating surface 412a or the eighth mating surface 412f is located.

[0114] It should be noted that the fifth mating surface 411a and the seventh mating surface 412a are located on the same side of the display device 100, and the sixth mating surface 411f and the eighth mating surface 412f are located on the same side of the display device 100. In the following embodiment, the first light strip 221 is set on the side where the fifth mating surface 411a is located, and the second light strip 222 is set on the side where the seventh mating surface 412a is located, as an example.

[0115] It should be noted that, for Figure 12 In an embodiment of this application, the first light-incident surface of the first light guide portion 211 is the fifth mating surface 411a, and the second light-incident surface of the second light guide portion 212 is the seventh mating surface 412a.

[0116] Please see Figure 13 The backlight module 20 further includes a reflective sheet 260, which is disposed on the surface of the first light guide portion 211 and the second light guide portion 212 away from the display panel 10.

[0117] In this embodiment, the reflective sheet 260 can be arranged as a whole layer or in segments, that is, the reflective sheet 260 overlaps with the first light guide 211 and the second light guide 212, and the first light guide 211 and the second light guide 212 share the reflective sheet 260.

[0118] Please see Figure 13 The backlight module 20 further includes an optical adjustment layer 270, which is disposed on the side of the first light guide 211 and the second light guide 212 near the display panel 10. The optical adjustment layer 270 and the display panel 10 are spaced apart to adjust the light guided from the optical adjustment layer 270 to the display panel 10.

[0119] In this embodiment, the light-regulating layer 270 may have one or more functions such as a diffuser, prism sheet, brightness enhancement film, or advanced light control film; for example, as per the appendix of this application. Figure 13 It has two optical adjustment layers.

[0120] In this embodiment, the optical adjustment layer 270 is disposed as a whole layer, that is, the optical adjustment layer 270 overlaps with the first light guide 211 and the second light guide 212, and the first light guide 211 and the second light guide 212 share the optical adjustment layer 270.

[0121] Please see Figure 13The backlight module 20 further includes a diffusion layer 280 disposed on one side of the first light guide 211 and the second light guide 212, and the diffusion layer 280 overlaps with both the first light guide 211 and the second light guide 212. The diffusion layer 280 has multiple light adjustment parts, and the specific structure of the diffusion layer 280 can be found in [reference needed]. Figure 3 The diffusion layer 280 in the middle.

[0122] Please see Figure 13 and Figure 14 The optical adjustment unit 300 has an optical adjustment surface 310, which includes a first sub-adjustment surface 311 and a second sub-adjustment surface 312. The first sub-adjustment surface 311 is located on the surface of the first light guide unit 211, and the second sub-adjustment surface 312 is located on the surface of the second light guide unit 212. The first sub-adjustment surface 311 and the second sub-adjustment surface 312 are symmetrically arranged.

[0123] In this embodiment, the optical adjustment surface 310 protrudes to the side away from the base plate 231, which is equivalent to having a notch or recess on the side of the light guide plate 210 near the base plate 231; at the same time, the optical adjustment part 300 of this application is a continuous notch or a continuous groove.

[0124] In this embodiment, the cross-section of the optical adjustment surface 310 can be triangular or arc-shaped. The following embodiment uses a triangle as an example for illustration.

[0125] Please see Figure 13 and Figure 14 The first light guide 211 has a third light surface 411b, and the second light guide 212 has a fourth light surface 412b. The boundaries of the third light surface 411b and the fourth light surface 412b are both located within the reference plane RP, and the reference plane RP is perpendicular to the light emitting surface of the light guide plate 210.

[0126] Since the display device 100 needs to perform zoned display, and the first light guide 211 and the second light guide 212 are integrally arranged, the light emitted by the first light bar 221 and the light emitted by the second light bar 222 will converge in the area where the third light surface 411b and the fourth light surface 412b are located. This causes a technical problem of bright lines appearing in the adjacent areas of the first sub-area AA1 and the second sub-area AA2 when the display device 100 is displaying. However, this application solves the technical problem of bright lines appearing in the display device 100 when it is fully lit by setting an optical adjustment part 300 on the side of the light guide plate 210 near the bottom plate 231, thereby changing the reflection angle of the light incident on the optical adjustment part 300 and avoiding the light from concentrating in the area where the optical adjustment part 300 is located. At the same time, the first sub-adjustment surface 311 and the second sub-adjustment surface 312 are symmetrically arranged, so that the optical adjustment part 300 can adjust the light from the first light bar 221 and the second light bar 222 to a similar degree, further improving the display uniformity of the display device 100.

[0127] In this embodiment, since the incident light to the optical adjustment unit 300 is used to change the reflection angle of the light, if the angle between the first sub-adjustment surface 311 and the second sub-adjustment surface 312 is too small, the adjustment of the reflection angle of some light rays will be too small, and the light rays converging in the area where the optical adjustment unit 300 is located cannot be effectively exported. Therefore, this application makes the acute angle A1 between the first sub-adjustment surface 311 and the light-emitting surface of the light guide plate 210 greater than or equal to 30°, and the acute angle A2 between the second sub-adjustment surface 312 and the light-emitting surface of the light guide plate 210 greater than or equal to 30°.

[0128] In this embodiment, the arrangement of the optical adjustment unit 300 will affect the intensity of the light guide plate 210. If the depth of the optical adjustment is too large, the intensity of the light guide plate 210 will be too small, that is, the depth of the optical adjustment unit 300 is negatively correlated with the intensity of the light guide plate 210. If the depth of the optical adjustment unit 300 is too small, the area of ​​the adjustment surface used to adjust the light in that area will be smaller, and the light converged in the area where the optical adjustment unit 300 is located cannot be effectively exported.

[0129] In this embodiment, the application can make the maximum distance T between the optical adjustment surface 310 and the surface of the light guide plate 210 near the base plate 231 in the thickness direction of the light guide plate 210, and the ratio of the thickness H of the light guide plate 210 to less than or equal to 0.5. That is, it is equivalent to the ratio of the depth T of the optical adjustment part 300 to the thickness H of the light guide plate 210 to less than or equal to 0.5, so as to balance the strength of the light guide plate 210 and the adjustment efficiency of the optical adjustment part 300.

[0130] Since the reflective sheet 260 is usually laid in a whole layer, and the surface in the area where the optical adjustment part 300 is located cannot be attached to the reflective sheet 260, some of the light rays incident on the optical adjustment part 300 are refracted and incident into the adjacent light guide part.

[0131] In this embodiment, the optical adjustment section 300 has a filling material FL, which is a reflective material to reflect the light incident on the area and avoid crosstalk between adjacent light guides; the reflective material can be white ink.

[0132] In this embodiment, the optical adjustment section 300 has a filling material FL, which is a high refractive index material. For example, the refractive index of the high refractive index material is greater than that of the light guide plate 210. When light is incident on the optical adjustment section 300, since the refractive index of the filling material in the optical adjustment section 300 is greater than that of the light guide plate 210, the light can undergo total internal reflection, thus avoiding crosstalk between adjacent light guide sections.

[0133] Please see Figure 15 The third bottom reflective surface 411c, the fourth bottom reflective surface 412c, and the optical adjustment surface 310 are all provided with multiple microstructure patterns MP; the distribution density of the microstructure patterns MP on the optical adjustment surface 310 is greater than the distribution density of the microstructure patterns MP on the third bottom reflective surface 411c and the distribution density of the microstructure patterns MP on the fourth bottom reflective surface 412c.

[0134] In this embodiment, the microstructure pattern MP can be a convex microlens, a concave microlens, or a microprism, etc.

[0135] In this embodiment, the microstructure pattern MP can disperse the light incident on the corresponding area, improving the uniformity of light reflection in the area. Since the light in the area where the optical adjustment unit 300 is located tends to converge, this application can further disperse the light incident on the area by increasing the distribution density of the microstructure pattern MP in the area, thereby improving the uniformity of light in the area where the optical adjustment unit 300 is located and avoiding the technical problem of bright or dark lines appearing in the adjacent areas of the first sub-area AA1 and the second sub-area AA2.

[0136] Due to the technical problem of bright lines appearing in the area where the optical adjustment unit 300 is located, this application can reduce the brightness of light incident on the area where the optical adjustment unit 300 is located.

[0137] Please see Figure 16 and Figure 17The display panel also includes a dimming component LCS, which corresponds to the light guide plate 210 in the area where the optical adjustment unit 300 is located. The driving signal sources of the dimming component LCS, the first lamp strip 221 and the second lamp strip 222 are all different.

[0138] In this embodiment, the dimming component LCS includes a third light bar 223 and a fourth light bar 224. The third light bar 223 corresponds to the first light guide portion 211 and is disposed close to the first sub-adjustment surface 311. The fourth light bar 224 corresponds to the second light guide portion 212 and is disposed close to the first sub-adjustment surface 311.

[0139] It should be noted that the driving signal sources of the third light strip 223 and the fourth light strip 224 are different, which means that the third light strip 223 and the fourth light strip 224 have independent circuit boards. For example, the third light strip 223 includes a third light-emitting device LD3 and a third circuit board 223a, and the fourth light strip 224 includes a fourth light-emitting device LD4 and a fourth circuit board 224a.

[0140] In this embodiment, the third light-emitting device LD3 and the fourth light-emitting device LD4 can both be LEDs, such as Micro LEDs, Mini LEDs, or conventionally sized LEDs.

[0141] In this embodiment, the luminous intensity per unit area of ​​the dimming component LCS is less than that of the first light strip 221, and the luminous intensity per unit area of ​​the dimming component LCS is less than that of the second light strip 222; that is, the luminous intensity per unit area of ​​the third light strip 223 and the fourth light strip 224 is less than that of the first light strip 221, and the luminous intensity per unit area of ​​the third light strip 223 and the fourth light strip 224 is less than that of the second light strip 222.

[0142] In this embodiment, the present application can adjust the luminous brightness of the first light strip 221, the second light strip 222, the third light strip 223 and the fourth light strip 224 per unit area by adjusting the spacing between the light-emitting devices, the luminous area of ​​the light-emitting devices, the number of light-emitting devices, and the current intensity of the light-emitting devices.

[0143] For example, taking the first light strip 221 and the third light strip 223 as examples, this application can reduce the current input to the third light-emitting device LD3 to reduce the luminous brightness of the third light strip 223, reduce the luminous area of ​​the third light-emitting device LD3 to reduce the luminous brightness of the third light strip 223, increase the spacing between the light-emitting devices to reduce the luminous brightness of the third light strip 223, or reduce the number of light-emitting devices to reduce the luminous brightness of the third light strip 223; or, at least two of the spacing between the light-emitting devices, the luminous area of ​​the light-emitting devices, the current intensity of the light-emitting devices, and the number of light-emitting devices can be adjusted simultaneously to adjust the luminous brightness per unit area of ​​the first light strip 221, the second light strip 222, the third light strip 223, and the fourth light strip 224.

[0144] This application addresses the technical problem of bright lines appearing in the area between the first light guide 211 and the second light guide 212 by separately setting a third light strip 223 and a fourth light strip 224 in the region between the first light guide 211 and the second light guide 212, and reducing the luminous intensity of the third light strip 223 and the fourth light strip 224 per unit area. This reduces the light concentrated in the area between the first sub-area AA1 and the second sub-area AA2, avoids the technical problem of bright lines appearing in the area between the first sub-area AA1 and the second sub-area AA2 when the display area of ​​the display device 100 is fully lit, and improves the uniformity of the display brightness of the display device 100.

[0145] In this embodiment, to facilitate the installation of the light strips, the first light strip 221, the second light strip 222, and the dimming component LCS can all be located on the same side of the light guide plate 210. For example, the first light strip 221, the second light strip 222, and the dimming component LCS can all be located on the side where the fifth mating surface 411a and the seventh mating surface 412a are located.

[0146] Please see Figure 16 The first light strip 221 has a first center line L1, the second light strip 222 has a second center line L2, the third light strip 223 has a third center line L3, and the fourth light strip 224 has a fourth center line L4. The first center line L1, the second center line L2, the third center line L3, and the fourth center line L4 are collinear.

[0147] In this embodiment, the first light strip 221, the second light strip 222, the third light strip 223, and the fourth light strip 224 are all arranged on the same straight line, which facilitates the installation of the light strips; at the same time, the luminous intensity per unit area of ​​the third light strip 223 and the fourth light strip 224 are set separately, which can adjust the light incident on the area where the optical adjustment unit 300 is located, and improve the technical problem of bright lines appearing in the area between the first sub-region AA1 and the second sub-region AA2.

[0148] Please see Figure 17The first centerline L1 and the second centerline L2 are collinear, the third centerline L3 and the fourth centerline L4 are collinear, and the first centerline L1 and the third centerline L3 are not collinear.

[0149] The first light strip 221, the second light strip 222, the third light strip 223, and the fourth light strip 224 are all arranged on the same straight line. Although this facilitates the installation of the light strips, it also causes some light to be unevenly incident into the corresponding light guide. Since the light guide structures adjacent to the first light guide 211 and the second light guide 212 are irregularly shaped, this application adjusts the position of the third light strip 223 and the fourth light strip 224 to adjust the uniformity of the light incident into the corresponding light guide structure.

[0150] For example, please see Figure 17 The first light guide portion 211 includes a first sub-portion 210c near the second light guide portion 212, the second light guide portion 212 includes a second sub-portion 210d near the first light guide portion 211, the light emission center of the third light strip 223 can be coaxial with the center of the first sub-portion 210c, and the light emission center of the fourth light strip 224 can be coaxial with the center of the second sub-portion 210d.

[0151] In this embodiment, the light-emitting center of the light strip is coaxial with the center of the light guide portion perpendicular to the light incident surface, so that the light emitted by the light strip can be uniformly incident on the light-emitting surface of the light guide plate 210, thereby improving the uniformity of the light emitted from the light guide plate 210 and thus improving the display uniformity of the display device 100.

[0152] It should be noted that in the above embodiments, the multiple display areas of the display device 100 can be respectively the central control area, the passenger side area, the instrument panel area, etc., meaning that different functional screens have different areas. For example, the display area for the instrument panel is the smallest, while the display area for the passenger side area is the largest. The difference in display area necessitates corresponding adjustment of the area of ​​the light guide plate 210 and the brightness of the light source.

[0153] In the above embodiments, for vehicle applications, when the vehicle is in motion, the display device 100 can automatically turn off the backlight on the central control screen, with only the backlight corresponding to the instrument area being on; when the vehicle is parked, the display device 100 can drive the backlight corresponding to the central control screen to turn on, thereby enabling entertainment functions.

[0154] In the above embodiments, the luminous intensity of the first light strip 221 is positively correlated with the area of ​​the light-emitting surface of the first light guide 211, and the luminous intensity of the second light strip 222 is positively correlated with the area of ​​the light-emitting surface of the second light guide 212. For example, when the areas of the first light guide 211 and the second light guide 212 are equal, the luminous intensity of the first light strip 221 and the second light strip 222 are equal; when the area of ​​the first light guide 211 is smaller than the area of ​​the second light guide 212, the luminous intensity of the first light strip 221 is smaller than the luminous intensity of the second light strip 222; when the area of ​​the first light guide 211 is larger than the area of ​​the second light guide 212, the luminous intensity of the first light strip 221 is greater than the luminous intensity of the second light strip 222.

[0155] In the above embodiments, the first light-emitting device LD1, the second light-emitting device LD2, the third light-emitting device LD3 and the fourth light-emitting device LD4 of this application can use conventional-sized LEDs to achieve the above functions, without the need to use Micro LEDs or Mini LEDs, which further saves costs compared with existing Micro LED and Mini LED backlights; at the same time, compared with existing large-size split backlights and large-size integrated backlights, the power consumption of this application can be reduced by 50%.

[0156] It should be noted that the display device 100 of this application can be any product or component with display function, such as a vehicle screen, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0157] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0158] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0159] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0160] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A backlight module, characterized in that, include: Back frame; A light guide plate is located within the back frame, and the light guide plate includes an integrally formed first light guide portion and a second light guide portion; The first light strip and the second light strip, wherein the first light strip corresponds to the first light-incident surface of the first light guide portion, and the second light strip corresponds to the second light-incident surface of the second light guide portion; The surfaces of the first light guide portion and the second light guide portion that are away from the back frame are located on the same plane, and the thickness of the first light guide portion is greater than the thickness of the second light guide portion.

2. The backlight module according to claim 1, characterized in that, The back frame includes a bottom plate and a side plate, the bottom plate and the side plate enclosing a receiving cavity, and the light guide plate is located inside the receiving cavity; The base plate includes a first support portion and a second support portion. The first support portion corresponds to the first light guide portion, and the second support portion corresponds to the second light guide portion. The surface of the first support portion away from the light guide plate and the surface of the second support portion away from the light guide plate are located on the same plane, and the thickness of the first support portion is less than the thickness of the second support portion.

3. The backlight module according to claim 2, characterized in that, The sum of the thicknesses of the first support portion and the first light guide portion is equal to the sum of the thicknesses of the second support portion and the second light guide portion.

4. The backlight module according to claim 2, characterized in that, The ratio of the thickness of the second light guide portion to the thickness of the first light guide portion ranges from 0.3 to 0.

95.

5. The backlight module according to claim 4, characterized in that, The difference between the thickness of the first light guide and the thickness of the second light guide ranges from 0.1 mm to 1 mm.

6. The backlight module according to claim 1, characterized in that, The first light guide includes a first bottom reflective surface and a first side reflective surface, and the second light guide includes a second bottom reflective surface. One end of the first bottom reflective surface and the first side reflective surface are connected, and the other end of the second bottom reflective surface and the first side reflective surface are connected. The end of the first side reflective surface closest to the second bottom reflective surface is a reflective curved surface.

7. The backlight module according to claim 6, characterized in that, The reflective surface is a circular arc surface.

8. The backlight module according to claim 7, characterized in that, The radius of the reflective surface ranges from 0.05 mm to 0.2 mm.

9. The backlight module according to claim 6, characterized in that, The first bottom reflective surface includes a first light-adjusting surface disposed near the second bottom reflective surface, and the second bottom reflective surface includes a second light-adjusting surface disposed near the first bottom reflective surface; The first side reflective surface, the first light-adjusting surface, and the second light-adjusting surface are all provided with microstructure patterns.

10. The backlight module according to claim 9, characterized in that, The distribution density of the microstructure pattern in the first light-adjusting surface is less than the distribution density of the microstructure pattern in the second light-adjusting surface.

11. The backlight module according to claim 6, characterized in that, The first side reflective surface includes a first sub-reflective surface connected to the first bottom reflective surface, and the angle between the first sub-reflective surface and the first bottom reflective surface is greater than or equal to 90 degrees.

12. The backlight module according to claim 11, characterized in that, The first side reflective surface further includes a second sub-reflective surface and a third sub-reflective surface. The second sub-reflective surface is disposed between the first sub-reflective surface and the third sub-reflective surface. The end of the third sub-reflective surface away from the second sub-reflective surface is connected to the reflective surface. Wherein, the angle between the first sub-reflective surface and the first bottom reflective surface is greater than 90 degrees, the second sub-reflective surface and the first bottom reflective surface are parallel, and the angle between the third sub-reflective surface and the first bottom reflective surface is greater than or equal to 90 degrees.

13. The backlight module according to claim 6, characterized in that, The backlight module further includes a second side reflective surface connected to the second bottom reflective surface, and the second side reflective surface is arranged parallel to the first side reflective surface; The first light strip is disposed between the second light guide and the back frame, and corresponds to the first side reflector. The second light strip is disposed on the side of the second side reflector that is away from the first side reflector.

14. The backlight module according to any one of claims 1 to 13, characterized in that, The first light strip has a first center line along a first direction, and the second light strip has a second center line along the first direction, wherein the first center line and the second center line are not collinear.

15. The backlight module according to claim 14, characterized in that, In the thickness direction of the light guide plate, the first light strip and the plane containing the second bottom reflective surface of the second light guide section are spaced apart.

16. The backlight module according to any one of claims 1 to 13, characterized in that, The luminous intensity of the first light strip is greater than that of the second light strip.

17. The backlight module according to any one of claims 1 to 13, characterized in that, The first light guide portion includes a first light guide surface, the second light guide portion includes a second light guide surface, and the light guide plate has a first light emission area and a second light emission area; The second light guide surface is located within the second light emission area, a portion of the first light guide surface is located within the first light emission area, and another portion of the first light guide surface is located within the second light emission area.

18. A display device, characterized in that, The display device includes a backlight module and a display panel as described in any one of claims 1 to 17, the display panel including a first sub-region and a second sub-region, the first sub-region corresponding to the first light guide portion and the second sub-region corresponding to the second light guide portion.

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