Light guide plate, backlight module and display
By setting grooves on the light-out surface of the light guide plate, light is collected and the intensity of the tail light is reduced, the problems of bright lines and bright edges at the tail of the traditional light guide plate are solved, and the visual effect and screen-occupation ratio of the monitor are improved.
Patent Information
- Application Number
- CN202421645386.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The traditional light guide often has bad phenomena such as bright lines and bright edges at the tail of the light-guide surface away from the light-incoming surface, which affects the optical performance and subjective visual effects of the display.
A light guide plate is designed, and its light-out surface is provided with grooves, and the groove extends along the direction of the light-input surface to the tail. The depth of the groove near the light-input surface is smaller than the depth near the tail, and the depth at the lifting position is the largest to collect light and reduce the intensity of the tail light.
Through the design of the groove, the utilization rate of light is improved, the intensity of light at the tail of the light guide plate is reduced, the phenomenon of bright lines and bright edges is improved, subjective visual effects are improved, and the frameless design is achieved, and the screen-occupation ratio of the monitor is improved.
Smart Images
Figure CN222800899U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display, in particular to a light guide plate, a backlight module and a display. Background Art
[0002] As the MNT display market matures, customers' requirements for displays are getting higher and higher.
[0003] The light guide plate is responsible for converting point light sources into surface light sources. The quality of the light guide plate has a great impact on the optical performance of the display. Traditional light guide plates that are far away from the light-entering surface usually have undesirable bright lines and bright edges, which affects the subjective visual effect. Utility Model Content
[0004] The main purpose of the utility model is to provide a light guide plate, a backlight module and a display, aiming to improve the undesirable phenomenon of bright lines and bright edges appearing at the tail of the light guide plate away from the light incident surface, so as to enhance the subjective visual effect.
[0005] To achieve the above-mentioned purpose, the utility model provides a light guide plate, the light guide plate having a light incident surface, a light emitting surface adjacent to the light incident surface, and a tail portion away from the light incident surface, the light emitting surface being provided with a groove, and the groove extending from the light incident surface to the tail portion;
[0006] The groove is defined as having a knife-lifting position between the light-entering surface and the tail portion, the depth of the groove close to the light-entering surface is H1, the depth of the groove close to the tail portion is H2, and the depth of the groove corresponding to the knife-lifting position is H3, then the condition is satisfied: H1 <H3,H2<H3。
[0007] In an embodiment of the present invention, the depth of the groove corresponding to the knife lifting position is the deepest.
[0008] In an embodiment of the present invention, the depth of the groove from the light incident surface to the knife lifting position gradually becomes deeper, and the depth of the groove from the knife lifting position to the tail portion gradually becomes shallower.
[0009] In one embodiment of the present invention, in the direction from the light incident surface to the tail, the knife lifting position is located at 2 / 3 of the distance from the light incident surface to the tail.
[0010] In an embodiment of the present invention, the groove is a V-shaped groove.
[0011] In one embodiment of the present invention, a dot structure is provided on the groove wall of the groove, and the density of the dot structure near the light incident surface and the density near the tail are both smaller than the density of the dot structure near the knife lifting position.
[0012] In an embodiment of the present invention, the light guide plate further comprises a light reflecting surface arranged opposite to the light emitting surface, and the light reflecting surface is provided with dots.
[0013] In an embodiment of the present invention, the density of the dots near the light incident surface and the density near the tail are both smaller than the density of the dots near the knife lifting position.
[0014] In one embodiment of the present invention, the density of the mesh points is the highest near the knife lifting position.
[0015] In one embodiment of the present invention, the direction from the light incident surface to the tail is defined as a first direction, the light guide plate has a second direction set at an angle to the first direction, a plurality of grooves are provided, and the plurality of grooves are spaced apart along the second direction.
[0016] The utility model also provides a backlight module, comprising:
[0017] Back panel;
[0018] A frame, the frame is arranged around the edge of the back plate and is combined with the back plate to form a mounting groove;
[0019] A reflective sheet, the reflective sheet is arranged in the mounting groove;
[0020] The light guide plate as described above is arranged in the mounting groove and is located on a side of the reflective sheet away from the back plate;
[0021] A light bar, the light bar being arranged in the mounting groove and arranged on the inner wall of the frame close to the light incident surface of the light guide plate;
[0022] The optical film is arranged in the mounting groove and is located on a side of the light guide plate away from the reflective sheet.
[0023] The utility model further provides a display, comprising a display panel and the backlight module as described above, wherein the display panel is arranged on the light emitting side of the backlight module.
[0024] In the light guide plate proposed by the utility model, a groove is provided on the light output surface of the light guide plate, the depth of the groove near the light incident surface is less than the depth of the groove corresponding to the knife lifting position, and the depth of the groove near the tail is less than the depth of the groove corresponding to the knife lifting position; in this way, after the light enters the light guide plate from the light incident surface, the light can be intercepted by the knife lifting position with a deeper depth, which can improve the utilization rate of the light and reduce the intensity of the light at the tail of the light guide plate, thereby improving the undesirable phenomenon of bright lines and bright edges appearing at the tail of the light guide plate away from the light incident surface, thereby improving the subjective visual effect.
[0025] In addition, since the light intensity at the tail of the light guide plate is reduced, the use of a narrower frame can also prevent light leakage, so the frame can be made narrower, or even a frameless design can be achieved, which can increase the screen-to-body ratio of the entire display; and, when some structures permit (such as when the coverage area of the frame is relatively large), the side sticker at the tail of the light guide plate can be directly omitted to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0027] Figure 1 A cross-sectional view of an embodiment of a light guide plate of the utility model;
[0028] Figure 2 This is a schematic end view of an embodiment of a light guide plate of the utility model;
[0029] Figure 3 This is a schematic diagram of an embodiment of a light guide plate of the utility model when refracting light;
[0030] Figure 4 It is a partial structural schematic diagram of an embodiment of a light guide plate of the utility model;
[0031] Figure 5 An exploded view of an embodiment of a backlight module of the utility model;
[0032] Figure 6 It is an exploded view of an embodiment of the display of the present invention.
[0033] Description of Figure Numbers:
[0034] Label name Label name 1 monitor a First Direction 1000 Backlight module b Second direction 100 Light guide plate 200 Back Plate 10 Light incident surface 300 frame 20 Light emitting surface 400 Reflective sheet 21 Grooves 500 Light Bar 211 Knife lifting position 600 Optical film 30 Tail 700 Face frame 40 Reflective surface 2000 Display Panel 41 Outlets
[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0039] The utility model provides a light guide plate 100 , which aims to improve the undesirable phenomenon of bright lines and bright edges appearing at the tail portion 30 of the light guide plate 100 away from the light incident surface 10 , so as to enhance the subjective visual effect.
[0040] Combined with reference Figures 1 to 4 In one embodiment of the light guide plate 100 of the utility model, the light guide plate 100 has a light incident surface 10, a light emitting surface 20 adjacent to the light incident surface 10, and a tail portion 30 away from the light incident surface 10, and the light emitting surface 20 is provided with a groove 21, and the groove 21 is extended from the light incident surface 10 to the tail portion 30; wherein, the groove 21 is defined to have a knife-lifting position 211 located between the light incident surface 10 and the tail portion 30, the depth of the groove 21 close to the light incident surface 10 is H1, the depth of the groove 21 close to the tail portion 30 is H2, and the depth of the groove 21 corresponding to the knife-lifting position 211 is H3, then the condition is satisfied: H1 <H3,H2<H3。
[0041] It can be understood that in the light guide plate 100 proposed in the utility model, a groove 21 is provided on the light emitting surface 20 of the light guide plate 100, and the depth of the groove 21 near the light incident surface 10 is less than the depth of the groove 21 corresponding to the knife lifting position 211, and the depth of the groove 21 near the tail 30 is less than the depth of the groove 21 corresponding to the knife lifting position 211; in this way, after the light enters the light guide plate 100 from the light incident surface 10, the light can be intercepted by the deeper knife lifting position 211, which can improve the utilization rate of the light and reduce the intensity of the light at the tail 30 of the light guide plate 100, thereby improving the undesirable phenomenon of bright lines and bright edges appearing at the tail 30 of the light guide plate 100 away from the light incident surface 10, thereby improving the subjective visual effect.
[0042] In addition, since the light intensity at the tail 30 of the light guide plate 100 is reduced, the use of a narrower frame 300 can also prevent light leakage, so the frame 300 can be made narrower, or even a frameless 300 design can be achieved, which can increase the screen-to-body ratio of the entire display; and, when some structures permit (such as when the coverage area of the frame 300 is relatively large), the side sticker of the tail 30 of the light guide plate 100 can be directly omitted, which can reduce costs.
[0043] In actual application, the groove 21 may be a substantially V-shaped groove 21 , an arc-shaped groove 21 , or a rectangular groove 21 , which is not specifically limited here.
[0044] In some embodiments, in conjunction with Figures 2 to 4 The groove 21 may be a V-shaped groove 21. Specifically, a V-shaped groove 21 (V-CUT) may be formed on the light-emitting surface 20 of the light guide plate 100 by using a knife-lifting process. That is, the width of the groove 21 gradually increases from the bottom of the groove to the groove opening. With the design of the V-shaped groove 21, the groove wall of the V-shaped groove 21 can re-refract the scattered light to form light emission perpendicular to the light-emitting surface 20 of the light guide plate 100, thereby enhancing the brightness in the vertical direction and further improving the utilization rate of light.
[0045] It should be noted that the preparation process of the light guide plate 100 is to use optical-grade acrylic or polycarbonate sheets, and then use high-tech materials with extremely high refractive index and non-light absorption to print light guide points on the bottom surface of the optical-grade sheet using laser engraving, V-shaped cross grid engraving, and UV screen printing technology. When developing the V-CUT master, the microstructure needs to be processed by precision machining machinery first. After the finished product is cut, it can be hot-pressed to transfer the required V-groove 21 structure to the light-emitting surface 20 of the light guide plate 100. Of course, if the injection molding process is used, the principle is the same. The required microstructure needs to be processed on the mold first, and then the plastic injection molding process is carried out. After natural demolding, the required V-groove 21 structure can be transferred to the light-emitting surface 20 of the light guide plate 100.
[0046] In some embodiments, in conjunction with Figures 2 to 4 , the direction from the light incident surface 10 to the tail portion 30 is defined as the first direction a, the light guide plate 100 has a second direction b set at an angle to the first direction a, and a plurality of grooves 21 are provided, and the plurality of grooves 21 are arranged at intervals along the second direction b. In this way, the intensity of light in the entire row of tail portions 30 of the light guide plate 100 can be reduced, thereby improving the undesirable phenomenon of bright lines and bright edges appearing in the entire row of tail portions 30 of the light guide plate 100 away from the light incident surface 10, thereby improving the subjective visual effect.
[0047] Specifically, the shapes and sizes of the plurality of grooves 21 may be the same or different. For example, the plurality of grooves 21 may be V-shaped grooves 21 of the same or different sizes, or may be arc-shaped grooves 21 of the same or different sizes, which may be adjusted according to actual display requirements.
[0048] In actual application, the depth of the groove 21 corresponding to the knife lifting position 211 can be the deepest position of the groove 21, or it may not be the deepest position of the groove 21, as long as the depth of the groove 21 corresponding to the knife lifting position 211 is greater than the depth of the groove 21 close to the light incident surface 10 and the depth close to the tail 30.
[0049] In actual application, the depth change of the groove 21 can be designed to be gradual, sudden, or irregular.
[0050] In actual application, the knife lifting position 211 corresponding to the groove 21 can be located in the middle of the groove 21, between the middle of the groove 21 and the light incident surface 10, or between the middle of the groove 21 and the tail 30.
[0051] Optionally, see Figure 1 , Figure 4 In one embodiment of the light guide plate 100 of the present invention, the depth of the groove 21 corresponding to the knife lifting position 211 is the deepest.
[0052] By configuring in this way, the depth of the groove 21 corresponding to the position of the lifting knife is the deepest. After the light enters the light guide plate 100 from the light incident surface 10, the light can be more effectively intercepted by the lifting knife position 211 with the deepest depth, so as to further improve the utilization rate of the light, and at the same time, can better reduce the intensity of the light at the tail 30 of the light guide plate 100.
[0053] In actual application, the depth of the groove 21 along the light incident surface 10 to the knife lifting position 211 can gradually become deeper, or it can first become shallower and then become deeper, or it can first become deeper and then become shallower and finally become deeper; and the depth of the groove 21 along the knife lifting position 211 to the tail 30 can gradually become shallower, or it can first become shallower and then become deeper, or it can first become shallower and then become deeper and finally become shallower, as long as the depth of the groove 21 corresponding to the knife lifting position 211 is the deepest.
[0054] Optionally, see Figure 1 In one embodiment of the light guide plate 100 of the present invention, the depth of the groove 21 from the light incident surface 10 to the knife lifting position 211 gradually becomes deeper, and the depth of the groove 21 from the knife lifting position 211 to the tail 30 gradually becomes shallower.
[0055] With such an arrangement, the depth of the groove 21 can be gradually changed from shallow to deep and then from deep to shallow, which can make the light refracted by the groove 21 more evenly distributed and improve the uniformity of the light output.
[0056] In actual application, the depth of the groove 21 near the light incident surface 10 may be the same as or different from the depth near the tail portion 30. For example, the depth H1 of the groove 21 near the light incident surface 10 may be greater than the depth H2 of the groove 21 near the tail portion 30, or the depth H1 of the groove 21 near the light incident surface 10 may be less than the depth H2 of the groove 21 near the tail portion 30.
[0057] As some exemplary examples, the depth H1 of the groove 21 near the light incident surface 10 may be less than 2 μm, for example, 2 μm, 1.8 μm, 1.5 μm, 1.3 μm, 1.1 μm, etc.
[0058] Furthermore, the depth H2 of the trench 21 near the tail portion 30 may be less than 3 μm, for example, 3 μm, 2.8 μm, 2.5 μm, 2.3 μm, 2.1 μm, etc.
[0059] Furthermore, the depth H3 of the groove 21 near the knife-lifting position 211 can be 12 μm to 15 μm, for example, 12 μm, 13 μm, 14 μm, 15 μm, etc. In this configuration, when the depth H3 of the groove 21 near the knife-lifting position 211 is too small, the effect of intercepting the light receiving light at the knife-lifting position 211 will be affected, and when the depth H3 of the groove 21 near the knife-lifting position 211 is too large, a thicker light guide plate 100 needs to be provided, resulting in increased costs.
[0060] Optionally, see Figure 1 In one embodiment of the light guide plate 100 of the present invention, in the direction from the light incident surface 10 to the tail portion 30 , the knife lifting position 211 is located at 2 / 3 of the distance from the light incident surface 10 to the tail portion 30 .
[0061] With such a configuration, when the knife-lifting position 211 is too far forward (too close to the light incident surface 10), the tail 30 of the light guide plate 100 will have a low brightness in the entire row of the tail 30 due to insufficient light; and when the knife-lifting position 211 is too far back (too close to the tail 30), the distance between the knife-lifting position 211 and the tail 30 is insufficient, so that part of the light will not have time to refract and will be directly emitted from the horizontal direction of the tail 30, which fails to achieve the effect of reducing the intensity of the light at the tail 30 of the light guide plate 100, and fails to effectively improve the undesirable phenomenon of bright lines and bright edges appearing at the tail 30 of the light guide plate 100 away from the light incident surface 10. Therefore, by making the knife-lifting position 211 located at 2 / 3 of the distance from the light incident surface 10 to the tail 30, it is possible to effectively improve the undesirable phenomenon of bright lines and bright edges appearing at the tail 30 of the light guide plate 100 away from the light incident surface 10 on the basis of avoiding the low brightness of the entire row of the tail 30.
[0062] Optionally, in one embodiment of the light guide plate 100 of the present invention, the groove wall of the groove 21 is provided with a dot structure (not shown), and the density of the dot structure near the light incident surface 10 and the density near the tail 30 are both smaller than the density of the dot structure near the knife lifting position 211.
[0063] With such arrangement, when light enters the light guide plate 100 from the light incident surface 10 and passes through the groove wall of the groove 21, it can be reflected or refracted at the critical surface between the dot structure and the outside world, so as to fully disperse the light evenly, thereby improving the uniformity of the light output; in addition, by making the density of the dot structure near the light incident surface 10 and the density near the tail 30 smaller than the density of the dot structure near the knife lifting position 211, when the light passes through the knife lifting position with a denser dot structure, the conversion efficiency of the light can also be improved by the setting of the dot structure, so that the light that finally reaches the edge of the tail 30 is reduced, thereby achieving the purpose of preventing bright lines and bright edges at the tail 30. Therefore, the overall density distribution of the dot structure needs to complement the depth distribution of the groove 21, so as to better improve the undesirable phenomenon of bright lines and bright edges appearing at the tail 30 of the light guide plate 100 away from the light incident surface 10, so as to improve the subjective visual effect.
[0064] In actual application, the mesh point structure may be provided on only one groove wall of the groove 21 , or may be provided on all groove walls of the groove 21 .
[0065] Optionally, the mesh dot structure may be a convex, concave, or uneven structure, and the cross section of the mesh dot structure may be a circular, prismatic, or other shape.
[0066] In actual application, the density of the dot structure near the knife lifting position 211 can be the position with the highest density of the dot structure, or it can be not the position with the highest density of the dot structure, as long as the density of the dot structure near the knife lifting position 211 is greater than the density of the dot structure near the light incident surface 10 and the density near the tail 30.
[0067] Optionally, in an embodiment of the light guide plate 100 of the present invention, the density of the dot structure is the highest near the blade lifting position 211. In this configuration, since the depth of the groove 21 corresponding to the blade lifting position 211 is the deepest, the density of the dot structure near the blade lifting position 211 is designed to be the highest, which can further improve the light conversion rate and better achieve the purpose of preventing bright lines and bright edges of the tail 30.
[0068] As some examples, the ratio between the density of the dot structure at the corresponding light incident surface 10 and the density at the corresponding knife lifting position 211 may be 1:(3-8), for example, the density of the dot structure at the corresponding knife lifting position 211 is 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, etc. of the density of the dot structure at the corresponding light incident surface 10. In addition, the ratio between the density of the dot structure at the corresponding tail 30 and the density at the corresponding knife lifting position 211 may also be 1:(3-8), for example, the density of the dot structure at the corresponding knife lifting position 211 is 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, etc. of the density of the dot structure at the corresponding tail 30. With such a configuration, when the density of the dot structure corresponding to the knife lifting position 211 is too small, the light cannot be effectively captured, resulting in most of the light reaching the tail; and when the density of the dot structure corresponding to the knife lifting position 211 is too large, most of the light will not be diffusely reflected and cannot pass through the dot structure, resulting in most of the light disappearing and being slowed down by the dense dot area, which also fails to effectively capture the light, resulting in most of the light reaching the tail.
[0069] Optionally, see Figure 3 In one embodiment of the light guide plate 100 of the present invention, the light guide plate 100 further has a reflective surface 40 disposed opposite to the light emitting surface 20 , and the reflective surface 40 is provided with dots 41 .
[0070] In this way, by setting the dots 41 on the reflective surface 40, the light emitted by the light strip 500 (light source) can be refracted and utilized as much as possible after entering the light guide plate 100 through the cooperation of the grooves 21 and the dots 41 before reaching the tail 30, thereby reducing the light emitted in the horizontal direction from the tail 30, further improving the utilization rate of the light, and better improving the undesirable phenomenon of bright lines and bright edges appearing at the tail 30.
[0071] It should be noted that, in the process of preparing the light guide plate 100 , actual assembly confirmation needs to be performed, and the grooves 21 need to be adjusted to match the mesh dots 41 to fully reduce light leakage from the tail portion 30 .
[0072] Optionally, the mesh dots 41 may be a convex, concave, or uneven structure, and the cross section of the mesh dots 41 may be a circular, prismatic, or other shape.
[0073] Optionally, see Figure 3 In one embodiment of the light guide plate 100 of the present invention, the density of the dots 41 near the light incident surface 10 and the density near the tail 30 are both smaller than the density of the dots 41 near the knife lifting position 211 .
[0074] With such a configuration, the adjustment of the dots 41 is mainly based on the depth range of the groove 21, and different densities of the dots 41 are arranged. Since the depth of the groove 21 corresponding to the knife-lifting position 211 toward the tail 30 will gradually become shallower, the refraction effect will be reduced. Therefore, by making the density of the dots 41 close to the knife-lifting position 211 larger, the light conversion efficiency can be improved, and it is also to reduce the light that finally reaches the edge of the tail 30, so as to achieve the purpose of preventing bright lines and bright edges at the tail 30. Therefore, the overall density distribution of the dots 41 needs to complement the depth distribution of the groove 21, so as to better improve the undesirable phenomenon of bright lines and bright edges appearing at the tail 30 of the light guide plate 100 away from the light incident surface 10, so as to improve the subjective visual effect.
[0075] In actual application, the density of the dots 41 near the knife lifting position 211 can be the position with the highest density of the dots 41, or it can be other than the position with the highest density of the dots 41, as long as the density of the dots 41 near the knife lifting position 211 is greater than the density of the dots 41 near the light incident surface 10 and the density near the tail 30.
[0076] Optionally, see Figure 3 In one embodiment of the light guide plate 100 of the present invention, the density of the dots 41 is the highest near the knife lifting position 211 .
[0077] With such arrangement, since the depth of the groove 21 corresponding to the knife lifting position 211 is the deepest, the density of the dots 41 close to the knife lifting position 211 is designed to be the largest, which can further improve the light conversion rate and better achieve the purpose of preventing bright lines and bright edges of the tail 30.
[0078] Optionally, the density of the dots 41 can gradually increase along the direction from the light incident surface 10 to the knife lifting position 211, or it can first decrease and then increase, or it can first increase and then decrease and finally increase; and the density of the dots 41 can gradually decrease along the direction from the knife lifting position 211 to the tail 30, or it can first decrease and then increase, or it can first decrease and then increase and finally decrease, as long as the density of the dots 41 is the largest near the knife lifting position 211.
[0079] In actual application, the density of the dots 41 at the corresponding light incident surface 10 may be the same as or different from the density of the corresponding tail portion 30. For example, the density of the dots 41 at the corresponding light incident surface 10 may be greater than the density of the dots 41 at the corresponding tail portion 30, or the density of the dots 41 at the corresponding light incident surface 10 may be less than the density of the dots 41 at the corresponding tail portion 30.
[0080] As some examples, the ratio between the density of the dots 41 at the corresponding light incident surface 10 and the density at the corresponding knife lifting position 211 may be 1:(3-8), for example, the density of the dots 41 at the corresponding knife lifting position 211 is 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, etc. the density of the dots 41 at the corresponding light incident surface 10. In addition, the ratio between the density of the dots 41 at the corresponding tail 30 and the density of the corresponding knife lifting position 211 may also be 1:(3-8), for example, the density of the dots 41 at the corresponding knife lifting position 211 is 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, etc. the density of the dots 41 at the corresponding tail 30. With such a configuration, when the density of the dots 41 corresponding to the knife-lifting position 211 is too small, the light cannot be effectively captured, causing most of the light to reach the tail; and when the density of the dots 41 corresponding to the knife-lifting position 211 is too large, most of the light will not be diffusely reflected and cannot pass through the dots 41, causing most of the light to disappear and be slowed down by the dense dot area, which also makes it impossible to effectively capture the light, causing most of the light to reach the tail.
[0081] Combined with reference Figure 5 The utility model further proposes a backlight module 1000, which includes a back panel 200, a frame 300, a reflective sheet 400, a light bar 500, an optical film 600 and the light guide plate 100 as described above. The specific structure of the light guide plate 100 refers to the above embodiment. Since the backlight module 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0082] Among them, the frame 300 is arranged around the edge of the back panel 200, and is surrounded with the back panel 200 to form a mounting groove; the reflective sheet 400 is arranged in the mounting groove; the light guide plate 100 is arranged in the mounting groove, and is located on the side of the reflective sheet 400 away from the back panel 200; the light bar 500 is arranged in the mounting groove, and is arranged on the inner wall of the frame 300 close to the light incident surface 10 of the light guide plate 100; the optical film 600 is arranged in the mounting groove, and is located on the side of the light guide plate 100 away from the reflective sheet 400.
[0083] In some embodiments, the backlight module 1000 further includes a face frame 700 , and the face frame 700 is disposed on the front surface of the frame 300 .
[0084] Combined with reference Figure 6 The utility model also proposes a display 1, which includes a display panel 2000 and the backlight module 1000 as described above. The specific structure of the backlight module 1000 refers to the above embodiment. Since the display 1 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the display panel 2000 is arranged on the light-emitting side of the backlight module 1000, that is, the display panel 2000 is arranged on the side of the optical film 600 away from the light guide plate 100.
[0085] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A light guide plate, characterized in that: The light guide plate has a light incident surface, a light emitting surface adjacent to the light incident surface, and a tail portion away from the light incident surface, the light emitting surface is provided with a groove, and the groove is extended from the light incident surface to the tail portion; The groove is defined as having a knife-lifting position between the light-entering surface and the tail portion, the depth of the groove close to the light-entering surface is H1, the depth of the groove close to the tail portion is H2, and the depth of the groove corresponding to the knife-lifting position is H3, then the condition is satisfied: H1 <H3,H2<H3。 2. The light guide plate according to claim 1, wherein: The depth of the groove corresponding to the knife lifting position is the deepest.
3. The light guide plate according to claim 2, wherein: The depth of the groove from the light incident surface to the knife lifting position gradually becomes deeper, and the depth of the groove from the knife lifting position to the tail portion gradually becomes shallower; And / or, in the direction from the light incident surface to the tail, the knife lifting position is located at 2 / 3 of the distance from the light incident surface to the tail.
4. The light guide plate according to any one of claims 1 to 3, characterized in that: The groove wall of the groove is provided with a dot structure, and the density of the dot structure near the light incident surface and the density near the tail are both smaller than the density of the dot structure near the knife lifting position.
5. The light guide plate according to any one of claims 1 to 3, characterized in that: The light guide plate further comprises a light reflecting surface arranged opposite to the light emitting surface, and the light reflecting surface is provided with dots.
6. The light guide plate according to claim 5, characterized in that: The density of the dots near the light incident surface and the density near the tail are both smaller than the density of the dots near the knife lifting position.
7. The light guide plate according to claim 6, wherein: The density of the network points is the highest near the knife lifting position.
8. The light guide plate according to any one of claims 1 to 3, characterized in that: The groove is a V-shaped groove; And / or, the direction from the light incident surface to the tail is defined as a first direction, the light guide plate has a second direction set at an angle to the first direction, a plurality of grooves are provided, and the plurality of grooves are spaced apart along the second direction.
9. A backlight module, characterized in that: include: Back panel; A frame, the frame is arranged around the edge of the back plate and is combined with the back plate to form a mounting groove; A reflective sheet, the reflective sheet is arranged in the mounting groove; The light guide plate according to any one of claims 1 to 8, wherein the light guide plate is arranged in the mounting groove and is located on a side of the reflective sheet away from the back plate; A light bar, the light bar being arranged in the mounting groove and arranged on the inner wall of the frame close to the light incident surface of the light guide plate; The optical film is arranged in the mounting groove and is located on a side of the light guide plate away from the reflective sheet.
10. A display, characterized in that: It comprises a display panel and the backlight module as claimed in claim 9, wherein the display panel is arranged on the light emitting side of the backlight module.