Backlight module and electronic equipment

Abstract

The utility model discloses a backlight module and electronic equipment, and belongs to the technical field of display. A backlight module comprises a frame body, a light guide plate, a lateral light source and a first flexible circuit board. Due to the fact that the bottom plate in the frame body is provided with the leading-out opening communicated with the installation groove, the first flexible circuit board connected with the light source can be distributed on the back face of the backlight module without being bent after extending out of the leading-out opening, and it is guaranteed that the part, extending out of the leading-out opening, of the first flexible circuit board can be normally connected into the control assembly. Thus, it can be guaranteed that no rebound force exists in the first flexible circuit board, the light source connected with the first flexible circuit board is not prone to warping, then it can be guaranteed that light rays emitted by the light source can basically and completely enter the light guide plate, and it is guaranteed that the probability that the backlight module leaks light is low; therefore, the display effect of the electronic equipment integrated with the backlight module is good.

Description

Technical Field

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

[0002] At present, electronic devices have become an indispensable electronic product in people's lives. Various electronic devices such as medical display devices, mobile phones, tablet computers and laptops have greatly increased the convenience of people's lives.

[0003] Generally, a backlight module in an electronic device usually includes: a light guide plate, a light bar arranged on the light incident surface of the light guide plate, and a flexible circuit board for driving the light bar to emit light.

[0004] However, current backlight modules are prone to light leakage, resulting in poor display effects of electronic devices integrated with such backlight modules. Utility Model Content

[0005] The embodiment of the present application provides a backlight module and an electronic device, which can solve the problem of poor display effect of electronic devices. The technical solution is as follows:

[0006] In one aspect, a backlight module is provided, comprising:

[0007] A frame, a light guide plate, an edge-entry light source and a first flexible circuit board;

[0008] The frame includes: a bottom plate, and an annular side plate fixedly connected to the edge of the bottom plate, the side plate and the bottom plate are used to enclose a mounting groove, and the bottom plate has a lead-out opening communicated with the mounting groove;

[0009] The light guide plate and the light source are both located in the mounting groove, and the light emitting surface of the light source faces the side surface of the light guide plate;

[0010] A portion of the first flexible circuit board is located in the mounting groove and connected to the light source, and another portion of the first flexible circuit board extends out of the mounting groove through the lead-out opening.

[0011] Optionally, the orthographic projection of the outlet opening on a reference plane parallel to the light guide plate is located within the orthographic projection of the light guide plate on the reference plane.

[0012] Optionally, the first flexible circuit board includes: a first sub-portion and a second sub-portion, the first sub-portion and the second sub-portion are both in strip shape, and the overall extension direction of the first sub-portion intersects with the overall extension direction of the second sub-portion, the first sub-portion is located in the mounting groove and connected to the light source, the end of the second sub-portion is fixedly connected to the first sub-portion, and the second sub-portion extends out of the mounting groove through the lead-out opening;

[0013] Wherein, in the overall extension direction of the second sub-portion, the outlet opening is distributed between the first sub-portion and the portion of the second sub-portion extending from the outlet opening.

[0014] Optionally, the backlight module further includes: a first sealing strip and a second sealing strip located outside the mounting groove and distributed at the outlet opening, wherein in the overall extension direction of the second sub-portion, the first sealing strip and the second sealing strip are respectively distributed on both sides of the outlet opening;

[0015] Part of the first sealing strip is connected to the frame, and another part extends into the outlet opening and is connected to a side of the second sub-portion away from the light guide plate; part of the second sealing strip is connected to the frame, and another part extends into the outlet opening and is connected to a side of the second sub-portion close to the light guide plate.

[0016] Optionally, an orthographic projection of the first sealing strip on the reference plane and an orthographic projection of the second sealing strip on the reference plane have an overlapping area.

[0017] Optionally, the first sub-part includes: a main body part connected to the light source, and a fixing part connected to the main body part, and the second sub-part is fixedly connected to a side of the fixing part away from the main body part;

[0018] The backlight module further includes: a first adhesive layer located between the fixing portion and the light guide plate, wherein two oppositely disposed surfaces of the first adhesive layer are respectively bonded to the fixing portion and the light guide plate.

[0019] Optionally, the backlight module further comprises: a guide bar detachably connected to an end of the second sub-part facing away from the first sub-part.

[0020] Optionally, a width of the guide strip at one end facing the second sub-portion is less than or equal to a width of the second sub-portion at one end facing away from the first sub-portion.

[0021] Optionally, the width of the guide strip gradually decreases in a direction away from the second sub-portion.

[0022] On the other hand, an electronic device is provided, comprising: any one of the backlight modules described above, and a liquid crystal display panel located on the light emitting side of the backlight module.

[0023] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0024] A backlight module includes: a frame, a light guide plate, a side-entry light source and a first flexible circuit board. Since the bottom plate in the frame has an outlet opening connected to the mounting groove, the first flexible circuit board connected to the light source can be distributed on the back of the backlight module without bending after extending through the outlet opening, so as to ensure that the part of the first flexible circuit board extending from the outlet opening can be normally connected to the control component. In this way, it can be ensured that there is no rebound force in the first flexible circuit board, so that the light source connected to the first flexible circuit board is not prone to warping, and further, it can be ensured that the light emitted by the light source can basically all be shot into the light guide plate, so as to ensure that the probability of light leakage in the backlight module is low, so that the display effect of the electronic device integrated with the backlight module is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a cross-sectional schematic diagram of a backlight module provided by the related technology;

[0027] Figure 2 is a back view of a backlight module provided in an embodiment of the present application;

[0028] Figure 3 is a cross-sectional schematic diagram of a backlight module provided in an embodiment of the present application;

[0029] Figure 4 is a cross-sectional schematic diagram of another backlight module provided in an embodiment of the present application;

[0030] Figure 5 is a top view of a first flexible circuit board provided in an embodiment of the present application;

[0031] Figure 6 is a cross-sectional schematic diagram of another backlight module provided in an embodiment of the present application;

[0032] Figure 7 is a top view of another first flexible circuit board provided in an embodiment of the present application;

[0033] Figure 8 It is a schematic diagram of a membrane layer structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0035] Please refer to Figure 1 , Figure 1 The backlight module 00 may include: a frame 01 , a light guide plate 02 , an edge-type light source 03 and a flexible circuit board 04 .

[0036] The light guide plate 02 and the side-entry light source 03 in the backlight module 00 can be located in the frame 01, and the light emitting surface of the light source 03 can face the side of the light guide plate 02. The side of the frame 01 has an outlet K, and a part of the flexible circuit board 04 in the backlight module 00 can be located in the frame 01 and connected to the light source 03, and the other part of the flexible circuit board 04 can extend out of the frame 01 through the outlet K. The part of the flexible circuit board 04 extending from the outlet K needs to be bent 180 degrees to ensure that the part of the flexible circuit board 04 extending from the outlet K is distributed on the back of the backlight module 00, so as to ensure that the flexible circuit board 04 can be normally connected to the control component set on the back of the backlight module 00 later.

[0037] However, after the flexible circuit board 04 is bent 180 degrees, the bent portion of the flexible circuit board 04 has a certain rebound force. Under the action of the rebound force, the light source 03 connected to the flexible circuit board 04 is very likely to warp, resulting in a portion of the light emitted from the light source 03 being unable to enter the light guide plate 02, which in turn causes the backlight module 00 to easily leak light.

[0038] Please refer to Figure 2 and Figure 3 , Figure 2 is a back view of a backlight module provided in an embodiment of the present application. Figure 3 The backlight module 000 may include: a frame 100 , a light guide plate 200 , an edge-type light source 300 , and a first flexible circuit board 400 .

[0039] The frame 100 in the backlight module 000 may include: a bottom plate 101, and an annular side plate 102 fixedly connected to the edge of the bottom plate 101. Here, the side plate 102 in the frame 100 may be used to enclose the installation groove U with the bottom plate 101, and the bottom plate 101 in the frame 100 may have an outlet opening 101a connected to the installation groove U.

[0040] The light guide plate 200 and the light source 300 in the backlight module 000 can both be located in the mounting groove U, and the light emitting surface of the light source 300 can face the side of the light guide plate 200. Here, the light source 300 in the backlight module 000 can be a light bar, and the light source 300 can include a plurality of light-emitting diodes (LED) lamp beads, and the light emitting surfaces of these LED lamp beads can all face the light guide plate 200. To this end, the light emitted from the light emitting surface of the light source 300 can be emitted from the side of the light guide plate 200 into the interior of the light guide plate 200, and the light entering the interior of the light guide plate 200 can be guided by the light guide plate 200 to the front of the light guide plate 200 and then emitted, and the front of the light guide plate 200 is the light emitting side of the backlight module 000. Subsequently, after the liquid crystal display panel is disposed on the light-emitting side of the backlight module 000 , the light emitted by the backlight module 000 can be directed toward the liquid crystal display panel, so that the liquid crystal display panel can display images normally.

[0041] A portion of the first flexible circuit board 400 in the backlight module 000 may be located in the mounting groove U and connected to the light source 300, and another portion of the first flexible circuit board 400 may extend out of the mounting groove U through the lead-out opening 101a. It should be noted that the end of the portion of the first flexible circuit board 400 extending through the lead-out opening 101a is used to be electrically connected to the control component distributed on the back of the backlight module 000, and the first flexible circuit board 400 is integrated with a signal trace. For this purpose, the control component can send a driving signal to the light source 300 through the signal trace integrated inside the first flexible circuit board 400, so that the light source 300 can emit light outward. Here, the control component may be a main board or a sub-board in an electronic device.

[0042] In this case, since the bottom plate 101 in the frame 100 has an outlet opening 101a connected to the mounting groove U, the first flexible circuit board 400 connected to the light source 300 can be distributed on the back of the backlight module 000 without bending after extending through the outlet opening 101a, so as to ensure that the portion of the first flexible circuit board 400 extending from the outlet opening 101a can be normally connected to the control component. In this way, it can be ensured that there is no rebound force in the first flexible circuit board 400, so that the light source 300 connected to the first flexible circuit board 400 is not prone to warping, and further, it can be ensured that the light emitted by the light source 300 can basically be injected into the light guide plate 200, so as to ensure that the probability of light leakage in the backlight module 000 is low, so that the display effect of the electronic device integrated with such a backlight module 000 is better.

[0043] In summary, a backlight module provided by an embodiment of the present application includes: a frame, a light guide plate, a side-entry light source, and a first flexible circuit board. Since the bottom plate in the frame has an outlet opening connected to the mounting groove, the first flexible circuit board connected to the light source can be distributed on the back of the backlight module without bending after extending through the outlet opening, so as to ensure that the portion of the first flexible circuit board extending from the outlet opening can be normally connected to the control component. In this way, it can be ensured that there is no rebound force in the first flexible circuit board, so that the light source connected to the first flexible circuit board is not prone to warping, and further, it can be ensured that the light emitted by the light source can basically all be shot into the light guide plate, so as to ensure that the probability of light leakage in the backlight module is low, so that the display effect of the electronic device integrated with such a backlight module is better.

[0044] In the embodiments of the present application, Figure 3 As shown, in the backlight module 000, the orthographic projection of the outlet opening 101a provided on the bottom plate 101 on the reference plane can be located within the orthographic projection of the light guide plate 200 on the reference plane. Here, the reference plane refers to a plane parallel to the light guide plate 200, for example, the reference plane can be the plane where the front side of the light guide plate 200 is located, or can be the plane where the back side of the light guide plate 200 is located.

[0045] In this case, it can be ensured that after the first flexible circuit board 400 in the backlight module 000 extends out through the outlet opening 101a, it can be distributed on the side of the bottom plate 101 in the frame 100 away from the light guide plate 200 without being bent, so that the first flexible circuit board 400 extending out of the outlet opening 101a can be distributed on the back side of the backlight module 000 to facilitate its subsequent connection to the control component.

[0046] In this application, please refer to Figure 4 and Figure 5 , Figure 4 is a cross-sectional schematic diagram of another backlight module provided in an embodiment of the present application, Figure 5 4 is a top view of a first flexible circuit board provided in an embodiment of the present application. The first flexible circuit board 400 in the backlight module 000 may include: a first sub-portion 401 and a second sub-portion 402. The first sub-portion 401 and the second sub-portion 402 may both be strip-shaped, and the overall extension direction of the first sub-portion 401 may intersect with the overall extension direction of the second sub-portion 402. For example, the overall extension direction of the first sub-portion 401 may be perpendicular to the overall extension direction of the second sub-portion 402.

[0047] Here, the first sub-portion 401 in the first flexible circuit board 400 can be located in the mounting groove U and connected to the light source 300, the end of the second sub-portion 402 in the first flexible circuit board 400 can be fixedly connected to the first sub-portion 401, and the second sub-portion 402 can extend out of the mounting groove U through the outlet opening 101a.

[0048] In this application, if Figure 4 As shown, after the second sub-portion 402 in the first flexible circuit board 400 extends out of the mounting groove U through the lead-out opening 101a, in the overall extension direction of the second sub-portion 402 in the first flexible circuit board 400, the lead-out opening 101a provided on the bottom plate 101 in the frame 100 can be distributed between the first sub-portion 401 in the first flexible circuit board 400 and the portion of the second sub-portion 402 extending from the lead-out opening 101a. In this way, it can be ensured that after the second sub-portion 402 in the first flexible circuit board 400 extends out from the lead-out opening 101a, it can be distributed on the side of the bottom plate 101 in the frame 100 away from the light guide plate 200, so as to ensure that the end of the second sub-portion 402 in the first flexible circuit board 400 away from the first sub-portion 401 can be normally connected to the control component.

[0049] It should be noted that after the second sub-portion 402 in the first flexible circuit board 400 extends out of the mounting groove U through the outlet opening 101a, there is only a small bend in the second sub-portion 402 at the outlet opening 101a, but the second sub-portion 402 does not bend 180 degrees. Therefore, there is no rebound force in the second sub-portion 402 in the first flexible circuit board 400.

[0050] Optionally, in a direction perpendicular to the overall extension of the second sub-portion 402, the width of the lead-out opening 101a provided on the bottom plate 101 in the frame 100 may be greater than the width of the second sub-portion 402 in the first flexible circuit board 400, thereby ensuring that the second sub-portion 402 can be more easily extended out of the mounting groove U through the lead-out opening 101a.

[0051] In the examples of this application, please refer to Figure 4 The backlight module 000 may further include: a first sealing strip 500 and a second sealing strip 600 located outside the mounting groove U and distributed at the outlet opening 101a. In the overall extension direction of the second sub-portion 402 in the first flexible circuit board 400, the first sealing strip 500 and the second sealing strip 600 in the backlight module 000 may be distributed on both sides of the outlet opening 101a, respectively, and the first sealing strip 500 may be closer to the first sub-portion 401 in the first flexible circuit board 400 than the second sealing strip 600.

[0052] Part of the first sealing strip 500 may be connected to the bottom plate 101 in the frame 100, and another part of the first sealing strip 500 may extend into the outlet opening 101a and be connected to the side of the second sub-portion 402 in the first flexible circuit board 400 away from the light guide plate 200. Part of the second sealing strip 600 may be connected to the bottom plate 101 in the frame 100, and another part of the second sealing strip 600 may extend into the outlet opening 101a and be connected to the side of the second sub-portion 402 in the first flexible circuit board 400 close to the light guide plate 200.

[0053] In this case, by setting the first sealing strip 500 and the second sealing strip 600 at the outlet opening 101a of the frame body 100, it is possible to ensure that the first sealing strip 500 and the second sealing strip 600 seal the outlet opening 101a of the frame body 100 while ensuring that the second sub-portion 402 in the first flexible circuit board 400 can extend normally from the outlet opening 101a.

[0054] Exemplarily, the materials of the first sealing strip 500 and the second sealing strip 600 can use organic flexible materials with adhesive properties. For example, the first sealing strip 500 and the second sealing strip 600 can both be sealing Mylar. In this way, after the second sub-portion 402 in the first flexible circuit board 400 extends out from the outlet opening 101a, the first sealing strip 500 can be bonded to the position of the bottom plate 101 close to one side of the outlet opening 101a, and the first sealing strip 500 can also extend into the outlet opening 101a to bond with the portion of the second sub-portion 402 distributed in the outlet opening 101a. In addition, the second sealing strip 600 can be bonded to the position of the bottom plate 101 close to the other side of the outlet opening 101a, and the second sealing strip 600 can also extend into the outlet opening 101a to bond with the portion of the second sub-portion 402 distributed in the outlet opening 101a. In this way, after the second sub-portion 402 in the first flexible circuit board 400 extends out from the outlet opening 101a, the first sealing strip 500 and the second sealing strip 600 can be adhered to the bottom plate 100, so that the first sealing strip 500 and the second sealing strip 600 do not affect the normal extension of the second sub-portion 402 in the first flexible circuit board 400, and the first sealing strip 500 and the second sealing strip 600 can be bonded and matched to seal the outlet opening 101a to ensure that the probability of dust and moisture in the external environment invading from the outlet opening 101a to the interior of the backlight module 000 is low.

[0055] In the embodiment of the present application, the orthographic projection of the first sealing strip 500 on the reference plane may overlap with the orthographic projection of the second sealing strip 600 on the reference plane. In this way, the outlet opening 101a provided on the bottom plate 101 in the frame 100 may be completely covered by the first sealing strip 500 and the second sealing strip 600, which may further improve the sealing effect of the first sealing strip 500 and the second sealing strip 600 on the outlet opening 101a, thereby further reducing the probability of dust and moisture in the external environment invading the interior of the backlight module 000 from the outlet opening 101a.

[0056] In the examples of this application, please refer to Figure 6 and Figure 7 , Figure 6 is a cross-sectional schematic diagram of another backlight module provided in an embodiment of the present application, Figure 7 4 is a top view of another first flexible circuit board provided in an embodiment of the present application. The first sub-portion 401 in the first flexible circuit board 400 may include: a main body portion 401a connected to the light source 300, and a fixing portion 401b connected to the main body portion 401a. The second sub-portion 402 in the first flexible circuit board 400 may be fixedly connected to a side of the fixing portion 401b away from the main body portion 401a.

[0057] Here, if Figure 6 As shown, the backlight module 000 may further include: a first adhesive layer 700 located between the fixing portion 401b in the first sub-portion 401 and the light guide plate 200, and two oppositely disposed surfaces of the first adhesive layer 700 may be respectively bonded to the fixing portion 401b in the first sub-portion 401 and the light guide plate 200. In this way, the first flexible circuit board 400 may be fixed to the back side of the light guide plate 200 through the first adhesive layer 700, so as to ensure that the first flexible circuit board 400 is arranged in the mounting groove U of the frame 100 with high stability.

[0058] In the examples of this application, please refer to Figure 7 The backlight module 000 may further include: a guide bar 800 detachably connected to an end of the second sub-part 402 of the first flexible circuit board 400 away from the first sub-part 401. Here, the guide bar 800 is made of a flexible material, which is relatively soft and can be easily bent.

[0059] In the present application, during the assembly process of the first flexible circuit board 400, the first sub-part 401 in the first flexible circuit board 400 can be first assembled in the mounting groove U of the frame 100; then, the guide bar 800 can be connected to the end of the second sub-part 402 away from the first sub-part 401, and the end of the guide bar 800 away from the second sub-part 402 is extended from the lead-out opening 101a; thereafter, by pulling the end of the guide bar 800 away from the second sub-part 402, the second sub-part 402 can be driven to extend from the lead-out opening 101a to the outside of the mounting groove U; finally, the guide bar 800 can be removed from the end of the second sub-part 402 away from the first sub-part 401.

[0060] In this way, the guide bar 800 can more conveniently allow the second sub-part 402 in the first flexible circuit board 400 to pass through the outlet opening 101a, and the guide bar 800 and the second sub-part 402 are detachably connected. After the second sub-part 402 extends from the outlet opening 101a to the outside of the mounting groove U, the guide bar 800 can be removed from the second sub-part 402 in the first flexible circuit board 400 to ensure that the guide bar 800 does not affect the normal access of the second sub-part 402 in the first flexible circuit board 400 to the control component.

[0061] In this application, if Figure 7 As shown, the width of the guide strip 800 in the backlight module 000 toward the second subsection 402 in the first flexible circuit board 400 can be less than or equal to the width of the second subsection 402 in the first flexible circuit board 400 away from the first subsection 401 in the first flexible circuit board 400.

[0062] Here, in a direction perpendicular to the overall extension of the second sub-portion 402 , the width of the outlet opening 101 a provided on the bottom plate 101 in the frame 100 is greater than the width of the second sub-portion 402 in the first flexible circuit board 400 . Therefore, when the width of the guide bar 800 toward one end of the second sub-portion 402 in the first flexible circuit board 400 is less than or equal to the width of the second sub-portion 402 in the first flexible circuit board 400 away from the first sub-portion 401 in the first flexible circuit board 400, it can be ensured that the width of the guide bar 800 toward one end of the second sub-portion 402 in the first flexible circuit board 400 is less than the width of the lead-out opening 101a set on the bottom plate 101 in the frame 200, so that the guide bar 800 is easier to extend from the lead-out opening 101a, and in the process of pulling the guide bar 800, it can be ensured that the guide bar 800 is not in contact with the inner wall of the lead-out opening 101a, so that the guide bar 800 can more easily pull the second sub-portion 402 in the first flexible circuit board 400 out of the lead-out opening 101a to the outside of the mounting groove U.

[0063] Optionally, the width of the guide bar 800 in the backlight module 000 can be gradually reduced in the direction away from the second sub-portion 402 in the first flexible circuit board 400. In this case, it can be ensured that the width of the end of the guide bar 800 away from the second sub-portion 402 in the first flexible circuit board 400 is smaller, so that the end of the guide bar 800 away from the second sub-portion 402 is easier to extend from the outlet opening 101a. And the width of the guide bar 800 is gradually changed, which can ensure that in the process of pulling the guide bar 800, the guide bar 800 will not be stuck at the outlet opening 101a due to the sudden change of the width of the guide bar 800, so that the guide bar 800 can more stably pull the second sub-portion 402 out of the outlet opening 101a to the outside of the mounting groove U.

[0064] In the examples of this application, please refer to Figure 6 The backlight module 000 may further include: a reflective strip 900, a light absorbing strip 1000 and an optical film.

[0065] The reflective strip 900 may be located at a side of the frame 100 close to the light source 300, and the reflective strip 900 may be located between the optical film and the light guide plate 200. The reflective strip 900 and the optical film may be connected.

[0066] The light absorbing strip 1000 may be located on a side of the optical film away from the reflective strip 900. The light absorbing strip 1000 is disposed separately from the diffuser, that is, there is no bonding relationship between the light absorbing strip 1000 and the optical film.

[0067] For example, the optical film may include: a diffuser 1100 located on the light guide plate 200. In a possible implementation, the diffuser 1100 may be in contact with the light guide plate 200. The reflective strip 900 may be located between the diffuser 1100 and the light guide plate 200 in the optical film, and the reflective strip 900 and the diffuser 1100 may be connected by bonding. The light absorbing strip 1000 may be located on a side of the diffuser 1100 in the optical film away from the reflective strip 900, and the light absorbing strip 1000 is disposed separately from the diffuser 1100.

[0068] Optionally, the optical film may further include: a brightness enhancement sheet 1200 located on a side of the diffuser 1100 away from the light guide plate 200 , and the brightness enhancement sheet 1200 needs to be disposed on the diffuser 1100 .

[0069] Optionally, the diffuser 1100 in the backlight module 000 has a strip-shaped light-absorbing structure 1100a on one side close to the light source 300. The light-absorbing structure 1100a in the diffuser 1100 can contact the reflective strip 900 in the backlight module 000. In this way, when the reflective strip 900 in the backlight module 000 is a white rubber strip, although the reflective strip 900 can reflect most of the light emitted by the light source 300, a small amount of light will be transmitted through the reflective strip 900, and this part of the light that is transmitted can be absorbed by the light-absorbing structure 1100a in the diffuser 1100, effectively avoiding the light leakage phenomenon of the light source 300.

[0070] Optionally, the backlight module 000 may further include a reflective sheet 1300 located on the side of the light guide plate 200 away from the diffuser 1100. The reflective sheet 1300 may reflect the light transmitted from the light guide plate 200 out of the light guide plate 200 from the side of the light guide plate 200 close to the diffuser 1100.

[0071] Optionally, the backlight module 000 may further include: a light shielding glue 1400 located on the side of the frame 100 away from the light guide plate 200. The light shielding glue 1400 may be a double-sided adhesive tape, so that one side of the light shielding glue 1400 may be bonded to the liquid crystal display panel, and the other side of the light shielding glue 1400 may be bonded to the light absorbing strip 1000. For example, the light absorbing strip 1000 may be a black adhesive strip without adhesive tape, so that after the black adhesive strip is bonded to the light shielding glue 1400, the black adhesive strip may absorb the light that has not passed through the brightness enhancement sheet 1200 in the backlight module 000, so that it can be ensured that the light emitted from the backlight module 000 can pass through the light guide plate 200, the diffusion sheet 1100 and the brightness enhancement sheet 1200 in sequence.

[0072] In summary, a backlight module provided by an embodiment of the present application includes: a frame, a light guide plate, a side-entry light source, and a first flexible circuit board. Since the bottom plate in the frame has an outlet opening connected to the mounting groove, the first flexible circuit board connected to the light source can be distributed on the back of the backlight module without bending after extending through the outlet opening, so as to ensure that the portion of the first flexible circuit board extending from the outlet opening can be normally connected to the control component. In this way, it can be ensured that there is no rebound force in the first flexible circuit board, so that the light source connected to the first flexible circuit board is not prone to warping, and further, it can be ensured that the light emitted by the light source can basically all be shot into the light guide plate, so as to ensure that the probability of light leakage in the backlight module is low, so that the display effect of the electronic device integrated with such a backlight module is better.

[0073] The present application also provides an electronic device, which may include: the above-mentioned backlight module, and a liquid crystal display panel located on the light-emitting side of the backlight module. Figure 8 , Figure 8 0013 is a schematic diagram of a film structure of an electronic device provided in an embodiment of the present application. The electronic device may include: a backlight module 000 and a liquid crystal display panel 001. The liquid crystal display panel 001 in the electronic device generally includes: an array substrate 0012 and a color filter substrate 0013 arranged opposite to each other, a liquid crystal layer ( Figure 7 The array substrate 0012 is provided with a first polarizer 0011 located on the light incident side of the liquid crystal display panel 001, and a second polarizer 0014 located on the light exiting side of the liquid crystal display panel 001. The polarization direction of the first polarizer 0011 can be perpendicular to the polarization direction of the second polarizer 0014. In addition, the array substrate 0012 is closer to the backlight module 000 than the color filter substrate 0013. Here, the edge of the array substrate 0012 can be bonded to the backlight module 000.

[0074] Optionally, the electronic device may further include: a protective cover plate 002 , an optical adhesive layer 003 , a second flexible circuit board 004 , and a copper foil 005 .

[0075] The protective cover plate 002 in the electronic device can be located on the side of the second polarizer 0014 away from the color film substrate 0013. The protective cover plate 002 can be a glass cover plate. The liquid crystal display panel 001 can be protected by the protective cover plate 002 to ensure that when the front of the electronic device is hit, the protective cover plate 002 can bear the impact force to reduce the probability of the liquid crystal display panel 001 being broken.

[0076] The optical adhesive layer 003 in the electronic device can be used to achieve the bonding between the protective cover plate 002 and the second polarizer 0014, and the optical adhesive layer 003 is usually made of transparent glue (for example, acrylic glue). In this way, it can be ensured that the light emitted by the liquid crystal display panel 001 passes through the optical adhesive layer 003 and the protective cover plate 002 before being emitted. In addition, the optical adhesive layer 003 also has good cushioning properties. In this way, after the front of the electronic device is hit, the cushioning of the optical adhesive layer 003 can reduce the probability of the protective cover plate 002 being broken.

[0077] The second flexible circuit board 004 in the electronic device can be electrically connected to the liquid crystal display panel 001. For example, the non-display area of ​​the liquid crystal display panel 001 has a binding structure, and one end of the second flexible circuit board 004 has a connecting structure. One end of the second flexible circuit board 004 can be electrically connected to the binding structure in the liquid crystal display panel 001 through the connecting structure, so that the electrical connection between the second flexible circuit board 004 and the liquid crystal display panel 001 can be achieved.

[0078] The copper foil 005 in the electronic device can dissipate the heat generated by the second flexible circuit board 004. In this way, the working temperature of the second flexible circuit board 004 can be effectively reduced.

[0079] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0080] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A backlight module, characterized in that: include: A frame, a light guide plate, an edge-entry light source and a first flexible circuit board; The frame includes: a bottom plate, and an annular side plate fixedly connected to the edge of the bottom plate, the side plate and the bottom plate are used to enclose a mounting groove, and the bottom plate has a lead-out opening communicated with the mounting groove; The light guide plate and the light source are both located in the mounting groove, and the light emitting surface of the light source faces the side surface of the light guide plate; A portion of the first flexible circuit board is located in the mounting groove and connected to the light source, and another portion of the first flexible circuit board extends out of the mounting groove through the lead-out opening.

2. The backlight module according to claim 1, characterized in that: The orthographic projection of the outlet opening on a reference plane parallel to the light guide plate is located within the orthographic projection of the light guide plate on the reference plane.

3. The backlight module according to claim 2, characterized in that: The first flexible circuit board includes: a first sub-portion and a second sub-portion, the first sub-portion and the second sub-portion are both in strip shape, and the overall extension direction of the first sub-portion intersects with the overall extension direction of the second sub-portion, the first sub-portion is located in the mounting groove and connected to the light source, the end of the second sub-portion is fixedly connected to the first sub-portion, and the second sub-portion extends out of the mounting groove through the lead-out opening; Wherein, in the overall extension direction of the second sub-portion, the outlet opening is distributed between the first sub-portion and the portion of the second sub-portion extending from the outlet opening.

4. The backlight module according to claim 3, characterized in that: The backlight module further includes: a first sealing strip and a second sealing strip located outside the mounting groove and distributed at the outlet opening, wherein in the overall extension direction of the second sub-portion, the first sealing strip and the second sealing strip are respectively distributed at two sides of the outlet opening; Part of the first sealing strip is connected to the frame, and another part extends into the outlet opening and is connected to a side of the second sub-portion away from the light guide plate; part of the second sealing strip is connected to the frame, and another part extends into the outlet opening and is connected to a side of the second sub-portion close to the light guide plate.

5. The backlight module according to claim 4, characterized in that: An orthographic projection of the first sealing strip on the reference plane and an orthographic projection of the second sealing strip on the reference plane have an overlapping area.

6. The backlight module according to claim 3, characterized in that: The first sub-part includes: a main body connected to the light source, and a fixing part connected to the main body, and the second sub-part is fixedly connected to a side of the fixing part away from the main body; The backlight module further includes: a first adhesive layer located between the fixing portion and the light guide plate, wherein two oppositely disposed surfaces of the first adhesive layer are respectively bonded to the fixing portion and the light guide plate.

7. The backlight module according to any one of claims 3 to 6, characterized in that: The backlight module further comprises a guide bar detachably connected to an end of the second sub-portion away from the first sub-portion.

8. The backlight module according to claim 7, characterized in that: A width of the guide strip at one end facing the second sub-portion is smaller than or equal to a width of the second sub-portion at one end facing away from the first sub-portion.

9. The backlight module according to claim 8, characterized in that: The width of the guide bar gradually decreases in a direction away from the second sub-portion.

10. An electronic device, characterized in that: include: The backlight module as claimed in any one of claims 1 to 9, and a liquid crystal display panel located on the light-emitting side of the backlight module.

Images