Backlight module and display device

Abstract

A backlight module has a light emitting direction and includes a back frame, a light guide plate and a buffer element. The back frame includes a base and a sidewall connected to the base. The sidewall has at least one first position limiting inclined plane, where a first bevel space is formed between the first position limiting inclined plane and the base. The light guide plate is disposed on the base. The buffer element is disposed between the sidewall and the light guide plate. The buffer element has at least one second position limiting inclined plane, where a second bevel space is formed between the second position limiting inclined plane and the base. At least a portion of the buffer element is located in the first bevel space and contacts against the first position limiting inclined plane, and at least a portion of the light guide plate is located in the second bevel space and contacts against the second position limiting inclined plane.

Description

Technical Field

[0001] This disclosure relates to a backlight module and a display device comprising the aforementioned backlight module. Prior Technology

[0002] To meet impact resistance requirements, current display devices typically use buffers around the backlight module to secure the light guide plate to the back frame, and adhesive tape is used to bond the back frame, light guide plate, and buffers together. However, in reliability tests, such as impact or vibration tests, the buffers can easily detach from the back frame due to external forces, making it impossible to effectively secure the light guide plate to the back frame, thus reducing reliability. Summary of the Invention

[0003] The purpose of this disclosure is to provide a backlight module that can improve the overall reliability of the backlight module by utilizing the interlocking structure between the back frame and the buffer component.

[0004] This disclosure provides at least one other embodiment of a display device including the aforementioned backlight module, which can improve the overall reliability of the display device by utilizing the aforementioned locking structure.

[0005] This disclosure discloses at least one embodiment of a backlight module having a light emission direction and comprising a back frame, a light guide plate, and a buffer. The back frame includes a base plate and a side wall connecting to the base plate. The side wall has at least one first limiting slope, forming a first angled space between the first limiting slope and the base plate. The light guide plate is disposed on the base plate. The buffer is disposed between the side wall and the light guide plate, and the buffer has at least one second limiting slope, forming a second angled space between the second limiting slope and the base plate. At least a portion of the buffer is located in the first angled space and is contacted by the first limiting slope, while at least a portion of the light guide plate is located in the second angled space and is contacted by the second limiting slope.

[0006] In the backlight module and display device including the backlight module disclosed in at least one embodiment, the first limiting inclined surface of the back frame and the first angled space formed between the first limiting inclined surface and the bottom plate of the back frame can jointly provide a fixed limiting effect for the buffer, preventing the buffer from jumping off when the backlight module is subjected to impact or vibration. Furthermore, the second limiting inclined surface of the buffer and the second angled space formed between the second limiting inclined surface and the bottom plate of the back frame can also jointly provide a fixed limiting effect for the light guide plate, preventing the light guide plate from jumping off when the backlight module is subjected to impact or vibration. Therefore, the reliability of the backlight module can be improved. Simple Explanation of the Diagram

[0007] Figure 1 is a partial schematic diagram of a backlight module according to at least one embodiment of the present disclosure. Figure 2 is a schematic cross-sectional view drawn along line a-a' in Figure 1. Figure 3 is a schematic diagram of the back frame, buffer, and light guide plate of at least one embodiment of the present disclosure. Figure 4 is a schematic diagram of a buffer component according to at least one embodiment of this disclosure. Figure 5 is a partial schematic diagram of a backlight module according to at least another embodiment of the present disclosure. Figure 6 is a schematic diagram of the back frame, buffer, and light guide plate of at least another embodiment of this disclosure. Figure 7 is a partial schematic diagram of the back frame of at least another embodiment of this disclosure. Figure 8 is a partial schematic diagram of a backlight module according to at least another embodiment of the present disclosure. Figure 9 is a schematic diagram of the back frame, buffer, and light guide plate of at least another embodiment of the present disclosure. Figure 10 is a schematic diagram of a buffer according to at least another embodiment of this disclosure. Figure 11 is a schematic cross-sectional view of a display device according to at least one embodiment of the present disclosure. Implementation

[0008] In the following text, to clearly present the technical features of this disclosure, the dimensions (e.g., length, width, thickness, and depth) of the elements (e.g., layers, films, substrates, and regions) in the drawings will be enlarged proportionally, and the number of some elements may be reduced. Therefore, the description and explanation of the embodiments below are not limited to the number of elements in the drawings and the size and shape of the elements, but should cover the dimensions, shapes, and deviations from both caused by actual manufacturing processes and / or tolerances.

[0009] The spatial relative terms used in this disclosure, such as "below," "under," "above," and "above," are for the convenience of describing the relative relationship between one element or feature and another, as illustrated in the figure. The true meaning of these spatial relative terms includes other orientations. For example, when the illustration is rotated 180 degrees vertically, the relationship between one element and another may change from "below" or "under" to "above" or "above." Furthermore, the spatial relative descriptions used in this disclosure should be interpreted in the same way.

[0010] It should be understood that although this disclosure may use terms such as "first," "second," and "third" to describe various elements or features, these elements or features should not be limited by these terms. These terms are primarily used to distinguish one element from another, or one feature from another. Furthermore, the term "or" as used in this disclosure may, as appropriate, include any combination of one or more of the associated listed items.

[0011] Please refer to Figures 1 to 3. The backlight module 10 has a light emission direction ED and includes a back frame 100, a light guide plate 102, and a buffer 104. The back frame 100 includes a base plate 100p and a side wall 100w connected to the base plate 100p. The side wall 100w has at least one first limiting slope S1, and a first angled space B1 is formed between the first limiting slope S1 and the base plate 100p. The light guide plate 102 is disposed on the base plate 100p. The buffer 104 is disposed between the side wall 100w and the light guide plate 102. The buffer 104 has at least one second limiting slope S2, and a second angled space B2 is formed between the second limiting slope S2 and the base plate 100p. At least a portion of the buffer 104 is located in the first oblique space B1 and is contacted by the first limiting slope S1, while at least a portion of the light guide plate 102 is located in the second oblique space B2 and is contacted by the second limiting slope S2.

[0012] The back frame 100 serves as a structure to support the buffer 104 and the light guide plate 102. The back frame 100, the buffer 104, and the light guide plate 102 have an interlocking structure design. In particular, the first limiting inclined surface S1 on the side wall 100w of the back frame 100 and the first inclined surface S1 and the bottom plate 100p of the back frame 100 form a first angled space B1 to accommodate the buffer 104. The bottom plate 100p and the first limiting inclined surface S1 can jointly provide a fixed limiting effect for the buffer 104. When the backlight module 10 is impacted or vibrated, the buffer 104 can be prevented from jumping out. Similarly, the second oblique space B2 formed between the second limiting slope S2 of the buffer 104 and the bottom plate 100p of the back frame 100 can also be used to accommodate the light guide plate 102. The bottom plate 100p and the second limiting slope S2 can jointly provide a fixed limiting effect for the light guide plate 102. When the backlight module 10 is subjected to impact or vibration, the light guide plate 102 can also be prevented from jumping off. Compared to conventional backlight modules that use tape to fix the back frame, light guide plate, and buffer, this disclosure not only utilizes the first inclined space B1 and the second inclined space B2 formed by the first limiting inclined surface S1 and the second limiting inclined surface S2 with the base plate 100p respectively to accommodate the components that come into contact with the limiting inclined surface, but also achieves the effect of effectively fixing the buffer 104 and the light guide plate 102 with the back frame 100, improving the reliability of the backlight module 10. It also saves the tape cost and assembly time of conventional backlight modules, and is easier to disassemble and reassemble in heavy-duty situations without residual adhesive.

[0013] As shown in Figure 1, the buffer 104 is provided at the corner C of the light guide plate 102 to prevent the corner C of the light guide plate 102 from generating powder due to impact, which would cause scratches on the surface of the light guide plate 102 and form bright spots when lit, thus making the backlight module 10 unable to meet specifications. In some embodiments, the light guide plate 102 has four corners C, so the backlight module 10 may include four buffers 104 respectively provided at the four corners C. However, this disclosure is not limited to this. The number of buffers 104 can correspond to the number of corners C of the light guide plate 102 to ensure that the corners of the light guide plate 102 do not warp upwards, thereby maintaining the flatness of the light guide plate 102.

[0014] As shown in Figure 2, the thickness TN of the sidewall 100w of the back frame 100 gradually increases from the bottom plate 100p of the back frame 100 along the light emission direction ED. That is, the sidewall 100w has an inner surface IS facing the light guide plate 102 and an outer surface OS facing away from the light guide plate 102. The distance between the inner surface IS and the outer surface OS gradually increases from the bottom plate 100p along the light emission direction ED, and an acute angle θ is formed between the inner surface IS and the bottom plate 100p. By means of the aforementioned thickness variation design of the sidewall 100w, a space for accommodating the buffer member 104 can also be formed between the inner surface IS of the sidewall 100w and the bottom plate 100p of the back frame 100, which can also provide a fixed limiting effect for the buffer member 104. In some embodiments, the inner surface IS may include a first limiting slope S1, but this disclosure is not limited thereto.

[0015] Please refer to Figures 3 and 4. The sidewall 100w includes a protrusion Pa. The protrusion Pa of the sidewall 100w is located on the side of the sidewall 100w facing the buffer member 104 and has a first limiting slope S1. The buffer member 104 includes a first groove R1. The first groove R1 of the buffer member 104 is located on the side of the buffer member 104 facing the sidewall 100w and corresponds to the protrusion Pa of the sidewall 100w. The width wa of the protrusion Pa of the sidewall 100w and the width wb of the first groove R1 of the buffer member 104 both gradually increase from the base plate 100p along the light emission direction ED. In addition, the thickness ta of the protrusion Pa of the sidewall 100w and the depth da of the first groove R1 of the buffer member 104 both gradually increase from the base plate 100p along the light emission direction ED.

[0016] With the above design, when the backlight module 10 is impacted or vibrated, since the width and thickness of the upper half of the protrusion Pa of the side wall 100w are greater than the width and depth of the lower half of the first groove R1 of the buffer 104, the buffer 104 can be effectively prevented from jumping upward.

[0017] As shown in Figure 3, in addition to the first limiting inclined surface S1, the protrusion Pa also has other first limiting inclined surfaces S5 and S9, and the first limiting inclined surfaces S5 and S9 form other first oblique angle spaces (unlabeled) with the base plate 100p. Specifically, the first limiting inclined surface S1 forms an acute angle θ1 towards the base plate 100p, and the first limiting inclined surface S1 and the base plate 100p form a first oblique angle space B1. The first limiting inclined surfaces S5 and S9 form other acute angles (unlabeled) towards the base plate 100p, and the first limiting inclined surfaces S5 and S9 and the base plate 100p each form a first oblique angle space. Thus, the multiple limiting inclined surfaces of the protrusion Pa with different inclination directions can improve the multi-faceted fixing effect of the protrusion Pa on the buffer 104.

[0018] As shown in Figure 4, the first groove R1 has first corresponding inclined surfaces S3, S7, and S11 that correspond to the first limiting inclined surfaces S1, S5, and S9 of the protrusion Pa, respectively. With the aforementioned design, the first limiting inclined surfaces S1, S5, S9 of the protrusion Pa and the first inclined surfaces S1, S5, S9 and the bottom plate 100p of the back frame 100 respectively form the first oblique angle space, which can fix the buffer 104 with the first corresponding inclined surfaces S3, S7, S11 of the first groove R1 in different inclined directions. When the backlight module 10 is impacted or vibrated, the buffer 104 can be prevented from jumping off.

[0019] Please refer to Figure 3. The buffer 104 includes a second groove R2, which is located on the side of the buffer 104 facing the light guide plate 102 and has a second limiting slope S2. The light guide plate 102 includes a protrusion Pb, which is located on the side of the light guide plate 102 facing the buffer 104 and corresponds to the second groove R2 of the buffer 104. The width wc of the second groove R2 of the buffer 104 and the width wd of the protrusion Pb of the light guide plate 102 both gradually decrease from the bottom plate 100p along the light emission direction ED. In addition, the depth db of the second groove R2 of the buffer 104 and the thickness tb of the protrusion Pb of the light guide plate 102 both gradually decrease from the bottom plate 100p along the light emission direction ED.

[0020] With the above design, when the backlight module 10 is subjected to impact or vibration, since the width and depth of the upper half of the second groove R2 of the buffer 104 are smaller than the width and thickness of the lower half of the protrusion Pb of the light guide plate 102, the second groove R2 of the buffer 104 can effectively prevent the light guide plate 102 from jumping upward.

[0021] As shown in Figure 3, the second groove R2, in addition to the second limiting inclined surface S2, also has other second limiting inclined surfaces S6 and S10, and the second limiting inclined surfaces S6 and S10 respectively form other second oblique angle spaces (unlabeled) with the base plate 100p. Specifically, the second limiting inclined surface S2 forms an acute angle θ2 towards the base plate 100p, and the second limiting inclined surface S2 and the base plate 100p form a second oblique angle space B2. The second limiting inclined surfaces S6 and S10 respectively form other acute angles (unlabeled) towards the base plate 100p, and the second limiting inclined surfaces S6 and S10 respectively form second oblique angle spaces with the base plate 100p. Thus, the multiple limiting inclined surfaces with different tilt directions of the protrusion Pb can improve the multi-faceted fixing effect of the protrusion Pb to the light guide plate 102.

[0022] Furthermore, the second limiting slope S6 of the second groove R2 near the corner C of the light guide plate 102 has the opposite inclination direction to the first corresponding slope S7 of the first groove R1 near the corner C of the light guide plate 102, while the second limiting slope S2 of the second groove R2 away from the corner C of the light guide plate 102 has the opposite inclination direction to the first corresponding slope S3 of the first groove R1 away from the corner C of the light guide plate 102.

[0023] As shown in Figure 3, the bump Pb has second corresponding inclined surfaces S4, S8, and S12 that correspond to the second limiting inclined surfaces S2, S6, and S10 of the second groove R2, respectively. With the aforementioned design, the second limiting inclined surfaces S2, S6, and S10 of the second groove R2 and the second limiting inclined surfaces S2, S6, and S10 and the bottom plate 100p of the back frame 100 respectively form a second oblique angle space that can fix the light guide plate 102 to the second corresponding inclined surfaces S4, S8, and S12 of the bump Pb with different inclined surfaces. When the backlight module 10 is subjected to impact or vibration, the light guide plate 102 can be prevented from jumping off.

[0024] Please refer to Figures 3 and 4. The first limiting inclined surfaces S1 and S5 are located on both sides of the first limiting inclined surface S9, the first corresponding inclined surfaces S3 and S7 are located on both sides of the first corresponding inclined surface S11, the second limiting inclined surfaces S2 and S6 are located on both sides of the second limiting inclined surface S10, and the second corresponding inclined surfaces S4 and S8 are located on both sides of the second corresponding inclined surface S12. Furthermore, the absolute values ​​of the slopes of the first limiting inclined surfaces S1 and S5, and the first corresponding inclined surfaces S3 and S7 are the same, but their inclination directions are opposite. The absolute values ​​of the slopes of the second limiting inclined surfaces S2 and S6, and the second corresponding inclined surfaces S4 and S8 are the same, but their inclination directions are opposite. The absolute values ​​of the slopes of the second limiting inclined surface S6 and the first corresponding inclined surface S7 are the same, and the absolute values ​​of the slopes of the second limiting inclined surface S2 and the first corresponding inclined surface S3 are the same. By using the aforementioned design with the same absolute value of slope, the manufacturing method of the back frame 100, light guide plate 102 and buffer 104 can be simplified, but this disclosure is not limited thereto.

[0025] In other embodiments, the absolute values ​​of the slopes of the first limiting inclined surfaces S1 and S5 and the first corresponding inclined surfaces S3 and S7 may be different; the absolute values ​​of the slopes of the second limiting inclined surfaces S2 and S6 and the second corresponding inclined surfaces S4 and S8 may be different; the absolute values ​​of the slopes of the second limiting inclined surface S6 and the first corresponding inclined surface S7 may be different; and the absolute values ​​of the slopes of the second limiting inclined surface S2 and the first corresponding inclined surface S3 may be different. By employing the aforementioned design with different absolute values ​​of slope, the effect of preventing assembly errors can be achieved.

[0026] In some embodiments, the material of the buffer 104 may include elastic materials such as rubber and silicone to achieve appropriate cushioning and rebound effects, but this disclosure is not limited thereto.

[0027] Please refer to Figures 5 to 7. The embodiments in Figures 5 to 7 are identical to those in Figures 1 to 4 in terms of the structure, relative position, and materials of most components. Therefore, the same technical features will not be repeated here. The main difference between the two embodiments is that in Figures 5 to 7, the back frame 100' of the backlight module 10' forms one or more first oblique angle spaces B1, B1' between the side wall 100w and the base plate 100p, while the buffer 104 forms one or more second oblique angle spaces B2, B2' between the base plate 100p and the buffer 104.

[0028] In detail, as shown in Figure 6, the side wall 100w of the back frame 100' includes a first wall W1 and a second wall W2 connected to the first wall W1. The buffer 104' includes a first outer wall OW1 and a second outer wall OW2 connected to the first outer wall OW1. The first outer wall OW1 and the second outer wall OW2 face the first wall W1 and the second wall W2 respectively. The first wall W1 and the second wall W2 form first oblique space B1 and B1' between the bottom plate 100p of the back frame 100' respectively. The first outer wall OW1 and the second outer wall OW2 are respectively confined in the first oblique space B1 and B1'. In other words, this disclosure can increase the number of first oblique angle spaces B1 that provide fixed positioning for the buffer 104 by the back frame 100' according to the shape or length of the buffer 104. In this embodiment, since the buffer 104 is set at the corner C of the light guide plate 102, first oblique angle spaces B1 that provide fixed positioning are provided on the first outer wall OW1 and the second outer wall OW2, respectively. Therefore, not only can the stability of the fixed positioning be increased, but also, through the aforementioned design, first oblique angle spaces B1 and B1' can be formed between the first wall W1 and the second wall W2 of the side wall 100w of the back frame 100' and the bottom plate 100p of the back frame 100' in two directions (e.g., the X direction and the Y direction). Therefore, the buffer 104' can be fixed in two directions at the same time. When the backlight module 10' is impacted or vibrated, the buffer 104' can be further prevented from jumping off, thereby effectively improving the reliability of the backlight module 10'.

[0029] Furthermore, the buffer 104' includes a first inner wall IW1 and a second inner wall IW2 connected to the first inner wall IW1, and the light guide plate 102' has a first surface F1 and a second surface F2 connected to the first surface F1. The first surface F1 and the second surface F2 face the first inner wall IW1 and the second inner wall IW2 respectively. The first inner wall IW1 and the second inner wall IW2 form second oblique angle spaces B2 and B2' between the bottom plate 100p of the back frame 100' respectively. The first surface F1 and the second surface F2 are respectively confined in the second oblique angle spaces B2 and B2'. With the aforementioned design, the first inner wall IW1 and the second inner wall IW2 of the buffer 104 can form a second oblique space B2, B2' between the bottom plate 100p of the back frame 100' in two directions (e.g., the X direction and the Y direction). Therefore, the light guide plate 102' can be fixed in two directions at the same time. When the backlight module 10' is subjected to impact or vibration, the light guide plate 102' can be further prevented from jumping off, thereby effectively improving the reliability of the backlight module 10'.

[0030] For example, please continue to refer to Figure 6. In addition to the first wall W1 containing the protrusion Pa, the second wall W2 of the back frame 100' also contains the protrusion Pa'. In addition to the first outer wall OW1 containing the first groove R1, the second outer wall OW2 of the buffer 104' also contains the first groove R1' corresponding to the protrusion Pa'. In addition to the first inner wall IW1 containing the second groove R2, the second inner wall IW2 of the buffer 104' also contains the second groove R2'. In addition to the first surface F1 containing the protrusion Pb, the second surface F2 of the light guide plate 102' also contains the protrusion Pb' corresponding to the second groove R2'. The structure and relative position of the protrusion Pa', the first groove R1', the second groove R2' and the protrusion Pb' are roughly the same as those of the protrusion Pa, the first groove R1, the second groove R2 and the protrusion Pb in the embodiments of Figures 1 to 4. Therefore, the same technical features will not be described again here.

[0031] As shown in Figures 5 and 7, the base plate 100p of the back frame 100' has a slot O, and the buffer 104' is disposed on the slot O, which can also be seen in the cross-sectional view of Figure 2. With the aforementioned design, the slot O not only serves as a positioning structure for the buffer 104' by the base plate 100p, but also provides a margin for deformation and extension of the expanded buffer 104' when it expands (e.g., due to thermal expansion). This is because the first oblique angle space B1 restricts the space of the buffer 104', thus preventing the expanded buffer 104' from extending in other directions and compressing the light guide plate 102' or the optical film (not shown) on the light guide plate 102', which could be damaged. In some embodiments, the shape of the buffer 104' and the shape of the slot O can be approximately L-shaped. Furthermore, as shown in Figures 5 and 6, the buffer 104' has a notch N corresponding to the corner C of the light guide plate 102'. When the buffer 104' expands (e.g., due to thermal expansion), the notch N can prevent the corner C of the light guide plate 102' from being damaged.

[0032] Please refer to Figures 8 to 10. The embodiments in Figures 8 to 10 have the same structure, relative positional relationship, and materials for most components as the embodiments in Figures 5 to 7, so the same technical features will not be described again here. The main difference between the two embodiments is that the sidewall 100w of the back frame 100A of the backlight module 10A in Figures 8 to 10 includes a groove Ra with a first limiting slope S1, while the buffer 104A includes a first protrusion P1 corresponding to the groove Ra and a second protrusion P2 with a second limiting slope S2.

[0033] In detail, the width we of the groove Ra of the sidewall 100w and the width wf of the first protrusion P1 of the buffer member 104A both gradually decrease from the base plate 100p along the light emission direction ED. In addition, the depth dc of the groove Ra of the sidewall 100w and the thickness tc of the first protrusion P1 of the buffer member 104A both gradually decrease from the base plate 100p along the light emission direction ED.

[0034] With the above design, when the backlight module 10A is subjected to impact or vibration, since the width and depth of the upper half of the groove Ra of the side wall 100w are less than the width and thickness of the lower half of the first protrusion P1 of the buffer 104A, the buffer 104A can be effectively prevented from jumping upward.

[0035] Please refer to Figures 9 and 10. The width wg of the second protrusion P2 of the buffer 104A and the width wh of the groove Rb of the light guide plate 102A both gradually increase from the base plate 100p along the light emission direction ED. In addition, the thickness td of the second protrusion P2 of the buffer 104A and the depth dd of the groove Rb of the light guide plate 102A both gradually increase from the base plate 100p along the light emission direction ED.

[0036] With the above design, when the backlight module 10A is subjected to impact or vibration, since the width and thickness of the upper half of the second protrusion P2 of the buffer 104A are greater than the width and depth of the lower half of the groove Rb of the light guide plate 102A, the light guide plate 102A can be effectively prevented from jumping upward.

[0037] The first limiting inclined surfaces S1, S5, S9 of the groove Ra, the second limiting inclined surfaces S2, S6, S10 of the second protrusion P2, the first corresponding inclined surfaces S3, S7, S11 of the first protrusion P1, and the second corresponding inclined surfaces S4, S8, S12 of the groove Rb in the embodiments of Figures 8 to 10 are substantially the same in structure and relative position as the first limiting inclined surfaces S1, S5, S9, the second limiting inclined surfaces S2, S6, S10, the first corresponding inclined surfaces S3, S7, S11, and the second corresponding inclined surfaces S4, S8, S12 in the embodiments of Figures 1 to 4. Therefore, the same technical features will not be described again here.

[0038] Please refer to Figures 9 and 10. In addition to the first wall W1 containing the groove Ra, the second wall W2 of the back frame 100A also contains the groove Ra'. In addition to the first outer wall OW1 containing the first protrusion P1, the second outer wall OW2 of the buffer 104A also contains the first protrusion P1' corresponding to the groove Ra'. In addition to the first inner wall IW1 containing the second protrusion P2, the second inner wall IW2 of the buffer 104A also contains the second protrusion P2'. In addition to the first surface F1 containing the groove Rb, the second surface F2 of the light guide plate 102A also contains the groove Rb' corresponding to the second protrusion P2'. The groove Ra', the first protrusion P1', the second protrusion P2' and the groove Rb' are roughly the same in structure and relative position as the groove Ra, the first protrusion P1, the second protrusion P2 and the groove Rb, respectively. Therefore, the same technical features will not be described again here.

[0039] Referring to Figure 11, the display device 1 includes a backlight module 10 and a display panel 20 disposed on the backlight module 10. The display panel 20 may be a liquid crystal display panel. In other embodiments, the backlight module included in the display device 1 may be the backlight module 10' of Figure 5, the backlight module 10A of Figure 8, or various combinations of the backlight modules of the above embodiments.

[0040] In summary, in the backlight module and display device including the aforementioned backlight module according to at least one embodiment disclosed above, the first limiting slope of the back frame and the first angled space formed between the first limiting slope and the bottom plate of the back frame can jointly provide a fixing and limiting effect on the buffer member, preventing the buffer member from jumping off when the backlight module is subjected to impact or vibration. Furthermore, the second limiting slope of the buffer member and the second angled space formed between the second limiting slope and the bottom plate of the back frame can also jointly provide a fixing and limiting effect on the light guide plate, preventing the light guide plate from jumping off when the backlight module is subjected to impact or vibration. Therefore, the reliability of the backlight module can be improved.

[0041] Although this disclosure has been disclosed above with reference to embodiments, it is not intended to limit this disclosure. Those skilled in the art may make some modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the appended claims.

[0042] 1: Display device 10, 10', 10A: Backlight module 20: Display panel 100, 100', 100A: Back frame 100p: Base Plate 100w: Side wall 102, 102', 102A: Light guide plate 104, 104', 104A: Buffer components B1, B1': First oblique angle space B2, B2': Second oblique angle space C: Corner da, db, dc, dd: depth ED: light emission direction F1: First Page F2: Second side IS: Inner Surface IW1: First Inner Wall IW2: Second Inner Wall N: Gap O: Grooving OS: Outer Surface OW1: First Outer Wall OW2: Second Outer Wall Pa, Pa', Pb, Pb': bumps R1, R1': First groove R2, R2': Second groove P1, P1': First convex block P2, P2': Second convex block Ra, Ra', Rb, Rb': Groove S1, S5, S9: First limiting inclined plane S2, S6, S10: Second limiting inclined plane S3, S7, S11: First corresponding inclined plane S4, S8, S12: Second corresponding inclined plane ta, tb, tc, td, TN: thickness W1: First Wall W2: Second Wall wa, wb, wc, wd, we, wf, wg, wh: width θ, θ1, θ2: Acute angles

[0043] Domestic storage information (please note in order of storage institution, date, and number) none Overseas storage information (please note in the order of storage country, institution, date, and number) none

Claims

1. A backlight module having a light emission direction, and comprising: A back frame includes a base plate and a side wall connected to the base plate, wherein the side wall has at least one first limiting inclined surface, and a first angled space is formed between the first limiting inclined surface and the base plate; a light guide plate is disposed on the base plate; and a buffer member is disposed between the side wall and the light guide plate, the buffer member having at least one second limiting inclined surface, and a second angled space is formed between the second limiting inclined surface and the base plate, wherein at least a portion of the buffer member is located in the first angled space and is contacted by the first limiting inclined surface, and at least a portion of the light guide plate is located in the second angled space and is contacted by the second limiting inclined surface. The side wall includes a first wall and a second wall connected to the first wall. The buffer includes a first outer wall and a second outer wall connected to the first outer wall. The first outer wall and the second outer wall face the first wall and the second wall respectively. The first wall and the second wall and the base plate respectively form the first angled space. The first outer wall and the second outer wall are respectively confined in the first angled space.

2. The backlight module as described in claim 1, wherein the sidewall includes a protrusion, the protrusion of the sidewall is located on the side of the sidewall facing the buffer and has the first limiting slope, and the buffer includes a first groove, the first groove of the buffer is located on the side of the buffer facing the sidewall and corresponds to the protrusion of the sidewall, wherein the width of the protrusion of the sidewall and the width of the first groove of the buffer both gradually increase from the base plate along the light emission direction.

3. The backlight module as described in claim 2, wherein the thickness of the protrusion on the sidewall and the depth of the first groove of the buffer both gradually increase from the base plate along the light emission direction.

4. The backlight module as described in claim 2, wherein the buffer includes a second groove, the second groove of the buffer is located on the side of the buffer facing the light guide plate and has the second limiting slope, and the light guide plate includes a protrusion, the protrusion of the light guide plate is located on the side of the light guide plate facing the buffer and corresponds to the second groove of the buffer, wherein the width of the second groove of the buffer and the width of the protrusion of the light guide plate both gradually decrease from the base plate along the light emission direction.

5. The backlight module as described in claim 4, wherein the depth of the second groove of the buffer and the thickness of the protrusion of the light guide plate both gradually decrease from the base plate along the light emission direction.

6. The backlight module as described in claim 2, wherein the buffer includes a protrusion, the protrusion of the buffer is located on the side of the buffer facing the light guide plate and has the second limiting slope, and the light guide plate includes a groove, the groove of the light guide plate is located on the side of the light guide plate facing the buffer and corresponds to the protrusion of the buffer, wherein the width of the protrusion of the buffer and the width of the groove of the light guide plate both gradually increase from the base plate along the light emission direction.

7. The backlight module as described in claim 1, wherein the sidewall includes a groove, the groove of the sidewall is located on the side of the sidewall facing the buffer and has the first limiting slope, and the buffer includes a first protrusion, the first protrusion of the buffer is located on the side of the buffer facing the sidewall and corresponds to the groove of the sidewall, wherein the width of the groove of the sidewall and the width of the first protrusion of the buffer both gradually decrease from the base plate along the light emission direction.

8. The backlight module as described in claim 7, wherein the depth of the groove in the sidewall and the thickness of the first protrusion in the buffer gradually decrease from the base plate along the light emission direction.

9. The backlight module as claimed in claim 7, wherein the buffer includes a second protrusion, the second protrusion of the buffer being located on the side of the buffer facing the light guide plate and having the second limiting slope, and the light guide plate includes a groove, the groove of the light guide plate being located on the side of the light guide plate facing the buffer and corresponding to the second protrusion of the buffer, wherein the width of the second protrusion of the buffer and the width of the groove of the light guide plate both gradually increase from the base plate along the light emission direction.

10. The backlight module as claimed in claim 7, wherein the buffer includes a groove, the groove of the buffer is located on the side of the buffer facing the light guide plate and has the second limiting slope, and the light guide plate includes a protrusion, the protrusion of the light guide plate is located on the side of the light guide plate facing the buffer and corresponds to the groove of the buffer, wherein the width of the groove of the buffer and the width of the protrusion of the light guide plate both gradually decrease from the base plate along the light emission direction.

11. The backlight module as claimed in claim 1, wherein the first limiting bevel forms an acute angle between the bevel and the base plate.

12. The backlight module as claimed in claim 1, wherein the second limiting bevel forms an acute angle between the two surfaces facing the base plate.

13. The backlight module as described in claim 1, wherein the thickness of the sidewall gradually increases from the base plate along the light emission direction.

14. The backlight module as described in claim 1, wherein the base plate has a slot and the buffer is disposed on the slot.

15. The backlight module as described in claim 1, wherein the buffer is disposed at the corner of the light guide plate.

16. The backlight module as claimed in claim 1, wherein the buffer includes a first inner wall and a second inner wall connected to the first inner wall, the light guide plate has a first surface and a second surface connected to the first surface, the first surface and the second surface respectively face the first inner wall and the second inner wall, the first inner wall and the second inner wall respectively form a second oblique space with the base plate, and the first surface and the second surface are respectively confined in the second oblique space.

17. A display device, comprising: The backlight module as described in any one of claims 1 to 16; And a display panel is mounted on the backlight module.

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