TWI879215B - Reflective structure、backlight module and display device - Google Patents

Abstract

A display device comprises a display panel disposed on a backlight module, and the backlight module has a reflective structure disposed on a substrate. The reflective structure comprises at least one first reflective cup and at least one second reflective cup engaged with each other. The first reflective cup has a fixed structure, and the second reflective cup has a combination structure that matches and combines with the fixed structure. Each of the first reflector cup and the second reflector cup includes at least one incomplete cup to form a complete reflector cup, so that the light emitted from the light source can be completely reflected to solve the problem of dark shadows in the screen.

Description

Reflective structure, backlight module and display device

The present invention relates to a reflective structure and its application, in particular to a combined reflective structure, and a backlight module and a display device comprising the aforementioned reflective structure.

The backlight module is installed on the back of the display screen to provide the light source required by the display screen.

With the trend of automobile intelligence, the required size of car screens is getting larger and larger. In order to meet the demand for large screens, the current practice is to splice multiple reflective structures together and apply them to the backlight module. However, the splicing of reflective structures may cause poor light output. For example, since the heat energy generated by the light source will cause the reflective structure to expand and contract, the expansion and contraction gap must be retained between the two adjacent reflective structures to maintain the operation of the backlight module. However, under this practice, the existence of the expansion and contraction gap will cause uneven lighting and form a dark shadow on the display screen.

Therefore, it is necessary to provide a reflective structure that can adapt to different sizes and achieve good optical quality.

Therefore, the purpose of the present invention is to provide a combined reflective structure that facilitates the assembly of at least two reflective sheets to achieve the purpose of adapting to backlight modules and display devices of different sizes.

According to the purpose of the present invention, a reflective structure is provided, comprising at least one first reflective cup and at least one second reflective cup that are engaged with each other, the first reflective cup comprising a plurality of complete cup bodies, at least one incomplete cup body, and a fixed structure extending from the edge of the first reflective cup, and the second reflective cup comprising a plurality of complete cup bodies, at least one incomplete cup body, and a combined structure that matches and combines with the fixed structure.

In some embodiments, the fixing structure has a connecting wall extending downward from the back of the first reflective cup along a height direction, and the combining structure extends upward from the bottom wall of the incomplete cup body of the second reflective cup along the height direction.

In some embodiments, the connecting wall of the fixing structure is located at the connection between one of the complete cup bodies and the incomplete cup body of the first reflective cup.

In some embodiments, the fixing structure has a head located at the end of the connecting wall, and the top surface of the coupling structure is recessed downward to form a snap-fit groove, and the contour of the snap-fit groove matches the contour of the fixing structure.

In some embodiments, the outline of the head of the fixing structure is circular, rectangular or triangular.

In some embodiments, the fixing structure is located on the back of the first reflective cup, and the fixing structure and the incomplete cup body of the first reflective cup together form a fixing slot, and the cup edge of the incomplete cup body of the second reflective cup is inserted into the fixing slot.

In some embodiments, the bonding structure has a predetermined thickness that is different from the thickness of the fixing structure.

In some embodiments, the incomplete cup body of the first reflective cup and the incomplete cup body of the second reflective cup are joined in the assembly direction to form a complete cup body.

In some embodiments, the incomplete cup body of the first reflective cup and the incomplete cup body of the second reflective cup overlap in a height direction to form a complete cup body.

Another object of the present invention is to provide a backlight module, comprising a substrate and a reflective structure as described above, wherein the reflective structure is disposed on the substrate to reflect light from a plurality of light sources disposed on the substrate.

Another object of the present invention is to provide a display device, comprising a backlight module as described above and a display panel, the display panel being arranged above the backlight module. In this way, it is possible to split a plurality of reflective sheets to adapt to backlight modules and display devices of different sizes, have good adaptability to different sizes, and achieve better optical quality.

10: Reflection structure

11: The first reflection cup

11a: Complete cup body

11b: Incomplete cup body

12: Fixed structure

12a: Connecting wall

12b: Head

13: Fixed card slot

13a: Reserve gap

W1:Thickness

L1, L2: Depth

15: Second reflection cup

15a: Complete cup body

15b: Incomplete cup body

16: Combined structure

16a: snap-fit groove

W2: Predetermined thickness

20: Substrate

21: Light source

30: Display panel

X: thickness direction

Y: length direction

Z: height direction

Figure 1 is a top view of the first embodiment of the backlight module of the present invention.

Figure 2 is a side view of the first embodiment of the backlight module of the present invention.

Figure 3 is an exploded view of the components of the first embodiment of the backlight module of the present invention from above.

Figure 4 is a top view of the second embodiment of the backlight module of the present invention.

Figure 5 is a side view of the second embodiment of the backlight module of the present invention.

Figure 6 is a top view of the third embodiment of the backlight module of the present invention.

Figure 7 is a schematic diagram of the display device of the present invention.

In order to clearly illustrate the specific implementation method, structure and effect achieved by the present invention, an embodiment is provided and illustrated as follows: Please refer to Figures 1 to 3 for a first embodiment of the backlight module of the present invention. In the first embodiment, the backlight module has a reflective structure 10 disposed on a substrate 20. The reflective structure 10 is used to reflect the light of a plurality of light sources 21 disposed on the substrate 20. The reflective structure 10 includes a first reflective cup 11 and a second reflective cup 15 that slide along a thickness direction X and engage with each other. The first reflective cup 11 includes a plurality of complete cup bodies 11a, at least one incomplete cup body 11b and a The fixing structure 12 extends from the edge of the first reflector cup 11, and the second reflector cup 15 includes a plurality of complete cup bodies 15a (the complete cup body 15a of the second reflector cup 15 is not shown in Figures 1 to 3, and please refer to Figure 6 for a schematic diagram of the complete cup body 15a of the second reflector cup 15), at least one incomplete cup body 15b, and a combining structure 16 that matches and combines with the fixing structure 12. When the first reflector cup 11 and the second reflector cup 15 are engaged, the incomplete cup body 11b of the first reflector cup 11 and the incomplete cup body 15b of the second reflector cup 15 will jointly form a complete reflector cup body to completely reflect light. In this way, the first reflector cup 11 and the second reflector cup 15 can adapt to the backlight modules and display devices of different sizes through the combination of the fixing structure 12 and the combining structure 16, which is convenient for assembling the adjacent first reflector cup 11 and the second reflector cup 15, and achieves better optical quality and has good adaptability to different sizes. It is to be noted that, in order to clearly mark the components, only two complete cup bodies 11a, two incomplete cup bodies 11b and two incomplete cup bodies 15b of the first reflector cup 11 are shown in FIG1 and FIG3 . FIG2 only shows the first reflector cup 11 having one complete cup body 11a and one incomplete cup body 11b, and the combination of the incomplete cup body 11b of the first reflector cup 11 and the incomplete cup body 15b of the second reflector cup 15 along the length direction Y angle. The complete cup body 15a of the second reflector cup 15 is omitted in FIG1 to FIG3 . In the embodiment of the present invention, the number of the complete cup body 11a and the incomplete cup body 11b of the first reflector cup 11 is equal, and the number of the complete cup body 15a and the incomplete cup body 15b of the second reflector cup 15 is equal.

The fixing structure 12 has a connecting wall 12a extending downward from the back of the first reflector cup 11 along the height direction Z, and the coupling structure 16 extends upward from the bottom wall of the incomplete cup body 15b of the second reflector cup 15 along the height direction Z. In this way, the fixing structure 12 and the coupling structure 16 are coupled at the back of the first reflector cup 11, so that the reflective surface of either one will not be affected, and the space at the back can be used to accommodate the fixing structure 12 and the coupling structure 16, so the structural strength of the two is further improved. Compared with the problem of shadow Mura caused by a gap left at the joint of two reflective sheets in the known art, the coupling position of the first reflector cup 11 and the second reflector cup 15 of the reflective structure of the present invention is not on the reflective surface of either one, and a complete cup body for reflecting light can be provided, which has better optical quality and reflection efficiency. To further explain, the fixing structure 12 includes a connecting wall 12a and a head 12b located at the end of the connecting wall 12a. The connecting wall 12a extends downward from the back of the first reflector cup 11 along the height direction Z, and the connecting wall 12a is located at the connection between the complete cup body 11a and the incomplete cup body 11b of the first reflector cup 11. The coupling structure 16 extends upward from the bottom wall of the incomplete cup body 15b of the second reflector cup 15 along the height direction Z. The coupling structure 16 has a snap-fitting groove 16a that is concave downward from its top surface along the height direction Z. The contour of the snap-fitting groove 16a matches the contour of the fixing structure 12, so that the first reflector cup 11 and the second reflector cup 15 can have better snap-fitting strength with each other.

In the embodiment of the present invention, the outline of the head 12b is rectangular, making the outline of the fixed structure 12 T-shaped, and the engaging groove 16a forms a T-shaped engaging groove 16a. Under this structure, the engaging groove 16a simultaneously limits the movement of the fixed structure 12 in the height direction Z and the length direction Y, so that the first reflective cup 11 and the second reflective cup 15 can be combined with each other without separation. In other embodiments, the outline of the head 12b may be, but is not limited to, circular or triangular, and the engaging groove 16a The outline forms a shape corresponding to the aforementioned shape, which can also achieve the effect of restricting the movement of the fixed structure 12 .

Since the backlight module generates temperature during use, the expansion and contraction space between components must be reserved in manufacturing. In the first embodiment, the combination structure 16 has a predetermined thickness W2, and the fixed structure 12 has a thickness W1, and the thickness W1 is greater than the predetermined thickness W2. In this way, when the backlight module is in use, the first reflector cup 11 and the second reflector cup 15 can still be kept in the combined state when a part of the fixed structure 12 does not completely overlap with the combination structure 16 due to thermal expansion and contraction or impact. In other embodiments, the predetermined thickness W2 of the combination structure 16 can be greater than the thickness W1 of the fixed structure 12, and the above-mentioned effect can also be achieved.

In the first embodiment of the present invention, after the first reflector cup 11 and the second reflector cup 15 are combined through the fixing structure 12 and the combining structure 16, the incomplete cup body 11b of the first reflector cup 11 and the incomplete cup body 15b of the second reflector cup 15 overlap in the height direction Z to form a complete reflector cup body, so that the combined position of the cup body of the first reflector cup 11 and the cup body of the second reflector cup 15 is not on the reflective surface of either one, thereby allowing the light emitted by the light source 21 to be completely reflected, improving the problem of screen shadows.

Please refer to Figures 4 and 5 for the second embodiment of the present invention. In the second embodiment, the fixing structure 12 is located on the back of the first reflector cup 11. The fixing structure 12 is roughly L-shaped and has a bottom wall and a side wall, so that a fixing slot 13 is formed between the fixing structure 12 and the edge of the incomplete cup body 11b of the first reflector cup 11, so that the edge of the incomplete cup body 15b of the second reflector cup 15 can be inserted into the fixing slot 13, so that the first reflector cup 11 clamps the second reflector cup 15. In order to clearly mark the components, FIG. 4 only shows two complete cup bodies 11a, two incomplete cup bodies 11b of the first reflector cup 11, and two incomplete cup bodies 15b of the second reflector cup 15. FIG. 5 shows only the state in which the first reflector cup 11 has one complete cup body 11a and one incomplete cup body 11b combined with the incomplete cup body 15b of the second reflector cup 15 along the length direction Y viewing angle. FIG. 4 and FIG. 5 omit the complete cup body 15a of the second reflector cup 15. Please refer to FIG. 6 for the schematic diagram of the complete cup body 15a of the second reflector cup 15. In the second embodiment, the number of the complete cup body 11a and the incomplete cup body 11b of the first reflector cup 11 is equal, and the number of the complete cup body 15a and the incomplete cup body 15b of the second reflector cup 15 is equal. To further explain, the fixed slot 13 has a depth L1, which is greater than the depth L2 of the cup edge of the incomplete cup body 15b of the second reflective cup 15 inserted into the fixed slot 13. When a portion of the cup edge of the incomplete cup body 15b of the second reflective cup 15 is inserted into the fixed slot 13, a reserved gap 13a is formed between the cup edge and the bottom wall of the fixed structure 12. When the temperature of the backlight module rises during use, the reserved gap 13a allows a portion of the cup edge of the incomplete cup body 15b of the second reflective cup 15 inserted into the fixed slot 13 to deform due to the high temperature, and keeps the first reflective cup 11 and the second reflective cup 15 in a clamped state.

In the second embodiment of the present invention, after the first reflector cup 11 and the second reflector cup 15 are combined through the fixing structure 12 and the combining structure 16, the incomplete cup body 11b of the first reflector cup 11 and the incomplete cup body 15b of the second reflector cup 15 together form a complete reflector cup body, so that the combined position between the cup body of the first reflector cup 11 and the cup body of the second reflector cup 15 is not on the reflective surface of either one, thereby allowing the light emitted by the light source 21 to be completely reflected, improving the problem of screen shadows.

Please refer to FIG. 6 for the third embodiment of the present invention. In the third embodiment, the first reflector 11 is shown to have two complete cup bodies 11a and two incomplete cup bodies 11b, and the second reflector 15 is shown to have two complete cup bodies 15a and two incomplete cup bodies 15b. The incomplete cup body 11b of the first reflector 11 is connected to the incomplete cup body 15b of the second reflector 15 through the fixing structure 12 located on the back of the first reflector 11 and the connecting structure 16 extending upward from the bottom wall of the incomplete cup body 15b of the second reflector 15 to form a complete cup body. In this way, the fixing structure 12 and the connecting structure 16 are connected on the back of the first reflector 11, so that the reflecting surface of either one will not be affected, and the space on the back can be used to accommodate the fixing structure 12 and the connecting structure 16, so the structural strength of the two is further improved. For example, when the deformation of the first reflector 11 and the second reflector 15 is small enough to be ignored, it is possible to achieve no expansion/contraction gap between the first reflector 11 and the second reflector 15, thereby improving the screen shadow problem. The focus is on the reflective surfaces of the first reflector 11 and the second reflector 15 being on the same horizontal plane after assembly, so that the light emitted by the light source 21 is completely reflected by the reflective surfaces of the first reflector 11 and the second reflector 15 after passing through the same distance of the optical path, thereby improving the optical quality.

Please refer to FIG. 7 for a schematic diagram of the display device of the present invention, which has a display panel 30 located above a backlight module. The backlight module has a reflective structure 10 disposed on a substrate 20. The reflective structure 10 is used to reflect light from a plurality of light sources 21 disposed on the substrate 20. The reflective structure 10 includes at least one first reflective cup 11 and at least one second reflective cup 15 that slide along a thickness direction X and engage with each other. The display device in this embodiment can select any one of the reflective structures 10 in the first to third embodiments as required, which will not be described in detail here.

The present invention is to make the first reflector cup 11 and the second reflector cup 15 engage with each other by connecting the fixing structure 12 of the first reflector cup 11 of the reflective structure with the connecting structure 16 of the second reflector cup 15, so that the incomplete cup body 11b of the first reflector cup 11 and the incomplete cup body 15b of the second reflector cup 15 together form a complete reflector cup body, so that the light emitted by the light source 21 can be completely reflected, thereby improving the problem of screen shadows. In addition, the reflective structure of the present invention can be directly produced using existing molds, eliminating the need to re-purchase large-size molds, and the backlight module equipped with the reflective structure of the present invention can be applied to large-size direct-type vehicle-mounted models, or other situations where large-size display devices may be applied, and is not limited to vehicle-mounted display devices.

The above disclosed implementation forms are only exemplary of the principles, features and effects of the present invention, and are not intended to limit the scope of implementation of the present invention. Anyone familiar with this technology can modify and change the above implementation forms without violating the spirit and scope of the present invention. Any equivalent changes and modifications completed by using the contents disclosed in the present invention should still be covered by the scope of the patent application below.

10: Reflection structure

11: The first reflection cup

11a: Complete cup body

11b: Incomplete cup body

12: Fixed structure

15: Second reflection cup

16: Combined structure

20: Substrate

21: Light source

X: thickness direction

Y: length direction

Z: height direction

Claims (11)

A reflective structure, comprising: At least one first reflective cup and at least one second reflective cup are engaged with each other, the first reflective cup comprises a plurality of complete cup bodies, at least one incomplete cup body and a fixed structure extending from the edge of the first reflective cup, the second reflective cup comprises a plurality of complete cup bodies, at least one incomplete cup body and a combined structure matched and combined with the fixed structure. The reflective structure as described in claim 1, wherein the fixing structure has a connecting wall extending downward along a height direction from the back side of the first reflective cup, and the combining structure extends upward along the height direction from the bottom wall of the incomplete cup body of the second reflective cup. A reflective structure as described in claim 2, wherein the connecting wall of the fixing structure is located at the connection between one of the complete cup bodies and the incomplete cup body of the first reflective cup. A reflective structure as described in claim 2, wherein the fixing structure has a head located at the end of the connecting wall, and the combining structure is recessed downward on its top surface to form a snap-fit groove, and the contour of the snap-fit groove matches the contour of the fixing structure. A reflective structure as described in claim 4, wherein the outline of the head of the fixed structure is circular, rectangular or triangular. The reflective structure as described in claim 1, wherein the fixing structure is located on the back of the first reflective cup, and the fixing structure and the incomplete cup body of the first reflective cup together form a fixing slot, and the cup edge of the incomplete cup body of the second reflective cup is inserted into the fixing slot. A reflective structure as described in claim 1, wherein the combined structure has a predetermined thickness, which is different from the thickness of the fixed structure. The reflective structure as described in claim 1, wherein the incomplete cup body of the first reflective cup and the incomplete cup body of the second reflective cup are joined in an assembly direction to form a complete cup body together. The reflective structure as described in claim 1, wherein the incomplete cup body of the first reflective cup and the incomplete cup body of the second reflective cup overlap in a height direction to form a complete cup body. A backlight module comprises: a substrate; and at least one reflective structure as described in any one of claims 1 to 9, the reflective structure being disposed on the substrate to reflect light from a plurality of light sources disposed on the substrate. A display device comprises a backlight module as described in claim 10; and a display panel disposed above the backlight module.

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