TWI426330B - A backlight module and a display device including the backlight module - Google Patents

Description

Backlight module and display device including the same

The present invention relates to a backlight module and a display device including the same, and more particularly to a backlight module capable of local dimming and a display device including the same.

Referring to FIG. 1A, a perspective exploded view of a conventional display device is shown. Referring to Figure 1B, a schematic cross-sectional view of a conventional display device is shown. The display device 1 includes a backlight module 10, a display panel 16, a signal processor (not shown), and a plurality of controllers (not shown). The backlight module 10 includes a back plate 11 , a reflective sheet 12 , a light guide plate 13 , a plurality of LEDs 14 , and at least one diaphragm 15 . The backplane 11 is an aluminum backplane, which is the main frame of the backlight module 10 for accommodating the reflective sheet 12, the light guide plate 13, the LEDs 14 and the diaphragm 15. The reflection sheets 12 are attached to the back sheet 11 in a manner of being attached, which is a whole sheet of reflection sheets. The light guide plate 13 is disposed above the reflection sheet 12 and has at least one light incident surface (peripheral surface).

The LEDs 14 are attached to the light guide plate 13 with respect to the light incident surface of the light guide plate 13. The diaphragm 15 is disposed on the light guide plate 13. The display panel 16 is disposed above the diaphragm 15 of the backlight module 10 . The signal processor is configured to convert a video signal into a control signal (including a luminance signal and a display signal). The controller is electrically connected to the signal processor, the display panel 16 and the LEDs 14 of the backlight module 10 for receiving the control signal (including the brightness signal and the display signal), and driving the backlight according to the brightness signal. The LED 14 of the module drives the display panel 16 according to the display signal.

The display device 1 can use the controller to control the brightness of the portion of the LED 14 to locally dim the backlight module 10. Taking FIG. 1A as an example, if the video signal is to be displayed in the upper right side and the other areas are dark, the controller 14 controls the LED 14 located on the upper right side of the light guide plate 13 to be bright, and the other LEDs 14 It is dark. Similarly, the above method can also control the brightness and darkness of other specific small areas of the light guide plate 13 to achieve the function of local dimming, thereby reducing waste of energy.

A disadvantage of the display device 1 is that its local dimming function is not good. In the above example, when the LEDs 14 located outside the top surface of the light guide plate 13 are bright, the light emitted by the LEDs 14 will advance to the lower side of the light guide plate 13, and the lower half of the light guide plate 13 will be made. And can't get very dark.

In addition, another prior art system uses the pixels in the display panel 16 to control the angle of the liquid crystal by using a voltage or a current to determine the angle of the opening to achieve local dimming. However, because pixels have light leakage problems, The above-mentioned use of the adjustment pixel as a means of local dimming is not effective, and the backlight mode must be in a normally open state, which does not conform to the trend of energy saving.

Therefore, it is necessary to provide an innovative and progressive backlight module and a display device including the same to solve the above problems.

The present invention provides a backlight module including a back plate, at least one reflective structure, a plurality of light guide plates, a plurality of auxiliary reflective structures, and a plurality of light sources. The at least one reflective structure is located on the backplane. The light guide plates are disposed on the at least one reflective structure. Each of the light guide plates has at least one inner side surface and at least one light incident surface. The light guide plates are spaced apart from each other to form at least one second gap. The auxiliary reflective structures are located on the inner sides. The light source faces are incident on the light incident surface of the light guide plates. In this way, the best local dimming function can be achieved.

The invention further provides a backlight module, which comprises a back plate, at least one reflective structure, a light guide plate and a plurality of light sources. The at least one reflective structure is located on the backplane. The light guide plate is located above the at least one reflective structure, the light guide plate has a light exit surface, the light exit surface has at least one groove, the at least one groove divides the light guide plate into a plurality of blocks, and each of the blocks has At least one goes into the glossy side. The light source faces are incident on the light side of the blocks. In this way, the best local dimming function can be achieved.

The invention further provides a display device comprising a backlight module, a display panel, a signal processor and a plurality of controllers. The backlight module is one of the backlight modules as described above. The display panel is oppositely disposed on the backlight module. The signal processor is configured to convert a video signal into a control signal. The controller is electrically connected to the signal processor, the backlight module and the display panel for receiving the control signal and driving the backlight module and the display panel according to the control signal.

Referring to Figure 2A, there is shown a perspective exploded view of a first embodiment of the display device of the present invention. Referring to Figure 2B, a cross-sectional view of a first embodiment of a display device of the present invention is shown. The display device 2 includes a backlight module 20, a display panel 251, a signal processor (not shown), and a plurality of controllers (not shown).

It is emphasized that the backlight module 20 includes a back plate 21, at least one reflective structure (a first reflective structure 22A and a second reflective structure 22B), at least one auxiliary light source 26, and a plurality of light guide plates (a first a light guide plate 23A and a second light guide plate 23B), a plurality of auxiliary reflection structures (a first auxiliary reflection structure 27A and a second auxiliary reflection structure 27B), a plurality of light sources (a plurality of first light sources 24A and a plurality of Two light sources 24B) and at least one diaphragm 25. The backplane 21 can be an aluminum backplane or any backplane formed by the material of the backlight module 20, and is a main frame of the backlight module 20 for accommodating the reflective structures and the at least one auxiliary light source. 26. The light guide plate, the auxiliary reflective structures, the light sources, and the diaphragm 25.

In this embodiment, the at least one reflective structure is a plurality of reflective structures, and includes a first reflective structure 22A and a second reflective structure 22B, which are located on the back plate 21. The first reflective structure 22A and the second reflective structure 22B are spaced apart from each other to form a first gap 28. The auxiliary light source 26 is a plurality of LEDs located on the back plate 21 and located in the first gap 28.

The light guide plate includes a first light guide plate 23A and a second light guide plate 23B respectively disposed corresponding to the reflective structures. That is, the first light guide plate 23A corresponds to the first reflective structure 22A, and the second light guide plate 23B corresponds to the second reflective structure 22B. Preferably, the size of the first light guide plate 23A is the same as the size of the second light guide plate 23B. The first light guide plate 23A has a first inner side surface 232A and at least one first light incident surface 231A. The first inner side surface 232A and the first light incident surface 231A are disposed around the first light guide plate 23A. The second light guide plate 23B has a second inner side 232B and at least one second light incident surface 231B, wherein the second inner side surface 232B and the second light incident surface 231B are disposed around the second light guide plate 23B. The light guide plates are spaced apart from each other to form at least one second gap 29. In the embodiment, the first inner side surface 232A faces the second inner side surface 232B to form the second gap 29. The position of the first gap 28 corresponds to the position of the second gap 29, and the first gap 28 and the second gap 29 are all in a straight line shape.

The auxiliary reflective structures are located on the inner sides. In this embodiment, the auxiliary reflective structures include a first auxiliary reflective structure 27A and a second auxiliary reflective structure 27B, and the first auxiliary reflective structure 27A is located on the first inner side surface 232A, and the second auxiliary reflective structure 27B is located on the second inner side 232B. In this embodiment, the reflective structures (the first reflective structure 22A and the second reflective structure 22B) and the auxiliary reflective structures (the first auxiliary reflective structure 27A and the second auxiliary reflective structure 27B) are reflected Sheet or reflective film. However, it will be understood that the reflective structures and the auxiliary reflective structures may also be microstructures.

The light source faces are incident on the light incident surface of the light guide plates. In this embodiment, the light sources include a plurality of first light sources 24A and a plurality of second light sources 24B, and the first light sources 24A face the first light incident surface 231A of the first light guide plate 23A. The two light sources 24B face the second light incident surface 231B of the second light guide plate 23B. In this embodiment, the light sources (the first light source 24A and the second light sources 24B) are LEDs, and the output power of the auxiliary light source 26 when turned on is smaller than the light sources (the first light sources) 24A and the second light source 24B) turn on the output power to avoid over-lighting of the auxiliary light source 26 And cause a bright band.

In addition, the film 25 (for example, a brightness enhancement film, a diffusion film, etc.) is disposed on the light guide plates (the first light guide plate 23A and the second light guide plate 23B), which is a whole film. The first light guide plate 23A and the second light guide plate 23B are covered. The display panel 251 is disposed above the diaphragm 25 of the backlight module 20 .

The signal processor is configured to convert a video signal into a control signal (including a luminance signal and a display signal). The controllers are electrically connected to the signal processor, the display panel 251, and the light source of the backlight module 20 (the first light source 24A and the second light source 24B) and the auxiliary light source 26, Receiving the control signal (including the brightness signal and the display signal), and selectively controlling the gray level brightness of the auxiliary light source 26, the light sources or some of the light sources according to the brightness signal, and driving the display according to the display signal Panel 251.

In this embodiment, since the first light guide plate 23A and the second light guide plate 23B are separated from each other by the second gap 29, a better local dimming function can be achieved. Moreover, due to the reflection of the first auxiliary reflective structure 27A and the second auxiliary reflective structure 27B, the local dimming function can be optimized, that is, for example, the first light source 24A emits Light does not enter the second light guide plate 23B. In addition, in order to make up for the second gap 29, the dark band may be caused when the entire screen is completely bright. The auxiliary light source 26 is only illuminated when the first light source 24A and the second light source 24B are both bright or A light source 24A and the second light sources are illuminated when a predetermined brightness gray level value is reached.

In the present embodiment, the first light source 24A is located on the outer surface of the top surface and the outer surface of the first light guide plate 23A, and the second light source 24B is located on the bottom surface and the outer surface of the second light guide plate 23B. The periphery of the side. In other embodiments, the first light sources 24A are located only on the periphery of the top surface of the first light guide plate 23A, and the second light sources 24B are located only on the periphery of the bottom surface of the second light guide plate 23B, as shown in FIG. The second embodiment shown.

In this embodiment, the at least one reflective structure is a plurality of reflective structures. However, in other embodiments, the at least one reflective structure may also be a whole reflective structure (without the first gap 28). The auxiliary light source 26 is located on the reflective structure, and the position of the auxiliary light source 26 corresponds to the position of the second gap 29.

Referring to Figure 4A, there is shown a perspective exploded view of a third embodiment of the display device of the present invention. Referring to Figure 4B, a cross-sectional view of a third embodiment of the display device of the present invention is shown. The display device 3 includes a backlight module 30, a display panel 351, a signal processor (not shown), and a plurality of controllers (not shown).

It is emphasized that the backlight module 30 includes a back plate 31, at least one reflective structure, at least one auxiliary light source 36, a plurality of light guide plates, a plurality of auxiliary reflective structures, a plurality of light sources, and at least one film 35. The backplane 31 can be an aluminum backplane or other material capable of supporting the backlight module 30, and is a main frame of the backlight module 30 for accommodating the reflective structures, the at least one auxiliary light source 36, The light guide plate, the auxiliary reflective structures, the light sources, and the diaphragm 35.

In this embodiment, the at least one reflective structure is a plurality of reflective junctions The structure includes a first reflective structure 32A, a second reflective structure 32B, a third reflective structure 32C and a fourth reflective structure 32D, which are located on the back plate 31. The first reflective structure 32A, the second reflective structure 32B, the third reflective structure 32C, and the fourth reflective structure 32D are spaced apart from each other to form a first gap 38. The first gap 38 is in the shape of a cross. The auxiliary light source 36 is a plurality of LEDs located on the back plate 31 and located in the first gap 38.

The light guide plate includes a first light guide plate 33A, a second light guide plate 33B, a third light guide plate 33C and a fourth light guide plate 33D, which are respectively disposed above the reflective structures. That is, the first light guide plate 33A corresponds to the first reflective structure 32A, and the second light guide plate 33B corresponds to the second reflective structure 32B. The third light guide plate 33C corresponds to the third reflective structure 32C, and the fourth light guide plate 33D Corresponding to the fourth reflective structure 32D. Preferably, the first light guide plate 33A, the second light guide plate 33B, the third light guide plate 33C, and the fourth light guide plate 33D are all the same size.

The first light guide plate 33A has two first inner side surfaces 332A and at least one first light incident surface 331A. The second light guide plate 33B has two second inner side surfaces 332B and at least one second light incident surface 331B. The third light guide plate 33C has two third inner side surfaces 332C and at least one third light incident surface 331C. The fourth light guide plate 33D has two fourth inner side surfaces 331D and at least one fourth light incident surface 332D. The light guide plates are spaced apart from each other to form at least one second gap 39. The second gap 39 is in the shape of a cross. In this embodiment, the first inner side surface 332A, the second inner side surface 332B, the third inner side surface 332C, and the fourth inner side surface 331D face each other to form the second gap 39. The first The position of a gap 38 corresponds to the position of the second gap 39.

The auxiliary reflective structures include a first auxiliary reflective structure 37A, a second auxiliary reflective structure 37B, a third auxiliary reflective structure 37C, and a fourth auxiliary reflective structure 37D. The first auxiliary reflective structure 37A is located on the first inner side surface 332A, the second auxiliary reflective structure 37B is located on the second inner side surface 332B, and the third auxiliary reflective structure 37C is located on the third inner side surface 332C. Four auxiliary reflection structures 37D are located on the fourth inner side surfaces 331D. In this embodiment, the reflective structures and the auxiliary reflective structures are reflective sheets or reflective films. However, it will be understood that the reflective structures and the auxiliary reflective structures may also be microstructures.

The light sources include a plurality of first light sources 34A, a plurality of second light sources 34B, a plurality of third light sources 34C, and a plurality of fourth light sources 34D. The first light source 34A faces the first light incident surface 331A of the first light guide plate 33A, and the second light source 34B faces the second light incident surface 331B of the second light guide plate 33B. The light source 34C faces the third light incident surface 331C of the third light guide plate 33C, and the fourth light source 34D faces the fourth light incident surface 332D of the fourth light guide plate 33D. In this embodiment, the light sources are LEDs, and the output power when the auxiliary light source 36 is turned on is smaller than the output when the light sources are turned on to avoid bright bands caused by the auxiliary light source 36 being too bright.

The diaphragm 35 (for example, a brightness enhancement film, a diffusion film, etc.) is disposed on the light guide plates, which is a whole film, and covers the light guide plates. The display panel 351 is disposed above the diaphragm 35 of the backlight module 30 .

The signal processor is configured to convert a video signal into a control signal (including a luminance signal and a display signal). The controllers are electrically connected to the signal The light source (the first light source 34A, the second light source 34B, the third light source 34C and the fourth light source 34D) and the auxiliary light source of the display panel 351 and the backlight module 30 The light source 26 is configured to receive the control signal (including the brightness signal and the display signal), and selectively control the gray level brightness of the auxiliary light source 36, the light sources or some of the light sources according to the brightness signal, and according to the display The signal drives the display panel 351.

In this embodiment, since the first light guide plate 33A, the second light guide plate 33B, the third light guide plate 33C, and the fourth light guide plate 33D are separated from each other by the second gap 39, a better local dimming can be achieved. Features. Moreover, the local dimming function can be optimized by the reflection of the auxiliary reflective structures, that is, for example, the light emitted by the first light sources 34A is only in the first light guide plate 33A. Inside, but not at all other light guides. In addition, in the embodiment, the auxiliary light source is controlled by the auxiliary light source located in the first gap formed by two adjacent reflective structures corresponding to the two adjacent light guide plates. When the light sources of the light incident surfaces of the two adjacent light guide plates are all bright, the light sources of the light incident surfaces of the two adjacent light guide plates are illuminated when the light source reaches a preset brightness gray level value. For example, when the first light source 34A and the third light source 34C are both bright, the auxiliary light source 36 located between the first light guide plate 33A and the third light guide plate 33C is bright. Or when the brightness of the first light source 34A and the third light source 34C reaches a predetermined value, the auxiliary light source 36 located between the first light guide plate 33A and the third light guide plate 33C is bright.

In this embodiment, the first light sources 34A are located at the periphery of the top surface and the outer surface of the first light guide plate 33A, and the second light sources 34B are located at the periphery. The third light source 34C is located at the periphery of the bottom surface and the outer side surface of the third light guide plate 33C, and the fourth light source 34D is located at the fourth light guide plate 33D. The periphery of the bottom and outer sides. In other embodiments, the first light sources 34A are located only on the periphery of the top surface of the first light guide plate 33A, and the second light sources 34B are located only on the periphery of the top surface of the second light guide plate 33B. The three light sources 34C are located only on the periphery of the bottom surface of the third light guide plate 33C, and the fourth light sources 34D are located only on the periphery of the bottom surface of the fourth light guide plate 33D.

In this embodiment, the at least one reflective structure is a plurality of reflective structures. However, in other embodiments, the at least one reflective structure may also be a whole reflective structure (without the first gap 38). The auxiliary light source 36 is located on the reflective structure, and the position of the auxiliary light source 36 corresponds to the position of the second gap 39.

Referring to Fig. 5, there is shown a front view showing the distribution of the light guide plate of the fourth embodiment of the display device of the present invention. In the present invention, the number of the light guide plates may be n, and the number of the reflective structures is also n, preferably 2n, and the number of the reflective structures is also 2n, wherein n is Integer (n = 1, 2, 3...), the light guide plates are arranged in a 2 x n matrix, and the reflective structures are also arranged in a 2 x n matrix. In the first embodiment described above (Fig. 2A), the light guide plates and the reflective structures are respectively arranged in a 2 x 1 matrix. In the third embodiment (Fig. 4A) described above, the light guide plates and the reflective structures are respectively arranged in a 2 x 2 matrix. In the display device 4 of the present embodiment, the light guide plates 43 and the reflective structures (not shown) are respectively arranged in a 2×3 matrix, and the light sources 44 are respectively located in the light guide plates 43. The periphery of the top or bottom surface. And so on, in other embodiments, the light guide plates and the reflective structures may be arranged in a 2×4 matrix, a 2×5 matrix or a 2×6 matrix or other 2×n matrix, respectively.

Referring to Figure 6A, there is shown a perspective exploded view of a fifth embodiment of the display device of the present invention. Referring to Figure 6B, a cross-sectional view showing a fifth embodiment of the display device of the present invention is shown. The display device 5 includes a backlight module 50, a display panel 551, a signal processor (not shown), and a plurality of controllers (not shown).

It is emphasized that the backlight module 50 includes a back plate 51, at least one reflective structure (a first reflective structure 52A and a second reflective structure 52B), at least one auxiliary light source 56, a light guide plate 53, and a plurality of A light source (a plurality of first light sources 54A and a plurality of second light sources 54B) and at least one diaphragm 55. The backplane 51 can be an aluminum backplane or any backplane formed by the material of the backlight module 50, and is a main frame of the backlight module 50 for accommodating the reflective structures and the at least one auxiliary light source. 56. The light guide plate 53, the light source and the diaphragm 55.

In this embodiment, the at least one reflective structure is a plurality of reflective structures, and includes a first reflective structure 52A and a second reflective structure 52B, which are located on the back plate 51. The first reflective structure 52A and the second reflective structure 52B are spaced apart from each other to form a gap 58. In this embodiment, the reflective structures are reflective sheets or reflective films. However, it will be understood that the reflective structures may also be microstructures. The auxiliary light source 56 is a plurality of LEDs located on the backing plate 51 and located within the gap 58.

The light guide plate 53 is a whole piece of light guide plate located in the reflective structure Above. The light guide plate 53 has a light-emitting surface (the surface facing the lower left in FIG. 6A), and the light-emitting surface has at least one groove 59. The at least one groove 59 divides the light guide plate 53 into a plurality of blocks (for example, the first region). Block 53A and second block 53B), and the blocks are respectively disposed above the reflective structures. That is, the first block 53A corresponds to the first reflective structure 52A, and the second block 53B corresponds to the second reflective structure 52B. Preferably, the size of the first block 53A is the same as the size of the second block 53B. Each of the blocks has at least one light incident surface, that is, the first block 53A has at least one first light incident surface 531A, and the second block 53B has at least one second light incident surface 531B.

The position of the at least one groove 59 corresponds to the position of the gap 58. In this embodiment, the gap 58 and the at least one groove 59 are all in a straight line shape, and the number of the grooves may be a plurality of strips. Preferably, the depth of the groove 59 is greater than one half of the thickness of the light guide plate 53.

The light source faces are incident on the light side of the blocks. In this embodiment, the light sources include a plurality of first light sources 54A and a plurality of second light sources 54B. The first light sources 54A face the first light incident surface 531A of the first block 53A. The two light sources 54B face the second light incident surface 531B of the second block 53B. In this embodiment, the light sources (the first light source 54A and the second light source 54B) are LEDs, and the output power of the auxiliary light source 56 is smaller than the light sources (the first light sources 54A and The output power of the second light source 54B) is turned on to avoid bright band caused by the auxiliary light source 56 being too bright.

The diaphragm 55 (for example, a brightness enhancement film, a diffusion film, or the like) is disposed on the light guide plate 53. The display panel 551 is opposite to the diaphragm disposed on the backlight module 50. Above the 55.

The signal processor is configured to convert a video signal into a control signal (including a luminance signal and a display signal). The controllers are electrically connected to the signal processor, the display panel 551 and the light source of the backlight module 50 (the first light source 54A and the second light source 54B) and the auxiliary light source 56. Receiving the control signal (including the brightness signal and the display signal), and selectively controlling the gray level brightness of the auxiliary light source 56, the light sources or some of the light sources according to the brightness signal, and driving the display according to the display signal Panel 551.

In this embodiment, since the first block 53A and the second block 53B are separated by the at least one groove 59, a better local dimming function can be achieved. In addition, in order to compensate for the fact that the at least one groove 59 may cause a dark band when the entire screen is completely bright, the auxiliary light source 56 is only illuminated when the first light source 54A and the second light source 54B are both bright, or The light sources of the light incident surfaces of the two adjacent blocks are illuminated when a preset gray scale value is reached.

In this embodiment, the first light source 54A is located at the periphery of the top surface and the outer surface of the first block 53A, and the second light sources 54B are located on the bottom surface and the second surface of the second block 53B. The periphery of the side. In other embodiments, the first light sources 54A are only located on the periphery of the top surface of the first block 53A, and the second light sources 54B are located only on the periphery of the bottom surface of the second block 53B.

In this embodiment, the at least one reflective structure is a plurality of reflective structures. However, in other embodiments, the at least one reflective structure may also be a whole reflective structure (without the gap 58). 56 is located in the The position of the auxiliary light source 56 corresponds to the position of the second gap 59.

In the present invention, the number of the blocks may be n, the reflection structures are corresponding to n, preferably the number of blocks is 2n, and the number of the reflection structures is also 2n, wherein n is For integers (n = 1, 2, 3...), the blocks are arranged in a 2 x n matrix, and the reflection structures are also arranged in a 2 x n matrix. In the fifth embodiment described above (Fig. 6A), the blocks and the reflective structures are respectively arranged in a 2 x 1 matrix. In other embodiments, the blocks and the reflective structures may be respectively arranged in a 2×2 matrix, that is, the reflective structures include a first reflective structure, a second reflective structure, and a first reflective structure. A three-reflection structure and a fourth reflection structure. The first reflective structure, the second reflective structure, the third reflective structure, and the third reflective structure are spaced apart from each other to form the gap, and the gap is a cross. The blocks include a first block, a second block, a third block, and a fourth block. The first block is located above the first reflective structure and has at least one first light incident surface, the second block is located above the second reflective structure and has at least one second light incident surface, the third block is located at Above the third reflective structure and having at least one third light incident surface, the fourth block is located above the fourth reflective structure and has at least one fourth light incident surface. The first block, the second block, the third block and the fourth block are the grooves, and the groove is in the shape of a cross, and the position of the gap corresponds to the position of the groove. The light sources include a plurality of first light sources, a plurality of second light sources, a plurality of third light sources, and a plurality of fourth light sources. The first light source surface is opposite to at least one first light incident surface of the first block, and the second light source surfaces are at least one second of the second block The light incident surface, the third light source surface is opposite to at least one third light incident surface of the third block, and the fourth light source surface is opposite to at least one fourth light incident surface of the fourth block.

Furthermore, the blocks and the reflective structures may be arranged in a 2 x 3 matrix, a 2 x 4 matrix, a 2 x 5 matrix or a 2 x 6 matrix or other 2 x n matrices, respectively.

It is to be understood from the above embodiments that the light sources (such as the first light source 24A and the second light source 24B in FIG. 2A) may be disposed on any of the light incident surfaces of the light guide plates, or any two Adjacent to the glossy surface or any two opposite entrances.

It should be noted that the light source and the auxiliary light source described in the above embodiments and figures are merely illustrative, and it is conceivable that the light source or the auxiliary light source may be a light emitting diode (LED) or a light strip (LED). Light bar) or cold cathode ray tube (CCFL) or a combination thereof achieves the efficacy of the present invention.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the scope of the present invention. The scope of the invention should be as set forth in the appended claims.

1‧‧‧Study display device

2‧‧‧First embodiment of the display device of the present invention

3‧‧‧ Third embodiment of the display device of the present invention

4‧‧‧Fourth embodiment of the display device of the present invention

5‧‧‧Fourth embodiment of the display device of the present invention

10‧‧‧Backlight module

11‧‧‧ Backboard

12‧‧‧reflector

13‧‧‧Light guide plate

14‧‧‧LED

15‧‧‧ diaphragm

16‧‧‧ display panel

20‧‧‧Backlight module

21‧‧‧ Backplane

22A‧‧‧First reflection structure

22B‧‧‧second reflection structure

23A‧‧‧First light guide

23B‧‧‧Second light guide

24A‧‧‧First light source

24B‧‧‧second light source

25‧‧‧ diaphragm

26‧‧‧Auxiliary light source

27A‧‧‧First auxiliary reflective structure

27B‧‧‧Second auxiliary reflective structure

28‧‧‧First gap

29‧‧‧Second gap

30‧‧‧Backlight module

31‧‧‧ Backplane

32A‧‧‧First reflection structure

32B‧‧‧second reflection structure

32C‧‧‧ Third reflection structure

32D‧‧‧fourth reflection structure

33A‧‧‧First light guide

33B‧‧‧Second light guide

33C‧‧‧third light guide

33D‧‧‧fourth light guide

34A‧‧‧First light source

34B‧‧‧second light source

34C‧‧‧ Third light source

34D‧‧‧fourth light source

35‧‧‧ diaphragm

36‧‧‧Auxiliary light source

37A‧‧‧First auxiliary reflective structure

37B‧‧‧Second auxiliary reflective structure

37C‧‧‧ Third auxiliary reflection structure

37D‧‧‧fourth auxiliary reflection structure

38‧‧‧First gap

39‧‧‧Second gap

43‧‧‧Light guide plate

44‧‧‧Light source

50‧‧‧Backlight module

51‧‧‧ Backplane

52A‧‧‧First reflection structure

52B‧‧‧second reflection structure

53‧‧‧Light guide plate

53A‧‧‧First Block

53B‧‧‧Second block

54A‧‧‧First light source

54B‧‧‧second light source

55‧‧‧ diaphragm

56‧‧‧Auxiliary light source

58‧‧‧ gap

59‧‧‧ Groove

231A‧‧‧First light surface

231B‧‧‧Second entrance

232A‧‧‧ first inner side

232B‧‧‧Second inner side

251‧‧‧ display panel

331A‧‧‧ first light surface

331B‧‧‧Second entrance

331C‧‧‧ third entrance

331D‧‧‧4th inner side

332A‧‧‧ first inner side

332B‧‧‧Second inner side

332C‧‧‧ third inner side

332D‧‧‧Fourth entry

351‧‧‧ display panel

531A‧‧‧first light surface

531B‧‧‧Second entrance

551‧‧‧ display panel

1A is a schematic exploded perspective view of a conventional display device; FIG. 1B is a schematic cross-sectional view showing a conventional display device; FIG. 2A is a perspective exploded view showing a first embodiment of the display device of the present invention; 1 is a schematic cross-sectional view; FIG. 3 is a perspective exploded view showing a second embodiment of the display device of the present invention Figure 4A is a perspective exploded view showing a third embodiment of the display device of the present invention; Figure 4B is a cross-sectional view showing a third embodiment of the display device of the present invention; and Figure 5 is a view showing a light guide plate of a fourth embodiment of the display device of the present invention. FIG. 6A is a perspective exploded view showing a fifth embodiment of the display device of the present invention; and FIG. 6B is a cross-sectional view showing a fifth embodiment of the display device of the present invention.

2. . . First embodiment of the display device of the present invention

20. . . Backlight module

twenty one. . . Backplane

22A. . . First reflective structure

22B. . . Second reflective structure

23A. . . First light guide

23B. . . Second light guide

24A. . . First light source

24B. . . Second light source

25. . . Diaphragm

26. . . Auxiliary light source

27A. . . First auxiliary reflection structure

27B. . . Second auxiliary reflection structure

28. . . First gap

29. . . Second gap

231A. . . First entrance surface

231B. . . Second entrance surface

232A. . . First inner side

232B. . . Second inner side

251. . . Display panel

Claims (19)

A backlight module includes: a back plate; at least one reflective structure on the back plate; a plurality of light guide plates disposed above the at least one reflective structure, each light guide plate having at least one inner side surface and at least one light incident a surface, wherein the inner side surface and the light incident surface are disposed at a periphery of the light guide plate, the light guide plates are spaced apart from each other to form at least one second gap; a plurality of auxiliary reflective structures are located on the inner side surfaces; and a plurality of light sources , the surface of the light guide plate for the light guide plate. The backlight module of claim 1, wherein the at least one reflective structure is a plurality of reflective structures, the reflective structures are spaced apart from each other to form at least one first gap, and the backlight module further comprises at least one auxiliary light source on the back The plate is located in the first gap, wherein the position of the first gap corresponds to the position of the second gap, and the inner sides are opposite to each other. The backlight module of claim 2, wherein the output power of the auxiliary light source is less than the output power of the light sources. The backlight module of claim 1, wherein the at least one reflective structure is a whole reflective structure, and the backlight module further comprises at least one auxiliary light source located on the reflective structure, wherein the position of the auxiliary light source corresponds to The position of the second gap, and the inner sides are opposite each other. The backlight module of claim 4, wherein the output power of the auxiliary light source is less than the output power of the light sources. The backlight module of claim 1, wherein the reflective structures and the auxiliary The reflective structure is a reflective sheet. The backlight module of claim 2, wherein the reflective structure comprises a first reflective structure and a second reflective structure, the first reflective structure and the second reflective structure being spaced apart from each other to form the first gap, the isotropic The light guide plate includes a first light guide plate and a second light guide plate. The first light guide plate has a first inner side surface and at least one first light incident surface. The second light guide plate has a second inner side surface and at least one second The first inner side faces the second inner side to form the second gap, the first gap and the second gap are all in a straight line shape, and the auxiliary reflective structures comprise a first auxiliary reflective structure And a second auxiliary reflective structure, the first auxiliary reflective structure is located on the first inner side surface, the second auxiliary reflective structure is located on the second inner side surface, and the light sources comprise a plurality of first light sources and a plurality of second light sources. The first light source faces at least one first light incident surface of the first light guide plate, and the second light sources face at least one second light incident surface of the second light guide plate. The backlight module of claim 2, wherein the reflective structure comprises a first reflective structure, a second reflective structure, a third reflective structure and a fourth reflective structure, the first reflective structure and the second reflective structure The third reflective structure and the fourth reflective structure are spaced apart from each other to form the first gap, the first gap is a cross shape, and the light guide plates comprise a first light guide plate, a second light guide plate and a third a light guide plate and a fourth light guide plate, the first light guide plate is located above the first reflective structure and has two first inner sides and at least one first light incident surface, the second light guide plate is located above the second reflective structure And having two second inner sides and at least one second light The third light guide plate is located above the third reflective structure and has two third inner sides and at least one third light incident surface. The fourth light guide plate is located above the fourth reflective structure and has two fourth inner surfaces. The first light guide plate, the second light guide plate, the third light guide plate and the fourth light guide plate are spaced apart from each other, and the first inner side surface and the second inner side surface are spaced apart from each other The third inner side surface and the fourth inner side surface form a second gap, the second gap is a cross shape, and the first gap is located at a position corresponding to the second gap, and the auxiliary reflection structures include a first auxiliary reflective structure, a second auxiliary reflective structure, a third auxiliary reflective structure and a fourth auxiliary reflective structure, the first auxiliary reflective structure is located on the first inner side surface, and the second auxiliary reflective structure is located at the first auxiliary reflective structure a second inner side surface, the third auxiliary reflective structure is located on the third inner side surface, the fourth auxiliary reflective structure is located on the fourth inner side surface, and the light sources comprise a plurality of first light sources, a plurality of second light sources, Multiple third light sources a plurality of fourth light sources, the first light source faces for at least one first light incident surface of the first light guide plate, and the second light source faces for at least one second light incident surface of the second light guide plate, The third light source surface is opposite to at least one third light incident surface of the third light guide plate, and the fourth light source surface is opposite to at least one fourth light incident surface of the fourth light guide plate. A backlight module includes: a back plate; at least one reflective structure on the back plate; a light guide plate disposed above the reflective structures, the light guide plate having a light emitting surface, the light emitting surface having at least one groove The at least one groove will The light guide plate is divided into a plurality of blocks, each of the blocks having at least one light-incident surface; and a plurality of light sources facing the light-incident surface of the blocks. The backlight module of claim 9, wherein the at least one reflective structure is a plurality of reflective structures, the reflective structures are spaced apart from each other to form at least one gap, and the backlight module further comprises at least one auxiliary light source on the backplane And located in the gap, wherein the position of the groove is corresponding to the position of the gap, and the blocks are respectively disposed above the reflective structure. The backlight module of claim 10, wherein the output power of the auxiliary light source is less than the output power of the light sources. The backlight module of claim 9, wherein the at least one reflective structure is a whole reflective structure, and the backlight module further comprises at least one auxiliary light source located on the reflective structure, wherein the position of the auxiliary light source corresponds to The position of the groove, and the inner sides are opposite each other. The backlight module of claim 12, wherein the output power of the auxiliary light source is less than the output power of the light sources. The backlight module of claim 9, wherein the reflective structures are reflective sheets. The backlight module of claim 9, wherein the depth of the groove is greater than one half of the thickness of the light guide plate. The backlight module of claim 10, wherein the reflective structures comprise a first reflective structure and a second reflective structure, the first reflective structure and the second reflective structure being spaced apart from each other to form the gap, the blocks comprising First a block and a second block, the first block having at least one first light incident surface, the second block having at least one second light incident surface, the first block and the second block For the groove, the gap and the groove are all in a straight line shape, and the light sources include a plurality of first light sources and a plurality of second light sources, the first light sources facing at least one of the first blocks And entering the light surface, the second light sources facing at least one second light incident surface of the second block. The backlight module of claim 10, wherein the reflective structure comprises a first reflective structure, a second reflective structure, a third reflective structure and a fourth reflective structure, the first reflective structure and the second reflective structure The third reflective structure and the third reflective structure are spaced apart from each other to form the gap, and the gap is a cross shape, and the blocks include a first block, a second block, a third block, and a a fourth block, the first block is located above the first reflective structure and has at least one first light incident surface, the second block is located above the second reflective structure and has at least one second light incident surface, The third block is located above the third reflective structure and has at least one third light incident surface, the fourth block is located above the fourth reflective structure and has at least one fourth light incident surface, the first block, the first block The second block, the third block and the fourth block are the grooves, the grooves are in the shape of a cross, the position of the gap is corresponding to the position of the groove, and the light sources include a plurality of a light source, a plurality of second light sources, a plurality of third light sources, and a plurality a fourth light source, the first light source surface is opposite to at least one first light incident surface of the first block, and the second light source surface is opposite to at least one second light incident surface of the second block, and the third light source surface The light source surface is for at least one third light incident surface of the third block, and the fourth light source surface is at least a fourth input to the fourth block Glossy. A display device, comprising: a backlight module according to claim 1; a display panel disposed opposite to the backlight module; and a signal processor for converting a video signal to a control signal And a plurality of controllers electrically connected to the signal processor and the backlight module and the display panel for receiving the control signal and driving the backlight module and the display panel according to the control signal. A display device, comprising: a backlight module according to claim 9; a display panel disposed opposite to the backlight module; and a signal processor for converting a video signal into a control signal And a plurality of controllers electrically connected to the signal processor and the backlight module and the display panel for receiving the control signal and driving the backlight module and the display panel according to the control signal.