TW201901256A - Display device - Google Patents

Abstract

A display device including a display panel, a backlight module, and a rear light-transmitting layer is provided. The backlight module is disposed facing the bottom surface of the display panel and has a light guide plate and a light source. The light guide plate has a first surface, a second surface, and a light entrance surface. The light source is disposed along the light entrance. The rear light-transmitting layer is disposed on the second surface and close to a side edge of the second surface. The rear light-transmitting layer has a first zone and a second zone; a portion of light traveling through the guide light plate reaches the rear light-transmitting layer and refracted through the first and second zones into different outputting angles, respectively.

Description

   Display device   

The present invention relates to a display device; specifically, the present invention relates to a display device with ambient light compensation.

Flat and curved display devices have been widely used in various electronic devices, such as mobile phones, personal wearable devices, televisions, host computers for transportation, personal computers, digital cameras, handheld video games, and the like. However, in order to improve the user's visual experience, the industry is still continuously improving the optical performance of the display device.

However, what users often overlook is that when using a display device, it is necessary to pay attention to the combination of its brightness and external ambient light at the same time to reduce the damage to the eyes caused by long-term use. Taking the screen of a personal computer as an example, if the screen is bright and the surrounding environment is too dark, the user's pupil will be enlarged and the screen will feel too bright, which will cause eye discomfort. In order to solve this problem, some users will use table lamps or other lamps to supplement the light. However, if the supplementary light is not uniform, the user's eyes will still feel uncomfortable.

An object of the present invention is to provide a display device capable of providing appropriate ambient light compensation without adding a light source.

Another object of the present invention is to provide a display device, which can improve the user's comfort when viewing the display device, so as to reduce the fatigue caused by the eyes due to the environment being too dark or uneven.

The display device includes a display panel, a backlight module, and a back light redirecting layer. The display panel has an opposite display surface and a bottom surface; the bottom surface is used for receiving backlight from the backlight module to enter the display panel to form an image on the display surface. The backlight module is disposed on the bottom surface side of the display panel and has a light guide plate and a light source. The light guide plate has a first surface opposite to the bottom surface and a second surface parallel to the first surface. The light guide plate also has a light incident surface, which is located on the side of the light guide plate and is connected to the ends of the first surface and the second surface, respectively. The light source is arranged along the light incident surface, and the light generated by the light source enters the light guide plate from the light incident surface.

The rear light redirecting layer is disposed on the second surface near the edge. The rear light redirecting layer includes a first region and a second region; the first region has one or more first ridges, and the second region has one or more second ridges. Part of the light entering the light guide plate will be transmitted from the second side and exit, and enter the light redirecting layer. Some of these rays are refracted by the first chirp, and some are refracted by the second chirp. The rays refracted by the first chirp and the second chirp form different exit angles.

In addition, the first frame has a first inner bottom angle and a first outer bottom angle with respect to the second surface, and the second frame has a second inner bottom angle and a second outer bottom angle with respect to the second surface; The angle of the first inner bottom angle is not equal to the angle of the second inner bottom angle, and the angle of the first outer bottom angle is not equal to the angle of the second outer bottom angle.

10‧‧‧Reference wall

30‧‧‧ support surface

100‧‧‧ display panel

110‧‧‧ underside

130‧‧‧display surface

131‧‧‧display area

132‧‧‧ Display area vertical projection range

133‧‧‧Peripheral area

134‧‧‧ Peripheral area vertical projection range

300‧‧‧ backlight module

310‧‧‧light guide

311‧‧‧ the first side

312‧‧‧Second Side

313‧‧‧ Light surface

330‧‧‧light source

340, 350‧‧‧Reflector

370‧‧‧Optical diaphragm

500‧‧‧ rear light redirecting layer

501‧‧‧ diffuser

503‧‧‧ Enhancer

505‧‧‧ 稜鏡

510‧‧‧ District 1

511‧‧‧First

520‧‧‧Second District

521‧‧‧Secondary

530‧‧‧Third District

531‧‧‧ Third

550‧‧‧ the first edge line

610‧‧‧First irradiation area

620‧‧‧Second irradiation area

630‧‧‧third irradiation area

700‧‧‧shell

710‧‧‧ after opening

730‧‧‧ front opening

900‧‧‧ front light redirecting layer

911‧‧‧front

930‧‧‧Front irradiation area

950‧‧‧ second edge line

FIG. 1A is an exploded view of an element of an embodiment of a display device of the present invention; FIG. 1B is a partially enlarged view of the embodiment shown in FIG. 1A; FIG. 2 is a sectional view of an embodiment of a back light redirecting layer; Sectional view of the second and third embodiments; FIG. 4 is a sectional view of another embodiment of the back light redirecting layer; FIG. 5 is a sectional view of the first embodiment, the second embodiment, and the third embodiment of FIG. 4; 6 is a sectional view of an embodiment of a display device; FIG. 7 is a sectional view of another embodiment of a display device; FIG. 8 is an exploded view of components of another embodiment of a display device; FIG. 9 is a sectional view of a display device shown in FIG. 8; A cross-sectional view of another embodiment of a display device.

The present invention provides a display device, such as a computer monitor, a television, a monitor, a vehicle host, and the like. However, in different embodiments, the display device can also be applied to other electronic devices for display.

As shown in FIG. 1A, the display device includes a display panel 100, a backlight module 300, a back light redirecting layer 500, and a case 700. The display panel 100 is preferably a liquid crystal display panel. However, in different embodiments, other types of display panels that can be used with the backlight module 300 can also be used. The display panel 100 has a display surface 130 and a bottom surface 110; the bottom surface 110 and the display surface 130 are opposite sides; the bottom surface 110 is used for receiving backlight from the backlight module 300 into the display panel 100 to form an image on the display surface 130. The display panel 100, the backlight module 300, and the back light redirecting layer 500 are assembled in the casing 700 after being assembled, and the display surface 130 displays an image outward from the opening of the casing 700. However, in other embodiments, the casing 700 may only cover or support the backlight module 300 to form a frameless display device. In addition, the casing 700 may be replaced by a bottom plate, other structural components, or other structural connection methods.

The backlight module 300 is disposed on the bottom surface 110 side of the display panel 100 and has a light guide plate 310 and a light source 330. The light guide plate 310 has a first surface 311 and a second surface 312; the first surface 311 is opposite to the bottom surface 110, and the second surface 312 is parallel to the first surface 311, that is, the light guide plate 310 is opposite to the first surface 311. In addition, the light guide plate 310 further has a light incident surface 313; the light incident surface 313 is located on a side of the light guide plate 310 and is connected to the ends of the first surface 311 and the second surface 312 respectively. The light source 330 is disposed along the light incident surface 313. In a preferred embodiment, the light source 330 is, for example, a light emitting diode light bar, and is disposed parallel to the light incident surface 313. The light generated by the light source 330 enters the light guide plate 310 from the light incident surface 313 and is transmitted at least partially from the first surface 311 and enters the bottom surface 110 after passing through the light guide plate 310. In this preferred embodiment, the backlight module 300 may include an optical film 370 disposed between the first surface 311 and the bottom surface 110 to adjust light. The optical film 370 includes, but is not limited to, a diffusion sheet, a brightness enhancement sheet, a transflective sheet, and the like. In addition, the backlight module 300 may also be provided with a reflective sheet 340 on one side of the second surface 312 to increase the efficiency of light recycling and reuse.

As shown in FIG. 1A, the rear light redirecting layer 500 is directly or indirectly disposed on the second surface 312 near the edge. Preferably, the rear light redirecting layer 500 is formed in an elongated shape, and is disposed along one edge of the second surface 312 perpendicular to one side of the light incident surface 313. In addition, as shown in FIG. 1A, the rear light redirecting layers 500 are preferably provided in pairs on the two opposite sides of the second surface 312, but are not limited thereto, and may be provided on only one side or separately. It is located on the upper side and the lower side of the second surface 312, or on the upper side and both sides. The rear light redirecting layer 500 is preferably disposed on the second surface 312 where the reflective sheet 340 is not provided, that is, does not overlap the reflective sheet 340. In this embodiment, the rear light redirecting layer 500 is disposed outside two opposite sides of the reflective sheet 340.

Specifically, the back light redirecting layer 500 may preferably be formed by stacking several optical elements, such as a diffusion sheet 501 and a brightness enhancement sheet 503, and attached to the second surface 312; however, in different embodiments, the back light The redirecting layer 500 may also be formed of a single optical film. As shown in FIG. 1A, the housing 700 has a rear opening 710 corresponding to the rear light redirecting layer 500. In this embodiment, the rear opening 710 has a long shape similar to the shape of the back light directing layer 500 and parallel to the extending direction, but is not limited thereto, and the position is designed to allow the light emitted from the back light redirecting layer 500 to Out of the casing 700. In addition, in this preferred embodiment, the backlight module 300 preferably includes another reflective sheet 350 disposed on the first surface 311 and corresponding to the back light redirecting layer 500. Part of the light in the light guide plate 310 can be reflected by the reflection sheet 350 and exit from the second surface 312 to the rear light redirecting layer 500. Preferably, the coverage area of the reflection sheet 350 on the first surface 311 falls outside the vertical projection range 132 of the display area 131 on the display surface 130 on the first surface 311 to reduce Affects the image display effect in the display area 131. In other words, the setting position of the reflection sheet 350 falls within the vertical projection range 134 of the display surface 130 surrounding the peripheral area 133 of the display area 131 on the first surface 311. In different embodiments, the reflective sheet 350 may also be replaced by a microstructure formed at a corresponding position on the first surface 311 (or shared by both), so as to generate a total reflection of destructive light at the microstructure provided on the first surface 311. Effect, and the light output efficiency at the opposite light redirecting layer 500 is improved.

As shown in FIG. 1A, FIG. 1B and FIG. 2, the rear light redirecting layer 500 includes a cymbal 505 having a first region 510 and a second region 520. The first region 510 includes one or more first ridges 511 preferably arranged in parallel, and the first ridges 511 are preferably along the extension direction of the rear light redirecting layer 500 or the side of the second surface 312. extend. The second region 520 includes one or more second ridges 521 preferably arranged in parallel, and the second ridge 521 preferably has the same extending direction as the first ridge 511. In this preferred embodiment, the rear light redirecting layer 500 has a first ridgeline direction 550, and the first ridgeline direction 550 preferably extends along the side of the first surface 311. The first ridgeline direction 550 may be the average of the average extension directions of the ridgelines on each of the first ridge 511 and the second ridge 521, or the average extension direction of the ridgelines on the single first ridge 511 or the second ridge 521. Since the ridgelines on the first ridge 511 and the second ridge 521 are not necessarily straight and may have multiple ridgelines, it is better to take several points on the ridgeline and average the first in the direction of the ridgeline travel of each point. The average extension direction of the ridge line on the ridge 511 or the second ridge 521.

As shown in FIG. 2, a part of the light entering the light guide plate 310 is transmitted from the second surface 312 and exits, and enters the rear light redirecting layer 500. Some of these rays are refracted by the first 稜鏡 511 and some are refracted by the second 稜鏡 521. Only the rays refracted by the first 稜鏡 511 and the second 稜鏡 521 have different exit angles. Specifically, when the light leaving the second surface 312 changes its traveling direction through the chirp in the first region 510 and the second region 520, the first irradiation region 610 and the second irradiation region 620 will be formed respectively. In this embodiment, the second region 520 is closer to the edge of the second surface 312 than the first region 510, that is, the first region 510 is closer to the center of the second surface 312; however, as shown in FIG. The light rays refracted by the first region 510 and the second region 520 are staggered to form a first irradiation region 610 and a second irradiation region 620, respectively. In other words, the first irradiation area 610 is offset from the center of the second surface 312 compared with the second irradiation area 620.

As shown in FIG. 2, if the rear reference wall 10 is about 15 cm to 30 cm away from the rear light redirecting layer 500, the area on which the first illuminated area 610 and the second illuminated area 620 fall will be the first The center of an irradiation area 610 is far from the center of the second surface 312. In addition, the range on which the first irradiated area 610 and the second irradiated area 620 fall is preferably overlapped with a wide band at the edge of the border, so as to maintain the consistency of the irradiated range and reduce the uneven brightness. In this preferred embodiment, the proportion of the first area 510 to the total area of the rear light redirecting layer 500 ranges from 48% to 68%, so that the The highest brightness in the light is consistent. Since the first region 510 is closer to the center of the second surface 312, the received light intensity is also higher. Providing the light to the farthest first irradiation region 610 will help the uniformity of the overall ambient light compensation. Sex. With this design, the light emitted from the back light redirecting layer 500 can provide compensation for ambient light on the back side of the display device, thereby achieving the effect of protecting eyesight. In addition, since the light used is from the light source 330 in the original backlight module 300, and no other light source is additionally provided, the power configuration and mechanism design are relatively simple.

It should be particularly noted that the distribution of each cymbal on the cymbal 505 is not limited to this embodiment, and it is also possible to use cymbals with almost the same cross-section, or to use different cymbal configurations, such as the first area The positions of 510 and the second area 520 are reversed or staggered.

As shown in FIG. 3, in the two bottom corners of the same frame in this embodiment, what is closer to the center of the second face 312 is called the inner bottom corner, and the closer to the side of the second face 312 is It is called the outsole corner. The first ridge 511 has a first inner bottom angle θ ₁ and a first outer bottom angle □ ₁ with respect to the second surface 312. The second toe 521 is closer to the edge of the second surface 312 than the first toe 511 and has a second inner bottom angle θ ₂ and a second outer bottom angle □ ₂ relative to the second surface 312. The first inner bottom angle θ ₁ and the first outer bottom angle □ _{1 are} preferably different from the second inner bottom angle θ ₂ and the second outer bottom angle □ _{2 respectively} , so as to achieve the effect of making the light refraction angles different. In a preferred embodiment, the first inner bottom angle θ ₁ is smaller than the first outer bottom angle □ ₁ , and the second inner bottom angle θ ₂ is larger than the second outer bottom angle □ ₂ . More preferably, the first inner bottom angle θ _{1 is} between 48 degrees and 56 degrees, the first outer bottom angle □ ₁ is between 58 degrees and 62 degrees, and the second inner bottom angle θ _{2 is} between 80 degrees. Between 90 ° and 90 °, the second outsole angle □ _{2 is} between 55 ° and 65 °, so that the distribution range of the first irradiated area 610 and the second irradiated area 620 meets the requirements, for example, it can be compensated to the back of the display The background area with an outward opening angle of about 40 to 45 degrees.

FIG. 4 shows another embodiment of the back light redirecting layer 500. In this embodiment, in addition to the first region 510 and the second region 520, the rear light redirecting layer 500 further includes a third region 530 disposed in parallel with the first region 510 and the second region 520. The third region 530 is closer to the edge of the second surface 312 than the second region 520 and sandwiches the second region 520 in the middle with the first region 510. The third region 530 has one or more third ridges 531, which are preferably arranged in parallel. The light refracted by the third 531 and the light refracted by the first 511 and the second 521 Generate different exit angles. Specifically, when the light leaving the second surface 312 changes its traveling direction through the third region 531 of the third region 530, a third irradiation region 630 will be formed. As shown in FIG. 4, light rays refracted through the third region 530 and the second region 520 are staggered to form a third irradiation region 630 and a second irradiation region 620, respectively. In other words, the third irradiation area 630 is closer to the center of the second surface 312 than the second irradiation area 620. In addition, the range on which the third irradiated area 630 and the second irradiated area 620 fall is preferably overlapped with a wide band at the edge of the boundary to maintain the consistency of the irradiated range and reduce the unevenness of light and dark. In this preferred embodiment, the ratio of the second area 520 to the total area of the rear light redirecting layer 500 is between 13% and 22%; the ratio of the third area 530 to the total area of the rear light redirecting layer 500 is between 19% to 30%. With this design, the light emitted from the back light redirecting layer 500 can provide a more uniform and extensive compensation of ambient light on the back side of the display device, thereby improving the effect of protecting eyesight.

As shown in FIG. 5, the third ridge 531 has a third inner bottom angle θ ₃ and a third outer bottom angle □ ₃ with respect to the second surface 312. Preferably, the third inner bottom angle boundary θ _{3 is} between 80 degrees and 90 degrees, and the third outer bottom angle □ _{3 is} between 45 degrees and 55 degrees, so that the third irradiation area 630 and the second irradiation The distribution range of the area 620 meets the requirements.

As shown in FIG. 6, the rear light redirecting layer 500 is preferably disposed in the housing 700, and at least a part of the outgoing light can be emitted through the rear opening 710. In this preferred embodiment, the light rays refracted through the first region 510 and the second region 520 are staggered, so light rays refracted by the second region 520 that are closer to the vertical will more easily avoid the right edge of the opening 710 and Unblocked, increasing light utilization. However, the distribution of radon on the cymbal 505 is not limited to this embodiment, and is hereby explained.

In another embodiment, as shown in FIG. 7, the rear light redirecting layer 500 may be partially or fully embedded in the rear opening 710, so that light emitted from the rear light redirecting layer 500 is more difficult to be blocked by the housing 700. . The above “embedding” includes, but is not limited to, the edge of the light redirecting layer 500 in the future is in conflict or tight fit with the edge of the rear opening 710, and also includes a gap between the edge of the light redirecting layer 500 and the edge of the rear opening 710 situation.

8 and 9 illustrate another embodiment of a display device. In this embodiment, in addition to the aforementioned display panel 100, backlight module 300, rear light redirecting layer 500, and housing 700, the display device further includes a front light redirecting layer 900 disposed directly or indirectly on the first surface 311. Near the edge. Preferably, the front light redirecting layer 900 is disposed near the bottom edge of the first surface 311 closest to the support surface 30 (for example, a table top) to provide the ambient light that is irradiated on the support surface 30 as compensation. . The front light redirecting layer 900 may preferably be disposed on the optical film 370, that is, indirectly on the first surface 311, so it can accept a relatively collimated and uniform incoming light; however, in different embodiments, the front light redirecting layer 900 The orientation layer 900 may also be directly disposed on the first surface 311. As shown in FIG. 9, the light entering the light guide plate 310 from the light incident surface 313 at least partially exits from the first surface 311 and enters the front light redirecting layer 900, and is refracted by the front light redirecting layer 900 to deviate from the center of the display panel 100. .

As shown in FIGS. 8 and 9, the front light redirecting layer 900 includes one or more front ridges 911 which are preferably arranged in parallel. In this preferred embodiment, the front light redirecting layer 900 has a second edge line direction 950, and the second edge line direction 950 preferably extends along the bottom edge of the first surface 311. The second ridgeline direction 950 may preferably be the average of the average extension directions of the ridgelines on each front ridge 911, or the average extension direction of the ridgelines on a single front ridge 911. Because the ridgeline on the front 911 is not necessarily a straight line, and may have multiple ridgelines, it is better to take several points on the ridgeline, and obtain the average extension of the ridgeline on the front 911 by the direction of the ridgeline of each point. direction. As shown in FIG. 8, the second ridgeline trend 950 is preferably intersected with the first ridgeline trend 550; in a more preferred embodiment, the second ridgeline trend 950 is substantially perpendicular to the first ridgeline trend 550. Part of the light entering the light guide plate 310 is transmitted from the first surface 311 and enters the front light redirecting layer 900. These light rays are refracted by the front panel 911 and deviate in a direction away from the center normal of the display panel 100. Specifically, as shown in FIG. 9, when the light leaving the first surface 311 changes the traveling direction through the front ridge 911, a front irradiation area 930 is formed, and ambient light compensated by the support surface 30 is provided. In addition, the design of the front light redirecting layer 900 can also adopt a partition design like the rear light redirecting layer 500 in the foregoing embodiment, and ridges with different bottom angles are respectively set in different areas to further optimize the ambient light compensation. Effect, but not limited to this. In contrast, in this embodiment, the light redirecting layer 500 is not limited to adopting the aforementioned partition design, but a plurality of frames having the same bottom angle may be used to achieve the effect of providing compensation light on the back side of the display device.

As shown in FIG. 9, the front light redirecting layer 900 is preferably disposed in the housing 700, and at least a part of the outgoing light can be emitted from the front opening 730. However, in another embodiment, as shown in FIG. 10, the front light redirecting layer 900 may be partially or fully embedded in the front opening 730, so that light emitted from the front light redirecting layer 900 is more difficult to be blocked by the housing 700. . The above “embedding” includes, but is not limited to, the edge of the front light redirecting layer 900 is in conflict or tight fit with the edge of the front opening 730. situation.

With this design, the light emitted from the front light redirecting layer 900 can provide compensation for ambient light on the support surface of the display device, thereby achieving the effect of protecting eyesight. In addition, since the light used is from the light source 330 in the original backlight module 300, and no other light source is added, the power configuration and mechanism design are relatively simple. Since the light emitted from the front light redirecting layer 900 can provide the ambient light compensation on the front support surface of the display device, and the rear light redirecting layer 500 can provide the ambient light compensation from the back side of the display device, the user will get more ambient light compensation. Complete and comprehensive.

The present invention has been described by the above related embodiments, but the above embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, modifications and equal settings included in the spirit and scope of the scope of patent application are all included in the scope of the present invention.

Claims (32)

    A display device includes: a display panel having a bottom surface; a backlight module having: a light guide plate having a first surface opposite to the bottom surface, a second surface parallel to the first surface, and respectively A light incident surface connected to one of the first surface end and the second surface end; and a light source disposed along the light incident surface to generate a light entering the light guide plate from the light incident surface and at least partially from the first light incident surface; One side exits into the bottom surface; and a rear light redirecting layer is disposed near the edge of the second surface; wherein the rear light redirecting layer includes a first area and a second area, the first area Having at least a first chirp, and the second region having at least a second chirp; the light incident from the second face to the rear light redirecting layer is produced by refracting the first chirp and the second chirp Different exit angles.         The display device according to claim 1, wherein the first frame has a first inner bottom angle and a first outer bottom angle relative to the second mask, and the second frame has a first inner bottom angle with respect to the second mask. A second inner bottom angle and a second outer bottom angle; and the first inner bottom angle is not equal to the second inner bottom angle, and the first outer bottom angle is not equal to the second outer bottom angle.         The display device according to claim 2, wherein the second region is closer to the edge of the second surface than the first region, the first inner bottom angle is smaller than the first outer bottom angle, and the second inner bottom angle is larger than The second outer bottom corner.         The display device according to claim 3, wherein the first inner bottom corner boundary is between 48 degrees and 56 degrees, and the first outer bottom corner boundary is between 58 degrees and 62 degrees.         The display device according to claim 4, wherein the second inner bottom angle is between 80 degrees and 90 degrees, and the second outer bottom angle is between 55 degrees and 65 degrees.         The display device according to claim 5, wherein the rear light redirecting layer includes a third region closer to the edge of the second surface than the second region, the third region having at least a third frame, the third region稜鏡 A third inner bottom angle and a third outer bottom angle relative to the second mask. The third inner bottom angle is between 80 degrees and 90 degrees, and the third outer bottom angle is between 45 degrees and 55. Degrees between.         The display device according to claim 1, wherein the second region is closer to the edge of the second surface than the first region, and a portion of the light incident from the second surface to the rear light redirecting layer passes through the first edge. A first irradiated area is formed after mirror refraction, and a second irradiated area is formed after the second part is refracted by the second chirp. The first irradiated area is offset from the center of the second surface than the second irradiated area.         The display device according to claim 7, wherein the ratio of the first area to the total area of the rear light redirecting layer is between 48% and 68%.         The display device according to claim 8, wherein the rear light redirecting layer includes a third area closer to the edge of the second surface than the second area, and the second area accounts for the proportion of the total area of the rear light redirecting layer. The area is between 13% and 22%, and the ratio of the third area to the total area of the light redirecting layer is between 19% and 30%.         The display device according to claim 1, wherein the backlight module includes a reflective sheet disposed on the first surface and corresponding to the rear light redirecting layer.         The display device according to claim 10, wherein a coverage range of the reflective sheet on the first surface falls outside a vertical projection range of a display area of the display panel on the first surface.         The display device according to claim 1, further comprising a casing, the casing having a rear opening opposite to the rear light redirecting layer.         The display device according to claim 12, wherein the rear light redirecting layer is at least partially embedded in the rear opening.         The display device according to claim 1, further comprising a front light redirecting layer, which is disposed near the edge of the first surface and does not overlap the display panel; wherein, the light guide plate enters the light guide plate from the light incident surface. Light at least partially exits from the first surface and enters the front light redirecting layer, and is refracted by the front light redirecting layer to deviate from the center of the display panel.         The display device according to claim 14, wherein the front light redirecting layer has a first edge line direction, the rear light redirecting layer has a second edge line direction, and the first edge line direction is intersected with the second edge line direction. .         The display device according to claim 14, further comprising a housing, the housing having: a rear opening opposite to the rear light redirecting layer; and a front opening opposite to the front light redirecting layer.         The display device according to claim 16, wherein the front light redirecting layer is at least partially embedded in the front opening.         A display device includes: a display panel having a bottom surface; a backlight module having: a light guide plate having a first surface opposite to the bottom surface, a second surface parallel to the first surface, and respectively A light incident surface connected to one of the first surface end and the second surface end; and a light source disposed along the light incident surface to generate a light entering the light guide plate from the light incident surface and at least partially from the first light incident surface; One side emerges into the bottom surface; a rear light redirecting layer is disposed near the edge of the second surface; wherein light entering the light guide plate from the light incident surface at least partially exits the second surface and enters the rear surface. A light redirecting layer and refracted by the rear light redirecting layer to deviate from the center of the display panel; and a front light redirecting layer disposed on the first surface near the edge and not overlapping the display panel; wherein The light entering the light guide plate from the light incident surface at least partially exits from the first surface and enters the front light redirecting layer, and is refracted by the front light redirecting layer to deviate from the center of the display panel.         The display device according to claim 18, wherein the rear light redirecting layer includes a first area and a second area, the first area is provided with at least one first frame, and the second area is provided with at least one Second chirp; the light incident from the second face to the rear light redirecting layer is refracted by the first chirp and the second chirp to produce different exit angles.         The display device according to claim 19, wherein the first frame has a first inner bottom angle and a first outer bottom angle with respect to the second mask, and the second frame has a first bottom corner with respect to the second mask. A second inner bottom angle and a second outer bottom angle; the first inner bottom angle and the first outer bottom angle are different from the second inner bottom angle and the second outer bottom angle, respectively.         The display device according to claim 20, wherein the second region is closer to the edge of the second surface than the first region, the first inner bottom angle is smaller than the first outer bottom angle, and the second inner bottom angle is larger than The second outer bottom corner.         The display device according to claim 21, wherein the first inner bottom angle is between 48 degrees and 56 degrees, and the first outer bottom angle is between 58 degrees and 62 degrees.         The display device according to claim 22, wherein the second inner bottom angle is between 80 degrees and 90 degrees, and the second outer bottom angle is between 55 degrees and 65 degrees.         The display device according to claim 22, wherein the rear light redirecting layer includes a third area closer to the edge of the second surface than the second area, and the third area is provided with at least a third frame. Misaki has a third inner bottom angle and a third outer bottom angle with respect to the second mask, the third inner bottom angle is between 80 degrees and 90 degrees, and the third outer bottom angle is between 45 degrees and Between 55 degrees.         The display device according to claim 18, wherein the second region is closer to the edge of the second surface than the first region, and a portion of the light incident from the second surface to the rear light redirecting layer passes through the first edge. A first irradiation area is formed after mirror refraction, and a second irradiation area is formed after being refracted by the second chirp, and the first irradiation area is offset from the center of the second surface than the second irradiation area.         The display device according to claim 25, wherein a ratio of the first area to a total area of the rear light redirecting layer is between 48% and 68%.         The display device according to claim 26, wherein the rear light redirecting layer includes a third area closer to the edge of the second surface than the second area, and the second area accounts for the proportion of the total area of the rear light redirecting layer. Between 13% and 22%, the ratio of the third area to the total area of the light redirecting layer is between 19% and 30%.         The display device according to claim 18, wherein the backlight module includes a reflective sheet disposed on the first surface and corresponding to the rear light redirecting layer.         The display device according to claim 28, wherein a coverage range of the reflection sheet on the first surface falls outside a vertical projection range of a display area of the display panel on the first surface.         The display device according to claim 18, wherein an extension direction of the front light redirecting layer is perpendicular to an extension direction of the rear light redirecting layer.         The display device according to claim 18, further comprising a casing, the casing having: a rear opening opposite to the rear light redirecting layer; and a front opening opposite to the front light redirecting layer.         The display device according to claim 31, wherein the front light redirecting layer or the rear light redirecting layer is at least partially embedded in the front opening or the rear opening.