CN213210668U - Display device and backlight module - Google Patents
Display device and backlight module Download PDFInfo
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- CN213210668U CN213210668U CN202022585460.9U CN202022585460U CN213210668U CN 213210668 U CN213210668 U CN 213210668U CN 202022585460 U CN202022585460 U CN 202022585460U CN 213210668 U CN213210668 U CN 213210668U
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Abstract
The application discloses display device and backlight unit belongs to and shows technical field. The display device includes: backlight module, liquid crystal display panel and cover brilliant film. The backlight module may include: the light source, the light guide plate, the reflecting strip, the light absorption strip and the optical film are located in the frame body. Because there is no bonding relation between the light absorbing strip and the diffusion sheet in the optical film, and there is a bonding relation between the reflection strip and the diffusion sheet in the optical film, after the flip chip film is bent and bonded with one side of the frame body in the backlight module, which is far away from the liquid crystal display panel, under the action of the rebounding force of the bent part in the flip chip film, the diffusion sheet can not displace along with the displacement of the light absorbing strip, but can displace along with the displacement of the light guide plate with the light absorbing strip. The light guide plate and the diffusion sheet can not be separated, and the light emitting effect of the backlight module is improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device and a backlight module.
Background
The liquid crystal display device generally includes: the backlight module comprises a liquid crystal display panel, a backlight module arranged on a backlight surface (namely, the surface far away from the backlight surface) of the liquid crystal display panel, and a driving chip for driving the liquid crystal display panel to work.
In order to reduce the size of the frame in the lcd device, the driving Chip in the lcd device is usually packaged by a Chip On Flex (COF) packaging technology. When the chip on film technology is adopted to package the driving chip, one end of the chip on film is electrically connected with the liquid crystal display panel, and the rest part needs to be bent to one side of the backlight module, which is far away from the liquid crystal display panel, and is bonded with one side of the backlight module, which is far away from the liquid crystal display panel.
However, the bent portion of the flip chip has a certain bounce, which will generate an acting force on the side of the backlight module away from the liquid crystal display panel, and the acting force will damage the film structure in the backlight module, resulting in a poor light emitting effect of the backlight module.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a display device and a backlight module. The problem of the light-emitting effect of backlight unit among the present display device is relatively poor can be solved, technical scheme is as follows:
in one aspect, there is provided a display device including:
the liquid crystal display device comprises a liquid crystal display panel, a backlight module and a chip on film;
the chip on film is electrically connected with the liquid crystal display panel and is connected with one side of the backlight module, which is far away from the liquid crystal display panel;
the backlight module includes: the light source, the light guide plate, the reflecting strip, the light absorption strip and the optical film are located in the frame;
the light emitting surface of the light source faces the side face of the light guide plate, and the optical film is positioned on the light guide plate;
the reflection strip is positioned on one side, close to the light source, in the frame body, positioned between the optical film and the light guide plate and connected with the optical film;
the light absorption strip is positioned on one side, close to the light source, in the frame body, and is positioned on one side, far away from the reflection strip, of the optical film, and is separated from the optical film.
Optionally, one surface of the reflection strip close to the light guide plate is separated from the light guide plate.
Optionally, a groove is formed in one side of the frame body, which is close to the light source, and one surface of the reflection strip, which is far away from the light guide plate, is connected with the side wall of the groove.
Optionally, the reflection strip is a white adhesive tape with a single-sided adhesive tape, the single-sided adhesive tape is located on a side of the white adhesive tape away from the light guide plate, and the single-sided adhesive tape is bonded to the optical film.
Optionally, the optical film includes: a diffusion sheet on the light guide plate, the reflection strip being between the diffusion sheet and the light guide plate, the optical film further comprising: and the two light intensifying sheets are positioned on one side of the diffusion sheet, which is far away from the light guide plate.
Optionally, one side of the diffusion sheet close to the light source is provided with a strip-shaped light absorption structure.
Optionally, the width of the light absorbing structure is greater than the width of a contact area between the diffusion sheet and the reflection strip.
Optionally, the backlight module further includes: and the shading glue is positioned between the frame body and the liquid crystal display panel, one surface of the shading glue is bonded with the liquid crystal display panel, and the other surface of the shading glue is bonded with the light absorbing strips.
Optionally, the light source includes: the flexible light source comprises a flexible circuit board and a plurality of lamp bodies located on the flexible circuit board, wherein a light emergent surface of each lamp body is connected with the side surface of the light guide plate, and the flexible circuit board is connected with one side, far away from the optical diaphragm, of the light guide plate.
In another aspect, a backlight module is provided, including:
the light source, the light guide plate, the reflecting strip, the light absorption strip and the optical film are located in the frame;
the light emitting surface of the light source faces the side face of the light guide plate, and the optical film is positioned on the light guide plate;
the reflection strip is positioned on one side, close to the light source, in the frame body, positioned between the optical film and the light guide plate and connected with the optical film;
the light absorption strip is positioned on one side, close to the light source, in the frame body, and is positioned on one side, far away from the reflection strip, of the optical film, and is separated from the optical film.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
the display device includes: backlight module, liquid crystal display panel and cover brilliant film. The backlight module may include: the light source, the light guide plate, the reflecting strip, the light absorption strip and the optical film are located in the frame body. Because there is no bonding relation between the light absorbing strip and the diffusion sheet in the optical film, and there is a bonding relation between the reflection strip and the diffusion sheet in the optical film, after the flip chip film is bent and bonded with one side of the frame body in the backlight module, which is far away from the liquid crystal display panel, under the action of the rebounding force of the bent part in the flip chip film, the diffusion sheet can not displace along with the displacement of the light absorbing strip, but can displace along with the displacement of the light guide plate with the light absorbing strip. Therefore, the light guide plate and the diffusion sheet can not be separated, the contact relation between the light guide plate and the diffusion sheet is guaranteed to exist all the time, the probability that light rays emitted by a light source in the backlight module are leaked from the light guide plate and the diffusion sheet is effectively reduced, and the light emitting effect of the backlight module is further improved. In addition, the display device does not need to redesign the internal structure, and only the reflecting strip is newly introduced into the backlight module, so that the manufacturing cost of the display device can be effectively reduced. Because the reflection strip is close to the light source relative to the light absorption strip, part of light emitted by the light source is not directly absorbed by the light absorption strip but is reflected for multiple times by the reflection strip, so that the light emitted by the light source is scattered and emitted from one side of the light guide plate close to the liquid crystal display panel, the probability of directly being absorbed by the light absorption strip in the light emitted by the light source is effectively reduced, the light emitting efficiency of the light source is improved, the light emitting effect of the backlight module is further improved, and the better display effect of the display device is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a film structure of a display device;
FIG. 2 is a force analysis diagram of the display device shown in FIG. 1;
fig. 3 is a schematic diagram of a film structure of a display device according to an embodiment of the present disclosure;
FIG. 4 is a force analysis diagram of the display device shown in FIG. 3;
fig. 5 is a light path diagram in a light guide plate within the display device shown in fig. 3;
fig. 6 is a schematic diagram of a film structure of another display device provided in an embodiment of the present application;
fig. 7 is a schematic view of a film structure of a backlight module according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a film structure of a display device. The display device may include:
a liquid crystal display panel 01, a backlight module 02 and a chip on film 03.
The backlight module 02 is usually disposed on a side of the lcd panel 01 away from the light-emitting surface.
One end of the flip chip film 03 can be electrically connected with the liquid crystal display panel 01, and after the flip chip film 03 is electrically connected with the liquid crystal display panel 01, the rest part of the flip chip film 03 can be bent to one side of the backlight module 02 far away from the liquid crystal display panel 01 and is bonded with one side of the backlight module 02 far away from the liquid crystal display panel 01.
The backlight module 02 in the display device may include: a frame 021, a side-in light source 022, a light guide plate 023, a black adhesive tape 024, a plurality of optical films 025 laminated in the frame 021, and a shading adhesive tape 026 between the frame 021 and the LCD panel 01.
The light emitting surface of the light source 022 faces the side surface of the light guide plate 023. A plurality of stacked optical films 025 are disposed on the light guide plate 023, and one of the plurality of stacked optical films 025 that is in contact with the light guide plate 023 is typically a diffusion sheet 025 a. The black adhesive tape 024 is positioned on one side of the frame 021 close to the light source 022, the black adhesive tape 024 is positioned on one surface of the diffusion sheet 025a far away from the light guide plate 021, one surface of the black adhesive tape 024, which is in contact with the diffusion sheet 025a, is provided with a single-sided adhesive tape, and the black adhesive tape 024 can be adhered to the diffusion sheet 025a through the single-sided adhesive tape. The light-shielding adhesive tape 026 is generally a double-sided tape, one side of the light-shielding adhesive tape 026 can be bonded to the liquid crystal display panel 01, the other side of the light-shielding adhesive tape 026 can be bonded to the end surface of the frame 021 close to the liquid crystal display panel 01, and the side of the black adhesive tape 024 away from the diffusion sheet 025 a.
After the flip chip 03 is bonded to the frame 021 of the backlight module 02 away from the lcd panel 01 after the flip chip in the display device is bent, the light source 022 of the backlight module 02 is located at a side of the frame 021 close to the flip chip 03. In this case, referring to fig. 2, fig. 2 is a force analysis diagram of the display device shown in fig. 1. The bent portion of the COF 03 has a certain bounce, and under the bounce, the portion of the frame 021 in the backlight module 02 bonded to the COF 03 is pulled by the COF 03. Under the action of the pulling force F, the part of the frame 021 bonded to the flip-chip film 03 is displaced along the direction of the pulling force F, so that the parts of the light source 022 and the light guide plate 023 in the frame 021 close to the light source 022 follow the displacement of the frame 021 and are also displaced along the direction of the pulling force F. Since the black stripes 024 are bonded to the diffusion sheet 025a and the diffusion sheet 025a is only in contact with the light guide plate 013 but not in bonding relation, the portions of the black stripes 024 and the diffusion sheet 025a bonded to the black stripes 024 are displaced in the direction opposite to the direction of the tensile force F.
Thus, a portion of the light guide plate 023 near the light source 022 is separated from a portion of the diffusion sheet 025a bonded with the black adhesive tape 024, and there is no contact therebetween, so that a trumpet-shaped opening is formed between the light guide plate 023 and the diffusion sheet 025 a. The light emitted from the light source 022 may be emitted from the area between the light guide plate 023 and the diffusion sheet 025a, that is, the light emitted from the light source 022 of the backlight module 02 may leak light, which results in poor light emitting effect of the backlight module 02 and affects the display effect of the display device.
In order to improve the light-emitting effect of the backlight module 02, the commonly used improvement measures are as follows:
(1) design light guide plate 023 in backlight module 02 again, be close to the regional net point that sets up density comparatively dense of the lamp body in light source 022 at light guide plate 023, and the region between two lamp bodies in light source 022 that is close to light guide plate 023 sets up density comparatively sparse net point.
(2) When the chip on film 03 is bent, a special jig is used for pressure maintaining treatment, so that the bent chip on film 03 is fully bonded with the backlight module 01, and the bounce existing at the bent part of the chip on film 03 is reduced.
(3) The design of the flip chip film 03 is redesigned to reduce the thickness of the flip chip film 03, thereby reducing the bounce existing at the bending part of the flip chip film 03.
However, none of the above three improvements can effectively suppress the light leakage phenomenon of the light emitted from the light source 022 in the backlight module 02, and the three improvements involve the redesign of the structure, which results in the high manufacturing cost of the display device.
Referring to fig. 3, fig. 3 is a schematic view illustrating a film structure of a display device according to an embodiment of the present disclosure. The display device may include:
a backlight module 100, a liquid crystal display panel 200 and a chip on film 300. The backlight module 100 is generally disposed on a side of the liquid crystal display panel 200 away from the light emitting surface a.
The flip chip 300 is electrically connected to the liquid crystal display panel 200. Illustratively, the non-display area of the lcd panel 200 has a bonding structure, and one end of the flip-chip film 300 has a connection structure. One end of the flip-chip film 300 can be electrically connected to the bonding structure of the liquid crystal display panel 200 through the connection structure, so that the electrical connection between the flip-chip film 300 and the liquid crystal display panel 200 can be realized. In a possible implementation manner, the bonding structure in the liquid crystal display panel 200 and the connection structure in the chip on Film 300 may be bonded by an Anisotropic Conductive Film (ACF), and the Anisotropic Conductive Film not only can electrically connect the liquid crystal display panel 200 and the chip on Film 300, but also can ensure that the liquid crystal display panel 200 and the chip on Film 300 can be fastened and connected. In the present application, the display device may further include: a driving chip (not shown in fig. 3) for controlling the lcd panel 100 to display images, and the driving chip may be packaged by using a chip on film 300 in the display device. Since the flip-chip film 300 can be electrically connected to the liquid crystal display panel 100, the driving chip in the display device can be electrically connected to the liquid crystal display panel 100 through the flip-chip film 300, so as to control the content displayed on the screen of the liquid crystal display panel 200.
The flip-chip film 300 can also be connected to a side of the backlight module 100 away from the lcd panel 200. For example, after the flip chip 300 is electrically connected to the liquid crystal display panel 200, the flip chip 300 may be bent, so that the bent flip chip 300 and the side of the backlight module 100 away from the liquid crystal display panel 200 may be bonded by a double-sided tape. In the present application, after the chip on film 300 is bonded to the side of the backlight module 100 away from the liquid crystal display panel 200, the driving chip encapsulated by the chip on film 300 is located at the side of the backlight module 100 away from the liquid crystal display panel 200. Therefore, the frame in the display device does not need to shield the driving chip, and the width of the frame of the display device can be reduced, so that the screen occupation ratio of the display device can be improved.
In the embodiment of the present application, the backlight module 100 in the display device may include: the backlight module comprises a frame body 101, and a side-entry light source 102, a light guide plate 103, a reflection strip 104, a light absorption strip 105 and an optical film which are positioned in the frame body 101.
The light emitting surface of the light source 102 may face the side surface of the light guide plate 103. In the present application, the light emitted from the light source 102 can be homogenized by the light guide plate 103 and then emitted from a side of the light guide plate 103 close to the liquid crystal display panel 200.
The optical film is positioned on the light guide plate 103.
The reflective strip 104 may be located at a side of the frame 101 close to the light source 102, and the reflective strip 104 may be located between the optical film and the light guide plate 103. The reflective strip 104 and the optical film may be connected.
The light absorbing strip 105 can be located on a side of the frame 101 close to the light source 102, and the light absorbing strip 105 can be located on a side of the optical film far from the reflective strip 104. The light absorbing strips 105 are disposed apart from the diffusion sheet 106. That is, there is no adhesive relationship between the light absorbing strip 105 and the optical film.
By way of example, the optical film may include: a diffusion sheet 106 is positioned on the light guide plate 103, and in one possible implementation, the diffusion sheet 106 may be in contact with the light guide plate 103. The reflective strip 104 may be located between the diffusion sheet 106 and the light guide plate 103 in the optical film, and the reflective strip 104 and the diffusion sheet 106 may be connected by bonding. The light absorbing strips 105 may be located on a side of the diffuser 106 of the optical film that is away from the reflective strips 104, with the light absorbing strips 105 being located separate from the diffuser 106.
In the embodiment of the present application, after the flip-chip 300 in the display device is bent, the flip-chip 300 can be bonded to a side of the frame 101 of the backlight module 100 away from the liquid crystal display panel 100, and the light source 102 of the backlight module 100 is located at a side of the frame 101 close to the flip-chip 300.
In this case, referring to fig. 4, fig. 4 is a force analysis diagram of the display device shown in fig. 3. After the flip-chip film 300 in the display device is bent, the bent portion of the flip-chip film 300 has a certain bounce force, and under the effect of the bounce force, the portion of the frame 101 in the backlight module 100 bonded to the flip-chip film 300 is pulled by the flip-chip film 300. Under the action of the pulling force F, the portion of the frame 101 bonded to the flip-chip package 300 is displaced along the direction of the pulling force F, and at this time, the portions of the light source 102 and the light guide plate 103 in the frame 101 close to the light source 102 are displaced along the direction of the pulling force F along with the displacement of the frame 101; the light-absorbing strips 105 are usually adhered to the light-shielding strips (not labeled in fig. 3) between the liquid crystal display panel 200 and the frame 101, so that the light-absorbing strips 105 are displaced in the direction opposite to the pulling force.
In the present application, since there is no bonding relationship between the light absorption bars 105 and the diffusion sheet 106, and there is a bonding relationship between the reflection bars 104 and the diffusion sheet 106, the diffusion sheet 106 does not displace in the direction opposite to the pulling force F following the displacement of the light absorption bars 105, and the diffusion sheet 106 and the light absorption bars 105 displace in the direction of the pulling force F together with the portion of the light guide plate 103 on the side closer to the light source 102 under the action of gravity. Therefore, the light guide plate 103 and the diffusion sheet 106 can be ensured not to be separated from each other, and then the contact relation between the light guide plate 103 and the diffusion sheet 106 is ensured to exist all the time, so that the probability of light rays emitted by the light source 102 in the backlight module 100 leaking from the light guide plate and the diffusion sheet is effectively reduced, the light emitting effect of the backlight module 100 is further improved, and the display effect of the display device is ensured to be better.
As shown in fig. 1, since the black adhesive tape 024 is located at a side of the frame 021 close to the light source 022, a part of light emitted from the light source 022 may be absorbed by the black adhesive tape 024, resulting in a low light-emitting efficiency of the light source 022 in the backlight module 02.
In the embodiment of the present application, as shown in fig. 5, fig. 5 is a light path diagram in the light guide plate in the display device shown in fig. 3. Since the reflective strip 104 in the backlight module 100 is close to the light source 102 relative to the light absorbing strip 105, the light emitted from the light source 102 is not directly absorbed by the light absorbing strip 105, but is reflected by the reflective strip 104 for multiple times, so that the light emitted from the light source 102 is scattered and then emitted from one side of the light guide plate 103 close to the liquid crystal display panel 200. The probability that the light emitted from the light source 102 is directly absorbed by the light absorption strip 105 is effectively reduced, the light emitting efficiency of the light source 102 is improved, and the light emitting effect of the backlight module 100 is further improved.
In summary, the display device provided in the embodiment of the present application includes: backlight module, liquid crystal display panel and cover brilliant film. The backlight module may include: the light source, the light guide plate, the reflecting strip, the light absorption strip and the optical film are located in the frame body. Because there is no bonding relation between the light absorbing strip and the diffusion sheet in the optical film, and there is a bonding relation between the reflection strip and the diffusion sheet in the optical film, after the flip chip film is bent and bonded with one side of the frame body in the backlight module, which is far away from the liquid crystal display panel, under the action of the rebounding force of the bent part in the flip chip film, the diffusion sheet can not displace along with the displacement of the light absorbing strip, but can displace along with the displacement of the light guide plate with the light absorbing strip. Therefore, the light guide plate and the diffusion sheet can not be separated, the contact relation between the light guide plate and the diffusion sheet is guaranteed to exist all the time, the probability that light rays emitted by a light source in the backlight module are leaked from the light guide plate and the diffusion sheet is effectively reduced, and the light emitting effect of the backlight module is further improved. In addition, the display device does not need to redesign the internal structure, and only the reflecting strip is newly introduced into the backlight module, so that the manufacturing cost of the display device can be effectively reduced. Because the reflection strip is close to the light source relative to the light absorption strip, part of light emitted by the light source is not directly absorbed by the light absorption strip but is reflected for multiple times by the reflection strip, so that the light emitted by the light source is scattered and emitted from one side of the light guide plate close to the liquid crystal display panel, the probability of directly being absorbed by the light absorption strip in the light emitted by the light source is effectively reduced, the light emitting efficiency of the light source is improved, the light emitting effect of the backlight module is further improved, and the better display effect of the display device is ensured.
Optionally, please refer to fig. 6, where fig. 6 is a schematic diagram of a film structure of another display device provided in the embodiment of the present application. The frame 101 of the backlight module 100 has a groove 101a on a side thereof adjacent to the light source 102. The surface of the reflective strip 104 of the backlight module 100 away from the light guide plate 103 may be connected to the sidewall of the groove 101 a. For example, the surface of the reflective strip 104 away from the light guide plate 103 and the sidewall of the groove 101a may be connected by adhesion.
In this case, the surface of the reflective strip 104 away from the light guide plate 103 may be bonded to not only the diffusion sheet 106, but also the sidewall of the groove 101a in the frame 101, so as to prevent the diffusion sheet 106 from moving in a direction parallel to the diffusion sheet 106, thereby effectively improving the stability of the diffusion sheet 106 in the backlight module 100 and further improving the light-emitting effect of the backlight module 100.
In the present application, the frame 101 in the backlight module 100 of the display device further has a back plate 101b, and the back plate 101b can effectively support the light guide plate 103 in the backlight module 100.
In the embodiment of the present application, a surface of the reflective strip 104 of the backlight module 100 close to the light guide plate 103 is separated from the light guide plate 103, that is, there is no bonding relationship between the reflective strip 104 and the light guide plate 103, that is, no bonding glue is disposed between the reflective strip 104 and the light guide plate 103. Since the adhesive is easy to form a light condensing effect, which may damage the light path of the light emitted from the light source 102 during transmission in the light guide plate 103, when no adhesive is disposed between the reflective strip 104 and the light guide plate 103, the light emitting effect of the backlight module 100 may be further improved.
For example, the reflective strip 104 may be a white adhesive tape with a single-sided adhesive tape 104a, the single-sided adhesive tape 104a is located on a side of the white adhesive tape away from the light guide plate 103, the white adhesive tape may be bonded to the diffusion sheet 106 through the single-sided adhesive tape 104a, and the white adhesive tape may be bonded to a sidewall of the groove 101a in the frame 101 through the single-sided adhesive tape 104 a. It should be noted that, in the embodiment of the present application, the reflection bar 104 is schematically illustrated as a white adhesive tape, in other alternative implementations, the reflection bar 104 may also be another type of reflection structure, for example, the reflection bar 104 is a strip-shaped specular reflection structure, or the reflection bar 104 is a strip-shaped metal reflection structure with an insulating layer, which is not limited in the embodiment of the present application.
In the embodiment of the present application, the optical film in the backlight module 100 may include: a diffusion sheet 106 disposed on the light guide plate 103, and the reflective strips 104 in the backlight module 100 may be disposed between the diffusion sheet 106 and the light guide plate 103. The optical film may further include: two layers of brightness enhancement films 107 are arranged on the side of the diffusion sheet far away from the light guide plate 103, and the two layers of brightness enhancement films 107 need to be stacked on the diffusion sheet 106.
Optionally, a side of the diffusion sheet 106 of the backlight module 100 close to the light source 102 has a strip-shaped light absorbing structure 106 a. The light absorbing structures 106a in the diffusion sheet 106 may contact the reflective strips 104 in the backlight module 100. Thus, when the reflective strip 104 in the backlight module 100 is a white adhesive tape, although the reflective strip 104 can reflect most of the light emitted from the light source 102, a small amount of light will be transmitted through the reflective strip 104, and the transmitted light can be absorbed by the light absorbing structure 106a in the diffusion sheet 106, thereby effectively avoiding the light leakage of the light source 102.
For example, the light absorbing structures 106a in the diffusion sheet 106 may be silk-screened black oil. As such, the silk-screened black oil may be printed on a side of the diffusion sheet 106 near the light source 102 using a screen printing process to form the light absorbing structures 106a in the diffusion sheet 106.
In the embodiment of the present application, the light absorbing structures 106a in the diffusion sheet 106 and the reflective strips 104 in the backlight module 100 are both strip-shaped, and the width direction of the strip-shaped light absorbing structures 106a is parallel to the width direction of the reflective strips 104. The width of the strip-shaped light absorbing structure 106a may be larger than the width of the contact area between the diffusion sheet 106 and the reflection strip 104.
In this case, the strip-shaped light absorbing structures 106a in the diffusion sheet 106 may contact not only the reflection strips 104 but also the strip-shaped light absorbing structures 106a in the diffusion sheet 106 may contact the light guide plate 103. In this way, the strip-shaped light absorbing structures 106a in the diffusion sheet 106 can absorb not only the light projected from the reflection strips 104 but also the light emitted from the light guide plate 103 in the region not in contact with the diffusion sheet 106 and not in contact with the reflection strips 104.
In this application, as shown in fig. 6, the backlight module 100 in the display device may further include: and a reflecting sheet 108 positioned on a side of the light guide plate 103 away from the diffusion sheet 106. The light transmitted from the light guide plate 103 can be reflected out of the light guide plate 103 by the reflection sheet 108 from the side of the light guide plate 103 close to the diffusion sheet 106.
In the embodiment of the present application, as shown in fig. 6, the light source 102 in the backlight module 100 may include: a flexible circuit board 1021, and a plurality of lamp bodies 1022 located on the flexible circuit board 1021. In the present application, each lamp body 1022 may be a Light Emitting Diode (LED). The light emitting surface of each lamp body 1022 in the light source 102 may be connected to the side surface of the light guide plate 103. The flexible circuit board 1021 in the light source 102 may be connected to a side of the light guide plate 103 remote from the diffusion sheet 106. Thus, the light emitting surface of each lamp body 1022 and the side surface of the light guide plate 103 may be connected by bonding, and the flexible circuit board 1021 and the side of the light guide plate 103 far from the diffusion sheet 106 may also be connected by bonding.
It should be noted that, at present, the flexible circuit board in the light source of the common backlight module is bonded to the front surface of the light guide plate (i.e., the light exit surface of the light guide plate), so that an area for bonding the flexible circuit board needs to be reserved on the front surface of the light guide plate, and this area needs to be shielded by the frame in the display device, which results in a larger width of the frame in the display device. In the embodiment of the present application, when the flexible circuit board 1021 is bonded to the side of the light guide plate 103 away from the diffusion sheet 106, an area for bonding the flexible circuit board 1021 does not need to be reserved on the front surface of the light guide plate 103, and thus the width of the frame of the display device can be further reduced, and the screen occupation ratio of the display device is further improved.
Optionally, as shown in fig. 6, the backlight module 100 in the display device may further include: and a light shielding adhesive 109 disposed between the frame 101 and the liquid crystal display panel 200. The light-shielding adhesive 109 may be a double-sided tape, so that one side of the light-shielding adhesive 109 may be adhered to the liquid crystal display panel 200, and the other side of the light-shielding adhesive 109 may be adhered to the light-absorbing bar 105. For example, the light absorbing strip 105 may be a black adhesive tape without an adhesive tape, such that after the black adhesive tape is adhered to the light shielding adhesive 109, light rays that do not pass through two prism sheets 107 in the backlight module 100 can be absorbed by the black adhesive tape, and thus, it can be ensured that the light rays that pass through the backlight module 100 can all pass through the light guide plate 103, the diffusion sheet 106 and the two prism sheets 107 in sequence.
In the present application, one surface of the light-shielding adhesive 109 may be bonded to an end surface of the housing 101 close to the liquid crystal display panel 200. Thus, the backlight module 100 and the liquid crystal display panel 200 can be connected by the light shielding glue 109.
In the embodiment of the present application, the liquid crystal display panel 200 in the display device generally includes: the liquid crystal display panel comprises an array substrate 201 and a color filter substrate 202 which are arranged oppositely, a liquid crystal layer (not shown in fig. 6) located between the array substrate 201 and the color filter substrate 202, a first polarizer 203 located on the light incident side of the liquid crystal display panel 200, and a second polarizer 204 located on the light emergent side of the liquid crystal display panel 200.
Since the area of the first polarizer 203 on the light incident side of the lcd panel 200 is small (usually, larger than the area of the display device), the first polarizer 203 is adhered to the light-shielding glue 109 in the backlight module 100. Therefore, in order to improve the firmness of the connection between the backlight module 100 and the liquid crystal display panel 200, the backlight module 100 may include: and the buffer foam 110 is positioned between the light shielding glue 109 and the liquid crystal display panel 200, and the light shielding glue 109 can be bonded with the liquid crystal display panel 200 through the buffer foam 110. Illustratively, one side of the buffer foam 110 close to the liquid crystal display panel 200 has a single-sided tape, and the buffer foam 110 can be bonded to the array substrate 201 in the liquid crystal display panel 200 through the single-sided tape. The bonding area between the light shielding glue 110 and the liquid crystal display panel 200 can be increased through the buffer foam 110, so that the bonding firmness between the liquid crystal display panel 200 and the backlight module 100 can be improved.
In summary, the display device provided in the embodiment of the present application includes: backlight module, liquid crystal display panel and cover brilliant film. The backlight module may include: the light source, the light guide plate, the reflecting strip, the light absorption strip and the optical film are located in the frame body. Because there is no bonding relation between the light absorbing strip and the diffusion sheet in the optical film, and there is a bonding relation between the reflection strip and the diffusion sheet in the optical film, after the flip chip film is bent and bonded with one side of the frame body in the backlight module, which is far away from the liquid crystal display panel, under the action of the rebounding force of the bent part in the flip chip film, the diffusion sheet can not displace along with the displacement of the light absorbing strip, but can displace along with the displacement of the light guide plate with the light absorbing strip. Therefore, the light guide plate and the diffusion sheet can not be separated, the contact relation between the light guide plate and the diffusion sheet is guaranteed to exist all the time, the probability that light rays emitted by a light source in the backlight module are leaked from the light guide plate and the diffusion sheet is effectively reduced, and the light emitting effect of the backlight module is further improved. In addition, the display device does not need to redesign the internal structure, and only the reflecting strip is newly introduced into the backlight module, so that the manufacturing cost of the display device can be effectively reduced. Because the reflection strip is close to the light source relative to the light absorption strip, part of light emitted by the light source is not directly absorbed by the light absorption strip but is reflected for multiple times by the reflection strip, so that the light emitted by the light source is scattered and emitted from one side of the light guide plate close to the liquid crystal display panel, the probability of directly being absorbed by the light absorption strip in the light emitted by the light source is effectively reduced, the light emitting efficiency of the light source is improved, the light emitting effect of the backlight module is further improved, and the better display effect of the display device is ensured.
The embodiment of the present application further provides a backlight module, which may be the backlight module 100 in the display device in the foregoing embodiment. Referring to fig. 7, fig. 7 is a schematic view illustrating a film structure of a backlight module according to an embodiment of the present disclosure. The backlight module 100 may include:
the backlight module comprises a frame body 101, and a side-entry light source 102, a light guide plate 103, a reflection strip 104, a light absorption strip 105 and an optical film which are positioned in the frame body 101.
The light emitting surface of the light source 102 may face the side surface of the light guide plate 103. The optical film is positioned on the light guide plate 103. By way of example, the optical film may include: a diffusion sheet 106 on the light guide plate 103, the diffusion sheet 106 being contactable with the light guide plate 103.
The reflective strip 104 may be located at a side of the frame 101 close to the light source 102, and the reflective strip 104 may be located between the diffusion sheet 106 and the light guide plate 103. The reflective strips 104 and diffuser 106 may be bonded.
The light absorbing strip 105 may be located on a side of the frame 101 close to the light source 102, and the light absorbing strip 105 may be located on a side of the diffusion sheet 106 far from the reflection strip 104. The light absorbing strips 105 are disposed apart from the diffusion sheet 106. That is, there is no bonding between the light absorbing strips 105 and the diffuser 106.
Alternatively, a surface of the reflective strip 103 adjacent to the light guide plate 103 may be disposed separately from the light guide plate 103.
Optionally, a groove 101a is formed in the frame 101 on a side close to the light source 102, and a side of the reflective strip 104 away from the light guide plate 103 may be bonded to a sidewall of the groove 101 a.
Optionally, the frame 101 further has a back plate 101b, and the back plate 101b can effectively support the light guide plate 103 in the backlight module 100.
Alternatively, the reflective strip 104 may be a white adhesive tape with a single-sided adhesive tape 104a, the single-sided adhesive tape 104a is located on a side of the white adhesive tape away from the light guide plate 103, and the white adhesive tape 104a is adhered to the diffusion sheet 106.
Optionally, the backlight module 100 may further include: two layers of brightness enhancement films 107 are arranged on one side of the diffusion sheet far away from the light guide plate 103.
Optionally, a side of the diffusion sheet close to the light source 102 has a strip-shaped light absorbing structure 106 a.
Optionally, the width of the light absorbing structure 106a is greater than the width of the diffuser in the area where it contacts the reflective strip 104.
Optionally, the light absorbing structure 106a may be silk-screen black oil.
Optionally, the backlight module 100 may further include: and a reflecting sheet 108 positioned on a side of the light guide plate 103 away from the diffusion sheet 106.
Optionally, the backlight module 100 may further include: and the light shielding glue 109 is positioned on one side of the frame body 101, which is far away from the light guide plate 103, one surface of the light shielding glue 109 is used for being adhered with the liquid crystal display panel, and the other surface of the light shielding glue 109 is adhered with the light absorbing strips 105.
Optionally, the backlight module 100 may further include: and the light shielding glue 109 is arranged on the buffer foam 110 on the side of the light shielding glue 109 far away from the frame body 101, and the light shielding glue 109 is used for being bonded with the liquid crystal display panel through the buffer foam 110.
Optionally, the light source 102 includes: the light guide plate 103 comprises a flexible circuit board 1021 and a plurality of lamp bodies 1022 located on the flexible circuit board 1021, wherein a light emitting surface of the lamp bodies 1022 can be bonded to a side surface of the light guide plate 103, and the flexible circuit board 1022 is bonded to a side of the light guide plate 103 away from the diffusion sheet 106.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the working principle and the connection relationship of each structure in the backlight module described above may refer to the corresponding content in the structural embodiment of the display device, and are not described herein again.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or there can be more than one intermediate layer or element. Like reference numerals refer to like elements throughout.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.
Claims (10)
1. A display device, comprising:
the liquid crystal display device comprises a liquid crystal display panel, a backlight module and a chip on film;
the chip on film is electrically connected with the liquid crystal display panel and is connected with one side of the backlight module, which is far away from the liquid crystal display panel;
the backlight module includes: the light source, the light guide plate, the reflecting strip, the light absorption strip and the optical film are located in the frame;
the light emitting surface of the light source faces the side face of the light guide plate, and the optical film is positioned on the light guide plate;
the reflection strip is positioned on one side, close to the light source, in the frame body, positioned between the optical film and the light guide plate and connected with the optical film;
the light absorption strip is positioned on one side, close to the light source, in the frame body, and is positioned on one side, far away from the reflection strip, of the optical film, and is separated from the optical film.
2. The display device according to claim 1,
the reflection strip is close to one side of the light guide plate and is arranged separately from the light guide plate.
3. The display device according to claim 1,
one side of the frame body close to the light source is provided with a groove, and one side of the reflection strip far away from the light guide plate is connected with the side wall of the groove.
4. The display device according to any one of claims 1 to 3,
the reflection strip is a white adhesive tape with a single-sided adhesive tape, the single-sided adhesive tape is positioned on one side of the white adhesive tape, which is far away from the light guide plate, and the single-sided adhesive tape is bonded with the optical film.
5. The display device according to claim 1,
the optical film includes: a diffusion sheet on the light guide plate, the reflection strip being between the diffusion sheet and the light guide plate, the optical film further comprising: and the two light intensifying sheets are positioned on one side of the diffusion sheet, which is far away from the light guide plate.
6. The display device according to claim 5,
one side of the diffusion sheet, which is close to the light source, is provided with a strip-shaped light absorption structure.
7. The display device according to claim 6,
the width of the light absorption structure is larger than the width of a contact area of the diffusion sheet and the reflection strip.
8. The display device according to any one of claims 5 to 7,
the backlight module further comprises: and the shading glue is positioned between the frame body and the liquid crystal display panel, one surface of the shading glue is bonded with the liquid crystal display panel, and the other surface of the shading glue is bonded with the light absorbing strips.
9. The display device according to any one of claims 5 to 7,
the light source includes: the flexible light source comprises a flexible circuit board and a plurality of lamp bodies located on the flexible circuit board, wherein a light emergent surface of each lamp body is connected with the side surface of the light guide plate, and the flexible circuit board is connected with one side, far away from the optical diaphragm, of the light guide plate.
10. A backlight module, comprising:
the light source, the light guide plate, the reflecting strip, the light absorption strip and the optical film are located in the frame;
the light emitting surface of the light source faces the side face of the light guide plate, and the optical film is positioned on the light guide plate;
the reflection strip is positioned on one side, close to the light source, in the frame body, positioned between the optical film and the light guide plate and connected with the optical film;
the light absorption strip is positioned on one side, close to the light source, in the frame body, and is positioned on one side, far away from the reflection strip, of the optical film, and is separated from the optical film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022585460.9U CN213210668U (en) | 2020-11-10 | 2020-11-10 | Display device and backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022585460.9U CN213210668U (en) | 2020-11-10 | 2020-11-10 | Display device and backlight module |
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| CN213210668U true CN213210668U (en) | 2021-05-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625488A (en) * | 2021-08-11 | 2021-11-09 | 东莞华贝电子科技有限公司 | Backlight module and display device |
| CN113835268A (en) * | 2021-09-30 | 2021-12-24 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN114973949A (en) * | 2022-05-24 | 2022-08-30 | 昆山国显光电有限公司 | Display module, preparation method thereof and electronic equipment |
-
2020
- 2020-11-10 CN CN202022585460.9U patent/CN213210668U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625488A (en) * | 2021-08-11 | 2021-11-09 | 东莞华贝电子科技有限公司 | Backlight module and display device |
| CN113835268A (en) * | 2021-09-30 | 2021-12-24 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN113835268B (en) * | 2021-09-30 | 2023-11-21 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN114973949A (en) * | 2022-05-24 | 2022-08-30 | 昆山国显光电有限公司 | Display module, preparation method thereof and electronic equipment |
| CN114973949B (en) * | 2022-05-24 | 2023-11-24 | 昆山国显光电有限公司 | Display module, manufacturing method thereof and electronic equipment |
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