CN116931322A - Backlight module, terminal equipment and assembling method thereof - Google Patents
Backlight module, terminal equipment and assembling method thereof Download PDFInfo
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- CN116931322A CN116931322A CN202210351894.3A CN202210351894A CN116931322A CN 116931322 A CN116931322 A CN 116931322A CN 202210351894 A CN202210351894 A CN 202210351894A CN 116931322 A CN116931322 A CN 116931322A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- Nonlinear Science (AREA)
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application provides a backlight module, terminal equipment and an assembling method thereof, and belongs to the technical field of display. The backlight module comprises: a light source and a light guide plate; the light-emitting surface of the light source faces the side surface of the light guide plate; the light guide plate is provided with a central area and an edge area positioned at the periphery of the central area, wherein the density of first net points distributed at a first position in the edge area is smaller than that of second net points distributed at a position adjacent to the first position in the central area, and the first position is any position in the edge area; wherein the thickness of the edge display portion is smaller than the thickness of the center display portion. In the light guide plate, the brightness of the edge display part of the liquid crystal display panel is lower than that of the central display part by setting the density of the first lattice points of the edge area to be smaller than that of the second lattice points of the central area, so that the brightness difference caused by the fact that the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part can be made up, and the display effect of the liquid crystal display panel is improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module, terminal equipment and an assembly method thereof.
Background
At present, terminal devices have become indispensable electronic products in people's life. Various terminal devices such as mobile phones, tablet computers, notebook computers and the like greatly increase the convenience of life of people.
In general, the terminal device may include: a liquid crystal display screen and a middle frame. The middle frame can be connected with the back of the liquid crystal display. At present, the liquid crystal display and the middle frame are generally bonded through dispensing, and in order to ensure the bonding effectiveness between the liquid crystal display and the middle frame, bonding treatment is required to be performed on the bonded liquid crystal display and middle frame.
However, after the laminated lcd and the middle frame are laminated, the brightness at the edge of the lcd may be higher than that at the center, resulting in poor display effect of the lcd.
Disclosure of Invention
The embodiment of the application provides a backlight module, terminal equipment and an assembly method thereof, which improve the display effect of a liquid crystal display. The technical scheme is as follows:
in one aspect, a backlight module is provided, including: a light source and a light guide plate;
the light emergent surface of the light source faces the side surface of the light guide plate;
the light guide plate is provided with a central area and an edge area positioned at the periphery of the central area, a plurality of first mesh points are arranged in the edge area, a plurality of second mesh points are arranged in the central area, the density of the first mesh points distributed at a first position in the edge area is smaller than that of the second mesh points distributed at a position adjacent to the first position in the central area, and the first position is any position in the edge area;
the light rays emitted by the light source and reflected by the first lattice points are used for being emitted to an edge display part of the liquid crystal display panel, the light rays emitted by the light source and reflected by the second lattice points are used for being emitted to a central display part of the liquid crystal display panel, and the thickness of the edge display part is smaller than that of the central display part.
Optionally, the density of the first dots distributed at each position in the edge region gradually increases in a direction approaching the central region.
Optionally, the density of the second dots distributed at the second position in the central area is positively correlated with the horizontal distance between the light emitting surface of the light source and the second position, and the second position is any position in the central area.
Optionally, the width of the edge region ranges from 4 mm to 6 mm.
Optionally, the plurality of first dots and the plurality of second dots are distributed on the same plate surface of the light guide plate.
Optionally, the backlight module further includes: a frame, a reflecting sheet, and an optical film;
the light source, the light guide plate, the reflecting sheet and the optical film are all positioned in the frame body, the optical film is positioned on one surface of the light guide plate opposite to the plate surface provided with the first lattice points, and the reflecting sheet is positioned on one side of the light guide plate, which is away from the optical film.
In another aspect, there is provided a terminal device, including: a middle frame and a liquid crystal display screen;
the liquid crystal display includes: a liquid crystal display panel and the backlight module;
the middle frame is connected with one side of the backlight module, which is away from the liquid crystal display panel;
wherein the thickness of the edge display portion of the liquid crystal display panel is smaller than the thickness of the center display portion.
Alternatively, the thickness at each position in the edge display portion is gradually increased in a direction approaching the central display portion, and a difference between the thickness at a position farthest from the central display portion in the edge display portion and the thickness of the central display portion is equal to a maximum deformation amount of the liquid crystal display panel.
Optionally, an outer boundary of the orthographic projection of the edge region of the light guide plate on the liquid crystal display panel coincides with an outer boundary of the edge display portion.
In another aspect, a method for preparing a terminal device is provided, the method comprising:
assembling the backlight module with a liquid crystal display panel to obtain a liquid crystal display;
and attaching the middle frame to one side of the backlight module, which is away from the liquid crystal display panel, and performing lamination treatment on the liquid crystal display screen and the middle frame, so that the middle frame is connected with one side of the backlight module, which is away from the liquid crystal display panel, and the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part.
Optionally, the pressing process is performed on the liquid crystal display screen and the middle frame, including:
placing the bonded middle frame and the bonded liquid crystal display screen in a pressing device, and continuously applying pressing force for a first time period to the middle frame and the liquid crystal display screen through the pressing device;
taking out the bonded middle frame and the bonded liquid crystal display screen from the accommodating groove, and standing for a second period of time;
wherein, the compression fittings includes: the first pressing plate is provided with a containing groove and an elastic structure positioned in the containing groove, and the second pressing plate is provided with a buffer structure;
the holding tank is used for holding after the laminating the center with liquid crystal display, after the laminating the center with liquid crystal display is located behind the holding tank, elastic structure with the center contact, and make buffer structure with liquid crystal display panel contact.
Optionally, the first time period is greater than or equal to 3 hours and the second time period is greater than or equal to 7 hours.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the backlight module comprises a light source and a light guide plate. The light rays emitted by the light source and reflected by the plurality of first net points are used for being emitted to the edge display part of the liquid crystal display panel. The light emitted by the light source is reflected by the plurality of second net points and is used for being emitted to the central display part of the liquid crystal display panel. In this case, since the density of the first dots distributed at the first position in the edge region is smaller than the density of the second dots distributed at the position adjacent to the first position in the central region of the light guide plate within the light guide plate. Therefore, the light flux emitted from the edge region of the light guide plate is smaller than the light flux emitted from the center region. Thus, after the light with smaller luminous flux emitted from the edge area of the light guide plate is emitted to the edge display part with smaller thickness of the liquid crystal display panel, the light with larger luminous flux emitted from the central area of the light guide plate is emitted to the central display part with larger thickness of the liquid crystal display panel, and the brightness of the edge display part of the liquid crystal display panel can be ensured to be approximately equal to the brightness of the central display part. Therefore, the brightness difference caused by the fact that the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part can be made up by adjusting the density of the first net points in the edge area, so that the uniformity of the display brightness of the liquid crystal display screen is higher, and the display effect of the liquid crystal display screen is effectively improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is an exploded view of a backlight module according to an embodiment of the present application;
FIG. 2 is a top view of the backlight module shown in FIG. 1;
fig. 3 is a partial enlarged view of the backlight module shown in fig. 2 at B;
fig. 4 is a light path diagram of the backlight module shown in fig. 1;
fig. 5 is a schematic structural diagram of a backlight module according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 7 is a flowchart of a method for preparing a terminal device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a pressing device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Currently, the terminal device may include: a liquid crystal display screen and a middle frame. When the terminal equipment is assembled, the edge part of the liquid crystal display screen is generally attached to the middle frame through dispensing; and then, carrying out lamination treatment on the laminated liquid crystal display screen and the middle frame so that the liquid crystal display screen and the middle frame can be connected in an adhesive mode.
The liquid crystal display generally comprises a backlight module and a liquid crystal display panel. When the laminated liquid crystal display and the middle frame are subjected to press-fit treatment, a pressing force needs to be applied to the edge part of the liquid crystal display and the middle frame. In this way, the edge display portion of the liquid crystal display panel in the liquid crystal display panel is deformed by the pressing force, so that the thickness of the edge display portion in the liquid crystal display panel is smaller than that of the central display portion, and the thickness of the liquid crystal display panel is inversely related to the brightness of the liquid crystal display panel when displaying the picture, that is, the smaller the thickness of the liquid crystal display panel is, the higher the brightness of the liquid crystal display panel when displaying the picture is. As such, the brightness of the edge display portion of the liquid crystal display may be higher than that of the central display portion, resulting in poor display effect of the liquid crystal display.
Referring to fig. 1 and fig. 2, fig. 1 is an exploded view of a backlight module according to an embodiment of the application, and fig. 2 is a top view of the backlight module shown in fig. 1. The backlight module 000 may include: a light source 100 and a light guide plate 200.
The light emitting surface of the light source 100 in the backlight module 000 may face the side of the light guide plate 200. That is, the backlight module 000 is a side-in type backlight module. Here, the light source 100 may be a light bar.
For a clearer view of the structure of the light guide plate 200 in the backlight module 000, please refer to fig. 3, fig. 3 is a partial enlarged view of the backlight module at B shown in fig. 2. The light guide plate 200 in the backlight module 000 has a central region 200a and an edge region 200b located at the periphery of the central region 200 a. By way of example, the edge region 200b may be an annular region distributed around the central region 200 a. In the light guide plate 200, a plurality of first dots 201 are disposed in the edge area 200b, and a plurality of second dots 202 are disposed in the central area 200 a.
The density of the first dots 201 distributed at the first position in the edge region 200b of the light guide plate 200 is less than the density of the second dots 202 distributed at the position adjacent to the first position in the central region 200a of the light guide plate 200. The first position refers to any position in the edge area 200b.
Note that, the density of the first dots 201 distributed at the first position in the edge area 200b means: the number of first dots 201 distributed in a unit area at any one position within the edge area 200b. Accordingly, the density of the second dots 202 distributed at a position adjacent to the first position in the central region 200a means: the number of second dots 202 distributed in a unit area at the nearest position to the first position within the central area 200 a.
For example, it is assumed that, in the light guide plate 200, the position B1 is a certain position in the edge region 200B, and the position B2 is a position adjacent to the position B1 in the central region 200 a. Then, the density of the first dots 201 arranged at the position B1 of the light guide plate 200 is smaller than the density of the second dots 202 arranged at the position B2.
In the embodiment of the application, as shown in fig. 4, fig. 4 is a light path diagram of the backlight module shown in fig. 1. After the light emitted from the light source 100 is incident from the side of the light guide plate 200, the incident light may be reflected between the two plate surfaces (A1, A2) of the light guide plate 200 multiple times. In the present application, a plurality of first dots 201 and a plurality of second dots 202 may be provided on one plate surface A1 of the light guide plate 200. Thus, the first dots 201 and the second dots 202 can reflect part of the light emitted toward the plate surface A1 out of the light guide plate 200, so that the light emitted from the light source 100 can be emitted from the plate surface A2 of the light guide plate 200.
It should be noted that, after the backlight module 000 provided by the embodiment of the present application is assembled with the liquid crystal display panel to obtain the liquid crystal display, the liquid crystal display may be attached to the middle frame, and the connection between the liquid crystal display and the middle frame may be achieved by performing a lamination process. However, after the bonding process is performed on the bonded liquid crystal display and center, the thickness of the edge display portion of the liquid crystal display panel is smaller than that of the center display portion. Wherein the edge display portion of the liquid crystal display panel is a ring-shaped display portion surrounding the central display portion.
In the embodiment of the present application, the light reflected by the plurality of first dots 201 is used for being directed to the edge display portion of the liquid crystal display panel among the light emitted from the light source 100. The light reflected by the plurality of second dots 202 is emitted from the light source 100 and is directed to a central display portion of the lcd panel. In this case, since the density of the first dots 201 distributed at the first position in the edge region 200b is smaller than the density of the second dots 202 distributed at the position adjacent to the first position in the central region 200a of the light guide plate 200 within the light guide plate 200. Therefore, the light flux of the light guide plate 200 emitted from the edge region 200b is smaller than the light flux emitted from the center region 200 a. In this way, after the light having a smaller luminous flux emitted from the edge region 200b of the light guide plate 200 is directed to the edge display portion having a smaller thickness of the liquid crystal display panel, the light having a larger luminous flux emitted from the center region 200a of the light guide plate 200 is directed to the center display portion having a larger thickness of the liquid crystal display panel, it is possible to ensure that the brightness of the edge display portion of the liquid crystal display panel 000 is approximately equal to the brightness of the center display portion. Therefore, the brightness difference caused by the fact that the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part can be made up by adjusting the density of the first net points in the edge area, so that the uniformity of the display brightness of the liquid crystal display screen is higher, and the display effect of the liquid crystal display screen is effectively improved.
In summary, the backlight module provided in the embodiment of the application includes: a light source and a light guide plate. The light rays emitted by the light source and reflected by the plurality of first net points are used for being emitted to the edge display part of the liquid crystal display panel. The light emitted by the light source is reflected by the plurality of second net points and is used for being emitted to the central display part of the liquid crystal display panel. In this case, since the density of the first dots distributed at the first position in the edge region is smaller than the density of the second dots distributed at the position adjacent to the first position in the central region of the light guide plate within the light guide plate. Therefore, the light flux emitted from the edge region of the light guide plate is smaller than the light flux emitted from the center region. Thus, after the light with smaller luminous flux emitted from the edge area of the light guide plate is emitted to the edge display part with smaller thickness of the liquid crystal display panel, the light with larger luminous flux emitted from the central area of the light guide plate is emitted to the central display part with larger thickness of the liquid crystal display panel, and the brightness of the edge display part of the liquid crystal display panel can be ensured to be approximately equal to the brightness of the central display part. Therefore, the brightness difference caused by the fact that the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part can be made up by adjusting the density of the first net points in the edge area, so that the uniformity of the display brightness of the liquid crystal display screen is higher, and the display effect of the liquid crystal display screen is effectively improved.
In the embodiment of the present application, the width of the edge region 200b in the light guide plate 200 may be equal to the width of the edge display portion of the liquid crystal display panel. Since in the liquid crystal display panel, the width of the edge display portion, which is different from the thickness of the center display portion, ranges from 4 mm to 6 mm. Accordingly, the width of the edge region 200b in the light guide plate 200 may also range from 4 to 6 millimeters. For example, the width of the edge region 200b in the light guide plate 200 may be 5.5 millimeters. In this way, it is ensured that the light with smaller luminous flux emitted from the edge region 200b of the light guide plate 200 is only directed to the edge display portion of the liquid crystal display panel, and the light with larger luminous flux emitted from the central region 200a of the light guide plate 200 is only directed to the central display portion of the liquid crystal display panel, thereby further improving the uniformity of the display brightness of the liquid crystal display panel.
In the present application, the density of the first dots 201 distributed at each position in the edge region 200b of the light guide plate 200 gradually increases in a direction approaching the central region 200 a. In this case, since the thickness of the edge display portion of the liquid crystal display panel gradually increases in a direction approaching the center display portion. Accordingly, when the densities of the first dots 201 distributed at the respective positions in the edge region 200b of the light guide plate 200 are gradually increased in the direction approaching the central region 200a, the luminous flux of the light rays exiting the edge region 200b of the light guide plate 200 is gradually increased in the direction approaching the central region 200a, so that the uniformity of the brightness of the edge display portion of the light guide plate 200 after passing through the edge display portion of the liquid crystal display panel is high. In this way, the light guide plate 200 can gradually compensate for the brightness difference caused by the deformation of the liquid crystal display panel in the direction approaching the central area 200a in the edge area 200b, and further make the final brightness of the edge display portion of the liquid crystal display panel similar to the final brightness of the central display portion.
Alternatively, the deformation amount of the liquid crystal display panel gradually decreases in a direction approaching the central display portion. And the deformation amount of the liquid crystal display panel reaches the maximum at the farthest position from the central display portion. That is, the thickness of the liquid crystal display panel at each position in the edge display portion gradually increases in a direction approaching the central display portion, and the difference between the thickness at the position farthest from the central display portion in the edge display portion and the thickness of the central display portion is equal to the maximum deformation amount of the liquid crystal display panel.
In this case, since the deformation amount of the liquid crystal display panel reaches the maximum in the edge display portion, the deformation amount of the edge display portion at each position can be similar, and further, the thickness of the liquid crystal display panel at each position in the edge display portion can be ensured to be similar, and the display brightness is the same, so that the brightness of the liquid crystal display panel at each position in the edge display portion can be compensated by the light guide plate 200 in the backlight module 000 conveniently, and the final brightness of the liquid crystal display 20 at each position is further similar. For example, the density of the first dots 201 disposed at each position of the edge region 200b of the light guide plate 200 may be reduced by 20% to 30% with respect to the density of the dots disposed at the position of the light guide plate in the related art, i.e., it may be ensured that the brightness of the edge display portion of the liquid crystal display panel is approximately equal to the brightness of the central display portion.
Optionally, the light emitting surface of the light source 100 faces the side surface of the light guide plate 200, and the brightness of the light source 100 gradually attenuates along the direction away from the light source 100, so that the brightness of the central area 200a of the light guide plate 200 at each position is similar, and the density of the second dots 202 distributed in the central area 200a of the light guide plate 200 gradually increases along the direction away from the light source 100. That is, the density of the second dots 202 distributed at the second position in the central area 200a of the light guide plate 200 is positively correlated with the horizontal distance between the light emitting surface of the light source 100 and the second position, and the second position 200 is any position in the central area 200 a. Since the density of the second dots 202 of the light guide plate 200 at each position of the central region 200a is positively correlated with the distance between the position and the light emitting surface of the light source 100. Therefore, the attenuation of the brightness of the light source 100 along the direction away from the light emitting surface of the light source 100 can be compensated, so that the uniformity of the brightness of the central display portion of the liquid crystal display panel is high after the light emitted from the central region 200a of the light guide plate 200 passes through the central display portion.
As shown in fig. 2, the edge region 200b of the light guide plate 200 may have: two first strip-shaped edge regions C1 parallel to the longitudinal direction of the light source 100, and two second strip-shaped edge regions C2 perpendicular to the longitudinal direction of the light source 100. The density of the first dots 201 distributed at the respective positions in each of the first stripe-shaped edge regions C1 may be gradually increased in a direction approaching the central region 200 a. In each of the first stripe-shaped edge regions C2, the density of the first dots 201 distributed at the respective positions is not only gradually increased in the direction approaching the central region 200a but also positively correlated with the horizontal distance between the light-emitting surface of the light source 100 and this position. In this way, the uniformity of the brightness of the liquid crystal display panel at each position is high after the outgoing light of the light guide plate 200 passes through the liquid crystal display panel.
Optionally, referring to fig. 5, fig. 5 is a schematic structural diagram of a backlight module according to an embodiment of the application. The backlight module 000 further comprises: a frame 300, a reflective sheet 400, and an optical film 500. The light source 100, the light guide plate 200, the reflective sheet 300 and the optical film 400 are all located in the frame 300, the optical film 400 is located on a surface of the light guide plate 200 opposite to the surface where the plurality of first dots 201 are located, and the reflective sheet 300 is located on a side of the light guide plate 300 facing away from the optical film 400.
The frame 300 serves to support and fix the light source 100, the light guide plate 200, the reflection sheet 300, and the optical film 400. The light emitted from the light source 100 is transmitted to a side close to the optical film 400 through the light guide plate 200. The reflective sheet 300 may reflect a portion of the light transmitted from the light guide plate 200 to a side close to the reflective sheet 300, and change the transmission direction of the portion of the light so that the portion of the light is also transmitted to a side close to the optical film 400.
The optical film 400 may include a diffusion sheet on the light guide plate 200, and two light enhancement sheets on a side of the diffusion sheet away from the light guide plate 200. The diffusion sheet can make the light transmitted by the light guide plate 200 more uniformly distributed; the light enhancement sheet can enhance the light transmitted by the light guide plate 200.
In summary, the backlight module provided in the embodiment of the application includes: a light source and a light guide plate. The light rays emitted by the light source and reflected by the plurality of first net points are used for being emitted to the edge display part of the liquid crystal display panel. The light emitted by the light source is reflected by the plurality of second net points and is used for being emitted to the central display part of the liquid crystal display panel. In this case, since the density of the first dots distributed at the first position in the edge region is smaller than the density of the second dots distributed at the position adjacent to the first position in the central region of the light guide plate within the light guide plate. Therefore, the light flux emitted from the edge region of the light guide plate is smaller than the light flux emitted from the center region. Thus, after the light with smaller luminous flux emitted from the edge area of the light guide plate is emitted to the edge display part with smaller thickness of the liquid crystal display panel, the light with larger luminous flux emitted from the central area of the light guide plate is emitted to the central display part with larger thickness of the liquid crystal display panel, and the brightness of the edge display part of the liquid crystal display panel can be ensured to be approximately equal to the brightness of the central display part. Therefore, the brightness difference caused by the fact that the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part can be made up by adjusting the density of the first net points in the edge area, so that the uniformity of the display brightness of the liquid crystal display screen is higher, and the display effect of the liquid crystal display screen is effectively improved.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device 00 comprises a middle frame 10 and a liquid crystal display 20; the liquid crystal display 20 includes a liquid crystal display panel and a backlight module 000. The liquid crystal display panel and the backlight module 000 are assembled to obtain the liquid crystal display 20, and then the middle frame 10 and the liquid crystal display 20 are assembled to obtain the terminal equipment. The middle frame 10 is connected to a side of the backlight module 000 facing away from the liquid crystal display panel. After the center 10 is assembled with the liquid crystal display 20 by the pressing force, the edge display portion of the liquid crystal display panel is deformed by the pressing force, resulting in a thickness of the edge display portion of the liquid crystal display panel being smaller than that of the center display portion.
Alternatively, the deformation amount of the liquid crystal display panel gradually decreases in a direction approaching the central display portion. And the deformation amount of the liquid crystal display panel reaches the maximum at the farthest position from the central display portion. That is, the thickness of the liquid crystal display panel at each position in the edge display portion gradually increases in a direction approaching the central display portion, and the difference between the thickness at the position farthest from the central display portion in the edge display portion and the thickness of the central display portion is equal to the maximum deformation amount of the liquid crystal display panel.
In this case, since the deformation amount of the liquid crystal display panel reaches the maximum in the edge display portion, the deformation amount of the edge display portion at each position can be similar, and further, the thickness of the liquid crystal display panel at each position in the edge display portion can be ensured to be similar, and the display brightness is the same, so that the brightness of the liquid crystal display panel at each position in the edge display portion can be compensated by the light guide plate 200 in the backlight module 000 conveniently, and the final brightness of the liquid crystal display 20 at each position is further similar.
In the present application, the edge display portion of the liquid crystal display panel coincides with the edge region 200b of the light guide plate 200, that is, the outer boundary of the orthographic projection of the edge region 200b of the light guide plate 200 on the liquid crystal display panel coincides with the outer boundary of the edge display portion. In this case, since the liquid crystal display panel is deformed at the edge display portion and the edge region 200b of the light guide plate 200 coincides with the deformed region of the liquid crystal display panel, the brightness of the deformed region can be accurately compensated by the light guide plate 200, thereby further making the final brightness of the liquid crystal display 20 at each position similar.
It should be noted that, the light guide plate 200 in the terminal device has the same structure as the light guide plate 200 shown in fig. 1, and accordingly, the light guide principle of the light guide plate 200 is the same as that of the light guide plate 200 shown in fig. 1, and the description thereof will not be repeated.
In summary, the terminal device provided by the embodiment of the application includes a middle frame and a liquid crystal display screen; the liquid crystal display comprises a liquid crystal display panel and a backlight module, wherein the backlight module comprises a light source and a light guide plate. The light rays emitted by the light source and reflected by the plurality of first net points are used for being emitted to the edge display part of the liquid crystal display panel. The light emitted by the light source is reflected by the plurality of second net points and is used for being emitted to the central display part of the liquid crystal display panel. In this case, since the density of the first dots distributed at the first position in the edge region is smaller than the density of the second dots distributed at the position adjacent to the first position in the central region of the light guide plate within the light guide plate. Therefore, the light flux emitted from the edge region of the light guide plate is smaller than the light flux emitted from the center region. Thus, after the light with smaller luminous flux emitted from the edge area of the light guide plate is emitted to the edge display part with smaller thickness of the liquid crystal display panel, the light with larger luminous flux emitted from the central area of the light guide plate is emitted to the central display part with larger thickness of the liquid crystal display panel, and the brightness of the edge display part of the liquid crystal display panel can be ensured to be approximately equal to the brightness of the central display part. Therefore, the brightness difference caused by the fact that the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part can be made up by adjusting the density of the first net points in the edge area, so that the uniformity of the display brightness of the liquid crystal display screen is higher, and the display effect of the liquid crystal display screen is effectively improved.
Referring to fig. 7, fig. 7 is a flowchart of a method for preparing a terminal device according to an embodiment of the present application. The preparation method of the terminal equipment comprises the following steps:
step 701, assembling the backlight module and the liquid crystal display panel to obtain the liquid crystal display.
The backlight module and the liquid crystal display panel can be assembled together through a buckle, and also can be assembled together through glue. It should be noted that, the liquid crystal display panel cannot emit light, the backlight module is connected with the light inlet surface of the liquid crystal display panel, and the backlight module provides a backlight source for the liquid crystal display panel, so that the assembled liquid crystal display screen can display normally.
Step 702, attaching the middle frame to one side of the backlight module, which is away from the liquid crystal display panel, and performing lamination processing on the liquid crystal display screen and the middle frame, so that the middle frame is connected with one side of the backlight module, which is away from the liquid crystal display panel, and the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part.
And the middle frame and one side of the backlight module, which is far away from the liquid crystal display panel, are bonded together through dispensing, and in order to ensure the bonding effectiveness between the liquid crystal display screen and the middle frame, the bonded liquid crystal display screen and the middle frame are subjected to lamination treatment. After the lamination treatment, the middle frame is connected with one side of the backlight module, which is away from the liquid crystal display panel, and the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part.
Optionally, the liquid crystal display screen and the middle frame are pressed by a pressing device. Correspondingly, the pressing process of the liquid crystal display screen and the middle frame can be realized through the following steps (1) to (2):
(1) And placing the laminated middle frame and the laminated liquid crystal display screen in a pressing device, and continuously applying pressing force for a first time period to the middle frame and the laminated liquid crystal display screen through the pressing device.
The pressing force can be continuously applied to the middle frame and the liquid crystal display screen through the pressing device. In order to enable the edge display portion of the liquid crystal display panel to reach the maximum deformation amount at each position, it is necessary to apply a pressing force larger than that applied in the related art. Alternatively, the pressing force may range from 20 newtons to 30 newtons. For example, the pressing force is 25N.
In order to ensure the bonding effectiveness between the liquid crystal display screen and the middle frame, the middle frame is connected with one side of the backlight module, which is away from the liquid crystal display panel, and the pressing device is required to continuously apply a pressing force for a first time period to the middle frame and the liquid crystal display screen. Optionally, the first time period is greater than or equal to 3 hours. For example, the first duration is 4 hours.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a pressing device according to an embodiment of the application. The bonding apparatus 0 includes: a first laminate 1 and a second laminate 2. The first press plate 1 has a receiving groove 3, and the receiving groove 3 has an elastic structure 31 therein. The second press plate 2 has a buffer structure 21. The accommodating groove 3 is used for accommodating the laminated middle frame and the liquid crystal display, and after the laminated middle frame and the liquid crystal display are positioned in the accommodating groove 3, the elastic structure 31 is in contact with the middle frame, and the buffer structure 21 is in contact with the liquid crystal display panel. Optionally, the elastic structure 31 comprises: one end of each compression spring is connected with the groove surface of the containing groove, and the other end of each compression spring is used for supporting the middle frame; wherein the maximum elastic force of the compression spring is greater than or equal to the pressing force.
Optionally, the step of continuously applying the pressing force for the first duration to the middle frame and the liquid crystal display screen through the pressing device includes: and applying a pressing force to the second pressing plate 2 to drive the second pressing plate 2 to move towards the first pressing plate 1 until the second pressing plate 2 stops moving, and continuously applying the pressing force to the second pressing plate 2 for a first time period. Alternatively, the second pressing plate 2 is moved in the direction of the first pressing plate 1 until the first pressing plate 1 and the second pressing plate 2 are in contact, and the second pressing plate 2 is not stopped from moving.
For example, with continued reference to fig. 7, the pressing force applied by the second pressing plate 2 may be provided by magnetic structures 4 provided on the first pressing plate 1 and the second pressing plate 2. In this case. Since the attraction force between the magnetic structures 4 is positively correlated with the magnetic field strength of the magnetic structures 4, in such a manner that the pressing force provided by the magnetic structures 4 is relatively stable in the case where the number of the magnetic structures 4 and the magnetic field strength are constant, it is convenient to continuously apply the pressing force to the second pressing plate 2 for the first period of time.
(2) And taking the attached middle frame and the attached liquid crystal display out of the accommodating groove, and standing for a second period of time.
In order to further ensure the bonding effectiveness between the liquid crystal display and the middle frame, the liquid crystal display needs to be kept stand for a second period of time after the pressure maintaining treatment. Optionally, the second time period is greater than or equal to 7 hours. For example, the second time period is 8 hours.
In summary, in the method for manufacturing a terminal device according to the embodiment of the present application, light rays reflected by the plurality of first dots among the light rays emitted from the light source are used to be directed to an edge display portion of the liquid crystal display panel. The light emitted by the light source is reflected by the plurality of second net points and is used for being emitted to the central display part of the liquid crystal display panel. In this case, since the density of the first dots distributed at the first position in the edge region is smaller than the density of the second dots distributed at the position adjacent to the first position in the central region of the light guide plate within the light guide plate. Therefore, the light flux emitted from the edge region of the light guide plate is smaller than the light flux emitted from the center region. Thus, after the light with smaller luminous flux emitted from the edge area of the light guide plate is emitted to the edge display part with smaller thickness of the liquid crystal display panel, the light with larger luminous flux emitted from the central area of the light guide plate is emitted to the central display part with larger thickness of the liquid crystal display panel, and the brightness of the edge display part of the liquid crystal display panel can be ensured to be approximately equal to the brightness of the central display part. Therefore, the brightness difference caused by the fact that the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part can be made up by adjusting the density of the first net points in the edge area, so that the uniformity of the display brightness of the liquid crystal display screen is higher, and the display effect of the liquid crystal display screen is effectively improved.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present application, which is not described herein.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (12)
1. A backlight module, comprising: a light source (100) and a light guide plate (200);
the light emergent surface of the light source (100) faces the side surface of the light guide plate (200);
the light guide plate (200) is provided with a central area (200 a) and an edge area (200 b) positioned at the periphery of the central area (200 a), a plurality of first mesh points (201) are arranged in the edge area (200 b), a plurality of second mesh points (202) are arranged in the central area (200 a), and the density of the first mesh points (201) distributed at a first position in the edge area (200 b) is smaller than the density of the second mesh points (202) distributed at a position adjacent to the first position in the central area (200 a), wherein the first position is any position in the edge area (200 b);
the light rays emitted by the light source (100) and reflected by the first mesh points (201) are used for being emitted to an edge display part of the liquid crystal display panel, the light rays emitted by the light source (100) and reflected by the second mesh points (202) are used for being emitted to a central display part of the liquid crystal display panel, and the thickness of the edge display part is smaller than that of the central display part.
2. A backlight module according to claim 1, wherein the density of the first dots (201) distributed at each position in the edge region (200 b) gradually increases in a direction approaching the central region (200 a).
3. A backlight module according to claim 1, wherein the density of the second dots (202) distributed at a second location in the central area (200 a) is positively correlated with the horizontal distance between the light exit surface of the light source (100) and the second location, the second location being any location within the central area (200 a).
4. A backlight module according to any one of claims 1 to 3, wherein the width of the edge area (200 b) is in the range of 4 mm to 6 mm.
5. A backlight module according to any one of claims 1 to 3, wherein the plurality of first dots (201) and the plurality of second dots (202) are distributed on the same plate surface of the light guide plate (200).
6. A backlight module according to claim 5, further comprising: a frame (300), a reflection sheet (400), and an optical film (500);
the light source (100), the light guide plate (200), the reflecting sheet (400) and the optical film (500) are all located in the frame body (300), the optical film (500) is located on one surface, opposite to the surface where the plurality of first net points (201) are arranged, of the light guide plate (200), and the reflecting sheet (400) is located on one side, deviating from the optical film (500), of the light guide plate (200).
7. A terminal device, comprising: a middle frame (10) and a liquid crystal display (20);
the liquid crystal display (20) includes: a liquid crystal display panel and the backlight module of any one of claims 1 to 6;
the middle frame (10) is connected with one side of the backlight module, which is away from the liquid crystal display panel;
wherein the thickness of the edge display portion of the liquid crystal display panel is smaller than the thickness of the center display portion.
8. The terminal device according to claim 7, wherein a thickness at each position in the edge display portion gradually increases in a direction approaching the center display portion, and a difference between a thickness at a position farthest from the center display portion in the edge display portion and a thickness of the center display portion is equal to a maximum deformation amount of the liquid crystal display panel.
9. A terminal device according to claim 7 or 8, characterized in that the outer boundary of the orthographic projection of the edge area (200 b) of the light guide plate (200) on the liquid crystal display panel coincides with the outer boundary of the edge display portion.
10. A method for preparing a terminal device, the method comprising:
assembling the backlight module according to any one of claims 1 to 6 with a liquid crystal display panel to obtain a liquid crystal display;
and attaching the middle frame to one side of the backlight module, which is away from the liquid crystal display panel, and performing lamination treatment on the liquid crystal display screen and the middle frame, so that the middle frame is connected with one side of the backlight module, which is away from the liquid crystal display panel, and the thickness of the edge display part of the liquid crystal display panel is smaller than that of the central display part.
11. The method of claim 10, wherein the step of bonding the liquid crystal display to the center comprises:
placing the bonded middle frame and the bonded liquid crystal display screen in a pressing device, and continuously applying pressing force for a first time period to the middle frame and the liquid crystal display screen through the pressing device;
taking out the bonded middle frame and the bonded liquid crystal display screen from the accommodating groove, and standing for a second period of time;
wherein, the compression fittings includes: the first pressing plate is provided with a containing groove and an elastic structure positioned in the containing groove, and the second pressing plate is provided with a buffer structure;
the holding tank is used for holding after the laminating the center with liquid crystal display, after the laminating the center with liquid crystal display is located behind the holding tank, elastic structure with the center contact, and make buffer structure with liquid crystal display panel contact.
12. The method of claim 11, wherein the pressing force is in the range of 20 newtons to 30 newtons, the first time period is greater than or equal to 3 hours, and the second time period is greater than or equal to 7 hours.
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| CN202210351894.3A CN116931322B (en) | 2022-04-02 | 2022-04-02 | Backlight module, terminal equipment and assembling method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1165312A (en) * | 1995-09-14 | 1997-11-19 | 夏普株式会社 | Liquid crystal display element |
| KR19990015820A (en) * | 1997-08-11 | 1999-03-05 | 윤종용 | Backlight structure of LCD module |
| CN1916722A (en) * | 2005-08-18 | 2007-02-21 | 鸿富锦精密工业（深圳）有限公司 | Plate of guiding light, backlight module, and double-faced liquid crystal display device |
| CN205809495U (en) * | 2016-07-21 | 2016-12-14 | 合肥京东方光电科技有限公司 | A kind of display floater and display device |
| CN107843950A (en) * | 2017-10-11 | 2018-03-27 | 漳州立达信光电子科技有限公司 | A method for optimal design of dots of light guide plate |
| CN210776090U (en) * | 2019-11-08 | 2020-06-16 | 威海东山精密光电科技有限公司 | A liquid crystal module pressing fixture |
| CN111381405A (en) * | 2018-12-28 | 2020-07-07 | 松下液晶显示器株式会社 | Liquid crystal display device having a plurality of pixel electrodes |
-
2022
- 2022-04-02 CN CN202210351894.3A patent/CN116931322B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1165312A (en) * | 1995-09-14 | 1997-11-19 | 夏普株式会社 | Liquid crystal display element |
| KR19990015820A (en) * | 1997-08-11 | 1999-03-05 | 윤종용 | Backlight structure of LCD module |
| CN1916722A (en) * | 2005-08-18 | 2007-02-21 | 鸿富锦精密工业（深圳）有限公司 | Plate of guiding light, backlight module, and double-faced liquid crystal display device |
| CN205809495U (en) * | 2016-07-21 | 2016-12-14 | 合肥京东方光电科技有限公司 | A kind of display floater and display device |
| CN107843950A (en) * | 2017-10-11 | 2018-03-27 | 漳州立达信光电子科技有限公司 | A method for optimal design of dots of light guide plate |
| CN111381405A (en) * | 2018-12-28 | 2020-07-07 | 松下液晶显示器株式会社 | Liquid crystal display device having a plurality of pixel electrodes |
| CN210776090U (en) * | 2019-11-08 | 2020-06-16 | 威海东山精密光电科技有限公司 | A liquid crystal module pressing fixture |
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| CN116931322B (en) | 2026-02-06 |
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