CN113759601A - Backlight module and display device - Google Patents
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- CN113759601A CN113759601A CN202110990782.8A CN202110990782A CN113759601A CN 113759601 A CN113759601 A CN 113759601A CN 202110990782 A CN202110990782 A CN 202110990782A CN 113759601 A CN113759601 A CN 113759601A
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- G—PHYSICS
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- 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
- G02F1/133603—Direct backlight with LEDs
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Abstract
The application relates to the technical field of display, in particular to a backlight module and a display device. The backlight module is divided into: the projection of the first area on the display screen is superposed with the light emergent area; the second area surrounds the first area, and the projection of the second area on the display screen is overlapped with the non-light-emitting area; the first area is provided with a first light-emitting structure, the position, close to the second area, of the first area is additionally provided with a second light-emitting structure, and/or the second area is provided with a second light-emitting structure. In order to optimize a display product adopting a Mini LED, the frame of the display product has a serious dark edge phenomenon, the position of the first area close to the second area is subjected to optical compensation in a mode of arranging a second light-emitting structure in the second area and/or in a mode of directly additionally arranging the second light-emitting structure at the position of the first area close to the second area, so that the light-emitting area of the display screen has the same display effect, and the problem of a black frame is solved.
Description
Technical Field
The present application generally relates to the field of display technologies, and in particular, to a backlight module and a display device.
Background
With the rapid development of the Mini LED display technology, the Mini LED display products have been applied to ultra-large screen high definition display, such as commercial fields of monitoring and commanding, high definition broadcasting, high-end cinema, medical diagnosis, advertisement display, conference exhibition, office display, virtual reality, etc.
The 12.9iPad Pro 2021 also carries Mini LED backlight technology. Feedback from the current network, besides the problem of light overflow, the periphery of the screen of the new iPad Pro has a circle of dark edges, most of the dark edges are dark edges, and a few of the dark edges are green. Moreover, iPad Pro using Mini LED backlight technology does have a more severe dark-edge phenomenon than other models, and this phenomenon is very common.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to solve the technical problem that iPad Pro adopting the Mini LED backlight technology has a serious dark edge phenomenon in the prior art, the application provides a backlight module and a display device.
In order to achieve the purpose of the invention, the following technical scheme is adopted in the application:
according to a first aspect of embodiments of the present application, there is provided a backlight module, the backlight module being divided into: the projection of the first area on the display screen is superposed with the light emergent area; the second area surrounds the first area, and the projection of the second area on the display screen is overlapped with the non-light-emitting area; the first area is provided with a first light-emitting structure, the position, close to the second area, of the first area is additionally provided with a second light-emitting structure, and/or the second area is provided with a second light-emitting structure.
In an optional implementation manner of the present application, the backlight module further includes a control unit, and the control unit is electrically connected to the second light emitting structure to control the light emitting intensity of the second light emitting structure.
In an alternative embodiment of the present application, the second light emitting structures are disposed in the second region, the number of the first light emitting structures in the unit light region of the first region is n1, and the number of the second light emitting structures in the unit light region of the second region is n2, where n1 is not more than n 2.
In an alternative embodiment of the present application, four first light emitting structures are disposed in the unit light region of the first region.
In an alternative embodiment of the present application, a second light emitting structure is added to the first region near the second region, the sum of the numbers of the first light emitting structures and the second light emitting structures in the unit light region of the first region near the second region is N, and the numbers of the first light emitting structures in the unit light regions of the remaining first regions are N1, where N1 is not more than N.
In an alternative embodiment of the present application, a second light emitting structure is added to the first region near the second region, the sum of the numbers of the first light emitting structure and the second light emitting structure in a unit light region at a corner of the first region near the second region is N1, and the sum of the numbers of the first light emitting structure and the second light emitting structure in a unit light region at an edge of the first region near the second region is N2, where N1 < N2.
In an alternative embodiment of the present application, the sum of the numbers of the first and second light emitting structures of the unit light region located at the corner of the first region close to the second region is nine.
In an alternative embodiment of the present application, a sum of the numbers of the first and second light emitting structures of the unit light region located at an edge of the first region close to the second region is six.
In an optional embodiment of the present application, the first light emitting structure and the second light emitting structure are Mini LEDs.
In an alternative embodiment of the present application, the rectangular array of Mini LEDs is arranged in the first region or the second region.
According to a second aspect of the embodiments of the present application, there is provided a display device, including a screen, a cover plate, and the backlight module according to any one of the embodiments of the first aspect; the screen is arranged on one side of the backlight module, and the cover plate is arranged on one side of the screen, which deviates from the backlight module.
In an alternative embodiment of the present application, the screen is an LCD screen.
The application discloses backlight unit and display device's advantage lies in with positive effect:
the backlight module of the embodiment of the application, in order to optimize the display product that adopts Mini LED, its frame department has serious dark edge phenomenon, adopt the mode that sets up second light emitting structure in the second region, and/or, the mode that directly adds second light emitting structure near the second region department in first region, come to carry out optical compensation to the position that the first region is close to the second region, make the play light zone of display screen everywhere have the same display effect, thereby improve the black frame problem.
The display device comprising the backlight module has the same technical advantages as the backlight module, and is not described in detail herein.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a backlight module according to a second embodiment of the present application.
Wherein the reference numerals are as follows:
1. a backlight plate; 11. a first region; 12. a second region; 2. a first light emitting structure; 3. a second light emitting structure; 4. a screen; 5. and (7) a cover plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
With the rapid development of the Mini LED display technology, the Mini LED display products have been applied to ultra-large screen high definition display, such as commercial fields of monitoring and commanding, high definition broadcasting, high-end cinema, medical diagnosis, advertisement display, conference exhibition, office display, virtual reality, etc. The 12.9iPad Pro 2021 also carries Mini LED backlight technology. Feedback from the current network, besides the problem of light overflow, the periphery of the screen of the new iPad Pro has a circle of dark edges, most of the dark edges are dark edges, and a few of the dark edges are green. Moreover, iPad Pro using Mini LED backlight technology does have a more severe dark-edge phenomenon than other models, and this phenomenon is very common.
In view of the foregoing problems, embodiments of the present disclosure provide a backlight module and a display device, which can improve the edge blackening phenomenon when a product is displayed on a white or other bright screen by using the backlight scheme.
Embodiment one of the backlight module
Fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present application; fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure, and as shown in fig. 1 and fig. 2, the embodiment of the present disclosure provides a backlight module, which is divided into: a first region 11, wherein the projection of the first region 11 on the display screen is overlapped with the light emergent region; the second area 12 surrounds the first area 11, and the projection of the second area 12 on the display screen is overlapped with a non-light-emitting area; wherein the first region 11 is provided with a first light emitting structure 2, and the second region 12 is provided with a second light emitting structure 3.
In the backlight module of the embodiment of the application, in order to optimize a display product adopting a Mini LED, the frame of the display product has a serious dark edge phenomenon, and the second light-emitting structure 3 is arranged in the second region 12 to perform light compensation on the position, close to the second region 12, of the first region 11, so that the light-emitting regions of the display screen have the same display effect, and the black frame problem is improved.
In a specific implementation, the second light emitting structures 3 are disposed in the second region 12, the number of the first light emitting structures 2 in the unit light region of the first region 11 is n1, and the number of the second light emitting structures 3 in the unit light region of the second region 12 is n2, where n1 is not more than n 2. The arrangement mode enables the density of the first light-emitting structures 2 at each position on the whole backlight plate 1 to be less than or equal to that of the second light-emitting structures 3, and the density of the second light-emitting structures 3 in the second area 12 is high, so that light compensation is carried out on the position, close to the second area 12, of the first area 11, and black frames are prevented from appearing. Specifically, four first light emitting structures 2 are disposed in the unit light region of the first region 11.
Second embodiment of the backlight module
Fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present application; fig. 3 is a schematic structural diagram of a backlight module according to a second embodiment of the present disclosure, and as shown in fig. 1 and fig. 3, on the basis of the first embodiment, the first embodiment of the present disclosure provides a backlight module, where the backlight module is divided into: a first region 11, wherein the projection of the first region 11 on the display screen is overlapped with the light emergent region; the second area 12 surrounds the first area 11, and the projection of the second area 12 on the display screen is overlapped with a non-light-emitting area; the first region 11 is provided with a first light emitting structure 2, and the first region 11 is provided with a second light emitting structure 3 near the second region 12.
In the backlight module of the embodiment of the application, in order to optimize a display product adopting a Mini LED, the frame of the display product has a serious dark edge phenomenon, and the position of the first area 11 close to the second area 12 is optically compensated by directly adding the second light-emitting structure 3 at the position of the first area 11 close to the second area 12, so that the light-emitting area of the display screen has the same display effect, and the black frame problem is improved.
In specific implementation, a second light emitting structure 3 is additionally arranged in a position, close to a second region 12, of the first region 11, the sum of the numbers of the first light emitting structures 2 and the second light emitting structures 3 in a unit light region of the first region 11, close to the second region 12, is N, and the numbers of the first light emitting structures 2 in unit light regions of the remaining first regions 11 are N1, wherein N1 is not more than N. The density of the light emitting elements of the first region 11 close to the second region 12 is set to be the same as or greater than the density of the light emitting elements of the first region 11 at other positions, so that the position of the first region 11 close to the second region 12 is better optically compensated, and black frames are prevented from appearing.
Further, a second light emitting structure 3 is additionally arranged at the position, close to the second region 12, of the first region 11, the sum of the numbers of the first light emitting structures 2 and the second light emitting structures 3 in a unit light region at the corner, close to the second region 12, of the first region 11 is N1, and the sum of the numbers of the first light emitting structures 2 and the second light emitting structures 3 in a unit light region at the edge, close to the second region 12, of the first region 11 is N2, wherein N1 < N2. Because the first region 11 of corner is close to the second region 12 position and shelters from more seriously to set up the density of the light emitting component of corner to be greater than the density of the light emitting component at edge, thereby realize even luminous, prevent that the black frame at corner from appearing.
Specifically, the sum of the numbers of the first light emitting structures 2 and the second light emitting structures 3 of the unit light regions located at the corners of the first region 11 near the second region 12 is nine. The sum of the numbers of the first and second light emitting structures 2 and 3 per unit light region located at the edge of the first region 11 close to the second region 12 is six.
Embodiment III of the backlight module
Fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present application; fig. 2 is a schematic structural diagram of a backlight module according to a second embodiment of the present application; fig. 3 is a schematic structural diagram of a backlight module according to a second embodiment of the present application, and as shown in fig. 1 to 3, in combination with the first embodiment and the second embodiment, the second embodiment of the present application provides a backlight module, which is divided into: a first region 11, wherein the projection of the first region 11 on the display screen is overlapped with the light emergent region; the second area 12 surrounds the first area 11, and the projection of the second area 12 on the display screen is overlapped with a non-light-emitting area; the first region 11 is provided with a first light emitting structure 2, the first region 11 is provided with a second light emitting structure 3 near a second region 12, and/or the second region 12 is provided with a second light emitting structure 3.
The backlight module of the embodiment of the application, in order to optimize the display product that adopts Mini LED, its frame department has serious dark edge phenomenon, adopt the mode that sets up second light emitting structure 3 at second region 12, and/or, the mode that directly adds second light emitting structure 3 in first region 11 department near second region 12, come to carry out optical compensation to the position that first region 11 is close to second region 12, make the play light zone of display screen everywhere have the same display effect, thereby improve the black frame problem.
In specific implementation, in the second region 12, the second light emitting structures 3 are disposed, the number of the first light emitting structures 2 in the unit light region of the first region 11 is n1, and the number of the second light emitting structures 3 in the unit light region of the second region 12 is n2, where n1 is not more than n 2. The arrangement mode enables the density of the first light-emitting structures 2 at each position on the whole backlight plate 1 to be less than or equal to that of the second light-emitting structures 3, and the density of the second light-emitting structures 3 in the second area 12 is high, so that light compensation is carried out on the position, close to the second area 12, of the first area 11, and black frames are prevented from appearing. Specifically, four first light emitting structures 2 are disposed in the unit light region of the first region 11.
And, a second light emitting structure 3 is additionally arranged in the first region 11 near the second region 12, the sum of the numbers of the first light emitting structures 2 and the second light emitting structures 3 in the unit light region of the first region 11 near the second region 12 is N, and the numbers of the first light emitting structures 2 in the unit light regions of the remaining first regions 11 are N1, wherein N1 is not more than N. The density of the light emitting elements of the first region 11 close to the second region 12 is set to be the same as or greater than the density of the light emitting elements of the first region 11 at other positions, so that the position of the first region 11 close to the second region 12 is better optically compensated, and black frames are prevented from appearing.
Further, a second light emitting structure 3 is additionally arranged at the position, close to the second region 12, of the first region 11, the sum of the numbers of the first light emitting structures 2 and the second light emitting structures 3 in a unit light region at the corner, close to the second region 12, of the first region 11 is N1, and the sum of the numbers of the first light emitting structures 2 and the second light emitting structures 3 in a unit light region at the edge, close to the second region 12, of the first region 11 is N2, wherein N1 < N2. Because the first region 11 of corner is close to the second region 12 position and shelters from more seriously to set up the density of the light emitting component of corner to be greater than the density of the light emitting component at edge, thereby realize even luminous, prevent that the black frame at corner from appearing.
Specifically, the sum of the numbers of the first light emitting structures 2 and the second light emitting structures 3 of the unit light regions located at the corners of the first region 11 near the second region 12 is nine. The sum of the numbers of the first and second light emitting structures 2 and 3 per unit light region located at the edge of the first region 11 close to the second region 12 is six.
Embodiment four of the backlight module
Fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present application; fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present application; fig. 3 is a schematic structural diagram of a backlight module according to a second embodiment of the present application, please continue to refer to fig. 1-3, and on the basis of the first embodiment, the second embodiment and the third embodiment, the backlight module further includes a control unit electrically connected to the second light-emitting structure 33, so as to control the light-emitting intensity of the second light-emitting structure 33. The luminous intensity of the luminous element in the compensation lamp area can be independently controlled, and the appropriate compensation light intensity is set based on the actual debugging condition, so that the best compensation effect is achieved, and the black frame problem is reduced to the greatest extent.
The first light emitting structure 22 and the second light emitting structure 33 are Mini LEDs. Mini LED, i.e. sub-millimeter light emitting diode, refers to LED device with chip size between 50-200 μm. With the rapid development of the Mini LED display technology, the Mini LED display products have been applied to ultra-large screen high definition display, such as commercial fields of monitoring and commanding, high definition broadcasting, high-end cinema, medical diagnosis, advertisement display, conference exhibition, office display, virtual reality, etc.
In some embodiments, the Mini LEDs are rectangular arrayed in the first zone 11 or the second zone 12. Because the display component is the rectangle frame to Mini LED rectangular array is in above-mentioned region, makes the Mini LED of every unit light zone distribute evenly, thereby final demonstration is the same all luminous effect everywhere on the display component, prevents that the luminance of light everywhere on same display screen is inconsistent, leads to user's experience effect poor problem to appear.
In addition, the Mini LEDs may be uniformly disposed in the first region 11 or the second region 12 by other methods, for example, the display screen is circular, and the Mini LEDs may be in a circumferential array, as long as the effect of uniform distribution on the display member is achieved, which is not limited herein.
Specifically, the first region 1111 is divided into 16 unit light regions, the 16 unit light regions are uniformly arranged, and four Mini LEDs in each unit light region are taken as an example, and 64 Mini LEDs are provided in total.
Example V regarding the display device
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application, please continue to refer to fig. 1, and on the basis of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, the embodiment of the present application provides a display device, which includes a screen 4, a cover plate 5 and a backlight module according to any one of the embodiments of the first aspect; the screen 4 is arranged on one side of the backlight module, and the cover plate 5 is arranged on one side of the screen 4 departing from the backlight module.
Wherein the screen 4 is an LCD screen 4. LCD (short for Liquid Crystal Display) Liquid Crystal Display. The LCD is constructed by placing liquid crystal cells between two parallel glass substrates, arranging TFT (thin film transistor) on the lower substrate glass, arranging color filter on the upper substrate glass, and controlling the rotation direction of liquid crystal molecules by changing the signal and voltage on the TFT, so as to control whether polarized light of each pixel point is emitted or not to achieve the purpose of display.
In addition, the cover plate 5 is divided into a light emergent area and a non-light emergent area (i.e. a frame), and due to the arrangement mode and the arrangement mode of the Mini LEDs, black or green shadows are easily generated between the light emergent area and the non-light emergent area.
It is noted that in the description and claims of the present application and in the above-mentioned drawings, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Also, the terms "comprises," "comprising," and "having," as well as any variations thereof or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications and changes to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A backlight module, characterized in that the backlight module is divided into:
the projection of the first area on the display screen is superposed with the light emergent area; and the number of the first and second groups,
the second area surrounds the first area, and the projection of the second area on the display screen is superposed with the non-light-emitting area;
the first area is provided with a first light-emitting structure, the position, close to the second area, of the first area is additionally provided with a second light-emitting structure, and/or the second area is provided with a second light-emitting structure.
2. The backlight module as claimed in claim 1, wherein the backlight module further comprises a control unit electrically connected to the second light emitting structure for controlling the intensity of the light emitted by the second light emitting structure.
3. The backlight module of claim 1, wherein the second light emitting structures are disposed in the second region, the number of the first light emitting structures in the unit light region of the first region is n1, and the number of the second light emitting structures in the unit light region of the second region is n2, wherein n1 is not more than n 2.
4. The backlight module of claim 3, wherein four first light emitting structures are disposed in a unit light area of the first region.
5. The backlight module as claimed in claim 1, wherein a second light emitting structure is additionally provided at the first region near the second region, the sum of the numbers of the first light emitting structures and the second light emitting structures of the unit light regions of the first region near the second region is N, and the number of the first light emitting structures of the unit light regions of the remaining first regions is N1, wherein N1 is ≦ N.
6. The backlight module of claim 1, wherein a second light emitting structure is additionally provided at the first region near the second region, a sum of the numbers of the first light emitting structure and the second light emitting structure in a unit light region at a corner of the first region near the second region is N1, and a sum of the numbers of the first light emitting structure and the second light emitting structure in a unit light region at an edge of the first region near the second region is N2, wherein N1 < N2.
7. The backlight module according to claim 5 or 6, wherein the sum of the numbers of the first light emitting structures and the second light emitting structures of the unit light regions at the corners of the first region close to the second region is nine.
8. The backlight module according to claim 5 or 6, wherein the sum of the number of the first light emitting structures and the number of the second light emitting structures per unit light area at the edge of the first region close to the second region is six.
9. The backlight module as claimed in claim 1, wherein the first and second light emitting structures are Mini LEDs.
10. The backlight module as claimed in claim 9, wherein the MiniLED rectangular array is arranged in the first region or the second region.
11. A display device comprising a screen, a cover plate and a backlight module according to any one of claims 1 to 10;
the screen is arranged on one side of the backlight module, and the cover plate is arranged on one side of the screen, which deviates from the backlight module.
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| CN202110990782.8A CN113759601A (en) | 2021-08-26 | 2021-08-26 | Backlight module and display device |
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