CN214174776U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN214174776U CN214174776U CN202022748511.5U CN202022748511U CN214174776U CN 214174776 U CN214174776 U CN 214174776U CN 202022748511 U CN202022748511 U CN 202022748511U CN 214174776 U CN214174776 U CN 214174776U
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Abstract
The application discloses a backlight module and a display device; the backlight module comprises a back plate; a light guide plate disposed on the back plate; comprises a first light guide plate and a second light guide plate; and a light source assembly including a first light source assembly and a second light source assembly, wherein the second light guide plate is disposed around the first light guide plate; the first light source assembly provides a light source for the first light guide plate; the second light source assembly provides a light source for the second light guide plate; the brightness of the first light source assembly and the brightness of the second light source assembly are respectively and independently controlled. Through the luminance of the first light guide plate and the second light guide plate of the independent control respectively of corresponding light source subassembly, it is energy-conserving relatively parallel subregion, realizes many subregion functional design and dynamic intelligence simultaneously and is shaded.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
Currently, a backlight module applied to a liquid crystal display panel generally has a light-emitting diode (LED) light bar disposed at a side of a light guide plate, light emitted from the LED light bar is incident from a light incident surface of the light guide plate, the light is totally reflected in the light guide plate, and the dots arranged on the light-emitting surface of the light guide plate destroy the total reflection of the light in the light guide plate, so that the light is uniformly emitted from the light-emitting surface of the light guide plate to realize conversion from a point light source to a surface light source, wherein, the edge of the liquid crystal panel is provided with a light source, and the light guide plate is matched with the side-entry backlight module to transmit the light emitted from the edge of the panel to the central area of the panel through the light guide plate, however, the lateral backlight module diffuses the backlight through a light guide plate, the transmission of light in the light guide plate is not controllable, the local brightness control of the screen cannot be realized, and the multi-partition functional design cannot be realized.
How to control the brightness of the light guide plate of the side-in type backlight module in a partition manner, the energy-saving purpose can be achieved without affecting the viewing quality, and the light guide plate becomes the research direction of the backlight module.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a backlight module and a display device, and the aim of saving energy is achieved by controlling brightness in a partitioning mode.
The application discloses backlight unit includes:
a back plate;
a light guide plate disposed on the back plate; comprises a first light guide plate and a second light guide plate; and
a light source assembly comprising a first light source assembly and a second light source assembly,
wherein the second light guide plate is disposed around the first light guide plate;
the first light source assembly provides a light source for the first light guide plate;
the second light source assembly provides a light source for the second light guide plate;
the brightness of the first light source assembly and the brightness of the second light source assembly are respectively and independently controlled.
Optionally, the first light source assembly is disposed at the periphery of the first light guide plate; the second light source assembly is arranged at the periphery of the second light guide plate; the first light source assembly emits light along the inner direction and the peripheral direction of the backlight module respectively and emits light into the first light guide plate and the second light guide plate respectively; and the second light source component emits light along the internal direction of the backlight module and emits the light into the second light guide plate.
Optionally, the first light source assembly is disposed around the periphery of the first light guide plate; the second light source assembly is arranged around the periphery of the second light guide plate.
Optionally, the first light source assembly is disposed around the periphery of the first light guide plate; the second light guide plate is correspondingly arranged on any one or more sides of the second light guide plate; and a reflecting structure is arranged at the edge of the second light guide plate, which is not provided with the second light source component.
Optionally, the first light source assembly is disposed at the periphery of the first light guide plate; the second light source assembly is arranged at the periphery of the second light guide plate; the first light source assembly and the second light source assembly emit light along the inner direction of the backlight module and respectively enter the first light guide plate and the second light guide plate.
Optionally, the first light source assembly and the second light source assembly are both disposed at the periphery of the first light guide plate, and the first light source assembly emits light along the direction inside the backlight module and enters the first light guide plate; and the second light source component emits light into the second light guide plate along the external direction of the backlight module.
Optionally, the first light guide plate includes four first corner regions and side regions; the four first corner areas are of circular arc structures;
the first corner area is positioned at four corner positions of the first light guide plate, and the side area is positioned at an edge position of the first light guide plate;
the first light source component and the second light source component are correspondingly arranged along the four first corner areas and the four side areas in a surrounding mode.
Optionally, the second light guide plate includes four second corner regions, and the four second corner regions are located at four corners of the second light guide plate;
the second light guide plate comprises a plurality of sub light guide plates, and the second light source assembly is arranged at the edge of the sub light guide plates;
the first light source assembly is arranged around the periphery of the first light guide plate; the first light source assembly emits light along the inner direction and the peripheral direction of the backlight module respectively and emits light into the first light guide plate and the second light guide plate respectively.
Optionally, the second light source assembly is disposed at a long side of each sub light guide plate; and a reflection structure is arranged on the short side of the sub light guide plate.
A display device comprises the backlight module and a display panel.
The light guide plate is divided into the peripheral light guide plate and the central light guide plate, the brightness of the first light guide plate and the brightness of the second light guide plate are respectively and independently controlled through the corresponding light source assemblies, the brightness of the first light guide plate can be independently adjusted to be proper, and the brightness of the corresponding second light guide plate can be adjusted to be low or high according to requirements; therefore, the brightness of the whole screen is adjusted, and multi-partition function design and dynamic intelligent backlight are realized; for the partition, compared with the whole display effect, in the actual video playing process, the central area of most pictures generally needs higher brightness than the peripheral area; if a left-right parallel partitioning mode is adopted, all the partitions relate to a central area, the priority of middle display is higher than that of display adjustment, the brightness is required to be uniformly improved to meet the display requirement of the central area, and the power consumption is overhigh; in the square-clip-shaped partition, the middle edge is independently controlled, the brightness of the edge area can be properly reduced without influencing the watching of a user, and only the central area is adjusted to the normal brightness, so that the energy is saved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic view of a backlight module according to an embodiment of the present application;
FIG. 2 is a schematic view of a backlight module according to another embodiment of the present application;
FIG. 3 is a schematic view of a backlight module according to another embodiment of the present application;
FIG. 4 is a schematic view of a backlight module according to another embodiment of the present application;
FIG. 5 is a schematic view of a backlight module according to another embodiment of the present application;
fig. 6 is a schematic view of a backlight module according to another embodiment of the present application.
100, a back plate; 110. a light guide plate; 111. a first light guide plate 112 and a second light guide plate; 113. a first side; 114. a second edge; 115. a third side; 116. a fourth side; 101 a reflective structure; 117. a first reflective structure; 118. a second reflecting mechanism; 119. a third reflective structure; 120. a light source assembly; 121. a first light source assembly; 122. a second light source assembly; 130. a first corner region; 140. a side region; 150. a second corner region; 160. a first sub light guide plate; 170. a second sub light guide plate; 180. a third sub light guide plate; 190. a fourth sub light guide plate; 200. a display device; 210. an optical tuning control; 220. a substrate; 230 a backlight module; 240. a display panel.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.
Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The present application is described in detail below with reference to the figures and alternative embodiments.
As shown in fig. 1, as an embodiment of the present application, a display device 200 is disclosed, where the display device 200 includes a display panel 240, an optical adjustment control component 210, and a backlight module 230; the display panel 240 includes a substrate 220, and the backlight module 230 includes: a back plate 100, a light guide plate, and a light source assembly; the light guide plate is disposed on the back plate 100, and the light source assembly includes a first light source assembly 121 and a second light source assembly 122, wherein the light guide plate includes a first light guide plate 111 and a second light guide plate 112; the second light guide plate 112 is disposed around the first light guide plate 111; the first light source assembly 121 provides a light source 122 for the first light guide plate 111; the second light source assembly 122 provides a light source for the second light guide plate 112; the luminance of the first light source assembly and the luminance of the second light source assembly 122 are separately controlled.
In the present application, the light guide plates are divided into the first light guide plate 111 and the second light guide plate 112, the second light guide plate 112 is disposed around the first light guide plate 111 and is shaped like a Chinese character 'hui', the luminance of the first light guide plate 111 and the luminance of the second light guide plate 112 are separately controlled by the corresponding first light source assembly 121 and the corresponding second light source assembly 122, the luminance of the first light guide plate 111 can be separately adjusted to a suitable luminance, and the luminance of the corresponding second light guide plate 112 can be adjusted to be lower or higher as required; therefore, the brightness of the whole screen is adjusted, and multi-partition function design and dynamic intelligent backlight are realized.
For the partition, compared with the whole display effect, in the actual video playing process, the central area of most pictures generally needs higher brightness than the peripheral area; the left and right parallel partitions relate to a central area, brightness is required to be improved uniformly to meet the requirement of display of the highest brightness area, the brightness of the edge area can be properly reduced under the condition that a user watches the display screen without being influenced by the square-shaped partitions, and only the central area is adjusted to be normal brightness, so that the display screen is more energy-saving.
How much brightness is required for the corresponding first and second light guide plates 111 and 112 is determined according to the backlight brightness required for the pixel with the maximum brightness in the area. The other pixels determine how much transmittance is needed based on the maximum luminance determined for the frame and how much luminance the pixel actually needs to display. The first light guide plate 111 is a central light guide plate, and the second light guide plate 112 is a peripheral light guide plate.
Further, as shown in fig. 2, as an embodiment of the present application, a backlight module 230 is disclosed, which includes a back plate 100, a light guide plate and a light source assembly; the light guide plate is disposed on the rear plate 100; the light source assemblies include a first light source assembly 121 and a second light source assembly 122, the first light source assembly 121 is correspondingly disposed around the periphery of the first light guide plate 111, the second light source assembly 122 is correspondingly disposed around the periphery of the second light guide plate 112, and the first light source assembly 121 emits light simultaneously along a first direction C1 (backlight module inner direction) and a second direction C2 (backlight module outer direction) and enters the first light guide plate 111 and the second light guide plate 112; the second light source assembly 121 emits light in a first direction and enters the second light guide plate 112.
In the present application, the light guide plates are divided into the first light guide plate 111 and the second light guide plate 112, the first light source assembly 121 correspondingly and separately controls the brightness of the first light guide plate 111 and the second light guide plate 112, the second light source assembly 122 is disposed around the second light guide plate 112 to control the brightness of the second light guide plate 112, the brightness of the first light guide plate 111 can be separately adjusted to a suitable brightness (average brightness), and the brightness of the corresponding second light guide plate 112 can be adjusted to be lower or higher according to the requirement; therefore, the brightness of the whole screen is adjusted, and multi-partition function design and dynamic intelligent backlight are realized. For the partition, compared with the whole display effect, in the actual video playing process, the central area of most pictures generally needs higher brightness than the peripheral area; the left and right parallel partitions relate to a central area, brightness is required to be improved uniformly to meet the requirement of display of the highest brightness area, the brightness of the edge area can be properly reduced under the condition that a user watches the display screen without being influenced by the square-shaped partitions, and only the central area is adjusted to be normal brightness, so that the display screen is more energy-saving.
Optionally, the first light source assembly 121 may also emit light in a single side, that is, only emit light in the first direction, and enter the first light guide plate, so as to save energy consumption.
The second light source assembly 122 is not disposed around the second light guide plate 112, but disposed only at two sides of the second light guide plate 112; the other side employs a reflective structure 101. Specifically, the second light guide plate 112 includes a first edge 113, a second edge 114, a third edge 115, and a fourth edge 116; the length of the first side 113 is equal to the length of the third side 115, and the length of the second side 114 is equal to the length of the fourth side 116; the first side 113 and the third side 115 are arranged in parallel, and the second side 114 and the fourth side 116 are arranged in parallel; the length of the first side 113 and the third side 115 is greater than the length of the second side 114 and the fourth side 116; the first side 113 and the third side 115 are arranged perpendicular to the second side 114 and the fourth side 116 in parallel; the second light source assembly 122 is respectively disposed corresponding to the first side 113 and the third side 115, and the reflective structure 101 includes a first reflective structure 117 and a second reflective structure 118 respectively disposed corresponding to the second side 114 and the fourth side 116. Specifically, the first reflective structure 117 and the second reflective structure 118 are reflective sheets or reflective coatings; the two long sides are provided with the second light source assembly 122, the short sides are provided with the reflectors, and the brightness of the second light guide plate 112 is controlled by the two long-side light sources; then the reflector plate reflects, so that the brightness of the second light guide plate 112 is controlled, meanwhile, the brightness adjustment on two sides is reduced, the cost is reduced, the edge of most pictures is dark, the brightness requirement is not high, and the lamp sources on two sides and the reflector plates on two sides can also meet the edge requirement of the display panel, thereby saving energy.
Optionally, as shown in fig. 3, the second light source assembly 122 is disposed corresponding to any one side of the second light guide plate 112, and specifically, may be disposed on the third side 115 of the second light guide plate 112, and the process is simple, and has high controllability on edge brightness, the third side 115 is a long side, and the light-emitting area of the edge brightness is larger than that of the short side, so that the uniformity of the edge brightness of the display panel is higher.
Optionally, as shown in fig. 4, the second light source assembly 122 is disposed around the periphery of the second light guide plate 112, so that the brightness of each position of the light guide plate is more uniform, which is beneficial to improving the display quality.
As shown in fig. 5, unlike the previous embodiment, the second light guide plates 112 respectively include a plurality of sub light guide plates, the second light guide plates 112 include a plurality of sub light guide plates, and the plurality of sub light guide plates are respectively disposed at the second corner regions 150; specifically, the second light guide plate 112 includes a first sub light guide plate 160, a second sub light guide plate 170, a third sub light guide plate 180, and a fourth sub light guide plate 190; the first sub light guide plate 160, the second sub light guide plate 170, the third sub light guide plate 180, and the fourth sub light guide plate 190 are respectively disposed at the second corner regions 150 of the second light guide plate 112; the second light source assembly 122 is respectively disposed at the first sub light guide plate 160, the second sub light guide plate 170, the third sub light guide plate 180, and the fourth sub light guide plate 190, and respectively enters the first sub light guide plate 160, the second sub light guide plate 170, the third sub light guide plate 180, and the fourth sub light guide plate 190, because the light source at the corner region of the peripheral light guide plate is weak and the brightness is uncontrollable, the present solution divides the corner region of the peripheral light guide plate into four sub light guide plates, and the second light source assembly 122 is disposed corresponding to the quadrangular sub light guide plate, therefore, the corner region of the peripheral light guide plate can be individually controlled, and the light source intensity at the corner region is enhanced.
Specifically, the second light source assembly 122 is respectively disposed on any one side of the first sub light guide plate 160, the second sub light guide plate 170, the third sub light guide plate 180, and the fourth sub light guide plate 190; the other edges of the first sub light guide plate 160, the second sub light guide plate 170, the third sub light guide plate 180, and the fourth sub light guide plate 190 are provided with a third reflective structure 119, and the third reflective structure 119 is: the reflective sheet or the reflective coating controls the brightness of the second light guide plate 112 such that the brightness of the four corner regions is more saturated.
Specifically, each of the sub light guide plates includes a plurality of long sides and short sides; the second light source assemblies 122 are respectively and correspondingly disposed at the long sides of the sub light guide plates, close to the edge of the second light guide plate 112; in this scheme, the second light source assembly 122 can be disposed at the longest edge of the sub-light guide plate near the edge of the second light guide plate 112, and disposed at the longest edge of the corner, so that the coverage rate is high, the process is simple, and the edge corner region is controllable due to the disposition of the second light source assembly on the long edge, which is unlikely to cause too dark display in a small number of pictures, thereby improving the display effect.
Optionally, the second light source assembly may also be disposed around an edge of each sub light guide plate; and the two sides of the second light source component corresponding to the side of the sub light guide plate contacted with other light guide plates emit light. The first light source assembly is arranged around the periphery of the first light guide plate; the first light source assembly emits light along the inner direction and the peripheral direction of the backlight module respectively and emits light into the first light guide plate and the second light guide plate respectively. Therefore, the parts corresponding to the four sides of the second light guide plate are also irradiated by the light sources, so that the side display is prevented from being dark, the number of the light sources can be effectively controlled, and the cost is prevented from being increased.
As shown in fig. 6, in another embodiment, the first light source assembly 112 and the second light source assembly 122 are both disposed at the periphery of the first light guide plate, and the first light source assembly emits light along the inner direction of the backlight module and enters the first light guide plate; the second light source assembly 122 emits light into the second light guide plate along the external direction of the backlight module.
Further, the first light guide plate 111 includes four first corner regions 130 and side regions 140; the four first corner regions 130 are arc structures; the first and second light source assemblies 121 and 122 are disposed along the first corner region 130 and the side region 140 of the first light guide plate 111,
the first light source assembly 121 and the second light source assembly 122 corresponding to the first corner region 130 emit light in a first direction and a second direction, respectively, and enter the first light guide plate 111 and the second light guide plate 112; the first light source assembly 121 and the second light source assembly 122 corresponding to the side edge region 140 emit light in a first direction and a second direction, respectively, and enter the first light guide plate 111 and the second light guide plate 112, respectively; the brightness of the side regions 140 corresponding to the first and second light source assemblies 121 and 122 is independently controlled from the brightness of the first corner regions 130 corresponding to the first and second light source assemblies 121 and 122.
In this scheme, the independent control is adopted corresponding to the uncontrollable corner region of the second light guide plate 112, the side region 140 controls the brightness of the first light guide plate 111, and the corner region at the edge of the display picture can be controlled at the arc position, so that the dark dead angle caused by the fact that the corner region of the second light guide plate 112 is far away from the light source is avoided, and the overall brightness of the second light guide plate 112 is more uniform.
The technical solution of the present application can be widely applied to various display panels, such as TN (Twisted Nematic) display panel, IPS (In-Plane Switching) display panel, VA (Vertical Alignment) display panel, MVA (Multi-Domain Vertical Alignment) display panel, and of course, other types of display panels, such as OLED (Organic Light-Emitting Diode) display panel, and the above solution can be applied thereto.
The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (10)
1. A backlight module, comprising:
a back plate;
a light guide plate disposed on the back plate; comprises a first light guide plate and a second light guide plate; and
a light source assembly comprising a first light source assembly and a second light source assembly,
wherein the second light guide plate is disposed around the first light guide plate;
the first light source assembly provides a light source for the first light guide plate;
the second light source assembly provides a light source for the second light guide plate;
the brightness of the first light source assembly and the brightness of the second light source assembly are respectively and independently controlled.
2. The backlight module as claimed in claim 1, wherein the first light source assembly is disposed at the periphery of the first light guide plate; the second light source assembly is arranged at the periphery of the second light guide plate; the first light source assembly emits light along the inner direction and the peripheral direction of the backlight module respectively and emits light into the first light guide plate and the second light guide plate respectively; and the second light source component emits light along the internal direction of the backlight module and emits the light into the second light guide plate.
3. The backlight module as claimed in claim 2, wherein the first light source module is disposed around the periphery of the first light guide plate; the second light source assembly is arranged around the periphery of the second light guide plate.
4. The backlight module as claimed in claim 2, wherein the first light source module is disposed around the periphery of the first light guide plate; correspondingly arranged on any one or more sides of the second light guide plate; and a reflecting structure is arranged at the edge of the second light guide plate, which is not provided with the second light source component.
5. The backlight module as claimed in claim 1, wherein the first light source assembly is disposed at the periphery of the first light guide plate; the second light source assembly is arranged at the periphery of the second light guide plate; the first light source assembly and the second light source assembly emit light along the inner direction of the backlight module and respectively enter the first light guide plate and the second light guide plate.
6. The backlight module as claimed in claim 1, wherein the first and second light source modules are disposed at the periphery of the first light guide plate, and emit light along the inner direction of the backlight module into the first light guide plate; and the second light source component emits light along the external direction of the backlight module and emits the light into the second light guide plate.
7. The backlight module as claimed in claim 6, wherein the first light guide plate includes four first corner regions and side regions; the four first corner areas are of circular arc structures;
the first corner area is positioned at four corner positions of the first light guide plate, and the side area is positioned at an edge position of the first light guide plate;
the first light source component and the second light source component are correspondingly arranged along the four first corner areas and the four side areas in a surrounding mode.
8. The backlight module as claimed in claim 1, wherein the second light guide plate includes four second corner regions at four corners of the second light guide plate;
the second light guide plate comprises a plurality of sub light guide plates, and the second light source assembly is arranged at the edge of the sub light guide plates;
the first light source assembly is arranged around the periphery of the first light guide plate; the first light source assembly emits light along the inner direction and the peripheral direction of the backlight module respectively and emits light into the first light guide plate and the second light guide plate respectively.
9. The backlight module as claimed in claim 8, wherein the second light source module is disposed at a long side of each of the sub light guide plates; and a reflection structure is arranged on the short side of the sub light guide plate.
10. A display device comprising the backlight module as claimed in any one of claims 1 to 9 and a display panel.
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| CN202022748511.5U CN214174776U (en) | 2020-11-24 | 2020-11-24 | Backlight module and display device |
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| CN202022748511.5U CN214174776U (en) | 2020-11-24 | 2020-11-24 | Backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114967229A (en) * | 2022-04-29 | 2022-08-30 | 上海天马微电子有限公司 | Light source panel, direct type backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114967229A (en) * | 2022-04-29 | 2022-08-30 | 上海天马微电子有限公司 | Light source panel, direct type backlight module and display device |
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