CN213601017U - Side income formula mixes backlight unit that subregion was adjusted luminance with straight following formula - Google Patents
Side income formula mixes backlight unit that subregion was adjusted luminance with straight following formula Download PDFInfo
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- CN213601017U CN213601017U CN202022430783.0U CN202022430783U CN213601017U CN 213601017 U CN213601017 U CN 213601017U CN 202022430783 U CN202022430783 U CN 202022430783U CN 213601017 U CN213601017 U CN 213601017U
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Abstract
The utility model discloses a side-in and direct-down type mixed partitioned dimming backlight module, which comprises a reflecting layer, a semi-permeable reflecting layer and a light guide plate which are arranged in sequence from a light emitting side to a light emitting side, wherein the light incident side surface of the light guide plate is provided with uniformly distributed salient dots; a direct type LED light source group consisting of a plurality of LED light sources is arranged between the semi-transparent reflecting layer and the reflecting layer, and each LED light source is independently controlled by a control system to be turned on and off; and a lateral LED light source group is arranged on the outer side of the light guide plate and is controlled to be turned on and off by a control system. The utility model discloses whole backlight unit simple structure and good reliability.
Description
Technical Field
The utility model relates to a backlight unit technical field, especially a backlight unit that side income formula and straight following formula mix subregion and adjust luminance.
Background
The current backlight modules are mainly divided into side-in type backlight modules and direct type backlight modules. The side-in backlight is a backlight formed by arranging linear or point-shaped light sources at the side edge of a specially designed light guide plate. The light guide plate principle is that the interference phenomenon of light is destroyed by utilizing the mesh point distribution (pattern) at the bottom of the light guide acrylic Plate (PMMA), a line light source is uniformly converted into a surface light source, the light guide plate has the function of guiding the scattering direction of light, the light distribution is more uniform, the shadow of a reflection point cannot be seen from the front side, the brightness of the panel is improved, the uniformity of the brightness of the panel is ensured, the good performance of the light guide plate has great influence on backlight, and the light guide plate can be made into a double-side type, a three-side type or even a four-side type according to the actual use requirement. The side-in backlight can be thin, but the backlight has low light utilization rate, and the thinner the backlight is, the smaller the utilization rate is. When the side-light type LED backlight source is applied to the LCDs with medium and large sizes, the weight and the cost of the light guide plate can be increased along with the increase of the sizes, the luminous brightness and the uniformity are not ideal, meanwhile, the side-light type LED backlight liquid crystal television can only realize simple one-dimensional dimming because the light guide plate is adopted, and the direct type LED backlight source is good in performance and can realize the area dynamic control of the liquid crystal television. The direct type backlight source process is relatively simple, a light guide plate is not needed, a light source (an LED wafer array) and a PCB (printed circuit board) are arranged at the bottom of the backlight source, and light rays are uniformly emitted from LEDs, pass through a reflector plate at the bottom and then pass through a diffusion plate and a brightness enhancement film on the surface. The thickness of the backlight is mainly determined by the height of the cavity between the reflecting film and the scattering plate. However, there is no backlight module based on the side-entry and direct-down mixed zone dimming.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, a backlight unit that side income formula and straight following formula mix the subregion and adjust luminance is provided.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a backlight module for side-in and direct-down mixed zone dimming comprises a reflecting layer, a semi-permeable reflecting layer and a light guide plate which are sequentially arranged from a light emitting side to a light emitting side, wherein protruded mesh points which are uniformly distributed are arranged on the light incident side surface of the light guide plate; a direct type LED light source group consisting of a plurality of LED light sources is arranged between the semi-transparent reflecting layer and the reflecting layer, and each LED light source is independently controlled by a control system to be turned on and off; and a lateral LED light source group is arranged on the outer side of the light guide plate and is controlled to be turned on and off by a control system.
In the technical scheme, the control system comprises a power supply module, a control module and a driving module, the power supply module is used for converting a power supply into a voltage transformation and outputting the voltage transformation and outputting a working voltage for supplying power to the direct type LED light source group and the side type LED light source group, the control module is used for outputting a driving instruction for the direct type LED light source group and the side type LED light source group according to the control instruction, and the driving module is used for driving the direct type LED light source group and the side type LED light source group to be wholly or partially turned on or turned off according to the driving instruction.
In the above technical solution, the salient dots are spherical dots.
In the above technical solution, the direct type LED light source group includes a plurality of interval LED light source groups composed of a plurality of LED light sources.
The utility model has the advantages that: the side-entrance and direct-down type mixed partition dimming backlight module comprises a reflecting layer, a semi-permeable reflecting layer and a light guide plate which are sequentially arranged from a light emitting side to a light emitting side, wherein protruded mesh points which are uniformly distributed are arranged on the light incident side surface of the light guide plate; a direct type LED light source group consisting of a plurality of LED light sources is arranged between the semi-transparent reflecting layer and the reflecting layer, and each LED light source is independently controlled by a control system to be turned on and off; and a lateral LED light source group is arranged on the outer side of the light guide plate and is controlled to be turned on and off by a control system. The whole backlight module has simple structure and strong reliability.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of the control system of the present invention.
Fig. 3 is a schematic diagram of the control method of the present invention.
In the figure, 1, a reflective layer; 2. a transflective layer; 3. a light guide plate; 4. highlighting the mesh points; 5. a direct type LED light source group; 6. side income formula LED light source group.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
As shown in fig. 1-3, a side-in and direct-down type mixed zoned dimming backlight module includes a reflective layer 1, a transflective layer 2, and a light guide plate 3 sequentially disposed from a light emitting side to a light emitting side, wherein a light incident side surface of the light guide plate 3 is provided with uniformly distributed protruding dots 4; a direct type LED light source group 5 consisting of a plurality of LED light sources is arranged between the semi-transparent reflecting layer 2 and the reflecting layer 1, and each LED light source is independently controlled by a control system to be turned on and off; the lateral entering type LED light source group 6 is arranged on the outer side of the light guide plate 3, and the lateral entering type LED light source group 6 is controlled by the control system to be turned on and off.
In some embodiments, the control system includes a power module, a control module, and a driving module, the power module is configured to transform and output a power source into a working voltage for powering the direct type LED light source group 5 and the side type LED light source group 6, the control module is configured to output a driving instruction for the direct type LED light source group 5 and the side type LED light source group 6 according to the control instruction, and the driving module is configured to drive the direct type LED light source group 5 and the side type LED light source group 6 to turn on or turn off wholly or partially according to the driving instruction. The power module may be a voltage drop chip. The control module can adopt a singlechip. The driving module can adopt MOS tubes.
In some embodiments, the protruding dots 4 are spherical dots with a diameter distribution of 250 μm to 1250 μm and a dot minimum gap of 0.11 mm. The mesh points may be formed integrally with the light guide plate 3 or by printing.
In some embodiments, the direct-type LED light source group 5 includes a plurality of interval LED light source groups composed of several LED light sources. The LED light sources at the edge of the light guide plate 3 form a side LED light source group similar to the lateral entering LED light source group 6, and local dimming can be realized.
A control method of a backlight module with side-entry and direct-down mixed zone dimming comprises the following control steps:
step 1: the control system acquires a control instruction of the upper computer and converts the control instruction into a driving instruction;
step 2: the driving instructions comprise interval LED light source group dimming instructions, side-entering type LED light source group 6 dimming instructions and direct type LED light source group 5 dimming instructions; the control system drives the side-entering type LED light source group 6 and/or the direct type LED light source group 5 to perform dimming according to the dimming instruction.
The side-in backlight belongs to a linear light source, is mainly partitioned in one direction according to the linear light source at present to realize the partitioned light control of an area in one direction (1D), and the direct type backlight belongs to a planar distribution light source, realizes the partitioning in the X/Y direction through LEDs in X/Y distribution, and realizes the partitioned light control of an area in the X/Y direction (2D); the direct type backlight with the Local dimming function has a better Local light control effect than the lateral type backlight, and the direct type backlight can achieve high brightness, a commonly used HDR scene and a scene with high fine image quality.
The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a backlight unit that side income formula and straight following formula mix subregion and adjust luminance which characterized in that: the LED display screen comprises a reflecting layer, a semi-permeable reflecting layer and a light guide plate which are sequentially arranged from a light emitting side to a light emitting side, wherein protruded mesh points which are uniformly distributed are arranged on the light incident side surface of the light guide plate; a direct type LED light source group consisting of a plurality of LED light sources is arranged between the semi-transparent reflecting layer and the reflecting layer, and each LED light source is independently controlled by a control system to be turned on and off; and a lateral LED light source group is arranged on the outer side of the light guide plate and is controlled to be turned on and off by a control system.
2. The backlight module with side-lit and direct-lit hybrid zone dimming as claimed in claim 1, wherein: the control system comprises a power supply module, a control module and a driving module, wherein the power supply module is used for converting a power supply into a working voltage for supplying power to the direct type LED light source group and the side type LED light source group, the control module is used for outputting a driving instruction for the direct type LED light source group and the side type LED light source group according to the control instruction, and the driving module is used for driving the direct type LED light source group and the side type LED light source group to be wholly or partially turned on or turned off according to the driving instruction.
3. The backlight module with side-lit and direct-lit hybrid zone dimming as claimed in claim 1, wherein: the salient mesh points are spherical mesh points.
4. The backlight module with side-lit and direct-lit hybrid zone dimming as claimed in claim 1, wherein: the direct type LED light source group comprises a plurality of interval LED light source groups consisting of a plurality of LED light sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022430783.0U CN213601017U (en) | 2020-10-28 | 2020-10-28 | Side income formula mixes backlight unit that subregion was adjusted luminance with straight following formula |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022430783.0U CN213601017U (en) | 2020-10-28 | 2020-10-28 | Side income formula mixes backlight unit that subregion was adjusted luminance with straight following formula |
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| CN213601017U true CN213601017U (en) | 2021-07-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114660852A (en) * | 2022-05-25 | 2022-06-24 | 南京惠华电子技术有限公司 | Novel backlight assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114660852A (en) * | 2022-05-25 | 2022-06-24 | 南京惠华电子技术有限公司 | Novel backlight assembly |
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