CN110441904B - Dot distribution design method of reflector plate - Google Patents
Dot distribution design method of reflector plate Download PDFInfo
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- CN110441904B CN110441904B CN201910628385.9A CN201910628385A CN110441904B CN 110441904 B CN110441904 B CN 110441904B CN 201910628385 A CN201910628385 A CN 201910628385A CN 110441904 B CN110441904 B CN 110441904B
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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Abstract
The invention relates to a dot distribution design method of a reflector plate, and relates to the technical field of backlight modules. The mesh point distribution design method of the reflector plate comprises the following steps: (1) manufacturing a plurality of types of public version dot reflectors, wherein the dots on the public version dot reflectors of each type are arranged in a staggered array; (2) attaching corresponding public plate dot reflectors to different positions of the inclined surface part of the reflector plate to enable the brightness of the inclined surface part of the reflector plate to be consistent, and taking the dot distribution as the required dot distribution on the reflector plate; (3) and confirming the density value of each row of the required dot distribution, and designing a dot drawing consistent with the required dot distribution in an array in a CAD according to the dot density value distribution to serve as the dot distribution design of the first version reflector. The dot distribution design method of the reflector plate can improve the accuracy, the plate fixing speed and the development efficiency of the screen printing dot design of the reflector plate, and is convenient to design and low in cost.
Description
Technical Field
The invention relates to the technical field of backlight modules, in particular to a dot distribution design method of a reflector plate.
Background
In the direct type backlight module design, the problem of uneven bright and dark edges generally exists, especially in a back plate cavity with a light mixing distance smaller than 22 mm. As shown in fig. 1, the backlight module includes a reflector 2 disposed on a back plate 1, the back plate includes a bottom surface and an inclined surface, the reflector 2 includes a flat plate portion 21 and an inclined surface portion 22, the LED beads 3 are distributed on the flat plate portion 21 of the reflector 2, and a diffuser 4 covers the back plate 1 and forms a cavity with the back plate. The LED lamp beads are positioned near the joint position of the flat plate part of the reflector plate and the inclined plane part, the emitted light rays are refracted and diffused through the reflective lens 5, part of the light rays can strike the inclined plane part of the reflector plate and then are refracted into the diffusion plate, and if the LED lamp beads are arranged at the distance from the bottom edge of the inclined plane part, the problem of uneven brightness can be caused due to the angle design reason of the inclined plane part of the reflector plate, the material selection reason of the reflector plate, the distance arrangement reason of the LED lamp beads from the bottom edge of the inclined plane part and the like.
In order to solve the problem, the prior art uses a screen printing method to print light-absorbing black or gray ink on a reflector, and adjusts brightness and darkness through the variation of the density degree of the dots, so the design of the density of the dots is the core technology of the solution. Under the condition of no help of professional dot design software (such as Gtools or BLdots Image2Dots), engineers can only screen or coat ink on a reflector for many times, which not only easily causes inaccuracy on the simulation of the Dots, but also can fix the plate only by continuous trial and modification due to the fact that the plate needs to be changed for many times, and the development efficiency and the development process are seriously influenced; even if the dot design software is adopted, because the dot distribution designed by the software is a theoretical value and is inaccurate, the dot distribution is required to be corrected according to the actual condition after being printed by a first edition, and then the edition is fixed after being corrected for many times, the efficiency is not improved much, and the cost of the original edition software is higher, so the dot cost performance is not high by adopting the software design.
Disclosure of Invention
Based on this, the invention aims to provide a method for designing the dot distribution of a reflector plate, which can improve the accuracy, the plate fixing speed and the development efficiency of the screen dot design of the reflector plate, and has the advantages of convenient design and low cost.
The invention is realized by the following technical scheme:
a dot distribution design method of a reflector plate is characterized by comprising the following steps:
(1) the method comprises the following steps of manufacturing a plurality of patterns of public edition dot reflectors, arranging dots on the public edition dot reflectors of each pattern in a staggered array mode, setting the distance between adjacent dots in the horizontal direction as Px, setting the distance between adjacent dots in the vertical direction as Py, setting the radius of each dot as r, setting the dot Px and r of each line to be constant, setting Py in each pattern to be constant, setting the dot density of each line as MD, and enabling the MD to accord with the following approximate relation:
(2) attaching corresponding public plate dot reflectors to different positions of the inclined surface part of the reflector plate to enable the brightness of the inclined surface part of the reflector plate to be consistent, and taking the dot distribution as the required dot distribution on the reflector plate;
(3) and confirming the density value of each row of the required dot distribution, and designing a dot drawing consistent with the required dot distribution in an array in a CAD according to the dot density value distribution to serve as the dot distribution design of the first version reflector.
The public plate dot reflector is obtained by manufacturing, the public plate dot reflector is only needed to be pasted on the inclined plane part of the reflector for simulation, and the distribution design of the dots can be ensured to be carried out according to the density value distribution of the dots according to the consistent brightness obtained by simulation.
Further, the specific steps of (2) are as follows:
the common-plate dot reflectors of different patterns are cut and attached to the inclined surface parts of the reflectors respectively, and the brightness of different positions after the common-plate dot reflectors are attached is judged to determine whether a certain pattern is suitable:
firstly, after a certain pattern of public edition dot reflector is attached, the brightness of different positions is consistent, and then the dot distribution on the public edition dot reflector of the pattern is used as the dot distribution required on the reflector;
after the public plate dot reflecting sheet in any pattern is attached, the brightness of different positions is inconsistent, the pattern with the minimum brightness difference of different positions is used as a main pattern, the area with the brightness inconsistent with the periphery is set as B, the rest areas are set as A, the public plate dots covered on the B area are cut off, then a part of the public plate dot reflecting sheet in another pattern is cut and attached to the B area on the reflecting sheet until the brightness of the B area is consistent with that of the A area, the attached public plate dot reflecting sheet in the same brightness is used as a secondary pattern, and the dot distribution formed by combining the main pattern and the secondary pattern is used as the required dot distribution on the reflecting sheet.
The reflecting sheet in the public plate mesh point reflecting sheet can be made of reflecting paper, so that the public plate mesh point reflecting sheet is more convenient to use, and tiny errors caused by the fact that the public plate mesh point reflecting sheet is attached to the reflecting sheet can be reduced; in the second step, in order to make the brightness of different positions consistent, different public plate dot reflectors can be tried continuously, or areas with inconsistent brightness can be repeatedly cut out, and the next public plate dot reflector is cut and attached, i.e. a plurality of secondary patterns can be provided.
Preferably, in the public plate dot reflecting sheet of each pattern, Px ═ Py.
Further preferably, Px of each primary pattern and its corresponding secondary pattern are equal. Thus, when the dot density value is subsequently confirmed, since Px is Py and is a constant value, the dot density value MD and the dot radius r2In direct proportion, the purpose of designing or adjusting the density value of the dots can be achieved only by designing or adjusting the dot radius of each line, and the dot drawing is more convenient to design.
Further, the plurality of patterns of the public format dot reflector sheet include a base pattern and an auxiliary pattern, the primary pattern is selected from the base pattern, and the secondary pattern is selected from the auxiliary pattern. The design of the basic pattern and the auxiliary pattern of the public plate dot reflector can improve the plate fixing efficiency.
Preferably, according to the position of the bright spot on the inclined plane part of the reflector plate irradiated by the lamp bead in the backlight module, the tangent position of the farthest position of the bright spot in the vertical direction is determined as the brightest position, the lowest end of the inclined plane part of the reflector plate is used as the starting position, the highest end of the inclined plane part of the reflector plate is used as the ending position, and the public plate dot reflector plate of the basic pattern is set from the starting position to the brightest position and then to the ending position according to the trend that the dot density is gradually decreased from small to large to small. By identifying the brightest part, the change trend of the dot density value from the beginning to the end can be known more quickly, and the selection of the main pattern and the selection of the secondary pattern play a role in improving efficiency.
Further, the method for designing the dot distribution of the reflector plate is characterized by further comprising the following steps:
(4) printing on the inclined plane part of the reflector plate according to the dot distribution design of the first reflector plate, observing the overall brightness, reducing the dot density of a dark area, increasing the dot density of a bright area, and designing a dot drawing in an array in a CAD according to the adjusted density value distribution to form the dot distribution design of the modified reflector plate.
Further, the method also comprises the following steps: printing on the inclined plane part of the reflector plate according to the modified reflector plate mesh point distribution design, repeating the processing step of the step (4) after judging the brightness, and obtaining the final reflector plate mesh point distribution design after a plurality of times of modification.
Further, the judgment method of the brightness is visual measurement or measurement by a brightness measuring instrument.
Further, the brightness consistency means that the brightness consistency is visually observed or the numerical difference of a brightness measuring instrument is not more than 30%.
The mesh point distribution design method of the reflector plate has the following beneficial effects:
according to the dot distribution design method, the public plate dot reflector can be manufactured in advance, each time dot distribution timing is carried out, only the public plate dot reflector needs to be attached to the inclined plane part of the reflector for simulation, dot distribution design obtained by simulation when the brightness is consistent serves as required dot distribution design, and dot drawings can be designed in an array in CAD by recording dot density value distribution. Because the dot distribution is obtained by simulation practice, the dot distribution design of the first version reflector plate is very accurate, the subsequent adjustment may be only needed, the number of times of plate changing is small, the plate fixing speed and the development efficiency are effectively improved, and the design is convenient and the cost is low.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a partial structure of a backlight module;
FIG. 2 is a schematic diagram of a portion of dots in a dot distribution;
FIG. 3 is a partial schematic view of a base version one of an embodiment of example 1;
fig. 4 is a partial schematic view of an auxiliary pattern three of one embodiment in example 1;
FIG. 5 is a schematic top view of the reflection sheet after the diffusion plate of the backlight module with screen printed with partial dots is removed;
fig. 6 is an enlarged schematic view of a portion G of fig. 5;
wherein: 1-backboard, 2-reflector plate, 21-flat plate part, 22-inclined plane part, 3-LED lamp bead, 4-diffuser plate and 5-reflective lens.
Detailed Description
As shown in fig. 1, the backlight module includes a reflector 2 disposed on a back plate 1, the back plate includes a bottom surface and an inclined surface, the reflector 2 includes a flat plate portion 21 and an inclined surface portion 22, the LED beads 3 are distributed on the flat plate portion 21 of the reflector 2, and a diffuser 4 covers the back plate 1 and forms a cavity with the back plate. The light that LED lamp pearl 3 sent passes through the refraction and the diffusion effect of reflective lens 5, and partial light can be beaten on the inclined plane part of reflector plate.
Example 1
The mesh point distribution design method of the reflector plate of the embodiment comprises the following steps:
(1) making a plurality of patterns of public edition dot reflectors, wherein dots on the public edition dot reflectors of each pattern are arranged in a staggered array, as shown in fig. 2, the distance between adjacent dots in the horizontal direction is set as Px, the distance between adjacent dots in the vertical direction is set as Py, the radius of each dot is set as r, the dots Px and r in each row are all fixed, Py in each pattern is fixed, for the dots in each row, the dot density is set as MD, and MD conforms to the following approximate relationship:
(2) attaching corresponding public plate dot reflectors to different positions of the inclined surface part of the reflector plate to enable the brightness of the inclined surface part of the reflector plate to be consistent, and taking the dot distribution as the required dot distribution on the reflector plate;
(3) and confirming the density value of each row of the required dot distribution, and designing a dot drawing consistent with the required dot distribution in an array in a CAD according to the dot density value distribution to serve as the dot distribution design of the first version reflector.
As an embodiment, the specific steps of (2) may be: the common-plate dot reflectors of different patterns are cut and attached to the inclined surface parts of the reflectors respectively, and the brightness of different positions after the common-plate dot reflectors are attached is judged to determine whether a certain pattern is suitable: firstly, after a certain pattern of public edition dot reflector is attached, the brightness of different positions is consistent, and then the dot distribution on the public edition dot reflector of the pattern is used as the dot distribution required on the reflector; after the public plate dot reflecting sheet in any pattern is attached, the brightness of different positions is inconsistent, the pattern with the minimum brightness difference of different positions is used as a main pattern, the area with the brightness inconsistent with the periphery is set as B, the rest areas are set as A, the public plate dots covered on the B area are cut off, then a part of the public plate dot reflecting sheet in another pattern is cut and attached to the B area on the reflecting sheet until the brightness of the B area is consistent with that of the A area, the attached public plate dot reflecting sheet in the same brightness is used as a secondary pattern, and the dot distribution formed by combining the main pattern and the secondary pattern is used as the required dot distribution on the reflecting sheet. The reflecting sheet in the public plate mesh point reflecting sheet can be made of reflecting paper, so that the public plate mesh point reflecting sheet is more convenient to use, and tiny errors caused by the fact that the public plate mesh point reflecting sheet is attached to the reflecting sheet can be reduced; in the second step, in order to make the brightness of different positions consistent, different public plate dot reflectors can be tried continuously, or areas with inconsistent brightness can be repeatedly cut out, and the next public plate dot reflector is cut and attached, i.e. a plurality of secondary patterns can be provided.
In a preferred embodiment, in the public plate dot reflecting sheet of each pattern, Px is Py, and each main pattern is equal to Px of its corresponding sub pattern. Thus, when the dot density value is subsequently confirmed, since Px is Py and is a constant value, the dot density value MD and the dot radius r2In direct proportion, the purpose of designing or adjusting the density value of the dots can be achieved only by designing or adjusting the radius of the dots in each row, and the efficiency of designing the dot drawings is improved more conveniently.
As an embodiment, the plurality of patterns of the public dot reflecting sheet includes a base pattern and an auxiliary pattern, the primary pattern is selected from the base pattern, and the secondary pattern is selected from the auxiliary pattern. The design of the basic pattern and the auxiliary pattern of the public plate dot reflector can improve the plate fixing efficiency.
For example: as a specific embodiment, the public plate dot reflecting sheet may include the following patterns:
base pattern one (see fig. 3), Px and Py both equal 3.2mm, dot diameter increased gradually from 1.2mm to 2.3mm, dot by dot diameter increased 0.05mm, corresponding to a gradual increase in density change from 11.04% to 40.57%.
In the second basic mode, Px and Py are equal to 4.0mm, the mesh point diameter is gradually increased from 0.8mm to 2.6mm, the mesh point diameter in row is increased by 0.1mm, and the corresponding density change is gradually increased from 3.14% to 33.18%.
And the auxiliary pattern III (shown in figure 4), wherein Px and Py are equal to 3.2mm, the dot diameter is gradually increased from 0.8mm to 2.4mm, the dot diameter of the first three rows is equal to 0.8mm, the dot diameter of every third row is increased by 0.2mm, and the corresponding density change is gradually increased from 4.91% to 44.18%.
And the auxiliary pattern IV is that Px and Py are equal to 4.0mm, the mesh point diameter is gradually increased from 0.8mm to 2.6mm, the mesh point diameters of the first three rows are equal to 0.8mm, the mesh point diameters of every three rows are increased by 0.2mm, and the corresponding density change is gradually increased from 3.14% to 33.18%.
In other embodiments, Px and Py may be equal or different, or may take other values, and the change of the dot diameter may also be designed as needed, which is not described herein for example.
According to the preferred embodiment, according to the position of the bright spot irradiated on the inclined plane part of the reflector plate by the lamp bead in the backlight module, the tangential position of the farthest position of the bright spot in the vertical direction is determined as a brightest part B1, the lowest end of the inclined plane part of the reflector plate is taken as a starting part A1, the highest end of the inclined plane part of the reflector plate is taken as an ending part C1, a straight line which passes through the LED lamp bead and is vertical to the A1, the B1 and the C1 is taken as M1, and the public plate dot reflector plate of the basic pattern is arranged from the starting part A1 to the brightest part B1 to the ending part C1 according to the trend that the dot density is gradually increased from small to large to small. For example, for a certain model, according to experience, a tangent position at a junction of a reflector and a lamp bead with a radius of 50-60 mm may be directly used as a brightest point B1, as shown in fig. 5 and 6. By determining the brightest part, the change trend of the density value of the halftone dot from the beginning to the end can be known more quickly, and the selection of the main pattern and the selection of the secondary pattern play a role in improving efficiency.
As a preferred embodiment, the method for designing the dot distribution of the reflective sheet may further include the following steps:
(4) printing on the inclined plane part of the reflector plate according to the dot distribution design of the first reflector plate, observing the overall brightness, reducing the dot density of a dark area, increasing the dot density of a bright area, and designing a dot drawing in an array in a CAD according to the adjusted density value distribution to form the dot distribution design of the modified reflector plate. For example, as shown in fig. 6, a straight line M2 may be drawn at the intersection of the bright spots on the inclined surface portion of the reflector plate irradiated by two adjacent lamp beads, and since the brightness at the position near M2 (compared with the brightness at the position near M1) is relatively dark, the dot density near M2 may be adjusted to be more sparse. For another example, since the brightness of the upper corner of the inclined surface of the reflective sheet is darker, the dot density may be adjusted such that the Px at the top and bottom sides (vertical direction) is +0.5mm closer to the edge corner, and the Py at the left and right sides is +0.5mm closer to the edge corner.
Further, the method can also comprise the following steps: printing on the inclined plane part of the reflector plate according to the modified reflector plate mesh point distribution design, repeating the processing step of the step (4) after judging the brightness, and obtaining the final reflector plate mesh point distribution design after a plurality of times of modification.
As an embodiment, the brightness determination method may be selected from visual measurement or measurement by a brightness measuring instrument. Wherein, the brightness consistency means that the visual brightness consistency or the numerical difference of the brightness measuring instrument is not more than 30%.
By the method for designing the distribution of the dots of the reflector plate, the dots of the first-version reflector plate can be accurately distributed according to the simulation practice of the public-version dot reflector plate on the inclined plane part of the reflector plate, so that the plate fixing speed and the development efficiency are effectively improved, the design is convenient, and the cost is low.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships that are based on the description of the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. A dot distribution design method of a reflector plate is characterized by comprising the following steps:
(1) the method comprises the following steps of manufacturing a plurality of patterns of public edition dot reflectors, arranging dots on the public edition dot reflectors of each pattern in a staggered array mode, setting the distance between adjacent dots in the horizontal direction as Px, setting the distance between adjacent dots in the vertical direction as Py, setting the radius of each dot as r, setting the dot Px and r of each line to be constant, setting Py in each pattern to be constant, setting the dot density of each line as MD, and enabling the MD to accord with the following approximate relation:
(2) attaching corresponding public plate dot reflectors to different positions of the inclined surface part of the reflector plate to enable the brightness of the inclined surface part of the reflector plate to be consistent at different positions, and taking the dot distribution as the required dot distribution on the reflector plate, wherein the method comprises the following specific steps:
the common-plate dot reflectors of different patterns are cut and attached to the inclined surface parts of the reflectors respectively, and the brightness of different positions after the common-plate dot reflectors are attached is judged to determine whether a certain pattern is suitable:
firstly, after a certain pattern of public edition dot reflector is attached, the brightness of different positions is consistent, and then the dot distribution on the public edition dot reflector of the pattern is used as the dot distribution required on the reflector;
after the public plate dot reflecting sheet in any pattern is attached, the brightness of different positions is inconsistent, the pattern with the minimum brightness difference of different positions is used as a main pattern, the area with the brightness inconsistent with the periphery is set as B, the rest areas are set as A, the public plate dots covered on the B area are cut off, then a part of the public plate dot reflecting sheet in another pattern is cut and attached to the B area on the reflecting sheet until the brightness of the B area is consistent with that of the A area, the attached public plate dot reflecting sheet in the same brightness is used as a secondary pattern, and the dot distribution formed by combining the main pattern and the secondary pattern is used as the required dot distribution on the reflecting sheet;
(3) and confirming the density value of each row of the required dot distribution, and designing a dot drawing consistent with the required dot distribution in an array in a CAD according to the dot density value distribution to serve as the dot distribution design of the first version reflector.
2. The method of claim 1, wherein Px Py is defined as Py for each pattern of public dot reflectors.
3. The method of claim 2, wherein Px of each primary pattern is equal to Px of the corresponding secondary pattern.
4. The method of claim 3, wherein: the plurality of patterns of the public plate dot reflecting sheet include a base pattern and an auxiliary pattern, the primary pattern is selected from the base pattern, and the secondary pattern is selected from the auxiliary pattern.
5. The method of claim 4, wherein: according to the position of the bright spot on the inclined plane part of the reflector plate irradiated by the lamp bead in the backlight module, determining the tangent position of the bright spot at the farthest position in the vertical direction as the brightest position, taking the lowest end of the inclined plane part of the reflector plate as the starting position, taking the highest end of the inclined plane part of the reflector plate as the ending position, and setting the public plate dot reflector plate of the basic pattern from the starting position to the brightest position and then to the ending position according to the trend that the dot density is gradually increased and then decreased.
6. The method as claimed in claim 4, further comprising the steps of:
(4) printing on the inclined plane part of the reflector plate according to the dot distribution design of the first reflector plate, observing the overall brightness, reducing the dot density of a dark area, increasing the dot density of a bright area, and designing a dot drawing in an array in a CAD according to the adjusted density value distribution to form the dot distribution design of the modified reflector plate.
7. The method of claim 6, further comprising the steps of: printing on the inclined plane part of the reflector plate according to the modified reflector plate mesh point distribution design, repeating the processing step of the step (4) after judging the brightness, and obtaining the final reflector plate mesh point distribution design after a plurality of times of modification.
8. The method of claim 1, wherein: the brightness is judged by visual inspection or measurement through a brightness measuring instrument.
9. The method of claim 8, wherein: the brightness consistency means that the visual brightness consistency or the numerical difference of a brightness measuring instrument does not exceed 30 percent.
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| CN112578560B (en) * | 2020-12-30 | 2022-09-16 | 深圳市康冠科技股份有限公司 | Method, system and related equipment for designing distribution of dots on reflector plate |
| CN113253478A (en) * | 2021-05-20 | 2021-08-13 | 武汉华星光电技术有限公司 | Display device |
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| JPH10160938A (en) * | 1996-11-29 | 1998-06-19 | Toshiba Lighting & Technol Corp | Light guide unit, back light, and lighting device using the same |
| CN101650492B (en) * | 2008-08-15 | 2011-12-07 | 北京京东方光电科技有限公司 | Light guide plate mould plate and method for manufacturing same |
| CN202216101U (en) * | 2011-08-26 | 2012-05-09 | 广东长虹电子有限公司 | Dot reflective sheet and backlight module using same |
| CN103818131B (en) * | 2014-02-11 | 2016-08-17 | 青岛歌尔声学科技有限公司 | A kind of method of printing-ink site on reflector plate |
| KR102473397B1 (en) * | 2016-01-28 | 2022-12-06 | 엘지전자 주식회사 | Back light unit and display device comprising it |
| KR20170091334A (en) * | 2016-02-01 | 2017-08-09 | 엘지전자 주식회사 | Back light unit and display device comprising it |
| CN207081919U (en) * | 2017-08-03 | 2018-03-09 | Tcl海外电子（惠州）有限公司 | Reflector plate, backlight module and display device |
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