CN112162433A - Backlight module and layout method of light emitting diodes thereof - Google Patents
Backlight module and layout method of light emitting diodes thereof Download PDFInfo
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- CN112162433A CN112162433A CN202011109074.0A CN202011109074A CN112162433A CN 112162433 A CN112162433 A CN 112162433A CN 202011109074 A CN202011109074 A CN 202011109074A CN 112162433 A CN112162433 A CN 112162433A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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Abstract
The invention discloses a backlight module and a layout method of light emitting diodes thereof, which comprises a substrate, a plurality of light emitting diodes and a plurality of power supply units, wherein the plurality of light emitting diodes are divided into a plurality of light source groups, the plurality of light source groups are further divided into at least one sub-light source group, each light source group is arranged on the substrate in a mode of surrounding the center of the substrate, the number of the sub-light source groups of the light source group which is closer to the center of the substrate is smaller, the number of the light emitting diodes in the sub-light source group which is closer to the center of the substrate is smaller, and each power supply unit is respectively connected with one light source group so as to provide power supply required for driving or adjusting the light emitting source of each light.
Description
Technical Field
The present invention relates to a backlight module of a liquid crystal display, and more particularly, to a backlight module and a layout method thereof, which divides light emitting diodes into a plurality of light source groups according to a user's viewing habit, and arranges all the light emitting diodes in the light source groups toward the periphery of a substrate with the center of the substrate as a center.
Background
The backlight module of the conventional lcd can be divided into Direct-Type (Direct-Type) and Edge-Type (Edge-Type) according to the position of the backlight module, the Edge-Type backlight module arranges a plurality of leds on a substrate, and is installed at the left and right sides or the upper and lower sides of the frame of the lcd, and forms a light-emitting surface through a plurality of optical components (e.g., light guide plates) and emits light toward the lcd panel of the lcd. The direct-type backlight module is formed by arranging and scattering a plurality of light emitting diodes on a substrate in an array form, and is disposed under a liquid crystal panel, and a plurality of optical components are used to form a light emitting surface and emit light toward the liquid crystal panel of the liquid crystal display.
However, the edge-type backlight module is not suitable for a large-sized lcd, and cannot be divided to adjust brightness and darkness separately, so that the contrast and color saturation of the lcd are sacrificed, and therefore, many lcds employ a direct-type backlight module, which controls different positions of the entire backlight module according to the brightness requirement of the output image by controlling the leds in different zones, so as to achieve the purpose of improving the contrast and color saturation.
Referring to fig. 1, in a conventional direct-type backlight module, light emitting diodes 2 disposed on a substrate 1 are divided into a plurality of light source groups 3, and each light source group 3 is arranged in a regular matrix, such that the light emitting diodes 2 are arranged in a uniform light emitting condition according to each light source group 3, so as to calculate a light mixing effect. However, the control of the leds 2 using this arrangement has the following disadvantages.
In terms of the usage of the lcd, the user usually observes the central area of the lcd as the highest usage rate, and the conventional light source group adopts a regular matrix arrangement, which is too rigid to meet the aforementioned usage habits and cannot control the usage habits, so it is necessary to improve the usage.
Disclosure of Invention
In view of the problems of the prior art, the present invention is directed to a backlight module having a plurality of light sources arranged on a substrate thereof according to the usage habit of a user, so as to provide a plurality of light source groups and achieve the purpose of adapting to the usage habit by using a more sophisticated control method.
According to the present invention, a backlight module is provided, which comprises a substrate, a plurality of light emitting diodes and a plurality of power units, wherein the plurality of light emitting diodes are divided into a plurality of light source groups, the plurality of light source groups divide the light emitting diodes into at least one sub-light source group, each light source group is arranged on the substrate in a manner of surrounding the center of the substrate, the number of sub-light source groups of the light source group closer to the center of the substrate is smaller, the number of light emitting diodes allocated to the sub-light source group closer to the center of the substrate is smaller, each power unit is connected with one of the light source groups, one of the power units is connected with the light source group, and each power unit provides power required for driving or adjusting the light emitting diode to emit light.
Wherein, the plurality of light emitting diodes are distributed to the plurality of light source groups and each light source group belongs toThe sub-light source groups are defined in the condition that the relation between the total number of the light emitting diodes and each light source group is 13+23+33+…+m3Where m is the number of groups of light sources from the center of the substrate to its periphery, and 13、23、33、…、m3The number of LEDs allocated to each light source group, the total number of each light source group from the center of the substrate to the periphery thereof and each sub-light source group to which the light source group belongs are related to 12+22+32+…+n2Wherein the number of the sub-light source groups belonging to each light source group from the center of the substrate to the periphery of the substrate is 1 in sequence2、22、32、…、n2The number of the light emitting diodes of one of the sub-light source groups to which each light source group belongs from the center to the periphery of the substrate is 1, 2, 3, …, n respectively.
Wherein, the layout of all the LEDs on the substrate is
Of the matrix of (a).
The number of the power supply units is equal to that of the light source groups, and the light emitting diodes of the same light source group are connected to the same power supply unit.
The number of the power supply units is equal to that of the sub-light source groups, and the light emitting diodes of the same group of sub-light source groups are connected to the same power supply unit.
Wherein, the forward bias of each LED in the same light source group falls within the same range.
The light emitting diodes of the same group of light source groups are classified by chromaticity coordinates within a predetermined range, and the light emitting diodes with different chromaticity coordinates are arranged on the substrate according to a manner of chromaticity coordinate averaging.
The light emitting diodes of the sub-light source groups in the same group are classified into at least one sub-classification range according to the chromaticity coordinates in a preset range, and the light emitting diodes with different chromaticity coordinates are arranged on the substrate according to a chromaticity coordinate averaging mode.
According to the object of the present invention, a layout method of light emitting diodes of a backlight module is provided, which comprises the following steps: receiving the number of a plurality of light emitting diodes required by the area required by the layout of the substrate, dividing the area required by the layout of the substrate into a plurality of light source groups according to the number of the plurality of light emitting diodes under a specified condition, dividing the number of the light emitting diodes belonging to each light source group into a plurality of sub-light source groups, judging whether each light source group is suitable for respectively arranging each sub-light source group to which each light source belongs on the substrate in a mode of surrounding the center of the substrate, if so, respectively arranging each light source group into a suitable power supply unit, otherwise, re-establishing the specified condition to divide the number of the plurality of light source groups and the number of the plurality of sub-light source groups divided by each light source group until the plurality of light source groups can arrange the plurality of sub-light source groups to which.
Wherein, the specified condition is that the number of the plurality of light source groups can be divided by the number of the required light emitting diodes, and the number of the light emitting diodes distributed to each light source group is enough to be divided by the number of the respective plurality of sub-light source groups.
The definition of whether each light source group is suitable for arranging each sub-light source group to which each light source group belongs on the substrate in a mode of respectively surrounding the center of the substrate is that each light source group is arranged on the substrate in a mode of respectively surrounding the center of the substrate, the number of the sub-light source groups to which each light source group belongs is smaller as the light source groups are closer to the center of the substrate, and the number of the light emitting diodes distributed to the sub-light source groups closer to the center of the substrate is smaller.
Wherein, all the LEDs are divided into m light source groups, the number of the LEDs distributed to each light source group is 1 from the center of the substrate to the periphery of the substrate3、23、33、…、m3The number of sub-light source groups from the center of the substrate to the light source groups of the substrate is 12、22、32、…、n2Wherein each of the light source groups from the center of the substrate to the periphery of the substrateThe number of the light emitting diodes allocated to the sub-light source group is 1, 2, 3, …, n in sequence.
According to the above, the backlight module divides the light source groups with different numbers of the light emitting diodes according to the use habit of watching the liquid crystal display by the user, thereby improving the control light emitting fineness.
Drawings
FIG. 1 is a schematic diagram of a layout of LEDs on a substrate of a conventional direct-type backlight module.
Fig. 2 is a layout diagram of leds on a substrate according to an embodiment of the invention.
FIG. 3 is a schematic diagram of the connection between the light source group and the power unit according to the present invention.
Fig. 4 is a layout diagram of leds on a substrate according to another embodiment of the invention.
FIG. 5 is a schematic diagram illustrating the connection between the sub-light source group and the power unit according to the present invention.
FIG. 6 is a schematic diagram of a liquid crystal display according to the present invention.
FIG. 7 is a flow chart illustrating a method for arranging LEDs of the backlight module according to the present invention.
Reference numerals
1. 4: substrate
3. 5: light source group
50: sub-light source group
2. 500: light emitting diode
6: power supply unit
60: feedback control unit
7: backlight module
70: optical unit
72: layout zoning
700: light guide layer
702: a first diffusion layer
704: first brightness enhancing layer
706: second brightness enhancing layer
708: a second diffusion layer
8: liquid crystal panel
S701 to S705: procedure step
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2, the present invention is a backlight module including a substrate 4, a plurality of leds 500 and a plurality of power units 6, wherein the substrate 4 is a Printed Circuit Board (PCB) or a Metal Core Printed Circuit Board (MCPCB), for example: aluminum substrate, ceramic substrate …, etc.
In the present invention, the plurality of light emitting diodes 500 are divided into a plurality of light source groups 5, the plurality of light emitting diodes 500 of each light source group 5 are respectively divided into at least one sub-light source group 50, each light source group 5 is arranged on the substrate 4 in a manner of surrounding the center of the substrate 4, the number of the sub-light source groups 50 of the light source group 5 closer to the center of the substrate 4 is smaller, and the number of the light emitting diodes 500 in the sub-light source group 50 closer to the center of the substrate 4 is smaller, and the light emitting diodes 500 may be multicolor light emitting diodes (RGB LEDs), sub-millimeter light emitting diodes (Mini LEDs) or Micro light emitting diodes (Micro LEDs).
Referring to fig. 3, each power unit 6 is connected to the light source group 5, and each power unit 6 provides power for driving or adjusting the light emitted from the light emitting diode 500. Further, a feedback control unit 60 is respectively disposed between each power unit 6 and the light source group 5 connected thereto, each feedback control unit 60 respectively receives an electrical signal (e.g., voltage or current) of the light emitting diode 500 of the light source group 5, each feedback control unit 60 respectively generates a feedback control signal according to each electrical signal, and each feedback control unit 60 respectively adjusts the power required by the light source of the light emitting diode 500 of the light source group 5 according to each feedback control signal.
In one embodiment of the present invention, referring again to FIG. 2, if it is desired to have a substrate 4 with a pattern thereonIn order to arrange 100 light emitting diodes 500 on the substrate 4 according to the area and the related light emitting requirement condition (e.g., brightness), at this time, first, how many light source groups 5 the 100 light emitting diodes 500 need to be divided into according to the specified condition is planned, in this embodiment, the definition of the light source groups 5 and the sub-light source groups 50 divided by the light emitting diodes 500 according to the specified condition is: the total number of the light emitting diodes 500 and the light source groups 5 from the center of the substrate 4 to the periphery thereof are related to 13+23+33+…+m3Where m is the number of each light source group 5, 13、23、33、…、m3The number of LEDs allocated to each light source group 5, and the total number of the sub-light source groups 50 of each light source group 5 is 12+22+32+…+n2Wherein the number of sub-light source groups belonging to each light source group from the center of the substrate to the periphery of the substrate is 1 in sequence2、22、32、…、n2The number of the light emitting diodes allocated to each sub-light source group of the light source groups from the center of the substrate to the periphery of the substrate is 1, 2, 3, … and n in sequence, wherein m is n.
In other words, the 100 light emitting diodes 500 may be divided into four light source groups 5, the number of light emitting diodes of each light source group 5 from the center of the substrate 4 to the periphery thereof is 1, 8, 27, 64, the number of sub light source groups 50 to which the four light source groups 5 belong is 1, 4, 9, 16, and the number of light emitting diodes allocated to each sub light source group 50 is 1, 2, 3, 4.
As described above, the first to fourth light source groups 5 to 5 are sequentially arranged from the center of the substrate 4 to the periphery thereof, the number of the sub light source groups 50 of the first light source group 5 is 1, the number of the light emitting diodes 500 is 1, the number of the sub light source groups 50 of the second light source group 5 is 4, the number of the light emitting diodes 500 of each sub light source group 50 is 2, the total number of the light emitting diodes 500 is 8, the number of the sub light source groups 50 of the third light source group 5 is 9, the number of the light emitting diodes 500 of each sub light source group 50 is 3, the total number of the light emitting diodes 500 is 27, the number of the sub light source groups 50 of the fourth light source group 5 is 16, the number of the light emitting diodes 500 of each sub light source group 50 is 4, the total number of the light emitting diodes 500 is 64, so that the number of the light emitting diodes 500 of each light source group 5 is sequentially 1, and 64, 8. 27 and 64, a total of 100 light emitting diodes 500, the number of the sub-light source groups 50 to which each light source group 5 belongs from the center of the substrate 1 to the periphery of the substrate 1 is 1, 4, 9 and 16 in sequence, and a total of 30 sub-light source groups 50.
In the present invention, the light emitting diodes 500 with integer multiple of the above rule can be further disposed on the substrate 4, as shown in fig. 4, for example: 100 × 25 leds 500, in this case, the substrate 4 may be divided into 25 layout partitions 72, and the number of the leds 500 in each layout partition 72 is 100, and each layout partition 72 arranges the leds 500 on the substrate 4 in the above-described embodiment.
In addition, when m is 5, the number of the light emitting diodes 500 is 225, the number of the sub-light source groups 50 is 55, and all the light emitting diodes 500 are arranged on the substrate 4 in a matrix (15 × 15) having a square root of the number thereof. Further, the number of the light emitting diodes 500 is 441, the number of the sub-light source groups 50 is 91, and all the light emitting diodes 500 are arranged on the substrate 4 in a matrix (21 × 21) having a square root of the number of the light emitting diodes, and so on, that is, all the light emitting diodes 500 are laid out on the substrate 4 in such a manner that m is 6
Of the matrix of (a).
In the present invention, please refer to fig. 3, in order to control the light emitting manner of each light source group 5, the number of each power unit 6 and each feedback control unit 60 is equal to the number of each light source group 5. Alternatively, in order to more precisely control the light emitting manner of each sub-light source group 50 of each light source group 5, please refer to fig. 5, the number of each power unit 6 and each feedback control unit 60 is equal to the number of each sub-light source group 50. In addition, the forward bias of each led 500 in the same light source group 5 falls within the same range, so that each power unit 6 can use the power corresponding to the forward bias to control each led 500, thereby further reducing the power loss.
In the present invention, the light emitting diodes 500 of the same group of light source groups 5 are classified by chromaticity coordinates within a predetermined range, and the light emitting diodes 500 of different chromaticity coordinates are disposed on the substrate 4 in a manner of averaging the chromaticity coordinates. Alternatively, the leds 500 of the sub-light source groups 50 in the same group are further classified into at least one sub-classification range according to the chromaticity coordinates within the predetermined range, and the leds 500 of the chromaticity coordinates of each sub-classification are disposed on the substrate 4 in a manner of averaging the chromaticity coordinates. Therefore, the light emitting uniformity of the backlight module is improved.
Referring to FIG. 6, the backlight module of the present invention is installed in a liquid crystal display, and the backlight module 7 is disposed under the liquid crystal panel 8, wherein the backlight module 7 further includes an optical unit 70, and the optical unit 70 is disposed between the substrate 4 of the backlight module 7 and the liquid crystal panel 8.
In the present invention, the optical unit 70 is sequentially provided with a light guiding layer 700, a first diffusion layer 702, a first brightness enhancing layer 704, a second brightness enhancing layer 706 and a second diffusion layer 708 between the backlight module 7 and the liquid crystal panel 8, wherein the light guiding layer 700, the first diffusion layer 702, the first brightness enhancing layer 704, the second brightness enhancing layer 706 and the second diffusion layer 708 are microstructural films for increasing the light emitting efficiency of the backlight module 7.
Referring to fig. 7, the present invention is a method for arranging light emitting diodes of a backlight module, comprising the following steps:
(S701) receiving the number of the plurality of light emitting diodes 500 required for the area calculation of the substrate 4 to be laid out;
(S702) dividing the light source groups into a plurality of light source groups 5 under a predetermined condition according to the number of the light emitting diodes 500, and dividing each light source group 5 into a plurality of sub-light source groups 50;
(S703) determining whether each light source group 5 is suitable for disposing each sub-light source group 50 to which each light source group belongs on the substrate 4 in a manner of respectively surrounding the center of the substrate 4, if so, performing the step (S704), otherwise, performing the step (S705);
(S704) respectively configuring appropriate power supply units 6 according to the light source groups 5;
(S705), the predetermined conditions are re-established to divide the light source groups 5 into the number of sub-light source groups 50 divided by each light source group 5 until the light source groups 5 can arrange the sub-light source groups 50 on the substrate 4 in a manner of surrounding the center of the substrate 4.
In the present invention, the specified conditions in step (S702) are that the number of the light emitting diodes 500 allocated to the plurality of light source groups 5 is divisible by the number of the plurality of light source groups 5, and the number of the light emitting diodes 500 allocated to each light source group 5 is divisible by the number of the respective plurality of sub-light source groups 50. In addition, in step (S703), each light source group is disposed on the substrate in a manner surrounding the center of the substrate, and the number of the sub light source groups of the light source group closer to the center of the substrate is smaller, and the number of the light emitting diodes in the sub light source group closer to the center of the substrate is smaller.
Further, the relationship between the plurality of light emitting diodes, the plurality of light source groups and the sub-light source groups thereof is as follows: the plurality of LEDs are divided into m light source groups 5, and the number of LEDs allocated to each light source group 5 is 1 from the center of the substrate 4 to the periphery of the substrate 43、23、33、…、m3. The number relation of each sub-light source group 50 from the center of the substrate 4 to each light source group 5 of the substrate 4 is 12、22、32、…、n2And the number of the distributed light-emitting diodes of each sub light source group to which each light source group belongs from the center of the substrate to the periphery of the substrate is 1, 2, 3, … and n respectively.
In summary, the backlight module 7 of the present invention divides the plurality of light emitting diodes 500 into the plurality of light source groups 5 and the plurality of sub-light source groups 50 according to the usage habit of the user viewing the liquid crystal display, and is disposed on the substrate 4 according to the usage habit of the user viewing the liquid crystal display, and the power unit 6 is used to control each light source group 5 respectively, thereby solving the problem that the conventional backlight module is controlled by matrix partition instead of being arranged according to the habit of the user, and further saving power according to the forward bias voltage grouping, and further improving the light emitting uniformity according to the chromaticity coordinate.
The above detailed description is specific to possible embodiments of the present invention, but the above embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.
Claims (14)
1. A backlight module, comprising:
a substrate;
the light source groups are respectively provided with at least one sub-light source group, each light source group is arranged on the substrate in a mode of surrounding the center of the substrate, the number of the sub-light source groups of the light source group which is closer to the center of the substrate is smaller, and the number of the light emitting diodes in the sub-light source groups which are closer to the center of the substrate is smaller; and
and each power supply unit is connected with each light source group and provides power supply for driving or adjusting the light sources emitted by the light source groups.
2. The backlight module according to claim 1, wherein the plurality of light emitting diodes are divided into the plurality of light source groups and the number of the sub-light source groups according to a predetermined condition, the predetermined condition being defined as:
the relation between each light source group from the center of the substrate to the periphery of the substrate and the total number of the light emitting diodes is 13+23+33+…+m3Wherein m is the number of each light source group and is a positive integer of 13、23、33、…、m3For each of the center of the substrate to the periphery of the substrateThe number of the light emitting diodes to which the light source group is allocated; and
the relation of the total number of the light source groups from the center of the substrate to the periphery of the substrate and the sub light source groups is 12+22+32+…+n2In which 1 is2、22、32、…、n2The number of the plurality of sub-light source groups of each light source group from the center of the substrate to the periphery of the substrate is 1, 2, 3, …, n is the number of the light emitting diodes distributed to each sub-light source group of each light source group from the center of the substrate to the periphery of the substrate.
3. The backlight module according to claim 2, wherein all the LEDs of the substrate are arranged in a manner
Of the matrix of (a).
4. The backlight module as claimed in claim 1, wherein the number of the power units is equal to the number of the light source groups, and the light emitting diodes of the same group of the light source groups are connected to the same power unit.
5. The backlight module as claimed in claim 1, wherein the number of each power unit is equal to the number of each sub-light source group, and the light emitting diodes of the same sub-light source group are connected to the same power unit.
6. The backlight module as claimed in claim 1, wherein forward bias voltages of the light emitting diodes in the same light source group are within the same range.
7. The backlight module according to claim 1, wherein the light emitting diodes of the same light source group are classified by chromaticity coordinates within a predetermined range, and the light emitting diodes of different chromaticity coordinates are disposed on the substrate in a manner of chromaticity coordinate averaging.
8. The backlight module according to claim 7, wherein the LEDs in the same sub-light source group are sub-classified into at least one sub-classification according to the chromaticity coordinates within the predetermined range, and the LEDs in the chromaticity coordinates of each sub-classification are disposed on the substrate in a manner of averaging the chromaticity coordinates.
9. The backlight module according to claim 1, wherein a feedback control unit is disposed between each of the power units and the light source group connected thereto, each of the feedback control units receives an electrical signal of the light emitting diodes of the matched light source group, each of the feedback control units generates a feedback control signal according to the electrical signal, and each of the feedback control units adjusts the power required by the light source group according to the feedback control signal.
10. A layout method of light emitting diodes of a backlight module is characterized by comprising the following steps:
receiving the number of a plurality of light-emitting diodes required by the area calculation of a substrate to be laid;
dividing the light source groups into a plurality of light source groups according to the number of the light emitting diodes under a specified condition, and dividing each light source group into a plurality of sub-light source groups;
judging whether the plurality of light source groups are suitable for arranging the plurality of sub-light source groups to which the light sources belong on the substrate in a mode of respectively surrounding the center of the substrate;
if yes, ending; and
when the plurality of light source groups cannot arrange the plurality of sub-light source groups to which the light sources belong on the substrate in a mode of respectively surrounding the center of the substrate, the specified conditions are newly set to be divided into the number of the plurality of light source groups and the number of the plurality of sub-light source groups divided by each light source group until the plurality of light source groups can arrange the plurality of sub-light source groups to which the light sources belong on the substrate in a mode of surrounding the center of the substrate.
11. The method as claimed in claim 10, wherein after the light source groups respectively distribute the sub-light source groups on the substrate in a manner of surrounding the center of the substrate, the light source groups are respectively configured with the proper power units.
12. The method as claimed in claim 10, wherein the predetermined condition is that the number of the light source groups is divisible by the number of the required light emitting diodes, and the number of the light emitting diodes allocated to each light source group is sufficient to be divisible by the number of the light source groups.
13. The method as claimed in claim 12, wherein the definition of whether the plurality of light source groups are suitable for disposing the plurality of sub-light source groups on the substrate respectively around the center of the substrate is that each of the light source groups is disposed on the substrate respectively around the center of the substrate, and the number of the sub-light source groups belonging to the light source group closer to the center of the substrate is smaller and the number of the light emitting diodes allocated to the sub-light source group closer to the center of the substrate is smaller.
14. The method as claimed in claim 13, wherein the plurality of LEDs are divided into m light source groups, and the number of LEDs allocated to each light source group is 1 from the center of the substrate to the periphery of the substrate3、23、33、…、m3From the center of the substrate to the baseThe quantity relation of each sub-light source group of each light source group of the board is 1 in sequence2、22、32、…、n2Wherein the numbers of the light emitting diodes allocated to the sub light source groups to which the light source groups belong from the center of the substrate to the periphery of the substrate are 1, 2, 3, …, n, respectively.
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| CN202011109074.0A CN112162433A (en) | 2020-10-16 | 2020-10-16 | Backlight module and layout method of light emitting diodes thereof |
| TW109137340A TWI757935B (en) | 2020-10-16 | 2020-10-27 | A backlight module and a layout method of light-emitting diodes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359352A (en) * | 2021-07-01 | 2021-09-07 | 业成科技（成都）有限公司 | Direct type backlight module and display thereof |
| CN116466514A (en) * | 2023-04-18 | 2023-07-21 | 业成科技（成都）有限公司 | Light emitting layout structure of backlight module |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200709729A (en) * | 2005-08-30 | 2007-03-01 | Lightsonic Optoelectronics Inc | Backlight panel device and OLED structure thereof |
| CN2896325Y (en) * | 2006-03-21 | 2007-05-02 | 比乐达国际有限公司 | Light-emitting-diode back-light module of display |
| CN101936487A (en) * | 2010-08-20 | 2011-01-05 | 深圳市华星光电技术有限公司 | Backlight module |
| CN101956935A (en) * | 2010-07-30 | 2011-01-26 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| TW201124776A (en) * | 2010-01-15 | 2011-07-16 | Hon Hai Prec Ind Co Ltd | Backlight module and liquid crystal display |
| JP2011238368A (en) * | 2010-05-06 | 2011-11-24 | Funai Electric Co Ltd | Plane light-emitting device and manufacturing method of plane light-emitting device |
| TW201905555A (en) * | 2017-06-28 | 2019-02-01 | 云光科技股份有限公司 | Direct type backlight module capable of reducing the phenomenon of dark and bright spots and improving light emission efficiency |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI475553B (en) * | 2013-04-29 | 2015-03-01 | Wistron Corp | Backlight control module and backlight control method |
| CN107909970A (en) * | 2017-12-29 | 2018-04-13 | 晨星半导体股份有限公司 | Display device and its corresponding local dimming driving method |
-
2020
- 2020-10-16 CN CN202011109074.0A patent/CN112162433A/en active Pending
- 2020-10-27 TW TW109137340A patent/TWI757935B/en active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200709729A (en) * | 2005-08-30 | 2007-03-01 | Lightsonic Optoelectronics Inc | Backlight panel device and OLED structure thereof |
| CN2896325Y (en) * | 2006-03-21 | 2007-05-02 | 比乐达国际有限公司 | Light-emitting-diode back-light module of display |
| TW201124776A (en) * | 2010-01-15 | 2011-07-16 | Hon Hai Prec Ind Co Ltd | Backlight module and liquid crystal display |
| JP2011238368A (en) * | 2010-05-06 | 2011-11-24 | Funai Electric Co Ltd | Plane light-emitting device and manufacturing method of plane light-emitting device |
| CN101956935A (en) * | 2010-07-30 | 2011-01-26 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN101936487A (en) * | 2010-08-20 | 2011-01-05 | 深圳市华星光电技术有限公司 | Backlight module |
| TW201905555A (en) * | 2017-06-28 | 2019-02-01 | 云光科技股份有限公司 | Direct type backlight module capable of reducing the phenomenon of dark and bright spots and improving light emission efficiency |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359352A (en) * | 2021-07-01 | 2021-09-07 | 业成科技（成都）有限公司 | Direct type backlight module and display thereof |
| CN113359352B (en) * | 2021-07-01 | 2022-09-20 | 业成科技（成都）有限公司 | Direct type backlight module and display thereof |
| CN116466514A (en) * | 2023-04-18 | 2023-07-21 | 业成科技（成都）有限公司 | Light emitting layout structure of backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202217407A (en) | 2022-05-01 |
| TWI757935B (en) | 2022-03-11 |
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