CN215933166U - Driving module, backlight module and display device - Google Patents
Driving module, backlight module and display device Download PDFInfo
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- CN215933166U CN215933166U CN202121810966.3U CN202121810966U CN215933166U CN 215933166 U CN215933166 U CN 215933166U CN 202121810966 U CN202121810966 U CN 202121810966U CN 215933166 U CN215933166 U CN 215933166U
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Abstract
The utility model relates to the technical field of display, and discloses a driving module, a backlight module and a display device. The driving module, the backlight module and the display device provided by the utility model can independently and accurately control each light-emitting unit of the backlight panel without limiting a row or a column of light-emitting units, and are driven by one driving unit, so that the adjustability of local dimming is improved, the wiring design difficulty is reduced, the impedance influence caused by wiring winding is reduced, and the system loss is reduced.
Description
Technical Field
The utility model relates to the technical field of display, in particular to a driving module, a backlight module and a display device.
Background
In order to improve the contrast and brightness of the display screen, a Local dimming (Local dimming) display mode is currently adopted, and a Mini light emitting diode is more commonly used to realize the effect of Local backlight control.
Referring to fig. 1, a backlight module 100 in the prior art includes a driving module 110 and a backlight panel 120, a plurality of Mini light emitting diodes 121 arranged in an array are disposed in the backlight panel 120, a plurality of driving units 111 are disposed on the driving module 110, and the plurality of driving units 111 are led out through traces 112 and connected to the backlight panel 120 through a flexible circuit board 101.
Referring to fig. 2, the driving module 110 of the backlight module 100 in the prior art includes a main controller 113 (disposed on the same substrate as the driving unit 111 for facilitating wiring), the main controller 113 provides row start signals (COMSEL0, COMSEL1 to COMSELn) for each row, respectively controls the on and off of the switch tubes (SW0, SW1 to SWn), and when the corresponding switch tubes are turned on, the corresponding row scan lines (COM0, COM1 to COMn) turn on the driving voltage VLEDThen, the on-state of the driving signal output terminals (OUT 0-OUT 15) of the driving unit 111 is controlled, so that the conduction and light emission of the Mini light emitting diodes 121 can be accurately controlled.
In the prior art, each driving unit 111 includes a data signal input terminal SIN, a clock signal input terminal CLK, a latch data input terminal LAT, and a data signal output terminal SOUT, and the main controller 113 includes a data signal output terminal SDI, a clock signal output terminal, and a latch data output terminal CS. The clock signal input terminal and the latch data input terminal of each driving unit 111 are communicated through the serial peripheral interface SPI.
The driving units 111 are connected in series to sequentially shift and transmit data signals to each driving unit 111, the clock signal input terminal CLK of each driving unit 111 is connected to the clock signal output terminal of the main controller 113 to receive a unified clock signal SCLK (serial clock signal), the latch data input terminal LAT of each driving unit 111 is connected to the latch data output terminal CS of the main controller 113, and the output of each driving unit 111 is maintained before the next frame of image data is transmitted, thereby ensuring display.
All the driving units 111 are controlled in a unified manner through one latching data provided by the main controller 113, each driving unit 111 is required to drive one row of Mini light emitting diodes 121 correspondingly, the wires on the backlight panel 120 are respectively led out in a concentrated manner according to the column sequence of the Mini light emitting diodes 121, and each led-out position is connected with each driving unit 111, so that the wires 112 on the driving module 110 are overlapped in a large amount, the number of design layers of the substrate is required to be increased for ensuring the electrical independence of each wire, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing problems, an object of the present invention is to provide a driving module, a backlight module and a display device, so as to reduce the limitation of the matching connection rule between the driving unit and the light emitting unit, reduce the overlapping design of the traces, reduce the number of design layers of the substrate, and reduce the cost.
According to an aspect of the present invention, there is provided a driving module for driving a backlight panel, the backlight panel including a plurality of light emitting units arranged in rows and columns, the driving module including:
a substrate;
a master controller disposed on the substrate, the master controller including a plurality of latched data output terminals;
the driving units are arranged on the substrate, the latch data input ends of the driving units are correspondingly connected with the latch data output ends of the main controller, and the driving signal output ends of the driving units are correspondingly connected with the light-emitting units.
Optionally, the plurality of driving signal output ends of the plurality of driving units are led out of the substrate through routing lines, the routing lines are sequentially arranged at intervals, and the arrangement sequence of the routing lines is consistent with that of the plurality of driving signal output ends.
Optionally, the plurality of data signal input terminals of the plurality of driving units are connected in parallel to the data signal output terminal of the main controller.
Optionally, a plurality of clock signal input terminals of the plurality of driving units are connected in parallel to a clock signal output terminal of the main controller.
According to another aspect of the present invention, there is provided a backlight module including:
a backlight panel including a plurality of light emitting units arranged in rows and columns;
the utility model provides a driving module.
Optionally, the driving signal input ends of the light emitting units in the same row of the plurality of light emitting units are led out at the same position by outgoing lines, the outgoing lines are sequentially arranged at intervals, and the arrangement sequence of the outgoing lines is consistent with the row sequence of the light emitting units in the same row.
Optionally, each row of the light emitting units is connected to at least one driving unit of the driving module in a matching manner.
Optionally, the number of driving units of the driving module is greater than the number of columns of the plurality of light emitting units.
Optionally, the plurality of driving units are arranged in a line on the substrate and parallel to the row direction of the plurality of light emitting units.
According to another aspect of the present invention, a display device is provided, which includes the driving module provided in the present invention.
The driving module provided by the utility model is used for driving the backlight panel, and comprises a main controller and a plurality of driving units which are arranged on a substrate, wherein the main controller comprises a plurality of latch data output ends, the plurality of latch data output ends are correspondingly connected with the latch data input ends of each of the plurality of driving units one by one, a plurality of driving signal output ends of the plurality of driving units are sequentially connected with a plurality of light-emitting units of the backlight panel through a plurality of transmission lines according to the column-by-column scanning sequence of the light-emitting units, and each driving unit is controlled through the corresponding latch data provided by the main controller, so that the opening and closing of each light-emitting unit can be accurately and independently controlled, the wiring rule of wiring is not required to be limited, the overlapping of the wiring can be reduced, the number of design layers of the substrate can be reduced, and the cost can be reduced.
Furthermore, the part of the light emitting unit in one row is connected to the driving units at other positions, so that the length of the wiring is prolonged, the consistency of the lengths of the wiring from each light emitting diode to the driving units is improved conveniently under the condition of no overlapping requirement, the impedance of the wiring is homogenized, and the consistency of the brightness of the light is improved.
The backlight module provided by the utility model comprises the driving module, each light-emitting unit of the backlight panel can be accurately and independently controlled, the wiring design difficulty of the driving module is reduced, the design layer number requirement of a substrate of the driving module can be reduced, and the cost is reduced.
The utility model also provides a display device which comprises the driving module, can accurately and independently control each light-emitting unit, reduces the wiring design difficulty, and can reduce the system cost and power consumption.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 shows a schematic structural diagram of a backlight module according to the prior art;
FIG. 2 is a schematic diagram illustrating a control method of a driving unit of a backlight module according to the prior art;
FIG. 3 is a schematic diagram illustrating a control method of a driving unit of a backlight module according to an embodiment of the utility model;
fig. 4 is a schematic structural diagram of a backlight module according to an embodiment of the utility model.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 3 is a schematic diagram illustrating a control method of a driving unit of a backlight module according to an embodiment of the utility model. The main difference between the backlight module 200 of the present embodiment and the backlight module 100 of the prior art is the connection manner of the driving units, and other parts are not described in detail.
Referring to fig. 3, the data signal input end SIN of each driving unit 211 of the backlight module 200 according to the embodiment of the present invention is connected to the data signal output end SDI of the main controller 213, the clock signal input end CLK is connected to the clock signal output end SCLK (serial clock signal) of the main controller 213, and the latch data input end LAT is connected to the corresponding latch data output end (CS 0-CSm) of the main controller 213, that is, the main controller 213 provides the corresponding latch control signal to control the output of each driving unit 211 through the plurality of latch data output ends, when the brightness of the partial area needs to be adjusted, only the state of the latch control signal needs to be changed, which is more convenient.
In the present embodiment, the number of the driving signal output terminals of each driving unit 211 is equal to 16, but the specific specification of each driving unit is not particularly limited in the present invention.
The number of bits of the latched data signal is the same as the number of the driving signal output ends of each driving unit 211, and each bit of the latched data signal correspondingly controls the state of one driving signal output end of the corresponding driving unit 211 to control the brightness of one Mini light emitting diode 121.
In this embodiment, one Mini led 121 is taken as one light emitting unit, in an alternative embodiment, the light emitting unit includes a Mini led string, and the number of the Mini leds in the string is not particularly limited, that is, the minimum size of the area of the backlight panel with adjustable brightness is not particularly limited, and the serial number of the Mini leds (the minimum adjustable unit is the light emitting unit including the string of Mini leds) can be actually adjusted according to the requirement of the local control backlight, so as to adjust the local size of the local control backlight.
Fig. 4 is a schematic structural diagram of a backlight module according to an embodiment of the utility model.
Referring to fig. 4, the plurality of driving units 211 are sequentially disposed on the substrate of the driving module 210 of the backlight module 200 according to the embodiment of the present invention, the corresponding plurality of traces 212 are sequentially disposed from left to right without overlapping and are led out to the backlight panel 220 through the plurality of flexible circuit boards 101, the wirings are sequentially arranged on the backlight panel 220 without overlapping in a left-to-right order (physical order of the driving signal output terminals of the driving units 211, in an alternative embodiment, the driving units 211 are not arranged in a linear manner, the wirings may be arranged in an oblique manner, but are substantially arranged in a left-to-right order), and are connected to each Mini light emitting diode 121 in a row-by-row scanning order of the Mini light emitting diodes 121 (the driving signal input terminals of the Mini light emitting diodes 121 in the same row are led out at the same position through the outgoing lines, and the outgoing lines are sequentially arranged at intervals and are in the same order as the row order of the Mini light emitting diodes 121, so that the outgoing lines are not overlapped), thereby enabling the wires to be arranged in sequence without overlapping.
In the present embodiment, the number of the driving units 211 is five, the Mini light emitting diodes 121 are arranged in five rows and three columns, for example, there are 15 corresponding wires 212 (one wire is a complete wire connecting the light emitting diodes 12 to the driving unit 111), each driving unit 211 is connected to three Mini light emitting diodes 121, and each column of the Mini light emitting diodes 121 is driven by two or three driving units 211.
Correspondingly, when the light emission of the first row of Mini light emitting diodes 121 needs to be controlled, the first driving signal output end of the first driving unit 211, the third driving signal output end of the second driving unit 211 and the second driving signal output end of the fourth driving unit 211 are controlled to be turned on, so that the light emission of the first row of Mini light emitting diodes 121 can be controlled accurately, and then the brightness of the display driving corresponding to each Mini light emitting diode 121 can be controlled according to the gray scale signal of the used data signal, wherein the latched data of the first to third driving units 211 are respectively 100, 001 and 101, but the instruction rule of the latched data is not particularly limited in the present application, and the latched data can be adjusted adaptively according to the driving matching relationship between the driving units 211 and the Mini light emitting diodes 121.
In this embodiment, the control can be precisely controlled to each Mini led 121 according to the commands of the plurality of latched data respectively provided by the main controller 213.
The Mini leds 121 in each row are led out from different positions of the backlight panel 220 (the side of the backlight panel 220 connected to the driving module 210), so that the driving unit 211 can be selected for driving conveniently, the length of the wiring can be reduced integrally, the electrical loss can be reduced, and the power consumption can be saved.
In this embodiment, the number of the driving units 211 is greater than the number of rows of the Mini light emitting diodes 121, so that a portion of the Mini light emitting diodes 121 in each row is connected to a driving unit in another position (generally, a driving unit in an adjacent position of the driving unit matched with the row of the Mini light emitting diodes 121), and the length of the routing lines is correspondingly increased, so that the lengths of the routing lines from one row of the Mini light emitting diodes 121 to the driving unit 211 are consistent, the lengths of the routing lines are consistent without increasing the number of the substrate layers, and the display effect of the corresponding display device is ensured while maintaining the cost.
The number of Mini leds driven by each driving unit is not particularly limited in the present invention, and any number of matching relationships can be accurately controlled to each Mini led 121 according to the plurality of latched data commands provided by the main controller 213.
The driving module is used for driving the backlight panel and comprises a main controller and a plurality of driving units, wherein the main controller is arranged on a substrate and comprises a plurality of latching data output ends, the latching data output ends are correspondingly connected with the latching data input ends of the driving units one by one, and a plurality of driving signal output ends of the driving units are sequentially connected with a plurality of light-emitting units of the backlight panel through a plurality of transmission lines according to the row-by-row scanning sequence of the light-emitting units. The driving units are in driving connection with the light-emitting units according to the row-by-row sequence of the light-emitting units, overlapping of wiring is avoided, each driving unit is independently controlled through corresponding latching data provided by the main controller, the on and off of each light-emitting unit can be accurately and independently controlled, and any scanning control mode of the light-emitting units can be realized.
Furthermore, the number of the driving units for driving the row of light emitting units is at least one, so that part of the row of light emitting units can be connected to the driving units at other positions, the length of the routing is prolonged, the consistency of the lengths of the routing from the light emitting diodes to the driving units is improved, the impedance of the routing is homogenized, and the consistency of the brightness of light emission is improved.
The backlight module provided by the utility model comprises the driving module, each light-emitting unit of the backlight panel can be accurately and independently controlled, the wiring design difficulty of the driving module is reduced, the design layer number requirement of a substrate of the driving module can be reduced, and the cost is reduced.
The utility model also provides a display device which comprises the driving module, can accurately control each light-emitting unit, reduces the wiring design difficulty, and can reduce the system cost and power consumption.
In accordance with the embodiments of the present invention as set forth above, these embodiments are not exhaustive and do not limit the utility model to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model and various embodiments with various modifications as are suited to the particular use contemplated. The utility model is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A driving module for driving a backlight panel, the backlight panel comprising a plurality of light emitting cells arranged in rows and columns, the driving module comprising:
a substrate;
a master controller disposed on the substrate, the master controller including a plurality of latched data output terminals;
the driving units are arranged on the substrate, the latch data input ends of the driving units are correspondingly connected with the latch data output ends of the main controller, and the driving signal output ends of the driving units are correspondingly connected with the light-emitting units.
2. The drive module of claim 1,
the driving signal output ends of the driving units are led out of the substrate through wires which are sequentially arranged at intervals, and the arrangement sequence of the wires is consistent with that of the driving signal output ends.
3. The drive module of claim 1,
and a plurality of data signal input ends of the plurality of driving units are connected to a data signal output end of the main controller in parallel.
4. The drive module of claim 1,
and a plurality of clock signal input ends of the plurality of driving units are connected to a clock signal output end of the main controller in parallel.
5. A backlight module, comprising:
a backlight panel including a plurality of light emitting units arranged in rows and columns;
a drive module according to any one of claims 1 to 4.
6. The backlight module according to claim 5,
the driving signal input ends of the light-emitting units in the same row of the plurality of light-emitting units are led out at the same position by lead-out wires, the lead-out wires are arranged at intervals in sequence, and the arrangement sequence of the lead-out wires is consistent with the row sequence of the light-emitting units in the same row.
7. The backlight module according to claim 5,
and each row of the light-emitting units is connected with at least one driving unit of the driving module in a matching way.
8. The backlight module according to claim 5,
the number of the driving units of the driving module is larger than the number of the rows of the plurality of light-emitting units.
9. The backlight module according to claim 5,
the plurality of driving units are arranged in a straight line on the substrate and are parallel to the row direction of the plurality of light emitting units.
10. A display device comprising the driving module according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121810966.3U CN215933166U (en) | 2021-08-04 | 2021-08-04 | Driving module, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121810966.3U CN215933166U (en) | 2021-08-04 | 2021-08-04 | Driving module, backlight module and display device |
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| Publication Number | Publication Date |
|---|---|
| CN215933166U true CN215933166U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121810966.3U Active CN215933166U (en) | 2021-08-04 | 2021-08-04 | Driving module, backlight module and display device |
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| CN (1) | CN215933166U (en) |
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2021
- 2021-08-04 CN CN202121810966.3U patent/CN215933166U/en active Active
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