CN219066408U - Driving circuit of display device and display device - Google Patents
Driving circuit of display device and display device Download PDFInfo
- Publication number
- CN219066408U CN219066408U CN202223439381.2U CN202223439381U CN219066408U CN 219066408 U CN219066408 U CN 219066408U CN 202223439381 U CN202223439381 U CN 202223439381U CN 219066408 U CN219066408 U CN 219066408U
- Authority
- CN
- China
- Prior art keywords
- power supply
- voltage
- row
- display device
- driving module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001105 regulatory effect Effects 0.000 claims description 41
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 14
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 14
- 238000010586 diagram Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
Abstract
The present application relates to a driving circuit of a display device and a display device, the driving circuit of the display device including: the first line driving module is connected with the positive electrode of each red display element, and is used for receiving a first working voltage and providing a first scanning signal for each line of red display elements; the second row driving module is connected with the positive electrode of each green display element and the positive electrode of each blue display element, and is used for receiving a second working voltage and providing a second scanning signal for each row of green display elements and each row of blue display elements; the power supply module is respectively connected with the first row driving module and the second row driving module, and is used for outputting a first working voltage to the first row driving module and outputting a second working voltage to the second row driving module. By using a separate power supply to the red display element, the voltage across the three primary display elements is within a reasonable range, thereby reducing the energy consumption and temperature of the display device.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a driving circuit of a display device and a display device.
Background
The LED display screen uses Light-Emitting-Diode (LED) as basic luminous element (pixel point), and controls the on-off or brightness of each pixel point through a control circuit and a driving circuit, so that the display screen with relevant pixel points can display various information required by people.
However, the LED display screen generally includes LEDs of three colors of red, green and blue, but the three primary LEDs have different conduction voltage drops, the conduction voltage drop of the red LED is generally lower than that of the green LED and the blue LED, in order to give consideration to the operating characteristics of the three primary LEDs, the three primary LEDs are generally powered by 5V voltage, and since the conduction voltage drop of the red LED is lower than that of the blue LED and the green LED, for the purpose of protecting the red LED and the corresponding column driver, a resistor is serially connected between the negative electrode of the red LED and the corresponding column driver to divide a part of voltage and heat, but this increases the loss of useless energy and generates a large amount of heat, thereby increasing the overall temperature of the LED display screen and accelerating the aging of the device.
Disclosure of Invention
Based on this, it is necessary to provide a driving circuit of a display device and a display device for solving the problems that the power consumption and the temperature rise of the display device are caused by the power supply of a single voltage to the display element in the prior art.
In order to achieve the above object, the present application provides a driving circuit of a display device including a plurality of pixel units arranged in rows and columns, each of the pixel units including a red display element, a green display element, and a blue display element, cathodes of the same color display elements located in the same column being connected to each other, the driving circuit of the display device including:
the first row driving module is connected with the positive electrode of each red display element, and is used for receiving a first working voltage and providing a first scanning signal for each row of red display elements;
the second row driving module is connected with the positive electrode of each green display element and the positive electrode of each blue display element, and is used for receiving a second working voltage and providing a second scanning signal for each row of green display elements and each row of blue display elements;
the power supply module is respectively connected with the first row driving module and the second row driving module, and is used for outputting the first working voltage to the first row driving module and outputting the second working voltage to the second row driving module.
In one embodiment, the power module includes:
the power supply device comprises a first switching power supply unit, a second switching power supply unit and a first switching power supply unit, wherein the input end of the first switching power supply unit is used for receiving external alternating current, and the first switching power supply unit is used for outputting a supply voltage according to the external alternating current;
the input end of the first voltage regulating unit is connected with the output end of the first switching power supply unit, and the first voltage regulating unit is used for receiving the power supply voltage and outputting the first working voltage to the first row driving module according to the power supply voltage;
the input end of the second voltage regulating unit is connected with the output end of the first switching power supply unit, and the second voltage regulating unit is used for receiving the power supply voltage and outputting the second working voltage to the second row driving module according to the power supply voltage.
In one embodiment, the supply voltage is greater than the first operating voltage; the first operating voltage is less than or equal to the second operating voltage.
In one embodiment, the first voltage regulating unit and the second voltage regulating unit each comprise a DC/DC circuit.
In one embodiment, the power module includes:
the first output end of the second switching power supply unit is connected with the second row driving module, the input end of the second switching power supply unit is used for receiving external alternating current, and the second switching power supply unit is used for outputting the second working voltage according to the external alternating current;
the input end of the third voltage regulating unit is connected with the second output end of the second switching power supply unit, and the third voltage regulating unit is used for receiving the second working voltage and outputting the first working voltage to the first row driving module according to the second working voltage.
In one embodiment, the third voltage regulating unit comprises a DC/DC circuit.
In one embodiment, the first row driving module includes:
a plurality of first row channels, which are in one-to-one correspondence with the plurality of rows of pixel units;
the positive electrode of each red display element in each row of pixel units is connected to the corresponding first row channel.
In one embodiment, the second row driving module includes:
a plurality of second row channels, which are in one-to-one correspondence with the plurality of rows of pixel units;
the positive electrodes of the green display elements and the positive electrodes of the blue display elements in each row of pixel units are respectively connected to the corresponding second row channels.
In one embodiment, the driving circuit of the display device further includes:
and the column driving module is respectively connected with the cathodes of the display elements with the same color in each column and the power supply module, and is used for receiving the second working voltage and providing column driving signals for the display elements in each column.
The application also provides a display device comprising the driving circuit of the display device.
According to the driving circuit of the display device, the red display elements are independently controlled through the first row driving module, the first working voltage is input to the first row driving module to realize power supply, the green display elements and the blue display elements are controlled through the second row driving module, the second working voltage is input to the second row driving module to realize power supply, and the voltage divided into the three primary color display elements can be in a reasonable range by independently supplying power to the red display elements, so that energy loss and the temperature of the display device can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a driving circuit of a display device according to an embodiment;
FIG. 2 is a second schematic diagram of a driving circuit of a display device according to an embodiment;
FIG. 3 is a third schematic diagram of a driving circuit of the display device according to one embodiment;
FIG. 4 is a schematic diagram of a driving circuit of a display device according to an embodiment;
fig. 5 is a schematic diagram showing a driving circuit of a display device according to an embodiment.
Reference numerals illustrate:
a first row driving module: 100; a second row driving module: 200; and a power supply module: 300; column driving module: 400; a first switching power supply unit: 301; a first voltage regulating unit: 302; and a second pressure regulating unit: 303; a second switching power supply unit: 304; and a third pressure regulating unit: 305; third switching power supply unit: 306. Fourth switching power supply unit: 307. Fifth switching power supply unit: 308.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, in this specification, the term "and/or" includes any and all combinations of the associated listed items.
The application provides a drive circuit of a display device, the display device comprises a plurality of pixel units which are arranged in rows and columns, each pixel unit comprises a red display element, a green display element and a blue display element, and cathodes of the same-color display elements positioned in the same column are connected with each other.
The display elements are light-emitting diodes (LEDs), the LEDs are solid semiconductor devices capable of converting electric energy into visible light, semiconductor wafers in the LEDs are composed of two parts, one part is a P-type semiconductor, the other part is an N-type semiconductor, when the two semiconductors are connected, a PN junction can be formed, when current acts on the wafers through a wire, electrons are pushed to a P area, electrons and holes are combined in the P area, energy is emitted in a photon mode, and the LEDs are lighted. And the red display element, the green display element, and the blue display element may constitute one pixel unit as a display unit of the display device, whereby various colors can be expressed. Further, the plurality of pixel units are arranged in an array to form an LED display module, and the mode of driving the LED display module to work is mainly divided into static driving and scanning driving, wherein the static driving is to connect positive poles of all display elements of each pixel unit to a voltage input end of the LED display module, and connect negative poles of all display elements to a column driving integrated circuit (integrated circuit, IC), and the static driving does not need a row driving IC; the scan driving is to connect the anodes of all display elements of all pixel units in the same row in parallel and electrically connect the anodes of all display elements of all pixel units in the same column in parallel and electrically connect the cathodes of all display elements in the same column in parallel to the column driving IC, and the input voltage applied to the column driving IC can be 4.5V-5V due to a certain voltage drop of the column driving IC, so as to ensure that different areas of the LED display module cannot cause color difference due to the voltage drop problem, but the anodes of all display elements in the same row are connected in parallel, so that the voltages received by all display elements in the same row are the same.
However, the forward voltage drop of the red display element is generally 1.8V to 2.4V, the forward voltage drops of the green display element and the blue display element are generally 2.4V to 3.6V, and for protecting the display element and the column driving IC, a part of voltage and heat are usually separated between the red display element and the column driving IC in a series resistance manner, but the above method increases useless energy loss, and when the design area of the LED display module is larger or the design brightness is higher, the energy lost by the LED display module is also increased, so that on one hand, the energy loss of wires between an external power supply and the LED display module is increased, and on the other hand, thicker power wires are needed to be selected, thereby increasing the cost of the device. Therefore, the application adopts a mode of separately supplying power to the positive electrode of the red display element and the positive electrodes of the green and blue display elements so as to overcome the defect caused by the single voltage input.
Further, referring to fig. 1, the driving circuit of the display device includes a first row driving module 100, a second row driving module 200, and a power module 300.
The first row driving module 100 is connected to the positive electrode of each of the red display elements, and the first row driving module 100 is configured to receive a first operating voltage and provide a first scanning signal to each row of red display elements; the second row driving module 200 is connected to the positive electrode of each of the green display elements and the positive electrode of each of the blue display elements, and the second row driving module 200 is configured to receive a second operating voltage and provide a second scanning signal to each of the green display elements and each of the blue display elements; the power module 300 is connected to the first row driving module 100 and the second row driving module 200, and the power module 300 is configured to output a first operating voltage to the first row driving module 100 and is also configured to output a second operating voltage to the second row driving module 200.
It will be appreciated that fig. 1 shows red display elements as R, green display elements as G, and blue display elements as B, since the forward voltage drop of the red display elements is lower than that of the green display elements and the blue display elements, the first row driving module 100 is used to drive each row of red display elements to operate, and the second row driving module 200 is used to drive each row of green display elements and each row of blue display elements to operate, so that the voltage drop across each display element is within a reasonable range, the resistors connected in series to the cathodes of each column of red display elements can be deleted, and the energy consumption and the temperature of the overall display device can be reduced.
Specifically, the voltage provided by the power module 300 to the first row driving module 100 is defined as the first operating voltage VCC1, alternatively, the first operating voltage VCC1 may be 2.8V to 3.0V, which is in accordance with the forward conduction voltage drop of the red display device during normal operation. The voltage provided by the power module 300 to the second row driving module 200 is defined as the second operating voltage VCC2, alternatively, the second operating voltage VCC2 may be 3.8V to 4.0V, which also corresponds to the forward conduction voltage drop of the green display element and the blue display element during normal operation, so that the anodes of the display elements all receive reasonable voltages, and the design brightness of each display element is about 10% higher than that of the existing single voltage input scheme due to the energy loss and the reduction of the temperature of the display device.
Further, since the scanning driving is implemented by time-sharing lighting of the display elements of different rows, when the first row driving module 100 and the second row driving module 200 receive the row control signal, the row control signal is a periodic square wave signal, which drives the first scanning signal output by the first row driving module 100 to be a periodic signal, only one of the red display elements is driven to be turned on in each period, and drives the second scanning signal output by the second row driving module 200 to be a periodic signal, and also only one of the green and blue display elements is driven to be turned on in each period; by scanning line by line and synchronously converting control signals on each column, a complete picture is seen on the LED display module due to the retention characteristic of human eyes as long as the scanning frequency is fast enough.
In the above example, the red display elements are individually controlled by the first row driving module 100, and the first operating voltage is input to the first row driving module 100 to achieve power supply, the green and blue display elements are controlled by the second row driving module 200, and the second operating voltage is input to the second row driving module 200 to achieve power supply, and the voltage divided into the three primary color display elements can be within a reasonable range by individually powering the red display elements, so that the energy loss and the temperature of the display device can be reduced.
In an embodiment, with continued reference to fig. 1, the first row driving module 100 includes a plurality of first row channels, where the plurality of first row channels are in one-to-one correspondence with the plurality of rows of pixel units, and the positive electrode of each of the red display elements in each row of pixel units is connected to the corresponding first row channel.
As shown in the 4 row by 4 column display matrix of fig. 1, the anodes of all the red display elements in the same row are connected in parallel and electrically connected to one first row channel, and the anodes of the red display elements in different rows need to be connected to different first row channels.
In an embodiment, the second row driving module 200 includes a plurality of second row channels, where the plurality of second row channels are in one-to-one correspondence with the plurality of rows of pixel units, and the positive electrode of each of the green display elements and the positive electrode of each of the blue display elements in each row of pixel units are respectively connected to the corresponding second row channels.
The anodes of all green and blue display elements of the same row are connected in parallel and electrically connected to one second row channel, and the anodes of the green and blue display elements of different rows need to be connected to a different second row channel.
In an embodiment, please continue to refer to fig. 1, the driving circuit of the display device further includes a column driving module 400, and the column driving module 400 is respectively connected to the negative electrode of the display element with the same color in each column and the power module 300, and is configured to receive the second operating voltage and provide a column driving signal to each column of the display elements.
The column driving module 400 includes a plurality of column channels, the plurality of column channels are in one-to-one correspondence with the plurality of columns of pixel units, and cathodes of display elements of the same color in each column of pixel units are respectively connected to the corresponding column channels, and when the first row driving module 100 and the second row driving module 200 receive row control signals to time-division drive the display elements of each row to be turned on, the column driving module 400 receives the column control signals and provides column driving signals to the corresponding display elements according to the column control signals so as to control brightness of the corresponding display elements. Illustratively, in fig. 1, it is assumed that the periods in which the first row driving module 100 and the second row driving module 200 output channel high levels to the anodes of the first, second, third, and fourth rows of display elements are: in the first period, the second period, the third period and the fourth period, if it is desired to light the red display element R of (the second row, the second column) and the blue display element B of (the fourth row, the fourth column), only the column control signal is required to be controlled, so that the column driving module 400 sets the red column channel of the second column to a low level in the second period, sets the blue column channel of the fourth column to a low level in the fourth period, sets the remaining column channels to a high level in the remaining periods, and can realize the lighting of the target display element, and meanwhile, the column driving module 400 can also control the brightness of the target display element according to the control of the driving current and the duty ratio.
In an embodiment, as shown in fig. 2, the power module includes a first switching power supply unit 301, a first voltage regulating unit 302, and a second voltage regulating unit 303, where an input end of the first switching power supply unit 301 is used to receive external ac power, and the first switching power supply unit 301 is used to output a supply voltage according to the external ac power; the input end of the first voltage regulating unit 302 is connected with the output end of the first switching power supply unit 301, and the first voltage regulating unit 302 is used for receiving a power supply voltage and outputting a first working voltage to the first row driving module 100 according to the power supply voltage; the input terminal of the second voltage regulating unit 303 is connected to the output terminal of the first switching power supply unit 301, and the second voltage regulating unit 303 is configured to receive the supply voltage and output a second operating voltage to the second row driving module 200 according to the supply voltage.
It can be understood that the first switching power supply unit 301 includes a first switching power supply, which steps down, rectifies, and filters an external ac power to obtain a dc voltage, and transmits the dc voltage to the output terminal to output the power supply voltage VCC, and the output terminal feeds back the input terminal through the level of the output voltage, so as to achieve the purpose of stabilizing the output power supply voltage. Further, the first switching power supply unit 301 includes two output terminals, one output terminal is connected to the reference ground, the other output terminal is connected to the first voltage regulating unit 302, the first voltage regulating unit 302 converts the input power supply voltage VCC into the first operating voltage VCC1 and supplies power to the first row driving module 100, and the other output terminal of the first switching power supply unit 301 is also connected to the second voltage regulating unit 303, and the second voltage regulating unit 303 converts the input power supply voltage VCC into the second operating voltage VCC2 and supplies power to the second row driving module 200.
In an embodiment, the power supply voltage is greater than the first operating voltage, and the first operating voltage is less than or equal to the second operating voltage.
Optionally, the supply voltage VCC may be 12V, 24V, 36V or 48V, and the first working voltage VCC1 may be 2.8V to 3.0V, and the second working voltage VCC2 may be 3.8V to 4.0V, by setting the supply voltage VCC to be greater than the first working voltage VCC1 and the supply voltage VCC to be greater than the second working voltage VCC2, the supply voltage VCC is input with a high voltage, so that the current becomes small, thereby making the power wire smaller, which is beneficial to saving the device cost, and the voltage drop of the wire will not affect the voltage drop of the display terminal. The first working voltage VCC1 is smaller than or equal to the second working voltage VCC2, so that the forward voltages of the three primary color display elements are respectively in a proper range, and the voltage drop across the display elements is more reasonable.
In an embodiment, the first voltage regulating unit and the second voltage regulating unit each comprise a DC/DC circuit. The DC/DC circuit can convert direct-current voltage with fixed size into adjustable direct-current voltage, and has the characteristics of voltage stabilization, current stabilization, power control and direct-current circuit protection. Based on this, the first voltage regulating unit can stably step down the power supply voltage VCC to the first operating voltage VCC1 using the DC/DC circuit, and the second voltage regulating unit can also stably step down the power supply voltage VCC to the second operating voltage VCC2 using the DC/DC circuit.
In an embodiment, as shown in fig. 3, the power supply module includes a second switching power supply unit 304 and a third voltage regulating unit 305, a first output end of the second switching power supply unit 304 is connected to the second row driving module 200, an input end of the second switching power supply unit 304 is used for receiving external ac power, and the second switching power supply unit 304 is used for outputting a second working voltage according to the external ac power; the input terminal of the third voltage regulating unit 305 is connected to the second output terminal of the second switching power supply unit 304, and the third voltage regulating unit 305 is configured to receive the second operating voltage and output the first operating voltage to the first row driving module 100 according to the second operating voltage.
It can be understood that the second switching power supply unit 304 includes a second switching power supply that converts an external ac power into a dc voltage for output, and the second switching power supply unit 304 includes three output terminals, the first output terminal is connected to the second row driving module 200 to supply the output dc voltage as the second operating voltage VCC2 to the second row driving module 200; the second output terminal is connected to the third voltage regulating unit 305, and the third voltage regulating unit 305 converts the input second working voltage VCC2 into the first working voltage VCC1 and supplies power to the first row driving module 100; the third output is connected to a reference ground. The second operating voltage VCC2 is greater than or equal to the first operating voltage VCC1, alternatively, the first operating voltage VCC1 may be 2.8V to 3.0V, and the second operating voltage VCC2 may be 3.8V to 4.0V. In other embodiments, the third voltage regulating unit includes a DC/DC circuit, and the third voltage regulating unit may stably step down the second operating voltage VCC2 to the first operating voltage VCC1 using the DC/DC circuit.
Based on the change of the internal structure of the power supply module, the sources of the first working voltage VCC1 and the second working voltage VCC2 are changed, but the forward voltage divided on each display element still can meet the respective conduction voltage drop range, thereby effectively reducing useless energy loss, effectively reducing the temperature of the display device under the same condition, selecting thinner power supply wires, reducing the application cost and obviously improving the brightness of the whole device.
In an embodiment, as shown in fig. 4, the power supply module includes a third switching power supply unit 306, the third switching power supply unit 306 is respectively connected to the first row driving module 100 and the second row driving module 200, a first output end of the third switching power supply unit 306 inputs a first operating voltage VCC1 to the first row driving module 100, a second output end of the third switching power supply unit 306 inputs a second operating voltage VCC2 to the second row driving module 200, and a third output end of the third switching power supply unit 306 is connected to a reference ground.
In an embodiment, as shown in fig. 5, the power supply module includes a fourth switching power supply unit 307 and a fifth switching power supply unit 308, wherein the fourth switching power supply unit 307 is connected to the first row driving module 100, a first output terminal of the fourth switching power supply unit 307 inputs a first operating voltage VCC1 to the first row driving module 100, and a second output terminal of the fourth switching power supply unit 307 is connected to a reference ground; the fifth switching power supply unit 308 is connected to the second row driving module 200, the first output terminal of the fifth switching power supply unit 308 inputs the second operating voltage VCC2 to the second row driving module 200, and the second output terminal of the fifth switching power supply unit 308 is connected to the reference ground.
The application also provides a display device comprising the driving circuit of the display device according to the embodiment. Based on the driving circuit of the display device, the display device can obviously improve the brightness of the whole machine, effectively reduce useless energy loss and reduce the temperature of the device.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "ideal embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and for brevity, all of the possible combinations of the technical features of the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A driving circuit of a display device, the display device including a plurality of pixel units arranged in rows and columns, each of the pixel units including a red display element, a green display element, and a blue display element, cathodes of the same color display elements located in the same column being connected to each other, the driving circuit of the display device comprising:
the first row driving module is connected with the positive electrode of each red display element, and is used for receiving a first working voltage and providing a first scanning signal for each row of red display elements;
the second row driving module is connected with the positive electrode of each green display element and the positive electrode of each blue display element, and is used for receiving a second working voltage and providing a second scanning signal for each row of green display elements and each row of blue display elements;
the power supply module is respectively connected with the first row driving module and the second row driving module, and is used for outputting the first working voltage to the first row driving module and outputting the second working voltage to the second row driving module.
2. The driving circuit of the display device according to claim 1, wherein the power supply module includes:
the power supply device comprises a first switching power supply unit, a second switching power supply unit and a first switching power supply unit, wherein the input end of the first switching power supply unit is used for receiving external alternating current, and the first switching power supply unit is used for outputting a supply voltage according to the external alternating current;
the input end of the first voltage regulating unit is connected with the output end of the first switching power supply unit, and the first voltage regulating unit is used for receiving the power supply voltage and outputting the first working voltage to the first row driving module according to the power supply voltage;
the input end of the second voltage regulating unit is connected with the output end of the first switching power supply unit, and the second voltage regulating unit is used for receiving the power supply voltage and outputting the second working voltage to the second row driving module according to the power supply voltage.
3. The drive circuit of a display device according to claim 2, wherein the power supply voltage is greater than the first operation voltage; the first operating voltage is less than or equal to the second operating voltage.
4. A driving circuit of a display device according to claim 3, wherein the first voltage regulating unit and the second voltage regulating unit each comprise a DC/DC circuit.
5. The driving circuit of the display device according to claim 1, wherein the power supply module includes:
the first output end of the second switching power supply unit is connected with the second row driving module, the input end of the second switching power supply unit is used for receiving external alternating current, and the second switching power supply unit is used for outputting the second working voltage according to the external alternating current;
the input end of the third voltage regulating unit is connected with the second output end of the second switching power supply unit, and the third voltage regulating unit is used for receiving the second working voltage and outputting the first working voltage to the first row driving module according to the second working voltage.
6. The driving circuit of a display device according to claim 5, wherein the third voltage adjusting unit includes a DC/DC circuit.
7. The driving circuit of a display device according to claim 1, wherein the first row driving module comprises:
a plurality of first row channels, which are in one-to-one correspondence with the plurality of rows of pixel units;
the positive electrode of each red display element in each row of pixel units is connected to the corresponding first row channel.
8. The driving circuit of a display device according to claim 1, wherein the second row driving module comprises:
a plurality of second row channels, which are in one-to-one correspondence with the plurality of rows of pixel units;
the positive electrodes of the green display elements and the positive electrodes of the blue display elements in each row of pixel units are respectively connected to the corresponding second row channels.
9. The drive circuit of a display device according to any one of claims 1 to 8, wherein the drive circuit of the display device further comprises:
and the column driving module is respectively connected with the cathodes of the display elements with the same color in each column and the power supply module, and is used for receiving the second working voltage and providing column driving signals for the display elements in each column.
10. A display device comprising the drive circuit of the display device according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223439381.2U CN219066408U (en) | 2022-12-21 | 2022-12-21 | Driving circuit of display device and display device |
| PCT/CN2023/123941 WO2024131216A1 (en) | 2022-12-21 | 2023-10-11 | Driving circuit of display apparatus, and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223439381.2U CN219066408U (en) | 2022-12-21 | 2022-12-21 | Driving circuit of display device and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219066408U true CN219066408U (en) | 2023-05-23 |
Family
ID=86371140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223439381.2U Active CN219066408U (en) | 2022-12-21 | 2022-12-21 | Driving circuit of display device and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN219066408U (en) |
| WO (1) | WO2024131216A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024131216A1 (en) * | 2022-12-21 | 2024-06-27 | 深圳雷曼光电科技股份有限公司 | Driving circuit of display apparatus, and display apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101234422B1 (en) * | 2006-05-11 | 2013-02-18 | 엘지디스플레이 주식회사 | Liquid crystal display and method driving for the same |
| CN108109579A (en) * | 2017-12-13 | 2018-06-01 | 杭州视芯科技有限公司 | LED display and its driving method |
| CN110047424A (en) * | 2019-05-05 | 2019-07-23 | 吴达 | A kind of power-economizing method and energy-saving LED display screen of turntable driving LED screen |
| CN212906894U (en) * | 2020-09-18 | 2021-04-06 | 广州视源电子科技股份有限公司 | LED display screen and electronic equipment |
| CN219066408U (en) * | 2022-12-21 | 2023-05-23 | 深圳雷曼光电科技股份有限公司 | Driving circuit of display device and display device |
-
2022
- 2022-12-21 CN CN202223439381.2U patent/CN219066408U/en active Active
-
2023
- 2023-10-11 WO PCT/CN2023/123941 patent/WO2024131216A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024131216A1 (en) * | 2022-12-21 | 2024-06-27 | 深圳雷曼光电科技股份有限公司 | Driving circuit of display apparatus, and display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024131216A1 (en) | 2024-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7714517B2 (en) | LED driver with current sink control and applications of the same | |
| US7649326B2 (en) | Highly efficient series string LED driver with individual LED control | |
| US6618031B1 (en) | Method and apparatus for independent control of brightness and color balance in display and illumination systems | |
| US9336704B2 (en) | Apparatus and method for powering LED driver | |
| US11763735B2 (en) | Image display device | |
| CN219066408U (en) | Driving circuit of display device and display device | |
| US20170011676A1 (en) | Light Emitting Diode Display Device | |
| GB2452210A (en) | Control circuit and method for controlling LEDs | |
| CN110088824A (en) | Light supply apparatus, light emitting device and display device | |
| CN109360526B (en) | LED high efficiency constant current control device | |
| WO2008099979A2 (en) | Apparatus for driving led display panel | |
| CN114420063B (en) | Driving method of LED backlight driving circuit based on low-potential end switch control | |
| US9374859B2 (en) | Lighting interconnection and lighting control module | |
| CN216980093U (en) | Display driving chip and LED lamp panel | |
| CN109377938B (en) | Constant current control device of LED display screen | |
| CN112967686A (en) | Light-emitting structure, display panel, backlight module and display device | |
| CN101894504B (en) | Led display panel and display | |
| US20050128168A1 (en) | Topology for increasing LED driver efficiency | |
| US20210209999A1 (en) | Passive Matrix LED Display Module and Display with Several Passive Matrix LED Display Modules | |
| EP3405007A1 (en) | Light emitting element, driving module for light emitting element | |
| CN214381497U (en) | Digital LED module capable of being randomly connected in series and parallel | |
| CN117174017A (en) | Display screen and driving method | |
| KR100761960B1 (en) | Apparatus for operating high power led using pwm(pulse width modulation) | |
| CN209767860U (en) | LED drive circuit and LED display system | |
| CN113498234B (en) | MOS tube driving circuit and enhanced LED driving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |