A driving circuit and display device

Abstract

The application provides a driving circuit and a display device, and relates to the technical field of circuits.The driving circuit comprises a driving module, a plurality of port groups and light-emitting units of different colors; the light-emitting units are unidirectionally conducted between the port groups; the port groups comprise a plurality of driving ports; the light-emitting units are divided into same-color unit groups and same-lamp unit groups, all the light-emitting units in the same-color unit groups are of the same color and have the same conduction direction, and all the light-emitting units in the same-lamp unit groups are of different colors and have the same conduction direction; between any driving port in any port group and another port group, the same-lamp unit groups and the same-color unit groups with opposite conduction directions are arranged; the driving module is connected with each driving port, and the driving module is used for adjusting the driving ports to output different driving states.The application realizes a multiplexing driving mode for driving a plurality of light-emitting units by using fewer driving ports, so that the number of driving channels can be reduced, the utilization rate of the driving ports can be improved, and the complexity of the driving circuit can be reduced.

Description

Technical Field

[0001] This invention relates to the field of circuit technology, and more specifically, to a driving circuit and a display device. Background Technology

[0002] With the widespread use of indicator lights, decorative lights, and ambient lights in electronic products, full-color LEDs, which can achieve the combination display of multiple colors, are widely used in display screens, transparent screens, stadiums, shopping malls, and other application scenarios. In order to control the brightness and color, it is usually necessary to drive and modulate the three light-emitting units of red, green, and blue separately.

[0003] In related technologies, LED beads are typically driven by driving each RGB light source independently. Each RGB light source is controlled by an independent driving channel, and brightness is adjusted by pulse width modulation. However, when multiple RGB beads need to be driven, this method requires a large number of driving ports and control resources, which leads to increased complexity of the driving circuit, larger chip area, and higher system cost. Summary of the Invention

[0004] The problem addressed by this invention is how to reduce the driving cost of LED display devices.

[0005] To address the above problems, the present invention provides a driving circuit and a display device.

[0006] In a first aspect, the present invention provides a driving circuit, including a driving module, multiple port groups, and light-emitting units of different colors; the light-emitting units are unidirectionally connected between the port groups; the port groups include several driving ports; the light-emitting units are divided into same-color unit groups and same-lamp unit groups, wherein all light-emitting units in the same-color unit group have the same color and the same conduction direction, and all light-emitting units in the same-lamp unit group have different colors and the same conduction direction; between any driving port in any port group and another port group, there are same-lamp unit groups and same-color unit groups with opposite conduction directions; the driving module is connected to each driving port, and the driving module is used to adjust the driving ports to output different driving states.

[0007] Optionally, the port group includes a first port group and a second port group, wherein a plurality of light-emitting units with unidirectional conduction are provided between any driving port in the first port group and any driving port in the second port group, and a plurality of light-emitting units with unidirectional conduction are provided between any driving port in the second port group and any driving port in the first port group.

[0008] Optionally, the same-color unit group derived from the first port group is connected to the same drive port of the second port group, and the same-color unit group derived from the second port group is connected to the same drive port of the first port group.

[0009] Optionally, each light-emitting unit in the same lamp unit group led out from any driving port in the first port group is respectively connected to each driving port in the second port group, and each light-emitting unit in the same lamp unit group led out from any driving port in the second port group is respectively connected to each driving port in the first port group.

[0010] Optionally, the port group includes a first port group, a second port group, and a third port group. Each driving port in the first port group is connected to a plurality of unidirectional light-emitting units between itself and any driving port in the second port group or the third port group. Each driving port in the second port group is connected to a plurality of unidirectional light-emitting units between itself and any driving port in the first port group or the third port group. Each driving port in the third port group is connected to a plurality of unidirectional light-emitting units between itself and any driving port in the first port group or the second port group.

[0011] Optionally, the two same-color unit groups leading out from the first port group are respectively connected to the same driving port of the second port group and the same driving port of the third port group, the two same-color unit groups leading out from the second port group are respectively connected to the same driving port of the first port group and the same driving port of the third port group, and the two same-color unit groups leading out from the third port group are respectively connected to the same driving port of the first port group and the same driving port of the second port group.

[0012] Optionally, each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the first port group is respectively connected to each drive port in the second port group, and each light-emitting unit in another same-lamp unit group is respectively connected to each drive port in the third port group; each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the second port group is respectively connected to each drive port in the first port group, and each light-emitting unit in another same-lamp unit group is respectively connected to each drive port in the third port group; each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the third port group is respectively connected to each drive port in the first port group, and each light-emitting unit in another same-lamp unit group is respectively connected to each drive port in the second port group.

[0013] Optionally, the driving circuit includes N port groups, and any light-emitting unit of the same color leading out from the same port group forms M same-color unit groups. The other end of any same-color unit group is connected to the same driving port in other port groups, M=N-1, and the number of same-light unit groups that the driving module can drive is 3*M*N.

[0014] Optionally, the driving module is used to output multiple driving states to the driving port, including at least high level, low level and high impedance state. The driving module is configured to sequentially form multiple sub-cycles corresponding to the driving states within a driving cycle. The number of sub-cycles within a driving cycle corresponds to the number of port groups.

[0015] Optionally, within any sub-cycle, multiple drive ports in the selected port group output high-level states in sequence according to a preset order, and the lamp unit groups connected to each drive port are turned on in sequence. The remaining drive ports that do not output high-level states are in a high-impedance state, and the drive ports in the unselected port groups output pulse width modulation signals.

[0016] In a second aspect, the present invention provides a display device, including a light-emitting unit and the driving circuit described in the first aspect.

[0017] Optionally, the light-emitting unit includes at least one of a green light-emitting unit, a red light-emitting unit, and a blue light-emitting unit.

[0018] The beneficial effects of the driving circuit of the present invention are as follows: By setting light-emitting units of different colors between port groups and dividing the light-emitting units into same-color unit groups and same-lamp unit groups, wherein the light-emitting units in the same-color unit groups have the same color and the same conduction direction, and the light-emitting units in the same-lamp unit groups have different colors and the same conduction direction, and at the same time, setting same-lamp unit groups and same-color unit groups with opposite conduction directions between any port group and another port group, the light-emitting units form a conduction path with directional constraints between the port groups; by outputting different driving states to each driving port through the driving module, time-division selection of different port groups is realized, so that each same-lamp unit group is selected and conducted sequentially under the corresponding timing sequence, thereby realizing the multiplexing of the light-emitting units, which can reduce the number of driving channels, improve the utilization rate of driving ports and reduce the complexity of driving circuit. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the driving circuit according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the driving module according to an embodiment of the present invention; Figure 3 This is a timing diagram of the driving circuit according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the driving circuit according to an embodiment of the present invention. Figure 2 . Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0021] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0022] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0023] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0024] The names of the messages or information exchanged between the multiple devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0025] like Figure 1 As shown, an embodiment of the present invention provides a driving circuit, including a driving module, multiple port groups, and light-emitting units of different colors; The light-emitting unit is unidirectionally connected between the port groups; The port group includes several driver ports; The light-emitting units are divided into same-color unit groups and same-lamp unit groups. All light-emitting units in the same-color unit group have the same color and the same conduction direction, while all light-emitting units in the same-lamp unit group have different colors and the same conduction direction. Between any drive port in any port group and another port group, there are groups of the same lamp unit and the same color unit with opposite conduction directions; The drive module is connected to each drive port, and the drive module is used to adjust the output of different drive states of the drive ports.

[0026] Specifically, the driving circuit includes a driving module and multiple port groups. For example, driving ports OUTG1, OUTR1, and OUTB1 form a port group (first port group), and driving ports OUTG2, OUTR2, and OUTB2 form a port group (second port group). Light-emitting units (G1~G6, R1~R6, B1~B6) are provided between any driving port in any port group and any driving port in another port group. For example, green light-emitting units (G1, G4) are provided between driving ports OUTG1 and OUTG2, red light-emitting units (R1) and green light-emitting units (G5) are provided between driving ports OUTG1 and OUTR2, and blue light-emitting units (B1) and green light-emitting units (G6) are provided between driving ports OUTG1 and OUTB2, and so on.

[0027] Among them, light-emitting units G1, R1, and B1 are respectively provided between the driving port OUTG1 of the first port group and the driving ports OUTG2, OUTR2, and OUTB2 of the second port group. The light-emitting units G1, R1, and B1 form a group of units with the same lamp. Similarly, the light-emitting units G2, R2, and B2 form a group of units with the same lamp. The light-emitting units G3, R3, and B3 form a group of units with the same lamp. Light-emitting units G1, G2, and G3 are respectively provided between the driving ports OUTG1, OUTR1, and OUTB1 of the first port group and the driving port OUTG2 of the second port group. The light-emitting units G1, G2, and G3 form a group of units with the same color. Similarly, the light-emitting units R1, R2, and R3 form a group of units with the same color. The light-emitting units B1, B2, and B3 form a group of units with the same color.

[0028] In this configuration, the driving port OUTG2 of the second port group and the driving ports OUTG1, OUTR1, and OUTB1 of the first port group are respectively provided with light-emitting units G4, R4, and B4. The light-emitting units G4, R4, and B4 form a group of units with the same lamp. Similarly, the light-emitting units G5, R5, and B5 form a group of units with the same lamp, and the light-emitting units G6, R6, and B6 form a group of units with the same lamp. The driving ports OUTG2, OUTR2, and OUTB2 of the second port group and the driving port OUTG1 of the first port group are respectively provided with light-emitting units G4, G5, and G6. The light-emitting units G4, G5, and G6 form a group of units with the same color. Similarly, the light-emitting units R4, R5, and R6 form a group of units with the same color, and the light-emitting units B4, B5, and B6 form a group of units with the same color.

[0029] As can be seen, the same-lamp unit group composed of light-emitting units G1, B1, and R1 leading from the drive port OUTG1 of the first port group to the drive ports OUTG2, OUTR2, and OUTB2 of the second port group has the opposite conduction direction to the same-color unit group composed of light-emitting units G4, G5, and G6 leading from the drive ports OUTG2, OUTR2, and OUTB2 of the second port group to the drive port OUTG1 of the first port group. The same applies to other same-lamp unit groups and same-color unit groups, which will not be elaborated here. That is, between any drive port of any port group and another drive port, there is at least one same-lamp unit group and at least one same-color unit group with opposite conduction directions.

[0030] In terms of electrical connection, the same color unit group is connected to the same drive port. Therefore, the same color unit group can be understood as an electrical grouping based on the connection relationship of the drive port. Multiple light-emitting units share the same drive channel, thereby reducing the number of drive ports and facilitating unified control of the same color unit group.

[0031] In this context, a group of LED units can be considered as a pixel composed of LEDs of different colors, which typically emit light simultaneously within the same scan cycle.

[0032] Because different colored LEDs use different material systems, their forward conduction voltages vary. Generally, red LEDs have lower forward conduction voltages, green LEDs have intermediate forward conduction voltages, and blue LEDs have higher forward conduction voltages. For example, in one specific embodiment, the forward conduction voltage of the red LED can be approximately 1.5V to 2.5V, the forward conduction voltage of the green LED can be approximately 2V to 3V, and the forward conduction voltage of the blue LED can be approximately 2V to 3V. It should be noted that the above values ​​are only illustrative examples. The forward conduction voltage range may vary for LEDs of different models or with different material systems. This application does not limit this range, and the specific values ​​can be determined based on the parameters of the selected LED device.

[0033] Combination Figure 2 As shown, the driving module includes a pull-up selection circuit, a PWM modulation circuit, and a current control circuit. The pull-up selection circuit selectively connects the driving port to the power supply voltage under the control of the selection control signal to output a high level or form a high impedance state. The PWM modulation circuit controls the on-state of the conduction current according to the pulse width modulation signal when the driving port is selected, thereby adjusting the brightness of the light-emitting unit. The current control circuit limits or adjusts the conduction current (according to the reference current ib) to avoid overcurrent and improve the brightness consistency between the light-emitting units. The driving module is connected to each driving port (OUT(G / R / B)(1 / 2)) to adjust the different driving states output by each driving port, combined with... Figure 3 As shown, the driving states include at least high level, low level and high impedance state. By combining different driving states, the corresponding light-emitting unit is turned on or off, thereby realizing the selection of the light-emitting unit and the brightness adjustment.

[0034] Common scanning drive circuits typically employ row-column scanning or multiplexing driving methods. By placing the light-emitting units between row and column lines, and selecting each row line sequentially while outputting drive signals to the column lines, time-division multiplexing of the light-emitting units is achieved. Alternatively, port multiplexing connects multiple light-emitting units to multiple drive ports, and the conduction of different light-emitting units is achieved by changing the output state of the ports. However, these scanning drive methods usually only rely on the connection relationship of the light-emitting units or the switching of port states for driving. There is no structured grouping relationship between the light-emitting units based on color or emission position, nor is there directional constraint design for the conduction path of the light-emitting units. Therefore, problems such as multi-path conduction, current superposition, or coarse control granularity easily arise during the driving process. Unlike existing scanning drive circuits, this embodiment... For example, by dividing the light-emitting units into groups of units of the same color and groups of units of the same lamp, and constructing a connection structure with opposite conduction directions between the port groups, the light-emitting units form a conduction topology with directional constraints in electrical connection. The group of units of the same color is used to realize the convergence control of light-emitting units of the same color, and the group of units of the same lamp is used to maintain the correspondence between light-emitting units of different colors. Thus, a dual association of color dimension and light-emitting position dimension is established at the structural level. Furthermore, through the cooperation of the above grouping structure and conduction direction, only a controlled conduction path exists at any given time, thereby avoiding the multi-path conduction that may occur in traditional scanning circuits and the resulting voltage drop superposition problem. At the same time, the port groups are time-divisionally selected by the driving module, so that the group of units of the same lamp can be selected sequentially according to a preset order, thereby realizing the orderly multiplexing drive of the light-emitting units.

[0035] In this embodiment, light-emitting units of different colors are set between port groups, and the light-emitting units are divided into same-color unit groups and same-lamp unit groups. The light-emitting units in the same-color unit groups have the same color and the same conduction direction, while the light-emitting units in the same-lamp unit groups have different colors and the same conduction direction. At the same time, same-lamp unit groups and same-color unit groups with opposite conduction directions are set between any port group and another port group, so that the light-emitting units form a conduction path with directional constraints between the port groups. By outputting different drive states to each drive port through the drive module, time-division multiplexing of different port groups is realized, so that each same-lamp unit group is selected and conducted in sequence under the corresponding timing sequence, thereby realizing the multiplexing drive of the light-emitting units, which can reduce the number of drive channels, improve the utilization rate of drive ports, and reduce the complexity of drive circuit. In the traditional full-color LED bead drive circuit, compared with the relatively close existing technology of time-division multiplexing, three pixels, a total of nine LED beads, require two sets of port groups, a total of six ports to achieve drive; while in this embodiment, two sets of port groups, a total of six ports, drive six pixels, a total of eighteen LED beads.

[0036] Optionally, the port group includes a first port group and a second port group, wherein a plurality of light-emitting units with unidirectional conduction are provided between any driving port in the first port group and any driving port in the second port group, and a plurality of light-emitting units with unidirectional conduction are provided between any driving port in the second port group and any driving port in the first port group.

[0037] Specifically, multiple unidirectional light-emitting units are provided between any driving port in the first port group and any driving port in the second port group. For example, OUTG1 (or OUTR1, OUTB1) is provided with unidirectional green light-emitting units (G1 or G2, G3), red light-emitting units (R1 or R2, R3), and blue light-emitting units (B1 or B2, B3) between OUTG2, OUTR2, and OUTB2, respectively. Similarly, multiple unidirectional light-emitting units are provided between any driving port in the second port group and any driving port in the first port group. For example, OUTG2 (or OUTR2, OUTB2) is provided with unidirectional green light-emitting units (G4 or G5, G6), red light-emitting units (R4 or R5, R6), and blue light-emitting units (B4 or B5, B6) between OUTG1, OUTR1, and OUTB1, respectively. This forms a bidirectional connection structure between the two port groups, that is, light-emitting units connected in the forward direction and light-emitting units connected in the reverse direction are respectively provided between the two port groups. By changing the level state of the driving port, light-emitting units in different directions can be selectively lit.

[0038] In this optional embodiment, by setting unidirectional light-emitting units with opposite conduction directions between the first port group and the second port group, and forming a bidirectional current conduction path between the two port groups, the light-emitting units with different conduction directions can be selected by changing the output level state of the driving port. This enables selective driving of different light-emitting units by the same driving port, thereby increasing the number of driveable light-emitting units without increasing the number of driving ports and improving the multiplexing capability of the driving ports.

[0039] Optionally, the same-color unit group derived from the first port group is connected to the same drive port of the second port group, and the same-color unit group derived from the second port group is connected to the same drive port of the first port group.

[0040] Specifically, the same-color unit groups from the first port group are connected to the same driving port of the second port group, and the same-color unit groups from the second port group are connected to the same driving port of the first port group. For example, three green light-emitting units (G1, G2, G3) from the driving ports OUTG1, OUTR1, and OUTB1 of the first port group are connected to OUTG2, and three green light-emitting units (G4, G5, G6) from the driving ports OUTG2, OUTR2, and OUTB2 of the second port group are connected to OUTG1, thereby forming a fixed corresponding connection relationship of the same-color unit groups between the port groups, which facilitates scanning by the driving module.

[0041] In this optional embodiment, by connecting the same color unit group led out from the first port group to the same driving port in the second port group, and connecting the same color unit group led out from the second port group to the same driving port in the first port group, a fixed corresponding connection relationship between the same color unit group and the driving port is established, thereby realizing a fixed mapping relationship between the driving port and the same color unit group and improving the stability of the driving process.

[0042] Optionally, each light-emitting unit in the same lamp unit group led out from any driving port in the first port group is respectively connected to each driving port in the second port group, and each light-emitting unit in the same lamp unit group led out from any driving port in the second port group is respectively connected to each driving port in the first port group.

[0043] Specifically, each light-emitting unit in the same lamp unit group led out from any driving port in the first port group is connected to each driving port in the second port group. For example, light-emitting units G1, R1, and B1 led out from driving port OUTG1 in the first port group are connected to driving ports OUTG2, OUTR2, and OUTB2 in the second port group, respectively. The same applies to other driving ports OUTR1 and OUTB1, which will not be elaborated here. Similarly, each light-emitting unit in the same lamp unit group led out from any driving port in the second port group is connected to each driving port in the first port group. For example, light-emitting units G4, R4, and B4 led out from driving port OUTG2 in the second port group are connected to driving ports OUTG1, OUTR1, and OUTB1 in the first port group, respectively. The same applies to other driving ports OUTR2 and OUTB2, which will not be elaborated here.

[0044] In this optional embodiment, each light-emitting unit in the same lamp unit group led out from any drive port in the same port group is respectively connected to each drive port of another port group, so that the light-emitting units of different colors in the same lamp unit group form a one-to-one distributed correspondence in electrical connection, thereby avoiding the current superposition problem caused by multiple light-emitting units being concentratedly connected to the same drive port. At the same time, each light-emitting unit can participate in the construction of the conduction path under the control of different drive ports, thereby improving the flexibility and controllability of the drive path.

[0045] Optionally, the port group includes a first port group, a second port group, and a third port group. Each driving port in the first port group is connected to a plurality of unidirectional light-emitting units between itself and any driving port in the second port group or the third port group. Each driving port in the second port group is connected to a plurality of unidirectional light-emitting units between itself and any driving port in the first port group or the third port group. Each driving port in the third port group is connected to a plurality of unidirectional light-emitting units between itself and any driving port in the first port group or the second port group.

[0046] Specifically, the port groups include a first port group, a second port group, and a third port group. The first port group includes three driver ports: OUTG1, OUTR1, and OUTB1; the second port group includes three driver ports: OUTG2, OUTR2, and OUTB2; and the third port group includes three driver ports: OUTG3, OUTR3, and OUTB3. Please refer to [link / reference]. Figure 4 In this embodiment, there are 54 LEDs of different colors, which are divided into 18 LED unit groups. They are labeled as the first LED unit group to the eighteenth LED unit group from left to right. Then, the red, green and blue LEDs of the Nth LED unit group can be RN, GN and BN.

[0047] As can be seen, the triggering status of the first lamp unit group R1, G1, and B1 is as follows: when OUTG1 is high, the anode of G1 is pulled high. At this time, if OUTG2 is low, the lamp G1 lights up green. However, we find that there is another path from OUTG1 to OUTG2, namely OUTG1, which returns to OUTG2 through the red lamp R2 and the green lamp G16. This is equivalent to a red lamp and a green lamp connected in parallel next to the green lamp G1. In this example, because the voltage drop from OUTG1 to OUTG2 is clamped by the green lamp G1 when the green lamp G1 is conducting, neither the red lamp R2 nor the green lamp G16 will light up. However, since the conduction voltage drop of the red LED is significantly lower than that of the green and blue LEDs, if two red LEDs are connected in series to form a bypass lamp for the green or blue LED, then it is very likely that the bypass double red lamp will be accidentally lit.

[0048] The above situation occurs when port 1 connects to port 3 via the blue LED, and then connects to the red LED via port 2, connects to the red LED again, and returns to port 3. However, since the basic principle of this driving scheme is that a port in a port group only includes one common-anode unit group with the same LED and one common-cathode unit group with the same color, it is impossible for the bypass port 2 to return to port 3 via the red LED when port 3 is known to have returned to the blue LED. Therefore, the technical solution of this application can eliminate the bypass error caused by the different conduction voltage drops of red, green, and blue LEDs, thus improving the stability of the product.

[0049] Multiple unidirectional light-emitting units are provided between any driving port in the first port group and any driving port in the second port group or the third port group. For example, OUTG1 (or OUTR1, OUTB1) is provided with unidirectional green light-emitting units (G1 or G3, G5), red light-emitting units (R1 or R3, R5), and blue light-emitting units (B1 or B3, B5) between OUTG2, OUTR2, and OUTB2 respectively. OUTG1 (or OUTR1, OUTB1) is provided with unidirectional green light-emitting units (G1 or G3, G5), red light-emitting units (R1 or R3, R5), and blue light-emitting units (B1 or B3, B5) between OUTG1 (or OUTR1, OUTB1) and OUTG3, OUTR3, and OUTB3 respectively. The system includes unidirectional green light-emitting units (G2 or G4, G6), red light-emitting units (R2 or R4, R6), and blue light-emitting units (B2 or B4, B6); multiple unidirectional light-emitting units are provided between any driving port in the second port group and any driving port in the first or third port group. For example, OUTG2 (or OUTR2, OUTB2) is connected to OUTG1, OUTR1, and OUTB1 respectively by unidirectional green light-emitting units (G7 or G9, G11), red light-emitting units (R7 or R9, R11), and blue light-emitting units. The optical unit (B7 or B9, B11), OUTG2 (or OUTR2, OUTB2) is connected to OUTG3, OUTR3, and OUTB3 respectively by unidirectional green light-emitting units (G8 or G10, G12), red light-emitting units (R8 or R10, R12), and blue light-emitting units (B8 or B10, B12); any driving port in the third port group is connected to any driving port in the first port group or the second port group by multiple unidirectional light-emitting units, for example, OUTG3 (or OUTR3, OUTB3) is connected to OUTG3, OUTR3, and OUTB3 respectively. OUTG1, OUTR1, and OUTB1 are connected by unidirectional green light-emitting units (G13 or G15, G17), red light-emitting units (R13 or R15, R17), and blue light-emitting units (B13 or B15, B17). OUTG3 (or OUTR3, OUTB3) is connected to OUTG2, OUTR2, and OUTB2 by unidirectional green light-emitting units (G14 or G16, G18), red light-emitting units (R14 or R16, R18), and blue light-emitting units (B14 or B16, B18).

[0050] In this optional embodiment, by setting unidirectional light-emitting units between the driving ports of any two port groups among the three port groups, a fully interconnected light-emitting unit connection network between the three port groups is constructed, so that any port group can form a light-emitting circuit with the other port groups, realizing a networked driving structure between multiple port groups, thereby improving the flexibility of light-emitting unit connection and enhancing the expansion capability of the display unit.

[0051] Optionally, the two same-color unit groups leading out from the first port group are respectively connected to the same driving port of the second port group and the same driving port of the third port group, the two same-color unit groups leading out from the second port group are respectively connected to the same driving port of the first port group and the same driving port of the third port group, and the two same-color unit groups leading out from the third port group are respectively connected to the same driving port of the first port group and the same driving port of the second port group.

[0052] Specifically, the two color-matching unit groups derived from the first port group are respectively connected to the same driving port of the second port group and the same driving port of the third port group. For example, three green light-emitting units (G1, G3, G5) derived from OUTG1, OUTR1, and OUTB1 are connected to OUTG2, and another three green light-emitting units (G2, G4, G6) derived from OUTG1, OUTR1, and OUTB1 are connected to OUTG3. The connection relationships of other color-matching unit groups are similar and will not be elaborated here. The two color-matching unit groups derived from the second port group are respectively connected to the same driving port of the first port group and the same driving port of the third port group. For example, three green light-emitting units (G7, G9, G1, G2, G3, G4, G5) derived from OUTG2, OUTR2, and OUTB2 are connected to the same driving port of the third port group. 11) Connect to OUTG1. The other three green light-emitting units (G8, G10, G12) leading out from OUTG2, OUTR2, and OUTB2 are connected to OUTG2. The connection relationship of other units of the same color is the same, and will not be repeated here. The two units of the same color leading out from the third port group are respectively connected to the same drive port of the first port group and the same drive port of the second port group. For example, the three green light-emitting units (G13, G15, G17) leading out from OUTG3, OUTR3, and OUTB3 are connected to OUTG1. The other three green light-emitting units (G14, G16, G18) leading out from OUTG3, OUTR3, and OUTB3 are connected to OUTG2. The connection relationship of other units of the same color is the same, and will not be repeated here.

[0053] In this optional embodiment, by connecting the same color unit groups led out from each port group to the driving ports in the remaining port groups, a symmetrical light-emitting unit connection structure is formed between the port groups, thereby making the driving load borne by each driving port more balanced, realizing the balanced distribution of driving current among the driving ports, thereby improving the stability of circuit operation and reducing the risk of overload of a single driving port.

[0054] Optionally, each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the first port group is respectively connected to each drive port in the second port group, and each light-emitting unit in another same-lamp unit group is respectively connected to each drive port in the third port group; each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the second port group is respectively connected to each drive port in the first port group, and each light-emitting unit in another same-lamp unit group is respectively connected to each drive port in the third port group; each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the third port group is respectively connected to each drive port in the first port group, and each light-emitting unit in another same-lamp unit group is respectively connected to each drive port in the second port group.

[0055] Specifically, each light-emitting unit in one lamp-like unit group derived from any drive port in the first port group is connected to a drive port in the second port group, and each light-emitting unit in another lamp-like unit group is connected to a drive port in the third port group. For example, light-emitting units G1, R1, and B1 derived from drive port OUTG1 in the first port group are connected to drive ports OUTG2, OUTR2, and OUTB2 in the second port group, and light-emitting units G2, R2, and B2 derived from drive port OUTG1 in the first port group are connected to drive ports OUTG3, OUTR3, and OUTB3 in the third port group. The same applies to other drive ports OUTR1 and OUTB1. Similarly, each light-emitting unit in one lamp-like unit group derived from any drive port in the second port group is connected to a drive port in the first port group, and each light-emitting unit in another lamp-like unit group is connected to a drive port in the third port group. For example, light-emitting units G7, R7, and B7 derived from drive port OUTG2 in the second port group are connected to a drive port in the third port group. The driving ports OUTG1, OUTR1, and OUTB1 of the first port group are connected to the driving ports OUTG3, OUTR3, and OUTB3 of the third port group via the driving port OUTG2 of the second port group. The same applies to the other driving ports OUTR2 and OUTB2. Each light-emitting unit in one lamp-like unit group derived from any driving port in the third port group is connected to the driving ports of the first port group. Similarly, each light-emitting unit in another lamp-like unit group is connected to the driving ports of the second port group. For example, the light-emitting units G13, R13, and B13 derived from the driving port OUTG3 of the third port group are connected to the driving ports OUTG1, OUTR1, and OUTB1 of the first port group. The light-emitting units G14, R14, and B14 derived from the driving port OUTG3 of the third port group are connected to the driving ports OUTG2, OUTR2, and OUTB2 of the second port group. The same applies to the other driving ports OUTR3 and OUTB3.

[0056] In this optional embodiment, each driving port in each port group leads out multiple lamp unit groups, and each lamp unit group is connected to different other port groups, so that the lamp unit groups form a distributed connection structure among multiple port groups, thereby enabling different light-emitting units to establish multi-path conduction relationships between different port groups. When the driving module switches the sub-cycle, it can switch the port group to achieve the selection of different lamp unit groups, thereby improving the reuse of light-emitting units.

[0057] Optionally, the driving circuit includes N port groups, and any light-emitting unit of the same color leading out from the same port group forms M same-color unit groups. The other end of any same-color unit group is connected to the same driving port in other port groups, M=N-1, and the number of same-light unit groups that the driving module can drive is 3*M*N.

[0058] Specifically, the driving circuit includes N port groups. Any light-emitting unit of the same color drawn from the same port group forms M same-color unit groups, and M=N-1. For example, when N=2, M=1; when N=3, M=2; when N=4, M=3; when N=5, M=4; when N=6, M=5; when N=7, M=6; when N=8, M=7, and so on. Taking N=2 and M=1 as an example, green light-emitting units drawn from the same port group form a same-color unit group, red light-emitting units drawn from the same port group also form a same-color unit group, and blue light-emitting units drawn from the same port group also form a same-color unit group. The other end of each same-color unit group is connected to the same driving port in other port groups. That is, each port group establishes a light-emitting unit connection relationship with all other port groups, thereby forming a multi-port group light-emitting unit connection network structure. When the number of port groups increases, the number of driveable light-emitting units increases significantly.

[0059] In this driving structure, the number of lamp units that the driving circuit can drive is 3*M*N. Of course, 3MN does not mean that the driving structure can only make 3MN of lamp units light up. However, in this structure of the present application, when there are more than 3MN of lamp units, some lamp units will always be lit and dark at the same time. In other words, the number of lamp units that this driving structure can drive independently at the same time is 3MN.

[0060] In this optional embodiment, by expanding the driving circuit to more port groups and dividing the same color light-emitting units led out from the same port group into more same color unit groups and connecting them to the driving ports in other port groups respectively, a light-emitting unit interconnection network structure between multiple port groups is constructed, so that each port group can form a light-emitting loop with all other port groups. This achieves a multiplexed driving structure in which the number of driving ports can be increased linearly and the number of driving light-emitting units can be increased exponentially. This allows more light-emitting units to be driven with a limited number of driving ports, improving the system's scalability and reducing the driving cost per unit light-emitting unit.

[0061] Optionally, the driving module is used to output multiple driving states to the driving port, including at least high level, low level and high impedance state. The driving module is configured to sequentially form multiple sub-cycles corresponding to the driving states within a driving cycle. The number of sub-cycles within a driving cycle corresponds to the number of port groups.

[0062] Specifically, in combination Figure 4 As shown, the driving module is used to output high level, low level and high impedance state to the driving port, and form multiple sub-cycles in one driving cycle (for example, T1-T3 is a sub-cycle, T4-T6 is a sub-cycle). The number of sub-cycles corresponds to the number of port groups. In each sub-cycle, the driving port of one port group outputs high level or high impedance state in sequence to select the light-emitting unit, and the driving ports of other port groups output pulse width modulation signal to control the brightness of the light-emitting unit. Through the cyclic scanning of multiple sub-cycles, the dynamic display of all light-emitting units is realized.

[0063] In this optional embodiment, the driving module outputs high level, low level and high impedance state to each driving port, and forms multiple sub-cycles in sequence according to the number of port groups in one driving cycle, so that each port group is selected in sequence in different sub-cycles and forms a corresponding light-emitting circuit, thereby realizing time-division scanning driving of multiple light-emitting units. This enables the sequential lighting of multiple light-emitting units while reducing the number of driving ports, and improves the multiplexing efficiency of driving ports.

[0064] Optionally, within any sub-cycle, multiple drive ports in the selected port group output high-level states in sequence according to a preset order, and the lamp unit groups connected to each drive port are turned on in sequence. The remaining drive ports that do not output high-level states are in a high-impedance state, and the drive ports in the unselected port groups output pulse width modulation signals.

[0065] Specifically, in combination Figure 3 As shown, within any sub-cycle, multiple drive ports in the selected port group output high-level states sequentially in a preset order, and remain in a high-impedance state during the remaining time periods. For example, drive ports OUTG1, OUTR1, and OUTB1 are in a high-level state during time periods T1, T2, and T3, respectively, and in a high-impedance state during the remaining time periods. Similarly, drive ports OUTG2, OUTR2, and OUTB2 are in a high-level state during time periods T4, T5, and T6, respectively, and in a high-impedance state during the remaining time periods. During the process of multiple drive ports outputting high-level states sequentially, the lamp unit groups connected to each drive port are sequentially selected and turned on, thereby realizing the sequential scanning and lighting of the lamp unit groups. The drive ports in the unselected port groups output pulse width modulation signals to adjust the brightness of the corresponding light-emitting units.

[0066] Understandably, as the number of port groups increases, the corresponding timing diagram changes accordingly. Taking a three-port group as an example, the driving ports OUTG1, OUTR1, and OUTB1 are in a high-level state during time periods T1, T2, and T3, respectively, and in a high-impedance state during the remaining time periods. The driving ports OUTG2, OUTR2, and OUTB2 are in a high-level state during time periods T4, T5, and T6, respectively, and in a high-impedance state during the remaining time periods. Since three sub-cycles are formed within one driving cycle (e.g., T1-T3 is one sub-cycle, T4-T6 is one sub-cycle, and T7-T9 is one sub-cycle), the driving ports OUTG3, OUTR3, and OUTB3 are in a high-level state during time periods T7, T8, and T9, respectively, and in a high-impedance state during the remaining time periods. The same logic applies to more port groups, which will not be elaborated here.

[0067] In this optional embodiment, within any sub-cycle, multiple driving ports in the selected port group output high-level states sequentially according to a preset order, and sequentially turn on the lamp unit groups connected to each driving port, thereby realizing time-division scanning drive based on the lamp unit groups. At the same time, setting the driving ports that do not output high-level states to high-impedance states can avoid the formation of non-target conduction paths and prevent crosstalk or false lighting. In addition, by making the unselected port groups output pulse width modulation signals, the brightness of the corresponding light-emitting units can be adjusted, thereby achieving brightness control while completing the scanning selection. This allows the circuit to achieve stable multiplexing drive and improve the display effect while ensuring the orderly lighting of the light-emitting units.

[0068] An embodiment of the present invention provides a display device, including a light-emitting unit and the aforementioned driving circuit.

[0069] Optionally, the light-emitting unit includes at least one of a green light-emitting unit, a red light-emitting unit, and a blue light-emitting unit.

[0070] Specifically, the light-emitting unit includes a green light-emitting unit, a red light-emitting unit, and a blue light-emitting unit. Every three light-emitting units of different colors (in the same lamp unit group) form a display pixel unit. During the driving process, the driving module simultaneously selects the red, green, and blue light-emitting units in the same display pixel unit within the same sub-cycle, thereby achieving full-color display. By adjusting the duty cycle of the pulse width modulation signal of each color light-emitting unit, mixed color display of different colors and brightness can be achieved.

[0071] In this optional embodiment, by setting the light-emitting unit to include a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit, and by controlling the conduction time or conduction duty cycle of each color light-emitting unit respectively through the driving module, the brightness of different color light-emitting units can be adjusted and colors can be mixed, thereby enabling multi-color display or even full-color display, improving the display effect and functional diversity of the display device.

[0072] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A driving circuit, characterized in that, It includes a driver module, multiple port groups, and light-emitting units of different colors; The light-emitting unit is unidirectionally connected between the port groups; The port group includes several driver ports; The light-emitting units are divided into same-color unit groups and same-lamp unit groups. All light-emitting units in the same-color unit group have the same color and the same conduction direction, while all light-emitting units in the same-lamp unit group have different colors and the same conduction direction. Between any drive port in any port group and another port group, there are groups of the same lamp unit and the same color unit with opposite conduction directions; The drive module is connected to each drive port, and the drive module is used to adjust the output of different drive states of the drive ports.

2. The driving circuit according to claim 1, characterized in that, The port group includes a first port group and a second port group. A plurality of light-emitting units with unidirectional conduction are provided between any driving port in the first port group and any driving port in the second port group. A plurality of light-emitting units with unidirectional conduction are provided between any driving port in the second port group and any driving port in the first port group.

3. The driving circuit according to claim 2, characterized in that, The same color unit group from the first port group is connected to the same drive port of the second port group, and the same color unit group from the second port group is connected to the same drive port of the first port group.

4. The driving circuit according to claim 2, characterized in that, Each light-emitting unit in the same lamp unit group led out from any driving port in the first port group is respectively connected to each driving port in the second port group, and each light-emitting unit in the same lamp unit group led out from any driving port in the second port group is respectively connected to each driving port in the first port group.

5. The driving circuit according to claim 1, characterized in that, The port group includes a first port group, a second port group, and a third port group. Each driving port in the first port group is connected to a driving port in the second port group or the third port group with multiple unidirectional light-emitting units. Each driving port in the second port group is connected to a driving port in the first port group or the third port group with multiple unidirectional light-emitting units. Each driving port in the third port group is connected to a driving port in the first port group or the second port group with multiple unidirectional light-emitting units.

6. The driving circuit according to claim 5, characterized in that, The two same-color unit groups leading out from the first port group are respectively connected to the same driving port of the second port group and the same driving port of the third port group. The two same-color unit groups leading out from the second port group are respectively connected to the same driving port of the first port group and the same driving port of the third port group. The two same-color unit groups leading out from the third port group are respectively connected to the same driving port of the first port group and the same driving port of the second port group.

7. The driving circuit according to claim 5, characterized in that, Each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the first port group is connected to each drive port in the second port group, and each light-emitting unit in another same-lamp unit group is connected to each drive port in the third port group; each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the second port group is connected to each drive port in the first port group, and each light-emitting unit in another same-lamp unit group is connected to each drive port in the third port group; each light-emitting unit in one of the same-lamp unit groups led out from any drive port in the third port group is connected to each drive port in the first port group, and each light-emitting unit in another same-lamp unit group is connected to each drive port in the second port group.

8. The driving circuit according to claim 1, characterized in that, The driving circuit includes N port groups. Any light-emitting unit of the same color led out from the same port group forms M same-color unit groups. The other end of any same-color unit group is connected to the same driving port in other port groups. M=N-1. The number of same-color unit groups that the driving module can drive is 3*M*N.

9. The driving circuit according to claim 1, characterized in that, The driving module is used to output multiple driving states to the driving port, including at least high level, low level and high impedance state. The driving module is configured to sequentially form multiple sub-cycles corresponding to the driving states within a driving cycle. The number of sub-cycles within a driving cycle corresponds to the number of port groups.

10. The driving circuit according to claim 9, characterized in that, In any sub-cycle, multiple drive ports in the selected port group output high-level states in sequence according to a preset order, and the lamp unit groups connected to each drive port are turned on in sequence. The remaining drive ports that do not output high-level states are in a high-impedance state, and the drive ports in the unselected port groups output pulse width modulation signals.

11. A display device, characterized in that, It includes a light-emitting unit and a driving circuit as described in any one of claims 1 to 10.

12. The display device according to claim 11, characterized in that, The light-emitting unit includes at least one of green light-emitting unit, red light-emitting unit, and blue light-emitting unit.

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