Display circuit, display device and stage lighting equipment

Abstract

The utility model belongs to the technical field of display, and provides a display circuit, a display device and stage lighting equipment, a control module provides lighting data, a plurality of driving modules are cascaded, the first driving module is connected with the control module, the driving modules generate multiple paths of driving voltage and constant current control signals according to the received lighting data, and the driving voltage and the constant current control signals are transmitted to the control module. The plurality of switch modules are connected with the plurality of driving modules in a one-to-one correspondence manner, the plurality of light-emitting modules are connected with the plurality of switch modules in a one-to-one correspondence manner, and each switch module receives a plurality of paths of driving voltages and adjusts the brightness and color of the light-emitting module according to the plurality of paths of driving voltages. And the constant-current driving module controls the current flowing through the light-emitting module according to the constant-current control signal, so that the consistency and the stability of the display circuit are improved.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a display circuit, a display device, and a stage lighting equipment. Background Technology

[0002] The downstream market for stage and venue lighting is primarily the live performance market, including large event stages, theaters, and television studios. It is mainly used for creating environments, atmospheres, highlighting central figures, and shaping the stage's spatial and temporal feel, thus defining the external image of the performance. This includes pattern lights, color-changing lights, and beam lights. Throughout its development, the stage and venue lighting industry has faced numerous challenges but has also achieved remarkable success.

[0003] In related technologies, stage dimming effect lights suffer from low efficiency and the need to improve stability. Summary of the Invention

[0004] The purpose of this application is to provide a display circuit, a display device, and a stage lighting equipment, aiming to provide a more efficient and stable stage dimming effect lighting application solution.

[0005] To address the aforementioned technical problems, this application provides a display circuit, which includes:

[0006] The control module is used to provide lighting data;

[0007] Multiple cascaded drive modules are configured, with the first drive module connected to the control module. The drive module is used to generate multiple drive voltage and constant current control signals based on the received lighting data, and to organize the lighting data and forward it to the next-level drive module.

[0008] Multiple switch modules are connected one-to-one with the multiple drive modules;

[0009] Multiple light-emitting modules are connected one-to-one with multiple switching modules. Each switching module receives multiple driving voltages and adjusts the brightness and color of the light-emitting module according to the multiple driving voltages.

[0010] Multiple constant current driving modules are connected to the light-emitting module and the driving module, and are used to receive the constant current control signal and control the current flowing through the light-emitting module according to the constant current control signal.

[0011] In some embodiments, each switching module includes multiple cascaded switching units; each light-emitting module includes multiple cascaded light-emitting units;

[0012] Each of the multiple switching units corresponds one-to-one with a multiple of the multiple light-emitting units, and each light-emitting unit is connected in parallel with the corresponding switching unit;

[0013] The drive module outputs multiple drive voltages to multiple switching units to control the switching state of the multiple switching units.

[0014] In some embodiments, a plurality of light-emitting units are connected in series, and the light-emitting units emit different colors.

[0015] In some embodiments, a plurality of the switching units are connected in series, and the control terminals of the plurality of switching units are respectively connected to a plurality of drive signal terminals of the corresponding drive module.

[0016] In some embodiments, the drive module includes:

[0017] Reference voltage unit, used to provide multiple reference voltages;

[0018] The decoding and storage unit is used to decode the input light data to obtain the corresponding pulse width modulation data.

[0019] A pulse width modulation driving unit, connected to the decoding and storage unit, is used to receive the pulse width modulation data and output multiple pulse width modulation signals according to the pulse width modulation data;

[0020] A level selection unit, connected to the pulse width modulation drive unit and the reference voltage unit, is used to output multiple drive voltages according to the multiple reference voltages and the multiple pulse width modulation signals.

[0021] In some embodiments, the reference voltage unit includes a plurality of voltage divider resistors connected in series between the power supply terminal and the ground terminal to form a voltage divider circuit;

[0022] The first or second terminal of each voltage divider resistor in the voltage divider circuit outputs a corresponding reference voltage.

[0023] In some embodiments, the level selection unit includes a plurality of selection devices, and the plurality of selection devices are connected one-to-one with the plurality of voltage divider resistors;

[0024] Each voltage divider resistor provides a reference voltage for the corresponding selection device, and each selection device selects a corresponding voltage as a drive voltage output based on the received pulse width modulation signal.

[0025] In some embodiments, the selection device is a two-way selector, the two data input terminals of the two-way selector are respectively connected to the first or second terminal of the adjacent voltage divider resistor, the selection input terminal of the two-way selector is connected to the corresponding pulse width modulation signal output terminal in the pulse width modulation driving unit, and the output terminal of the two-way selector is connected to the switching module.

[0026] A second aspect of this application also provides a display device, the display device comprising: a display circuit as described in any of the preceding embodiments.

[0027] A third aspect of this application also provides a stage lighting device, the stage lighting device including: a display circuit as described in any of the above embodiments.

[0028] This application provides a display circuit, display device, and stage lighting equipment. A control module provides lighting data, and multiple drive modules are cascaded. The first drive module is connected to the control module. The drive module generates multiple drive voltages and constant current control signals based on the received lighting data, and then forwards the processed lighting data to the next-level drive module. Multiple switch modules are connected one-to-one with the multiple drive modules, and multiple light-emitting modules are connected one-to-one with the multiple switch modules. Each switch module receives multiple drive voltages and adjusts the brightness and color of the light-emitting module according to these voltages. The constant current drive module controls the current flowing through the light-emitting module according to the constant current control signal, thereby improving the consistency of the display circuit and reducing the number of peripheral components in the lighting dimming system. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 Schematic diagram of the display circuit provided in the embodiments of this application Figure 1 ;

[0031] Figure 2 Schematic diagram of the display circuit provided in the embodiments of this application Figure 2 ;

[0032] Figure 3 Schematic diagram of the display circuit provided in the embodiments of this application Figure 3 ;

[0033] Figure 4 This is a schematic diagram of the driver module provided in an embodiment of this application. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] The downstream market for stage and venue lighting is primarily the live performance market, including large event stages, theaters, and television studios. It's mainly used for creating environment, atmosphere, highlighting central figures, and shaping the stage's spatial and temporal feel, thus defining the external image of the performance. This includes pattern lights, color-changing lights, and beam lights. In related technologies, LED switching significantly interferes with the system power supply, negatively impacting system stability and consistency. The RGBW output port uses PWM to turn on and off; at high refresh rates (16kHz), frequent RGBW switching causes large fluctuations in system current, placing high demands on the system's power supply capacity. Furthermore, some solutions involve numerous system components, resulting in higher costs and lower efficiency and stability.

[0036] To address the aforementioned technical problems, this application provides a display circuit, see [link to relevant documentation]. Figure 1 As shown, the display circuit includes: a control module 100, multiple cascaded drive modules 200, multiple switch modules 300, multiple light-emitting modules 400, and multiple constant current drive modules 500. The control module 100 provides lighting data. The first drive module 200 is connected to the control module 100 and generates multiple drive voltages and constant current control signals based on the received lighting data. It then organizes the lighting data and forwards it to the next-level drive module 200. Multiple switch modules 300 are connected one-to-one with multiple drive modules 200. Multiple light-emitting modules 400 are also connected one-to-one with multiple switch modules 300. Each switch module 300 receives multiple drive voltages and adjusts the brightness and color of the light-emitting module 400 according to these voltages. Multiple constant current drive modules 500 are connected to the light-emitting modules 400 and drive modules 200. Each constant current drive module 500 receives constant current control signals and controls the current flowing through the light-emitting module 400 according to these signals.

[0037] In this embodiment, the display circuit may include multiple display units. Each display unit includes a driving module 200, a switching module 300, a light-emitting module 400, and a constant current driving module 500. The driving module 200 drives the light-emitting module 400 to light up according to the set brightness and color based on the received light data. The driving module 200 in each display unit generates multiple driving voltages and constant current control signals based on the received light data, and forwards the light data to the driving module 200 in the next level display unit, until the last display unit. In each display unit, the switching module 300 is connected to the driving module 200, and the light-emitting module 400 is connected to the switching module 300. The switching module 300 receives multiple driving voltages and adjusts the brightness and color of the light-emitting module 400 according to the multiple driving voltages. The constant current driving module 500 controls the current flowing through the light-emitting module 400 according to the constant current control signal, thereby improving the consistency of the display circuit and reducing the number of peripheral components in the lighting dimming system.

[0038] In some embodiments, the control module 100 can be a zero-code controller, and the lighting data can be zero-code protocol data.

[0039] In some embodiments, the lighting data provided by the control module 100 may also be DMX512 protocol data.

[0040] In some embodiments, the multiple display units may be arranged according to a preset pattern.

[0041] In some embodiments, combined with Figure 2 As shown, each switch module 300 includes multiple cascaded switch units 310; each light-emitting module 400 includes multiple cascaded light-emitting units 410; the multiple switch units 310 correspond one-to-one with the multiple light-emitting units 410, and each light-emitting unit 410 is connected in parallel with the corresponding switch unit 310; the drive module 200 outputs multiple drive voltages to the multiple switch units 310 to control the switching state of the multiple switch units 310.

[0042] In this embodiment, within the same display unit, multiple switching units 310 correspond one-to-one with multiple light-emitting units 410. Each switching unit 310 is connected in parallel with its corresponding light-emitting unit 410, while multiple light-emitting units 410 of different colors are connected in series. Thus, a constant current drive module 500 can be used to control the current flowing through the light-emitting module 400. When the switching unit 310 corresponding to one of the light-emitting units 410 is turned on, that light-emitting unit 410 can be bypassed. By adjusting the switching frequency of its corresponding switching unit 310, the bypass time of the light-emitting unit 410 in each cycle can be adjusted, thereby controlling the current flowing through the light-emitting unit 410. Furthermore, since only one current path flows through the constant current drive module 500, the variation in system current can be reduced, thus reducing the system requirements for stage dimming effect lighting applications.

[0043] In some embodiments, combined with Figure 2 As shown, multiple light-emitting units 410 are connected in series, and the multiple light-emitting units 410 emit different colors.

[0044] In some embodiments, combined with Figure 2 As shown, multiple switch units 310 are connected in series, and the control terminals of the multiple switch units 310 are respectively connected to the multiple drive signal terminals of the corresponding drive module 200.

[0045] In some embodiments, combined with Figure 3 As shown, the switching module 300 includes a first switching transistor Q1, a second switching transistor Q2, a third switching transistor Q3, and a fourth switching transistor Q4. The control terminals of the first switching transistor Q1, the second switching transistor Q2, the third switching transistor Q3, and the fourth switching transistor Q4 are respectively connected to the first driving signal terminal R, the second driving signal terminal G, the third driving signal terminal B, and the fourth driving signal terminal W of the driving module 200. The first terminal of the first switching transistor Q1 is connected to the first power supply terminal VCC via a power line. The second terminal of the first switching transistor Q1 is connected to the first terminal of the second switching transistor Q2. The second terminal of the second switching transistor Q2 is connected to the first terminal of the third switching transistor Q3. The second terminal of the third switching transistor Q3 is connected to the first terminal of the fourth switching transistor Q4. The second terminal of the fourth switching transistor Q4 is connected to the switching terminal D of the constant current driving module 500.

[0046] In some embodiments, combined with Figure 3As shown, the light-emitting module 400 includes a first light-emitting diode RLED, a second light-emitting diode GLED, a third light-emitting diode BLED, and a fourth light-emitting diode WLED. The anode and cathode of the first light-emitting diode RLED are respectively connected to the first and second terminals of the first switching transistor Q1. The anode and cathode of the second light-emitting diode GLED are respectively connected to the first and second terminals of the second switching transistor Q2. The anode and cathode of the third light-emitting diode BLED are respectively connected to the first and second terminals of the third switching transistor Q3. The anode and cathode of the fourth light-emitting diode WLED are respectively connected to the first and second terminals of the fourth switching transistor Q4.

[0047] In some embodiments, combined with Figure 3 As shown, the drive module 200 outputs multiple drive voltages to multiple drive signal terminals (R, G, B, W ports). Each drive voltage controls the duty cycle of the corresponding switching unit 310, thereby controlling the lighting duration of multiple light-emitting units. The brightness of the light-emitting unit 410 is related to its lighting time. Within the same lighting cycle, the lighting duration of each light-emitting unit 410 is determined by the duty cycle of its corresponding switching unit 310.

[0048] In this embodiment, the first light-emitting diode (LED) RLED is connected in parallel with the first switch Q1, the second LED GLED is connected in parallel with the second switch Q2, the third LED BLED is connected in parallel with the third switch Q3, and the fourth LED WLED is connected in parallel with the fourth switch Q4. When the first switch Q1 is on, the first LED RLED is off; when the first switch Q1 is off, the first LED RLED is on. When the second switch Q2 is on, the second LED GLED is off; when the second switch Q2 is off, the second LED GLED is on. When the third switch Q3 is on, the third LED BLED is off; when the third switch Q3 is off, the third LED BLED is on. When the fourth switch Q4 is on, the fourth LED WLED is off; when the fourth switch Q4 is off, the fourth LED WLED is on.

[0049] The switching states of the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 are determined by their gate-source voltages. When their gate-source voltages are greater than the threshold voltage of the switch, the switch is turned on; when their gate-source voltages are less than the threshold voltage of the switch, the switch is turned off.

[0050] In some embodiments, the first light-emitting diode RLED emits red light when lit, the second light-emitting diode GLED emits green light when lit, the third light-emitting diode BLED emits blue light when lit, and the fourth light-emitting diode WLED emits white light when lit.

[0051] In some embodiments, the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 are all N-type MOSFETs.

[0052] In some embodiments, combined with Figure 3 As shown, a first capacitor C1 is also provided between the power supply terminal VDD and the ground terminal GND of the drive module 200. The power supply terminal VDD of the drive module 200 is connected to the first power supply terminal CC, and the ground terminal GND of the drive module 200 is grounded. The pulse width modulation signal terminal PWM of the drive module 200 is connected to the pulse width modulation signal terminal PWM of the constant current drive module 500, and the data output terminal DOUT of the drive module 200 is connected to the data input terminal DIN of the next stage drive module 200. The data input terminal DIN of the first stage drive module 200 is connected to the data output terminal DATA of the control module 100, and the ground terminal GND of the control module 100 and the constant current drive module 500 are both grounded.

[0053] In some embodiments, the lighting data is zero-return code protocol data.

[0054] In some embodiments, combined with Figure 4 As shown, the driving module 200 includes: a reference voltage unit 210, a decoding and storage unit 220, a pulse width modulation (PWM) driving unit 230, and a level selection unit 240. The reference voltage unit 210 provides multiple reference voltages. The decoding and storage unit 220 decodes the input light data to obtain corresponding PWM data. The PWM driving unit 230 is connected to the decoding and storage unit 220 and receives the PWM data, outputting multiple PWM signals based on the PWM data. The level selection unit 240 is connected to the PWM driving unit 230 and the reference voltage unit 210, and outputs multiple driving voltages based on the multiple reference voltages and the multiple PWM signals.

[0055] In this embodiment, the data input terminal DIN of the drive module 200 inputs light data. The decoding and storage unit 220 samples and decodes the input light data to obtain the pulse width modulation data (PWM data) required by the drive module 200. After storage, it is provided to the pulse width modulation drive unit 230. The pulse width modulation drive unit 230 converts the pulse width modulation data into corresponding multi-channel pulse width modulation signals. The level selection unit 240 is used to control the voltage of multiple drive signal terminals (R, G, B, W ports) according to the multi-channel reference voltage and the multi-channel pulse width modulation signals, thereby outputting multi-channel drive voltage. In this embodiment, the driving module 200 can be integrated into the driving chip. The display circuit using this driving module 200 only requires one driving chip, four switching units 310 (e.g., four N-type MOSFETs), one constant current driving module 500 (e.g., a constant current driving chip Hi7002), and four light-emitting units 410 (e.g., four LEDs of different colors), which simplifies the peripheral components and reduces the system cost. In specific application scenarios, the LEDs and N-type MOSFETs are connected in parallel, and different LEDs are connected in series. The current is controlled by a single Hi7002 constant current driving chip, which improves system consistency.

[0056] In some embodiments, the level selection unit 240 can be a bootstrap circuit, which outputs multiple driving voltages based on multiple reference voltages and multiple pulse width modulation signals.

[0057] In some specific application embodiments, combined with Figure 3 As shown, the RGBW port of the driver chip controls the gate of the N-type MOSFET. Either the N-type MOSFET outputs and the LED is off, or the N-type MOSFET is off and the LED is on. This ensures that during system application, there is only one current path flowing through the constant current driver chip Hi7002, reducing the variation in system current and reducing the system requirements for stage dimming effect light applications.

[0058] In some embodiments, the constant current drive module 500 can be a constant current drive chip, and the model of the constant current drive chip can be Hi7002.

[0059] In some embodiments, the PWM dimming pin of the constant current drive chip is connected to the pulse width modulation signal terminal PWM of the drive module 200, and the drain pin of the built-in power MOS transistor of the constant current drive chip is connected to the negative terminal of the light-emitting module 400.

[0060] In some embodiments, the switching terminal D of the constant current driving module 500 is grounded through the drain and source of its internal NMOS transistor, and then through the ground terminal GND of the constant current driving module 500. By controlling the switching duty cycle of its internal NMOS transistor, the constant current driving module 500 can reduce the change in system current and reduce the system requirements of the stage dimming effect light application scheme by controlling the current flowing through the light-emitting module 400.

[0061] In some embodiments, combined with Figure 4 As shown, the driver module 200 also includes a forwarding unit 250, which organizes and forwards the zero-code data input at the data input terminal DIN to the data output terminal DOUT, providing it for sampling by the subsequent cascaded driver modules 200.

[0062] In some embodiments, the drive module 200 further includes a clamping unit, which can clamp the voltage of the power supply terminal VDD of the drive module 200, thereby clamping the voltage of the power supply terminal VDD of the drive module 200 within a preset voltage range, and avoiding the problem that the drive voltage output by the drive module 200 is unstable due to large fluctuations in the voltage of the power supply terminal VDD of the drive module 200.

[0063] In some embodiments, the driver module 200 further includes a power-on reset unit, which can control the reset operation of the driver module 200 (i.e., the driver chip) by detecting the power supply terminal VDD of the driver module 200. When the power supply terminal VDD of the driver module 200 reaches a set threshold, the power-on reset unit outputs a reset signal, which initializes all registers and internal states of the driver chip to their default values, ensuring that the system enters a known and reliable state, keeping the driver chip static until the power supply voltage of the driver chip reaches the threshold for normal operation.

[0064] In some embodiments, the driving module 200 further includes an oscillation unit that can generate a stable frequency signal. This frequency signal can be used as a clock signal for the driving chip to adjust the operating frequency and speed of each functional module within the driving chip, thereby improving signal matching and signal processing accuracy between the various functional modules within the driving chip.

[0065] In some embodiments, the reference voltage unit 210 includes a plurality of voltage divider resistors connected in series with the power supply terminal VDD and the ground GND to form a voltage divider circuit; the first or second terminal of each voltage divider resistor in the voltage divider circuit outputs a corresponding reference voltage.

[0066] In some embodiments, combined with Figure 4As shown, the reference voltage unit 210 includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. The first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 form a voltage divider circuit. Its output terminals (the fifth terminal V0, the fourth terminal V5, the third terminal V10, the second terminal V15, and the first terminal V20) are respectively connected to multiple selection devices of the level selection unit 240 to provide input voltage to the multiple selection devices.

[0067] In some embodiments, the level selection unit 240 includes a plurality of selection devices, which are connected one-to-one with a plurality of voltage divider resistors; each voltage divider resistor provides a reference voltage for the corresponding selection device, and each selection device selects a corresponding voltage as a driving voltage output according to the received pulse width modulation signal.

[0068] In some embodiments, combined with Figure 4 As shown, the level selection unit 240 includes a first selection device M1, a second selection device M2, a third selection device M3, and a fourth selection device M4. The selection terminals of the first selection device M1, the second selection device M2, the third selection device M3, and the fourth selection device M4 are respectively connected to the four pulse width modulation signal terminals of the pulse width modulation drive unit 230. The output terminals of the first selection device M1, the second selection device M2, the third selection device M3, and the fourth selection device M4 are respectively connected to the multiple drive signal terminals (R, G, B, W ports) of the drive module 200.

[0069] In this embodiment, the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 form a voltage divider circuit. The first terminal of the first resistor R1 serves as the first terminal V20 of the voltage divider circuit. The first input terminal A of the first selection device M1 is connected to the first terminal V20. The second terminal of the first resistor R1 is connected to the first terminal of the second resistor R2, serving as the second terminal V15 of the voltage divider circuit. The second input terminal B of the first selection device M1 is connected to the second terminal V15 of the voltage divider circuit. The second terminal of the second resistor R2 is connected to the first terminal of the third resistor R3, serving as the third terminal V10 of the voltage divider circuit. The first input terminal A of the second selection device M2 is connected to the second terminal V15 of the voltage divider circuit. The second input terminal B of the second selection device M2 is connected to the third terminal V10 of the voltage divider circuit. The second terminal of the third resistor R3 is connected to the first terminal of the fourth resistor R4, serving as the fourth terminal V5 of the voltage divider circuit. The first input terminal A of the third selection device M3 is connected to the third terminal V10 of the voltage divider circuit. The second input terminal B of the third selection device M3 is connected to the fourth terminal V5 of the voltage divider circuit. The second terminal of the fourth resistor R4 serves as the fifth terminal V0 of the voltage divider circuit. The first input terminal A of the fourth selection device M4 is connected to the fourth terminal V5 of the voltage divider circuit, and the second input terminal B of the fourth selection device M4 is connected to the fifth terminal V0 of the voltage divider circuit. The first selection device M1, the second selection device M2, the third selection device M3, and the fourth selection device M4 are connected to their output terminal Y according to the level selector's first input terminal A or second input terminal B of their selection terminal S, thereby outputting corresponding drive voltages to multiple drive signal terminals (R, G, B, W ports) to control the opening and closing of the external switching unit 310.

[0070] In this embodiment, by setting a first selection device M1, a second selection device M2, a third selection device M3, and a fourth selection device M4 to be respectively connected to the four pulse width modulation signal terminals of the pulse width modulation drive unit 230, each selection device M1 selects the corresponding voltage output to the drive signal terminal according to the pulse width modulation signal it receives, thereby providing the corresponding drive voltage for the subsequent switching unit 310. In this way, the drive circuit of the power device in the switching unit 310 is simplified, the system cost is reduced, and the system stability is improved.

[0071] In some embodiments, the reference voltage unit 210 includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, all of which may have the same resistance value. The first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 form a voltage divider circuit. The voltage divider circuit can perform equal voltage division processing on the voltage between the power supply terminal VDD and the ground GND, thereby outputting a reference voltage with equal differences. The voltage values ​​of the first terminal V20, the second terminal V15, the third terminal V10, the fourth terminal V5, and the fifth terminal V0 of the voltage divider circuit are set with equal differences.

[0072] In some embodiments, the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 can be adjustable resistors.

[0073] In this embodiment, by setting the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 as adjustable resistors, the voltage division ratio of the voltage divider circuit can be flexibly adjusted. The voltage values ​​of the first terminal V20, the second terminal V15, the third terminal V10, the fourth terminal V5, and the fifth terminal V0 of the voltage divider circuit can be set according to the application scenario of the display circuit.

[0074] In some embodiments, the selection device is a two-way selector. The two data input terminals of the two-way selector are respectively connected to the first or second terminal of an adjacent voltage divider resistor. The selection input terminal of the two-way selector is connected to the corresponding pulse width modulation signal output terminal in the pulse width modulation driving unit 230. The output terminal of the two-way selector is connected to the switching module 300.

[0075] This application also provides a display device, which includes a display circuit as described in any of the above embodiments.

[0076] In this embodiment, the control module 100 forwards the lighting data provided by the host computer to the drive module 200. Multiple display units in the display circuit are set according to a preset pattern and display the corresponding pattern to the user when lit. Multiple drive modules 200 in the display circuit are cascaded. The first drive module 200 is connected to the control module 100. The drive module 200 generates multiple drive voltages and constant current control signals according to the received lighting data, and forwards the lighting data to the next level drive module 200 after processing. Multiple switch modules 300 are connected to multiple drive modules 200 one by one, and multiple light-emitting modules 400 are connected to multiple switch modules 300 one by one. Each switch module 300 receives multiple drive voltages and adjusts the brightness and color of the light-emitting module 400 according to the multiple drive voltages. The constant current drive module 500 controls the current flowing through the light-emitting module 400 according to the constant current control signal, thereby improving the consistency of the display circuit and reducing the number of peripheral components in the lighting dimming system.

[0077] This application also provides a stage lighting device, which includes a display circuit as described in any of the above embodiments.

[0078] In this embodiment, the driving module 200 in the stage lighting equipment can be integrated into the driving chip. Therefore, only one chip, four N-type MOSFETs, one constant current driving chip (e.g., a Hi7002 constant current driving chip), and four light-emitting diodes are needed to form a display unit within the display device, simplifying peripheral components and reducing system costs. Furthermore, the light-emitting diodes and N-type MOSFETs are connected in parallel, and different light-emitting diodes are connected in series. The current is controlled by a single Hi7002 constant current driving chip, improving the consistency of the display device. Multiple driving signal terminals of the driving chip (e.g., Figure 3 The R, G, B, and W ports control the gate of the N-type MOSFET. Either the output LED of the N-type MOSFET is turned off, or the LED is turned on when the N-type MOSFET is turned off. This ensures that there is only one current path flowing through the constant current path of the Hi7002 during system application, reducing the variation of system current and reducing the system requirements of stage dimming effect light application solutions.

[0079] In this application, it is understood that the description of rows and columns is determined based on the relative positions of the pressure sensing points, and it is only one way of describing orientation. In other embodiments, rows can also be equivalent to columns in this application, and columns can also be equivalent to rows in this application. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0080] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A display circuit, characterized in that, The display circuit includes: The control module is used to provide lighting data; Multiple cascaded drive modules are configured, with the first drive module connected to the control module. The drive module is used to generate multiple drive voltage and constant current control signals based on the received lighting data, and to organize the lighting data and forward it to the next-level drive module. Multiple switch modules are connected one-to-one with the multiple drive modules; Multiple light-emitting modules are connected one-to-one with multiple switching modules. Each switching module receives multiple driving voltages and adjusts the brightness and color of the light-emitting module according to the multiple driving voltages. Multiple constant current driving modules are connected to the light-emitting module and the driving module, and are used to receive the constant current control signal and control the current flowing through the light-emitting module according to the constant current control signal.

2. The display circuit as described in claim 1, characterized in that, Each switching module includes multiple cascaded switching units; each light-emitting module includes multiple cascaded light-emitting units. Each of the multiple switching units corresponds one-to-one with a multiple of the multiple light-emitting units, and each light-emitting unit is connected in parallel with the corresponding switching unit; The drive module outputs multiple drive voltages to multiple switching units to control the switching state of the multiple switching units.

3. The display circuit as described in claim 2, characterized in that, Multiple light-emitting units are connected in series, and the multiple light-emitting units emit different colors.

4. The display circuit as described in claim 2, characterized in that, Multiple switching units are connected in series, and the control terminals of the multiple switching units are respectively connected to multiple drive signal terminals of the corresponding drive module.

5. The display circuit as described in claim 1, characterized in that, The driving module includes: Reference voltage unit, used to provide multiple reference voltages; The decoding and storage unit is used to decode the input light data to obtain the corresponding pulse width modulation data. A pulse width modulation driving unit, connected to the decoding and storage unit, is used to receive the pulse width modulation data and output multiple pulse width modulation signals according to the pulse width modulation data; A level selection unit, connected to the pulse width modulation drive unit and the reference voltage unit, is used to output multiple drive voltages according to the multiple reference voltages and the multiple pulse width modulation signals.

6. The display circuit as described in claim 5, characterized in that, The reference voltage unit includes multiple voltage divider resistors, which are connected in series between the power supply terminal and the ground terminal to form a voltage divider circuit. The first or second terminal of each voltage divider resistor in the voltage divider circuit outputs a corresponding reference voltage.

7. The display circuit as described in claim 6, characterized in that, The level selection unit includes multiple selection devices, and each of the multiple selection devices is connected to a corresponding voltage divider resistor; Each voltage divider resistor provides a reference voltage for the corresponding selection device, and each selection device selects a corresponding voltage as a drive voltage output based on the received pulse width modulation signal.

8. The display circuit as described in claim 7, characterized in that, The selection device is a two-way selector. The two data input terminals of the two-way selector are respectively connected to the first or second terminal of the adjacent voltage divider resistor. The selection input terminal of the two-way selector is connected to the corresponding pulse width modulation signal output terminal in the pulse width modulation driving unit. The output terminal of the two-way selector is connected to the switching module.

9. A display device, characterized in that, The display device includes: a display circuit as described in any one of claims 1-8.

10. A stage lighting device, characterized in that, The stage lighting equipment includes: a display circuit as described in any one of claims 1-8.

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