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CN-121999709-A - Driving unit, driving chip and display device

CN121999709ACN 121999709 ACN121999709 ACN 121999709ACN-121999709-A

Abstract

The embodiment of the invention provides a driving unit, a driving chip and a display device, and relates to the technical field of display. The driving unit controls the load conduction speed through the driving module. The driving unit comprises a first driving module, a switching module and a logic control module, wherein a first input end of the first driving module is electrically connected with a reference voltage end, a control end of the switching module is electrically connected with an output end of the first driving module, a first end of the switching module is electrically connected with a second input end of the first driving module, a second end of the switching module is electrically connected with a power supply end, a third end of the switching module is electrically connected with a load, a first output end of the logic control module is electrically connected with the control end of the first driving module, the first input end of the logic control module is electrically connected with a fourth end of the switching module, and the logic control module is configured to detect the current in the switching module and generate a corresponding adjusting coefficient according to the current, and output the adjusting coefficient to the first driving module.

Inventors

  • XING YIFAN
  • WANG HUORONG

Assignees

  • 钛铂思科技(上海)有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (14)

  1. 1. A drive unit, comprising: the first input end of the first driving module is electrically connected with the reference voltage end; The control end of the switch module is electrically connected with the output end of the first driving module, and the first end of the switch module is electrically connected with the second input end of the first driving module; The first output end of the logic control module is electrically connected with the control end of the first driving module, and the first input end of the logic control module is electrically connected with the fourth end of the switch module; the first driving module is configured to control the switch module to be turned on or off; The logic control module is configured to detect the current in the switch module, generate a corresponding adjustment coefficient according to the current, and output the adjustment coefficient to the first driving module, wherein the adjustment coefficient is used for adjusting the driving capability of the first driving module, and the driving capability of the first driving module is related to the speed of opening or closing the switch module.
  2. 2. The drive unit of claim 1, wherein the first drive module comprises an operational amplifier; The first input end of the operational amplifier is the first input end of the first driving module, the second input end of the operational amplifier is the second input end of the first driving module, the output end of the operational amplifier is the output end of the first driving module, and the control end of the operational amplifier is electrically connected with the control end of the first driving module.
  3. 3. The drive unit of claim 2, wherein the operational amplifier comprises a plurality of first transistors and a plurality of second transistors, wherein the plurality of first transistors are connected in parallel and the plurality of second transistors are connected in parallel; The control end of the first transistor is electrically connected with the first control end of the operational amplifier, the first end of the first transistor is electrically connected with the second end of the second transistor, and the second end of the first transistor is electrically connected with the grounding end; The control end of the second transistor is electrically connected with the second control end of the operational amplifier, and the first end of the second transistor is electrically connected with the voltage end; The logic control module is configured to adjust the number of on or off states of the first transistor and the second transistor, wherein the driving capability of the first driving module refers to the number of on or off states of the first transistor and the second transistor; the control end of the second transistor is electrically connected with the first control end of the operational amplifier.
  4. 4. The driving unit according to claim 3, wherein the operational amplifier further comprises a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, and a seventh transistor; The control end of the third transistor is electrically connected with the first input end of the operational amplifier, the first end of the third transistor is electrically connected with the second end of the seventh transistor, the second end of the third transistor is electrically connected with the first end of the fifth transistor, and the control ends of the fifth transistor and the sixth transistor are also electrically connected; The control end of the fourth transistor is electrically connected with the second input end of the operational amplifier, the first end of the fourth transistor is electrically connected with the second end of the seventh transistor, the second end of the fourth transistor is electrically connected with the first end of the sixth transistor, and the second end of the fourth transistor is also electrically connected with the control end of the first transistor; The second end of the fifth transistor is electrically connected with the grounding end, the second end of the sixth transistor is electrically connected with the grounding end, and the first end of the seventh transistor is electrically connected with the voltage end.
  5. 5. The drive unit of claim 1, wherein the switch module comprises: an eighth transistor, wherein a control end of the eighth transistor is a control end of the switch module, a first end of the eighth transistor is a first end of the switch module, and a second end of the eighth transistor is a third end of the switch module; The switch module comprises a switch module, a current source, a third end of the current source and a fourth end of the switch module, wherein the first end of the current source is the second end of the switch module; the logic control module is configured to collect current data of the current source.
  6. 6. The drive unit according to any one of claims 1 to 4, wherein the logic control module includes: a first control module; The first input end of the second control module is electrically connected with the first output end of the first control module, the second input end of the second control module is the first input end of the logic control module, and the first output end of the second control module is the first output end of the logic control module; The driving unit further comprises a second driving module, wherein the control end of the second driving module is electrically connected with the second output end of the second control module, the first end of the second driving module is electrically connected with the control end of the switch module, and the second end of the second driving module is electrically connected with the grounding end; the second driving module is configured to control on or off of the switching module; the first control module is configured to output an N-bit digital control code to the second control module, and the second control module is configured to convert the N-bit digital control code into an adjustment coefficient; the adjusting coefficient is used for adjusting the driving capability of the second driving module, and the driving capability of the second driving module is related to the on-off speed of the switch module.
  7. 7. The drive unit of claim 6, wherein the second drive module comprises a plurality of ninth transistors connected in parallel; The control end of the ninth transistor is electrically connected with the control end of the second driving module, the first end of the ninth transistor is electrically connected with the first end of the second driving module, and the second end of the ninth transistor is electrically connected with the second end of the second driving module; The adjustment coefficient is in a second range, and the second control module is configured to adjust the number of on or off states of the first transistor, the second transistor and the ninth transistor, wherein the driving capability of the second driving module refers to the number of on or off states of the ninth transistor.
  8. 8. The drive unit of claim 7, further comprising a third drive module, wherein a control terminal of the third drive module is electrically connected to a third output terminal of the second control module, wherein a first terminal of the third drive module is electrically connected to the voltage terminal, and wherein a second terminal of the third drive module is electrically connected to a third terminal of the switch module; the third drive module is configured to charge the load; The adjusting coefficient is also used for adjusting the driving capability of the third driving module, and the driving capability of the third driving module is indirectly related to the on-off speed of the switch module.
  9. 9. The drive unit of claim 8, wherein the third drive module comprises a plurality of tenth transistors connected in parallel; The control end of the tenth transistor is electrically connected with the control end of the third driving module, the first end of the tenth transistor is electrically connected with the first end of the third driving module, and the second end of the tenth transistor is electrically connected with the second end of the third driving module; The adjustment coefficient is in a third range, and the second control module is configured to adjust the number of on or off states of the ninth transistor and the tenth transistor, wherein the driving capability of the third driving module refers to the number of on or off states of the tenth transistor.
  10. 10. A drive unit according to claim 3, wherein the logic control module comprises: a first control module; The first input end of the second control module is electrically connected with the first output end of the first control module, the second input end of the second control module is the first input end of the logic control module, and the first output end of the second control module is the first output end of the logic control module; The driving unit further comprises a third driving module, wherein the control end of the third driving module is electrically connected with the third output end of the second control module, the first end of the third driving module is electrically connected with the voltage end, and the second end of the third driving module is electrically connected with the third end of the switch module; the third drive module is configured to charge the load; the first control module is configured to output an N-bit digital control code to the second control module, and the second control module is configured to convert the N-bit digital control code into an adjustment coefficient; the adjusting coefficient is used for adjusting the driving capability of the third driving module, and the driving capability of the third driving module is indirectly related to the on-off speed of the switch module.
  11. 11. The drive unit of claim 10, wherein the third drive module comprises a plurality of tenth transistors connected in parallel; The control end of the tenth transistor is electrically connected with the control end of the third driving module, the first end of the tenth transistor is electrically connected with the first end of the third driving module, and the second end of the tenth transistor is electrically connected with the second end of the third driving module; The adjustment coefficient is in a third range, and the second control module is configured to adjust the number of on or off states of the first transistor, the second transistor and the tenth transistor, wherein the driving capability of the third driving module refers to the number of on or off states of the tenth transistor.
  12. 12. A driver chip comprising a plurality of driver units according to any one of claims 1-11.
  13. 13. A display device, characterized in that the display device comprises: At least one driver chip as claimed in claim 12; The LED lamp comprises a lamp panel, wherein the lamp panel is provided with a plurality of rows of LEDs, and the driving units are correspondingly connected with the plurality of rows of LEDs, wherein the LEDs serve as loads.
  14. 14. The display device of claim 13, wherein the load further comprises a first capacitor, wherein the positive electrode of the light emitting diode is electrically connected to the third terminal of the switch module, wherein the negative electrode of the light emitting diode is electrically connected to the ground terminal, and wherein the first capacitor is connected in parallel with the light emitting diode; In case the driving unit comprises a third driving module, the third driving module charges the first capacitor.

Description

Driving unit, driving chip and display device Technical Field The present invention relates to the field of display technologies, and in particular, to a driving unit, a driving chip, and a display device. Background Many driver chips in LED display technology use pulse width modulation (Pulse Width Modulation, PWM) modulation to drive a display of multiple LED light groups. In order to improve the gray scale of the LED lamp, the PWM adjustment width needs finer adjustment capability, so the PWM adjustment frequency gradually increases. The switching speed of the channel in high frequency display affects the application of PWM in high frequency regulation, and increasing driving capability, such as op amp SR regulation, is currently commonly used in driving chips to increase the opening speed of the channel. However, in practical use, the requirements on the opening speed of the channel are not consistent under different current gears, and different lamps have different characteristics. Disclosure of Invention The embodiment of the invention provides a driving unit, a driving chip and a display device. In a first aspect, some embodiments of the present application provide a driving unit, where the driving unit includes a first driving module, a switching module, and a logic control module, where a first input end of the first driving module is electrically connected to a reference voltage end, a control end of the switching module is electrically connected to an output end of the first driving module, a first end of the switching module is electrically connected to a second input end of the first driving module, a second end of the switching module is electrically connected to a power supply end, a third end of the switching module is electrically connected to a load, a first output end of the logic control module is electrically connected to a control end of the first driving module, a first input end of the logic control module is electrically connected to a fourth end of the switching module, the first driving module is configured to control the switching module to be turned on or off, the logic control module is configured to detect a current level in the switching module, and generate a corresponding adjustment coefficient according to the current level, and output the adjustment coefficient to the first driving module, the adjustment coefficient is used to adjust a driving capacity of the first driving module, and the driving capacity of the first driving module is turned on or off. Based on the above scheme, some embodiments of the present application provide a driving unit, where the driving unit detects the current in the switch module in real time through the logic control module, generates different adjustment coefficients through different currents, and transmits the adjustment coefficients to the first driving module, where the first driving module receives the adjustment coefficients to control its driving capability, so as to control the on or off speed of the switch module, so that the on speed of the switch module can be adjusted by using a current gear, so that the on speed is consistent, and user experience can be further enhanced in practical application. In some embodiments, the first driving module comprises an operational amplifier, wherein a first input end of the operational amplifier is a first input end of the first driving module, a second input end of the operational amplifier is a second input end of the first driving module, an output end of the operational amplifier is an output end of the first driving module, and a control end of the operational amplifier is electrically connected with a control end of the first driving module. In some embodiments, the operational amplifier comprises a plurality of first transistors and a plurality of second transistors, wherein the plurality of first transistors are connected in parallel, the plurality of second transistors are connected in parallel, the control end of the operational amplifier comprises a first control end and a second control end, the control end of the first transistor is electrically connected with the first control end of the operational amplifier, the first end of the first transistor is electrically connected with the second end of the second transistor, the second end of the first transistor is electrically connected with the ground, the control end of the second transistor is electrically connected with the second control end of the operational amplifier, the first end of the second transistor is electrically connected with the voltage end, the adjustment coefficient is in a first range, and the logic control module is configured to adjust the number of the first transistor and the second transistor which are turned on or off, wherein the driving capability of the first driving module refers to the number of the first transistor and the second transistor which are turned on or off. The control end of the second tr