一种驱动电路以及驱动器

Abstract

本申请提供了一种驱动电路以及驱动器，驱动电路包括电阻驱动模块、电容驱动模块和多个第一选择模块，通过电阻驱动模块使用电阻分压方式输出多个第一信号，并通过电容驱动模块使用电容充放电方式输出多个第二信号，然后通过第一选择模块接收第一选择模块对应的第一信号和第二信号，并选择第一选择模块对应的第一信号和第二信号中电压值较大的一个，作为显示屏的驱动信号进行输出，从而在电容驱动模块输出的第二信号的电压值过低的情况下，选择比第二信号的电压值大的第一信号作为驱动信号进行输出，避免相关技术中电容驱动电路中的电容的电容值误差大导致的驱动信号的电压值过低，进而避免显示屏出现显示暗影现象。

Claims

1. A drive circuit characterized by comprising: include: A resistor drive module (10), a capacitor drive module (20), and multiple first selection modules (30); The resistor drive module (10) is connected to each of the first selection modules (30) respectively, and the resistor drive module (10) is used to output multiple first signals using a resistor voltage divider method; The capacitor driving module (20) is connected to each of the first selection modules (30) respectively, and the capacitor driving module (20) is used to output multiple second signals using a capacitor charging and discharging method; Each of the first selection modules (30) has a corresponding first signal and a second signal. The first selection module (30) is used to receive the first signal and the second signal corresponding to the first selection module (30) and select the one with the larger voltage value between the first signal and the second signal corresponding to the first selection module (30) as the driving signal for the display screen for output.

2. The drive circuit according to claim 1, characterized in that, The first selection module (30) includes a first operational amplifier (P1), a first diode (D1), a second operational amplifier (P2), and a second diode (D2); The non-inverting input of the first operational amplifier (P1) is used to receive the first signal corresponding to the first selection module (30), and the output of the first operational amplifier (P1) is connected to the positive terminal of the first diode (D1); the negative terminal of the first diode (D1) is connected to the inverting input of the first operational amplifier (P1), the inverting input of the second operational amplifier (P2), and the output of the first selection module (30), respectively. The non-inverting input of the second operational amplifier (P2) is used to receive the second signal corresponding to the first selection module (30). The output of the second operational amplifier (P2) is connected to the positive terminal of the second diode (D2). The negative terminal of the second diode (D2) is connected to the inverting input of the first operational amplifier (P1), the inverting input of the second operational amplifier (P2), and the output of the first selection module (30), respectively.

3. The drive circuit according to claim 1, characterized by The driving circuit also includes a second selection module (40); The second selection module (40) is connected to each of the first selection modules (30). The second selection module (40) is used to connect to the driving end of the display screen and select one of the driving signals output by all the first selection modules (30) according to the received selection signal group for output.

4. The drive circuit according to claim 3, characterized in that, The second selection module (40) includes a plurality of first switching devices (K1) and a selection submodule (41); the first switching devices (K1) correspond to the first selection module (30); the selection submodule (41) has a plurality of selection terminals, the selection terminals corresponding to the first switching devices (K1); The first end of the first switching device (K1) is connected to the output end of the first selection module (30) corresponding to the first switching device (K1), the second end of the first switching device (K1) is connected to the driving end of the display screen, and the control end of the first switching device (K1) is connected to the selection end corresponding to the first switching device (K1). The selection submodule (41) is used to select one of the first switching devices (K1) to be turned on according to the selection signal group.

5. The drive circuit according to claim 4, characterized in that, The selection submodule (41) includes multiple selection units (411); the selection signal group includes multiple selection signals; the selection unit (411) has a corresponding first switching device (K1) and a selection signal; The output terminal of the selection unit (411) is connected to the control terminal of the first switching device (K1) corresponding to the selection unit (411). The selection unit (411) is used to receive the selection signal corresponding to the selection unit (411), and when the selection signal corresponding to the selection unit (411) is at a first level, it turns on the first switching device (K1) corresponding to the selection unit (411), and when the selection signal corresponding to the selection unit (411) is at a second level, it turns off the first switching device (K1) corresponding to the selection unit (411).

6. The drive circuit according to claim 5, characterized in that The selection unit (411) includes a first resistor (R1), a second resistor (R2), a third resistor (R3), and a second switching device (K2); In the selection unit (411), the first end of the first resistor (R1) is used to connect to the power supply, and the second end of the first resistor (R1) is connected to the first end of the second switching device (K2) and the control end of the first switching device (K1) respectively. The first terminal of the second resistor (R2) is connected to the second terminal of the second switching device (K2), and the second terminal of the second resistor (R2) is grounded; The first end of the third resistor (R3) is used to receive the selection signal corresponding to the selection unit (411), and the second end of the third resistor (R3) is connected to the control terminal of the second switching device (K2). The first end of the second switching device (K2) is connected to the control end of the first switching device (K1).

7. The drive circuit of claim 1, wherein The resistor driving module (10) includes n fourth resistors (R4), where n is a positive integer; each of the fourth resistors (R4) has a corresponding first selection module (30); The first terminal of the first fourth resistor (R4) is used to connect to the power supply, the second terminal of the i-th fourth resistor (R4) is connected to the first terminal of the (i+1)-th fourth resistor (R4), and the second terminal of the n-th fourth resistor (R4) is grounded, where i is a positive integer less than n; The first end of the fourth resistor (R4) is connected to the first input end of the first selection module (30) corresponding to the fourth resistor (R4).

8. The drive circuit of claim 1, wherein, The capacitor driving module (20) includes a charging submodule (21), an energy storage control submodule (22), and m first capacitors, where m is a positive integer; each first capacitor has a corresponding first selection module (30); The charging submodule (21) is connected to the energy storage control submodule (22), and the charging submodule (21) is used to charge the energy storage control submodule (22); The energy storage control submodule (22) is connected to each of the first capacitors respectively, and the energy storage control submodule (22) is used to control the charging and discharging of each of the first capacitors; The first capacitor is connected to the first selection module (30) corresponding to the first capacitor.

9. The drive circuit according to claim 8, characterized in that, The charging submodule (21) includes a third switching device (K3), a fifth resistor (R5), a sixth resistor (R6), and a third operational amplifier (P3); The first terminal of the third switching device (K3) is used to connect to the power supply, the second terminal of the third switching device (K3) is connected to the first terminal of the fifth resistor (R5) and the first terminal of the energy storage control submodule (22) respectively, and the control terminal of the third switching device (K3) is connected to the output terminal of the third operational amplifier (P3). The first end of the fifth resistor (R5) is connected to the first end of the energy storage control submodule (22), and the second end of the fifth resistor (R5) is connected to the first end of the sixth resistor (R6) and the inverting input of the third operational amplifier (P3), respectively. The first terminal of the sixth resistor (R6) is connected to the inverting input terminal of the third operational amplifier (P3), and the second terminal of the sixth resistor (R6) is grounded. The non-inverting input of the third operational amplifier (P3) is used to receive a reference signal.

10. The driving circuit according to claim 8, characterized in that, The energy storage control submodule (22) includes a second capacitor, multiple fourth switching devices (K4), multiple fifth switching devices (K5), a sixth switching device (K6), and a seventh switching device (K7); the j-th first capacitor has a corresponding fourth switching device (K4) and a fifth switching device (K5), where j is a positive integer less than m; The first terminal of the second capacitor is connected to the first terminal of each of the fourth switching devices (K4) and the first terminal of the seventh switching device (K7), respectively; the second terminal of the second capacitor is connected to the first terminal of each of the fifth switching devices (K5) and the first terminal of the sixth switching device (K6), respectively. The first terminal of the j-th first capacitor is connected to the second input terminal of the first selection module (30) corresponding to the j-th first capacitor, the second terminal of the fourth switch device (K4), and the second terminal of the fifth switch device (K5), respectively; the first terminal of the m-th first capacitor is connected to the second terminal of the sixth switch device (K6) and the second input terminal of the first selection module (30) corresponding to the m-th first capacitor, respectively; the second terminal of each first capacitor is grounded; The second terminal of the fifth switching device (K5) is connected to the second terminal of the fourth switching device (K4) corresponding to the fifth switching device (K5); the second terminal of the fifth switching device (K5) corresponding to the first first capacitor is connected to the output terminal of the charging submodule (21); the second terminal of the seventh switching device (K7) is grounded.

11. A driver, characterized by Includes the drive circuit as described in any one of claims 1 to 10.

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