Pixel circuit and display device
A technology of pixel circuit and charging unit, applied in static indicators, instruments, etc., can solve problems such as affecting the OLED current of the light-emitting element, uneven brightness of the OLED display, and decreased display quality.
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Embodiment 1
[0091] figure 2 It is a schematic structural diagram of a pixel circuit provided by Embodiment 1 of the present invention. Such as figure 2 As shown, the pixel circuit provided by the embodiment of the present invention includes: a charging unit 21, a light emitting unit 22 and an error compensation unit 23; wherein,
[0092] The voltage storage terminal 211 of the charging unit 21 is connected to the voltage input terminal 221 of the light emitting unit 22;
[0093] One end of the error compensation unit 23 is connected to the voltage storage terminal 211 of the charging unit 21, and the voltage of the voltage storage terminal 211 of the charging unit 21 is used to determine the magnitude of the current flowing through the light emitting unit 22;
[0094] The control terminal 231 of the error compensation unit 23 is used to receive the light-emitting control signal, and the light-emitting control signal is used to control the light-emitting unit 22 to emit light or stop e...
Embodiment 2
[0102] exist figure 1 On the basis of the illustrated embodiment, the embodiment of the present invention also provides a pixel circuit, image 3 It is a schematic structural diagram of the pixel circuit provided by Embodiment 2 of the present invention. Such as image 3 As shown, the pixel circuit further includes: a voltage buffer unit 24;
[0103] One end of the voltage buffer unit 24 is connected to the voltage storage terminal 211 of the charging unit 21, and the other end of the voltage buffer unit 24 is connected to the first DC power supply; the first DC power supply provides a negative voltage;
[0104] The voltage buffer unit 24 is used for slowing down the voltage variation of the voltage storage terminal 211 of the charging unit 21 when the charging unit 21 finishes charging and the light emitting control signal controls the light emitting unit 22 to emit light.
[0105] Exemplary, such as image 3 As shown, the pixel circuit provided by this embodiment, in fig...
Embodiment 3
[0109] exist figure 2 or image 3 On the basis of the illustrated embodiments, the embodiment of the present invention further provides a pixel circuit. Figure 4 It is a schematic structural diagram of a pixel circuit provided by Embodiment 3 of the present invention. refer to Figure 4 As shown, the pixel circuit includes: a light emitting unit 22, a charging unit 21 and an error compensation unit 23; wherein,
[0110] The light emitting unit 22 includes: a first controllable element 31, a second controllable element 32, a third controllable element 33 and a light emitting element 34; the charging unit 21 includes: a fourth controllable element 35, a fifth controllable element 36 and a charging unit element 37;
[0111] The first end of the first controllable element 31 is connected to the second DC power supply VDD, the second end of the first controllable element 31 is connected to the first end of the second controllable element 32, and the first end of the second co...
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