Drive circuit, display device using the drive circuit and electronic apparatus using the display device
A technology for driving circuits and display devices, which is applied in the direction of electric solid-state devices, circuits, electrical components, etc., and can solve problems such as wide dispersion of output current
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Embodiment 1
[0066] The control current output circuit of the present invention and a display device using the control current output circuit will be explained below.
[0067] figure 1 It is a structural schematic diagram of an example of the control current output circuit of the present invention. It should be noted that in this embodiment, the structure of the control current output circuit 1100 is taken as an example, in which the output currents of the four quasi-control current output circuits 1102_1-1102_4 are switched sequentially, and the four output terminals of the control current output circuit (output terminal part) output.
[0068] exist figure 1 The medium control current output circuit 1100 is composed of a switch circuit 1102 and quasi-control current output circuits 1102 (1102_1-1102_4). The quasi-control current output circuits 1102_1-1102_4 have transistors 1112_1-1112_4, respectively, and output terminals C1-C4 of the quasi-control current output circuits 1102_1-11...
Embodiment 2
[0104] In this example, refer to Figure 14 The illustrated configuration of the control current output circuit is different from that shown in Embodiment 1.
[0105] exist Figure 14 Among them, the control current output circuit 1440 of this embodiment has a control current output circuit 1100, and the output current output from the output terminals Q1-Q4 of the control current output circuit 1100 is characterized in that it is input as a reference current to four control current output circuits 1400_1- 1400_4. Then, the control currents are output from the control current output circuits 1400_1-1400_4 to the control current lines CS1-CS16.
[0106] This can further reduce the dispersion of the output current by switching the reference current and supplying it to the control current output circuits 1400_1-1400_4.
[0107] It should be noted that the configuration and driving method of the control current output circuit 1100 and the control current output circuits 1400_1-1...
example 1
[0132] In this example, a display device having a plurality of control current output circuits is described, and the control current value of each control current output circuit is set in a different manner.
[0133] It should be noted that in this example described below, a display device inputting a digital video signal inputs an analog current corresponding to the input digital video signal to one pixel as a control current, and performs image display.
[0134] Here, the control currents respectively output by the plurality of control current output circuits correspond to tone reference currents. It should be noted that the tone reference current is a current whose current value is weighted corresponding to each bit of the digital video signal from high bit to low bit.
[0135] The corresponding tone reference current is selected using the digital video signal. This converts the digital video signal into a corresponding analog current. The analog current is then output to...
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