KR19980057857A - Motion signal output circuit in thin film optical path controller - Google Patents

Abstract

Disclosed is an operation signal output circuit of a thin film type optical path adjusting device for easily configuring a drive signal output terminal for applying a driving signal to an active matrix in the thin film type optical path adjusting device. The inverter unit comprises a first inverter unit in which a plurality of inverters are connected in series and a second inverter unit in which a plurality of inverters are connected in series and inputs a signal. In addition, a gate terminal is connected to an output terminal of the first inverter unit, a gate terminal is connected to an output terminal of the PMOS and the second inverter unit which are switched by applying a first power supply voltage to the source terminal, and a second power source to the source terminal. The driving signal is applied to a plurality of transistors, which are composed of NMOSs in which a voltage is applied and switch operation, and constitute an active matrix. In the active matrix, the area of the drive signal output terminal is reduced to reduce the area required to construct the active matrix.

Description

Motion signal output circuit in thin film optical path controller

The present invention relates to an operation signal output circuit of a thin film type optical path control device, and more particularly to an operation signal output circuit of a thin film type optical path control device for easily configuring a drive signal output stage for applying a driving signal to an active matrix in the thin film type optical path control device. Weight and volume increase and manufacturing costs rise. In contrast, a liquid crystal display (LCD) has a simple optical structure and can be formed thin, and can reduce weight and reduce volume. However, the liquid crystal display device is inferior in efficiency to have a light efficiency of 1 to 2% due to polarized light, the response speed of the liquid crystal material is slow, and the inside is easily overheated. Projection type image display devices, such as AMA or DMD, developed in view of these disadvantages, have an advantage of having an improved light efficiency and a large screen size. Compared with the DMD having a light efficiency of about 5%, AMA can obtain a high light efficiency of 10% or more. _{3 3} Nb) O ₃ ) can be used for the deformation part. FIG. 2 is a circuit diagram showing the configuration of the drive signal output terminal in FIG. 1, and FIG. 3 is driven in an active matrix of a general thin film type optical path control device. This is a waveform diagram for showing the output signal of the CMOS constituting the signal output stage. _{DD1 DD2}

However, the driving signal output terminal of the active matrix of the conventional thin film type optical path adjusting device has a problem in that the driving signal output circuits are arranged horizontally in a horizontal direction, so that the entire area becomes large, thereby increasing the area of the active matrix.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in the thin film type control device, the configuration of the drive signal output circuit constituting the drive signal output stage of the active matrix is simplified to reduce the area required to construct the drive signal output stage. An object of the present invention is to provide an operation signal output circuit in a thin film type optical path control device.

FIG. 1 is a circuit diagram showing an active matrix of a general thin film type optical path adjusting device. FIG. 2 is a circuit diagram showing a configuration of a driving signal output stage in FIG.

The operation signal output circuit of the thin film type optical path control apparatus according to an embodiment of the present invention for achieving the above object, the output circuit is composed of an inverter unit 100 and a signal transmission unit 200 for applying a signal. The inverter unit 100 includes a first inverter unit 100a having a plurality of inverters I1 to I2 connected in series and a second inverter unit 100b having a plurality of inverters I3 to I5 connected in series. The output terminal of the first inverter unit 100a is connected to the PMOS 200a for switching operation. In addition, an NMOS 200b for switching operation is connected to an output terminal of the second inverter unit 100b. _{DD1 DD2 DD1 DD2}

The drain terminals of the PMOS 200a and the NMOS 200b are connected in common and are configured to output a driving signal.

Therefore, when the “low” signal is input to the signal transmission unit 200 through the inverter unit 100, the PMOS 200a is turned on and the first power voltage V _DD1 induced at the source terminal of the PMOS 200a is generated. 2) is outputted, when the "high" signal is input to the signal transmission unit 200 through the inverter unit 100, the NMOS 200b is turned on and the second power supply voltage induced in the source terminal of the NMOS 200b. (V _DD2 ) is output. The PMOS transistor connected to the _{DDl DD2} matrix is turned on.

As described above, the operation signal output circuit of the thin film type optical path control apparatus according to the embodiment of the present invention is configured to configure the drive signal output terminal by simplifying the configuration of the drive signal output circuit constituting the drive signal output terminal of the active matrix. Reduce the area required.

Claims (2)

Inverter unit 100 configured as a first inverter unit 100a having a plurality of inverters I1 to I2 connected in series and a second inverter unit 100b having a plurality of inverters I3 to I5 connected in series to input a signal. ); Then, the voltage is applied (V _DD1) switching operation PMOS (200a) and the _DD of the second inverter unit (100b) to The operation signal output circuit according to claim 1, wherein the first power supply voltage (V _DD1 ) is greater than a second power supply voltage (V _DD2 ).