Abstract: A display may have an array of pixels. Display driver circuitry may supply data and control signals to the pixels. Each pixel may have seven transistors, a capacitor, and a light-emitting diode such as an organic light-emitting diode. The seven transistors may receive control signals using horizontal control lines. Each pixel may have first and second emission enable transistors that are coupled in series with a drive transistor and the light-emitting diode of that pixel. The first and second emission enable transistors may be coupled to a common control line or may be separately controlled so that on-bias stress can be effectively applied to the drive transistor. The display driver circuitry may have gate driver circuits that provide different gate line signals to different rows of pixels within the display. Different rows may also have different gate driver strengths and different supplemental gate line loading structures.

Abstract: A signal converting circuit includes a voltage level converter circuit, a power circuit, a signal separation circuit, a signal modifying circuit, and a clamping circuit. The power circuit provides voltage to the signal modifying circuit and the voltage level converter circuit. The voltage level converter circuit converts signals from the RS232 interface to I2C interface compliant signals. When the I2C interface transmits signal to the RS232 interface, the signal separation circuit separates signal from the RS232 interface into two separate signals. The signal modifying circuit receives controlling signals sent from the RS232 interface and modifies the signals into a standard square wave signal, the modified standard square wave signal is sent to the clamping circuit. The clamping circuit clamps the voltage level of the signal according to the level that the I2C interface accepts.

Abstract: A signal converting circuit includes a voltage level converter circuit, a power circuit, a signal separation circuit, a signal modifying circuit, and a clamping circuit. The power circuit provides voltage to the signal modifying circuit and the voltage level converter circuit. The voltage level converter circuit converts signals from the RS232 interface to I2C interface compliant signals. When the I2C interface transmits signal to the RS232 interface, the signal separation circuit separates signal from the RS232 interface into two separate signals. The signal modifying circuit receives controlling signals sent from the RS232 interface and modifies the signals into a standard square wave signal, the modified standard square wave signal is sent to the clamping circuit. The clamping circuit clamps the voltage level of the signal according to the level that the I2C interface accepts.

Abstract: A parallel printed circuit board assembly includes a main circuit board (1) and an auxiliary circuit board (2). The main circuit board has a surface (14) with a plug connector (32) and a receptacle connector (44) mounted thereon. The auxiliary circuit board has a surface (22) with a plug connector (42) and a receptacle connector (34) mounted thereon. The plug and receptacle connectors of the main circuit board respectively mate with the receptacle and plug connectors of the auxiliary circuit board. Because of the arrangement of the plug and receptacle connectors on the main and auxiliary circuit boards, the circuit boards can only connect with one another in one correct way.

Abstract: A parallel printed circuit board assembly includes a main circuit board (1) and an auxiliary circuit board (2). The main circuit board has a surface (14) with a plug connector (32) and a receptacle connector (44) mounted thereon. The auxiliary circuit board has a surface (22) with a plug connector (42) and a receptacle connector (34) mounted thereon. The plug and receptacle connectors of the main circuit board respectively mate with the receptacle and plug connectors of the auxiliary circuit board. Because of the arrangement of the plug and receptacle connectors on the main and auxiliary circuit boards, the circuit boards can only connect with one another in one correct way.