A gray scale control system for a liquid crystal display (LCD) positioned in a vehicle may include a microcontroller unit, a filter, and a switching network. The microcontroller unit may include a PWM port that is configured to supply a PWM signal to a LCD segment of the LCD. The filter may be operable to adjust voltage applied to the LCD segment. The switching network may include a switch device that is connected to the filter. The switching network is operable by the microcontroller unit to electrically couple and decouple the filter between the PWM port and the LCD segment by way of the switch device.

There is provided a semiconductor device including (1) a first power source section that includes a first power source output terminal and a second power source output terminal that output voltages at mutually different voltage levels, (2) a first output section that includes a first output stage switch that is provided between the first power source output terminal and a first voltage output terminal, and a second output stage switch that is provided between the second power source output terminal and the first power source output terminal, and (3) a controller that performs ON/OFF control of the first output stage switch and the second output stage switch such that both the first output stage switch and the second output stage switch are in an OFF state over a predetermined period encompassing a point in time when a signal level of the first signal switches.

A liquid crystal display panel is disclosed and has a driving circuit, a plurality of data lines, a plurality of scanning lines, and a plurality of pixel units. The driving circuit further includes a programmable DC current source being used to output a corresponding shaping electric current according to a reference voltage, and a shaping resistor being used to generate a corresponding shaping voltage according to the outputted shaping electric current. A liquid crystal display apparatus is also disclosed. The apparatus is able to output shaping voltages with different voltage levels at the same time, thus having a better 3D display effect.

To provide a small driver IC, in a pass transistor logic circuit that converts k-bit digital signals into analog signals, transistors supplied with a first-bit signal are arranged in a line in the channel width direction. The channel width of transistors supplied with second to kth-bit signals is made larger than (e.g., preferably larger than two times and smaller than eight times) that of the transistors supplied with the first-bit signal. The transistors are preferably arranged such that transistors of the same conductivity type are located adjacent to each other wherever possible.

There is provided a semiconductor device including (1) a first power source section that includes a first power source output terminal and a second power source output terminal that output voltages at mutually different voltage levels, (2) a first output section that includes a first output stage switch that is provided between the first power source output terminal and a first voltage output terminal, and a second output stage switch that is provided between the second power source output terminal and the first power source output terminal, and (3) a controller that performs ON/OFF control of the first output stage switch and the second output stage switch such that both the first output stage switch and the second output stage switch are in an OFF state over a predetermined period encompassing a point in time when a signal level of the first signal switches.

A method to drive bi-stable liquid crystal displays and related drivers and displays using same are disclosed. The method and driver use additional high impedance states of the outputs to save power while addressing bi-stable and multi-stable liquid crystal displays. The invention implements high impedance states at the driver outputs, allowing non-addressed sections of the display to electrically float and by doing so reduces the required power to drive the display. Other advantages include improved visual effect of an update, such as reduced flash during the update, simpler operation, and better yields due to a larger operating window.

The present invention discloses a Gamma voltage driving circuit, which comprises a voltage dividing resistor string, which comprises 2.sup.n resistors connected in series sequentially, used to divide a reference voltage into 2.sup.n Gamma voltages; wherein, n is an integer not less than 1; a reference voltage module, which provides the reference voltage for the voltage dividing resistor string; a voltage selecting module, which is used to selectively output one of the 2.sup.n Gamma voltages. The reference voltage module comprises a first reference voltage and a second reference voltage, the first reference voltage is coupled to one end of the voltage dividing resistor string, the second reference voltage is coupled between the 2.sup.n/2-th resistor and the (2.sup.n/2+1)-th resistor; wherein, the voltage selecting module comprises 2.sup.n1 transmission lines, which respectively connects the voltage dividing nodes of the first to (2.sup.n/21)-th resistors and the (2.sup.n/2+1)-th to 2.sup.n-th resistors in the voltage dividing resistor string to a output terminal; and each transmission line is provided with n1 switching units.

A display device includes a display panel, a polarizing module placed over a screen of the display panel, and a control unit. The control unit sequentially generates an interpolated image by a frame interpolation process from two consecutive frames of the data for the first image and, from the interpolated image thus generated, generates an reverse image of the interpolated image as a second image. The control unit causes the first image and the second image to be displayed by time division. The control unit controls the polarizing module so that a state of polarization of the polarizing module is a first state of polarization during a period of display of the first image and is a second state of polarization during a period of display of the second image in synchronization with a timing of the time division.