Abstract:
There is provided an electrophoretic display device that is formed by pinching an electrophoretic element containing electrophoretic particles between one pair of substrates. The electrophoretic display device includes a display unit that is formed of a plurality of pixels. One substrate of the one pair of substrates includes a pixel electrode and a pixel switching element that are formed for each of the plurality of pixels, a memory circuit that is electrically connected between the pixel electrode and the pixel switching element and can hold an image signal supplied through the pixel switching element, and an electrostatic protection unit that is electrically connected between the pixel electrode and the memory circuit and is formed of at least one of a capacitor element, a resistor element, and a diode.
Abstract:
The display device of the present invention includes a display area having a plurality of pixels arranged in rows and columns, at least one source driving device providing power or electric charges for the pixels through source lines, at least one gate driving device controlling the pixels through gate lines, and a boundary switch separating the display area into a plurality of sub-display areas and placed between the sub-display areas to connect or disconnect the source lines and/or the gate lines. When the boundary switch disconnects the source lines and/or the gate lines, the sub-display area directly connecting with the source driving device or the gate driving device will be driven.
Abstract:
An object of the present invention is to provide an active matrix type electrophoresis display device whose number of the times of writings is further smaller. In an electrophoresis display device which performs the display of picture using a n-bit digital picture signal, the respective pixels are divided into a plurality of sub-pixels, the respective sub-pixels have a 1-bit memory circuit. Since an electrophoresis element is stable in once written state, upon the display of static picture, the picture is retained by the digital picture signal retained in a memory circuit, therefore, a periodic refresh operation which is conventionally considered to be required are capable of being omitted.
Abstract:
There is provided a method of driving an electrophoretic display device having a display unit including a plurality of pixels in which electrophoretic elements each including electrophoretic particles are disposed between a pixel electrode and a common electrode that face each other. The method includes: forming a gray scale image in the display unit by applying a voltage between the pixel electrode and the common electrode of each of the plurality of pixels in accordance with image data that has three or more gray scale levels; having the pixel electrode and the common electrode in a high-impedance state to be electrically cut off only for a predetermined period after the forming of the gray scale image; applying a first pulse voltage that has a same polarity as the voltage applied in accordance with the image data having a highest gray scale level in the forming of the gray scale image between the pixel electrode and the common electrode of a pixel of the plurality of pixels to which the voltage is applied in accordance with the image data having the highest gray scale level after the having the pixel electrode and the common electrode in the high-impedance state; and applying a second pulse voltage that has a same polarity as the voltage applied in accordance with the image data having a lowest gray scale level in the forming of the gray scale image between the pixel electrode and the common electrode of a pixel of the plurality of pixels to which the voltage is applied in accordance with the image data having the lowest gray scale level after the having the pixel electrode and the common electrode in the high impedance state.
Abstract:
A driving method of an electrophoretic display device composed of a pair of substrates with electrophoretic elements, each containing electrophoretic particles, interposed therebetween, first electrodes provided on one substrate of the pair of substrates so as to correspond to pixels, and a second electrode which is provided on the other substrate and is shared by all of the pixels, in which each pixel includes a pixel switching element connected to a scan line and a data line, a memory circuit connected to the pixel switching element, and a switch circuit disposed between the memory circuit and the first electrode, and the switch circuit is connected to a first control line and a second control line, the driving method includes: inputting an image signal to the memory circuit via the pixel switching element; causing the first control line and the second control line to be connected to the first electrode by driving the switch circuit in response to an output from the memory circuit; causing a potential of the second electrode to alternate between a first potential and a second potential in a state in which a potential of the first control line is set to the first potential and a potential of the second control line is set to the second potential; and setting the potential of the first control line to a third potential which is higher than the first potential in an image display step which is performed after the inputting an image signal.
Abstract:
A method of driving an electrophoresis display device having a displaying portion which includes an lectrophoresis element containing electrophoresis particles and disposed between a first electrode and a second electrode opposing to one another and which consists of a plurality of pixels, the driving method including a step of performing an image writing step in which an image is written into the displaying portion by applying a first potential or a second potential to the first electrode separately provided for the pixel and applying a reference pulse in which the first potential and the second potential repeatedly alternate at a predetermined interval to the second electrode which is a common electrode shared by all the pixels, and a step of performing at least one contrast maintaining step including a short term interval step in which the second electrode and all the first electrodes fall in a high impedance state for five or less seconds and an auxiliary pulse inputting step in which at least one cycle of the reference pulse is applied to the second electrode and a potential which is equivalent to the potential applied during the image writing step is applied to the first electrode while the reference pulse is applied.
Abstract:
A technique for modulating light by an optically addressed, electric charge accumulating spatial light modulator achieves substantially monotonic gray scale response. Embodiments digitally modulate the voltage across a photoreceptive material included in the spatial light modulator. The digital modulation scheme entails illuminating the photoreceptor with a series of light pulses propagating from an LCoS, in which the durations of the light pulses and their positions in time combine to produce binary-weighted equivalent rms voltages on the photoreceptor. The light pulses originate from a light-emitting diode or other switchable light source, and the timing of the light pulses is controlled such that they are emitted only when the associated LCoS is in a stable state. Emitting light pulses while the LCoS is in a stable state avoids non-monotonic behavior.
Abstract:
An electrophoretic display device includes a pair of substrates, an electrophoretic element that includes electrophoretic particles and that are held between the pair of substrates, and a display portion formed of a plurality of pixels. The display portion includes pixel electrodes, an opposite electrode, a first control line and a second control line. Each of the pixel electrodes is formed in each of the pixels. The opposite electrode is opposed to the plurality of pixel electrodes through the electrophoretic element. The first control line and the second control line are connected to each of the pixels. Each of the pixels includes a pixel switching element, a memory circuit, and a switch circuit. The memory circuit is connected to the pixel switching element. Switching of the switch circuit is performed by an output signal of the memory circuit to switch between a connected state where the pixel electrode is connected to the first control line and a connected state where the pixel electrode is connected to the second control line.
Abstract:
Selection lines are formed using one type of transistor. A data driver supplies data to data lines provided in correspondence with pixel rows. A gate driver supplies selection signals via a first switch to gate lines provided in correspondence with pixel lines. Also, each gate line is connected via a second switch to an off power supply. Then, voltages of the gate lines are controlled by switching the first and second switches on in a complementary manner.
Abstract:
In one embodiment, a circuit for driving an electronic component includes a first conduction path and a second conduction path connected in parallel. Each of the first and second conduction paths includes a field-effect transistor. The first field-effect transistor lies along the first conduction path, and the second field-effect transistor lies along the second conduction path. The circuit can be used in an electronic device that includes a radiation-emitting electronic component or a radiation-responsive electronic component. During a first time period, current flows through the first conduction path and the first electronic component while a second conduction path of a driving unit is off. During a second time period, current flows through the second conduction path and the first electronic component while the first conduction path of the driving unit is off.