摘要:
A plurality of display panels (10A and 10B) are provided on a single substrate (2). Data signal lines (11A), scanning signal lines (12A), a data signal line drive circuit (20A) for driving the data signal lines (11A), and a scanning signal line drive circuit (30A) for driving the scanning signal lines (12A) are provided for the display panel (10A). Data signal lines (11B), scanning signal lines (12B), a data signal line drive circuit (20B) for driving the data signal lines (11B), and a scanning signal line drive circuit (30B) for driving the scanning signal lines (12B) are provided for the display panel (10B). Input signal lines (17A and 17B) are provided so as not intersect each other in a plan view. This allows a reduction in power consumption and an increase in flexibility in design in a display panel which includes a plurality of display panels on a single substrate.
摘要:
Provided is a display device which can prevent screen noise caused such that a potential of a common electrode is reversed after a memory mode enters from a refresh period to an entire write-in period, and a method for driving the display device. The memory mode includes (i) an entire write-in period in which a potential of the common electrode (COM) is fixed and the display data is written into all the memory circuits (node (PIX)) in each row and (ii) a refresh period in which the display data which has been written during the entire write-in period is refreshed at least once while the common electrode (COM) is driven. In the memory mode, the potential of the common electrode during the entire write-in period being a potential which the common electrode having been driven had at the end of a refresh period preceding the entire write-in period.
摘要:
A memory device is provided which includes a memory circuit that allows a circuit which carries out a refresh operation to suitably carry out an original operation of the circuit even if an off-leakage current occurs in a transfer element used in a transfer section. A memory cell includes a switching circuit, a first retaining section, a transfer section, a second retaining section, a first control section, and a voltage supply, and the first control section is controlled to be in (i) a state in which the first control section carries out a first operation in which the first control section is in an active state or a non-active state and (ii) a state in which the first control section carries out a second operation.
摘要:
The present invention aims to provide a monolithic driver-type display device capable of reducing circuit scale of a sampling circuit, and keeping low power consumption by directly driving a source driver with an externally provided video signal.In the monolithic driver-type display device having a display portion for displaying video and circuits for driving the display portion formed on the same insulating substrate, a plurality of sampling switches are provided in association with a plurality of pieces of bit data contained in externally inputted digital video signals. The sampling switches are opened/closed based on sampling signals, thereby sampling the digital video signals for each piece of the bit data and converting the signals into parallel format for output to data lines. The outputted digital video signals charge parasitic capacitances on the data lines and are held therein.
摘要:
A memory-type liquid crystal display device includes transistors (N1, N2), retention electrodes (MRY), refresh output control sections (RS1), and capacitors (Cb1). In a data retention period, an electric potential of each of the retention electrodes (MRY) is changed via a corresponding one of the capacitors (Cb1) by changing an electric potential level of a retention capacitor wire signal that is supplied to a corresponding CS line (CSL(i)). Each of the refresh output control sections (RS1) receives the electric potential thus changed of a corresponding one of the retention electrodes (MRY) via the input section and controls an electric potential of a corresponding pixel electrode (PIX) in accordance with the electric potential thus changed.
摘要:
A memory liquid crystal display device includes a transistor (N1), a transistor (N2), a transistor (N3), a transistor (N4), a first storage capacitor (storage capacitor of an overlapping part of a capacitor electrode 37a and a CS line CSL(i)) connected to a pixel electrode (7), and a second storage capacitor (storage capacitor of an overlapping part of a capacitor electrode 37b and a CS extension section 10bb) connected to the pixel electrode (7) via the transistor (N2), the pixel electrode (7) being connected to (a) a source line (SL(j)) via the transistor (N1), (b) a data transfer control line (DT(i)) via the transistor (N4) and the third transistor, (c) a drain electrode (9a) of the transistor (N1) via a contact hole (13), and (d) a source electrode (8b) of the transistor (N2) and to a drain electrode (9c) of the transistor (N4), via a contact hole (14). This allows for improving a yield rate and for reducing malfunction caused by noise generated between signal lines, in a memory liquid crystal display device.
摘要:
In a memory liquid crystal display device, a potential of a storage capacitor line signal (CS) supplied to the CS lines (CSL(i)) are once decreased (ΔVcs) while the gate lines (GL(i)) are made simultaneously active (period t4, period t10) in the data holding period (T2), and the potential of the storage capacitor line signal (CS) is made back to its original potential while the gate lines (GL(i)) are made simultaneously inactive and the refresh output control lines (RC(i)) are made active (period t5, period t11). This reduces flicker, thereby allowing for improvement in display quality of the memory liquid crystal display device.
摘要:
Provided are a display device capable of preventing image noise arising from changes in potential of a common electrode and auxiliary capacitor lines at the time of a switch between a normal mode and a memory mode and a method for driving such a display device. In a case where it is necessary to cause the common electrode and the auxiliary capacitor lines to change in potential along with a switch between the normal mode and the memory mode, the change in potential is made while electrically connecting a node of each memory circuit to a corresponding source line with the corresponding source line having its potential fixed and with the memory circuit having its a switch circuit in a conductive state.
摘要:
A memory-type liquid crystal display device includes a liquid crystal panel including memory circuits, and conducts a refresh operation more than once during a display holding period after rewriting of a screen. The memory-type liquid crystal display device increases at least one of (i) a frequency at which the screen is rewritten and (ii) a frequency at which the refresh operation is conducted during the display holding period as an intensity of light received by the liquid crystal panel increases. This allows the memory-type liquid crystal display device to reduce power consumption while keeping its display quality.
摘要:
An object of the present invention is to provide a power supply circuit including a charge-pumping booster section which uses switching elements provided only by N-channel transistors yet does not have a problem of voltage drop by threshold value. In a booster section (11a), capacitors (C1) and (C2) have their respective first terminals connected with transistors (Q1, Q3) and (Q2, Q4) respectively. Each transistor has its gate terminal supplied with control signals generated in a driver section (11b). The driver section (11b) includes capacitors (C3, C4) connected with input terminals (Ti3, Ti4) for respective supply of clock signals DCK2, DCK2B each having a voltage alternating between −VDD and VDD (VDD represents an input supply voltage from outside), as level-shifted signals of clock signals DCK1, DCK1B which are supplied to second terminals of the capacitors (C1, C2) respectively. In this arrangement, the driver section 11b generates signals each having a voltage alternating between VDD and 3VDD, as the control signals.