摘要:
A display device includes a display unit in which pixels are arranged in a matrix state and a drive circuit selecting respective pixels in the display unit by each row and giving additional potential to pixel electrodes of the pixels by using coupling, in which the drive circuit has a function of allowing the reverse polarity of potential added to pixel electrodes to be a potential which can add suitable voltage to additional potential lines in a frame before adding the additional potential.
摘要:
A display device includes a display unit in which pixels are arranged in a matrix state and a drive circuit selecting respective pixels in the display unit by each row and giving additional potential to pixel electrodes of the pixels by using coupling, in which the drive circuit has a function of allowing the reverse polarity of potential added to pixel electrodes to be a potential which can add suitable voltage to additional potential lines in a frame before adding the additional potential.
摘要:
A display device able to amplify the same input as a power supply voltage of IC by using low temperature polysilicon having high threshold voltage and large variation and an electronic apparatus using the same, including MCK use level shifters 171-1 and 171-2 of a type where a reset operation is periodically necessary, a logic circuit 173 for using a level shift horizontal synchronization signal Hsync to input reset pulses for the MCK level shifters 171-1 and 171-2 having a period of N horizontal periods shifted in phase by M horizontal periods (note, M
摘要:
A display device of a type capable of narrowing the pitch, realizing narrowing of the frame, and further lowering the power consumption and an electronic device using the device, wherein two horizontal drive circuits 13U and 13D employ an RGB selector scheme by storing three digital data in sampling and latch circuits, performing conversion processing to analog data three times by a common digital-to-analog conversion circuit during one horizontal period (H), selecting three analog data in the horizontal period in a time division manner, and outputting the same to data lines (signal lines).
摘要:
A display device and mobile terminal are provided. The display device can narrow the pitch, able to narrower the frame, and able to further reduce power consumption, comprising a display area; a vertical drive circuit; a first horizontal drive circuit converting input first and second digital image data to analog image signals, and supplying the same to a data line selected by the vertical drive circuit; and a second horizontal drive circuit converting input third digital image data to an analog image signal, and supplying the same to a data line selected by the vertical drive circuit, wherein the first horizontal drive circuit includes a sampling latch circuit for sequentially sampling and latching the first and second digital image data, a second latch circuit for latching the latch data of the sampling latch circuit again, a digital/analog conversion circuit (DAC) for converting the digital image data latched by the second latch circuit to an analog image signal, and a line selector for selecting the first and second digital image data converted to analog data by the DAC in a time division manner in a predetermined period and outputting the same to the data line.
摘要:
A display device able to amplify the same input as a power supply voltage of IC by using low temperature polysilicon having high threshold voltage and large variation and an electronic apparatus using the same, including MCK use level shifters 171-1 and 171-2 of a type where a reset operation is periodically necessary, a logic circuit 173 for using a level shift horizontal synchronization signal Hsync to input reset pulses for the MCK level shifters 171-1 and 171-2 having a period of N horizontal periods shifted in phase by M horizontal periods (note, M
摘要:
A display device and mobile terminal are provided. The display device can narrow the pitch, narrow the frame, and further reduce power consumption. The display device includes a display area; a vertical drive circuit; a first horizontal drive circuit converting input first and second digital image data to analog image signals, and supplying the same to a data line selected by the vertical drive circuit; and a second horizontal drive circuit converting input third digital image data to an analog image signal, and supplying the same to a data line selected by the vertical drive circuit. The first horizontal drive circuit includes a sampling latch circuit, a second latch circuit, a digital/analog conversion circuit, and a line selector for selecting the first and second digital image data in a time division manner in a predetermined period and outputting the same to the data line.
摘要:
A timing generating circuit with low power consumption and a small layout area, a display apparatus including the timing generating circuit as one peripheral driving circuit, and a portable terminal including the display apparatus as a display output section are provided. In the timing generating circuit, which is formed on an insulating substrate and generates output pulses SRFF1out to SRFFnout having different frequencies based on a master clock MCK, a clock generating circuit (11) generates an operating clock having a lower frequency than the master clock MCK frequency. Then, a counter section (12) operates based on this operating clock and successively outputs shifted pulses S/R1out to S/Rmount from shift registers (121-1) to (121-m). An output pulse generating section (13) generates output pulses SF1out to SFnout based on combinations of the shifted pulses S/R1out to S/Rmount.
摘要:
A supply voltage conversion circuit allowing fabrication of a charge pump circuit having a large current capability with a small area is provided. In a charge pump DC-DC converter (10) for converting a supply voltage VDD1 to a supply voltage VDD2, a level shifter (12) implements amplitude conversion to convert from a control pulse with amplitude of VSS-VDD1 to a control pulse with amplitude of VSS-VDD2. By using the control pulse having the converted amplitude as a pumping pulse, a flying capacitor (C11) is charged/discharged by MOS transistors (Qp11), and (Qn11) of a charge pump circuit (11), and switching of MOS transistors (Qn12), and (Qp12) coupled to the output of the flying capacitor (C11) is controlled.
摘要:
An oscillation circuit, power supply circuit, display device using same, and electronic apparatus which can be built in a display panel without causing an increase of cost and do not need any adjustment work, each having a pulse generation portion 161 formed by an oscillator outputting rectangular wave signals having a frequency variation and a frequency variation correction portion 162 for suppressing output rectangular waves of the pulse generation portion 161 within a certain frequency range and outputting the same to a boosting circuit 163, wherein the frequency variation correction portion 162 includes an input pulse counter 1621 having n number of counters cascade connected and counting numbers of high level and low level periods of rectangular waves input from the pulse generation portion within a comparison input period, a counter value comparison circuit 1622 for generating a selection signal for selecting a last output from any counter among the cascade connected counters when the input pulse counter counts any number, and an output selection circuit 1623 for receiving the selection signal and outputting a corresponding counter value.