| Patent Number |
Title Of Patent |
Date Issued |
| 7623091 |
Display device, and driving method and electronic apparatus of the display device |
November 24, 2009 |
| The present invention provides a driving method of a display device for expressing gray scales with n bits (n is an integer) by dividing one frame into a plurality of subframes. By this driving method, pseudo contours which occur in displaying images by a time gray scale method can b |
| 7612746 |
Light emitting device and electronic device |
November 3, 2009 |
| There is provided a light emitting device capable of preventing light emission of an OLED caused due to an off current of a driver TFT and suppressing a reduction in a contrast, to thereby display a beautiful image. A wiring which is kept at a predetermined potential (hereinafter ref |
| 7594743 |
Illumination apparatus |
September 29, 2009 |
| A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. L |
| 7583032 |
Semiconductor device |
September 1, 2009 |
| A light emitting device capable of performing signal electric current write-in operations at high speed and without dispersion in the characteristics of TFTs structuring pixels influencing the brightness of light emitting elements is provided. The gate length L of a transistor in whi |
| 7576734 |
Signal line driving circuit, light emitting device, and method for driving the same |
August 18, 2009 |
| Variation occurs in transistor characteristics. The present invention relates to a signal line driver circuit comprising: a plurality of current source circuits corresponding to a plurality of wirings; and a shift register, characterized in that: the plurality of current source circu |
| 7567227 |
Electronic device and method of driving the same |
July 28, 2009 |
| To provide a novel driving method for driving an electronic device by using digital gray scale and time gray scale in combination, which secures high duty ratio, which can display an image normally even when a sustain period is shorter than an address period, and which is hardly affe |
| 7554362 |
Semiconductor device, driving method thereof and electronic device |
June 30, 2009 |
| The invention provides a semiconductor device having a current input type pixel in which a signal write speed is increased and an effect of variations between adjacent transistors is reduced. When a set operation is performed (write a signal), a source drain voltage of one of two tra |
| 7528643 |
Semiconductor device, electronic device having the same, and driving method of the same |
May 5, 2009 |
| A digital circuit which can operate normally regardless of binary potentials of an input signal is provided. A semiconductor device comprising a correcting unit and one or a plurality of circuit elements, the correcting unit including a first capacitor, a second capacitor, a first sw |
| 7511687 |
Display device, electronic apparatus and navigation system |
March 31, 2009 |
| A plurality of pairs of switch parts and current source circuits are disposed in each pixel. Switching of each of a plurality of the switch parts is controlled by a digital video signal. When the switch part is turned on, by a current supplied from the current source circuit making a |
| 7502039 |
Display device and driving method of the same |
March 10, 2009 |
| Writing of a digital video signal of a lower order bit into a memory is eliminated during a second display mode in which the number of gradations is reduced as compared to in a first display mode of high-level gradation. In addition, read out of the digital video signal of the lower |
| 7502005 |
Electronic device and driving method |
March 10, 2009 |
| An electro-optical device is provided having a pixel portion with a novel structure, and in which display irregularities such as crosstalk, which develop due to a drop in voltage caused by the wiring resistance of electric current supply lines in an electro-optical device, are improved |
| 7492338 |
Display device |
February 17, 2009 |
| In a conventional display device using light emitting elements, white color cannot be accurately displayed since the luminance of each sub-pixel varies for each color. Therefore, in order to achieve the uniformity in luminance of each sub-pixel, the amount of current or the current d |
| 7456625 |
Electric circuit |
November 25, 2008 |
| As for a transistor, overlapped are factors such as a variation of a gate insulation film which occurs due to a difference of a manufacturing process and a substrate used and a variation of a crystalline state in a channel forming region and thereby, there occurs a variation of a thr |
| 7456579 |
Light emitting device and production system of the same |
November 25, 2008 |
| To provide a light emitting device without nonuniformity of luminance, a correcting circuit for correcting a video signal supplied to each pixel to a light emitting device. The correcting circuit is stored with data of a dispersion of a characteristic of a driving TFT among pixels and da |
| 7453427 |
Semiconductor device and driving method thereof |
November 18, 2008 |
| A semiconductor device in which a signal current can be written quickly in a current source circuit of a current input type. A signal current is written after performing a pre-charge operation, thus the writing is performed quickly. In the pre-charge operation, a current is supplied to |
| 7443202 |
Semiconductor device and electronic apparatus having the same |
October 28, 2008 |
| With an offset circuit including transistors of the same conductivity type, offset of an input signal is performed. Then, the input signal after the offset is supplied to a logic circuit including transistors of the same conductivity type as that of the offset circuit, thereby H and L |
| 7432757 |
Booster circuit, semiconductor device, and electronic apparatus |
October 7, 2008 |
| A conventional circuit requires a booster circuit for generating a voltage higher than an external power supply voltage, thus low power consumption is difficult to be achieved. In addition, a display device incorporating the aforementioned conventional switching element for booster circu |
| 7427884 |
Semiconductor device |
September 23, 2008 |
| A shift register capable of supplying only a necessary clock signal to a necessary unit register with simple constitution. A semiconductor device is provided with a shift register in which a plurality of stages of unit registers is connected, in which the unit register comprises a flip-f |
| 7427223 |
Method of manufacturing a light-emitting device, personal computer using the same, and portable |
September 23, 2008 |
| There is provided a method for manufacturing a light emitting device in which no copy-in is caused in the case of a light emitting device having a glossy cathode. An uneven portion is formed on the surface of a cathode which is in contact with an organic layer in a pixel portion, and |
| 7411318 |
Digital circuit having correcting circuit and electronic apparatus thereof |
August 12, 2008 |
| Provided is a digital circuit (30) that comprises: a switching circuit (31) having first transistors (32, 33) supplied with power supply potentials (VDD, VSS): correcting circuits (34, 36) connected between an input terminal (IN) inputted with an input signal and control terminals (g |
| 7405730 |
Signal line driving circuit, light emitting device, and method for driving the same |
July 29, 2008 |
| Variation occurs in transistor characteristics. The present invention relates to a signal line driver circuit comprising: a plurality of current source circuits corresponding to a plurality of wirings; and a shift register, characterized in that: the plurality of current source circu |
| 7378882 |
Semiconductor device including a pixel having current-driven light emitting element |
May 27, 2008 |
| The invention provides a semiconductor device having a transistor that can supply a proper current to a load (EL pixel and signal line) without being influenced by variations. A voltage of each terminal of a transistor is controlled by a feedback circuit using an amplifier circuit. A |
| 7365713 |
Semiconductor device and driving method thereof |
April 29, 2008 |
| In a light emitting device, a variation in intensity caused by varying a threshold value of a TFT for supplying a current to a light emitting element for each pixel becomes a burden to an improvement of an image quality of the light emitting device. A voltage equal to the threshold v |
| 7358789 |
Level shifter for display device |
April 15, 2008 |
| A semiconductor device having a level shifter, a differential amplifier circuit, and the like, where power consumption is reduced by reducing an unnecessary through current and distortion of an output waveform can be suppressed. A gate terminal of the first transistor is a first input |
| 7355445 |
Digital circuit with smaller amplitude of input signal voltage than amplitude of power source vo |
April 8, 2008 |
| In order to provide a semiconductor device having a circuit for operating normally even when the amplitude of a signal voltage is smaller than the amplitude of a power source voltage, a correcting circuit is provided before a digital circuit to be operated normally. As for a signal o |
| 7351605 |
Method of manufacturing a semiconductor device |
April 1, 2008 |
| The number of masks is reduced in a method of manufacturing a semiconductor device that has a transistor and a photoelectric conversion element on an insulating surface. In a manufacturing method of the present invention, semiconductor layers functioning as a source region, a drain r |
| 7348825 |
Electric circuit |
March 25, 2008 |
| A transistor has variation in a threshold voltage or mobility due to accumulation of factors such as variation in a gate insulating film which is caused by a difference of a manufacturing process or a substrate to be used and variation in a crystal state of a channel formation region. Th |
| 7345661 |
Display device and electronic equipment |
March 18, 2008 |
| It is an object of the present invention to provide a display device that is able to display a three-dimensional image without reducing resolution in displaying a two-dimensional image to half, and prevent the device itself from being bulky. This display device is a display device that h |
| 7345657 |
Semiconductor device and display device utilizing the same |
March 18, 2008 |
| A source-drain voltage of one of two transistors connected in series becomes quite small in a set operation (write signal), thus the set operation is performed to the other transistor. In an output operation, two transistors operate as a multi-gate transistor, therefore, a current va |
| 7327168 |
Semiconductor device and driving method thereof |
February 5, 2008 |
| It is an object of the invention to provide a digital circuit which can operate normally regardless of binary potentials of an input signal. A semiconductor device having a correcting unit and a logic unit wherein the correcting unit includes a capacitor, first and second switches, w |
| 7324123 |
Display device and electronic apparatus |
January 29, 2008 |
| Outside light is received using a light sensor, and in accordance with the outside light intensity, each of a first display mode which expresses multiple gray scales and a second display-y mode which expresses a gray scale smaller in number than that in the first display mode is switched |
| 7319443 |
Current source circuit, display device using the same and driving method thereof |
January 15, 2008 |
| In a display device having a light emitting element, an accurate setting operation needs much time, unless a current value of the signal current (video signal) is set to high value. On the contrary, the driving current value for causing a light emitting element to emit light is very smal |
| 7316948 |
Semiconductor device and method of manufacturing the same |
January 8, 2008 |
| To obtain a semiconductor device and a method of manufacturing the same which can reduce influence of fluctuation in characteristic among transistors due to fluctuation in laser light irradiation number and laser light intensity on a semiconductor. There is provided a semiconductor d |
| 7283111 |
Display device and method of driving thereof |
October 16, 2007 |
| False contouring during display by time division gray scales can be prevented with high efficiency. The order of appearance of subframe periods, and the times at which the subframe periods begin, are changed between pixels driven by odd number gate signal lines and pixels driven by e |
| 7262749 |
Display device and method of driving the same |
August 28, 2007 |
| In a conventional EL display device, a general video signal (analog signal voltage) is sampled to be outputted to a source signal line and then inputted to a gate electrode of a driving TFT provided in each pixel. The drain current of the TFT is controlled to control the current flowing |
| 7256642 |
Booster circuit, semiconductor device, and electronic apparatus |
August 14, 2007 |
| A conventional circuit requires a booster circuit for generating a voltage higher than an external power supply voltage, thus low power consumption is difficult to be achieved. In addition, a display device incorporating the aforementioned conventional switching element for booster circu |
| 7256421 |
Display device having a structure for preventing the deterioration of a light emitting device |
August 14, 2007 |
| A structure for preventing deteriorations of a light-emitting device and retaining sufficient capacitor elements' (condenser) required by each pixel is provided. A first passivation film, a second metal layer, a flattening film, a barrier film, and a third metal layer are stacked in |
| 7253665 |
Semiconductor device and driving method thereof |
August 7, 2007 |
| The invention provides a semiconductor device which performs a write operation of a signal current rapidly to a current input type pixel. Before inputting a signal current, a precharge operation is performed by flowing a large current. After that, a signal current is inputted to perf |
| 7245297 |
Display device and electronic device |
July 17, 2007 |
| The luminance of light emitting elements varies when the characteristics thereof change due to changes in environment temperature and changes with time. It is an object of the present invention to suppress the effect of the change in current value of a light emitting element due to the |
| 7242449 |
Semiconductor device and integral image recognition/display apparatus |
July 10, 2007 |
| A novel integral image recognition/display apparatus includes a pixel matrix, an image sensor and peripheral driving circuits for driving them, has both image recognition function and display function, and is constituted into an "intelligent" configuration. This display apparatus inc |
| 7218349 |
Semiconductor device |
May 15, 2007 |
| A semiconductor device is provided in which each pixel includes an electric circuit (a bootstrap circuit) for generating an electric potential that is higher than a voltage given through capacitative coupling. Also, there is provided a semiconductor device in which a sufficient signa |
| 7204635 |
Illumination apparatus |
April 17, 2007 |
| A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. L |
| 7202863 |
Semiconductor device, and display device and electronic device utilizing the same |
April 10, 2007 |
| A semiconductor device having a normal function means is provided, in which the amplitude of an output signal is prevented from being decreased even when a digital circuit using transistors having one conductivity is employed. By turning OFF a diode-connected transistor 101, the gate |
| 7193619 |
Signal line driving circuit and light emitting device |
March 20, 2007 |
| Dispersion occurs in the characteristics of the transistors. The invention is a signal line driving circuit having a first and a second current source circuits corresponding to each of a plurality of signal lines, a shift register, and a constant current source for video signal, in which |
| 7193593 |
Liquid crystal display device and method of driving a liquid crystal display device |
March 20, 2007 |
| A liquid crystal display device having analog buffer circuits is provided which is reduced in luminance fluctuation. A source signal line driving circuit has a plurality of analog buffer circuits. Source signal lines connected to the analog buffer circuits are switched their connections |
| 7180485 |
Light emitting device |
February 20, 2007 |
| In order to suppress the influence of deterioration of a light emitting element resulting from a change over time, the present invention provides a light emitting device in which an electrical circuit for flowing a constant charge between both electrodes of the light emitting element is |
| 7180479 |
Signal line drive circuit and light emitting device and driving method therefor |
February 20, 2007 |
| The variation of characteristics of transistors occurs. The present invention is a signal line drive circuit having a plurality of current source circuit corresponding to a plurality of wirings, a first and a second shift registers, a latch circuit, the foregoing plurality of current |
| 7148630 |
Light emitting device |
December 12, 2006 |
| There is provided an active matrix EL display device that can display a clear multi gray-scale color display to reduce the shift in the potential caused by the potential drop due to the wiring resistance of a power source supply line, in order to decrease the unevenness in a display |
| 7138967 |
Display device and driving method thereof |
November 21, 2006 |
| Each pixel of a display device has a current supply circuit, a switch portion, and a light emitting element. The light emitting element, the current supply circuit, and the switch portion are connected in series between a power supply reference line and a power supply line. The switch |
| 7129918 |
Electronic device and method of driving electronic device |
October 31, 2006 |
| Problems such as insufficient brightness, caused by a reduction in duty ratio (the ratio of a light emitting period and a non-light emitting period), are improved upon in accordance with using a novel method of driving and a novel circuit in an electronic device. Signals are written |
