Showing papers by "Jun Koyama published in 2005"

Method for fabricating a semiconductor device

Abstract: The object of the invention is to provide a method for fabricating a semiconductor device having a peeled layer bonded to a base material with curvature. Particularly, the object is to provide a method for fabricating a display with curvature, more specifically, a light emitting device having an OLED bonded to a base material with curvature. An external force is applied to a support originally having curvature and elasticity, and the support is bonded to a peeled layer formed over a substrate. Then, when the substrate is peeled, the support returns into the original shape by the restoring force, and the peeled layer as well is curved along the shape of the support. Finally, a transfer object originally having curvature is bonded to the peeled layer, and then a device with a desired curvature is completed.

Peripheral driver circuit of liquid crystal electro-optical device

Abstract: In a peripheral driver circuit of a liquid crystal electro-optical device is comprised of a shift register circuit arranged by a plurality of registers, and a circuit for supplying power to each register. When an input signal is entered into an nth register, a supply of power to at least a portion of registers other than the nth register is stopped. The shift register circuit is constructed of a P-channel type TFT and a resistor. The circuit for supplying the power controls the supply of power to the shift register by using the output of the shift register circuit. This circuit for supplying the power is arranged by a P-channel type TFT and a resistor. The consumption power of the circuit for supplying the power is equal to and lower than that of the shift register circuit.

Integrated circuit, semiconductor device and ID chip

Abstract: A contactless semiconductor device is provided where a low power consumption is achieved and wireless communication is carried out stably. A power supply level of a reader/writer and the operating state of internal blocks of an ID chip are monitored. In accordance with such conditions, a clock signal of an optimal frequency and a power supply potential of an optimal level are selected to be supplied. By setting the operating mode in accordance with the power supply level or the power saving mode in accordance with the operating state of each block, a low power consumption ID chip and stable wireless communication can be provided.

Wireless processor, wireless memory, information system, and semiconductor device

Abstract: The invention provides a processor obtained by forming a high functional integrated circuit using a polycrystalline semiconductor over a substrate which is sensitive to heat, such as a plastic substrate or a plastic film substrate. Moreover, the invention provides a wireless processor, a wireless memory, and an information processing system thereof which transmit and receive power or signals wirelessly. According to the invention, an information processing system includes an element forming region including a transistor which has at least a channel forming region formed of a semiconductor film separated into islands with a thickness of 10 to 200 nm, and an antenna. The transistor is fixed on a flexible substrate. The wireless processor in which a high functional integrated circuit including the element forming region is formed and the semiconductor device transmit and receive data through the antenna.

Display device and method for operating the same

Abstract: To provide a display device capable of displaying a good quality image. According to the present invention, there is provided a display device comprising: a display panel composed of a pixel portion in which a plurality of TFTs are arranged in matrix, a source driver, and a gate driver; an image signal processing circuit for processing an image signal input from an external; and a control circuit for controlling the display panel and the image signal processing circuit, characterized in that the image signal processing circuit corrects the image signal on the basis of a correction table and feeds the display panel with the corrected image signal.

Display Device and Driving Method of the Same, and Electronic Apparatus

Abstract: The brightness of a light emitting element varies when changes in ambient temperature or changes with time occur. In view of this, the invention provides a display device where the influence of variations in the current value of the light emitting element due to changes in ambient temperature and changes with time can be suppressed. The display device of the invention includes a monitoring element that is driven with a constant current, and a voltage applied to the monitoring element is detected and inputted to a light emitting element. In other words, the monitoring element is driven with a low current, and a voltage applied to the monitoring element is inputted to the light emitting element such that the light emitting element is driven with a constant current.

Method of sealing an organic el display provided with an adhesive layer over a peripheral insulating layer

Abstract: A structure of a display device in which water is prevented from passing through the side faces of a display device using an organic light-emitting element and a gap between substrates is made uniform. On the first substrate having the light-emitting element provided thereon, the thicknesses of the layers deposited in the peripheral area, the pixel portion and the driving circuit portion are equalized with each other. Furthermore, an adhesive is provided as thin as possible in the peripheral area of the first substrate so as to bond a second substrate to the first substrate. As a result, the distance between the first substrate and the second substrate can be made uniform throughout the peripheral area of the first substrate, the pixel portion and the driving circuit. Moreover, since a protective film overlying the organic light-emitting element is also provided on the side faces of the second insulating film, water is prevented from entering the display device through its side faces.

Display device, its driving method, and electronic equipment

Abstract: PROBLEM TO BE SOLVED: To provide a display device which suppresses the influence by a fluctuation in a current value of a light emitting element due to a change of an environmental temperature and a change with lapse of time. SOLUTION: The display device is provided with a monitor element 107 driven by a constant current, detects a voltage applied to the monitor element and applies the voltage to the light emitting element. Namely, the monitor element is low-current driven and the voltage applied to the monitor element is applied to the light emitting element. The light emitting element is constant-current driven. As a result, the fault that the occurrence of a variation in the luminance is resulted in case of the change in the environment temperature and the occurrence of the change in the lapse of time is eliminated by the nature possessed by the light emitting element. COPYRIGHT: (C)2006,JPO&NCIPI

Semiconductor device, IC card, IC tag, RFID, transponder, paper money, valuable securities, passport, electronic device, bag, and clothes

Abstract: It is an object to provide a semiconductor device the data writing of which can be performed except in manufacturing and the counterfeiting of which by rewriting can be prevented. Furthermore, it is another object of the invention to provide a semiconductor device constituted by an organic memory having a simple structure at low cost. A memory cell is constituted by connecting a transistor in parallel or series to an organic element having an organic compound layer, and each memory cell is connected in series or parallel to constitute a NAND memory or a NOR memory. The organic element can change its electrical property irreversibly by application of a current or a voltage, irradiation of light, or the like.

Light-emitting device, its formation method, and electronic apparatus

Abstract: PROBLEM TO BE SOLVED: To realize further narrower framing in the case a driving circuit and a pixel part are formed on the same plate board, and furthermore, make a light-emitting device which has a structure advantageous for multiple chamfering by using a large-sized board by improving productivity by increasing the number of chamfering, and furthermore, make reliabilities of three kinds of light-emitting elements approximately the same in the case respective reliabilities of the light-emitting elements of R (red), G (green) and B (blue) are different in a full-colored light-emitting device. SOLUTION: A terminal electrode 310 is installed at a position overlapped with a peripheral circuit part 309, and the terminal electrode and an FPC 306 are connected by an anisotropic conductive adhesive material. In addition, a cover material 303 is fixed and adhered by a sealing material 304 contacted with the end face of a board 301 and the peripheral part of the board. Furthermore, in order to make the reliabilities of the three kinds of light-emitting elements approximately the same, only a light-emitting area of the light-emitting element is enlarged of which the reliability is lower than those of the other light-emitting elements. COPYRIGHT: (C)2006,JPO&NCIPI

Display device, its driving method and electronic apparatus

Abstract: PROBLEM TO BE SOLVED: To provide a display device capable of suppressing the influence due to variation in a current value of a light-emitting element which may be caused by changes in the environmental temperature and changes with time by solving problems, wherein because the light-emitting element has a property for changing its resistance value (internal resistance value) by peripheral temperature (hereafter, referred to as the environmental temperature), the resistance value is reduced, when the temperature of a room temperature, which is set to normal temperature, is increased higher than the normal temperature and the resistance value is increased, when the temperature is reduced lower than the normal temperature. SOLUTION: The display device is provided with a monitor element and is constituted so that a current is supplied from a current source to the monitor element, and voltage applied to the monitor element is applied to light-emitting elements of pixels. COPYRIGHT: (C)2006,JPO&NCIPI

P‐5: A Voltage Driving AMOLED Display with Luminance Control

Abstract: Voltage driving method is better for Active Matrix Organic Light Emitting Diodes (AMOLED) Display in power consumption and variations of thin film transistors (TFTs), although current driving method is better in consideration of the degradation of OLED as OLED luminance is generally proportional to current. Low power consumption is very important in particular to mobile devices such as a cellular phone. However, simple voltage driving method causes luminance variation depending on the ambient temperature and the degradation of OLED. We succeeded in resolving this problem by means of anode potential set by applying the constant current to monitor OLED laid on panel.

Semiconductor device and method for making same

Abstract: The area occupied by a photo-sensor element may be reduced and multiple elements may be integrated in a limited area so that the sensor element can have higher output and smaller size. Higher output and miniaturization are achieved by uniting a sensor element using an amorphous semiconductor film (typically an amorphous silicon film) and an output amplifier circuit including a TFT with a semiconductor film having a crystal structure (typically a poly-crystalline silicon film) used as an active layer over a plastic film substrate that can resist the temperature in the process for mounting such as a solder reflow process. A sensor element that can resist bending stress can be obtained.

Display device and method for driving same

Abstract: PROBLEM TO BE SOLVED: To provide a display device having pixel constitution in which a numerical aperture is not reduced, and a method for driving the display device by which a duty ratio can be improved and the reliability of a light emitting element can be improved. SOLUTION: The display device includes a signal line to which an analog signal is inputted, a first switch to be controlled by a first scanning line, a second switch to be controlled by a second scanning line, and the light emitting element connected to the second switch and constituted so as to select the first and second switches and input an analog signal in a first period in one gate selection period, select the first switch and input a reference signal from the signal line in a second period of the one gate selection period to turn on the light emitting element by the analog signal and the reference signal. COPYRIGHT: (C)2006,JPO&NCIPI

Semiconductor device and health data collecting system

Abstract: PROBLEM TO BE SOLVED: To solve the problem that health data cannot be managed rapidly because conventionally, people have to go to the place where a measurement instrument for health data is, to obtain health data and the like and further, people have to manage data by themselves even when using a portable measurement instrument. SOLUTION: According to the invention, a modulating circuit, a demodulating circuit, a logic circuit, a sensor circuit, and an antenna circuit are provided over an insulating substrate, and thereby data sensed by the sensor circuit is transmitted wirelessly. Health data on a human body is sensed and can be rapidly detected. COPYRIGHT: (C)2006,JPO&NCIPI

Display device and electronic apparatus using the same

Abstract: PROBLEM TO BE SOLVED: To provide a display device, which suppresses effect of variation in current value of a light emitting element due to variation in environmental temperature and secular change, and an electronic apparatus. SOLUTION: The display device includes a 1st light emitting element, a 2nd light emitting element, a constant current source which supplies a constant current to the 2nd light emitting element, a 1st circuit which measures time to supply a power source to the 1st light emitting element, a 2nd circuit which stores current-voltage characteristics with time of the 1st light emitting element, a 3rd circuit which forms correction data based on an output of the 2nd light emitting element, an output of the 1st circuit, and the characteristics with time, and a 4th circuit which corrects a power source potential based on the correction data and supplies the corrected power source potential to the 1st light emitting element. COPYRIGHT: (C)2006,JPO&NCIPI

Display device, active matrix type display device, passive matrix type display device and electronic appliance, and driving method of display device

Abstract: PROBLEM TO BE SOLVED: To provide a display device where fluctuation of current values of a light-emitting element caused by the ambient temperature change and degradation with time is suppressed. SOLUTION: A monitoring element 102 driven with a constant current is provided. After detecting a voltage generated in the monitoring element 102, the voltage is applied to a light-emitting element. That is, the monitoring element is driven with the constant current, and the voltage in the monitoring element 102 is applied to the light-emitting element so that the light-emitting is driven with the constant voltage. When a predetermined condition is satisfied, the voltage generated in the monitoring element 102 are sampled and a voltage is supplied to the light emitting element 115 from an extrapolation power supply circuit which generates the voltage based upon a mathematical formula of a change from the sampled voltage. COPYRIGHT: (C)2006,JPO&NCIPI

Semiconductor device and display apparatus

Abstract: The invention provides a semiconductor device comprising: a semiconductor film over an insulating surface; a gate insulating film over the semiconductor film; and a gate electrode comprising: a first conductive layer over the gate insulating film; and a second conductive layer over the first conductive layer; wherein the semiconductor film includes, a channel forming region, LDD regions in contact with the channel forming region, a source region and a drain region in contact with the LDD regions, wherein an end portion of the first conductive layer extends beyond an end portion of the second conductive layer, wherein the LDD regions overlap the first conductive layer with the gate insulating film interposed therebetween, wherein the second conductive layer has a tapered shape in the end portion of the second conductive layer in cross section, wherein the first conductive layer comprises at least a first element selected from the group consisting of Ta, W, Ti, Mo, AI, and Cu and the second conductive layer comprises at least a second element selected from the group consisting of Ta, W, Ti, Mo, AI, and Cu, and wherein the first element is different from the second element.

Process for production of semiconductor device obtaining tft having two gate insulator films

Abstract: PURPOSE: A process for manufacturing a semiconductor device is provided for obtaining a large capacitor in small area to improve a pixel part. CONSTITUTION: A light shielding layer(102) is formed on a substrate(101). A electrode(103) made of the same material as the light shielding layer is formed on the substrate. The light shielding layer and the electrode are covered by a first insulator film(104). An opening is formed on the electrode by etching the first insulator film. A second insulator film(105) covering the first insulator film and the opening is formed. A semiconductor layer(118) is formed on the second insulator film.

Wireless processor, wireless memory, information processing system, and semiconductor device

Abstract: PROBLEM TO BE SOLVED: To provide a processor which is obtained by forming a high-function integrated circuit using a polycrystalline semiconductor on a heat-sensitive substrate such as a plastic substrate or a plastic film substrate, and used as a wireless processor transmitting and receiving electric power or signals wirelessly, a wireless memory, and an information processing system. SOLUTION: A wireless processor comprises an element formation region including a transistor which has at least a channel formation region formed of a semiconductor film that has a thickness of 10 nm to 200 nm and is separated into islands, and an antenna. The transistor is secured to a flexible substrate. The wireless processor has a high-function integrated circuit including the element forming region. An information processing system is characterized by performing data transmission and reception between the wireless processor and a semiconductor device through the antenna. COPYRIGHT: (C)2006,JPO&NCIPI

Display device including a drive circuit, including a level shifter and a constant current source

Abstract: Power consumption is reduced in a driving circuit of a display device capable of handling a low voltage amplitude input signal by employing level shifters that utilize a differential amplifier. The driving circuit is divided into a plurality of units and each unit is provided with a constant current source. In addition to a usual scanning circuit, there is provided a sub-scanning circuit for controlling ON/OFF of the constant current source arranged in each unit. The sub-scanning circuit turns ON only the constant current sources in the unit that is being scanned. A current thus can be supplied efficiently.

Light emitting device, an operation aiding system, and a helmet for checking displayed information by a driver during driving without turning driver's eyes by switching displays in a front visual field of the driver

Abstract: PURPOSE: A light emitting device, an operation aiding system, and a helmet are provided to recognize quickly the change of physical and mental conditions of drivers and to warn a driver by changing displays and emitting flash. CONSTITUTION: A light emitting device(100) mounted at a vehicle within a front visual field of a driver is composed of front and rear polarizing plates(101,102) for covering front and rear sides of the light emitting device. The light emitting device is switched between each display mode for overlapping or intercepting a front view of the vehicle by regulating the rear polarizing plate interposed between the driver and the light emitting device. Plural light emitting diodes are arranged in a matrix form and composed of first and light transmitting electrodes and an organic compound layer.

P‐11: Development of a 1.51‐in. Quarter‐XGA (Monochrome 423ppi) Fully Integrated AMOLED Display and a Proposal of its Applications

Abstract: We have succeeded in development of the fully integrated AMOLED display suitable for a small-text portable information display terminal which realizes a super high resolution and integrates a luminance compensation circuit and a DC/DC converter on the substrate for the first time in the world. In this paper, we would like to discuss an approach to realize a super high resolution and technology for integrating functional circuits. We would also like to introduce an AMOLED display that we have recently fabricated. In addition, we would like to propose some applications of the AMOLED display.