摘要:
The liquid crystal display device performs display by changing the number of gray scales depending on external light intensity, and switches the display mode in accordance with a content to be displayed on a display. By controlling a display mode-specific video signal generation circuit depending on external light intensity, an inputted video signal is outputted as an analog value, is outputted with a digital value of a binary, or is outputted with a multiple digital value. As a result, display gradation of a pixel changes timely. Accordingly, a clear image can be displayed. For example, a display device which secures visibility can be obtained in a wide range from under fluorescent light in a dark place or indoor to under outdoor sunlight.
摘要:
There is provided a display device capable of automatically controlling a luminance in response to a brightness of a surrounding. The display device has a gamma correction circuit for converting an image signal voltage into a drive voltage for gray scale display and a photosensor for controlling an input and output voltage characteristic of the gamma correction circuit in response to the brightness of the surrounding. In this case, the gamma correction circuit for converting the image signal voltage into the driver voltage for gray scale display is formed on a first substrate. The photosensor for controlling the input and output voltage characteristic of the gamma correction circuit in response to the brightness of the surrounding is formed on a second substrate. The second substrate is fixed to the first substrate.
摘要:
An object is to obtain a rectifier having a small voltage drop and to reduce the fabrication cost of a converter circuit. A photoelectric transducer device including: a photoelectric transducer element; and a converter circuit stepping up or stepping down an output of the photoelectric transducer element and including a switching element and a rectifier, in which the switching element is a first oxide semiconductor transistor that is normally off and in which the rectifier is a second oxide semiconductor transistor that is diode-connected and normally on.
摘要:
The semiconductor device includes a plurality of pixels each including a plurality of sub-pixels, a power supply line and a plurality of signal lines for operating the plurality of pixels, a driver circuit for outputting signals to the plurality of signal lines, a signal input circuit for controlling the driver circuit, a compensation circuit which determines if a pixel has a normal state, a defective bright spot, or a point defect in the case where a current value detected shows an abnormal value, and accordingly outputs a compensation signal to the signal input circuit, and a current value detection circuit which detects a current value flowing through the power supply line when each sub-pixel is lighted. Thus, a pixel including a sub-pixel which shows an abnormal current value when lighted is compensated by a signal output from the driver circuit.
摘要:
Generation of ripples and the decrease in the output voltage of a photoelectric conversion device are suppressed. The photoelectric conversion device includes a first photoelectric conversion element; a first voltage conversion element for converting the output voltage of the first photoelectric conversion element; a second photoelectric conversion element whose characteristic is different from the characteristic of the first photoelectric conversion element; a second voltage conversion element for converting the output voltage of the second photoelectric conversion element; and a control element for controlling timing of the first voltage conversion element and the second voltage conversion element.
摘要:
It is an object to achieve downsizing and a thin shape of a display module and an electronic device provided with the display module. The display module includes a first display panel in which a first display screen is formed on one main side; and a second display panel that is smaller than and overlapped with the first display panel, in which a second display screen is formed on an opposite side of the one main side. The display module includes, over a sealing substrate of the first display panel and/or the second display panel, at least one integrated circuit, which is connected to input terminals of the first display panel and the second display panel and controls operation of the both panels, arranged in a peripheral portion of the second display panel, which is a surface on an opposite side of a display surface of the first display panel.
摘要:
The present invention provides a manufacturing technique of a semiconductor device and a display device using a peeling process, in which a transfer process can be conducted with a good state in which a shape and property of an element before peeling are kept. Further, the present invention provides a manufacturing technique of more highly reliable semiconductor devices and display devices with high yield without complicating the apparatus and the process for manufacturing. According to the present invention, an organic compound layer including a photocatalyst substance is formed over a first substrate having a light-transmitting property, an element layer is formed over the organic compound layer including a photocatalyst substance, the organic compound layer including a photocatalyst substance is irradiated with light which has passed through the first substrate, and the element layer is peeled from the first substrate.
摘要:
It is an object to provide a light-emitting device and an electronic device which can provide an image with excellent image quality. One of the present inventions is a light-emitting device including a plurality of light-emitting elements each exhibiting a different emission color. At least one of the plurality of light-emitting elements has n light-emitting layers (n is a natural number, n≧2) between a pair of electrodes. Further, at least one of the n light-emitting layers includes a substance which provides emission from a triplet excitation state. In a light-emitting device having such a structure, an image is displayed by combining emissions from the plurality of light-emitting elements.
摘要:
In an EL display device which performs area grayscale display, image quality is improved and stabilized. A plurality of subpixels each having light emitting elements which emit light of approximately the same color and a plurality of monitor pixels each having the same number of subpixels as the pixel are provided. The light emitting element in the monitor pixel is manufactured at the same time as the light emitting element in the pixel, and the electrode of the light emitting element in the monitor pixel is connected to a different constant current source in each subpixel. A circuit for changing a potential of the electrode of the light emitting element in the pixel for each subpixel in accordance with a potential change of the electrode of the light emitting element of the monitor pixel, thereby the aforementioned purposes are achieved.
摘要:
In a display device in which one frame is divided into a plurality of subframes and a gray scale is expressed by a time gray scale method, there is a problem of pseudo contour. A gray scale is expressed by sequentially adding a weight of each subframe (light emission period, light emission time, and the like). Further, an erasing diode is provided in a pixel. By turning this erasing diode on, the signal stored in the pixel is erased, thereby a non-light emission period is provided. Accordingly, subframes with different light emission periods can be easily formed.