摘要:
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 data of a change over time of luminance of a light emitting element. Further, by correcting a video signal inputted to the light emitting device in conformity with a characteristic of the driving TFT of each pixel and a degree of a deterioration of the light emitting element based on the over-described two data, nonuniformity of luminance caused by a deterioration of an electroluminescent layer and nonuniformity of luminance caused by dispersion of a characteristic of the driving TFT are restrained.
摘要:
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 data of a change over time of luminance of a light emitting element. Further, by correcting a video signal inputted to the light emitting device in conformity with a characteristic of the driving TFT of each pixel and a degree of a deterioration of the light emitting element based on the over-described two data, nonuniformity of luminance caused by a deterioration of an electroluminescent layer and nonuniformity of luminance caused by dispersion of a characteristic of the driving TFT are restrained.
摘要:
A light emitting device capable of preventing a luminance of individual light emitting elements from being fluctuated by applying electrical characteristics of TFTs for properly controlling current being fed to individual light emitting elements, and also capable of generating the constant luminance without adversely being affected by possible degradation of organic light emitting layers and variable temperature by way of preventing the luminance of light emitting elements from being lowered through degradation of organic light emitting layers. Instead of controlling the luminance of light emitting elements by means of a voltage applied to TFTs, by way of properly controlling current flowing into TFTs via a signal-line driving circuit, it is possible to hold on the current flowing into light emitting elements at a desired value without adversely being affected by electrical characteristics of TFTs. Further, a voltage biasing in an inverse direction is fed to light emitting elements per predetermined period of time. The above-described double means multiply such practical effects to more securely prevent the luminance from being lowered by possible degradation of organic light emitting layers, and make it possible to hold on such current flowing into light emitting elements at a desired value without being affected by electrical characteristics of TFTs.
摘要:
By controlling the luminance of light emitting element not by means of a voltage to be impressed to the TFT but by means of controlling a current that flows to the TFT in a signal line drive circuit, the current that flows to the light emitting element is held to a desired value without depending on the characteristics of the TFT. Further, a voltage of inverted bias is impressed to the light emitting element every predetermined period. Since a multiplier effect is given by the two configurations described above, it is possible to prevent the luminance from deteriorating due to a deterioration of the organic luminescent layer, and further, it is possible to maintain the current that flows to the light emitting element to a desired value without depending on the characteristics of the TFT.
摘要:
A packing material, a tag, a certificate, paper money, and securities, each of which can be surely prevented from counterfeit or deception, are disclosed. According to the present invention, a plurality of wireless tags is used for an object such as a packing material, a tag, a certificate, paper money, or securities. The location of the plurality of wireless tags attached to each of the object is varied on the object basis such that the object can be identified. Then, the object using the wireless tag is identified by detecting the location of the plurality of wireless tags attached to each of the object. The more random the locations of the wireless tags, the more certain it becomes to identify the object and to prevent or detect the counterfeit and the deception of the object.
摘要:
The present invention has an object of providing a light emitting device including an OLED formed on a plastic substrate, which can prevent the degradation due to penetration of moisture or oxygen. On a plastic substrate, a plurality of films for preventing oxygen or moisture from penetrating into an organic light emitting layer in the OLED (hereinafter, referred to as barrier films) and a film having a smaller stress than that of the barrier-films (hereinafter, referred to as a stress relaxing film), the film being interposed between the barrier films, are provided. Owing to a laminate structure of a plurality of barrier films, even if a crack occurs in one of the barrier films, the other barrier film(s) can effectively prevent moisture or oxygen from penetrating into the organic light emitting layer. Moreover, the stress relaxing film, which has a smaller stress than that of the barrier films, is interposed between the barrier films, thereby making it possible to reduce a stress of the entire sealing film. As a result, a crack due to stress hardly occurs.
摘要:
By controlling the luminance of light emitting element not by means of a voltage to be impressed to the TFT but by means of controlling a current that flows to the TFT in a signal line drive circuit, the current that flows to the light emitting element is held to a desired value without depending on the characteristics of the TFT. Further, a voltage of inverted bias is impressed to the light emitting element every predetermined period. Since a multiplier effect is given by the two configurations described above, it is possible to prevent the luminance from deteriorating due to a deterioration of the organic luminescent layer, and further, it is possible to maintain the current that flows to the light emitting element to a desired value without depending on the characteristics of the TFT.
摘要:
It is an object of the present invention to provide a highly sophisticated functional card that can ensure security by preventing forgery such as changing a picture of a face, and display other images as well as the picture of a face. A card comprising a display device and a thin film integrated circuit; wherein driving of the display device is controlled by the thin film integrated circuit; a semiconductor element used for the thin film integrated circuit and the display device is formed by using a polycrystalline semiconductor film; the thin film integrated circuit and the display device are sealed with a resin between a first substrate and a second substrate of the card; and the first substrate and the second substrate are plastic substrates.
摘要:
Irrespective of a specification of the controller, a plurality of TFTs are formed for the controller on a substrate in advance. Then, in accordance with a design of the controller, connection is achieved among sources, drains, and gates, which serve as three terminals in each of the plural TFTs, appropriately through a wiring formed on a layer different from the one where the plural TFTs are formed, so that the controller with a desired specification is formed. At this time, it is not required to use all the TFTs arranged on the substrate and some TFTs may remain unused depending on the specification of the controller.
摘要:
The present invention has an object of providing a light emitting device including an OLED formed on a plastic substrate, which can prevent the degradation due to penetration of moisture or oxygen. On a plastic substrate, a plurality of films for preventing oxygen or moisture from penetrating into an organic light emitting layer in the OLED (hereinafter, referred to as barrier films) and a film having a smaller stress than that of the barrier films (hereinafter, referred to as a stress relaxing film), the film being interposed between the barrier films, are provided. Owing to a laminate structure of a plurality of barrier films, even if a crack occurs in one of the barrier films, the other barrier film(s) can effectively prevent moisture or oxygen from penetrating into the organic light emitting layer. Moreover, the stress relaxing film, which has a smaller stress than that of the barrier films, is interposed between the barrier films, thereby making it possible to reduce a stress of the entire sealing film. As a result, a crack due to stress hardly occurs.