Matsushita Electric Industrial Co., Ltd.

Sadashi Higuchi

Kiyoshi Yamamori

Shigeyoshi Hasegawa

Akio Yamashita

Tamotsu Kojima

Yuuji Mogi

Sohji Tsuchiya

Toshikuni Kojima

Wataru Fujikawa

Yoshimasa Ito

Soji Tsuchiya

Kimikatsu Satoh

An electrochromic display device comprises a pair of first and second, opposed insulative substrates, a layer of electrochromic substance sandwiched between the substrates, a transparent display electrode on the first substrate, and a counter electrode on the second substrate. A dielectric layer analogous in pattern to the display electrode is formed on the counter electrode to improve the device's life time and eliminate interference between adjacent display electrodes.

Electrochromic display having a dielectric layer

Disclosed is an ink jet recording apparatus of the type wherein printing ink is discharged from an ink nozzle of an ink jet printing head toward recording paper wrapped around a drum. The ink jet recording apparatus comprises first and second plates placed to be spaced each other and an ink droplet guiding member one end of which is placed in contact with a lower portion of the front surface of the ink jet printing head, the second plate acting as a member for supporting the ink jet printing head. The first plate has an aperture so that the other end of the ink droplet guiding member reaches the second plate through the aperture of the first plate. With this arrangement, ink attached to the surface of the ink jet printing head can be removed by flowing down through the ink droplet guiding member and the second plate.

Ink jet recording apparatus with a device for removing ink attached to

An ink ejection recording apparatus is disclosed which comprises a plurality of ink ejection heads commonly connected to an ink tank, each of the ink ejection heads having an ink nozzle through which minute ink droplets are discharged in accordance with an electric signal and an air nozzle opposing to the ink nozzle and adapted for forming an air stream which accelerates the ink droplets towards a recording medium so as to record an image on the recording medium by means of the droplets. The ink ejection heads are arranged at different heights and the ink ejection heads have different levels of balance pressure so that the levels of the ink pressure acting on the ink nozzles of the ink ejection head are equalized in the operating state of the apparatus. Pressure relieving means are provided for relieving pneumatic pressure applied to the ink ejection heads and to the ink tank and being arranged such that relief of pressure from said ink tank is conducted after relief of pressure from said ink ejection heads.

Ink ejection recording apparatus having means for equalizing the static

An ink jet recording apparatus has an ink jet unit from which tiny independent ink droplets, suspended by a flow of air, are made to fly towards a recording medium, thereby recording information on the medium. The apparatus has a heat washing unit disposed at a position beyond one end of a recording medium mounting portion, so that the ink jet unit which has been moved to this position after completion of the recording operation is washed by the head washing unit which is movable towards and away from the ink jet unit at this position, whereby a high stability and reliability of the ink jet recording are ensured for a long period of time without suffering from clogging of nozzles or contamination of the recording medium. The stability and reliability are further enhanced by the simultaneous use of an ink mist suction unit which sucks ink mist around the ink jet unit and an anti-clogging unit which prevents clogging of the nozzles.

Ink jet recording apparatus with head washing device

In an electrochromic display device including a pair of opposed substrates, a display electrode formed on one of the substrates and a counter electrode formed on the other substrate, the response speed and display life of the device are improved by its novel counter electrode structure including a low conductive film arranged to face the display electrode and a high conductive film arranged to uncover, adjoin or cover the former. Alternatively, the low conductive film is embedded in the high conductive film to face the display electrode. Each of the conductive films is essentially made of In.sub.2 O.sub.3, In.sub.2 O.sub.3 --SnO.sub.2 or SnO.sub.2. The high conductive film may be made of Au, Ag or Pt. Where the low conductive film is an insulating film, it is sandwiched by the high conductive films. The insulating film is made of a metal oxide, metal fluoride or metal nitride. The difference in electric resistance between the low and high conductive films is selected 10 times or more. This novel counter electrode structure reduces the leakage current and provides a uniform current density distribution thus ensuring an improved response speed and display life.

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Kawasaki, Japan

Sadashi Higuchi