Fuji Photo Film Company, Limited

Fuji Photo Optical Co., Ltd.

Shuji Tahara

Kenji Suzuki

Takaaki Terashita

Hiroshi Sunagawa

Hirofumi Saita

Kazuhiko Katakura

Mamoru Ogasawara

Akirou Terajima

Sinobu Ono

A photographic printer for displaying an image on a liquid crystal panel, irradiating the light from a light source on said liquid crystal panel and exposing said image on a photosensitive material for a predetermined exposure time by the light transmitted through said liquid crystal panel is disclosed. Further, a method for controlling an exposure in such a photographic printer is disclosed. Before displaying an image on the liquid crystal panel, the drive voltage for producing a predetermined transmitted light amount is measured. On the basis of the difference between the measured voltage and the theoretical voltage for producing the predetermined transmitted light amount, an offset value of the drive voltage is adjusted. Accordingly, the operational error of the printer due to temperature change, due to the difference of the light transmittance between crystal panels, or due to the difference of the characteristic of voltage v.s. light transmittance between crystal panels is reduced.

Exposure control method and photographic printer

A photographic printer has an exposure station, in which a frame of a photographic film and color photographic paper are set. A light source is disposed in opposition to the color paper with reference to the photographic film set in the exposure station, and constituted by LED elements. The LED elements are disposed in a matrix for emitting light of red, green and blue colors. The light source illuminates the frame from behind. The color paper is exposed by the light transmitted through the frame, to print the frame recorded on the photographic film to the color paper. In a preferred embodiment, a drive signal is determined individually for driving respective the LED elements. The drive signal is applied to the respective LED elements.

Photographic printer and film scanner having an LED light source

A photosensitive material feed mechanism for the exposure station of an auto-printer in which a forward end of a lith plate is formed with a guide structure without a need for an increased number of parts in a manner that a photosensitive material may be smoothly fed into the exposure station with a forward end of photosensitive material being guided by the above-mentioned guide structure when the mechanism is initially loaded with photosensitive material. A greeting card kit serving as the exposure station of the auto-printer includes a basic frame, upper and lower guide plates fixed to the basic frame, and a douser exposed externally of the greeting card kit. The lith plate is formed with a character zone exposure window and a picture zone exposure window in addition to the previously mentioned guide structure and is capable of being withdrawably inserted into the greeting card kit through the externally exposed douser. A feed path for the photosensitive material may be laid upon the guide structure to initiate feed of photosensitive material immediately after loading thereof. The photosensitive material may also be laid upon the respective exposure windows to achieve exposure of the photosensitive material to the respective zone. A forward end of the guide structure is formed with an edge function to wedge photosensitive material aside as the lith plate is inserted into the greeting card kit after the mechanism has been loaded with photosensitive material.

Photosensitive material feed mechansim for auto-printer's exposure

Growing community of inventors

Kanagawa, Japan

Shuji Tahara