EP 0687963 B1 19991103 - Image recording apparatus
Title (en)
Image recording apparatus
Title (de)
Bildaufzeichnungsgerät
Title (fr)
Appareil pour l'enregistrement d'image
Publication
Application
Priority
JP 12998794 A 19940613
Abstract (en)
[origin: EP0687963A2] A surface of a pyroelectric layer (1) of a latent image charge keeping medium (3) is selectively heated by a thermal head (4) according to a video signal. In a heated portion of the medium (3), there is collected electric charge to form an elecrtrostatic latent image (17) on the surface of the pyroelectric layer (1). When the latent image (17) is developed by a developer (7), a developing sleeve (10) is applied with an appropriate bias voltage obtained according to temperatures of the thermal head (4), the latent image charge keeping medium (3) and the apparatus sensed by temperature sensors (21, 21a, 21b). This keeps the potential contrast between the latent image (17) and the sleeve (10) to remain within a favorable range in any situation. Consequently, even when the charge density of the latent image becomes excessive due to, for example, heat accumulation of the thermal head (4), it is possible to prevent increase in the recording density so as to suppress the foggy portion in the picture. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/325 (2006.01); G03G 15/05 (2006.01); G03G 15/06 (2006.01); G03G 15/32 (2006.01)
CPC (source: EP)
G03G 15/065 (2013.01); G03G 15/32 (2013.01)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 0687963 A2 19951220; EP 0687963 A3 19970108; EP 0687963 B1 19991103; DE 69513087 D1 19991209; DE 69513087 T2 20000720; JP H07333955 A 19951222
DOCDB simple family (application)
EP 95304014 A 19950609; DE 69513087 T 19950609; JP 12998794 A 19940613