Method, control circuit, computer program product and printing device for an electrophotographic process with temperature-compensated discharge depth regulation

A control device to optimize load image generation in an electrophotographic process, comprising:

• a light-sensitive and temperature-sensitive photoconductor layer for pixel-by-pixel exposure with a temperature-sensitive light source;
• the photoconductor layer being more sensitive with rising temperature, such that given a predetermined guantity of light and predetermined charge it discharges deeper;
• the light source emitting a lesser luminous power with rising temperature given a same actuation power;
• a respective temperature compensation for the light source and for the photoconductor layer;
• the temperature compensation for the photoconductor layer being at least one of adapting current flowing through the light source and adapting exposure time of the light source;
• the temperature compensation for the light source being at least one of correction of the current flowing through the light source and a chance of the exposure time;
• for the temperature compensation of the photoconductor layer a measurement event which measures a discharge death of the photoconductor layer given predetermined luminous duration and predetermined current through the light source;
• a temperature of the light source measured in the course of the measurement event being used as a reference value for the temperature compensation of the light source;
• and
• in an operating phase of lesser temperature than a nominal temperature Tlimit, a temperature overcompensation occurs for the light source such that the activation power is dynamically superproportionally raised.

A method for optimizing load image generation in an electrophotographic process, comprising the steps of:

• providing a light-sensitive and temperature-sensitive photoconductor layer for exposure pixel-by-pixel with a temperature-sensitive light source;
• the photoconductor layer becoming more sensitive with rising temperature such that given a predetermined guantity of light and predetermined charge it discharges deeper;
• the light source emitting a lesser luminous power with rising temperature given a same actuation power;
• providing a respective temperature compensation for the light source and for the photoconductor layer;
• providing the temperature compensation for the photoconductor layer by at least one of adapting current flowing through the light source and adapting exposure time of the light source;
• providing the temperature compensation for the light source by at least one of correction of current flowing through the light source and change of exposure time;
• for the temperature compensation of the photoconductor layer, providing a measurement event in which a discharge death of the ohotoconductor layer is predetermined given predetermined luminous duration and predetermined current through the light source;
• using a temperature of the light source measured in the course of the measurement event as a reference value for the temperature compensation of the light source;
• and
• in an operating phase of lesser temperature than a nominal temperature Tlimit, a temperature over-compensation occurring for the light source such that the activation power is dynamically increased until the nominal temperature is reached.

A method for optimizing load image generation in an electrophotographic process, comprising the steps of:

• providing a light-sensitive and temperature-sensitive photoconductor layer for exposure pixel-by-pixel with a temperature-sensitive light source:
• the photoconductor layer becoming more sensitive with rising temperature such that given a predetermined guantity of light and predetermined charge it discharges deeper;
• the light source emitting a lesser luminous power with rising temperature given a same actuation power;
• providing a respective temperature compensation for the light source and for the photoconductor layer;
• providing the temperature compensation for the photoconductor layer by at least one of adapting current flowing through the light source and adapting exposure time of the light source;
• providing the temperature compensation for the light source by at least one of correction of current flowing through the light source and change of exposure time;
• for the temperature compensation of the photoconductor layer, providing a measurement event in which a discharge depth of the photoconductor layer is predetermined given predetermined luminous duration and predetermined current through the light source;
• using a temperature of the light source measured in the course of the measurement event as a reference value for the temperature compensation of the light source;
• and
• in an operating phase of lesser temperature than a nominal temperature Tlimit, a temperature over-compensation occurs for the light source such that the activation power is dynamically increased superproportionally.

A computer program product for optimizing load image generation in an electrophotographic process wherein a light-sensitive and temperature-sensitive photoconductor layer are provided for exposure pixel-by-pixel with a temperature-sensitive light source, the photoconductor layer being more sensitive with rising temperature such that given a predetermined quantity of light and predetermined charge it discharges deeper, and the light source emitting a lesser luminous power with rising temperature given a same actuation power, said computer program product comprising:

• a program on a computer readable media;
• and
• said program
• providing temperature compensation for the photoconductor layer by controlling at least one of an adaption of current flowing through the light source and an adaption of exposure time of the light source,
• providing temperature compensation for the light source by at least one of correcting current flowing through the light source and changing exposure time,
• for said temperature compensation of the photoconductor layer controlling provision of a measuring event in which a discharge depth of the photoconductor layer is predetermined given predetermined luminous duration and predetermining current through the light source,
• using a temperature of the light source measured in the course of the measurement event as a reference value for the temperature compensation of the light source, and
• holding light energy of the light source constant between successive discharge depth measurements.

A computer program product for optimizing load image generation in an electrophotographic process wherein a light-sensitive and temperature-sensitive photoconductor layer are provided for exposure pixel-by-pixel with a temperature-sensitive light source, the photoconductor layer being more sensitive with rising temperature such that given a predetermined quantity of light and predetermined charge it discharges deeper, and the light source emitting a lesser luminous power with rising temperature given a same actuation power, said computer program product comprising:

• a program on a computer readable media;
• and
• said program
• providing temperature compensation for the photoconductor layer by controlling at least one of an adaption of current flowing through the light source and an adaption of exposure time of the light source,
• providing temperature compensation for the light source by at least one of correcting current flowing through the light source and changing exposure time,
• for said temperature compensation of the photoconductor layer controlling provision of a measuring event in which a discharge depth of the photoconductor layer is predetermined given predetermined luminous duration and predetermining current through the light source,
• said computer program using a temperature of the light source measured in the course of the measurement event as a reference value for the temperature compensation of the light source, and
• said computer program in an operating phase of lesser temperature than a nominal temperature Tlimit, controlling a temperature over compensation for the light source such that the activation power is dynamically superproportionally raised.