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US 7,653,330 B2Granted
Image forming apparatus to form an image using a display unit, and printing method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsSeock-deock Hong, Jung-ho Bang
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a display unit which outputs image data in the form of a complete image, a photosensitive medium which forms an electrostatic latent image corresponding to the image outputted from the display unit, a developing unit which develops the electrostatic latent image formed on the photosensitive medium, a transfer unit which transfers the developed image of the photosensitive medium onto a printing medium, and a fixing unit which fixes the transferred developed image in the printing medium.
Claims29
An image forming apparatus, comprising:
- a display unit to output image data in the form of an image;
- a photosensitive medium disposed along a direction to form an electrostatic latent image corresponding to the image outputted from the display unit;
- a developing unit disposed adjacent to the display unit to develop the electrostatic latent image formed on the photosensitive medium along the direction;
- a transfer unit to transfer the developed image of the photosensitive medium onto a printing medium;
- and
- a fixing unit to fix the transferred developed image in the printing medium.
3 more elements
A printing method, comprising:
- forming an electrostatic latent image onto a photosensitive medium according to image data using an image output from a display unit, the forming of the electrostatic latent image comprising:
- driving the photosensitive medium to move at a predetermined speed,
- forming a page unit of the electrostatic latent image onto the photosensitive medium by driving the display unit;
- and
- developing the electrostatic latent image on the photosensitive medium,
- wherein the forming of the page unit of electrostatic latent image, comprises:
- increasing the driving velocity of the photosensitive medium until the electrostatic latent image area arrives at a developing zone.
4 more elements
A printing method, comprising:
- forming an electrostatic latent image onto a photosensitive medium according to image data using an image output from a display unit, the forming of the electrostatic latent image comprising:
- driving the photosensitive medium to move at a predetermined speed,
- forming a page unit of the electrostatic latent image onto the photosensitive medium by driving the display unit;
- and
- developing the electrostatic latent image on the photosensitive medium,
- wherein a relationship between a length (X) of the display unit and a length (s) of the image is expressed by a mathematical expression as follows:
- X≧s.
4 more elements
A printing method, comprising:
- forming an electrostatic latent image onto a photosensitive medium according to image data using an image output from a display unit, the forming of the electrostatic latent image comprising:
- driving the photosensitive medium to move at a predetermined speed,
- forming a page unit of the electrostatic latent image onto the photosensitive medium by driving the display unit;
- and
- developing the electrostatic latent image on the photosensitive medium,
- wherein the forming of the page unit of the electrostatic latent image comprises:
- forming the electrostatic latent image by driving image output pixels of the display unit by a plurality of stages and randomly.
4 more elements
A printing method, comprising:
- forming an electrostatic latent image onto a photosensitive medium according to image data using an image output from a display unit, the forming of the electrostatic latent image comprising:
- driving the photosensitive medium to move at a predetermined speed,
- forming a page unit of the electrostatic latent image onto the photosensitive medium by driving the display unit;
- and
- developing the electrostatic latent image on the photosensitive medium,
- wherein a relationship between a length (X) of the display unit and a length (s) of the image is expressed by a mathematical expression 2 as follows:
- X≧[s +VB2×Δt×(m−1)]
- where VB2 is a velocity of the photosensitive medium, Δt is a delay time between random outputs, and m is a number of the random outputs.
5 more elements
A printing method, comprising:
- forming an electrostatic latent image onto a photosensitive medium according to image data using an image output from a display unit, the forming of the electrostatic latent image comprising:
- driving the photosensitive medium to move at a predetermined speed,
- forming a page unit of the electrostatic latent image onto the photosensitive medium by driving the display unit;
- and
- developing the electrostatic latent image on the photosensitive medium,
- wherein the forming of the page unit of the electrostatic latent image comprises:
- forming the electrostatic latent image by driving image output pixels of the display unit in opposite direction to the driving direction of the photosensitive medium by a plurality of stages and randomly.
4 more elements
A printing method, comprising:
- forming an electrostatic latent image onto a photosensitive medium according to image data using an image output from a display unit, the forming of the electrostatic latent image comprising:
- driving the photosensitive medium to move at a predetermined speed,
- forming a page unit of the electrostatic latent image onto the photosensitive medium by driving the display unit;
- and
- developing the electrostatic latent image on the photosensitive medium,
- wherein a relationship between a length (X) of the display unit and a length (s) of the image is expressed by a mathematical expression 3 as follows:
- X≧s×VB3/(VB3+VD)
- where VB3 is the velocity of the photosensitive medium, and VD is the velocity at which the display unit is driven in an opposite direction to the photosensitive medium by stages.
5 more elements
A printing method comprising:
- forming an electrostatic latent image onto a photosensitive medium according to image data, using an image output from a display unit, the forming of an electrostatic latent image comprising:
- stopping driving the photosensitive medium,
- driving the display unit and forming an electrostatic latent image on the photosensitive medium in a standstill position, and
- moving the photosensitive medium bearing the electrostatic latent image to a developing zone;
- and
- developing the electrostatic latent image on the photosensitive medium.
3 more elements
A printing method comprising:
- forming an electrostatic latent image onto a photosensitive medium according to image data, using an image output from a display unit, the forming of an electrostatic latent image comprising:
- driving the photosensitive medium with a predetermined speed,
- driving the display unit in the same direction as the photosensitive medium, and
- causing the display unit to form an electrostatic latent image while the display unit is driven;
- and
- developing the electrostatic latent image on the photosensitive medium.
3 more elements
An image forming apparatus, comprising:
- a photosensitive drum;
- and
- a display unit having a rounded surface to face a surface of the photosensitive drum to display image data to form an image.
Dependencies are inferred from the claim text.