Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
An apparatus for forming an image, comprising: a photoreceptor including an imaging surface for forming an electrostatic latent image thereon in response to an exposure light, said photoreceptor having a light decay characteristic so that the potential of said imaging surface is not decayed in an initial period of exposure and the potential of said imaging surface is sharply decayed in a middle period of exposure; image writing means including a laser beam generator and a generator drive circuit, for scanning and exposing said imaging surface with a laser beam to write said latent image on said imaging surface; and said generator drive circuit including a signal generator for generating a reference wave signal, adapted to receive an image density signal, to modulate said image density signal on the basis of said reference wave signal and to drive said laser beam generator in accordance with said modulated image density signal.
Claim 2
Dependent Claim
20 words
The apparatus of claim 1, wherein said signal generator is capable of changing the amplitude of said reference wave signal.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1, wherein said signal generator sets the amplitude of said reference wave signal so that the maximum and minimum values of said image density signal are positioned inside the amplitude of said reference wave signal.
Claim 4
Dependent Claim
36 words
The apparatus of claim 1, further comprising exposure means for exposing uniformly overall said imaging surface, wherein said exposure means conducts said uniform exposure substantially simultaneously with the scanning and exposure of said image writing means.
Claim 5
Dependent Claim
33 words
The apparatus of claim 2 or claim 3, wherein said signal generator makes said amplitude of said reference wave signal large for a high contrast image and small for a low contrast image.
Claim 6
Dependent Claim
61 words
The apparatus of claim 2 or 3, wherein said generator drive circuit includes a circuit for generating a high frequency wave signal, and wherein said generator drive circuit modulates the amplitude of said high frequency wave signal on the basis of said modulated image density signal and drives said laser beam generator in accordance with said modulated high frequency wave signal.
Claim 7
Independent Claim
23 words
The apparatus of any one of claims 2 to 4, wherein said generator drive circuit modulates the intensity of said image density signal.
Claim 8
Dependent Claim
19 words
The apparatus of claim 4, wherein said exposure means uniformly exposes an image forming part of said imaging surface.
Claim 9
Dependent Claim
17 words
The apparatus of claim 4, wherein said exposure means is adapted to change the exposure light amount.
Claim 10
Dependent Claim
19 words
The apparatus of claim 4, wherein said generator drive circuit modulates the pulse width of said image density signal.