초록 ▼

In order to effect an automatic focus control in an image pick-up apparatus, a photography lens for forming an image of the object onto a two-dimensional solid state image sensing device is arranged in a fixed position, while the two-dimensional solid state image sensing device is arranged movably i

In order to effect an automatic focus control in an image pick-up apparatus, a photography lens for forming an image of the object onto a two-dimensional solid state image sensing device is arranged in a fixed position, while the two-dimensional solid state image sensing device is arranged movably in the optical axis direction of the photography lens, and the image sensing device is moved in accordance with a focusing error signal detected by a focusing condition detecting circuit having an additional light receiving element mounted on the same substrate as the image sensor but discrete from and operating independently of the image sensor. Since the light and small solid state image sensing device is moved for the focus control instead of the heavy and large photography lens, it is possible to perform the focus control in a prompt manner and to make a mechanism for driving the image sensing device small and simple.

대표청구항 ▼

An automatic focus controlling apparatus comprising: a two-dimensional solid state image sensing device formed on a substrate; an optical lens coupled in a fixed position with respect to said substrate and positioned to project an image of an object upon said image sensing device; means for detectin

An automatic focus controlling apparatus comprising: a two-dimensional solid state image sensing device formed on a substrate; an optical lens coupled in a fixed position with respect to said substrate and positioned to project an image of an object upon said image sensing device; means for detecting a focusing condition of the image projected on said image sensing device, including at least one light receiving element array formed on the same substrate with said two-dimensional solid state image sensing device such that a portion of the image of an object received from said lens is projected upon said light receiving element array to produce a focusing error signal, said at least one light receiving element array being discrete from and operating independently of said image sensing device; and means responsive to said focusing error signal for moving said substrate with respect to the said fixed optical lens along an optical axis of said lens in a direction to produce high speed automatic focus of an image on said image sensing device.