Charge-coupled device with photo chromic layer

• US 5,869,855 A
• Filed: 03/13/1997
• Issued: 02/09/1999
• Est. Priority Date: 06/29/1996
• Status: Expired due to Term

• Current Assignee: Hanger Solutions, LLC (IP Investments Group LLC)
• Original Assignee: LG Semico Company Limited (SK Hynix Inc.)
• Inventors: Yun, Hyeong Ik, Yoon, Jee Sung
• Primary Examiner(s): MINTEL, WILLIAM A
• Application Number:
  US08/815,920
• Time in Patent Office: 698 Days
• Field of Search: 257/432, 257/433, 257/434, 257/680, 257/232, 257/233, 257/225, 257/294, 257/229
• US Class Current: 257/229
• CPC Class Codes: G02B 5/23 Photochromic filters
• CPC Class Codes: H01L 27/14893 comprising a photoconductive layer deposited on the CCD structure
• CPC Class Codes: H01L 31/02162 for filtering or shielding light, e.g. multicolour filters for photodetectors
• CPC Class Codes: H04N 23/70 Circuitry for compensating brightness variation in the scene
• CPC Class Codes: H04N 23/75 by influencing optical camera components

Abstract

A charge-coupled device including, a light-receiving part having a glass and receiving an image, a photo chromic layer formed on the glass and being progressively colored according to a level of brightness of the image, to control an amount of transmitted light such that the amount of light transmitted for bright parts and dark parts of an image are substantially equalized, and a frame located on sides of the light receiving part.

Claims

1. A charge-coupled device comprising:

a light-receiving part having a glass and receiving an image;

a photo chromic layer formed on the glass and being progressively colored according to a level of brightness of the image, to control an amount of transmitted light such that the amount of light transmitted for bright parts and dark parts of an image are substantially equalized; and

a frame located on sides of the light receiving part.

2. The charge-coupled device as claimed in claim 1, wherein the photo chromic layer is formed by adding fine halogenate silver crystals into an inorganic glass.

3. The charge-coupled device as claimed in claim 1, wherein the photo chromic layer is formed by adding fine silver chloride and copper chloride crystals into an inorganic glass.

4. The charge-coupled device as claimed in claim 1, wherein the glass includes a complex matrix of silicates, the matrix being transparent to visible light.