Anti-flare light area array CCD image sensor

Abstract

The invention is an anti-halation area array CCD image sensor which is realized by adding image-sensitive unit addressing circuit and a light integral time pulse generation circuit on the existing sensor; breaking off gate connecting wires for connecting a phase-sensitive zone with CRVA2 and CRVA3 terminals of each image-sensitive unit, and connecting gate of each image-sensitive unit to correspondent output terminal of data selector in the image-sensitive unit addressing circuit; and dividing signals of the CRVA2 and CRVA3 terminals into two paths one of which is connected to input terminal of a sequence pulse signal generation circuit and the other one is used as light integral time pulse control signal output. By independently setting light integral time of each image-sensitive unit, strong light and halation which are difficult to eliminate are prevented to make display image clear. The existing area array CCD image sensor can normally work under halation-free condition. The anti-halation CCD camera prepared in the invention has simple circuit, can be realized easily, and has good application prospects in the fields requiring mechanical observing device such as military affairs, traffic, public security and fire fighting.

Description

technical field [0001] The invention relates to a CCD image sensor, mainly relates to an area array CCD image sensor, specifically a novel anti-halation area array CCD image sensor. Background technique [0002] When the car meets at night, because the driver's eyes will be stimulated by the strong light of the opposite car, the driver can't see his own driving route at all, and can only drive by feeling and experience. The phenomenon of light may cause serious traffic accidents, resulting in serious consequences of car crashes and fatalities. [0003] In large-scale production workshops, it is still necessary to use arc welding machines for manual welding. The strong arc light generated by arc welding machines during welding will cause great damage to the eyes of welding operators. At the same time, the halo phenomenon caused by arc light will also affect The visual effect of the operator also indirectly affects the welding quality of the product. [0004] In addition, th...

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Problems solved by technology

The image signals output in these two cases cannot be restored by using image processing software.

[0012] Therefore, the area array CCD image sensor uses flood drainage technology to eliminate halo. Since the grid potentials of the "flood drainage" field effect transistors set next to all CCD charge storage units are exactly the same, for the scene when the car is driving at night, in order to get the scene in the scene For the image information in the darker part of the light, the light integration time of the CCD image sensor must be longer, which will inevitably cause the potential wells of all image sensitive units on the CCD image sensor corresponding to the strong light to be saturated and overflow, and the flood drainage method will discharge It is just the useful image information of these image sensitive units, and the full potential well charge left in the potential well is worthless because it cannot reflect the image information of the scene in the halo of the car light

[0013] The project team of this invention has searched domestic and foreign patent documents and published journal papers, and has not found any reports or documents closely related to the present invention.

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