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A light source driving control circuit and method for an image sensor

A technology driven by image sensors and light sources, applied in light sources, electric light sources, image communication, etc., can solve the problems of low image acquisition efficiency and restrictions on the speed of currency inspection, and achieve the effect of increasing speed and saving configuration time

Inactive Publication Date: 2018-09-11
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the light source control process of the existing image sensor, the multi-channel constant current source chip cyclically configures the light source and then lights the light source. The configuration time accounts for half of the light source control time, resulting in low image acquisition efficiency and restricting the speed of banknote inspection.

Method used

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  • A light source driving control circuit and method for an image sensor
  • A light source driving control circuit and method for an image sensor
  • A light source driving control circuit and method for an image sensor

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Experimental program
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Embodiment 1

[0049] image 3 It is a structural block diagram of a light source driving control circuit of an image sensor provided in Embodiment 1 of the present invention. The circuit can be integrated in financial equipment such as ATM (Automatic Teller Machine, automatic teller machine) to collect banknote images, and can also be applied to other image recognition equipment such as scanners or copiers. Such as image 3 As shown, the circuit 100 includes: a first chip 110 , a first light emitting group 120 , a second chip 210 and a second light emitting group 220 .

[0050] Wherein, the first chip 110 includes a first output front group 111 to an mth output front group 11m. The first light emitting group 120 includes a first light emitting element 121 to an mth light emitting element 12m. Each output terminal in the i-th output front group 11i is electrically connected to the i-th light-emitting element 12i. The first chip 110 configures the i-th output front group 11i and drives th...

Embodiment 2

[0067] Figure 4 It is a schematic diagram of a preferred light source driving control circuit of an image sensor provided in Embodiment 2 of the present invention. In this embodiment, 4 light sources are taken as an example for specific description. Such as Figure 4 As shown, the circuit 200 includes a first constant current source chip U1 , a first light emitting group 220 , a second constant current source chip U2 and a second light emitting group 230 .

[0068] Wherein, the first constant current source chip U1 includes a first output front group 221 and a second output front group 222 . Wherein, the first output front group 221 includes four output terminals 7-10, and the second output front group 222 includes four output terminals 11-14. The first light emitting group includes a first light emitting element LED-A and a second light emitting element LED-B. Among them, LED-A is electrically connected to four output terminals in the first output front group 221 , and L...

Embodiment 3

[0101] Figure 8 It is a flow chart of a method for driving and controlling a light source of an image sensor according to Embodiment 3 of the present invention. The method can be executed by a light source driving and controlling circuit, and the circuit can be implemented by means of software and / or hardware. refer to Figure 8 , this embodiment specifically includes the following steps:

[0102] Step 1. The first chip configures the i-th output front group and drives the i-th light-emitting element after the configuration is completed, and continues to configure the first output front-group after the first chip drives the m-th light-emitting element.

[0103] Wherein, the connection relationship between the light-emitting element and the output front group of the first chip can refer to the content described in Embodiment 1, which will not be repeated here. When the light-emitting elements are turned on, the driving current is first configured for the light-emitting eleme...

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Abstract

The invention discloses a light source driving control circuit and method of an image sensor. The circuit includes: a first chip and a first light-emitting group, the first chip configures the i-th output front group and drives the i-th light-emitting element after the configuration is completed, and the first chip continues to configure the first output after the completion of driving the m-th light-emitting element. group; a second chip and a second light-emitting group, the second chip configures the i-th output rear group and drives the i-th light-emitting device after the configuration is completed, and continues to configure the first output rear group after the second chip drives the m-th light-emitting device; When the first chip drives the i-th light-emitting element, the second chip configures the i-th output rear group, and when the second chip drives the i-th light-emitting device, if i

Description

technical field [0001] The invention relates to the technical field of LED lighting control, in particular to a light source drive control circuit and method for an image sensor. Background technique [0002] With the development of the economy, the circulation of banknotes is increasing. The application of financial self-service equipment such as ATM (Automatic Teller Machine, automatic teller machine) has saved a lot of human resources and greatly improved work efficiency. All financial self-service devices are equipped with a banknote identification module, that is, a banknote verification module. One of the most important components in the banknote verification module is the image sensor, which can collect image information visible and invisible to the naked eye on banknotes to identify counterfeit banknotes. [0003] The use of image sensors is mainly divided into two parts: light source lighting and image acquisition. Light source lighting refers to driving the LED li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/335H04N25/00H05B44/00
CPCH05B45/20
Inventor 赖伟
Owner SHENZHEN YIHUA COMP