Illumination region control device and control method for LED phototherapy device

Abstract

The invention discloses an illumination region control device and control method for an LED phototherapy device. The control device comprises a host computer connected with an imaging CCD and a microprojector. The light output port of the micro projector is provided with an optical switch array, An LED array for outputting therapeutic light is disposed directly in front of the optical switch array. The optical switches in the optical switch array and the LED lights in the LED array have the same number and corresponding positions. One end of each optical switch is connected in series with thecorresponding LED light, and the other end of each optical switch is connected to ground. One end of each LED light is connected in series with the corresponding optical switch, and the other end ofeach LED light is connected to the level. After obtaining the image of a focus area, the control device converts the image into a highlighted image and projects the highlighted image onto the opticalswitch array, and the optical switch array turns on the LED array light source so that a therapeutic light source having consistent shape of the light-emitting area and highlighted image is formed, thereby achieving the control of a precise phototherapy to illumination area control.

Description

technical field [0001] The invention belongs to the field of medical equipment, and more specifically relates to a control device and a control method for an irradiation area of ​​an LED phototherapy equipment. Background technique [0002] Precise photodynamic therapy depends on whether the spot of laser irradiation matches the shape of the lesion. The better the match between the spot and the shape of the lesion, the less damage to normal tissues. [0003] At present, the method of controlling the shape of the irradiation area is mainly to use optical devices to shape the beam after the light is emitted, or to partially block the beam by using a diaphragm or a shading sheet, or to use a combination of the two to obtain a specified shape and irradiation area. uniform spot. [0004] Patent CN201420618502.6 introduces a laser spot shape adjustment device composed of a mirror frame, a beam expander input mirror, a diaphragm, a beam expander output mirror, a flat-top diffracti...

AI Technical Summary

Problems solved by technology

[0007] (1) This patent uses the traditional graphic segmentation-image recognition method to identify the lesion area, which requires complex graphic processing equipment and algorithms for calculation, which not only increases the complexity and cost of the system, but also the algorithm calculation will occupy a large number of machines time, it is difficult to update the shape and size of the irradiation area in real time;

[0008] (2) The row-by-row and column-by-column scanning method adopted in this patent determines that its utilization efficiency of LED is relatively low, and the light output intensity is low

Even if a latch is used to alleviate this contradiction, only one column of LED lights will be lit at a certain moment, and it is difficult to light up the LED light-emitting surface similar in shape to the lesion area at the same time

This results in a low power density of the light source, which cannot meet the actual demand for light power density of photodynamic therapy;

[0009] (3) With the improvement of image precision, the number of LEDs has increased greatly, which makes the column latches, single-chip microcomputers, row and column drivers required by this patent more complex, and the difficulty of the circuit increases exponentially.

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