TWI683073B - Light box structure - Google Patents

Abstract

A light box structure is used for examining filter lens and includes a box body, a control circuit, a lamp, a plurality of light emitting diodes, a plurality of shades and a plurality of light guides. The control circuit is arranged in the box body; the lamp is arranged in the box body and electrically connected to the control circuit. The light emitting diodes are arranged in the box body and electrically connected to the control circuit. The shades are arranged in the box body and cover the lamps and the light emitting diodes. One end of each light guide is assembled with the shade and another end of the light guide extends out of the box body. When the lamp is sensed to have insufficient signal to noise ratio for wavelength with low output intensity, the control circuit turns off the lamp. The control circuit controls the light emitting diodes to output light with narrow wavelength and having different wavelength with the wide wavelength of the lamp to provide complement.

Description

Light box structure

The invention relates to a light box, in particular to a light box structure which can adjust different light sources and different wavelength outputs.

It is known that there are many types of existing filters, such as CPL polarizers, ND dimming mirrors, UV protection mirrors and so on. When it is photography or optical inspection, a glass or plastic lens placed in front of the lens of the camera or optical inspection instrument can selectively absorb different wavelength bands of light, thereby producing special effects on photographic works and detected workpieces.

After the general filter is completed, the filter will be detected through the light source generated by the light bulb (tungsten halogen lamp or halogen lamp) in the light box. When detecting the filter, the light bulb produces a wide-wavelength continuous spectrum output light source, and different wavelengths also cause different output intensity. It often happens that the high-intensity wavelength has saturated the detector during use. The wavelength of the output intensity does not yet have a sufficient signal-to-noise ratio (S/N), so the filter cannot be effectively detected.

Therefore, the main purpose of the present invention is to solve the above-mentioned shortcomings. The present invention adds a plurality of light-emitting diodes to the light box structure, and does not have a sufficient signal-to-noise ratio (S/N) when measuring the wavelength of low output intensity At this time, the light bulb can be turned off and the light source provided by these light-emitting diodes with a narrow wavelength characteristic can be switched to complement the light bulb.

Another object of the present invention is to add a lens between the light bulb and the plurality of light emitting diodes and the plurality of light guide units inside the light box structure, so that the light source generated by the light bulb and the light emitting diodes can be focused and projected on On these light guide units.

Another object of the present invention is to add a variable aperture between the light bulb and the plurality of light guide units or between the light bulb and the lens. With the variable aperture, the output of the light source of the light bulb can be turned off or the output of the light source of the light bulb can be adjusted to achieve a bright case. Degree adjustment.

To achieve the above objective, the present invention provides a light box structure, including: a box body, a control circuit, a light bulb, a plurality of light-emitting diodes, a plurality of cover bodies, and a plurality of light guide units. The control circuit is arranged in the box. The light bulb is arranged in the box and electrically connected to the control circuit to output a continuous spectrum with a wide wavelength. The light emitting diodes are arranged in the box and electrically connected to the control circuit to output a narrow wavelength spectrum. The covers are arranged in the box and cover the light bulb and the light-emitting diodes. The light guide units are arranged in the box, and one end of the light guide units is connected to the cover body, so that the light guide units are arranged correspondingly to the bulb and the light emitting diodes. The light guide units The other end of the whole beam extends outside the box to provide a light output point. The control circuit is used to control the light bulb to be turned on. The light bulb does not have a sufficient signal-to-noise ratio when measuring the wavelength of low output intensity. The control circuit is used to turn off the light bulb and the control circuit is used to control the light-emitting diodes. Providing a narrow-wavelength characteristic output of different wavelengths is complementary to the wide-wavelength characteristic of the bulb light source.

In an embodiment of the invention, the control circuit includes at least an operation interface unit, a microprocessor, a first drive unit, a second drive unit, and a third drive unit, which are electrically connected by the microprocessor The operation interface unit, the first driving unit, the second driving unit and the third driving unit, the bulb is electrically connected to the first driving unit, and the second driving unit is electrically connected to the light emitting diodes .

In an embodiment of the invention, the operation interface unit is composed of a plurality of keys.

In one embodiment of the invention, the light bulb is a tungsten halogen lamp or a gas light bulb.

In one embodiment of the invention, the gas bulb is a halogen lamp.

In one embodiment of the present invention, the light bulb emits light at 360 degrees, and a plurality of light guide units can be used to receive light.

In an embodiment of the invention, a lens is disposed between the light bulb and the light emitting diodes and the light guide units.

In an embodiment of the invention, the lenses are focusing mirrors.

In one embodiment of the present invention, a iris diaphragm is disposed between the bulb and the lens, and the iris diaphragm is electrically connected to the third driving unit of the control circuit.

In one embodiment of the present invention, an iris diaphragm is disposed between the light bulb and the light guide unit, and the iris diaphragm is electrically connected to the third driving unit of the control circuit.

1‧‧‧Box

2‧‧‧Control circuit

21‧‧‧Operation interface unit

22‧‧‧Microprocessor

23‧‧‧ First drive unit

24‧‧‧ Second drive unit

25‧‧‧ Third drive unit

3‧‧‧ bulb

4‧‧‧ LED

5‧‧‧ Cover

6‧‧‧Light guide unit

7‧‧‧Lens

8‧‧‧Variable aperture

Fig. 1 is a schematic circuit block diagram of the light box structure of the first embodiment of the present invention; Fig. 2 is a spectral schematic diagram of the tungsten halogen bulb of the present invention; Fig. 3 is a spectral distribution of the light source of the present invention and the spectrum of the CCD sensing element Fig. 4 is a schematic diagram of a mixed spectrum of a plurality of light emitting diodes of the present invention; Fig. 5 is a circuit block diagram of a light box structure of a second embodiment of the present invention; Fig. 6 is a present The circuit block diagram of the light box structure of the third embodiment of the invention.

The technical content and detailed description of the present invention are now explained in conjunction with the drawings as follows: Please refer to FIG. 1, which is a schematic circuit block diagram of the light box structure of the first embodiment of the present invention. As shown in the figure: the light box structure of the present invention includes: a box body 1, a control circuit 2, a light bulb 3, a plurality of light-emitting diodes 4, a plurality of cover bodies 5 and a plurality of light guide units 6. The control circuit 2 controls the lighting of the light bulb 3 or the light-emitting diodes 4 so that the light sources of the light bulb 3 and the light-emitting diodes 4 are generated by the light guide units 6 and output to the box 1 External, that is, the filter (not shown) can be detected.

The box 1 is a closed box 1 for installing the control circuit 2, the light bulb 3, the light-emitting diodes 4, the covers 5 and the light guide units 6.

The control circuit (control circuit board) 2 includes at least an operation interface unit 21, a microprocessor 22, a first driving unit 23 and a second driving unit 24. The microprocessor 22 is electrically connected to the operation interface unit 21, the first driving unit 23 and the second driving unit 24, and the operation interface unit 21 inputs a control signal to drive the first through the microprocessor 22 respectively The driving unit 23 and the second driving unit 24 control the brightness of the light bulb 3 and the light emitting diodes 4 and adjust the intensity of the light source. In this drawing, the operation interface unit 21 is composed of a plurality of keys.

The light bulb 3 is electrically connected to the first driving unit 23. During the detection, the light bulb 3 is driven by the first driving unit 23, and the output wavelength provided is a wide continuous spectrum. In this drawing, the bulb 3 is a tungsten halogen lamp or a gas bulb.

The light-emitting diodes 4 are electrically connected to the second driving unit 24. During the detection, the light bulb 3 is driven by the first driving unit 23, and the output wavelength provided is a narrow spectrum. In this drawing, the light-emitting diodes 4 are light-emitting diodes with different wavelengths.

The cover bodies 5 cover the light bulbs 3 and the light-emitting diodes 4 so that the light sources generated by the light bulbs 3 and the light-emitting diodes 4 are collectively output.

The light guide units 6 are connected to the cover bodies 5, and the cover bodies 5 are connected at one end of the light guide unit 6 to make the light guide unit 6 and the bulb 3 and the light emitting diodes 4 are arranged correspondingly, and the other ends of the light guide units 6 extend in a bundle shape outside the box 1. The cover bodies 5 can focus the light sources generated by the light bulb 3 and the light-emitting diodes 4 on the light guide units 6 so that the light guide units 6 can lead the light sources out of the box 1 A light output point to provide the filter (not shown) required for detection. In this drawing, the light guide unit 6 is an optical fiber line.

When detecting the filter, the interface unit 21 is operated to enable the microprocessor 22 of the control circuit 2 to control the first driving unit 23 to drive the light bulb (tungsten halogen lamp or gas bulb such as halogen lamp) 3, Make the bulb 3 produce a wide-wavelength continuous-spectrum output light source, but the output intensity of different wavelengths is different. High-intensity wavelengths often occur during use. The CCD sensing element (not shown in the figure) has been saturated. Low output intensity wavelengths do not yet have a sufficient signal-to-noise ratio (S/N). At this time, it is necessary to control the first driving unit 23 through the microprocessor 22 of the control circuit 2 to turn off or reduce the light source generation of the light bulb 3, and at the same time control the second by the microprocessor 22 of the control circuit 2 The driving unit 24 drives the plurality of light-emitting diodes 4 to light up, so that the light sources of the light-emitting diodes 4 provide a narrow-wavelength characteristic, which is complementary to the wide-wavelength characteristics of the light source of the bulb 3.

Please refer to Figs. 2-4, which are the multiplication and multiplication results of the spectrum of the tungsten halogen bulb, the spectral distribution of the light source and the response of the CCD sensing element to the spectrum, and the mixed spectrum of a plurality of light emitting diodes. As shown in the figure: The present invention specifically illustrates that when the bulb 3 of the present invention uses a tungsten halogen lamp, it can be found that the intensity is weaker than 450 nm (as shown in FIG. 2), and the present invention uses a CCD sensing element (not shown in the figure) The result of measuring the tungsten-halogen lamp with the spectrometer made as follows: In general measurement, it is often found that the relative light intensity between 350nm and 450nm is insufficient, and the response of the 800nm to 1100nm due to the insufficient response of the CCD sensing element makes the above band amount The measurement is not accurate due to insufficient signal to noise ratio (S/N). At this time, the first drive unit 23 can be controlled by the microprocessor 22 of the control circuit 2 to turn off or weaken the light source generation of the light bulb 3, while being controlled by the microprocessor 22 of the control circuit 2 (see FIG. 1) The second driving unit 24 drives the light-emitting diodes 4 to provide a mixed spectrum of 365 nm, 395 nm and white light with the narrow wavelength characteristics of the light-emitting diodes 4 to complement the light source, so as to achieve a wide range with the light source of the bulb 3 The wavelength characteristics are complementary.

Please refer to FIG. 5, which is a circuit block diagram of a light box structure according to a second embodiment of the present invention. As shown in the figure: this embodiment is substantially the same as the first embodiment, the difference is that a lens 7 is arranged between the light bulb 3 and the light emitting diodes 4 and the light guide units 6, The lens 7 can enable the light source generated by the light bulb 3 and the light emitting diodes 4 to be focused and projected on the light guide unit 6. In this drawing, the lens 7 is a focusing mirror.

Please refer to FIG. 6, which is a circuit block diagram of a light box structure according to a third embodiment of the present invention. As shown in the figure: this embodiment is substantially the same as the first embodiment, the difference is that a variable aperture 8 is arranged between the bulb 3 and the light guide unit 6 or the bulb 3 and the lens 7, and the control The circuit 2 is additionally provided with a third driving unit 25, and the iris diaphragm 8 is electrically connected to the third driving unit 25.

When detecting the filter (not shown), when the box needs a wavelength of 450 nm of ultraviolet light, the third drive unit 25 is controlled by the microprocessor 22 of the control circuit 2 to operate the iris diaphragm 8, That is, the variable aperture 8 can be closed to prevent the light source of the light bulb 3 from outputting, and only the light source of the light emitting diodes 4 is output.

Further, since the light bulb 3 emits light at 360 degrees, a plurality of light guide units 6 can be used to receive light.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of patent protection of the present invention, so any equivalent changes in the description or drawings of the present invention are included in the rights of the present invention in the same way. Within the scope of protection, Chen Ming.

1‧‧‧Box

2‧‧‧Control circuit

21‧‧‧Operation interface unit

22‧‧‧Microprocessor

23‧‧‧ First drive unit

24‧‧‧ Second drive unit

25‧‧‧ Third drive unit

3‧‧‧ bulb

4‧‧‧ LED

5‧‧‧ Cover

6‧‧‧Light guide unit

Claims (10)

A light box structure includes: a box body; a control circuit, which is arranged in the box body; a light bulb, which is arranged in the box body and is electrically connected with the control circuit to output a wide-wavelength continuous spectrum; A light-emitting diode is arranged in the box and electrically connected to the control circuit to output a narrow-wavelength spectrum; a plurality of covers are arranged in the box and cover the bulb and the light-emitting diodes On the body; and a plurality of light guide units are arranged in the box, and one end of the light guide units is connected to the cover body, so that the light guide units are arranged corresponding to the light bulb and the light emitting diodes , The other ends of the light guide units extend in a beam shape outside the box to provide a light output point; wherein, the control circuit controls the light bulb to light up, and the light bulb does not have a wavelength for measuring the low output intensity Sufficient signal-to-noise ratio, the control circuit turns off the bulb, and the control circuit controls the light-emitting diodes to provide a narrow-wavelength characteristic output with different wavelengths that complements the wide-wavelength characteristic of the bulb light source. The light box structure as described in item 1 of the patent application scope, wherein the control circuit at least includes an operation interface unit, a microprocessor, a first drive unit, a second drive unit and a third drive unit. The microprocessor is electrically connected to the operation interface unit, the first driving unit, the second driving unit and the third driving unit, the light bulb is electrically connected to the first driving unit, the second driving unit and the light emitting units Diode electrical connection. The light box structure as described in item 2 of the patent application scope, wherein the operation interface unit is composed of a plurality of keys. The light box structure as described in item 1 of the patent application scope, wherein the light bulb is a tungsten halogen lamp or a gas light bulb. The light box structure as described in item 4 of the patent application scope, wherein the gas bulb is a halogen lamp. The light box structure as described in item 1 of the patent application scope, wherein the light bulb emits light at 360 degrees, and a plurality of light guide units can be used to receive light. The light box structure as described in item 2 of the patent application scope, wherein a lens is arranged between the light bulb and the light emitting diodes and the light guide units. The light box structure as described in item 7 of the patent application scope, wherein the lenses are focusing mirrors. The light box structure as described in item 7 of the patent application scope, wherein a variable aperture is arranged between the bulb and the lens, and the variable aperture is electrically connected to the third driving unit of the control circuit. The light box structure as described in item 7 of the patent application scope, wherein a variable aperture is arranged between the light bulb and the light guide unit, and the variable aperture is electrically connected to the third driving unit of the control circuit.

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