TWI607666B - Security lighting device - Google Patents

Description

Safety light device

The invention is a safety type light-emitting device, in particular to a non-isolated circuit and can be judged by the control unit to cut off the power supply when the casing is broken to stop the light emission, thereby preventing the user from forming an electric shock due to the touch. Safety light device.

Light Emitting Diode (LED) is a solid-state light-emitting element made of semiconductor material. It has small volume, low heat generation, high illumination, low power consumption, suitable for mass production and long life. Therefore, at present, various lighting devices or backlight modules are widely used in the industry as light-emitting sources. Since the application of the light-emitting diode is more and more extensive, how to improve the luminous efficiency of the light-emitting diode or reduce the production cost to lower the selling price has become an important research and development target.

The driving circuit design of the AC-to-DC power conversion in the conventional LED lighting device is mainly of the type of switching power supply (Switching Power Supply). The so-called switching power supply is a semiconductor unit as a switching element, and uses Pulse Width Modulation (PWM) technology to control the on/off duty cycle of the semiconductor unit (Duty). Cycle), which in turn enables the output of the power supply to achieve a stable effect.

Switching power supplies can be mainly divided into isolated and non-isolated types depending on the application requirements. The isolated circuit is such that there is no physical circuit connection between the power input end and the output terminal of the applied LED component, but the voltage is outputted by the electromagnetic induction of the transformer to provide operation, that is, both ends thereof. There is electrical isolation between them; the opposite, non-isolated circuit has a physical circuit connection between its ends, that is, no electrical isolation. As far as current technology is concerned, Isolated circuits include architectures such as flyback, forward, push-pull, half-bridge, and full-bridge; non-isolated circuits include buck, boost (Boost) ) Architectures such as circuits and Buck-Boost circuits.

In order to reduce the development trend of the price of the light-emitting diode lighting device, most of the driving circuits in the device have been changed from the isolated design to the non-isolated type. Although the production cost of the isolated circuit is higher than that of the non-isolated circuit, due to its electrically isolated nature, the user does not form an electric shock by touching the light emitting diode element. When the lighting device is designed as a non-isolated circuit, there is a danger of electric shock or short circuit. Therefore, in order to comply with the safety regulations, the lighting device using the non-isolated circuit needs to be exposed, that is, the insulating casing is required as a shield to avoid the user touching it.

As far as the current technology is concerned, an illumination device using an isolated circuit can be made of a heat dissipating material such as aluminum or other metal as a material of its casing or external structure; however, an illumination device using a non-isolated circuit cannot use such an electrically conductive device. The material can only be completed by a non-conductive material such as heat-dissipating plastic, plastic or glass. However, because such materials such as plastic or glass are prone to chipping or breakage, the light-emitting diode elements are exposed; and if the light-emitting diode element continues to operate and emit light in this case, the user There is a possibility of electric shock due to touch, or even a risk of wire fire.

It is an object of the present invention to provide a security type light emitting device. The safety type illuminating device adopts a non-isolated circuit design, and the control unit and the safety detecting module are arranged to determine whether the housing is in a safe state, that is, whether the housing is broken or not. The situation. In detail, in a safe state, the safety type illuminating device can perform normal use and operation; but in an unsafe state, the control unit cuts off the power supply to stop the illuminating, so as to prevent the user from forming an electric shock due to the touch. .

The invention is a safety light-emitting device, comprising: a casing; a rectifying unit disposed in the casing for coupling an AC power source and outputting the same a power supply unit; an illumination unit disposed in the housing; a driving unit disposed in the housing for receiving the DC power output by the rectification unit to drive the illumination unit; a security detection module, setting a detection result is generated in the housing for detecting a physical state of the housing; and a control unit is disposed in the housing and electrically connected to the rectification unit, the driving unit, and the security detection The module is configured to receive the detection result, and process the detection result to determine whether the housing is in a safe state. If it is in an unsafe state, the control unit stops the driving unit from receiving the DC power.

According to the above concept, the control unit has a cut-off switch, and the cut-off relationship is a relay for controlling the electrical connection between the rectifying unit and the driving unit.

According to the above concept, wherein the unsafe state is that the casing is broken, and the casing is made of an insulating material of glass or plastic.

According to the above concept, the control unit processing the detection result includes analyzing a change of the detection result or comparing the detection result with a threshold value, where the physical state is air pressure, audio, vibration, Sound intensity or humidity.

According to the above concept, the security detection module includes a gas pressure detecting unit for detecting the air pressure in the housing and generating a gas pressure value, and the control unit analyzes the gas pressure value to change or equal to a gas pressure threshold value. The housing is judged to be in an unsafe state.

According to the above concept, the security detection module includes an audio detection unit for detecting sound in the housing and generating an audio value. When the audio value in the housing is greater than a sound frequency threshold, The control unit determines that the housing is in an unsecured state.

According to the above concept, the security detection module includes a sound intensity detecting unit for detecting sound in the housing and generating a sound intensity value when the sound intensity value in the housing is greater than a sound intensity threshold. At the time of the value, the control unit determines that the housing is in an unsafe state.

According to the above concept, the security detection module includes a vibration detection The measuring unit is configured to detect the vibration of the housing and generate a vibration frequency value. When the vibration frequency value of the housing is greater than a vibration frequency threshold, the control unit determines that the housing is in an unsafe state.

According to the above concept, the security detection module includes a humidity detecting unit for detecting humidity in the housing and generating a humidity value. When the humidity value in the housing is greater than a humidity threshold, The control unit determines that the housing is in an unsecured state.

According to the above concept, the driving unit is a non-isolated circuit of a step-down type circuit, a step-up type circuit or a down-boost type circuit.

Another aspect of the present invention is a safety light-emitting device, comprising: a housing; a rectifying unit disposed in the housing for coupling an AC power source and outputting a DC power source; a safety detection module disposed in the housing for detecting a physical state of the housing to generate a detection result; and a driving control circuit disposed in the housing The rectifying unit and the safety detecting module are electrically connected to receive the detection result and receive the DC power output by the rectifying unit to drive the lighting unit, and process the detection result to determine whether the housing is The safety state, if it is not safe, the drive control circuit stops receiving the DC power.

100, 100', 100", 200‧‧‧Safe lighting devices

10‧‧‧shell

11‧‧‧Rectifier unit

12‧‧‧Control unit

120‧‧‧ relay

13‧‧‧Drive unit

14‧‧‧Lighting unit

130‧‧‧Drive Control Circuit

15, 15', 15", 150‧‧‧ Security Detection Module

151‧‧‧Pneumatic detection unit

152‧‧‧Audio detection unit

153‧‧‧Vibration detection unit

154‧‧‧Sound intensity detection unit

155‧‧‧Humidity detection unit

20‧‧‧AC power supply

The first figure is a functional block diagram of the security type light-emitting device proposed by the first embodiment of the present invention.

The second figure (a) is a schematic diagram showing the relay in the control unit of the present invention in a conducting state.

The second figure (b) is a schematic diagram showing that the relay in the control unit of the present invention is in a non-conducting state.

The third figure is a functional block diagram of a security type light-emitting device proposed by another modified embodiment of the present invention.

The fourth figure is a safety type illumination proposed by the present invention in still another modified embodiment. A functional block diagram of the device.

The fifth figure is a functional block diagram of the security type light-emitting device proposed by the second embodiment of the present invention.

The implementation of the present invention will now be described in a first embodiment. Please refer to the first figure, which is a functional block diagram of a security type light-emitting device 100 proposed by the present invention. As shown in the figure, the security light-emitting device 100 includes a housing 10, a rectifying unit 11, a control unit 12, a driving unit 13, a lighting unit 14, and a security detecting module 15, and the figure is presented in the figure. The electrical connection relationship between the components is mutual. The rectifying unit 11, the control unit 12, the driving unit 13, the illuminating unit 14, and the security detecting module are all disposed in the casing 10, and the casing 10 is insulated by glass or plastic. Composition.

In detail, the security type light-emitting device 100 of the present invention is designed such that the rectifying unit 11 and the input end and the output end of the driving unit 13 are electrically connected in a non-isolated circuit. As can be seen from the prior art, in order to make the safety type illuminating device 100 of the present invention conform to the safety regulations, the related circuits and components are not exposed to prevent the user from being shocked by the touch, and the housing 10 is insulated using the same. Wrap it. In a practical design, the security light-emitting device 100 further includes a circuit board (not shown) disposed in the housing 10, and the related circuits and components can be disposed thereon. Placed in the housing 10.

Next, in this embodiment, the rectifying unit 11 is configured to couple an AC power source 20 and output a DC power source to provide a voltage to the relevant component for operation. The driving unit 13 can be a non-isolated circuit such as a buck circuit, a boost circuit or a buck-boost circuit, and can receive the rectifying unit. The DC power source outputted by 11 drives the light-emitting unit 14 to emit light. The light emitting unit 14 can include at least one light emitting diode.

The main feature of the security light-emitting device 100 of the present invention is that the operation of the overall device can be performed for the inside of the casing 10 by the combination of the control unit 12 and the safety detecting module 15 . control. The security The full detection module 15 can detect the relevant physical state of the housing 10 to generate a corresponding detection result, and the control unit 12 can receive and process the detection result for determining whether the housing 10 is safe. status. If it is determined to be in a safe state, the driving unit 13 still receives the DC power source to drive the lighting unit 14 to emit light; if it is determined to be in a non-safe state, the control unit 12 stops the driving unit 13 from receiving the DC power source. The driving of the light emitting unit 14 is stopped.

As described above, in the embodiment, the security detection module 15 includes three detection units; as shown, one air pressure detection unit 151, one audio detection unit 152, and one vibration detection. Unit 153. Therefore, the physical state corresponding to the three detecting units are respectively the air pressure, audio or vibration in the casing 10. As is apparent from the prior art, the casing 10 made of an insulating material made of glass or plastic is liable to be broken or broken. In general, the reason for this situation is mainly caused by the impact or collision of the whole device, so that the corresponding physical states of the above-mentioned several changes in the housing 10 can be detected by the relevant detection unit. And can know.

It can be seen that, in this embodiment, the safe state is that the housing 10 does not exhibit a rupture; in contrast, the non-safe state is that the housing 10 presents a rupture. The presentation of this rupture condition is determined by the control unit 12. In detail, the control unit 12 continuously receives the detection results of the detection units to analyze whether the change in the specific time cannot be maintained within the corresponding preset range; or The detection result is compared with the corresponding threshold value to analyze whether it is greater than, less than or equal to the threshold value at the time of detection. The following is a detailed description of the corresponding operation mode between each detection unit and the control unit 12.

First, since the casing 10 is broken, a hole may be formed to communicate with the outside and form an air flow, that is, the air pressure in the casing 10 is finally equal to the atmospheric pressure (for example, 1 atm). Therefore, the operation of the air pressure detecting unit 151 is such that the air pressure detecting unit 151 can continuously detect the air pressure in the housing 10 to generate a corresponding one of the air pressure values at the time of detecting; and the other side When the control unit 12 analyzes that the air pressure value changes or is equal to a gas pressure threshold, the housing 10 is judged to be in an unsafe state.

As described above, in this embodiment, after the safety light-emitting device 100 is designed, the air pressure in the casing 10 is less than 1 atmosphere, that is, the air pressure threshold is set to 1 atmosphere; and in normal operation or safety. In the state, the air pressure detecting unit 151 detects that the obtained air pressure value is less than 1 atmosphere. Therefore, when the casing 10 is broken, the air pressure detecting unit 151 detects that the obtained air pressure value is equal to the threshold value of 1 atmosphere, and the control unit 12 thus determines that it is in an unsafe state.

Alternatively, when the casing 10 is broken, the air pressure inside and outside the casing 10 may not be immediately balanced due to the small opening, but the air pressure value may still be slowly changed; therefore, it is also designed by the control unit 12 When the obtained air pressure value cannot be maintained within a predetermined range within a certain time period, it is determined to be in an unsafe state.

Secondly, since the casing 10 is broken, the crack may not be formed due to the crack, so that the change in the air pressure value does not occur. However, when there are minute cracks in the casing 10, it may be enlarged by further impact and collision. Such micro-cracks formed on the housing 10 may result from scratching of hard objects or sharp objects on their surfaces, and are typically formed with audio that is discernible or unrecognizable by the human ear due to scratching. Therefore, the operation of the audio detecting unit 152 is such that the audio detecting unit 152 can continuously detect the sound in the casing 10 to generate a corresponding audio value at the time of detecting; When the control unit 12 analyzes that the audio value is greater than a sound frequency threshold, it determines that the housing 10 is in an unsecured state.

As described above, in this embodiment, the sound frequency threshold is set to a range of 800 to 3000 Hertz (Hz). Therefore, when the audio detecting unit 152 detects that the audio value generated by the scratching on the surface of the casing 10 (and can be transmitted into the casing 10) is less than the range, the control unit 12 determines that it is at The security state is opposite. When the audio detection unit 152 detects that the obtained audio value falls within the range or is greater than the range, the control unit 12 determines that it is in an unsecured state. A crack of a micro crack is present on the casing 10.

It can be seen from the above that with the arrangement of the air pressure detecting unit 151 and the audio detecting unit 152, it is possible to have a corresponding judgment design for the housing 10 regardless of whether the crack generated is large or small. However, when the audio detecting unit 152 detects that the audio value generated on the surface of the casing 10 is smaller than the threshold value of the sound frequency, it is still possible to form a micro crack on the casing 10; that is, it is tiny. In addition to scratching, the formation of cracks may directly come from impacts and collisions on the device. Therefore, the vibration detecting unit 153 is configured to enable the vibration detecting unit 153 to continuously detect the vibration condition of the housing 10 to generate a corresponding vibration frequency value at the time of detecting; In one aspect, the control unit 12 determines that the vibration frequency value is greater than a vibration frequency threshold value, and determines that the housing 10 is in an unsafe state.

As described above, in the embodiment, the vibration detection system detects the vibration wave transmitted to the device, that is, detects the frequency or acceleration value of the relevant fluctuation. In detail, the vibration detecting unit 153 is a motion sensing component or an inertial sensor, and may be composed of such components of an accelerometer. The vibration wave (or acceleration) generated can be detected by the operation of the vibration detecting unit 153, and the vibration frequency threshold value can be set to an associated frequency value (Hz) or an acceleration value (g).

As shown in the first figure, in the embodiment, the three detection units, such as the air pressure detecting unit 151, the audio detecting unit 152, and the motion detecting unit 153, constitute the security detecting module 15 Description. In the normal state or in a safe state, the three detection units in the security detection module 15 can operate simultaneously; however, according to the above description, as long as there is a detection unit, the detection result is determined by When the control unit 12 determines that it is in an unsafe state, the drive unit 13 can stop receiving the DC power source. Therefore, in other embodiments, the security detection module may be designed by any one of the foregoing detection units, or may be composed of any two of the above detection units.

In addition, the control unit 12 is electrically connected to the rectifying unit 11, The driving unit 13 and the safety detecting module 15 and, in a safe state, the DC power supply is supplied to the driving unit 13 via the control unit 12 to drive the lighting unit 14. Please refer to the second figures (a) and (b); specifically, in this embodiment, the control unit 12 is designed to have a cut-off switch, and the cut-off relationship is a relay 120, so that the rectifier unit can be controlled. 11 is electrically connected to the drive unit 13.

As shown in the second figure (a) and (b), wherein the second figure (a) is a schematic diagram of the relay 120 in the control unit 12 being in a conducting state; and the second figure (b) The schematic diagram of the relay 120 in the control unit 12 is rendered non-conducting. The so-called on state, that is, the relay 120 appears as a short circuit (on); the so-called non-conduction state, that is, the relay 120 appears as an off. Therefore, when the control unit 12 determines that the housing 10 is in the safe state, the relay 120 is rendered in the conduction state shown in the second diagram (a) to complete the rectification unit 11 and the The electrical connection between the driving units 13; in contrast, when the control unit 12 determines that the housing 10 is in the non-safe state, the relay 120 is rendered in the second diagram (b) The conduction state is to cut off the electrical connection between the rectifying unit 11 and the driving unit 13.

On the other hand, in addition to the audio of the sound, the material of the casing 10 has a limit on the strength that the sound can withstand, that is, when the intensity (or volume) of the sound is larger, the casing 10 may be broken. Therefore, the strength of the sound can also be used as a physical state for judgment.

Therefore, in another modified embodiment, as shown in the functional block diagram of the security light-emitting device 100' of the third figure, a sound intensity detecting unit 154 can be designed to match the audio detecting unit 152. The threshold of the sound frequency threshold is set with a sound intensity threshold; for example, set to 100 decibels (dB) (this is the degree to which the human ear can produce pain). Therefore, the operation of the sound intensity detecting unit 154 is such that the sound in the casing 10 can be continuously detected to generate a corresponding sound intensity value at the time of detection; and, on the other hand, When the control unit 12 analyzes that the sound intensity value is greater than the sound intensity threshold value, the control unit 12 determines that the casing 10 is in an unsafe state.

On the other hand, in addition to the above physical states, the humidity in the casing 10 can be detected and similarly judged. For example, similar to the operation design of the air pressure detecting unit 151 described above, the air pressure in the casing 10 is evacuated or nearly vacuumed (or a gas that can be refilled with nitrogen or other moisture is exhausted), so that the shell The humidity in the body 10 is lowered or appears to be relatively dry; when the casing 10 is broken, a hole may be formed to communicate with the outside and form an air flow, which may also cause a change in the state of the internal humidity.

Therefore, in another modified embodiment, as shown in the functional block diagram of the security light-emitting device 100" of the fourth figure, the redesignable security detection module 15" includes a humidity detecting unit 155, which can continue The humidity in the casing 10 is detected to produce a corresponding one of the humidity values at the time of detection. In this embodiment, the safety light-emitting device 100 is designed to have a humidity of less than 40% in the housing 10, that is, a humidity threshold of 40% is set; and in a normal operating state or a safe state, The humidity detecting unit 155 detects that the obtained humidity value is less than 40%. Therefore, when the housing 10 is broken, the humidity detecting unit 155 detects the obtained humidity value due to the relatively humid air outside. The control unit 12 thus determines that it is in an unsafe state by flowing in a threshold value greater than 40%.

Of course, the security detection module designed in the first embodiment and the related variation embodiment can also be configured to perform operation and judgment only by setting any one of the detection units or the plurality of detection units. Furthermore, the present invention can also integrate the driving unit and the control unit to effectively simplify the circuit design on the circuit board under the same safety state judgment effect.

The implementation of the present invention will now be described in a second embodiment. Please refer to the fifth figure, which is a functional block diagram of a security type light-emitting device 200 proposed by the present invention. The components of the same function are denoted by the same reference numerals in comparison with the above embodiments; the difference is that the driving control circuit 130 is provided in the embodiment, and the operation of the driving control circuit 130 can be integrated in the above embodiments. The drive unit and the function of the control unit are designed as an integrated circuit. In addition, one of the security detection modules 150 may include at least one detection unit in each of the above embodiments, and can Continuous detection is performed to generate corresponding detection results.

Similarly, the driving control circuit 130 can receive the corresponding detection result and the DC power output from the receiving rectifying unit 11 to drive the lighting unit 14, and process the corresponding detection result to determine whether the housing 10 is in a safe state; In an unsafe state (ie, the housing 10 is broken), the drive control circuit 130 stops receiving the DC power source and stops driving the lighting unit 14.

In summary, for a light-emitting diode lighting device using a non-isolated circuit design, the safety light-emitting device proposed by the present invention can be set by the control unit and the safety detecting module in the device. It is correctly judged whether the casing of the device is in a safe state, that is, whether the casing is broken or not. As long as it is in a safe state, its device can be used and operated normally; however, if it is judged to be in an unsafe state, its control unit will immediately cut off the power supply to stop the illumination to avoid the user touching. Touched and formed an electric shock. Therefore, the present invention can effectively solve the related problems raised in the prior art and successfully achieve the main purpose of the development of the present case.

Any person skilled in the art can make use of the concepts and embodiment variations disclosed herein to form a basis for designing and improving other methods. These variations, substitutions and improvements are not to be construed as a departure from the scope of the invention as defined by the appended claims. It is to be understood that the present invention may be modified by those skilled in the art and may be modified as described in the appended claims.

100‧‧‧Safety lighting device

10‧‧‧shell

11‧‧‧Rectifier unit

12‧‧‧Control unit

13‧‧‧Drive unit

14‧‧‧Lighting unit

15‧‧‧Safety Detection Module

151‧‧‧Pneumatic detection unit

152‧‧‧Audio detection unit

153‧‧‧Vibration detection unit

20‧‧‧AC power supply

Claims (13)

A safety light-emitting device includes: a casing; a rectifying unit disposed in the casing for coupling an AC power source and outputting a DC power source; an illumination unit disposed in the casing; a driving The unit is disposed in the housing and configured to receive the DC power output by the rectifying unit to drive the lighting unit; a security detecting module is disposed in the housing to detect a physical body of the housing a detection result is generated; and a control unit is disposed in the housing and electrically connected to the rectification unit, the driving unit and the security detection module for receiving the detection result and processing the detection As a result, it is judged whether the casing is broken or not, and if it is broken, the control unit stops the driving unit from receiving the DC power. The security light-emitting device of claim 1, wherein the control unit has a cut-off switch for controlling an electrical connection between the rectifying unit and the driving unit. The security light-emitting device of claim 2, wherein the cut-off relationship is a relay. The security light-emitting device of claim 1, wherein the controlling unit processing the detection result comprises analyzing a change of the detection result or comparing the detection result with a threshold value. The security light-emitting device of claim 4, wherein the physical state is air pressure, audio, vibration, sound intensity or humidity in the housing. A security light-emitting device according to claim 5, wherein the security device The full detection module includes a gas pressure detecting unit for detecting the air pressure in the casing and generating a gas pressure value, and the control unit determines that the gas pressure value is changed or equal to a gas pressure threshold value, and the casing is determined to be The rupture appears. The security light-emitting device of claim 5, wherein the security detection module includes an audio detecting unit for detecting sound in the housing and generating an audio value in the housing. When the audio value is greater than a sound frequency threshold, the control unit determines that the housing is in a broken state. The security light-emitting device of claim 5, wherein the security detection module includes a vibration detecting unit for detecting vibration of the housing and generating a vibration frequency value when the housing is When the vibration frequency value is greater than a vibration frequency threshold, the control unit determines that the housing is in a broken state. The security light-emitting device of claim 5, wherein the security detection module includes a sound intensity detecting unit for detecting sound in the housing and generating a sound intensity value when the shell When the sound intensity value in the body is greater than a sound intensity threshold, the control unit determines that the housing is in a broken state. The security light-emitting device of claim 5, wherein the security detection module includes a humidity detecting unit for detecting humidity in the housing and generating a humidity value in the housing. When the humidity value is greater than a humidity threshold, the control unit determines that the housing is in a broken state. The security light-emitting device according to claim 1, wherein the driving unit is a non-isolated circuit of a step-down circuit, a step-up circuit or a down-boost circuit. The security light-emitting device according to claim 1, wherein the casing is made of an insulating material of glass or plastic. A safety light-emitting device includes: a casing; a rectifying unit disposed in the casing for coupling an AC power source and outputting a DC power source; an illumination unit disposed in the casing; a detection module disposed in the housing for detecting a physical state of the housing to generate a detection result; and a driving control circuit disposed in the housing and electrically connecting the rectifying unit and the The safety detection module is configured to receive the detection result and receive the DC power output by the rectifying unit to drive the illumination unit, and process the detection result to determine whether the housing is broken or not. The drive control circuit stops receiving the DC power source.