CN213638278U

CN213638278U - Sliding touch dimming LED table lamp

Info

Publication number: CN213638278U
Application number: CN202022843968.4U
Authority: CN
Inventors: 张一浩
Original assignee: Wuxi Xunchi Electronic Technology Co ltd
Current assignee: Wuxi Xunchi Electronic Technology Co ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-07-06
Anticipated expiration: 2030-12-01

Abstract

The utility model provides a slide touch-control LED table lamp of adjusting luminance, include the desk lamp shell and set up the desk lamp circuit system in the desk lamp shell. The desk lamp circuit system comprises an LED unit array, a power circuit and a touch control circuit. The LED unit array comprises a plurality of LED units arranged in parallel. The power circuit is connected with commercial power through an external direct current adapter and used for supplying power for the LED unit array and the touch control circuit at the same time. The touch control circuit is used for responding to the sliding touch action of a user and adjusting the number of the LED units in the luminous state in the LED unit array. According to the utility model discloses, can solve current knob formula LED table lamp of adjusting luminance effectively and adjust luminance the fineness poor, the inconvenient problem of operation of adjusting luminance.

Description

Sliding touch dimming LED table lamp

Technical Field

The utility model belongs to the technical field of the lamps and lanterns illumination, more specifically relates to a LED table lamp is adjusted luminance in slip touch-control.

Background

As a novel light source, the LED has the advantages of quick response, no stroboflash, easiness in integration, long service life, energy conservation, environmental friendliness and the like. There is a certain trend for LEDs to replace incandescent or fluorescent lamps as a light source for table lamps. Currently, a small number of table lamps using LEDs as light sources are on the market. The LED table lamps mainly comprise LED lamp strings, a lamp shell, a power converter, a constant voltage module and a switch, wherein the power converter is connected to mains supply and used for converting mains supply voltage into direct current voltage required by the LED lamp strings. The DC voltage output by the power converter is processed by the constant voltage of the constant voltage module to drive the LED lamp string to emit light. The switch usually adopts a push-button switch or a knob switch, wherein the push-button switch only has a mechanical switch function and does not have a dimming function, and the knob switch has both the mechanical switch function and the dimming function, but the dimming degree is not fine enough, and only simple stepping dimming can be performed. In addition, it is not easy to operate when the knob switch is used for dimming.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the current knob formula LED table lamp of adjusting luminance the fineness of adjusting luminance poor, the inconvenient problem of operation of adjusting luminance.

In order to realize the above purpose, the utility model provides a LED table lamp is adjusted luminance in slip touch-control.

The utility model discloses a sliding touch control dimming LED table lamp comprises a table lamp shell and a table lamp circuit system arranged in the table lamp shell, wherein the table lamp circuit system comprises an LED unit array, a power circuit and a touch control circuit;

the LED unit array comprises a plurality of LED units which are arranged in parallel;

the power circuit is connected with commercial power through an external direct current adapter and is used for simultaneously supplying power to the LED unit array and the touch control circuit;

the touch control circuit is used for responding to the sliding touch action of a user and adjusting the number of the LED units in the LED unit array in a light-emitting state.

Preferably, the LED unit includes a plurality of LED series branches, a switching element, a first current limiting resistor, and a pull-down resistor;

the plurality of LED series branches are arranged in parallel;

the common end of the current input ends of the LED serial branches is the current input end of the LED unit;

the current output ends of the LED series branches are connected with the current input end of the switch element;

a level signal input end of the switching element is simultaneously connected with a first end of the first current limiting resistor and a first end of the pull-down resistor;

the second end of the first current limiting resistor is a control signal input end of the LED unit;

and the common end of the current output end of the switch element and the second end of the pull-down resistor is the current output end of the LED unit.

Preferably, the LED unit includes a first LED series branch and a second LED series branch, and each of the first LED series branch and the second LED series branch includes three light emitting diodes.

Preferably, the first LED series branch further includes a second current limiting resistor, and the second LED series branch further includes a third current limiting resistor.

Preferably, the switching element is an NMOS transistor or an NPN transistor.

Preferably, the power circuit is a single-input dual-output power circuit, and is configured to provide corresponding operating voltages to the LED unit array and the touch control circuit at the same time.

Preferably, the power supply circuit comprises a voltage boosting module and a voltage reducing module;

when the input voltage of the power circuit is DC5V, the boost module is configured to divide a DC5V voltage signal into two paths, and convert a first path of DC5V voltage signal into a DC12V voltage signal, where the DC12V voltage signal is used to supply power to the LED unit array, and a second path of DC5V voltage signal is used to supply power to the touch control circuit;

when the input voltage of the power circuit is DC12V, the voltage dropping module is configured to divide a DC12V voltage signal into two paths, and convert a first path of the DC12V voltage signal into a DC5V voltage signal, where the DC5V voltage signal is used to supply power to the touch control circuit, and a second path of the DC12V voltage signal is used to supply power to the LED unit array.

Preferably, the power supply circuit further comprises a DC5V input interface, a DC12V input interface and a DC5V/12V output interface;

the DC5V input interface is simultaneously connected with the boosting module and the DC5V/12V output interface;

the DC12V input interface is simultaneously connected with the voltage reduction module and the DC5V/12V output interface;

the DC5V/12V output interface is a three-terminal output interface.

Preferably, the touch control circuit comprises a touch sensing module and a control module;

the touch sensing module is connected with the control module and used for sensing the sliding touch action of a user;

and a plurality of control signal output ends of the control module are respectively connected with the control signal input ends of the plurality of LED units.

Preferably, the touch sensing module is implemented by a pad array, and the control module is implemented by a single chip microcomputer.

The beneficial effects of the utility model reside in that:

the utility model discloses a LED table lamp is adjusted luminance in slip touch-control adopts touch control circuit to replace the knob of adjusting luminance of current knob formula LED table lamp of adjusting luminance. The touch control circuit can make quick response to sliding touch action of a user, and correspondingly adjusts the number of the LED units in a light-emitting state in the LED unit array so as to realize fine dimming of the LED table lamp. On the other hand, based on the touch control circuit, the user can realize dimming only through corresponding sliding touch action, and the dimming operation is convenient and fast. Therefore, the utility model discloses a sliding touch-control LED table lamp of adjusting luminance can solve current knob formula LED table lamp of adjusting luminance effectively and adjust luminance the fineness poor, the inconvenient problem of operation of adjusting luminance.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.

Fig. 1 shows a schematic block diagram of a desk lamp circuitry according to an embodiment of the present invention.

Fig. 2 shows a schematic circuit diagram of an LED unit array according to an embodiment of the present invention.

Fig. 3 shows a circuit schematic of a power supply circuit according to an embodiment of the invention.

Fig. 4 shows a circuit schematic of a touch control circuit according to an embodiment of the present invention.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Example (b): fig. 1 shows a schematic block diagram of a desk lamp circuit system of the present embodiment. Referring to fig. 1, the sliding touch dimming LED desk lamp of the present embodiment includes a desk lamp housing and a desk lamp circuit system disposed in the desk lamp housing;

the desk lamp circuit system comprises an LED unit array, a power circuit and a touch control circuit;

the touch control circuit is used for responding to the sliding touch action of a user and adjusting the number of the LED units in the luminous state in the LED unit array.

In this embodiment, the LED unit includes a plurality of LED serial branches, a switching element, a first current limiting resistor, and a pull-down resistor;

the plurality of LED series branches are arranged in parallel;

the common end of the current input ends of the LED series branches is the current input end of the LED unit;

the level signal input end of the switching element is simultaneously connected with the first end of the first current limiting resistor and the first end of the pull-down resistor;

and the common end of the current output end of the switching element and the second end of the pull-down resistor is the current output end of the LED unit.

In this embodiment, the LED unit includes a first LED series branch and a second LED series branch, and the first LED series branch and the second LED series branch each include three light emitting diodes.

In this embodiment, the first LED series branch further includes a second current limiting resistor, and the second LED series branch further includes a third current limiting resistor.

In this embodiment, the switching element is an NMOS transistor or an NPN transistor.

In this embodiment, the power supply circuit is a single-input dual-output power supply circuit, and is configured to provide corresponding operating voltages for the LED unit array and the touch control circuit at the same time.

In this embodiment, the power circuit includes a voltage boosting module and a voltage dropping module;

when the input voltage of the power circuit is DC5V, the boost module is used for dividing a DC5V voltage signal into two paths, and converting a first path of DC5V voltage signal into a DC12V voltage signal, wherein the DC12V voltage signal is used for supplying power to the LED unit array, and a second path of DC5V voltage signal is used for supplying power to the touch control circuit;

when the input voltage of the power circuit is DC12V, the voltage dropping module is configured to divide a DC12V voltage signal into two paths, and convert a first path of the DC12V voltage signal into a DC5V voltage signal, where the DC5V voltage signal is used to power the touch control circuit, and a second path of the DC12V voltage signal is used to power the LED unit array.

In this embodiment, the power circuit further includes a DC5V input interface, a DC12V input interface, and a DC5V/12V output interface;

the DC5V input interface is simultaneously connected with the boost module and the DC5V/12V output interface;

the DC5V/12V output interface is a three-terminal output interface.

In this embodiment, the touch control circuit includes a touch sensing module and a control module;

In this embodiment, the touch sensing module is implemented by using a pad array, and the control module is implemented by using a single chip microcomputer.

Fig. 2 shows a schematic circuit diagram of the LED unit array of the present embodiment, fig. 3 shows a schematic circuit diagram of the power supply circuit of the present embodiment, and fig. 4 shows a schematic circuit diagram of the touch control circuit of the present embodiment. The sliding touch dimming LED table lamp of the present embodiment is described in more detail below with reference to fig. 2 to 4:

the interface CN3 of the power circuit is connected with the interface CN1 of the LED unit array, and the interface CN2 of the LED unit array is connected with the interface CN1 of the touch control circuit, so as to form an integral circuit of the desk lamp circuit system.

A power supply circuit: by adopting a DC-DC scheme, the interface CN1 is a DC12V input interface, the interface CN2 is a DC5V input interface (Type C), the interface CN3 is a DC5V/12V output interface, the boosting module is realized by a SY7208C boosting chip and a peripheral circuit thereof, and the voltage reduction module is realized by a 7805 voltage stabilizing chip and a peripheral circuit thereof. When the interface CN2 is powered on, the boost module divides the input DC5V voltage signal into two paths, and converts the first path of DC5V voltage signal into a DC12V voltage signal, where the DC12V voltage signal is used to supply power to the LED unit array, and the second path of DC5V voltage signal is used to supply power to the touch control circuit. In a peripheral circuit of the SY7208C voltage boosting chip, an electrolytic capacitor EC2 is a filter capacitor, an inductor L1 is an energy storage inductor, and a diode D1 is a rectifying diode. When the interface CN1 is powered on, the voltage dropping module divides the input DC12V voltage signal into two paths, and converts the first path of DC12V voltage signal into a DC5V voltage signal, where the DC5V voltage signal is used to supply power to the touch control circuit, and the second path of DC12V voltage signal is used to supply power to the LED unit array. Wherein, 7805 steady voltage chip is used for stepping down, and in 7805 steady voltage chip's peripheral circuit, electrolytic capacitor EC1 and electric capacity C2 all play the effect of filtering.

The touch control circuit: the control module is realized by adopting a single chip microcomputer U1 and peripheral circuits thereof, and the touch sensing module is realized by adopting a PAD array which comprises a PAD PAD 1-a PAD PAD 8. When a user slides the touch pad array, a parasitic capacitance effect is formed between the finger of the user and the pad, and the single chip microcomputer U1 outputs a PWM control signal to the outside in response to the parasitic capacitance signal.

LED unit array: comprising 8 LED units, each LED unit comprising 6 LEDs (3 strings 2 parallel). When a user finger slides and touches the PAD PAD1, the corresponding IO port of the single chip microcomputer U1 outputs a PWM control signal (high level) to the first LED unit, and after receiving the PWM control signal, a switch element in the first LED unit is conducted, and the first LED unit is grounded and is lightened. The lighting patterns of the other LED units coincide with the lighting pattern of the first LED unit. Under the condition that all the 8 LED units are lighted, when a user touches the PAD PAD8 by a finger in a sliding manner, the corresponding IO port of the single chip microcomputer U1 outputs a PWM control signal (low level) to the eighth LED unit, and after receiving the PWM control signal, the switch element of the eighth LED unit is turned off, the eighth LED unit cannot be grounded, so that an electric circuit of the eighth LED unit is disconnected, and the eighth LED unit is turned off. The other LED units are turned off in the same manner as the eighth LED unit.

The sliding touch dimming LED table lamp adopts the LED light source, saves energy and has long service life; be provided with the induction zone corresponding with the pad array on the desk lamp shell, when user's hand slides to the bottom from the top in induction zone the light of LED desk lamp is by bright dim sum until closing, when user's hand slides to the top from the bottom in induction zone the LED desk lamp is opened and light is brightened by dark, the control of being convenient for.

While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A sliding touch dimming LED table lamp comprises a table lamp shell and a table lamp circuit system arranged in the table lamp shell, and is characterized in that the table lamp circuit system comprises an LED unit array, a power circuit and a touch control circuit;

2. The sliding touch dimming LED desk lamp of claim 1, wherein the LED unit comprises a plurality of LED series branches, a switching element, a first current limiting resistor and a pull-down resistor;

the plurality of LED series branches are arranged in parallel;

3. The sliding touch dimming LED desk lamp of claim 2, wherein the LED unit comprises a first LED series branch and a second LED series branch, each of the first LED series branch and the second LED series branch comprising three light emitting diodes.

4. The sliding touch dimming LED desk lamp of claim 3, wherein the first LED series branch further comprises a second current limiting resistor, and the second LED series branch further comprises a third current limiting resistor.

5. The sliding touch dimming LED desk lamp of claim 2, wherein the switching element is an NMOS transistor or an NPN transistor.

6. The sliding touch dimming LED desk lamp of claim 1, wherein the power circuit is a single-input dual-output power circuit for providing corresponding operating voltages for the LED unit array and the touch control circuit at the same time.

7. The sliding touch dimming LED desk lamp of claim 6, wherein the power circuit comprises a boost module and a buck module;

8. The sliding touch dimming LED desk lamp of claim 7, wherein the power circuit further comprises a DC5V input interface, a DC12V input interface, and a DC5V/12V output interface;

the DC5V/12V output interface is a three-terminal output interface.

9. The sliding touch dimming LED desk lamp of claim 1, wherein the touch control circuit comprises a touch sensing module and a control module;

10. The sliding touch dimming LED desk lamp of claim 9, wherein the touch sensing module is implemented using a pad array, and the control module is implemented using a single chip microcomputer.