CN102307413B - Method and device for displaying any color by using RGB (Red, Green and Blue) three-color indicating lamps - Google Patents
Method and device for displaying any color by using RGB (Red, Green and Blue) three-color indicating lamps Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a method and device for displaying any color by using RGB (Red, Green and Blue) three-color indicating lamps. The device comprises RGB three-color indicating lamps and a control circuit for controlling the on-off of the indicating lamps, wherein the control circuit is used for mixing light with different colors by adjusting the lightening duration time of the RGB three-color indicating lamps during the set period; and the set period is required to be shorter or equal to the vision retentivity time of a human eye. According to the method and device disclosed by the invention, the design idea of pulse width modulation is adopted; and the display of different colors is realized by using the vision retentivity time of the human eye and adjusting the lightening time of the RGB three-color indicating lamps during each period. Therefore, abundant indicating colors can be acquired on the basis of effectively controlling the cost of device hardware; and the defects that display colors are relatively monotonous and abundant colors cannot be indicated in the traditional control manner are overcome.
Description
Technical field
The invention belongs to indicator light control technology field, specifically, relate to a kind of indicator light mixed display of three kinds of colors of RGB of can utilizing and go out the method for random color and utilize the RGB tri-colour LED to show the device of random color.
Background technology
For the device that has deixis at present, such as television set, set-top box, air conditioner etc., generally all be to adopt LED to carry out luminous indication.Traditional indicator light circuit use usually RGB LED by the LED of control R, G, three kinds of different colours of B light respectively or light simultaneously in twos, also or the mode lighted simultaneously of three LED obtain the light of maximum 7 kinds of colors.This traditional control mode Show Color is dull relatively, can not take full advantage of the color function of RGB LED, can not indicate abundant relatively color.
Summary of the invention
The object of the present invention is to provide a kind of RGB of utilization tri-colour LED to show the method for random color, can effectively solve the dull relatively problem of traditional indicator light control mode Show Color.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of method of utilizing the RGB tri-colour LED to show random color is namely by regulating the light that the duration blends different colours of lighting of three kinds of color indicator lights of RGB in the setting cycle; Described setting cycle persists the time smaller or equal to human eye vision.
Further, utilize the pwm signal in cycles such as three tunnel that the RGB tri-colour LED is controlled, recently regulate the duration of lighting of three kinds of color indicator lights of RGB by the duty of regulating three road pwm signals; The cycle of described three road pwm signals equals described setting cycle, and each zero hour in cycle of three road pwm signals is identical.
Further again, described three road pwm signals cooperate a waveform maker to generate by four timers; One of them timer is cycle timer, is unit circulation timing with described setting cycle, and each timing when arriving setting cycle respectively to other three timers and waveform maker output cycle arriving signal; Described other three timers are respectively R, G, B lights time timer, respectively the light duration of three kinds of color indicator lights of RGB in each setting cycle carried out timing, and when timing time arrives the output black out signal to described waveform maker, in the cycle that the receives reclocking that resets during arriving signal; The level state that described waveform maker is put three tunnel control signals during arriving signal in the cycle that receives is respectively the significant level of lighting for three kinds of color indicator lights of control RGB, and when receiving black out signal, one tunnel control signal of putting this road black out signal institute corresponding color transfers the inactive level state to, and three tunnel control signals of Sheng Chenging are three road pwm signals thus.
Preferably, described four timers and waveform maker are integrated among the MCU, namely generate described three road pwm signals by a MCU; Described RGB tri-colour LED is RGB LED; Described three road pwm signals are controlled the light on and off of RGB tri-colour LED respectively by the switch element break-make of control connection in RGB tri-colour LED current supply circuit.
Further again, in order to blend desirable color, described setting cycle is preferably less than 100 milliseconds, preferably less than 50 milliseconds.
The present invention provides a kind of RGB of utilization tri-colour LED to show the device of random color simultaneously, comprise the indicator light of three kinds of colors of RGB and be used for the control circuit of the described indicator light light on and off of control that described control circuit is by regulating the light that the duration blends different colours of lighting of three kinds of color indicator lights of RGB in the setting cycle; Described setting cycle should persist the time smaller or equal to human eye vision.Namely adopt the mentality of designing of pulse width modulation, utilize the visual persistence effect of human eye, realize that by the time of lighting of regulating every kind of color indicator light in each cycle different colors shows.
Further, the pwm signal that described control circuit is exported the cycles such as three tunnel is the switch element break-make of control connection in RGB tri-colour LED current supply circuit respectively, and then recently regulate the duration of lighting of three kinds of color indicator lights of RGB by the duty of regulating three road pwm signals; The cycle of described three road pwm signals equals described setting cycle, and the zero hour in cycle of three road pwm signals is identical.
Further again, in described control circuit, comprise four timers and a waveform maker; One of them timer is cycle timer, is unit circulation timing with described setting cycle, and each timing when arriving setting cycle respectively to other three timers and waveform maker output cycle arriving signal; Described other three timers are respectively R, G, B lights time timer, respectively the light duration of three kinds of color indicator lights of RGB in each setting cycle carried out timing, and when timing time arrives the output black out signal to described waveform maker, in the cycle that the receives reclocking that resets during arriving signal; The level state that described waveform maker is put three tunnel control signals during arriving signal in the cycle that receives is respectively the significant level of lighting for three kinds of color indicator lights of control RGB, and when receiving black out signal, one tunnel control signal of putting this road black out signal institute corresponding color transfers the inactive level state to, and described three tunnel control signals namely form three road pwm signals.
Preferably, described four timers and waveform maker are integrated among the MCU; Described RGB tri-colour LED is RGB LED; Described switch element is transistor, field effect transistor or controllable silicon.
Further, in order to blend desirable color, described setting cycle is preferably less than 100 milliseconds, preferably less than 50 milliseconds.
Compared with prior art, advantage of the present invention and good effect are: the present invention utilizes the indicator light of three kinds of colors of RGB, the duration of lighting by every kind of color indicator light in the adjusting setting cycle is mixed the light that generates different colours, thereby need not to increase under the prerequisite of hardware cost, obtained abundant indication color, it is dull relatively to have overcome the traditional control method Show Color, can not indicate the deficiency of rich colors.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is the circuit theory diagrams that utilize a kind of embodiment of the device that the RGB tri-colour LED shows random color proposed by the invention;
Fig. 2 be in the setting cycle three kinds of color indicator lights light the duration oscillogram.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is done explanation in further detail.
At first set forth the mentality of designing of present embodiment: present embodiment utilizes the indicator light of three kinds of colors of RGB to show that the method for random color is to realize by the duration of lighting of RGB tri-colour LED in the adjusting setting cycle, just adopted the control thought of pulse-width modulation (PWM), utilize pwm signal to control the tri-colour LED light on and off, recently change the RGB tri-colour LED by the duty of regulating three road pwm signals and in each setting cycle, light sequential, and then by the visual persistence effect of human eye, color refreshing frequency by setting suits the requirements realizes the demonstration of different colours.
Specifically, be exactly that the indicator light of three kinds of colors is set the identical refresh cycle, the cycle that namely is used for three road pwm signals of control RGB tri-colour LED light on and off equates, is setting cycle T, referring to shown in Figure 2; With zero hour refresh cycle of three kinds of color indicator lights as the benchmark of three road pwm signals constantly and identical, namely the zero hour in cycle of three road pwm signals is identical.Duty ratio at color settings three road pwm signals to display, be RGB tri-colour LED lighting the duration in setting cycle T, be designated as Tr respectively, Tg, Tb, controlling the RGB tri-colour LED in the zero hour of each color refresh cycle lights, Tr after each refresh cycle begins, Tg, Tb constantly controls the RGB tri-colour LED respectively and extinguishes, in each cycle, repeat identical operations, when the refresh cycle (being setting cycle T) be less than or equal to human eye vision persist the time time, because the visual persistence effect of human eye can be seen the color after synthesizing.By regulating the value of Tr, Tg, Tb, can demonstrate different colors.
For example: when Tr=T, Tg=0, Tb=0, show red; When Tr=0, Tg=T, Tb=0, show green; When Tr=0, Tg=0, Tb=T, show blue; When Tr=T, Tg=T, Tb=0, show yellow; When Tr=0, Tg=T, Tb=T, show dark green; When Tr=T, Tg=0, Tb=T, show rose; When Tr=T, Tg=T, Tb=T, display white; When Tr, Tg, Tb are non-0 and during non-T value, then can demonstrate different colours such as pink colour, grey, crocus.
Can adopt a microprocessor MCU with clocking capability to utilize the mode of software programming to produce and export for the generation of three road pwm signals, can adopt discrete device to set up to generate yet, present embodiment does not specifically limit this.
Fig. 1 shows the control circuit that a kind of RGB of utilization tri-colour LED shows random color, comprises four timers and a waveform maker.Wherein, timer 0 is cycle timer, is unit circulation timing with setting cycle T, respectively with timer 1, timer 2, timer 3 with the waveform maker is corresponding is connected.The timing time that defines described timer 1, timer 2, timer 3 is respectively i.e. indicator light the lighting the duration in each setting cycle of three kinds of colors of Tr, Tg, Tb(), connect described waveform maker respectively.When the each timing of timer 0 arrived setting cycle T, output cycle arriving signal S0 transferred to timer 1,2,3 and the waveform maker respectively, and zero clearing restarts timing then.Described three timers 1,2,3 reset at every turn when receiving cycle arriving signal S0 and restart timing, and respectively when timing arrives Tr, Tg, Tb, output black out signal S1, S2, S3 transfer to described waveform maker.Described waveform maker utilizes its three lead-out terminal outputs to be used for three tunnel control signal PWM1, PWM2, the PWM3 of the light on and off of control RGB tri-colour LED, and the level state of putting three tunnel control signals when receiving cycle arriving signal S0 is respectively for controlling the significant level that three kinds of color indicator lights of RGB are lighted, such as high level; And when receiving black out signal S1, S2 or S3, one tunnel control signal of putting this road black out signal institute corresponding color transfers the inactive level state to, such as low level, forms three road pwm signals thus, for example waveform shown in Figure 2.
If three road pwm signals by the output of waveform maker have enough driving forces, then can directly described three road lead-out terminals of waveform maker be connected to the anode of three RGB indicator light LED_R, LED_G, LED_B respectively, described indicator light is that example describes with RGB LED, as shown in Figure 1, the minus earth of three RGB indicator lights.When the pwm signal by the output of waveform maker was high level, connected one road indicator light was lighted; When the pwm signal by the output of waveform maker was low level, connected one road indicator light extinguished, and has realized tri-colour LED is lighted effective control of sequential thus.
Certainly, also can be in the current supply circuit of RGB tri-colour LED LED_R, LED_G, LED_B the tandem tap element, such as transistor, field effect transistor, controllable silicon etc., present embodiment is that example describes with NPN type triode V1, V2, V3, as shown in Figure 1.With the base stage of triode V1, V2, V3 respectively with the corresponding connection of three road lead-out terminals of waveform maker, receive three road pwm signal PWM1, PWM2, the PWM3 of the output of waveform maker, control triode V1, V2, V3 saturation conduction or end.The collector electrode of described triode V1, V2, V3 is connected DC power supply VCC, emitter respectively with the corresponding connection of anode of tri-colour LED LED_R, LED_G, LED_B, the minus earth of tri-colour LED LED_R, LED_G, LED_B.When triode V1, V2, the controlled conducting of V3, electroluminescence on the connected indicator light; When triode V1, V2, V3 controlled by the time, connected indicator light outage is extinguished, and can realize tri-colour LED LED_R, LED_G, LED_B are lighted effective control of sequential thus equally, reaches the purpose that shows random color.
As a kind of preferred design, present embodiment preferably adopts a microprocessor MCU who is integrated with described four timers and waveform maker to carry out circuit design, even with the MCU with timing function, utilize the reference clock of MCU to count, and then the mode by programming generate required setting cycle T and RGB tri-colour LED light duration T r, Tg, Tb, by required three road pwm signal PWM1, PWM2, the PWM3 of three road I/O mouths output of MCU.
Relevant with the minimum timing chronomere of the timer of the MCU of use for the degree of enriching that color shows.The minimum timing time of supposing timer is the s millisecond, and setting cycle is the T millisecond, and then RGB LED can demonstrate the 3 power kind different colours of (T/s) by this programme.
In order to obtain desirable display effect, described setting cycle T is preferably less than 100 milliseconds, preferably less than 50 milliseconds, and for example 30 milliseconds, 20 milliseconds etc., to realize the stable demonstration of blend color.
The employing RGB tri-colour LED of present embodiment is shown that the method for random color and circuit application are in the device with deixis, such as television set, set-top box etc., can be on the basis of effective control device hardware cost, obtain abundant indication color, to satisfy different consumers' aesthetic requirement.
Certainly; above-mentioned explanation is not to be limitation of the present invention; the present invention also is not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.
Claims (2)
1. a method of utilizing the RGB tri-colour LED to show random color is characterized in that: by the light that the duration blends different colours of lighting of three kinds of color indicator lights of RGB in the adjusting setting cycle; Described setting cycle persists the time smaller or equal to human eye vision; Utilize the pwm signal in cycles such as three tunnel that the RGB tri-colour LED is controlled, recently regulate the duration of lighting of three kinds of color indicator lights of RGB by the duty of regulating three road pwm signals; The cycle of described three road pwm signals equals described setting cycle, and each zero hour in cycle of three road pwm signals is identical; Described three road pwm signals cooperate a waveform maker to generate by four timers; One of them timer is cycle timer, is unit circulation timing with described setting cycle, and each timing when arriving setting cycle respectively to other three timers and waveform maker output cycle arriving signal; Described other three timers are respectively R, G, B lights time timer, respectively the light duration of three kinds of color indicator lights of RGB in each setting cycle carried out timing, and when timing time arrives the output black out signal to described waveform maker, in the cycle that the receives reclocking that resets during arriving signal; The level state that described waveform maker is put three tunnel control signals during arriving signal in the cycle that receives is respectively the significant level of lighting for three kinds of color indicator lights of control RGB, and when receiving black out signal, one tunnel control signal of putting this road black out signal institute corresponding color transfers the inactive level state to, and described three tunnel control signals namely form three road pwm signals.
2. method according to claim 1, it is characterized in that: described four timers and waveform maker are integrated among the MCU; Described RGB tri-colour LED is RGB LED; Described three road pwm signals are controlled the light on and off of RGB tri-colour LED respectively by the switch element break-make of control connection in RGB tri-colour LED current supply circuit.
3. method according to claim 1 and 2, it is characterized in that: described setting cycle is less than 100 milliseconds.
4. device that utilizes the RGB tri-colour LED to show random color, it is characterized in that: comprise the indicator light of three kinds of colors of RGB and be used for the control circuit of the described indicator light light on and off of control that described control circuit is by regulating the light that the duration blends different colours of lighting of three kinds of color indicator lights of RGB in the setting cycle; Described setting cycle persists the time smaller or equal to human eye vision; The pwm signal that described control circuit is exported the cycles such as three tunnel is the switch element break-make of control connection in RGB tri-colour LED current supply circuit respectively, and then recently regulate the duration of lighting of three kinds of color indicator lights of RGB by the duty of regulating three road pwm signals; The cycle of described three road pwm signals equals described setting cycle, and the zero hour in cycle of three road pwm signals is identical; In described control circuit, comprise four timers and a waveform maker; One of them timer is cycle timer, is unit circulation timing with described setting cycle, and each timing when arriving setting cycle respectively to other three timers and waveform maker output cycle arriving signal; Described other three timers are respectively R, G, B lights time timer, respectively the light duration of three kinds of color indicator lights of RGB in each setting cycle carried out timing, and when timing time arrives the output black out signal to described waveform maker, in the cycle that the receives reclocking that resets during arriving signal; The level state that described waveform maker is put three tunnel control signals during arriving signal in the cycle that receives is respectively the significant level of lighting for three kinds of color indicator lights of control RGB, and when receiving black out signal, one tunnel control signal of putting this road black out signal institute corresponding color transfers the inactive level state to, and described three tunnel control signals namely form three road pwm signals.
5. device according to claim 4, it is characterized in that: described four timers and waveform maker are integrated among the MCU; Described RGB tri-colour LED is RGB LED; Described switch element is transistor, field effect transistor or controllable silicon.
6. according to claim 4 or 5 described devices, it is characterized in that: described setting cycle is less than 100 milliseconds.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106017688A (en) * | 2016-05-16 | 2016-10-12 | 上海理工大学 | Electronic color card based on multicolor light source color matching |
| CN107041038A (en) * | 2017-04-27 | 2017-08-11 | 维沃移动通信有限公司 | The control method and mobile terminal of a kind of breath light |
| JP6959273B2 (en) * | 2019-01-31 | 2021-11-02 | 矢崎総業株式会社 | Control device, lighting device, and control device program |
| CN110582139B (en) * | 2019-09-17 | 2022-10-14 | 四川长虹电器股份有限公司 | System and method for realizing multi-scene display of television based on single colorful LED |
| CN110708787B (en) * | 2019-09-20 | 2022-06-07 | 苏州浪潮智能科技有限公司 | A control device and method for a two-color lamp, storage medium and equipment |
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| CN113312506B (en) * | 2021-05-28 | 2024-07-05 | 东风汽车有限公司东风日产乘用车公司 | Lighting device control method, storage medium, and electronic apparatus |
| CN116761297A (en) * | 2022-04-06 | 2023-09-15 | 圣奥科技股份有限公司 | Interactive lamplight sedentary reminding lifting table control system |
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