CN102307413A - 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 PDF

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Publication number
CN102307413A
CN102307413A CN201110150497A CN201110150497A CN102307413A CN 102307413 A CN102307413 A CN 102307413A CN 201110150497 A CN201110150497 A CN 201110150497A CN 201110150497 A CN201110150497 A CN 201110150497A CN 102307413 A CN102307413 A CN 102307413A
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rgb
cycle
color
signal
light
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CN102307413B (en
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杨夫星
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection

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

Utilize the RGB tri-colour LED to show the method and the device of random color
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,, generally all be to adopt LED to carry out luminous indication such as television set, set-top box, air conditioner etc.Traditional indicator light circuit use usually RGB LED through 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 make full use 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 adopts following technical scheme to be achieved:
A kind of method of utilizing the RGB tri-colour LED to show random color is promptly through regulating the light that the duration blends different colours of lighting of three kinds of color indicator lights of RGB in the setting cycle; Said 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 through the duty of regulating three road pwm signals; The cycle of said 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 a cycle timer, is unit circulation timing with described setting cycle, and each timing is exported the cycle arriving signal to other three timers and waveform maker respectively when arriving setting cycle; Described other three timers are respectively R, G, B and light 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 said waveform maker is put three tunnel control signals during arriving signal in the cycle that receives is respectively and is used to control the significant level that three kinds of color indicator lights of RGB are lighted; 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, promptly generate described three road pwm signals through a MCU; Described RGB tri-colour LED is RGB LED; Said three road pwm signals control respectively the light on and off of RGB tri-colour LED through 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; The indicator light and the control circuit that is used to control said indicator light light on and off that comprise three kinds of colors of RGB, said control circuit is through 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 should persist the time smaller or equal to human eye vision.Promptly adopt the mentality of designing of pulse width modulation, utilize the visual persistence effect of human eye, realize that through the time of lighting of regulating every kind of color indicator light in each cycle various colors shows.
Further; The pwm signal that said 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 through the duty of regulating three road pwm signals; The cycle of said three road pwm signals equals described setting cycle, and the zero hour in cycle of three road pwm signals is identical.
Further again, in said control circuit, comprise four timers and a waveform maker; One of them timer is a cycle timer, is unit circulation timing with described setting cycle, and each timing is exported the cycle arriving signal to other three timers and waveform maker respectively when arriving setting cycle; Described other three timers are respectively R, G, B and light 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 said waveform maker is put three tunnel control signals during arriving signal in the cycle that receives is respectively and is used to control the significant level that three kinds of color indicator lights of RGB are lighted; 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 said three tunnel control signals promptly 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 through regulating every kind of color indicator light in the 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.
Read the detailed description of embodiment of the present invention in conjunction with accompanying drawing after, 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
Do explanation in further detail below in conjunction with the accompanying drawing specific embodiments of the invention.
At first set forth the mentality of designing of present embodiment: present embodiment utilizes the indicator lamp 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 pulsewidth 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 promptly is used to control three road pwm signals of 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, promptly the zero hour in cycle of three road pwm signals is identical.Duty ratio to 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.Through regulating the value of Tr, Tg, Tb, can demonstrate various colors.
For example: when Tr=T, Tg=0, Tb=0, exhibit 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, show 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 yet and generate, 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 a 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 said timer 1, timer 2, timer 3 is respectively Tr, Tg, Tb (i.e. the indicator light of three kinds of colors lighting the duration in each setting cycle), connects described waveform maker respectively.When timer 0 each timing arrived setting cycle T, output cycle arriving signal S0 transferred to timer 1,2,3 and 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.Said waveform maker utilizes its three lead-out terminal outputs to be used to control three tunnel control signal PWM1, PWM2, the PWM3 of the light on and off of RGB tri-colour LED; And the level state of when receiving cycle arriving signal S0, putting three tunnel control signals is respectively and is used to control 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, waveform for example shown in Figure 2.
If three road pwm signals through the output of waveform maker have enough driving forces; Then can directly said 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; Said 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 through the output of waveform maker was high level, connected one road indicator light was lighted; When the pwm signal through 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 said 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 said four timers and waveform maker to carry out circuit design; Even with MCU with timing function; Utilize the reference clock of MCU to count; And then the mode through programming generate required setting cycle T and RGB tri-colour LED light duration T r, Tg, Tb, export required three road pwm signal PWM1, PWM2, PWM3 through three road I/O mouths of MCU.
Abundance for color shows is relevant with the minimum timing chronomere of the timer of the MCU of use.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) through 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 steady display of blend color.
Method and circuit application that the employing RGB tri-colour LED of present embodiment is shown random color 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 variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also should belong to protection scope of the present invention.

Claims (10)

1. a method of utilizing the RGB tri-colour LED to show random color is characterized in that: through the light that the duration blends different colours of lighting of three kinds of color indicator lights of RGB in the adjusting setting cycle; Said setting cycle persists the time smaller or equal to human eye vision.
2. method according to claim 1 is characterized in that: 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 through the duty of regulating three road pwm signals; The cycle of said three road pwm signals equals described setting cycle, and each zero hour in cycle of three road pwm signals is identical.
3. method according to claim 2 is characterized in that: described three road pwm signals cooperate a waveform maker to generate by four timers; One of them timer is a cycle timer, is unit circulation timing with described setting cycle, and each timing is exported the cycle arriving signal to other three timers and waveform maker respectively when arriving setting cycle; Described other three timers are respectively R, G, B and light 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 said waveform maker is put three tunnel control signals during arriving signal in the cycle that receives is respectively and is used to control the significant level that three kinds of color indicator lights of RGB are lighted; 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 said three tunnel control signals promptly form three road pwm signals.
4. method according to claim 3 is characterized in that: described four timers and waveform maker are integrated among the MCU; Described RGB tri-colour LED is RGB LED; Said three road pwm signals control respectively the light on and off of RGB tri-colour LED through the switch element break-make of control connection in RGB tri-colour LED current supply circuit.
5. according to each described method in the claim 1 to 4, it is characterized in that: said setting cycle is less than 100 milliseconds.
6. device that utilizes the RGB tri-colour LED to show random color; It is characterized in that: comprise the indicator light and the control circuit that is used to control said indicator light light on and off of three kinds of colors of RGB, said control circuit is through the light that the duration blends different colours of lighting of three kinds of color indicator lights of RGB in the adjusting setting cycle; Said setting cycle persists the time smaller or equal to human eye vision.
7. device according to claim 6; It is characterized in that: the pwm signal that said 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 through the duty of regulating three road pwm signals; The cycle of said three road pwm signals equals described setting cycle, and the zero hour in cycle of three road pwm signals is identical.
8. device according to claim 7 is characterized in that: in said control circuit, comprise four timers and a waveform maker; One of them timer is a cycle timer, is unit circulation timing with described setting cycle, and each timing is exported the cycle arriving signal to other three timers and waveform maker respectively when arriving setting cycle; Described other three timers are respectively R, G, B and light 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 said waveform maker is put three tunnel control signals during arriving signal in the cycle that receives is respectively and is used to control the significant level that three kinds of color indicator lights of RGB are lighted; 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 said three tunnel control signals promptly form three road pwm signals.
9. device according to claim 8 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.
10. according to each described device in the claim 6 to 9, it is characterized in that: said setting cycle is less than 100 milliseconds.
CN2011101504971A 2011-06-07 2011-06-07 Method and device for displaying any color by using RGB (Red, Green and Blue) three-color indicating lamps Active CN102307413B (en)

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CN105142265A (en) * 2015-07-28 2015-12-09 江苏达伦电子股份有限公司 LED timing control system
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
CN110582139A (en) * 2019-09-17 2019-12-17 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
CN110708787A (en) * 2019-09-20 2020-01-17 苏州浪潮智能科技有限公司 Control device and method of double-color lamp, storage medium and equipment
CN111246628A (en) * 2020-02-14 2020-06-05 苏州浪潮智能科技有限公司 Control method, device, equipment and storage medium for optical module indicator lamp

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CN103686257A (en) * 2013-12-04 2014-03-26 康佳集团股份有限公司 Set-top box signal strength indication method and step-top box

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CN101621880A (en) * 2009-04-16 2010-01-06 青岛海信电器股份有限公司 Three-color light source color point adjustment method and adjustment system
EP2160075A1 (en) * 2008-08-27 2010-03-03 Wan-Yu Hsieh Color temperature controller and color temperature control method of light emitting diode

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CN1888522A (en) * 2006-07-24 2007-01-03 北方工业大学 256 colourful lamp with random changeable colours
EP2160075A1 (en) * 2008-08-27 2010-03-03 Wan-Yu Hsieh Color temperature controller and color temperature control method of light emitting diode
CN101621880A (en) * 2009-04-16 2010-01-06 青岛海信电器股份有限公司 Three-color light source color point adjustment method and adjustment system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105142265A (en) * 2015-07-28 2015-12-09 江苏达伦电子股份有限公司 LED timing control system
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
CN110582139A (en) * 2019-09-17 2019-12-17 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
CN110708787A (en) * 2019-09-20 2020-01-17 苏州浪潮智能科技有限公司 Control device and method of double-color lamp, storage medium and equipment
CN111246628A (en) * 2020-02-14 2020-06-05 苏州浪潮智能科技有限公司 Control method, device, equipment and storage medium for optical module indicator lamp

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