CN101887675A - Multipurpose infrared device and display device using same - Google Patents
Multipurpose infrared device and display device using same Download PDFInfo
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- CN101887675A CN101887675A CN2009101393079A CN200910139307A CN101887675A CN 101887675 A CN101887675 A CN 101887675A CN 2009101393079 A CN2009101393079 A CN 2009101393079A CN 200910139307 A CN200910139307 A CN 200910139307A CN 101887675 A CN101887675 A CN 101887675A
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Abstract
The invention relates to a multipurpose infrared device and a display device using the same. The display device comprises a display panel and a multipurpose infrared device, wherein the multipurpose infrared device comprises an infrared light-emitting diode transmitter, an infrared receiver and a microcontroller. The infrared light-emitting diode transmitter is used for transmitting infrared rays. The infrared receiver is used for receiving the infrared rays. The microcontroller controls the infrared light-emitting diode transmitter and the infrared receiver in a way of time-division multiplexing so as to achieve the purposes of sensing the distance, remotely receiving the infrared rays and detecting ambient brightness.
Description
Technical field
The invention relates to the technology that a kind of light emitting diode is relevant, and particularly relevant for a kind of display device and inner multipurpose infrared device thereof that uses light emitting diode as transmission and receiver.
Background technology
Along with the progress of science and technology, all kinds of electronic products all develops towards multi-functional direction, so that electronic product can meet user's various demands.For instance, present digital frame must use a plurality of received signals and the module that transmits signal on its control interface, reaches the function of remote control reception, power saving and detecting distance simultaneously.Fig. 1 is the circuit block diagram of known digital frame.Please refer to Fig. 1, this digital frame comprises microcontroller 110, infrared remote control signal receiver 120, OPTICAL SENSORS 130, infrared transmitter 140 and infrared receiver 150.
With regard to regard to the remote control receiving function of digital frame, infrared remote control signal receiver 120 receives the 38kHz infra-red carrier signal that the employed external remote 160 of user sends.Microcontroller 110 is by differentiating the high low level of infra-red carrier signal, to decode the control signal that telepilot 160 is sent.And light source sensor 130 will detect the power of digital frame surrounding environment light, and microcontroller 110 is adjusted the backlight of digital frame, to reach the function of power saving according to the detecting result.And present light source sensor uses ON9668, KPS-3227SPIC and general photosensitive sensor, for example vulcanizes every (CdS) and light emitting diode (photo diode).In addition, infrared transmitter 140 emission infra-red carriers.And utilize infra-red carrier to run into the characteristic of object reflection, whether infrared receiver 150 detectings receive the infra-red carrier after the reflection.Microcontroller 110 will judge near the digital frame whether the object existence is arranged according to the detecting result of infrared receiver 150.In other words, during near digital frame, infrared receiver 150 will receive infra-red carrier as the people, and microcontroller 110 has been judged object and existed, and makes digital frame begin to play.On the contrary, do not have object to exist near microcontroller 110 is judged, digital frame will stop to play.
By above-mentioned known technology as can be known, reach multiple function in order to make digital frame, digital frame need use a plurality of parts (infrared remote control signal receiver, OPTICAL SENSORS, infrared transmitter and infrared receiver) respectively.Yet, consider, on the viewpoints such as the number of product parts and maintenance, when product uses too much part, will improve the cost of product with the cost of product, make that again product is difficult for producing in a large number and making.
Summary of the invention
In view of this, a purpose of the present invention is providing a kind of display device exactly, has multiple function and can reach the effect that reduces manufacturing cost again.
Another object of the present invention is providing a kind of multipurpose infrared device exactly, in order to combination distance detecting at least, telepilot receives and the surround lighting sensing, can save power consumption so that assemble the electronic product of this multipurpose infrared device, and reaches the purpose of far-end control.
For reaching above-mentioned or other purposes, the present invention proposes a kind of display device.This display device comprises a display panel, an infrared light-emitting diode forwarder, an infrared receiver and a microcontroller.The infrared light-emitting diode forwarder comprises first end and second end, in order to the emission infrared ray.Infrared receiver comprises first end, second end and the 3rd end, in order to receiving infrared-ray.Microcontroller comprises first pin, second pin, the 3rd pin and the 4th pin and the 5th pin, its first pin couples first end of infrared light-emitting diode forwarder, its second pin couples second end of infrared light-emitting diode forwarder, its the 3rd pin couples first end of infrared receiver, its the 4th pin couples second end of infrared receiver, and its 5th pin couples the 3rd end of infrared receiver.
In a remote signal reception period, microcontroller according to specific communications agreement, receives the infrared remote control signal that a telepilot is launched by its 3rd pin, the 4th pin and its 5th pin, with the control display panel.
During a distance detecting, microcontroller is by its first pin and its second pin, the strength of current that the infrared light-emitting diode forwarder is flow through is flow through in control, to export an infrared ray specification signal, and microcontroller is by its 3rd pin, the 4th pin and the 5th pin, the receiving infrared-ray specification signal, and, judge the distance of an external object and display device according to strength of current.
Between an ambient brightness detection period, the photocurrent of microcontroller detecting infrared light-emitting diode transmitter, to judge ambient brightness, wherein, microcontroller is controlled the backlight illumination of display panel according to ambient brightness.
According to the described display device of preferred embodiment of the present invention, above-mentioned infrared light-emitting diode forwarder comprises one first current-limiting resistance and first light emitting diode.First current-limiting resistance comprises first end and second end, and its first end couples first pin of microcontroller.First light emitting diode comprises first end and second end, and its first end couples second end of first current-limiting resistance, and its second end couples second pin of microcontroller.During above-mentioned distance detecting, the strength of current that microcontroller is exported by first pin is controlled the infrared ray designated signal strength that first light emitting diode is sent.
According to the described display device of preferred embodiment of the present invention, between above-mentioned ambient brightness detection period, microcontroller is granted first light emitting diode, one reverse bias by first pin and described second pin, and detects the photocurrent of first light emitting diode, to judge ambient brightness.
According to the described display device of preferred embodiment of the present invention, first end of above-mentioned first light emitting diode is an anode, and second end of first light emitting diode is a negative electrode.
According to the described display device of preferred embodiment of the present invention, above-mentioned microcontroller more comprises the 6th pin, and above-mentioned infrared light-emitting diode forwarder comprises a transistor, second current-limiting resistance and second light emitting diode.Transistor comprises that base stage, first penetrates/collect the utmost point and second and penetrate/collect the utmost point.Transistorized base stage couples first pin of microcontroller, and it first is penetrated/collect the utmost point and be coupled to a reference voltage source, and it second penetrates/collect the 6th pin that the utmost point couples microcontroller.Second current-limiting resistance comprises first end and second end, and its first end couples transistorized second and penetrates/collect the utmost point.Second light emitting diode comprises first end and second end, and its first end couples second end of second current-limiting resistance, and its second end couples second pin of microcontroller.
According to the described display device of preferred embodiment of the present invention, during above-mentioned distance detecting, first pin of microcontroller and second pin are logic low potential, the 6th pin of microcontroller is a high impedance status, the strength of current that microcontroller is exported by first pin is controlled the infrared ray designated signal strength that second light emitting diode is sent.
According to the described display device of preferred embodiment of the present invention, between above-mentioned ambient brightness detection period, first pin of microcontroller and second pin are logic high potential, the 6th pin of microcontroller is a logic low potential, microcontroller is granted second light emitting diode, one reverse bias by second pin and described the 6th pin, and detect the photocurrent of second light emitting diode, to judge ambient brightness.
According to the described display device of preferred embodiment of the present invention, first end of above-mentioned second light emitting diode is an anode, and second end of second light emitting diode is a negative electrode.
According to the described display device of preferred embodiment of the present invention, during above-mentioned remote signal reception period is detected greater than above-mentioned distance and between above-mentioned ambient brightness detection period.
The present invention proposes a kind of multipurpose infrared device in addition, is applicable to a display device.This multipurpose infrared device comprises an infrared light-emitting diode forwarder, an infrared receiver and a microcontroller.The infrared light-emitting diode forwarder comprises first end and second end, and it is in order to the emission infrared ray.Infrared receiver comprises first end, second end and the 3rd end, and it is in order to receiving infrared-ray.One microcontroller comprises first pin, second pin, the 3rd pin, the 4th pin and the 5th pin, its first pin couples first end of described infrared light-emitting diode forwarder, its second pin couples second end of described infrared light-emitting diode forwarder, its the 3rd pin couples first end of described infrared receiver, its the 4th pin couples second end of described infrared receiver, and its 5th pin couples the 3rd end of described infrared receiver.
In a remote signal reception period, microcontroller according to specific communications agreement, receives the infrared remote control signal that a telepilot is launched by its 3rd pin, the 4th pin and its 5th pin, with the control display device.
During a distance detecting, microcontroller is by its first pin and its second pin, the strength of current that the infrared light-emitting diode forwarder is flow through is flow through in control, to export an infrared ray specification signal, and microcontroller is by its 3rd pin, the 4th pin and its 5th pin, the receiving infrared-ray specification signal, and, judge the distance of an external object and display device according to strength of current.
Between an ambient brightness detection period, the photocurrent of microcontroller detecting infrared receiver, to judge ambient brightness, wherein microcontroller is controlled the backlight illumination of display device according to ambient brightness.
According to the described multipurpose infrared device of preferred embodiment of the present invention, above-mentioned infrared light-emitting diode forwarder comprises one first current-limiting resistance and one first light emitting diode.First current-limiting resistance comprises first end and second end, and its first end couples first pin of microcontroller.First light emitting diode comprises first end and second end, and its first end couples second end of first current-limiting resistance, and its second end couples second pin of microcontroller.During above-mentioned distance detecting, the described strength of current that microcontroller is exported by first pin is controlled the infrared ray designated signal strength that first light emitting diode is sent.
According to the described multipurpose infrared device of preferred embodiment of the present invention, first end of above-mentioned first light emitting diode is an anode, and second end of first light emitting diode is a negative electrode.
According to the described multipurpose infrared device of preferred embodiment of the present invention, above-mentioned microcontroller more comprises the 6th pin, and above-mentioned infrared light-emitting diode forwarder comprises a transistor, one second current-limiting resistance and one second light emitting diode.Transistor comprises that base stage, first penetrates/collect the utmost point and second and penetrate/collect the utmost point.Transistorized base stage couples first pin of microcontroller, and it first is penetrated/collect the utmost point and be coupled to a reference voltage source, and it second penetrates/collect the 6th pin that the utmost point couples microcontroller.Second current-limiting resistance comprises first end and second end, and its first end couples transistorized second and penetrates/collect.Second light emitting diode comprises first end and second end, and its first end couples second end of second current-limiting resistance, and its second end couples second pin of microcontroller.
According to the described multipurpose infrared device of preferred embodiment of the present invention, during above-mentioned distance detecting, first pin of microcontroller and second pin are logic low potential, and the 6th pin of microcontroller is a high impedance status.The strength of current that microcontroller is exported by first pin is controlled the infrared ray designated signal strength that second light emitting diode is sent.
According to the described multipurpose infrared device of preferred embodiment of the present invention, first end of above-mentioned second light emitting diode is an anode, and second end of second light emitting diode is a negative electrode.
According to the described display device of preferred embodiment of the present invention, during above-mentioned remote signal reception period is detected greater than above-mentioned distance and between above-mentioned ambient brightness detection period.
Spirit of the present invention is to be that microcontroller utilizes the mode of time division multiplexing, and control infrared light-emitting diode forwarder and infrared receiver make display device can reach the function that detecting distance, infra-red remote control reception and ambient brightness detect.Simultaneously, with regard to the angle of product manufacturing,, the quantity of the part of display device is reduced, to reach the effect that reduces manufacturing cost because microcontroller only utilizes infrared light-emitting diode forwarder and infrared receiver.
Description of drawings
Fig. 1 is the circuit block diagram of known digital frame.
Fig. 2 is the installation drawing of the display device that illustrates according to the embodiment of the invention.
Fig. 3 is the distribution plan according to the time section of the embodiment of the invention.
Fig. 4 is the circuit block diagram of the multipurpose infrared device that illustrates according to another embodiment of the present invention.
Fig. 5 is the circuit diagram of infrared light-emitting diode forwarder 430 according to another embodiment of the present invention.
Fig. 6 is the circuit block diagram of the multipurpose infrared device that illustrates according to another embodiment of the present invention.
Fig. 7 is the circuit block diagram of the multipurpose infrared device that illustrates according to another embodiment of the present invention.
Drawing reference numeral:
110: microcontroller
120: the infrared remote control signal receiver
130: OPTICAL SENSORS
140: infrared transmitter
150: infrared receiver
160,250: telepilot
200: display device
210: display panel
220,420,620,720: microcontroller
230,430,630,730: the infrared light-emitting diode forwarder
240,440,640,740: infrared receiver
400,600,700: multipurpose infrared device
P1: remote signal reception period
P2: during the distance detecting
P3: between the ambient brightness detection period
T1～T6: pin
R1, R2: current-limiting resistance
D1, D2 light emitting diode
I1, I2: electric current
Q1: transistor
VDD: reference voltage source
CU: control module
Embodiment
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below.
Fig. 2 is the installation drawing of the display device that illustrates according to the embodiment of the invention.Please refer to Fig. 2, display device 200 comprises display panel 210, microcontroller 220, infrared light-emitting diode forwarder 230 and infrared receiver 240.For embodiments of the invention more clearly are described, in this figure, additionally illustrated a telepilot 250.In this embodiment, suppose that display device is a digital frame.In general, digital frame can possess following 3 kinds of functions are arranged:
1. telepilot receiving function.Allow the user control shown photograph or other multimedia broadcasts by telepilot.
2. ambient brightness detects and corresponding backlight control function.In order to obtain the balance of display effect and energy saving, this function is indispensable.
3. detect the function of the distance of extraneous user and digital frame.Same reason when the user does not does not view and admire near digital frame, after a period of time, just can make digital frame enter park mode, to reach the effect of energy saving.
Below, just, respectively embodiments of the invention are described based on above-mentioned three functions.
In remote signal reception period P1, microcontroller 220 enters the remote control signal receiving formula, and makes infrared receiver 240 enter the remote control signal receiving formula.At this moment, infrared receiver 240 receives an infrared remote control signal of being launched from the telepilot 250 of far-end.And the infrared remote control signal that microcontroller 220 decodings are received, and according to decoded infrared remote control signal, control display panel 210.
Then, in distance detecting period P 2, microcontroller 220 will enter apart from sense mode, and infrared light-emitting diode forwarder 230 and infrared receiver 240 are also entered apart from sense mode.At this moment, the strength of current that infrared light-emitting diode forwarder 230 is flow through is flow through in microcontroller 220 controls, make infrared light-emitting diode forwarder 230 send an infrared ray specification signal, and then the intensity of control infrared ray specification signal and the distance of emission.And, in distance detecting period P 2, because the speed that infrared signal transmits is quite fast, therefore external object (when for example the someone walks close to display device 200) is arranged near display device 200, above-mentioned infrared ray specification signal will be by external object reflected back display device 200.
During infrared ray specification signal after infrared ray receiver 240 receives reflection, the distance of the close display device 200 of expression external object institute is in the scope of infrared ray specification signal.And microcontroller 220 will be judged the distance of external object and display device 200 according to strength of current this moment.When microcontroller 220 all can't make infrared receiver 240 receive the infrared ray specification signal under different strength of current, that judging/displaying device 200 is neighbouring without any external object.And after after a while (for example 5～10 minutes after), when still continuing to determine near the display device 200 without any external object, microcontroller 220 will cut out display device 200 or make display device 200 enter dormant state, to reach the effect of energy saving.
P3 between the ambient brightness detection period, microcontroller 220 will enter the ambient brightness detecting pattern, and make infrared light-emitting diode forwarder 230 also enter the ambient brightness detecting pattern.At this moment, the photocurrent of microcontroller 220 detecting infrared light-emitting diode forwarders 230 is to judge ambient brightness.And after determining ambient brightness, microcontroller 220 can be adjusted the backlight intensity of display panel 210 according to ambient brightness, to reach less electricity consumption.
In above-mentioned example, be that time span with P1 is much larger than P2 and P3 for the configuration of period P 1, P2 and P3.Owing to consider user's custom, for the comparatively sensitive reaction of the action need of telepilot 250, the remote signal that display device 200 needs rapid reaction telepilot 250 to be sent, therefore, above-mentioned microcontroller 220 needs long remote signal reception period P1.And ambient brightness and people's displacement comparatively speaking can't be along with the time acute variation.
In addition, detecting ambient brightness and detecting people displacement are that therefore, this kind design is to have weighed the preferred configuration that various factors is adopted down for the considering of power saving.Yet length and the order of P3 can be planned according to the design of product function between above-mentioned remote signal reception period P1, distance detecting period P 2 and ambient brightness detection period, and the present invention does not limit the distribution of above-mentioned time section.In addition, in the above-described embodiments, infrared light-emitting diode forwarder 250 is between the ambient brightness detection period in the P3, in order to carry out the detection of ambient brightness.
In order to make persons skilled in the art implement the present invention, below a multipurpose infrared device that is applicable in the display device is proposed in addition by present embodiment.Fig. 4 is the circuit block diagram of the multipurpose infrared device that illustrates according to another embodiment of the present invention.Please refer to Fig. 4, multipurpose infrared device 400 comprises microcontroller 420, infrared light-emitting diode forwarder 430 and infrared receiver 440.Microcontroller 420 has the first pin T1, the second pin T2, the 3rd pin T3, the 4th pin T4 and the 5th pin T5.Infrared light-emitting diode forwarder 430 has first end and second end, couples the first pin T1 and the second pin T2 of microcontroller 420 respectively.Infrared receiver 440 has first end, second end and the 3rd end, couples the 3rd pin T3, the 4th pin T4 and the 5th pin T5 of microcontroller 420 respectively.
Fig. 5 is the circuit diagram of infrared light-emitting diode forwarder 430 according to another embodiment of the present invention.Please refer to Fig. 5, infrared light-emitting diode forwarder 430 comprises the first current-limiting resistance R1 and the first light emitting diode D1, and it couples relation as shown in Figure 5.In the present embodiment, microcontroller 420 is for example in the mode of time division multiplexing, at different time section control infrared light-emitting diode forwarder 430 and infrared receivers 440, make display device have the function that detecting distance, infra-red remote control reception and ambient brightness detect concurrently.The distribution of above-mentioned time section for example is shown in Figure 3.
Please also refer to Fig. 3～Fig. 5, in distance detecting period P 2, microcontroller 420 will enter apart from sense mode, export an electric current I 1 by the first pin T1.And microcontroller 420 determines the intensity of the infrared ray specification signal that the first light emitting diode D1 is sent by the intensity of the electric current I 1 controlling the first pin T1 and exported.And, in distance detecting period P 2, because the speed that infrared signal transmits is quite fast, therefore during the infrared ray specification signal when infrared ray receiver 440 receives reflection after, expression has the distance of the close display device of external object in the scope of infrared ray specification signal.Microcontroller 420 will be judged the distance of external object and display device according to the intensity of electric current I 1 this moment.
In the P3, microcontroller 420 will enter the ambient brightness detecting pattern between the ambient brightness detection period, grant the first light emitting diode D1, one reverse bias by the first pin T1 and the second pin T2.At this moment, because the element characteristic of light emitting diode, the first light emitting diode D1 that is under the contrary state partially will produce a photocurrent according to the ambient light that is sensed.Therefore, microcontroller 420 is judged ambient brightness by the photocurrent that the first pin T1 and the second pin T2 detect the first light emitting diode D1.
In remote signal reception period P1, microcontroller 420 will enter the remote control signal receiving formula, and control infrared receiver 440 receives the infrared remote control signal of being launched from the telepilot (not illustrating) of far-end.With present infrared remote control technology, the infrared remote control signal that telepilot is launched is the carrier signal of 38KHz.And microcontroller 420 is reached an agreement on according to a specific communications, the infrared remote control signal that decoding is received, and according to decoded infrared remote control signal, the control display device.At this,, be not the emphasis of present embodiment, so give unnecessary details no longer in detail at this because the technology of decoding infrared remote control signal is employed already widely.
In order to make persons skilled in the art implement the present invention, below a multipurpose infrared device that is applicable in the display device is proposed in addition by present embodiment.Fig. 6 is the circuit block diagram of the multipurpose infrared device that illustrates according to another embodiment of the present invention.Please refer to Fig. 6, multipurpose infrared device 600 comprises microcontroller 620, infrared light-emitting diode forwarder 630 and infrared receiver 640.Microcontroller 620 has the first pin T1, the second pin T2, the 3rd pin T3, the 4th pin T4, the 5th pin T5 and the 6th pin T6, and it couples relation as shown in Figure 6.Infrared light-emitting diode forwarder 630 comprises transistor Q1, the second current-limiting resistance R2 and the second light emitting diode D2.The base stage of transistor Q1 couples the first pin T1 of microcontroller, and first penetrates/collect the utmost point is coupled to a reference voltage source VDD, and second penetrates/collect the 6th pin T6 that the utmost point couples microcontroller 620.First end of the second current-limiting resistance R2 couples the 6th pin T6 that second of transistor Q1 penetrated/collected the utmost point and microcontroller 620.First end of the second light emitting diode D2 couples second end of the second current-limiting resistance R2, and its second end couples the second pin T2 of microcontroller 620.
In the present embodiment, microcontroller 620 is for example in the mode of time division multiplexing, at different time section control infrared light-emitting diode forwarder 630 and infrared receivers 640, make display device have the function that detecting distance, infra-red remote control reception and ambient brightness detect concurrently.The distribution of above-mentioned time section for example is shown in Figure 3.
Please also refer to the 3rd and Fig. 6, in distance detecting period P 2, microcontroller 620 will enter apart from sense mode.At this moment, the first pin T1 and the second pin T2 of microcontroller 620 are logic low potential, and its 6th pin T6 is a high impedance status, and making transistor Q1 is conducting state.Microcontroller 620 goes out an electric current I 2 by the first pin T1.And microcontroller 620 determines the intensity of the infrared ray specification signal that the second light emitting diode D2 is sent by the intensity of the electric current I 2 controlling the first pin T1 and exported.And, in distance detecting period P 2, because the speed that infrared signal transmits is quite fast, therefore during the infrared ray specification signal when infrared ray receiver 640 receives reflection after, expression has the distance of the close display device of external object in the scope of infrared ray specification signal.Microcontroller 620 will be judged the distance of external object and display device according to the intensity of electric current I 2 this moment.
By aforesaid operations as can be known, microcontroller 620 comes the electric current of penetrating/collect the utmost point of oxide-semiconductor control transistors Q1 by the base current of transistor Q1, and the electric current that drives the second light emitting diode D2 will be the several times of script electric current I 2.Therefore, microcontroller 620 can measure the object distance whether external object far away exists and be separated out more stratum.
In the P3, microcontroller 620 will enter the ambient brightness detecting pattern between the ambient brightness detection period.At this moment, the first pin T1 and the second pin T2 of microcontroller 620 are logic high potential, and its 6th pin T6 is a logic low potential, and making transistor Q1 is cut-off state.Microcontroller 620 is granted the second light emitting diode D2, one reverse bias by the second pin T2 and the 6th pin T6.Because the element characteristic of light emitting diode, the second light emitting diode D2 that is under the contrary state partially will produce a photocurrent according to the ambient light that is sensed.Therefore, microcontroller 620 is judged ambient brightness by the photocurrent that the second pin T2 and the 6th pin T6 detect the second light emitting diode D2.In addition, in remote signal reception period P1, because microcontroller 620 is identical with the operation of infrared receiver 440 with the operation and the microcontroller in the foregoing description 420 of infrared receiver 640, therefore, present embodiment is given unnecessary details no longer in detail.
In the above-described embodiments, with the viewpoint of integrated circuit (IC) design, above-mentioned transistor Q1 can design within microcontroller, as shown in Figure 7.Fig. 7 is the circuit block diagram of the multipurpose infrared device that illustrates according to another embodiment of the present invention.Please refer to Fig. 7, multipurpose infrared device 700 comprises microcontroller 720, infrared light-emitting diode forwarder 730 and infrared receiver 740.Wherein microcontroller 720 comprises a control module CU and transistor Q1.Because the operation of the display device of Fig. 7 and Fig. 6 are identical, so same section is given unnecessary details no longer in detail.Its difference is that transistor Q1 designs within microcontroller 720.And, by the electric current and the accurate position of logic of the base stage of control module CU oxide-semiconductor control transistors Q1.Among above-mentioned Fig. 7 embodiment, the practice that transistor Q1 is designed in microcontroller 720 can effectively reduce the quantity of chip pin and chip exterior element, and reduces the circuit manufacturing cost.
In addition, though above-mentioned transistor Q1 is with two-carrier junction transistor (Bipolar JunctionTransistor, BJT) give an example, yet, affiliated technical field those skilled in the art should be known in that transistor Q1 can also use mos field effect transistor (Metal Oxide SemiconductorField Effect Transistor) to implement.Be to use P type or N type as for transistor Q1, difference only is the difference of control mode.So the present invention is not as limit.
In sum, spirit of the present invention is to be that microcontroller utilizes the mode of time division multiplexing, control infrared light-emitting diode forwarder and infrared receiver make display device can reach the function that detecting distance, infra-red remote control reception and ambient brightness detect.Simultaneously, with regard to the angle of product manufacturing,, the quantity of the part of display device is reduced, to reach the effect that reduces manufacturing cost because microcontroller only utilizes infrared light-emitting diode forwarder and infrared receiver.
The specific embodiment that is proposed in the detailed description of preferred embodiment is only in order to convenient explanation technology contents of the present invention, but not with narrow sense of the present invention be limited to the foregoing description, in the situation that does not exceed spirit of the present invention and claim scope, the many variations of being done is implemented, and all belongs to scope of the present invention.Therefore protection scope of the present invention defines and is as the criterion when looking the claim scope.
Claims (16)
1. a display device is characterized in that, described device comprises:
One display panel;
One infrared light-emitting diode forwarder comprises first end and second end, in order to the emission infrared ray;
One infrared receiver comprises first end, second end and the 3rd end, in order to receiving infrared-ray;
One microcontroller, comprise first pin, second pin, the 3rd pin, the 4th pin and the 5th pin, its first pin couples first end of described infrared light-emitting diode forwarder, its second pin couples second end of described infrared light-emitting diode forwarder, its the 3rd pin couples first end of described infrared receiver, its the 4th pin couples second end of described infrared receiver, and its 5th pin couples the 3rd end of described infrared receiver, wherein:
In a remote signal reception period, described microcontroller according to specific communications agreement, receives the infrared remote control signal that a telepilot is launched, to control described display panel by described the 3rd pin, described the 4th pin and described the 5th pin;
During a distance detecting, described microcontroller is by described first pin and described second pin, the strength of current that described infrared light-emitting diode forwarder is flow through is flow through in control, to export an infrared ray specification signal, and described microcontroller is by described the 3rd pin, described the 4th pin and described the 5th pin, receive described infrared ray specification signal, and, judge the distance of an external object and described display device according to described strength of current;
Between an ambient brightness detection period, described microcontroller is detected the photocurrent of described infrared light-emitting diode forwarder, and to judge an ambient brightness, wherein, described microcontroller is controlled the backlight illumination of described display panel according to described ambient brightness.
2. display device as claimed in claim 1 is characterized in that, described infrared light-emitting diode forwarder comprises:
One first current-limiting resistance comprises first end and second end, and its first end couples first pin of described microcontroller;
One first light emitting diode comprises first end and second end, and its first end couples second end of described first current-limiting resistance, and its second end couples second pin of described microcontroller,
Wherein during described distance detecting, the described strength of current that described microcontroller is exported by described first pin is controlled the described infrared ray designated signal strength that described first light emitting diode is sent.
3. display device as claimed in claim 2, it is characterized in that, between described ambient brightness detection period, described microcontroller is granted described first light emitting diode, one reverse bias by described first pin and described second pin, and detect the photocurrent of described first light emitting diode, to judge ambient brightness.
4. display device as claimed in claim 2 is characterized in that, first end of described first light emitting diode is an anode, and second end of described first light emitting diode is a negative electrode.
5. display device as claimed in claim 1 is characterized in that described microcontroller more comprises the 6th pin, and described infrared light-emitting diode forwarder comprises:
One transistor comprises that base stage, first penetrates/collect the utmost point and second and penetrate/collect the utmost point, and its base stage couples first pin of described microcontroller, and it first is penetrated/collect the utmost point and be coupled to a reference voltage source, and it second penetrates/collect the 6th pin that the utmost point couples described microcontroller;
One second current-limiting resistance comprises first end and second end, and its first end couples described transistorized second and penetrates/collect the utmost point;
One second light emitting diode comprises first end and second end, and its first end couples second end of described second current-limiting resistance, and its second end couples second pin of described microcontroller.
6. display device as claimed in claim 5, it is characterized in that, during described distance detecting, first pin of described microcontroller and second pin are logic low potential, the 6th pin of described microcontroller is a high impedance status, the described strength of current that described microcontroller is exported by described first pin is controlled the described infrared ray designated signal strength that described second light emitting diode is sent.
7. display device as claimed in claim 5, it is characterized in that, between described ambient brightness detection period, first pin of described microcontroller and second pin are logic high potential, the 6th pin of described microcontroller is a logic low potential, described microcontroller is granted described second light emitting diode, one reverse bias by described second pin and described the 6th pin, and detects the photocurrent of described second light emitting diode, to judge ambient brightness.
8. display device as claimed in claim 5 is characterized in that, first end of described second light emitting diode is an anode, and second end of described second light emitting diode is a negative electrode.
9. during display device as claimed in claim 1, wherein said remote signal reception period are detected greater than described distance and between described ambient brightness detection period.
10. a multipurpose infrared device is characterized in that, is applicable to a display device, and described infrared facility comprises:
One infrared light-emitting diode forwarder comprises first end and second end, in order to the emission infrared ray;
One infrared receiver comprises first end, second end and the 3rd end, in order to receiving infrared-ray;
One microcontroller, comprise first pin, second pin, the 3rd pin, the 4th pin and the 5th pin, its first pin couples first end of described infrared light-emitting diode forwarder, its second pin couples second end of described infrared light-emitting diode forwarder, its the 3rd pin couples first end of described infrared receiver, its the 4th pin couples second end of described infrared receiver, and its 5th pin couples the 3rd end of described infrared receiver, wherein:
In a remote signal reception period, described microcontroller according to specific communications agreement, receives the infrared remote control signal that a telepilot is launched, to control described display device by described the 3rd pin, described the 4th pin and described the 5th pin;
During a distance detecting, described microcontroller is by described first pin and described second pin, the strength of current that described infrared light-emitting diode forwarder is flow through is flow through in control, to export an infrared ray specification signal, and described microcontroller is by described the 3rd pin, described the 4th pin and described the 5th pin, receive described infrared ray specification signal, and, judge the distance of an external object and described display device according to described strength of current;
Between an ambient brightness detection period, described microcontroller is detected the photocurrent of described infrared light-emitting diode forwarder, and to judge an ambient brightness, wherein said microcontroller is controlled the backlight illumination of described display device according to described ambient brightness.
11. multipurpose infrared device as claimed in claim 10 is characterized in that, described infrared light-emitting diode forwarder comprises:
One first current-limiting resistance comprises first end and second end, and its first end couples first pin of described microcontroller;
One first light emitting diode comprises first end and second end, and its first end couples second end of described first current-limiting resistance, and its second end couples second pin of described microcontroller,
Wherein during described distance detecting, the described strength of current that described microcontroller is exported by described first pin is controlled the described infrared ray designated signal strength that described first light emitting diode is sent.
12. multipurpose infrared device as claimed in claim 11 is characterized in that, first end of described first light emitting diode is an anode, and second end of described first light emitting diode is a negative electrode.
13. multipurpose infrared device as claimed in claim 10 is characterized in that described microcontroller more comprises the 6th pin, described infrared light-emitting diode forwarder comprises:
One transistor comprises that base stage, first penetrates/collect the utmost point and second and penetrate/collect the utmost point, and its base stage couples first pin of described microcontroller, and it first is penetrated/collect the utmost point and be coupled to a reference voltage source, and it second penetrates/collect the 6th pin that the utmost point couples described microcontroller;
One second current-limiting resistance comprises first end and second end, and its first end couples described transistorized second and penetrates/collect;
One second light emitting diode comprises first end and second end, and its first end couples second end of described second current-limiting resistance, and its second end couples second pin of described microcontroller.
14. multipurpose infrared device as claimed in claim 13, it is characterized in that, during described distance detecting, first pin of described microcontroller and second pin are logic low potential, the 6th pin of described microcontroller is a high impedance status, the described strength of current that described microcontroller is exported by described first pin is controlled the described infrared ray designated signal strength that described second light emitting diode is sent.
15. multipurpose infrared device as claimed in claim 13 is characterized in that, first end of described second light emitting diode is an anode, and second end of described second light emitting diode is a negative electrode.
16. multipurpose infrared device as claimed in claim 10 is characterized in that, during described remote signal reception period is detected greater than described distance and between described ambient brightness detection period.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101393079A CN101887675B (en) | 2009-05-11 | 2009-05-11 | Multipurpose infrared device and display device using same |
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| CN2009101393079A CN101887675B (en) | 2009-05-11 | 2009-05-11 | Multipurpose infrared device and display device using same |
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| CN101887675B CN101887675B (en) | 2011-12-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761475A (en) * | 2016-02-29 | 2016-07-13 | 广东欧珀移动通信有限公司 | Control method, control device and electronic device |
| CN105785379A (en) * | 2016-03-07 | 2016-07-20 | 上海摩软通讯技术有限公司 | Infrared sensor and handheld equipment |
| CN106297628A (en) * | 2016-08-15 | 2017-01-04 | 青岛海信电器股份有限公司 | Brightness of display screen control method and device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050047794A1 (en) * | 2003-08-29 | 2005-03-03 | Quintanar Felix Clarence | Infrared remote control receiver and system |
| CN1829301A (en) * | 2005-02-28 | 2006-09-06 | 华硕电脑股份有限公司 | Display system and method capable of automatically adjusting display brightness |
| CN2922372Y (en) * | 2006-06-19 | 2007-07-11 | 郭赐福 | Multi-functional sensor |
| CN201127456Y (en) * | 2007-11-23 | 2008-10-08 | 香港瑞普科技有限公司 | Digital player with infrared inductor |
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2009
- 2009-05-11 CN CN2009101393079A patent/CN101887675B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761475A (en) * | 2016-02-29 | 2016-07-13 | 广东欧珀移动通信有限公司 | Control method, control device and electronic device |
| CN105785379A (en) * | 2016-03-07 | 2016-07-20 | 上海摩软通讯技术有限公司 | Infrared sensor and handheld equipment |
| CN106297628A (en) * | 2016-08-15 | 2017-01-04 | 青岛海信电器股份有限公司 | Brightness of display screen control method and device |
| CN106297628B (en) * | 2016-08-15 | 2020-03-20 | 青岛海信电器股份有限公司 | Display screen brightness adjusting method and device |
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| CN101887675B (en) | 2011-12-14 |
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