CN203327298U - Automobile combination instrument backlight circuit based on digital coding - Google Patents
Automobile combination instrument backlight circuit based on digital coding Download PDFInfo
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- CN203327298U CN203327298U CN2013202852435U CN201320285243U CN203327298U CN 203327298 U CN203327298 U CN 203327298U CN 2013202852435 U CN2013202852435 U CN 2013202852435U CN 201320285243 U CN201320285243 U CN 201320285243U CN 203327298 U CN203327298 U CN 203327298U
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- China
- Prior art keywords
- combination instrument
- background light
- triode
- automobile combination
- main control
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses an automobile combination instrument backlight circuit based on digital coding, comprising a background light source, a main control module and a photosensitive sensor and also comprising a triode and a switch unit. The collector electrode of the triode is in connection with the background light source; the switch unit comprises at least two switch branches respectively parallelly connected to an emitter electrode and a base electrode of the triode; the switch branches comprise bidirectional simulation switches and bias resistors which are in series connection with each other, wherein a control terminal of each bidirectional simulation switch is respectively correspondingly in connection with a plurality of signal output terminals of the main control module; the main control module outputs digital coding used for controlling open and close states of each bidirectional simulation switch in dependence on light intensity signals collected by the photosensitive sensor so as to adjust the magnitude of triode offset voltage. The automobile combination instrument backlight circuit can automatically change brightness of a backlight source of a combination instrument in real time in dependence on external light intensity detected by the photosensitive sensor in order that a driver can clearly read data from the combination instrument with any light ray.
Description
Technical field
The utility model relates to the automatic control technology field, relates in particular to a kind of based on digitally coded automobile combination instrument background light circuit.
Background technology
Current home and overseas, the bias light of medium-to-high grade automobile combination meter shows that the adjusting of apparent value is mainly to change by the manual adjustments mode brightness that instrument face plate is respectively indicated the apparent value unit, reach under the different weather situation, comfortable bright visual effect, such as when running car during at the backlight state, the cause of head-on irradiating due to sunlight, too bright at the automobile instrument panel surround lighting, the instrument display light is too dark, the apparent value that instrument shows is often fuzzy or do not see, at this moment the driver need stop car or be parked in safer place, strengthen background luminance with the push-button switch on hand adjustment joint instrument, improve display effect, sometimes Primary regulation does not reach satisfied effect, need adjusting several times, if the driver is driving to travel middle adjusting backlight button, also can increase potential safety hazard, due to daytime or under backlight, done change and regulated, at this moment when automobile when travelling night, feel that again the bias light on instrument is too dazzling, and impact is normally travelled, also can disperse driver's attentiveness when serious, at this moment need again car is parked in to place of safety, carry out manual adjustments, sometimes need just can reach satisfied result through above adjusting several times, operation is very inconvenient, sometimes in order to save trouble usually by the moderate position of instrument brightness regulation, and avoid the puzzlement of regulating, will feel to travel under evening and strong daylight, the instrument visual poor effect.
The utility model content
The purpose of this utility model is to overcome deficiency of the prior art, and provide a kind of and made in any environment based on digitally coded automobile combination instrument background light circuit, the automobile combination meter clear reading, and there is comfortable visual effect.
For achieving the above object, described based on digitally coded automobile combination instrument background light circuit, it comprises background light source, main control module and light sensor, is characterized in, described circuit also comprises triode and switch element, wherein,
The collector electrode of described triode connects described background light source;
Described switch element comprises the emitter that is connected in parallel on respectively described triode and at least two switching branches at base stage two ends; Described switching branches comprises bidirectional analog switch and the biasing resistor be one another in series, and the control end of the bidirectional analog switch of each switching branches connects respectively a plurality of signal output parts of main control module correspondingly; Described main control module according to the light intensity signal of light sensor collection to each control end output the digital coding for the folding condition of the bidirectional analog switch of controlling each switching branches, with the size of the bias voltage of adjusting described triode.
Preferably, described digital coding is 8421 yards.
Preferably, the biasing resistor of described each switching branches is differing from each other.
Preferably, described switch element comprises the emitter that is connected in parallel on respectively described triode and four switching branches at base stage two ends, and the control end of the bidirectional analog switch of described four switching branches connects respectively four signal output parts of main control module correspondingly.
Preferably, described light sensor is arranged on the car windscreen top.
Preferably, described main control module is single-chip microcomputer.
Preferably, described light sensor is one or more in photoelectric tube, photomultiplier, photo resistance, phototriode.
Preferably, described background light source is light-emitting diode.
The beneficial effects of the utility model are, the extraneous light intensity that can automatically detect according to light sensor based on digitally coded automobile combination instrument background light circuit described in the utility model changes the brightness of the background light source of combination instrument in real time, no matter make under which kind of light condition, the driver all can clearly read the reading of combination instrument.
The accompanying drawing explanation
Fig. 1 shows the circuit diagram based on digitally coded automobile combination instrument background light circuit described in the utility model.
Embodiment
Below describe embodiment of the present utility model in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Fig. 1 shows the circuit diagram based on digitally coded automobile combination instrument background light circuit described in the utility model, as shown in Figure 1, the background light source of automobile combination meter comprises that LED 1 is to LED18, wherein, the positive pole of LED 1, LED3, LED5, LED7, LED9, LED11, LED13, LED15, LED17 is connected with positive pole of stabilized voltage supply, and negative pole is connected with the positive pole of LED 2, LED4, LED6, LED8, LED10, LED12, LED14, LED16, LED18 respectively; The negative pole of LED 2, LED4, LED6, LED8, LED10, LED12, LED14, LED16, LED18 is connected with resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9 respectively; Resistance R 1, R2, R3, R4, R5, R6, R7, R8, the R9 other end and the collector electrode of triode Q1 are connected; The base stage of resistance R 10 1 termination triode Q1, other end connection+5V power supply, be the fixedly upper offset resistance of triode Q1.
U1A, U1B, U1C, four bidirectional analog switches that U1D is the four bidirectional analog switch integrated circuit U1 that to be integrated in a model be CD4066, a resistance of each analog switch serial connection, respectively R11, R12, R13, R14, the 5th of four bidirectional analog switch integrated circuit U1, 6, 12, the signal controlling end K1 that 13 pin positions are four bidirectional analog switches, K2, K3, K4, each signal controlling end K1, K2, K3, K4 connects respectively the 78th of single-chip microcomputer U2, 79, 80, 81 pin positions, form by 8421 codings the output current that 16 component piezoresistance signals promote triode Q1, the emitter of triode Q1 and stabilized voltage power supply " " end is connected.
The collector electrode of resistance R 16 1 ends and light sensor is connected, and the other end is connected with+5V voltage; The collector electrode of resistance R 15 1 ends and light sensor is connected, and the other end connects the 100th pin of single-chip microcomputer U2, AD modulus signal input collection terminal; The emitter of light sensor and stabilized voltage power supply " " end is connected.
The important devices that in instrument, light sensor is the outer external light source brightness of inspection vehicle, usually be arranged on the car windscreen top, receive the extraneous light of the positive front upper place of automobile, when the car that travels in face of the solar time, light sensor can will detect stronger analog optical signal, after resistance R 16 dividing potential drops, the 100th pin AD port to single-chip microcomputer U2 is carried a voltage signal, at this moment single-chip microcomputer U2 inside is digital signal by the voltage signal of simulation through Collect conversion, through compare of analysis, process, through the 78th, 79, 80, the 5th of one group of 8421 code signal to four bidirectional analog switch integrated circuit U1 exported in 81 pin positions, 6, 12, 13 pin positions, the corresponding biased electrical resistance of controlling triode Q1 of 16 kinds of states is arranged, reach the control purpose that makes triode Q1 output current value relatively large, and can not cause the problems such as the panel board reading is fuzzy because of outside high light.
While travelling at night with the car that should travel, light sensor also can will detect darker analog optical signal, after resistance R 15 and R16 dividing potential drop, the 100th pin AD port to single-chip microcomputer U2 is carried a voltage signal, through Collect conversion, it is digital signal, through compare of analysis, process again, single-chip microcomputer U2 the 78th, 79, 80, the 5th of one group of 8421 code signal to four bidirectional analog switch integrated circuit U1 exported in 81 pin positions, 6, 12, 13 pin positions, the corresponding biased electrical resistance of controlling triode Q1 of 16 kinds of states is arranged, reach the control purpose that makes triode Q1 output current value less, and can because causing outside night, the panel board bias light is dazzling does not affect the problems such as reading is fuzzy.
Also having a kind of situation is to transfer the cloudy day to by fine day in running car, now combination instrument detection and control function also can refresh and regulate the size that the set of number code signal of controlling output drives control triode Q1 current value at random, reach the purpose of comfortable visual effect.
To sum up, the extraneous light intensity that the utility model can detect according to light sensor automatically changes the brightness of the background light source of combination instrument in real time, no matter makes under which kind of light condition, and the driver all can clearly read the reading of combination instrument.
Embodiment shown in above foundation is graphic describes structure of the present utility model, feature and action effect in detail; the foregoing is only preferred embodiment of the present utility model; but the utility model does not limit practical range with shown in drawing; every change of doing according to conception of the present utility model; or be revised as the equivalent embodiment of equivalent variations; when not exceeding yet specification and illustrating contain spiritual, all should be in protection range of the present utility model.
Claims (8)
1. one kind based on digitally coded automobile combination instrument background light circuit, and it comprises background light source, main control module and light sensor, it is characterized in that: described circuit also comprises triode and switch element, wherein,
The collector electrode of described triode connects described background light source;
Described switch element comprises the emitter that is connected in parallel on respectively described triode and at least two switching branches at base stage two ends; Described switching branches comprises bidirectional analog switch and the biasing resistor be one another in series, and the control end of the bidirectional analog switch of each switching branches connects respectively a plurality of signal output parts of main control module correspondingly; Described main control module according to the light intensity signal of light sensor collection to each control end output the digital coding for the folding condition of the bidirectional analog switch of controlling each switching branches, with the size of the bias voltage of adjusting described triode.
2. according to claim 1 based on digitally coded automobile combination instrument background light circuit, it is characterized in that: described digital coding is 8421 yards.
3. according to claim 1 based on digitally coded automobile combination instrument background light circuit, it is characterized in that: the biasing resistor of described each switching branches is differing from each other.
4. described based on digitally coded automobile combination instrument background light circuit according to any one in claims 1 to 3, it is characterized in that: described switch element comprises the emitter that is connected in parallel on respectively described triode and four switching branches at base stage two ends, and the control end of the bidirectional analog switch of described four switching branches connects respectively four signal output parts of main control module correspondingly.
5. described based on digitally coded automobile combination instrument background light circuit according to any one in claims 1 to 3, it is characterized in that: described light sensor is arranged on the car windscreen top.
6. described based on digitally coded automobile combination instrument background light circuit according to any one in claims 1 to 3, it is characterized in that: described main control module is single-chip microcomputer.
7. described based on digitally coded automobile combination instrument background light circuit according to any one in claims 1 to 3, it is characterized in that: described light sensor is one or more in photoelectric tube, photomultiplier, photo resistance, phototriode.
8. described based on digitally coded automobile combination instrument background light circuit according to any one in claims 1 to 3, it is characterized in that: described background light source is light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202852435U CN203327298U (en) | 2013-05-23 | 2013-05-23 | Automobile combination instrument backlight circuit based on digital coding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202852435U CN203327298U (en) | 2013-05-23 | 2013-05-23 | Automobile combination instrument backlight circuit based on digital coding |
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| Publication Number | Publication Date |
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| CN203327298U true CN203327298U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202852435U Expired - Fee Related CN203327298U (en) | 2013-05-23 | 2013-05-23 | Automobile combination instrument backlight circuit based on digital coding |
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| Country | Link |
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| CN (1) | CN203327298U (en) |
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2013
- 2013-05-23 CN CN2013202852435U patent/CN203327298U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20190523 |