CN203503279U - LED variable information sign using fault pixel luminance compensation technology - Google Patents
LED variable information sign using fault pixel luminance compensation technology Download PDFInfo
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- CN203503279U CN203503279U CN201320483542.XU CN201320483542U CN203503279U CN 203503279 U CN203503279 U CN 203503279U CN 201320483542 U CN201320483542 U CN 201320483542U CN 203503279 U CN203503279 U CN 203503279U
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- luminance compensation
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Abstract
The utility model discloses an LED variable information sign using fault pixel luminance compensation technology. The LED variable information sign mainly comprises an LED control circuit (1), and an LED lamp link (2) connected with the LED control circuit (1). The LED control circuit (1) is provided with a standby link (3) connected in parallel to the LED lamp link (2). According to the utility model, the LED lamp link and the standby link are the standby of each other, and each LED lamp in the LED lamp link is connected with an LED lamp in the standby link in parallel, so that when any one of the LED lamps in the LED lamp link or the standby link is damaged, the luminance of the corresponding standby LED lamp thereof is automatically increased, thereby overcoming the defect of pixel reduction caused by the damage of the LED lamp.
Description
Technical field
The utility model belongs to LED field of traffic, specifically refers to a kind of LED changeable-message sign that adopts failed pixel luminance compensation technology.
Background technology
LED lamp is the most frequently used a kind of electronic components of current people, due to its there is power consumption at the bottom of, the feature such as stable performance, volume be little, therefore, LED lamp has been applied on Freeway Variable Speed Signs and various pilot lamp widely.Safety in order to ensure motor vehicle driving personnel and passenger; standard GB/T 23826-2009 has made comparatively strict technical requirement to highway LED variable speed-limit sign; i.e. " in normal working conditions, the year rate out of control of pixel should be not more than per mille ".
The pixel of the highway LED variable speed-limit sign mentioned is here that base unit forms by LED lamp, and therefore, the essence of controlling pixel rate out of control is just to control the rate out of control of LED lamp.Because the rate out of control of LED lamp itself is determined because of selected brand, for example the very difficult appearance of sub-pipe of the day of import is out of control in a large number, but domestic LED of inferior brand is just easy to occur the situation of quality fluctuation, and then can cause occurring that pixel rate out of control is greater than millesimal situation and occurs in the term of life of LED variable information board, be unfavorable for the safety of driving.
Utility model content
The purpose of this utility model is to overcome current highway LED variable speed-limit sign or LED variable information board when adopting LED lamp inferior, its pixel rate out of control can be greater than per mille, thereby can not effectively meet the defect that GB requires, provide a kind of not only simple in structure, and can also effectively overcome the LED changeable-message sign failed pixel luminance compensation system of above-mentioned defect.
The purpose of this utility model is achieved through the following technical solutions: a kind of LED changeable-message sign that adopts failed pixel luminance compensation technology, mainly by LED control circuit, and the LED lamp link being connected with this LED control circuit forms, meanwhile, on this LED control circuit, be also provided with the backup link being in parallel with LED lamp link.
Described backup link is identical with the composition structure of LED lamp link, by more than one LED lamp, is connected in series and forms successively; The position of each the LED lamp in described backup link is all corresponding one by one with the LED lamp in LED lamp link, and the LED lamp in each backup link respectively with LED lamp link corresponding thereto in LED lamp be in parallel.
In order to realize preferably the utility model, described backup link (3) is 2 with the quantity sum of LED lamp link (2), or 2 integral multiple.
The utility model is compared and is had the following advantages and beneficial effect compared with prior art:
(1) the utility model one-piece construction is very simple, and its usability is very reliable.
(2) LED lamp link of the present utility model and backup link are to backup each other, and each LED lamp in LED lamp link respectively with backup link in LED lamp be in parallel, when therefore any one the LED lamp in LED lamp link or backup link damages, the LED lamp of another backup of answering in contrast just can increase brightness automatically, thereby effectively overcomes the defect of damaging the pixel reduction causing because of LED lamp.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Fig. 2 is that LED lamp link of the present utility model and backup link sum are the one-piece construction schematic diagram of 2 o'clock.
Fig. 3 is that LED lamp link of the present utility model and backup link sum are the one-piece construction schematic diagram of 4 o'clock.
Reference numeral title in above accompanying drawing is respectively:
1-LED control circuit, 2-LED lamp link, 3-backup link, 4-LED lamp.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, the LED control circuit 1 in the present embodiment is current general mature technology, the creation point that the utility model has been done not on this LED control circuit 1, but at it for showing the LED identification light of shades of colour and icon.
As shown in the figure, this LED identification light is by LED lamp link 2, and forms with the mutually redundant backup link 3 of this LED lamp link 2.This LED lamp link 2 is identical with the structure of backup link 3, is all to be composed in series successively by more than one LED lamp 4, i.e. quantity and position homogeneous one correspondence of the LED lamp 4 in this LED lamp link 2 and backup link 3.Meanwhile, each the LED lamp 4 in backup link 3 all will with LED lamp link 2 in and with it one to one LED lamp 4 be in parallel.For convenient, understand, see on the whole, the structure of native system also can be understood from top to bottom like this, and in LED lamp link 2 and backup link 3, two LED lamps 4 rear row in parallel form one group of LED lamp group one to one, and then these LED lamp groups are in series successively again.So, native system can equivalence become series-parallel circuit.Because the electric current of series circuit equates and the equal characteristic of voltage of every group of parallel circuit, when therefore in every group, any one LED lamp 4 damages, the running current of each LED lamp 4 just can be carried on another LED lamp 4 in every group, thereby guarantees the brightness of this LED lamp 4.
For the ease of showing different colors and different icons, at least the color of two LED lamps 4 in every group is identical, and the shape of whole system is arranged according to actual conditions.
In order to ensure optimum efficiency, the quantity sum of the utility model LED lamp link 2 and backup link 3 will equal 2, or is 2 integral multiple.Wherein, when the quantity sum of LED lamp link 2 and backup link 3 is 2, its integrated circuit structure as shown in Figure 2, now, the electric current of every group of mutually redundant two LED lamps 4 of flowing through is less than half of load current value of each LED lamp 4, to guarantee that the electric current of another LED lamp 4 of flowing through can not surpass its rated current when one of them LED lamp 4 damages.
When the quantity sum of LED lamp link 2 and backup link 3 is 4, its integrated circuit structure as shown in Figure 3, accordingly, the electric current of every group of mutually redundant four LED lamps 4 of flowing through be less than each LED lamp 4 load current value 1/4, to guarantee when one of them LED lamp 4 damages, the electric current of three LED lamps 4 of the residue of flowing through can not surpass its rated current; The like.
As mentioned above, just can well realize the utility model.
Claims (3)
1. a LED changeable-message sign that adopts failed pixel luminance compensation technology, mainly by LED control circuit (1), and the LED lamp link (2) being connected with this LED control circuit (1) forms, it is characterized in that, on this LED control circuit (1), be also provided with the backup link (3) being in parallel with LED lamp link (2).
2. a kind of LED changeable-message sign that adopts failed pixel luminance compensation technology according to claim 1, it is characterized in that, described backup link (3) is identical with the composition structure of LED lamp link (2), by more than one LED lamp (4), is connected in series and forms successively; The position of each the LED lamp (4) in described backup link (3) is all corresponding one by one with the LED lamp (4) in LED lamp link (2), and the LED lamp (4) in each backup link (3) respectively with LED lamp link (2) corresponding thereto in LED lamp (4) be in parallel.
3. a kind of LED changeable-message sign that adopts failed pixel luminance compensation technology according to claim 2, is characterized in that, described backup link (3) is 2 with the quantity sum of LED lamp link (2), or 2 integral multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320483542.XU CN203503279U (en) | 2013-08-08 | 2013-08-08 | LED variable information sign using fault pixel luminance compensation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320483542.XU CN203503279U (en) | 2013-08-08 | 2013-08-08 | LED variable information sign using fault pixel luminance compensation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203503279U true CN203503279U (en) | 2014-03-26 |
Family
ID=50334239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320483542.XU Expired - Lifetime CN203503279U (en) | 2013-08-08 | 2013-08-08 | LED variable information sign using fault pixel luminance compensation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203503279U (en) |
-
2013
- 2013-08-08 CN CN201320483542.XU patent/CN203503279U/en not_active Expired - Lifetime
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |
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| CX01 | Expiry of patent term |