CN101329835B - LED luminous element for integrated display control device - Google Patents
LED luminous element for integrated display control device Download PDFInfo
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- CN101329835B CN101329835B CN200810111978XA CN200810111978A CN101329835B CN 101329835 B CN101329835 B CN 101329835B CN 200810111978X A CN200810111978X A CN 200810111978XA CN 200810111978 A CN200810111978 A CN 200810111978A CN 101329835 B CN101329835 B CN 101329835B
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Abstract
The invention discloses an LED luminous element of an integrated display control device. The LED luminous element comprises a display control device and at least one LED chip; one end of the chip is connected with the output control end of the display control device, and the other end is connected with the power-cord end or the ground-wire end of the display control device; the display control device, the at least one LED chip and an encapsulation body are encapsulated wholly so as to form the LED luminous element of the integrated display control device, which contains a power-cord pin, a ground-wire pin and at least two signal input pins. The pins of the LED luminous element of the integrated display control device are at least partially embedded into the encapsulation body. The adoption of the LED luminous element of the invention simplifies the structure of a PCB cloth plate, lowers costs and facilitates the application.
Description
Technical field
The invention belongs to LED lighting device technical field, particularly a kind of LED light-emitting component of integrated display control device.
Background technology
Along with being extensive use of of LED, adopting LED emission three primary colors to be made in a large number, and be used for message panel or billboard in sports ground, side of buildings, the railway station with the LED display device that forms image according to pixel.
At present, nearly all LED screen all is to adopt width modulation to control brightness degree.Realize brilliance control with pulse duration modulation method, periodically-varied light impulse length (being dutycycle) just, as long as this cycle that repeats to light is enough short, human eye is that imperceptible light emitting pixel is in shake.
But, use in the luminous process of pulse-width modulation method control LED in reality, can appear at the situation of brightness irregularities in the display cycle.For example, usually, the display frequency of LED display is 300 hertz, be to be about 3 milliseconds the display cycle, if in this display cycle, the waveform of pulse signal in continuous several cycles of output all is PWMa waveform as shown in Figure 1, as it being taken with video camera, the aperture time of supposing this video camera is 1 millisecond, promptly this pulse waveform is sampled, and the sampling period is 1 millisecond, approximately sample three times in the display cycle at this LED, then the signal that might adopt is low level entirely or is high level entirely, and like this, uneven phenomenon will appear in the LED display brightness that photographs.If the display cycle is long, also can produce the flicker that human eye can be distinguished.
Present stage, display control unit is that one or more LED light-emitting components are connected respectively with one or more driving circuits with the mounting means of LED light-emitting component, and then goes to be connected with control circuit.Especially the LED light-emitting component that contains a plurality of chips, the cathode terminal of each chip all needs to be connected with control circuit and power supply with anode tap, and contain many signal control lines, and because signal wire quantity is more, the circuit of LED lamp will be very complicated, increased the cost of cable and light fixture external plug-in, cost is huge, and the corresponding probability that breaks down also improves greatly.
Summary of the invention
The present invention is in order to solve deficiency of the prior art, particularly a kind of LED light-emitting component of integrated display control device.
Technical scheme of the present invention is as follows:
A kind of LED light-emitting component of integrated display control device, described LED light-emitting component comprises:
Display control unit, it comprises mains terminals, ground terminal, control output end and at least two signal input parts.
At least one led chip, an end of led chip is connected with the control output end of display control unit, and its other end links to each other with the mains terminals or the ground terminal of display control unit.Wherein, a control output end of control device circuit both can link to each other with a plurality of led chips, also can link to each other with a plurality of or single led chip respectively a plurality of control output ends.
With described display control unit, at least one led chip and package main body overall package, make contain the power lead pin, the LED light-emitting component of integrated display control device of wire pin and at least two signal input pins, the pin of the LED light-emitting component of described integrated display control device is partially submerged in the package main body at least.
Described display control unit also can comprise at least two signal output parts, then with after described display control unit, at least one led chip and the package main body overall package, the LED light-emitting component of described integrated display control device also contains at least two signal output pins;
Wherein, described signal output pin can carry out cascade with the signal input pin of the LED light-emitting component of another integrated display control device.
Also contain heat-radiating substrate in the described package main body, and the LED light-emitting component overall package of described heat-radiating substrate and described integrated display control device, described heat-radiating substrate is copper heat-radiating substrate, aluminum heat-radiating substrate or other heat-radiating substrates.
Contain at least one display control unit in the LED light-emitting component of described integrated display control device, the signal wire of described display control unit comprises the clock input signal line and shows input signal cable.
Described display control unit comprises:
Data reception module is by signal input pin receive clock signal and shows signal;
Memory module, this shows signal of intercepting and buffer memory part from described data reception module;
Processing module, receive the part shows signal in described clock signal and the described memory module, to be divided into the plurality of sub cycle display cycle according to this part shows signal, get the Cycle Length of fixed each subcycle, and determine the pulse width of pulse signal in each subcycle, and export this pulse signal according to this part shows signal;
Driver module, the pulse signal of receiving processing module output, luminous in order to drive at least one led chip.
Described processing module comprises:
The periodic Control unit receives described clock signal, and this display cycle is divided into the experimental process cycle, and determines the Cycle Length of each subcycle, the output cycle control signal;
At least one pulse data processing unit receives the shows signal in this cycle control signal and the corresponding described memory module, determines the pulse width in this each subcycle, the production burst control signal;
At least one pulse generation unit receives this clock signal and this pulse control signal, exports described pulse signal.
Described periodic Control unit comprises:
First counter receives the periodic signal S5 that described clock signal, subcycle number N and first comparer feed back, and determines the number of subcycle, output count signal S1;
First divider receives the Cycle Length T and the subcycle number N that store, calculates T/N, exports its quotient M to first adder, exports its remainder values n to first selector;
First selector receives this remainder values n and count signal S1, and signal S2 is selected in output;
First adder receives this clock signal, this quotient M and this selection signal S2, determines the Cycle Length of each subcycle, output cycle control signal S3;
By this first selector and first adder, can obtain in the whole display cycle, the pulse width that n subcycle arranged is M+1, the pulse width of all the other N-n subcycle is M.
Described pulse data processing unit comprises:
Second counter receives described clock signal, described each subcycle length is counted output count signal S4;
First comparer, this cycle control signal S3 and this count signal S4 that receive are compared, when its value equates, export the pulse that a duration equates with the value of this cycle control signal S3, the number of exporting this pulse equates with the value of described count signal S1, when it is unequal, does not export pulse, periodic signal S5 is formed in the pulse of this first comparer output, simultaneously this periodic signal S5 is fed back to described first counter;
Second divider, receiving cycle pulse width A and described subcycle number N calculate A/N, export its quotient B to second adder, export its remainder values n ' to second selector;
Second selector receives this remainder values n ' and described count signal S1, and signal S6 is selected in output;
Second adder receives this clock signal, this quotient B and this selection signal S5, determines the pulse width of each subcycle, output cycle control signal S7;
By this second selector and second adder, can obtain in the whole display cycle, the pulse width that the individual subcycle of n ' is arranged is B+1, the pulse width of the individual subcycle of all the other N-n ' is B;
Second comparer, this cycle control signal S7 and this count signal S4 that receive are compared, when its value equates, export the pulse that a duration equates with the value of this cycle control signal S7, the number of exporting this pulse equates with the value of described count signal S1, when it is unequal, do not export pulse, pulse control signal is formed in the pulse of this second comparer output.
Described at least one led chip is a kind of or their combination in red, green or the blue led chip.
When described led chip was two, the annexation between led chip was a serial or parallel connection.
Described led chip is three or three when above, and the annexation between led chip is series, parallel or series-parallel connection.
Beneficial effect of the present invention is as follows:
1, integrated by display control unit and led chip, designs simplification in the time of can making the PCB fabric swatch, cost reduces, reduces the PCB size, has strengthened the dirigibility of control.
2, adopt the LED light-emitting component of integrated display control device, can make a LED light-emitting component show red, green, blue or multiple color such as white, and circuit connects simple and easy relatively.
3, adopt the LED light-emitting component of integrated display control device, can make this light-emitting component uniformly light-emitting in a display cycle.
4, because display control unit and led chip are encapsulated, the heat that display control unit came out can directly dispel the heat from the heat abstractor of led chip, has reduced the heat dissipation design of display control unit heat radiation, has reduced cost.
Description of drawings
Fig. 1 is the synoptic diagram of the embodiment of the present application 1;
Fig. 2 is the synoptic diagram of the embodiment of the present application 2;
Fig. 3 is the synoptic diagram of the embodiment of the present application 3;
Fig. 4 is the synoptic diagram of the embodiment of the present application 4;
Fig. 5 is for showing the synoptic diagram of display control unit;
Fig. 6 is for showing another synoptic diagram of display control unit.
Embodiment
Below by the drawings and specific embodiments the present invention is described in further detail.
With reference to accompanying drawing Fig. 1, Fig. 5, display device is a red LED chips 105 in the present embodiment, is connected with the control output end 106 of display control unit 107; And the anode of this led chip links to each other with the power lead 103 of display control unit 107, and its negative electrode is connected with control output end 106, adopts epoxy resin to encapsulate then, makes the LED light-emitting component 100 of integrated display control device.
The display control unit 107 of this LED light-emitting component 100 comprises as lower module:
Driver module 201 contains a control output end 106 and LED emitting red light two utmost points 105.
Data reception module 204, receive clock input signal and demonstration input signal.
Three memory module 203a, 203b and 203c, this video data of intercepting and buffer memory part from this data reception module.
Processing module 202, receive the part video data in this clock input signal and this memory module, the display cycle of this video data is divided into the plurality of sub cycle, determines the pulse width of pulse signal in each subcycle, and export this pulse signal according to this part shows signal.
Owing in this LED light-emitting component 100 red LED chips 105 is only arranged, then only need use a control output end 106 in the display control unit, all the other control output ends can be unsettled, do not use.
At this moment, display control unit can make this LED red light emitting diodes uniformly light-emitting in a display cycle by clock input signal line 101 and demonstration input signal cable 102.
Embodiment 2
With reference to accompanying drawing Fig. 2, Fig. 6, adopt a red LED chips 105 and a blue led chip in the present embodiment, and 2 LEDs chips adopt series system to connect, the anode of blue led chip 105 links to each other with the power lead 103 of display control unit 107, the negative electrode of red LED chips is connected with control output end 106, adopts epoxy resin to encapsulate then, makes the LED light-emitting component 100 of integrated display control device.
The LED light-emitting component 100 of integrated display control device contains circumscripted power line 103, ground wire 104, clock input signal line 101, a clock output signal line 101 ', shows input signal cable 102 and show output signal line 102 '.
Among this embodiment, can make the led chip of two different colours light simultaneously or close simultaneously by the control display control unit and go out, make this LED light-emitting component 100 show the mixed light of purple.
All the other principles are identical with the 1st embodiment, do not repeat them here.
Embodiment 3
With reference to accompanying drawing Fig. 3 and Fig. 5, four red LED chips parallel connections in twos are serially connected again in the present embodiment, form one group of red LED chips group 105 ', and with a control output end 106 of display control unit 107 ' be connected, in like manner, also have one group of blue led chipset 105 " with one group of green LED chipset 105 " ' respectively and other 2 control output ends 106 " with 106 " ' link to each other.
In this embodiment, both can make this LED light-emitting component 100 show red, green or blue monochromatic light, also can show the mixed light of multiple colors such as purple, orange or white by showing the control control device.
All the other principles of present embodiment are identical with the 1st embodiment, do not repeat them here.
Embodiment 4
With reference to accompanying drawing Fig. 4 and Fig. 5, the present embodiment difference from Example 1 is: one group of red LED chips group 105 control output end 106 of anode tap and display control unit 107 " ' " ' be connected, the blue led chip 105 of two series connection control output end 106 of anode tap and display control unit 107 " " is connected, the control output end 106 of the anode tap of the led chip of a green and display control unit 107 ' be connected described one group of red LED chips group 105 " '; the blue led chip 105 of two series connection " with the led chip 105 of a green ' cathode terminal and the ground terminal 109 of display control unit 107 link to each other.
All the other principles of present embodiment are identical with the 1st embodiment, do not repeat them here.
By above embodiment the present invention has been carried out further announcement, but scope of the present invention is not limited thereto, under the condition that does not depart from the present invention's design, more than each element can replace with the similar or equivalent element that affiliated technical field personnel understand.
Claims (11)
1. the LED light-emitting component of an integrated display control device is characterized in that, described LED light-emitting component comprises:
Display control unit, it comprises mains terminals, ground terminal, control output end and at least two signal input parts; This display control unit also comprises data reception module, by this signal input part receive clock signal and shows signal; Memory module, this shows signal of intercepting and buffer memory part from described data reception module; Processing module, receive the part shows signal in described clock signal and the described memory module, to be divided into the plurality of sub cycle display cycle according to this part shows signal, get the Cycle Length of fixed each subcycle, and determine the pulse width of pulse signal in each subcycle, and export this pulse signal according to this part shows signal; Driver module, the pulse signal of receiving processing module output, luminous in order to drive at least one led chip;
At least one led chip, led chip one end is connected with the control output end of display control unit, and the other end links to each other with the mains terminals or the ground terminal of display control unit;
With described display control unit, at least one led chip and package main body overall package, make contain the power lead pin, the LED light-emitting component of integrated display control device of wire pin and at least two signal input pins;
The pin of the LED light-emitting component of described integrated display control device is partially submerged in the package main body at least.
2. LED light-emitting component according to claim 1, it is characterized in that: described display control unit also comprises at least two signal output parts, then with after described display control unit, at least one led chip and the package main body overall package, the LED light-emitting component of described integrated display control device also contains at least two signal output pins;
Wherein, described signal output pin can carry out cascade with the signal input pin of the LED light-emitting component of another integrated display control device.
3. LED light-emitting component according to claim 1 and 2 is characterized in that: also contain heat-radiating substrate in the described package main body.
4. LED light-emitting component according to claim 3 is characterized in that: described heat-radiating substrate is copper heat-radiating substrate or aluminum heat-radiating substrate.
5. LED light-emitting component according to claim 1 and 2, it is characterized in that: contain at least one display control unit in the LED light-emitting component of described integrated display control device, the signal wire of described display control unit comprises the clock input signal line and shows input signal cable.
6. LED light-emitting component according to claim 1 and 2 is characterized in that, described processing module comprises:
The periodic Control unit receives described clock signal, and this display cycle is divided into the experimental process cycle, and determines the Cycle Length of each subcycle, the output cycle control signal;
At least one pulse data processing unit receives the shows signal in this cycle control signal and the corresponding described memory module, determines the pulse width in this each subcycle, the production burst control signal;
At least one pulse generation unit receives this clock signal and this pulse control signal, exports described pulse signal.
7. LED light-emitting component according to claim 6 is characterized in that, described periodic Control unit comprises:
First counter receives the periodic signal S5 that described clock signal, subcycle number N and first comparer feed back, and determines the number of subcycle, output count signal S1;
First divider receives the Cycle Length T and the subcycle number N that store, calculates T/N, exports its quotient M to first adder, exports its remainder values n to first selector;
First selector receives this remainder values n and count signal S1, and signal S2 is selected in output;
First adder receives this clock signal, this quotient M and this selection signal S2, determines the Cycle Length of each subcycle, output cycle control signal S3;
By this first selector and first adder, can obtain in the whole display cycle, the pulse width that n subcycle arranged is M+1, the pulse width of all the other N-n subcycle is M.
8. LED light-emitting component according to claim 7 is characterized in that, described pulse data processing unit comprises:
Second counter receives described clock signal, described each subcycle length is counted output count signal S4;
First comparer, this cycle control signal S3 and this count signal S4 that receive are compared, when its value equates, export the pulse that a duration equates with the value of this cycle control signal S3, the number of exporting this pulse equates with the value of described count signal S1, when it is unequal, does not export pulse, periodic signal S5 is formed in the pulse of this first comparer output, simultaneously this periodic signal S5 is fed back to described first counter;
Second divider, receiving cycle pulse width A and described subcycle number N calculate A/N, export its quotient B to second adder, export its remainder values n ' to second selector;
Second selector receives this remainder values n ' and described count signal S1, and signal S6 is selected in output;
Second adder receives this clock signal, this quotient B and this selection signal S6, determines the pulse width of each subcycle, output cycle control signal S7;
By this second selector and second adder, can obtain in the whole display cycle, the pulse width that the individual subcycle of n ' is arranged is B+1, the pulse width of the individual subcycle of all the other N-n ' is B;
Second comparer, this cycle control signal S7 and this count signal S4 that receive are compared, when its value equates, export the pulse that a duration equates with the value of this cycle control signal S7, the number of exporting this pulse equates with the value of described count signal S1, when it is unequal, do not export pulse, pulse control signal is formed in the pulse of this second comparer output.
9. LED light-emitting component according to claim 1 and 2 is characterized in that: described led chip can be a kind of or their combination in redness, green or the blue led chip.
10. LED light-emitting component according to claim 9 is characterized in that: when described led chip was two, the annexation between led chip was a serial or parallel connection.
11. LED light-emitting component according to claim 9 is characterized in that: described led chip is three or three when above, and the annexation between led chip is series, parallel or series-parallel connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810111978XA CN101329835B (en) | 2008-05-20 | 2008-05-20 | LED luminous element for integrated display control device |
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| CN200810111978XA CN101329835B (en) | 2008-05-20 | 2008-05-20 | LED luminous element for integrated display control device |
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| CN101329835B true CN101329835B (en) | 2010-12-15 |
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| CN101594719B (en) * | 2009-05-08 | 2014-12-03 | 北京中庆微数字设备开发有限公司 | Offline control device |
| US9818804B2 (en) * | 2015-09-18 | 2017-11-14 | Universal Display Corporation | Hybrid display |
| CN107833554B (en) * | 2017-09-22 | 2024-01-12 | 富满微电子集团股份有限公司 | Pulse modulation control method and system adopting balance segmentation algorithm |
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Effective date of registration: 20110415 Address after: 518110 Guangdong city of Shenzhen province Baoan District Guanlan Street South Ring concept (and Village) yishida Science Park Patentee after: Shenzhen EASTAR Electronic Co., Ltd. Address before: 100085 Beijing city Haidian District East Road No. 1 building E room 402B power Creative Park Patentee before: Beijing Jushu Digital Technology Development Co., Ltd. |
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Address after: 518000 Guangdong province Shenzhen city Longgang District Guanlan Street South Ring concept yishida Science Park Patentee after: Shenzhen Eastar Electronic Co., Ltd. Address before: 518110 Guangdong city of Shenzhen province Baoan District Guanlan Street South Ring concept (and Village) yishida Science Park Patentee before: Shenzhen EASTAR Electronic Co., Ltd. |
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Address after: Guanlan street of Longhua city of Shenzhen province Guangdong District 518000 south ring concept yishida Science Park Patentee after: Shenzhen Eastar Electronic Co., Ltd. Address before: 518000 Guangdong province Shenzhen city Longgang District Guanlan Street South Ring concept yishida Science Park Patentee before: Shenzhen Eastar Electronic Co., Ltd. |