CN2664122Y - Driving element for lighting up display element and driving assembly - Google Patents
Driving element for lighting up display element and driving assembly Download PDFInfo
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- CN2664122Y CN2664122Y CN 03200164 CN03200164U CN2664122Y CN 2664122 Y CN2664122 Y CN 2664122Y CN 03200164 CN03200164 CN 03200164 CN 03200164 U CN03200164 U CN 03200164U CN 2664122 Y CN2664122 Y CN 2664122Y
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Abstract
The utility model discloses a driving element for lighting up display element and driving assembly. The driving element comprises a N-bit serial buffer, a K-bit extension buffer, a N-bit video data buffer and a plurality of driving current output ports, a driving current setting circuit, a plurality of current output pin, a time sequence signal pin, a serial document input pin, a serial output pin, a thrombus brake signal pin and an output control signal pin. Adding a command buffer and/or a status buffer can make the driving element not only have the traditional function of lightening a indicator element under a displaying mode, but also have novelty function of facilitating the downloading control driving element characteristic and/ or returning the state of the driving element, in case of no additional pins.
Description
Technical field
The utility model is about a kind of driving element and drives composite set, refers to a kind of driving element and driving composite set that is applicable to display element especially.
Background technology
Traditionally, driving element can be with being to promote display element (Display Device), for example: light emitting diode, fluorescent tubes etc., this display element are aligned to a square formation usually, manufacture display panel, to show integral planar (Integral and Planar) image, image, and video signal (Image, Picture, and Video) visual information such as.Each display element shows the independent pixel in the visual information.Each display element all can be received and be driven independently to each output pin of this driving element.Give each independently pixel by the change image data, the content of abundant vision is presented.
For saving the pin and the packaging cost of element, only use a clock signal (clock) pin CLK between control end 8 and the conventional ADS driving element 9, a string preface data input (serial-data-in) pin SDI and a string preface data output (serial-data-out) pin SDO, a bolt lock (latch enable) signal pin LE! , output control (output enable) signal pin OE! , reach electric current output connecting pin 901 just like the output port number ..., just image data is sent to the driving element that each display element connects, and display element is lighted; As shown in Figure 5.
Driving element generally comprises drive current initialization circuit 916, number (N, N＞1) individual drive output mouth 915, and the string preface impact damper 911 of N position, and the image data buffer 914 of N position.Wherein, string preface impact damper 911 according to usage possesses a clock signal pin CLK, a string preface data input pin SDI and a string preface data output connecting pin SDO.By bolt lock signal pin LE! , the data in string preface impact damper 911 can be sent to image data buffer 914 abreast.Drive current output port 915 can cause the energy that send driving, electric current and voltage, this cause the action of sending be by output control pin OE! Inspire.Drive current initialization circuit 916 is in order to set the size that drives energy.This is general so-called display mode.
For the characteristic of improving driving element such as: precision or complicated control is provided, and provide the function etc. of back coupling, usually more circuit can design in this driving element.Yet the function driving element that will activate aforementioned increase needs more input and output connecting pin just can reach, and will increase the complexity and the cost of element design.
The utility model people in view of this, according to the professional knowledge and the experience of association area for many years, at the problems referred to above actively research and development study, find the driving element of the utility model display element finally and drive composite set, with Jiahui industry.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of driving element that is used to light display element, except having the traditional function of under display mode, lighting display element, under the situation that does not increase pin, more can be in the following novel capabilities of carrying out following transmission control system driving element characteristic and/or passback driving element state of non-display mode.
Another purpose of the present utility model is to provide a kind of driving composite set that is used to light display element, can under the situation that does not increase pin, above-mentioned driving element be made up and carry out new function according to the actual number of display element.
For reaching above-mentioned purpose, the driving composite set that the utility model is used to light display element generally includes P driving element, each driving element can be in display mode and the work down of non-display mode, and comprise that at least a string preface data input pin connects and a string preface data output connecting pin, in order to receive and to transmit the signal that comprises an image data at least.Each driving element connects with series system, and is defined as driving element 1 in regular turn, driving element 2 ... driving element P-1, driving element P.Wherein driving element 1 still can be received the order of a peripheral control unit by string preface data input pin, sends out order and/or driving element state by string preface data output connecting pin.Driving element 2 still can receive order and/or the driving element state that driving element 1 transmits by string preface data input pin, sends out order and/or driving element state by string preface data output connecting pin.The rest may be inferred, and driving element P still can receive order and/or the driving element state that driving element P-1 transmits by string preface data input pin, sends out order and/or driving element state by string preface data output connecting pin.The string preface data output connecting pin of driving element P can optionally be connected to this controller.
Above-mentioned driving element still can comprise the string preface impact damper (serial buffer) of the individual position of a N (N＞1), one K (the extension buffer of the individual position of K≤N), the image data buffer (image dataregister) of one N position, N drive current output port, a drive current initialization circuit, N electric current output connecting pin, a clock signal (clock) pin, a bolt lock (latch enable) signal pin and output control (output enable) signal pin.Drive current initialization circuit and image data buffer are connected to the drive output mouth.Extend buffer under non-display mode, can the driving element state be sent to the order of going here and there the preface impact damper and/or receiving string preface impact damper, wherein order and send out by peripheral control unit by the trigger pip of correspondence.
Be connected to N drive current output port respectively as for N electric current output connecting pin, in order to light corresponding display element.The clock signal pin is in order to receiving clock signal, and is sent to string preface data impact damper.Bolt lock signal pin transmits data to the image data buffer in order to receive bolt lock signal with control string preface impact damper.Output control signal pin reaches control image data buffer and transmits data to the drive output mouth in order to receive the output control signal.
Above-mentioned extension buffer can be a status register (status register), also can be a command buffer (command register).Status register can be under non-display mode, and the state of driving element is sent to string preface impact damper, more can be by the current status of circuit for detecting detecting drive output mouth, and be sent to status register.Command buffer can receive the order from string preface impact damper under non-display mode.The data of command buffer can further be sent to the drive current initialization circuit through a digital/analog converter, with the real-valued electric current output of decision drive output mouth.
The corresponding trigger pip of above-mentioned activation extension buffer can be sent out by a mode switching circuit (modetransfer circuit).One preferred mode is sent out corresponding trigger pip after mode switching circuit receives one group of default bolt lock signal and output control signal.For example: in a period of time, one first pulse interval appears earlier in bolt lock signal, exports control signal afterwards and one second pulse interval occurs, and then driving element is converted to non-display mode by display mode; Otherwise, the attitude if the output control signal is remained stationary, then driving element is converted to display mode by non-display mode.
Description of drawings
Fig. 1 shows that the utility model drives the preferred embodiment of composite set.
Fig. 2 shows the interior bonds situation of the utility model driving element.
Fig. 3 shows that the utility model is converted to the pulse sequence aspect of non-display mode by display mode.
Fig. 4 shows that the utility model is converted to the pulse sequence aspect of display mode by non-display mode.
Fig. 5 shows the interior bonds situation of conventional ADS driving element.
Label declaration
1: drive composite set 10,20,30,40: driving element
11: string preface impact damper 12: command buffer
13: status register 14: the image data buffer
151～158: the drive current output port
16: the drive current initialization circuit
17: mode switching circuit 18: digital/analog converter
191～198: electric current output connecting pin 8: controller
9: conventional ADS driving element 901 ...: the electric current output connecting pin
911: string preface impact damper 914: image data buffer
915: drive current output port 916: the drive current initialization circuit
Embodiment
The drive unit principal feature of the utility model display element for not only can be under general display mode output driving current to display element, to light display element; Under non-display mode, and can be by the I-E characteristic of detecting display element, drive current is adjusted in passback driving element state and setting, revises the required drive current of display element, and does not need to increase in addition pin.
Preferred embodiment of the present utility model as shown in Figure 1, wherein drive composite set 1 in order to drive several (present embodiment is 32) LEDs, this driving composite set 1 is external to a controller 8, and this controller 8 has general coding (coding) ... etc. function.Drive composite set 1 and comprise that several (present embodiment is four) connect and identical eight driving elements 10,20,30,40 of structure with series system.
The interior bonds situation of Fig. 2 display driver element 10, it mainly comprises one eight string preface impact damper 11, one four command buffer 12, one four status register 13, one eight image data buffer 14, eight drive current output ports 151～158, one drive current initialization circuit 16,18, eight electric current output connecting pins 191～198 of one mode switching circuit, 17, one digital/analog converters, one clock signal pin CLK-1, a string preface data input pin SDI-1, a string preface data output connecting pin SDO-1, a bolt lock signal pin LE!-1, one output control signal pin OE!-1, and a resistance signal pin R1-1.
When the gamma correction of light emitting diode often, driving element 11 is in display mode work down, sequential signal pin CLK-1 is sent to string preface data impact damper 11 with the clock signal that receives in real time; String preface data input pin SDI-1 receives the string preface data of controller 8 outputs, and is sent to string preface data impact damper 11, will go here and there the preface data transmission to driving element 20 by string preface data output connecting pin SDO-1 again.Under this pattern, the string preface data of input and output string preface impact damper 11 is mainly image data.Bolt lock signal pin LE!-1 after receiving bolt lock signal, impels string preface impact damper 11 that image data is sent to image data buffer 14.Output control signal pin OE!-1 after receiving the output control signal, then impels image data buffer 14 that image data is sent to drive output mouth 151～158; Drive current initialization circuit 16 also that the driven for emitting lights diode is required electric currents are sent to drive output mouth 151～158 simultaneously.After electric current output connecting pin 191～198 is accepted the electric current of corresponding drive output mouth 151～158 transmission, just can light corresponding light emitting diode.
In the present embodiment, bolt lock signal pin LE!-1 and output control signal pin OE!-1 also has the function of switching display mode/non-display mode, and is connected to mode switching circuit 17 separately with clock signal pin CLK-1.When a light emitting diode can't be lighted, shown in Fig. 3 figure, in a period of time T0, when the first pulse interval T1 appears earlier in bolt lock signal, when exporting control signal afterwards and the second pulse interval T2 occurring, then driving element 10 can be converted to non-display mode by display mode.At this moment, mode switching circuit 17 can transmit signal to trigger status register 13 delivery statuss to going here and there preface impact damper 11, is back to controller 8 at last.
As for when a light-emitting diode luminance reduces,, can make mode switching circuit 17 transmit signal and be sent to command buffer 12 to trigger 11 orders of self-controller 8 in the future of string preface impact damper by identical active mode.Command buffer 12 is sent to drive current initialization circuit 16 with data through a digital/analog converter 18 again, exports with the real-valued electric current that determines corresponding drive output mouth 15, and exports revised electric current to drive output mouth 15.Under this pattern, the string preface data of input and output string preface impact damper 11 mainly comprises order data and image data.Because the circuit connecting mode of present embodiment makes 8 one-tenth one loops of driving element 10～40 and controller, yet for the driving composite set that only need carry out this function, driving element 40 can not be connected with controller 8.
The first pulse interval T1 of the utility model design and the second pulse interval T2 are short with respect to the time compole that light emitting diode is lighted, be about a thirtieth second, because human eyes can not discovered this small energy variation, therefore, the utility model can utilize this characteristic to control and finish the function of mode switch.In addition, pulse sequence aspect aquatic foods as shown in Figure 3 are used to promote display element less, therefore do not hinder in normal display mode.
After the unusual condition of light emitting diode is reported and is revised, in a period of time T0, the first pulse interval T1 appears earlier in bolt lock signal, exports the control signal attitude of still remaining stationary afterwards, then driving element 10 just can be converted to display mode by non-display mode, as shown in Figure 4.
The above is the connecting state and the working method of driving element 10, and the utility model is when reality is used, driving composite set as shown in Figure 1.Among the figure, the string preface data input pin SDI-2 of driving element 20 receives the string preface data of being sent out by the string preface data output connecting pin SDO-1 of driving element 10, sends out string preface data output signal by string preface data output connecting pin SDO-2 again ..., by that analogy.At last, the string preface data input pin SDI-4 of driving element 40 receives the string preface data of the string preface data output connecting pin SDI-3 transmission of driving element 30, send out string preface data to controller 8, through again the data signal of revising being sent after the work such as coding by string preface data output connecting pin SDI-4 again.
Driving element of the present utility model can more comprise the fault detecting function of a drive output mouth, and the malfunction that detects directly or indirectly is sent to this status register via a fault monitoring circuit, and carries out back coupling work by above-mentioned non-display mode.
In sum, the utility model is except having the traditional function of lighting display element under display mode, under the situation that does not increase pin, more can carry out the order of transmission control system driving element characteristic down and/or the novel capabilities of passback driving element state down in non-display mode.And become one to drive composite set by the tandem drive element, more can above-mentioned driving element be made up and be carried out new function according to the actual number of display element.Only it should be noted, the above embodiments only are preferred embodiment of the present utility model, spirit of the present utility model and scope should be as the criterion with claims, allly modify a little or other secondary element of additions and deletions according to the utility model embodiment, all should belong to scope of the present utility model.
Claims (16)
1, a kind of driving element that is used to light display element can be in display mode and the work down of non-display mode; This driving element comprises: the string preface impact damper of a N position, the extension buffer of one K position, the image data buffer of one N position, N drive current output port, a drive current initialization circuit, N electric current output connecting pin, one in order to receive clock signal, and be sent to the clock signal pin of this string preface data impact damper, a string preface data input pin, a string preface data output connecting pin, one in order to receive bolt lock signal with control this string preface impact damper transmit data to the bolt lock signal pin of image data buffer and in order to receiving the output control signal, and control the output control signal pin of this image data buffer transmission data to this drive output mouth; Wherein:
N is the integer greater than 1;
K is less than or equal to N;
This drive current initialization circuit is connected this drive output mouth respectively with this image data buffer;
This extension buffer connects this string preface impact damper;
N electric current output connecting pin is connected to N drive current output port respectively;
This string preface data input pin is connected to this string preface data impact damper;
This string preface data output connecting pin is connected to this string preface data impact damper.
2, driving element as claimed in claim 1 is characterized in that: this extension buffer is one can the state of driving element be sent to the status register of this string preface impact damper under non-display mode.
3, driving element as claimed in claim 2 is characterized in that: it also comprises one in order to the current status of detecting this drive output mouth and the circuit for detecting that is sent to this status register.
4, driving element as claimed in claim 1 is characterized in that: this extension buffer is one can receive down command buffer from this string preface impact damper order in non-display mode.
5, driving element as claimed in claim 4 is characterized in that: the data of this command buffer is sent to this drive current initialization circuit by a digital/analog converter.
6, driving element as claimed in claim 1 is characterized in that: this corresponding trigger pip is sent out by a mode switching circuit.
7, a kind of driving composite set that is used to light display element, this drive unit comprises several driving elements as claimed in claim 1, each element connects with series system, wherein, the string preface data input pin of first driving element is used to receive the image data and reception order of peripheral control unit, and string preface data output connecting pin is used to transmit image data and transmission is ordered/or image data;
The string preface data input pin of follow-up driving element is used to receive the image fuel of last driving element and receives order and/or image data, and string preface data output connecting pin is used to transmit image data and transmits order and/or image data.
8, driving composite set as claimed in claim 7 is characterized in that: the string preface data output connecting pin of the driving element of this last serial connection is connected to this controller.
9, a kind of driving composite set that is used to light display element, this drive unit comprises several driving elements, each driving element can be in display mode and the work down of non-display mode, and comprise that at least a string preface data input pin connects and a string preface data output connecting pin, in order to receive and to transmit the signal that comprises an image data at least, each driving element connects with series system, wherein:
First driving element receives the order of a peripheral control unit by string preface data input pin, sends out order and/or driving element state by string preface data output connecting pin;
The subsequent drive element receives order and/or the driving element state that last driving element transmits by string preface data input pin, sends out order and/or driving element state by string preface data output connecting pin.
10, driving composite set as claimed in claim 9 is characterized in that: the string preface data output connecting pin of this last driving element is connected to this controller.
11, driving composite set as claimed in claim 9, it is characterized in that: each driving element also comprises: the string preface impact damper of a N position, the extension buffer of one K position, the image data buffer of one N position, N drive current output port, a drive current initialization circuit, N electric current output connecting pin, one clock signal pin, a bolt lock signal pin and an output control signal pin; Wherein:
N is the integer greater than 1;
K is less than or equal to N;
This drive current initialization circuit and this image data buffer are connected to this drive output mouth;
This extends buffer and connects peripheral control unit, is used under non-display mode the order that trigger pip by correspondence is sent to this string preface impact damper with the driving element state and/or receives this string preface impact damper, and wherein this order is sent out by a peripheral control unit;
Be connected to N drive current output port respectively in order to N electric current output connecting pin lighting corresponding display element;
This clock signal pin connects this string preface data impact damper;
This bolt lock signal pin transmits data to the image data buffer in order to receive bolt lock signal to control this string preface impact damper;
This output control signal pin reaches this image data buffer of control and transmits data to this drive output mouth in order to receive the output control signal.
12, driving composite set as claimed in claim 11 is characterized in that: this extension buffer is one under non-display mode, the state of driving element is sent to the status register of this string preface impact damper.
13, driving composite set as claimed in claim 12 is characterized in that: also comprise in order to detecting the current status of this drive output mouth, and be sent to a circuit for detecting of this status register.
14, driving composite set as claimed in claim 11 is characterized in that: this extension buffer is for receiving the command buffer from the order of this string preface impact damper down in non-display mode.
15, driving composite set as claimed in claim 14 is characterized in that: the data of this command buffer is sent to this drive current initialization circuit by a digital/analog converter, to determine the real-valued electric current output of this drive output mouth.
16, driving composite set as claimed in claim 11 is characterized in that: this corresponding trigger pip is sent out by a mode switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03200164 CN2664122Y (en) | 2003-01-02 | 2003-01-02 | Driving element for lighting up display element and driving assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03200164 CN2664122Y (en) | 2003-01-02 | 2003-01-02 | Driving element for lighting up display element and driving assembly |
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| Publication Number | Publication Date |
|---|---|
| CN2664122Y true CN2664122Y (en) | 2004-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03200164 Expired - Lifetime CN2664122Y (en) | 2003-01-02 | 2003-01-02 | Driving element for lighting up display element and driving assembly |
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| CN (1) | CN2664122Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788868B (en) * | 2008-07-29 | 2011-07-27 | 友达光电股份有限公司 | Display device |
| CN102264176A (en) * | 2010-05-31 | 2011-11-30 | 聚积科技股份有限公司 | Driving device and driving system of LED (light emitting diode) |
-
2003
- 2003-01-02 CN CN 03200164 patent/CN2664122Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788868B (en) * | 2008-07-29 | 2011-07-27 | 友达光电股份有限公司 | Display device |
| CN102264176A (en) * | 2010-05-31 | 2011-11-30 | 聚积科技股份有限公司 | Driving device and driving system of LED (light emitting diode) |
| CN102264176B (en) * | 2010-05-31 | 2014-01-29 | 聚积科技股份有限公司 | Driving device of LED (light emitting diode) |
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| CX01 | Expiry of patent term |
Expiration termination date: 20130104 Granted publication date: 20041215 |