CN102681645A - Electronic device and display system - Google Patents
Electronic device and display system Download PDFInfo
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- CN102681645A CN102681645A CN2011100613806A CN201110061380A CN102681645A CN 102681645 A CN102681645 A CN 102681645A CN 2011100613806 A CN2011100613806 A CN 2011100613806A CN 201110061380 A CN201110061380 A CN 201110061380A CN 102681645 A CN102681645 A CN 102681645A
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Abstract
The invention provides an electronic device, which is used for driving a display panel and generating different output current according to a model of the display panel. The electronic device comprises a storage unit, a control unit and a current-generating unit, wherein the storage unit is used for storing a panel model/a drive voltage comparison table; the control unit is used for acquiring the model of the display panel when the electronic device is electrically connected with the display panel, inquiring the panel model/the drive voltage comparison table to acquire drive voltage and determining drive current according to the drive voltage; and the current-generating unit is used for generating the drive current to drive the display panel.
Description
Technical field
The present invention is a kind of display panel, and particularly a kind of have an electricity saving function display panel.
Background technology
For desktop PC or notebook computer; Display device is indispensable operative installations; But display device is suitable power consumption; And in order to drive the panel display image in the display device, must be by the display chip output image signal of desktop PC or notebook computer.If display device need be driven by the picture signal of high voltage, then for desktop PC or notebook computer, must improve the voltage of the picture signal of output.Otherwise if display device only needs the picture signal of low voltage just can be driven, and display chip is still exported the picture signal of high voltage, then can cause unnecessary power consumption.The desktop PC or the driving circuit of notebook computer all are the modes of taking to decide electric current output at present, and can't different output currents be provided according to display device.
Summary of the invention
One embodiment of the invention are a kind of electronic installation, in order to driving a display panel, and can produce different drive currents to the model of display panel.This electronic installation comprises a storage element, a control module and a current generating unit.Storage element stores a panel type number/driving voltage table of comparisons.Control module when this electronic installation electrically connects this display panel, is obtained a model of this display panel, and inquires about this panel model/driving voltage table of comparisons obtaining a driving voltage, and determines a drive current according to this driving voltage.Current generating unit is in order to produce this drive current, to drive this display panel.
Another embodiment of the present invention is a kind of display system, comprises a display panel and an electronic installation.Display panel comprises one first storage device, stores a model of this display panel.Electronic installation, in order to drive this display panel, this electronic installation also comprises one second storage device, a control module and a current generating unit.Second storage device stores a panel type number/driving voltage table of comparisons.When this electronic installation electrically connects this display panel; Control module is obtained a model of this display panel; And inquire about this panel model/driving voltage table of comparisons obtaining a driving voltage, and determine a drive current according to an input resistance of this driving voltage and this display panel.Current generating unit is in order to produce this drive current, to drive this display panel.
Description of drawings
Fig. 1 is the synoptic diagram according to an embodiment of a display system of the present invention.
Fig. 2 is the process flow diagram according to an embodiment of a panel control method of the present invention.
Fig. 3 is the synoptic diagram according to another embodiment of a display system of the present invention.
Fig. 4 is the synoptic diagram according to an embodiment of a current generating unit of the present invention.
Fig. 5 is the synoptic diagram according to another embodiment of a current generating unit of the present invention.
[main element label declaration]
11,31～electronic installation 12,32～display panel
13,34～control module 14,36～current generating unit
15～data memory device, 16～driver element
33～application program, 35～hardware working storage
37～panel model/driving voltage the table of comparisons 38～image processing apparatus
R, R1, R2, R3, R4～resistance S1, S2, S 3～control signal
T1, T2, T3～transistor 51,52,53,54～current source
SW1, SW2, SW3, SW4～switch
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to a graphic preferred embodiment, can clearly appear.The direction term of being mentioned in following examples, for example: upper and lower, left and right, front or rear etc. only are the directions with reference to annexed drawings.Therefore, the direction term of use is to be used for explaining not to be to be used for limiting the present invention.
Fig. 1 is the synoptic diagram according to an embodiment of a display system of the present invention.Display system comprises an electronic installation 11 and a display panel 12, and wherein display panel 12 is by 11 controls of this electronic installation.Display panel 12 has a data memory device 15 and a driver element 16.Driver element 16 is in order to drive an array of display (figure is last not to be drawn) of display panel 12.Data memory device 15 stores a model of display panel 12 and a corresponding driving voltage value.Have a current generating unit 14 in the electronic installation 11, according to a control signal of control module 13, output one outputs current to display panel 12.Control module 13 in the electronic installation 11 is obtained the model and the driving voltage value of display panel 12 earlier from data memory device 15 through a serial transmission interface; Then again according to the driving voltage value of display panel 12; Produce this control signal Control current generation unit 14, to adjust the size of this output current.The input end of driver element 16 couples a resistance R, and receiving and change this output current is one first voltage, and wherein this first voltage is equal to the driving voltage of this display panel 12 haply.
In the present embodiment; Data memory device 15 possibly be a ROM (read-only memory) (ROM; Read onlymemory), store the model and corresponding driving voltage value of the display panel of multiple different model, so panel manufacturers only need be when releasing new display panel; Add the data of the display panel of new models at data memory device 15, make data memory device 15 can be widely used in all display panels of panel manufacturers.In the present embodiment, current generating unit 14 has comprised a current mirroring circuit, has a plurality of output terminals, respectively the output current of the different sizes of input.Control circuit can determine an ideal value of this output current according to an input impedance (being generally 100 ohm) of the driving voltage value and the display panel of display panel; And control this current mirroring circuit, make the current value size of this output current approach this ideal value haply.
Fig. 2 is the process flow diagram according to an embodiment of a panel control method of the present invention.The described panel control method of present embodiment is by an electronic installation, and is performed like computing machine or notebook computer, in order to the power consumption of reduction display device, and can protect display device.Display device has a panel and a driver element, in order to drive this panel.The shows signal of panel is with low-voltage differential signal (Low-voltage differential signaling; LVDS) form appears; Therefore if the too high meeting of electric current of the electronic installation output overtension that causes panel to receive causes driver element mistake when judging the logic level of shows signal, to occur.Utilize the panel control method of present embodiment can reduce aforesaid problem, make that the electric current of electronic installation output is the standard that can meet display device, also can reduce the power consumption of electronic installation.
In step S21, when electronic installation was connected with display device, electronic installation electrically connected this display device through serial transmission interface earlier, and detected the model of the panel in this display device, and obtained a corresponding magnitude of voltage according to this model.In the present embodiment; Build a storage device in the possibility in the display device; Store the panel type number and the driving voltage table of comparisons, when electronic installation is obtained the model of the panel in the display device, capture the sub-device of wiring back together with this panel model and the driving voltage table of comparisons.In another embodiment, this panel model and the driving voltage table of comparisons possibly be to be stored in the electronic installation.Then in step S22, this table of comparisons of control module inquiry in the electronic installation is to obtain the driving voltage value corresponding to the panel of this display device.In step S23, control module determines a current value according to an input impedance of this driving voltage value and this display device, and according to an output current of this electronic installation of the whole adjustment of this electric current, this output current is equated or approaches this current value.
Fig. 3 is the synoptic diagram according to another embodiment of a display system of the present invention.Electronic installation 31 comprises an application program 33, control module 34, hardware working storage 35, current generating unit 36, panel model/driving voltage table of comparisons 37 and image processing apparatus 38.Display panel 32 stores the model of this display panel according to a storage element 39 is arranged, and wherein this storage element 39 is a ROM (read-only memory).When electronic installation 31 connected this display panel 32, control module 34 was obtained the model of display panel 32 in storage element 39 through a serial transmission interface.Be connected to control module 34 inquiry panel model/driving voltage tables of comparisons 37, obtain a driving voltage, and determine a drive current according to an input impedance of this driving voltage and this display panel.Control module 34 produces a control signal according to this drive current, and sends hardware working storage 35 to change a temporary value of hardware working storage 35.The temporary value of hardware working storage 35 is in order to an output current of Control current generation unit 36, so control module 34 can be adjusted the size of the output current of current generating unit 36 through this control signal.In the present embodiment, control module 34 be Basic Input or Output System (BIOS) (basic input and output system, BIOS).Electronic installation 31 can be controlled Basic Input or Output System (BIOS) to change the temporary value of hardware working storage 35 through application program 33.
In the present embodiment, current generating unit 36 is realized by a current mirroring circuit.Graphics processing unit 38 is adjusted the voltage level of a shows signal according to the output current of current generating unit 36, and sends this shows signal to display panel 32.In the present embodiment, the shows signal of panel is that form with low-voltage differential signal is appeared.In another embodiment, current generating unit 36 possibly comprise a plurality of resistance, adjusts the output current of current generating unit 36 through controlling annexation between this constant resistance.Please refer to Fig. 4.Fig. 4 is the synoptic diagram according to an embodiment of a current generating unit of the present invention.In Fig. 4, the size of output current I possibly influenced by resistance R, R1, R2 and R4.If transistor T 1 is not switched on, then resistance R 2 can not exert an influence to output current I.In like manner, if transistor T 2 is not switched on, then resistance R 3 can not exert an influence to output current I; If transistor T 3 is not switched on, then resistance R 3 can not exert an influence to output current I.Therefore, can adjust the size of output current I through the voltage level that changes control signal S1, S2 and S3.
Fig. 5 is the synoptic diagram according to another embodiment of a current generating unit of the present invention.In Fig. 5, output current I is determined by the electric current of current source 51,52,53 and 54.If switch SW 1 and SW3 conducting, then output current I be electric current I 1 and with.If have only switch SW 4 conductings, then output current I is an electric current I 4.If switch SW 1, SW2, SW3 and the whole conductings of SW4, then output current I be electric current I 1, I2, I3 and I4's and.Therefore can adjust the size of output current through CS device SW1, SW2, SW3 and SW4.
The above person of thought; Be merely preferred embodiment of the present invention; When not limiting the scope that the present invention implements with this, the simple equivalent of promptly doing according to claim scope of the present invention and invention description generally changes and modifies, and all still belongs in the scope that claim of the present invention contains.Arbitrary embodiment of the present invention in addition or claim scope must not reached whole purposes or advantage or the characteristics that the present invention discloses.In addition, summary part and title only are the usefulness that is used for assisting the patent document search, are not to be used for limiting claim scope of the present invention.
Claims (8)
1. electronic installation in order to drive a display panel, comprising:
One storage element stores a panel type number/driving voltage table of comparisons;
One control module when this electronic installation electrically connects this display panel, is obtained a model of this display panel, and inquires about this panel model/driving voltage table of comparisons obtaining a driving voltage, and determines a drive current according to this driving voltage; And
One current generating unit is in order to produce this drive current, to drive this display panel.
2. electronic installation according to claim 1, wherein this control module produces a control signal according to this driver element and produces this drive current to control this current generating unit.
3. electronic installation according to claim 1, wherein this current generating unit comprises a current mirroring circuit.
4. electronic installation according to claim 1, wherein this control module is obtained this model of this display panel through a serial transmission interface, and this model is stored in a ROM (read-only memory) of this display panel.
5. electronic installation according to claim 1, wherein this electronic installation produces a shows signal to drive this display panel according to this drive current.
6. display system comprises:
One display panel comprises one first storage device, stores a model of this display panel; And
One electronic installation, in order to drive this display panel, this electronic installation also comprises:
One second storage device stores a panel type number/driving voltage table of comparisons;
One control module; When this electronic installation electrically connects this display panel; Obtain a model of this display panel, and inquire about this panel model/driving voltage table of comparisons obtaining a driving voltage, and determine a drive current according to an input resistance of this driving voltage and this display panel; And
One current generating unit is in order to produce this drive current, to drive this display panel.
7. display system according to claim 6, wherein this current generating unit comprises a current mirroring circuit.
8. display system according to claim 6, wherein this control module is obtained this model of this display panel through a serial transmission interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100613806A CN102681645A (en) | 2011-03-15 | 2011-03-15 | Electronic device and display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100613806A CN102681645A (en) | 2011-03-15 | 2011-03-15 | Electronic device and display system |
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| CN102681645A true CN102681645A (en) | 2012-09-19 |
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| CN2011100613806A Pending CN102681645A (en) | 2011-03-15 | 2011-03-15 | Electronic device and display system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105658143A (en) * | 2013-10-25 | 2016-06-08 | 豪夫迈·罗氏有限公司 | System and method for display type detection of a handheld medical device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6275209B1 (en) * | 1997-04-24 | 2001-08-14 | Rohm Co., Ltd. | LCD driver |
| CN1485728A (en) * | 2002-08-22 | 2004-03-31 | Lg电子株式会社 | Display apparatus |
| KR100551731B1 (en) * | 2003-03-25 | 2006-02-13 | 비오이 하이디스 테크놀로지 주식회사 | The Driving Method Of Liquid Crystal Display Device |
| CN101241686A (en) * | 2007-02-07 | 2008-08-13 | 明基电通股份有限公司 | Display system and its control method |
-
2011
- 2011-03-15 CN CN2011100613806A patent/CN102681645A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6275209B1 (en) * | 1997-04-24 | 2001-08-14 | Rohm Co., Ltd. | LCD driver |
| CN1485728A (en) * | 2002-08-22 | 2004-03-31 | Lg电子株式会社 | Display apparatus |
| KR100551731B1 (en) * | 2003-03-25 | 2006-02-13 | 비오이 하이디스 테크놀로지 주식회사 | The Driving Method Of Liquid Crystal Display Device |
| CN101241686A (en) * | 2007-02-07 | 2008-08-13 | 明基电通股份有限公司 | Display system and its control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105658143A (en) * | 2013-10-25 | 2016-06-08 | 豪夫迈·罗氏有限公司 | System and method for display type detection of a handheld medical device |
| CN105658143B (en) * | 2013-10-25 | 2019-10-11 | 豪夫迈·罗氏有限公司 | The system and method that type of display for handheld medical device detects |
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Application publication date: 20120919 |