CN104505016A - Display driving circuit, display driving device, display device and driving method - Google Patents
Display driving circuit, display driving device, display device and driving method Download PDFInfo
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- CN104505016A CN104505016A CN201510017051.XA CN201510017051A CN104505016A CN 104505016 A CN104505016 A CN 104505016A CN 201510017051 A CN201510017051 A CN 201510017051A CN 104505016 A CN104505016 A CN 104505016A
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Abstract
The invention relates to the technical field of display and discloses a display driving circuit. The display driving circuit comprises an all-black signal determining end, a first switch and a second switch. The all-black signal determining end is connected to the first switch and the switch and used for controlling the first switch to turn off the connection between the output end of a data line of the display driving circuit and the data line and controlling the second switch to connect the data line to the ground or a common electrode line when an all-black signal is determined. The invention further discloses a display driving device, a driving method of the display driving device and a display device. The display driving circuit controls the first switch to turn off the connection between the output end of the data line of the display driving circuit and the data line and controlling the second switch to connect the data line to the ground or the common electrode line when an all-black signal is determined through an all-black signal determining end, so that the display driving circuit does not output a data line driving circuit of the all-black screen, and accordingly the power consumption is reduced.
Description
Technical field
The present invention relates to display technique field, particularly a kind of display driver circuit, display drive apparatus, display device and driving method.
Background technology
When being shown as complete black picture, the driving circuit (Drive-IC) of existing display device can export the data line signal of complete black picture to display device.Complete black picture can be regarded as does not have picture to show, but driving circuit also will export the signal of complete black picture, therefore, makes display device relative power consumption larger.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: the power consumption how reducing display device when showing complete black picture.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of display driver circuit, comprise: black signal judges end, the first switch and second switch, described black signal judges that end connects described first switch and second switch, control the data line output terminal of the first switch OFF display driver circuit and the connection of data line during for being judged as complete black picture signal, and control second switch by data line ground connection or be connected to public electrode wire.
Wherein, described first switch and second switch are the thin film transistor (TFT) that significant level is contrary respectively, first switch and second switch grid separately is all connected described black signal and judges end, the source electrode of the first switch connects described data line output terminal, drain electrode connects described data line, the source electrode of second switch connects described public electrode wire or ground connection, and drain electrode connects described data line.
Present invention also offers a kind of display drive apparatus, comprise: sequential control circuit and above-mentioned display driver circuit, described sequential control circuit connects described black signal and judges end, when described sequential control circuit is used for complete black picture signal being detected, judge end output first level to described black signal, otherwise judge that end exports the second electrical level contrary with described first level potential to described black signal.
Wherein, described sequential control circuit comprises: complete black picture detection unit and signal export stop element, triggers described signal and export stop element generation described first level when described complete black picture detection unit is used for complete black picture signal being detected.
Wherein, whether described complete black picture detection unit is complete black picture signal by the picture signal of input is latched and analyzed.
Present invention also offers a kind of display device, comprise the display drive apparatus described in above-mentioned any one.
Present invention also offers the driving method of the display drive apparatus described in a kind of above-mentioned any one, comprising:
Described sequential control circuit exports described first level to described display driver circuit when complete black picture signal being detected;
Described display driver circuit controls the data line output terminal of the first switch OFF display driver circuit and the connection of data line, and controls second switch by data line ground connection or be connected to public electrode wire.
(3) beneficial effect
Display driver circuit of the present invention controls the data line output terminal of the first switch OFF display driver circuit and the connection of data line when judging that end is judged as complete black picture signal by black signal, and control second switch by data line ground connection or be connected to public electrode wire, make display driver circuit not export the data line drive singal of complete black picture, thus reduce power consumption.
Accompanying drawing explanation
Fig. 1 is a kind of display driver circuit schematic diagram of the embodiment of the present invention;
Fig. 2 is a kind of display drive apparatus schematic diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1 (shown in dotted line frame), a kind of display driver circuit of the invention process, comprising: black signal judges end D1, the first switch T1 and second switch T2.Black signal judges that end D1 connects the first switch T1 and second switch T2, control the first switch T1 during for being judged as complete black picture signal and turn off the data line output terminal D2 of display driver circuit and the connection of data line Dataline, and control second switch T2 by data line Data line ground connection or be connected to public electrode wire.If display device is senior super dimension field switch technology (ADvanced SuperDimension Switch, ADS) pattern, when data line Data line is connected to public electrode wire by second switch T2, display device is complete black display; If display device is twisted nematic (Twist Nematic, TN) pattern, display device during data line Data line ground connection is complete black display by second switch T2, and Contact patch has been shown in Fig. 1.
In the present embodiment, the first switch T1 and second switch T2 is the thin film transistor (TFT) (TFT) that significant level is contrary respectively.First switch T1 and second switch T2 grid separately is all connected black signal and judges end D1, the source electrode connection data line output terminal D2 of the first switch T1, drain electrode connects described data line Data line, the source electrode of second switch T2 connects public electrode wire or ground connection, and drain electrode connects described data line Data line.
Present invention also offers a kind of display drive apparatus, as shown in Figure 2, this display drive apparatus comprises: sequential control circuit and above-mentioned display driver circuit.Sequential control circuit connects black signal and judges end D1, when sequential control circuit is used for complete black picture signal being detected, judges that end D1 exports the first level to black signal, otherwise judges that end D1 exports the second electrical level contrary with the first level potential to black signal.Such as, in Fig. 2, first switch T1 is Low level effective, second switch T2 is that high level is effective, when sequential control circuit detects complete black picture signal, judge that end D1 exports high level to black signal, now the first switch T1 disconnects, with the connection of turn-off data line output terminal D2 and data line Data line, second switch T2 conducting, makes data line Data line ground connection.
Particularly, sequential control circuit comprises: complete black picture detection unit and signal export stop element.When complete black picture detection unit is used for complete black picture signal being detected, trigger pip exports stop element and produces the first level.Complete black picture detection unit is by latch the picture signal of input and to analyze that (mainly there is Frame latch sequential control circuit inside, can by new number of whole Frame latch, sequential control circuit is analyzed at the signal for each sub-pix) whether be complete black picture signal.Certain sequential control circuit also comprises other existing functional modules, its connected mode is identical with existing, and T1 disconnects the data line output terminal D2 of the embodiment of the present invention and the connection of data line Data line after complete black picture signal being detected, when complete black picture signal not detected, by normal flow work, therefore do not affect the workflow of other existing functional modules yet.
Present invention also offers the driving method of above-mentioned display drive apparatus, comprise step:
Described sequential control circuit exports described first level to described display driver circuit when complete black picture signal being detected.
Described display driver circuit controls the data line output terminal of the first switch OFF display driver circuit and the connection of data line, and controls second switch by data line ground connection or be connected to public electrode wire.
Present invention also offers a kind of display device, comprise above-mentioned display drive apparatus.This display device can be: any product or parts with Presentation Function such as liquid crystal panel, Electronic Paper, mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (7)
1. a display driver circuit, it is characterized in that, comprise: black signal judges end, the first switch and second switch, described black signal judges that end connects described first switch and second switch, control the data line output terminal of the first switch OFF display driver circuit and the connection of data line during for being judged as complete black picture signal, and control second switch by data line ground connection or be connected to public electrode wire.
2. display driver circuit as claimed in claim 1, it is characterized in that, described first switch and second switch are the thin film transistor (TFT) that significant level is contrary respectively, first switch and second switch grid separately is all connected described black signal and judges end, the source electrode of the first switch connects described data line output terminal, drain electrode connects described data line, and the source electrode of second switch connects described public electrode wire or ground connection, and drain electrode connects described data line.
3. a display drive apparatus, it is characterized in that, comprise: sequential control circuit and the display driver circuit described in claim 1 or 2, described sequential control circuit connects described black signal and judges end, when described sequential control circuit is used for complete black picture signal being detected, judge end output first level to described black signal, otherwise judge that end exports the second electrical level contrary with described first level potential to described black signal.
4. display drive apparatus as claimed in claim 3, it is characterized in that, described sequential control circuit comprises: complete black picture detection unit and signal export stop element, triggers described signal and export stop element generation described first level when described complete black picture detection unit is used for complete black picture signal being detected.
5. as claimed in claim 4, it is characterized in that, whether described complete black picture detection unit is complete black picture signal by the picture signal of input is latched and analyzed.
6. a display device, is characterized in that, comprises the display drive apparatus according to any one of claim 3 ~ 5.
7. based on a driving method for the display drive apparatus according to any one of claim 3 ~ 5, it is characterized in that, comprising:
Described sequential control circuit exports described first level to described display driver circuit when complete black picture signal being detected;
Described display driver circuit controls the data line output terminal of the first switch OFF display driver circuit and the connection of data line, and controls second switch by data line ground connection or be connected to public electrode wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510017051.XA CN104505016A (en) | 2015-01-13 | 2015-01-13 | Display driving circuit, display driving device, display device and driving method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510017051.XA CN104505016A (en) | 2015-01-13 | 2015-01-13 | Display driving circuit, display driving device, display device and driving method |
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| CN104505016A true CN104505016A (en) | 2015-04-08 |
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| CN201510017051.XA Pending CN104505016A (en) | 2015-01-13 | 2015-01-13 | Display driving circuit, display driving device, display device and driving method |
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| CN106019735A (en) * | 2016-08-09 | 2016-10-12 | 京东方科技集团股份有限公司 | Display panel, display device and control method of display panel |
| WO2017024722A1 (en) * | 2015-08-13 | 2017-02-16 | 小米科技有限责任公司 | Liquid crystal driving circuit, backlight lamp circuit, terminal, device, and method |
| CN108304095A (en) * | 2018-02-09 | 2018-07-20 | 广东欧珀移动通信有限公司 | Display panel control method, device and display drive circuit |
| CN108334235A (en) * | 2018-02-09 | 2018-07-27 | 广东欧珀移动通信有限公司 | Display panel control method, device and equipment |
| CN108573669A (en) * | 2017-03-08 | 2018-09-25 | 精工爱普生株式会社 | Display device and electronic equipment |
| CN110782858A (en) * | 2019-10-15 | 2020-02-11 | 昆山龙腾光电股份有限公司 | Display device and power supply control method |
| CN114974085A (en) * | 2022-05-10 | 2022-08-30 | 绵阳惠科光电科技有限公司 | Drive circuit, pixel unit and display panel |
| US11832492B2 (en) | 2020-12-28 | 2023-11-28 | Wuhan Tianma Micro-Electronics Co., Ltd. | Display panel and display control method, and display device |
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| CN114974085A (en) * | 2022-05-10 | 2022-08-30 | 绵阳惠科光电科技有限公司 | Drive circuit, pixel unit and display panel |
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Application publication date: 20150408 |
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