CN202650503U - Pixel drive circuit and display device - Google Patents
Pixel drive circuit and display device Download PDFInfo
- Publication number
- CN202650503U CN202650503U CN 201220359569 CN201220359569U CN202650503U CN 202650503 U CN202650503 U CN 202650503U CN 201220359569 CN201220359569 CN 201220359569 CN 201220359569 U CN201220359569 U CN 201220359569U CN 202650503 U CN202650503 U CN 202650503U
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- pixel
- electric charge
- control line
- signal lines
- driving circuit
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Abstract
The utility model discloses a pixel drive circuit, relating to the technical field of display. The pixel drive circuit comprises a charge sharing control line and a plurality of pixel driving signal lines, and is characterized in that among the pixel driving signal lines, the signal lines of the same polarity are grouped in pair, a short circuiting switch is arranged between the two signal lines in each pair, and the short circuiting switch is connected with the charge sharing control line and used for connecting or disconnecting the two signal lines in the same pair under the control of the charge sharing control line. The utility model further discloses a display device comprising the pixel drive circuit. When the pixel drive circuit disclosed by the utility model is in a charge sharing stage, voltage is neutralized into a mean value of the voltage of the two signal lines, and thus, the voltage of the two signal lines can reach the desired voltage according to the mean value easily in a charging stage, so that a power saving effect is achieved.
Description
Technical field
The utility model relates to the display technique field, particularly a kind of pixel-driving circuit and display device.
Background technology
Traditional Thin Film Transistor (TFT) liquid crystal display (TFT-LCD) normal operation delegation's point counter-rotating (1line dot inversion), the counter-rotating of 2 row points (2line dot inversion) or 1+2line dot inversion, the output adjacency channel (channel) of general source electrode drive circuit (Source Driver IC) is opposed polarity, for example: channel C h1 is positive polarity, then channel C h2 is that negative polarity, channel C h3 are positive polarity, by that analogy, the counter-rotating of recycling polarity (POL) control data line.When Source Driver IC output channel (meaning forwards negative polarity to or forwards positive polarity to from negative polarity from positive polarity) when doing reversal of poles, it is power consumption.Can use at present an electric charge to share (Charge sharing) function, when Source IC reversal of poles, have a bit of time with adjacent two channel short circuits, then the current potential of this two channel can be neutralized to the center level, this two channel can recover normal operation once again afterwards, then this two channel only needs so can reach electricity-saving function from center level climb positive polarity or negative polarity.But when inversion mode reversed (column inversion) for row, a frame of data line (S-line) (Frame) that connects source electrode just can reverse once, and this moment, the effect of Charge sharing can be had a greatly reduced quality, and did not reach good power saving effect.
As shown in Figure 1, tradition can with SW1, SW2 open circuit, with the SW3 short circuit, then with SW1, SW2 short circuit, be opened a way SW3 after Charg sharing finishes when making Charg sharing.Under the situation of Column inversion, when horizontal signal changes, voltage all is in conversion between same polarity, voltage waveform is shown in Fig. 2 left side, and the change in voltage span is h1, if use the mode of traditional charg sharing with adjacent 2channel short circuit this moment, then can cause voltage all to begin charging from the center level, shown in Fig. 2 the right, the change in voltage span is h2, and h2 is greater than h1.Therefore for the practice meeting of this kind of colume inversion so that charging voltage is larger, cause on the contrary minus effect, that is more power consumption.
The utility model content
The technical matters that (one) will solve
The technical problems to be solved in the utility model is: how to make the electric charge shared mechanism realize better power saving effect when the row counter-rotating.
(2) technical scheme
For solving the problems of the technologies described above, the utility model provides a kind of pixel-driving circuit, comprise: electric charge is shared control line and many signal wires that drive pixel, in the signal wire of described driving pixel, one group in twos of the signal wire of identical polar, be provided with short circuiting switch between two signal wires in the group, described short circuiting switch connects described electric charge and shares control line, is used for being communicated with under the control of the shared control line of described electric charge or disconnecting same group two signal line.
Wherein, in the signal wire of identical polar, two adjacent signal line are one group.
Wherein, described short circuiting switch is MOS transistor, and the grid of described MOS transistor connects described electric charge and shares control line, and source electrode connects respectively two signal line in same group with being connected.
Wherein, described short circuiting switch is thin film transistor (TFT), and the grid of described thin film transistor (TFT) connects described electric charge and shares control line, and source electrode connects respectively two signal line in same group with being connected.
The utility model also provides a kind of display device, comprises above-mentioned each described pixel-driving circuit.
(3) beneficial effect
Pixel-driving circuit of the present utility model links together two signal wires of identical polar by short circuiting switch, share the stage at electric charge, the voltage neutralization is the mean value of two line voltage signals, like this in the charging stage, two signal wires are easy to reach due voltage from this mean value, thereby reach the effect of power saving.
Description of drawings
Fig. 1 is the signal wire short circuit connection diagram of a kind of pixel-driving circuit in the prior art;
Fig. 2 is the voltage oscillogram of pixel-driving circuit when reversal of poles among Fig. 1;
Fig. 3 is the signal wire short circuit connection diagram of a kind of pixel-driving circuit of the utility model embodiment;
Fig. 4 is the voltage oscillogram of pixel-driving circuit when reversal of poles among Fig. 3.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
The pixel-driving circuit of the present embodiment comprises that electric charge shares the signal wire of control line and some driving pixels, as shown in Figure 3, is the signal wire short circuit connection diagram (not shown electric charge is shared control line) of the pixel-driving circuit of the present embodiment.Pixel-driving circuit comprises that every signal line is provided with the switch of a not gate and a control driving voltage process data line incoming pixel electrode, four signal line CHn, CHm, CHn+2 and CHm+2 have been shown among Fig. 3, and this four signal line is provided with a not gate and switch SW 1, SW2, SW3 and SW4 separately.
In the situation that row counter-rotating, voltage all is conversion between same polarity, electric charge in reversal of poles is shared the stage, for fear of the situation shown in Fig. 2 the right, in the present embodiment, take two signal line of identical polar as one group, in group, between two signal wires short circuiting switch is set, be used for sharing under the control of control line connection or disconnecting two groups of signal wires at electric charge.Between two signal line CHn of identical polar and CHn+2, be provided with short circuiting switch SW5 among Fig. 3, between two signal line CHm of identical polar and CHm+2, be provided with short circuiting switch SW6.
Short circuiting switch can be MOS transistor, and the grid of MOS transistor connects electric charge and shares control line, and source electrode connects respectively two signal line in same group with being connected.Short circuiting switch can be thin film transistor (TFT) TFT, and the grid of TFT connects electric charge and shares control line, and source electrode connects respectively two signal line in same group with being connected.
Preferably, in order to make things convenient for the making of short circuiting switch between the pixel-driving circuit signal wire, in the signal wire of identical polar, select two adjacent signal line, namely between two nearest signal line short circuiting switch is set.In Fig. 3, take the present Source driver IC design that is opposed polarities as adjacent two signal line, be exactly with n and n+2 signal line (n=1,5,9 ...), and m and m+2 signal line (m=2,6,10 ...) short circuit makes electric charge and share, when electric charge is shared, SW1, SW2, SW3, SW4 are opened a way, then with SW1, SW2, SW3, SW4 short circuit, SW5, SW6 opened a way after SW5, SW6 short circuit, electric charge were shared and finished.So can improve conventional charge and be shared in shortcoming under the row reversing mode, and still can reach the effect of power saving.As shown in Figure 4, do not share (left figure) if do not do electric charge, (V2-〉 V1 when the conversion of CHn current potential then), OP need do work by V2-V1 (CHn+2, CHm, the rest may be inferred for CHm+2), when being used as electric charge and sharing, CHn, the CHn+2 short circuit, CHm, the CHm+2 short circuit, then shadow region (being that electric charge is shared the stage) is by CHn among the right figure, after CHn+2 makes electric charge and shares, current potential is neutralized to CHn, ((V1+V2)/2, the center of CHn+2, (V3+V4)/2), and then by separately operational amplifier (Operational amplifier, OP) allow current potential reach the current potential that should put in place separately current potential output, be the OP of CHn only need do work (V1+V2)/2-V2(all the other the rest may be inferred), the OP of CHm only need do work (V3+V4)/2-V4, so just can reach power saving effect.
A kind of display device is provided in the present embodiment, has comprised above-mentioned pixel-driving circuit.Described display device can be any product or parts with Presentation Function such as liquid crystal panel, Electronic Paper, oled panel, LCD TV, liquid crystal display, digital album (digital photo frame), mobile phone, panel computer.
Owing to having adopted above-mentioned pixel-driving circuit, the display device of the present embodiment has low in energy consumption, the advantage of saves energy.
Above embodiment only is used for explanation the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that do not break away from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (5)
1. pixel-driving circuit, comprise: electric charge is shared control line and many signal wires that drive pixel, it is characterized in that, in the signal wire of described driving pixel, one group in twos of the signal wire of identical polar, be provided with short circuiting switch between two signal wires in the group, described short circuiting switch connects described electric charge and shares control line, is used for being communicated with under the control of the shared control line of described electric charge or disconnecting same group two signal line.
2. pixel-driving circuit as claimed in claim 1 is characterized in that, in the signal wire of identical polar, two adjacent signal line are one group.
3. pixel-driving circuit as claimed in claim 1 or 2 is characterized in that, described short circuiting switch is MOS transistor, and the grid of described MOS transistor connects described electric charge and shares control line, and source electrode connects respectively two signal line in same group with being connected.
4. pixel-driving circuit as claimed in claim 1 or 2 is characterized in that, described short circuiting switch is thin film transistor (TFT), and the grid of described thin film transistor (TFT) connects described electric charge and shares control line, and source electrode connects respectively two signal line in same group with being connected.
5. a display device is characterized in that, comprises such as each described pixel-driving circuit in the claim 1 ~ 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359569 CN202650503U (en) | 2012-07-23 | 2012-07-23 | Pixel drive circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359569 CN202650503U (en) | 2012-07-23 | 2012-07-23 | Pixel drive circuit and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202650503U true CN202650503U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220359569 Expired - Lifetime CN202650503U (en) | 2012-07-23 | 2012-07-23 | Pixel drive circuit and display device |
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| CN (1) | CN202650503U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI556219B (en) * | 2015-06-24 | 2016-11-01 | 奇景光電股份有限公司 | Charge sharing apparatus and method for display panel |
| CN106205529A (en) * | 2016-07-20 | 2016-12-07 | 北京集创北方科技股份有限公司 | Electric charge sharing method and device |
| CN106324929A (en) * | 2015-07-01 | 2017-01-11 | 奇景光电股份有限公司 | Electric charge sharing device and method of display panel |
| CN109196576A (en) * | 2016-06-01 | 2019-01-11 | 夏普株式会社 | Video signal line driving circuit and have its display device and video signal cable driving method |
-
2012
- 2012-07-23 CN CN 201220359569 patent/CN202650503U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI556219B (en) * | 2015-06-24 | 2016-11-01 | 奇景光電股份有限公司 | Charge sharing apparatus and method for display panel |
| CN106324929A (en) * | 2015-07-01 | 2017-01-11 | 奇景光电股份有限公司 | Electric charge sharing device and method of display panel |
| CN109196576A (en) * | 2016-06-01 | 2019-01-11 | 夏普株式会社 | Video signal line driving circuit and have its display device and video signal cable driving method |
| CN106205529A (en) * | 2016-07-20 | 2016-12-07 | 北京集创北方科技股份有限公司 | Electric charge sharing method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |