CN103514842A

CN103514842A - Image display

Info

Publication number: CN103514842A
Application number: CN201210214515.2A
Authority: CN
Inventors: 吴昭呈; 王凌澐
Original assignee: Himax Technologies Ltd
Current assignee: Himax Technologies Ltd
Priority date: 2012-06-26
Filing date: 2012-06-26
Publication date: 2014-01-15
Anticipated expiration: 2032-06-26
Also published as: CN103514842B

Abstract

The invention relates to an image display comprising a gate driver, a source driver, a display panel and a time sequence controller. The time sequence controller detects whether image frame data have a feature pattern so as to decide whether to carry out pre-charging and pre-discharging or not. The feature pattern includes at least one pixel pair that is formed by an upper pixel and a lower pixel, wherein the upper pixel and the lower pixel are adjacent to each other; and a gray-scale value of one pixel is larger than a preset first critical value and a gray-scale value of the other pixel is less than a preset second critical value.

Description

Image display

Technical field

The present invention relates to a kind of image display, particularly about a kind of capable of dynamic, adjust the source electrode driver discharging and recharging.

Background technology

Flat-panel screens (for example liquid crystal display) is generally used in electronic installation and usings as the use that shows output.Due in the middle of the resolution of display increasing always, the consumption of power is also and then increased.For electronic apparatus, in battery capacity, cannot follow under the situation significantly increasing, the increase of power consumption not only can reduce the endurance of electronic apparatus battery, shortens the start duration of electronic apparatus, and also can increase the problem of heat radiation.

Fig. 1 shows that conventional liquid crystal is under the operation of row reversion (column inversion) pattern, the voltage waveform that source electrode driver discharges and recharges capacitor.Under this kind of operator scheme, the output of source electrode driver just, for high voltage V2 and low-voltage V1 intermesh, causes frequently and discharges and recharges, thereby consumes a large amount of and meaningless power supply.As shown in Figure 1, the electric capacity of the first row (line1) charges to another magnitude of voltage V2 from magnitude of voltage V1, and the consumption of power can be expressed as follows:

(2*VCI)(C*(VCI-V1)/T)+(2*VCI)(C*(V2-VCI)/T)

In view of often there is the excessive situation of power consumption in conventional liquid crystal under general operation pattern, therefore, need the charge-discharge mechanism that proposes a kind of novel image display badly, in order to solve aforementioned power, consume excessive problem.

Summary of the invention

In view of above-mentioned, one of object of the embodiment of the present invention is to propose a kind of image display, and its capable of dynamic is adjusted discharging and recharging of source electrode driver, in order to fall lower powered consumption, thereby reaches the object of power saving.

According to the embodiment of the present invention, image display comprises gate drivers, source electrode driver, display panel and time schedule controller.Display panel comprises a plurality of pixels that are arranged in matrix form, and each pixel should have a pixel switch mutually.Wherein these pixel switches of same row link together by a controlling grid scan line, and be controlled by the scan control signal of gate drivers, in order to open or to close the pixel of these row, and these pixel switches with a line link together by one source pole data line, and be controlled by source electrode driver, in order to receive and to show data from source electrode driver.Time schedule controller receives image frame data, and controls the sequential of source electrode driver and gate drivers.Wherein, whether time schedule controller detected image frame data have Eigen Structure, determine according to this whether discharge and recharge in advance.Above-mentioned Eigen Structure comprises at least one pixel pair, and it is comprised of neighbouring pixel, and wherein the GTG value of a pixel is greater than the first default critical value, and the GTG value of another pixel is less than the second default critical value, and the first critical value is greater than the second critical value.

Accompanying drawing explanation

Fig. 1 shows that conventional liquid crystal is under the operation of row reversing mode, the voltage waveform that source electrode driver discharges and recharges capacitor.

Fig. 2 A shows the calcspar of the image display of the embodiment of the present invention.

Fig. 2 B shows the parts of fine portion calcspar of the image display of Fig. 2 A.

Fig. 3 A to Fig. 3 C illustration Eigen Structure.

The detection of the image frame data of Fig. 4 illustration the present embodiment.

The voltage waveform discharging and recharging of Fig. 5 view similar.

[main element symbol description]

100 image displays

11 display panels

12 source electrode drivers

121 change-over switches

122 generally charge and discharge electrical equipment

123 preliminary filling dischargers

13 gate drivers

14 time schedule controllers

14 1 detecting units

41 ~ 43 pixels pair

Embodiment

Fig. 2 A shows the calcspar of the image display 100 of the embodiment of the present invention, and it is applicable to liquid crystal display, but is not limited to this.In addition, though the present embodiment be take row reversion (column inversion) operator scheme, be example, yet the present embodiment equally applicable to other operator schemes, (dot inversion) pattern of for example reversing.

In the present embodiment, image display 100 mainly comprises display panel 11, source electrode driver 12, gate drivers 13 and time schedule controller 14.Wherein, display panel 11(is liquid crystal panel for example) comprise a plurality of pixels that are arranged in matrix form, and each pixel should have a pixel switch mutually, for example thin film transistor (TFT) (thin film transistor, TFT).The grid of the thin film transistor (TFT) of same row links together by a controlling grid scan line, and is controlled by the scan control signal of gate drivers 13, in order to open or to close the pixel of these row.Source electrode with the thin film transistor (TFT) of a line links together by one source pole data line, and is controlled by source electrode driver 12, in order to receive (simulation) demonstration data from source electrode driver 12.Time schedule controller 14 receives picture frame (frame) data, and controls the sequential of source electrode driver 12 and gate drivers 13.

Fig. 2 B shows the parts of fine portion calcspar of the image display 100 of Fig. 2 A.In the present embodiment, time schedule controller 14 comprises a detecting unit 141, in order to detect the image frame data of input, whether has Eigen Structure (also can be described as kill pattern).In this manual, so-called " Eigen Structure " refers to a kind of image frame data, and it can cause the excessive situation of power consumption similar to Figure 1.Three kinds of obvious Eigen Structures of Fig. 3 A to Fig. 3 C illustration, a common trait of these Eigen Structures is: in the middle of neighbouring pixel, one of them pixel tool black grey scale value, and another pixel tool white GTG value.In general, in the present embodiment, in the middle of neighbouring pixel, the GTG value of one of them pixel is greater than the first default critical value, and the GTG value of another pixel is less than the second default critical value (wherein the first critical value is greater than the second critical value), claims this image frame data to have Eigen Structure.In one embodiment, above-mentioned the first critical value approaches or equals maximum gray value, and the second critical value approaches or equals minimum gray value.

For fear of detecting unit 141, because carrying out the detection of Eigen Structure, have influence on the bulk velocity of image display 100, therefore in the present embodiment, the image frame data of detecting unit 141 test sections.In one embodiment, multipair (neighbouring) pixel in detecting unit 141 detected image frame data, as illustrated in Fig. 4.Wherein, S1, S2 ... SM represents the demonstration data that source electrode driver 12 is exported, and G1, G2 ... GN represents the scan control signal that gate drivers 13 is exported.That is to say, display panel 11 is comprised of NxM pixel.As illustrated in Fig. 4, detecting unit 141 detects three couple (neighbouring) pixel in the middle of each image frame data, that is pixel is to 41,42 and 43, but is not limited to this.In other embodiments, the number that pixel is right or/and position can dynamically change.

Get back to Fig. 2 B, the detection signal of detecting unit 141 is sent to the change-over switch 121 of source electrode driver 12, select according to this generally to charge and discharge electrical equipment 122 or preliminary filling discharger 123 one of them, in order to the source electrode driver 12(capacitor of its output-stage circuit for example) discharge and recharge, with output display data to display panel 11.Above-mentioned generally charge and discharge electrical equipment 122 and preliminary filling discharger 123 can be implemented with traditional charge-discharge circuit, therefore it will not go into details.

The voltage waveform discharging and recharging of Fig. 5 view similar.Wherein, the electric capacity of the first row (line1) from the first magnitude of voltage V1 in advance (that is, more Zao than normal scan order) charge to an intermediate voltage value VCI, then, (according to normal scanning sequency) recharged to second voltage value V2 by intermediate voltage value VCI.The consumed power discharging and recharging shown in Fig. 5 can be expressed as follows:

(1*VCI)(C*(VCI-V1)/T)+(2*VCI)(C*(V2-VCI)/T)

Compare with the consumed power that tradition shown in Fig. 1 discharges and recharges, learn that lower powered consumption can significantly fall in the present embodiment, thereby reach the object of power saving.

The foregoing is only the preferred embodiments of the present invention, not in order to limit claim of the present invention; All other do not depart from the equivalence completing under the spirit that invention discloses and changes or modify, and all should be included in the claimed scope of claims.

Claims

1. an image display, comprises:

One gate drivers;

One source pole driver;

One display panel, comprise a plurality of pixels that are arranged in matrix form, and each this pixel should have a pixel switch mutually, wherein these pixel switches of same row link together by a controlling grid scan line, and be controlled by the scan control signal of this gate drivers, in order to open or to close the pixel of these row, and link together by one source pole data line with these pixel switches of a line, and be controlled by this source electrode driver, in order to this source electrode driver certainly, receive and show data; And

Time schedule controller, receives image frame data, and controls the sequential of this source electrode driver and this gate drivers;

Wherein this time schedule controller detects this image frame data and whether has Eigen Structure, determines according to this whether discharge and recharge in advance.

2. image display as claimed in claim 1, wherein this display panel comprises a liquid crystal panel.

3. image display as claimed in claim 1, wherein this display panel operates in row reversion (column inversion) pattern.

4. image display as claimed in claim 1, wherein this pixel switch comprises a thin film transistor (TFT) (TFT).

5. image display as claimed in claim 4, wherein the grid of these thin film transistor (TFT)s of same row links together by this controlling grid scan line, and links together by this source electrode data line with the source electrode of these thin film transistor (TFT)s of a line.

6. image display as claimed in claim 1, wherein this Eigen Structure comprises at least one pixel pair, it is comprised of neighbouring pixel, wherein the GTG value of a pixel is greater than the first default critical value, and the GTG value of another pixel is less than the second default critical value, and this first critical value is greater than this second critical value.

7. image display as claimed in claim 6, wherein this first critical value approaches or equals maximum gray value, and this second critical value approaches or equals minimum gray value.

8. image display as claimed in claim 7, the pixel pair of this Eigen Structure wherein, one of them pixel tool black grey scale value, and another pixel tool white GTG value.

9. image display as claimed in claim 6, the number that wherein pixel of this Eigen Structure is right or/and position capable of dynamic change.

10. image display as claimed in claim 1, wherein this time schedule controller comprises a detecting unit, in order to detect this image frame data, whether has Eigen Structure.

11. image displays as claimed in claim 10, wherein this source electrode driver comprises:

One change-over switch, it receives the detection signal that this detecting unit produces after detected characteristics pattern; And

Generally charge and discharge electrical equipment and preliminary filling discharger, wherein this detection signal select this generally charge and discharge electrical equipment and this preliminary filling discharger both one of, in order to this source electrode driver is discharged and recharged, to export these demonstration data to this display panel.

12. image displays as claimed in claim 11, wherein this generally charges and discharge electrical equipment or this preliminary filling discharger discharges and recharges the capacitor of the output-stage circuit of this source electrode driver.