TWI790256B - Low power driving system and timing controller for display apparatus - Google Patents

Abstract

The present invention discloses a low power driving system and timing controller for a display apparatus. The low power driving system may include: a timing controller configured to divide a display pattern into a static pattern and a dynamic pattern based on a difference between previous line data and current line data, and transmit a packet into which one of first option information corresponding to the static pattern and second option information corresponding to the dynamic pattern is applied; and a source driver configured to receive the packet, and perform a low power mode corresponding to the static pattern according to the first option information or perform an adaptive charge sharing corresponding to the dynamic pattern according to the second option information.

Description

Low Power Drive System and Timing Controller for Display Devices

The present invention relates to a low-power drive technology, and more particularly, to a low-power drive system and timing controller for a display device.

A display device includes a timing controller, a source driver, and a display panel. The timing controller can be designed to provide display data, control data and clock as packets to the source drivers. The source driver receives display data and provides source signals corresponding to the display data to the display panel. The display panel displays a screen corresponding to the source signal.

Display devices require techniques for reducing power consumption of various elements. In particular, various attempts have been made to reduce power consumption in terms of timing controllers and source drivers.

Various embodiments relate to a low-power driving system and timing controller for a display device that can identify a display type and transmit option information including information about the identified display type to a source driver, thereby reducing power consumption of the source driver.

In addition, various embodiments are directed to a low power driving system for a display device, which may provide a packet containing option information for reducing power consumption in response to a display type, and output an output according to the option information Charge sharing control is performed, or current control is performed on one or more of the output buffer, the gamma buffer, and the intermediate drive voltage buffer, thereby reducing power consumption.

In an embodiment, a low power driving system for a display device may include: a timing controller configured to switch a display mode based on a difference between previous line data and current line data Divide into a static type and a dynamic type, and transmit a packet in which one of the first option information corresponding to the static type and the second option information corresponding to the dynamic type is applied and a source driver configured to receive the packet, and execute a low power mode corresponding to the static type according to the first option information, or execute a low power mode corresponding to the dynamic type according to the second option information Adjustable charge sharing.

In another embodiment, a timing controller for a display device may include: a pixel value storage unit configured to store previous row and column data and current row and column data, and provide the previous row and column data and the current row data for use In mapping; an operation unit configured to: calculate a power gain and a power loss caused by charge sharing on the current line data according to a comparison result between the previous line data and the current line data, or calculating a first maximum change in source driver output with charge sharing applied to the current row and column data, and calculating a second maximum change in source driver output if charge sharing is not applied to the current row and column data change; and an option providing unit configured to: when a display type is a dynamic type, by referring to whether charge sharing is applied to the previous row and column data and a comparison between the power gain and the power loss The result provides information on the second option of whether to apply charge sharing to the current line of data, and when the display type is a static type, provides the first maximum change selected according to whether charge sharing was applied to the previous line of data And one of the second largest changes is used as the first option information.

10‧‧‧Sequence Controller

11‧‧‧Data receiving unit

12‧‧‧packet formation unit

13‧‧‧packet output unit

15‧‧‧Option Information Formation Unit

16‧‧‧pixel value storage unit

17‧‧‧operation unit

18‧‧‧Option Information Provider

20‧‧‧Source Driver

30‧‧‧display panel

CH1~CH6‧‧‧channel

Du‧‧‧virtual pixel

HVDD‧‧‧Intermediate drive voltage

Lpeak_cs‧‧‧First largest change

Lpeak_ncs‧‧‧Second largest change

N Line‧‧‧current line information

N-1 Line‧‧‧previous line information

PKT‧‧‧packet

Ps‧‧‧power gain

Pw‧‧‧power loss

PWRC‧‧‧First option information

PWRCcs, PWRCncs‧‧‧Control Options

S10, S20, S22, S23‧‧‧steps

Steps S30, S32, S34, S36, S38, S40, S42, S44‧‧‧

S70, S72, S74, S76, S78, S80, S82, S84‧‧‧Steps

Sout‧‧‧source signal

V _{CS_VH} ‧‧‧Charge sharing voltage for high output buffer

V _{CS_VL} ‧‧‧Low output buffer charge sharing voltage

VDD‧‧‧Drive Voltage

VH‧‧‧High Output Buffer

VL‧‧‧Low Output Buffer

VSS‧‧‧Ground voltage

1 is a block diagram illustrating a low-power driving system for a display device according to an embodiment of the present invention; FIG. 2 is a flow chart illustrating a low-power driving method according to the embodiment of FIG. 1; FIG. A block diagram of a timing controller; FIG. 4 is a flowchart illustrating the operation of an adjustable charge sharing control; FIGS. 5 and 6 illustrate a panel structure; FIG. 7 is a block diagram for describing special charge sharing applied to the present invention; FIG. 8 and 9 is a waveform diagram for describing power saving and power consumption through charge sharing; FIG. 10 is a flow chart for explaining low power mode control operation; FIG. 11 is for describing low power mode according to the output level of the source driver a waveform diagram of the control operation; and FIG. 12 is a schematic diagram illustrating the slope of the output change of the source driver corresponding to the option information with respect to time.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Terms used in this specification and claims are not limited to typical dictionary definitions, but must be interpreted as meanings and concepts consistent with the technical idea of the present invention.

The embodiments described in this specification and the configurations shown in the drawings are preferred embodiments of the present invention, and do not represent the overall technical concept of the present invention. Therefore, various equivalents and modifications capable of replacing the embodiments and configurations may be provided at the point of filing this application.

FIG. 1 illustrates a low power driving system for a display device according to an embodiment of the present invention.

Referring to FIG. 1 , the low power driving system includes a timing controller 10 , a source driver 20 , and a display panel 30 .

The timing controller 10 uses display data received from the outside to generate a packet PKT, and provides the packet PKT to the source driver 20 .

The packet PKT generated by the timing controller 10 may include display data and control data, and the control data may include various parts of option information for distinguishing power control modes.

The power control modes can be divided into low power mode control operation and adaptive charge sharing control operation. The option information can represent low power mode control or adaptive charge sharing control, and has a value based on a default agreement. Additionally, option information can be included in the control data and thus applied to the packet PKT.

The source driver 20 can receive the packet PKT from the timing controller 10 and output the source signal Sout corresponding to the display data to the display panel 30 . The source driver 20 may be configured to execute a power control mode corresponding to the option information of the control data during the process of converting the display data into the source signal Sout and outputting the source signal Sout.

The source driver 20 may include a latch, a shift register, an analog-to-digital converter and an output buffer to convert display data. The source driver 20 may further include: a gamma buffer for supplying the gamma voltage to the analog-to-digital converter; and an intermediate driving voltage (HVDD) buffer for supplying the driving voltage to the output buffer.

Since latches, shift registers, analog-to-digital converters, output buffers, gamma buffers, and intermediate drive voltage buffers are elements commonly used in the source driver 20, detailed descriptions thereof are omitted herein. and description.

The display panel 30 may be implemented as a flat display panel. For example, a display panel including pixels using organic light emitting diodes (OLEDs) or light emitting diodes (LEDs), or a liquid crystal panel (LCD) may be used as the display panel 30 .

In the configuration of FIG. 1 , the low power driving system for a display device according to an embodiment of the present invention includes a timing controller 10 and a source driver 20 .

The operation of the low power driving system for the display device will be described with reference to FIG. 2 .

Firstly, the timing controller 10 divides the display type into a static type and a dynamic type based on the difference between the previous line data and the current line data, and transmits a packet PKT, in which the static type is applied. One of the corresponding first option information and the second option information corresponding to the dynamic type.

The timing controller 10 executes a control program, and the control program may include step S10 , which executes type identification, and provides a packet PKT containing control data including the first option information or the second option information based on the type identification.

The source driver 20 can receive the packet PKT, and identify the power control mode according to the first option information or the second option information. More specifically, the source driver 20 performs a low power mode operation corresponding to the static information according to the first option information, or performs an adjustable charge sharing operation corresponding to the dynamic type according to the second option information.

That is, the source driver 20 executes a driver program according to the power control mode identification, and the driver program includes: Step S20, identify the power control mode according to the display type; Power mode operation; and Step S23 , when the display type is dynamic type, perform an adjustable charge sharing operation.

By comparing the operation of the previous row data and the current row data, the display type can be judged as one of static type and dynamic type.

At this time, the judgment standard for distinguishing between the static type and the dynamic type can be set as the data change between the previous row data and the current row data, and is used to judge the difference between the static type and the static type. The reference value of the data change is set to various values according to the designer's intention.

The static state may mean that the source signal Sout corresponding to the output of the source driver 20 is continuously maintained because the data change between the previous column data and the current column data is small.

The dynamic type can mean that the source signal Sout corresponding to the output of the source driver 20 is floating because the data changes greatly between the previous column data and the current column data.

In this embodiment, when the display type is the static type, the timing controller 10 provides the first option information for judging that the power control mode is a low power mode control operation, and the source driver 20 executes the low power mode to Responsive to the first option information, thereby reducing power consumption by reducing the amount of output current used to maintain the current row and column data.

On the other hand, when the display type is a dynamic type, the timing controller 10 provides the second option information for judging that the power control mode is an adjustable charge sharing operation, and the source driver 20 performs adjustable charge sharing to reduce power Consumed in response to the second operation message. Specifically, the source driver 20 performs charge sharing on the output of the current row and column data, and provides the current discharged from the load capacitor of the display panel to a position requiring current charging, thereby reducing power consumption.

The timing controller 10 can provide the packet PKT of the first option information or the second option information included in the control data, so as to reduce the power consumption of the source driver 20 . Due to the above operations, the timing controller 10 can be configured as shown in FIG. 3 . The second option information can be determined and provided through the adaptive charge sharing control operation of FIG. 4 , and the first option information can be determined and provided through the low power mode control operation of FIG. 10 . The adjustable charge sharing control operation of FIG. 4 and the low power mode control operation of FIG. 10 may be included in the step of performing type identification and providing a packet PKT containing control data including the first option information or the second option information based on the type identification. S10.

Referring to FIG. 3 , the timing controller 10 includes a data receiving unit 11 , a packet forming unit 12 , a packet output unit 13 , and an option information forming unit 15 .

The data receiving unit 11 transmits the display data received from the outside to the packet forming unit 12 . The packet forming unit 12 provides the display data, control data and clock for forming the packet PKT to the packet output unit 13 as parallel data. The packet output unit 13 converts the parallel data into serial data according to a predetermined protocol, and sends the serial data as a packet PKT to the source driver 20 .

In the above configuration, the packet forming unit 12 receives the first option information or the second option information from the option information forming unit 15, and includes the first option information or the second information in the control data.

The option information forming unit 15 compares the previous row data and the current row data, and provides the first option information or the second option information as the comparison result. For this operation, the option information forming unit 15 includes a pixel value storage unit 16 , an operation unit 17 , and an option information providing unit 18 .

The pixel value storage unit 16 may include a memory for storing display data on a row-column basis, and the display data is transmitted from the data receiving unit 11 to the packet forming unit 12 . The pixel value storage unit 16 may have the ability to store at least the previous row and column data and the current row and column data and provide data for mapping at the same time. The pixel value storage unit 16 may perform an operation of storing display data on a row-column basis and an operation of providing previous row-column data and current row-column data for mapping in synchronization with the control and operation of the option information providing unit 18 .

The operation unit 17 can perform: receiving the previous row and column data and the current row and column data from the pixel value storage unit 16, and mapping the previous row and column data and the current row and column data to calculate the data change between the previous row and column data and the current row and column data; by The operation of judging the display type with reference to the change of the data; the operation of calculating the power gain Ps and the power loss Pw through the charge sharing of the current rank data; the operation of comparing the power gain Ps and the power loss Pw; and when the charge sharing is applied to the current rank data or when The operation of detecting the maximum change Lpeak_cs or Lpeak_ncs of the source driver output when charge sharing is not applied to the current row and column data. The operation unit 17 can perform an operation selected from the operations according to the display type, and provide the operation result to the option information providing unit 18 .

The option information providing unit 18 can control the operation unit 17 to select an operation to be performed according to the display type, receive the operation result to determine option information corresponding to the display type, and provide the determined option information to the packet forming unit 12 .

That is, the option information forming unit 15 may determine the second option information obtained through the adaptive charge sharing operation of FIG. 4 or the first option information obtained through the low power mode control operation of FIG. 10 ; and the determined second option information The first option information or the second option information is provided to the packet forming unit 12 .

When the display type corresponds to the dynamic type, the adjustable charge sharing operation of FIG. 4 is performed.

The adjustable charge-sharing operation can be briefly summarized as follows. The adaptive charge sharing operation includes: mapping and comparing previous rank data and current rank data; calculating power gain Ps and power loss Pw by charge sharing on current rank data; and by comparing between power gain Ps and power loss Pw Whether the result and charge sharing is applied to the previous row and column data determines whether to apply charge sharing to the current row and column data.

That is, the second option information obtained through the adjustable charge sharing control operation can be understood as information indicating whether to apply charge sharing to the source signal corresponding to the current row and column data.

When the display mode corresponds to the static mode, the low power mode control operation of FIG. 10 is performed.

The low power mode control operation can be briefly summarized as follows. Low power mode control operations include: mapping and comparing previous row and column data with current row and column data; detecting a first maximum change in source driver output with charge sharing applied to the current row and column data; and selecting the first maximum change as the first option level. In addition, the low power mode control operations include: mapping and comparing the previous row and column data with the current row and column data; detecting the second largest change in the source driver output without applying charge sharing to the current row and column data; and selecting the second largest change as the second option level.

Then, according to whether charge sharing is applied to the previous column data, one of the first option level and the second option level is selected to be applied to the packet as the first option information.

The adjustable charge sharing control operation will be described in detail below with reference to FIG. 4 .

First, when the display type is a dynamic type, the timing controller 10 stores the previous row and column data N-1 Line and the current row and column data N Line in the pixel value storage unit 16 to determine whether to apply charge sharing in step S30, And in step S32 , the operation unit 17 maps the previous line data N−1 Line and the current line data N Line to each other.

The display panel 30 includes pixels configured in different forms according to their types. FIG. 5 illustrates the arrangement of pixels of the display panel 30 configured in a normal form, and FIG. 6 illustrates the arrangement of pixels of the display panel 30 configured in a Z-inverted form. In FIGS. 5 and 6 , Rx pixels represent red pixels, Bx pixels represent blue pixels, Gx pixels represent green pixels, and Du pixels represent dummy pixels.

The timing controller 10 may form a packet PKT by classifying display data based on the arrangement of red pixels, blue pixels, and green pixels in rows and columns, and it is different according to the type of the display panel 30 .

Therefore, the timing controller 10 calls information for checking the specification of the display panel 30 to compare the previous line data N-1 Line with the current line data N Line, and executes the method for reordering the previous line data N according to the specification of the display panel 30. The mapping between -1 Line and the current rank data N Line.

Next, the timing controller 10 compares the previous row and column data with the current row and column data through the operation unit 17, and calculates the power gain Ps and the power loss Pw caused by the charge sharing of the current row and column data in step S34. The power gain Ps and the power loss Pw can be calculated by a table previously set in the timing controller 10 .

The source driver 20 according to an embodiment of the present invention may perform charge sharing on all channels through the special charge sharing of FIG. 7 . The source driver 20 has a plurality of channels for outputting the source signal Sout. Special charge sharing means that all channels are divided into a predetermined number of groups, and charge sharing is performed for each group. In FIG. 7, channels for charge sharing can be switched by a plurality of MOS transistors, and the plurality of MOS transistors can be implemented in various ways according to the designer's intention. Therefore, its detailed description is omitted here.

FIG. 7 illustrates that six channels CH1 to CH6 are grouped into a special structure. In this case, among the six channels CH1 to CH6, a high output buffer VH for charge sharing can be connected, and a low output buffer VL for charge sharing can be connected. In special configurations, the charge sharing voltage can be set to a level corresponding to the average value of the connected channels.

Referring to FIGS. 8 and 9 , the channels have polarity and are changed based on an intermediate driving voltage HVDD, and charge sharing is performed while being driven on a row-column basis.

The high output buffer VH can drive an output within the range of the middle driving voltage HVDD and the driving voltage VDD, and the low output buffer VL can drive an output within the range of the ground voltage VSS and the middle driving voltage HVDD. At this time, the intermediate driving voltage HVDD may be set to have a voltage corresponding to a half of a range between the driving voltage VDD and the ground voltage VSS. The charge sharing voltage V _{CS_VH} for the high output buffer VH may be set to a level between the middle driving voltage HVDD and the driving voltage VDD, and the charge sharing voltage V _{CS_VL} for the low output buffer VL may be set as A level between the middle driving voltage HVDD and the ground voltage VSS.

The channels are repeatedly driven and charge-shared in response to changing pixel data on a row-column basis.

While repeating driving and charge sharing, power saving and power consumption can be achieved according to the voltage variation of the channel.

From a power consumption standpoint, a decrease in voltage level may indicate a display panel (ie, load capacitor) discharge. In this case, it can be understood that no power is consumed.

However, when the voltage level rises to the charge sharing level V _{CS_VH} or V _{CS_VL} , it may indicate that charging is performed by the discharge current. In this case, power savings can be achieved. That is, the power savings can be used to calculate the power gain Ps due to charge sharing.

In addition, when the voltage level rises from the charge sharing level V _{CS_VH} or V _{CS_VL} , it may indicate that energy is consumed. In this case, the power consumption can be used to calculate the power loss Pw caused by charge sharing.

The timing controller 10 controls the operation unit 17 to compare the previous row and column data with the current row and column data for all channels connected by special charge sharing, and in step S34, calculate the power gain Ps and the power gain Ps caused by the charge sharing of the current row and column data. Loss Pw.

When calculating the power gain Ps and the power loss Pw, at step S36, the option information providing unit 18 of the timing controller 10 checks whether charge sharing is applied to the previous rank data, and at step S38, checks the power gain through the operation of the operation unit 17. Whether Ps is greater than power loss Pw.

For example, the step S38 of checking whether the power gain Ps is greater than the power loss Pw may include: determining whether the power gain Ps is greater than a preset offset level or greater than the power loss Pw.

When the charge sharing is not applied to the previous row and column data or the power gain Ps is smaller than the power loss Pw, the option information providing unit 18 of the timing controller 10 determines not to apply charge sharing to the current row and column data, and turns off the charge sharing in step S42. In this case, the option information providing unit 18 defines corresponding second option information, and provides the defined second option information to the packet forming unit 12 . Therefore, in step S44, the packet forming unit 12 forms the packet PKT applied with the second option information, which indicates that charge sharing is not applied to the current row and column data.

On the other hand, when the charge sharing is applied to the previous row and column data or the power gain Ps is greater than the power loss Pw, the option information providing unit 18 of the timing controller 10 determines to apply charge sharing to the current row and column data, and turns on the charge sharing in step S40. In this case, the option information providing unit 18 defines corresponding second option information, and provides the defined second option information to the packet forming unit 12 . Therefore, in step S44, the packet forming unit 12 forms the packet PKT with the second option information applied, and the second option information indicates that the charge sharing is applied to the current column data.

When the display type is a dynamic type, the timing controller 10 can generate the second option information about whether to apply charge sharing to the source signal corresponding to the current row and column data through the adjustable charge sharing control program in FIG. 4 , and will include The packet PKT with the second option information is provided to the source driver 20 .

Source driver 20 may perform adaptive charge sharing on the source signal to reduce power consumption in response to a second option message indicating that charge sharing is applied, or output the source signal normally without adaptive charge sharing in response to No second option information for charge sharing is applied.

The low power mode control operation will be described in detail below with reference to FIG. 10 .

When the display type is the static type, the timing controller 10 may control the amount of current output by the source driver 20 to perform a low power mode control operation for reducing power consumption as shown in FIG. 10 .

When the display type is a static type, the timing controller 10 executes a low power mode control procedure, which is to check the output variation of the source driver 20 relative to the current row and column data, and determine the first option information suitable for the maximum variation.

Referring to FIG. 11, the first option information may be represented by PwRC, and changed to 'HHH', 'LHH' or 'LLL'.

The first option information can be configured to control the amount of current within a range that can maintain the output of the source driver 20 in response to the row-column data of the static type.

As shown in FIG. 12 , the first option information may be included within a range satisfying the minimum level and time required for driving the screen, and set based on row and column data to reduce the amount of current. That is, the first option information can be determined in response to the current row and column data to reduce the current amount within the range of maintaining the output voltage in response to the previous row and column data.

For this configuration, the timing controller 10 compares the previous row and column data stored in the pixel value storage unit 16 with the current row and column data through the operation unit 17 .

The operation unit 17 of the timing controller 10 compares the previous row and column data with the current row and column data, and detects the first maximum change Lpeak_cs of the output of the source driver 20 as an absolute value when charge sharing is applied to the current row and column data. In addition, the operation unit 17 compares the previous row and column data with the current row and column data, and in step S74, detects the second maximum change Lpeak_ncs of the output of the source driver 20 as an absolute value under the condition that charge sharing is not applied to the current row and column data . At this time, the first maximum variation Lpeak_cs and the second maximum variation Lpeak_ncs may be stored as a maximum value among values of all channels connected through special charge sharing.

The operating unit 17 of the timing controller 10 selects the first maximum change Lpeak_cs and the second maximum change Lpeak_ncs as the first option level and the second option level respectively, and determines the corresponding first option level and the second option level in step S76. Level control options PWRCcs and PWRCncs.

Next, in step S78, the option information providing unit 18 of the timing controller 10 checks whether charge sharing is applied to the previous column data.

When charge sharing is applied to the previous row and column data, the option information providing unit 18 of the timing controller 10 may select the control option PWRCcs as the first option information PWRC in step S80, and provide the first option information PWRC to the packet forming unit 12, and The packet PKT can be formed by applying the first option information PWRC in step S84. On the other hand, when charge sharing is not applied to the previous row and column data, the option information providing unit 18 of the timing controller 10 may select the control option PWRCncs as the first option information PWRC in step S82, and provide the first option information PWRC to the packet forming Unit 12, and the packet PKT can be formed by applying the first option information PWRC in step S84.

Through the low power mode control operation, when the display type is the static type, the timing controller 10 performs control for reducing power consumption by controlling the amount of current used for the output of the source driver 20 .

The timing controller 10 can reduce the power consumption of the source driver 20 while performing the adaptive charge sharing control operation of FIG. 4 and the low power mode control operation of FIG. 10 based on the row and column data.

The timing controller 10 can execute the above-mentioned low power mode control program through the output buffer, the gamma buffer and the intermediate driving voltage buffer, and generate individual signals for controlling the output buffer, the gamma buffer and the intermediate driving voltage buffer. option information, and applying the option information to the packet PKT.

Therefore, the source driver 20 can control the output buffer, the gamma buffer and the intermediate driving voltage buffer in response to the option information of individual parts, thereby reducing the overall current consumption.

Through the above configuration and operation, the timing controller 10 can identify the display type, and transmit the option information corresponding to the identified display type to the source driver 20 , thereby reducing the power consumption of the source driver 20 .

In addition, according to the display type corresponding to the option information, the timing controller 10 can perform charge sharing control on the output of the source driver 20, or on one or more output buffers, gamma buffers and intermediate driving voltage buffers Current control is performed, thereby reducing power consumption.

While various embodiments have been described above, those of ordinary skill in the art will understand that the described embodiments are by way of illustration only. Therefore, the scope of the present description should not be limited based on the described embodiments.

10‧‧‧Sequence controller

20‧‧‧Source Driver

30‧‧‧display panel

PKT‧‧‧packet

Sout‧‧‧source signal

Claims (15)

A low power driving system for a display device, comprising: a timing controller configured to divide a display mode into a static mode and a dynamic mode based on a difference between previous row data and current row data type, and delivering a packet in which one of the first option information corresponding to the static type and the second option information corresponding to the dynamic type is applied; and a source driver configured to receive the packet, and execute a low power mode corresponding to the static type according to the first option information, or execute an adjustable charge sharing corresponding to the dynamic type according to the second option information, wherein the timing the controller controls the adjustable charge sharing of the source driver by providing the second option information to the source driver through the packet in response to a comparison result between the previous row data and the current row data, The second option information indicates whether to apply charge sharing to the current row data. According to the low-power driving system described in claim 1, wherein the timing controller calculates the result of charge sharing on the current line data based on the comparison result between the previous line data and the current line data and a power gain and a power loss, and provide information on whether charge sharing is applied to the current rank data by referring to whether charge sharing was applied to the previous rank data and a comparison result between the power gain and the power loss The second option information. According to the low power drive system described in claim 2, wherein the timing controller is provided for turning off the current rank data when charge sharing is not applied to the previous rank data or the power gain is less than the power loss and providing the second option information for enabling charge sharing on the current rank data when charge sharing is applied to the previous rank data and the power gain is greater than the power loss. According to the low-power driving system described in claim 2, the timing controller compares the previous column data and the current column data for all channels of the source driver connected through special charge sharing , calculating the power gain and the power loss caused by the charge sharing on the current rank data. According to the low-power driving system described in claim 2, wherein the source driver performs the adjustable charge sharing according to the second option information to selectively perform a source signal on the current row and column data charge sharing. According to the low-power driving system described in claim 1, wherein the timing controller calculates a first maximum change of the source driver output under the condition that charge sharing is applied to the current row and column data, and in charge calculating a second maximum change in the source driver output in response to the comparison between the previous row and column data and the current row data in the event that sharing is not applied to the current row and column data, and providing a basis for whether charge One of the first maximum change and the second maximum change selected for the previous rank data is shared as the first option information. According to the low-power driving system described in claim 6, the timing controller provides the first maximum change as the first option information when charge sharing is applied to the previous row and column data, and the timing controller provides the first maximum change as the first option information when charge sharing is not applied When applied to the previous row data, the second largest change is provided as the second option information. The low power driving system according to claim 6, wherein the timing controller stores a maximum value among the values of all the channels connected by special charge sharing as the first maximum variation and the Second largest change. According to the low power driving system described in claim 6, wherein the source driver executes the low power based on one of the first maximum change and the second maximum change provided as the first option information mode to reduce the amount of current used to maintain the output of the current rank data. According to the low-power drive system described in item 1 of the scope of the patent application, wherein the timing controller provides the first option information, the first option information includes information for distinguishing an output buffer, a gamma buffer, and an intermediate information of driving voltage buffers, and the source driver performing the low power mode on a buffer selected by the first option information, the buffer being the output buffer, the gamma buffer and the intermediate driver One of the voltage buffers. A timing controller for a display device, comprising: a pixel value storage unit configured to store previous row and column data and current row and column data, and provide the previous row and column data and the current row data for mapping; An operation unit configured to: calculate a power gain and a power loss caused by charge sharing on the current row and column data according to a comparison result between the previous row and row data and the current row and row data; or in charge sharing calculating a first maximum change in the source driver output if applied to the current row and column data, and calculating a second maximum change in the source driver output if charge sharing is not applied to the current row and column data; and An option providing unit configured to: when a display type is a dynamic type, provide information about whether charge sharing is applied to the previous row and column data and a comparison result between the power gain and the power loss second option information of whether charge sharing is applied to the current row and column data; and when the display mode is a static mode, providing the first maximum change and the second option selected according to whether charge sharing is applied to the previous row and column data One of the two largest changes as the first option information. According to the timing controller described in claim 11 of the scope of the patent application, it further includes: a packet forming unit configured to form a packet including display data and control data, wherein the packet forming unit takes the first option information Or the second option information is applied to the control data, wherein the first option information is applied in a low power mode to reduce the amount of current used to maintain the current column data output by the source driver, and in a possible The second option information is applied under Adapt Charge Sharing to select charge sharing on the current row and column data. According to the timing controller described in item 11 of the patent scope of the application, wherein, the operation unit selectively executes: a first operation, calculating a data change between the previous row data and the current row data; a second operation operation to calculate the power gain and the power loss caused by charge sharing on the current rank data; a third operation to calculate the power gain and the power loss; and a fourth operation to calculate the power gain and the power loss when charge sharing is applied to the current detecting the first maximum change in the source driver output in the case of row and column data, and detecting the second maximum change in the source driver output in the case of charge sharing not applied to the current row and column data, Wherein, the operating unit sequentially executes the first operation to the third operation to respond to the dynamic pattern, or sequentially executes the first operation and the fourth operation to respond to the static pattern. The timing controller according to claim 11, wherein when the display type is the dynamic type, the option providing unit is not applied to the previous rank data or the power gain is less than the power loss when the charge sharing is not applied. The second option information is provided for disabling charge sharing on the current rank data if charge sharing is applied to the previous rank data and the power gain is greater than the power loss if charge sharing is applied to the current rank data This second option information for charge sharing on the data. According to the timing controller described in claim 11, the option providing unit provides the first maximum change as the first option information when charge sharing applies the previous column data, and the option providing unit provides the first maximum change as the first option information when charge sharing does not apply the previous row data. The second largest change is provided as the second option information when row and column data are provided.

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