TWI790256B - Low power driving system and timing controller for display apparatus - Google Patents
Low power driving system and timing controller for display apparatus Download PDFInfo
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- TWI790256B TWI790256B TW107125779A TW107125779A TWI790256B TW I790256 B TWI790256 B TW I790256B TW 107125779 A TW107125779 A TW 107125779A TW 107125779 A TW107125779 A TW 107125779A TW I790256 B TWI790256 B TW I790256B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of El Displays (AREA)
Abstract
Description
本發明涉及一種低功率驅動技術,更具體地,涉及一種用於顯示裝置的低功率驅動系統及時序控制器。 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.
一種顯示裝置包括時序控制器、源極驅動器、以及顯示面板。該時序控制器可被設計以將顯示資料、控制資料和時脈作為封包提供給源極驅動器。源極驅動器接收顯示資料,並將與顯示資料對應的源極訊號提供給顯示面板。顯示面板顯示與源極訊號對應的螢幕。 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.
顯示裝置需要用於降低各種元件功率消耗的技術。尤其,已經進行各種嘗試來降低時序控制器和源極驅動器方面的功率消耗。 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.
各種實施例涉及一種用於顯示設備的低功率驅動系統及時序控制器,其可以識別一顯示型態,並且將包含關於所識別的顯示型態資訊的選項資訊傳送給一源極驅動器,從而減少該源極驅動器的功率消耗。 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.
此外,各種實施例針對一種用於顯示設備的低功率驅動系統,其可提供一封包,該封包包含用於降低功率消耗的選項資訊以響應一顯示型態,並且根據該選項資訊在一輸出上執行電荷共享控制,或者對輸出緩衝器、伽瑪緩衝器和中間驅動電壓緩衝器中的一個或多個執行電流控制,從而降低功率消耗。 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.
在一實施例中,一種用於顯示設備的低功率驅動系統可包括:一時序控制器,被配置以基於在先前行列(line)資料與當前行列資料之間的一差 異,將一顯示型態分為一靜態型態和一動態型態,以及傳遞一封包,在該封包中施加有對應於該靜態型態的第一選項資訊和對應於該動態型態的第二選項資訊的其中之一;以及一源極驅動器,被配置以接收該封包,並根據該第一選項資訊執行對應於該靜態型態的一低功率模式,或者根據該第二選項資訊執行對應於該動態型態的一可調適電荷共享。 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.
在另一實施例中,一種用於顯示設備的時序控制器可包括:一像素值儲存單元,被配置以儲存先前行列資料和當前行列資料,並提供該先前行列資料和該當前行資料以用於映射;一操作單元,被配置以:根據在該先前行列資料與該當前行列資料之間的一比較結果計算由該當前行列資料上的電荷共享所造成的一功率增益和一功率損耗、或者在電荷共享施用於該當前行列資料的情況下計算一源極驅動器輸出的一第一最大變化,以及在電荷共享未施用於該當前行列資料的情況下計算該源極驅動器輸出的一第二最大變化;以及一選項提供單元,被配置以:當一顯示型態是一動態型態時,藉由參考電荷共享是否施用於該先前行列資料和在該功率增益與該功率損耗之間的一比較結果提供關於是否對該當前行列資料施用電荷共享的第二選項資訊,以及當該顯示型態是一靜態型態時,提供根據電荷共享是否施用於該先前行列資料所選擇之該第一最大變化和該第二最大變化的其中之一作為第一選項資訊。 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‧‧‧時序控制器 10‧‧‧Sequence Controller
11‧‧‧資料接收單元 11‧‧‧Data receiving unit
12‧‧‧封包形成單元 12‧‧‧packet formation unit
13‧‧‧封包輸出單元 13‧‧‧packet output unit
15‧‧‧選項資訊形成單元 15‧‧‧Option Information Formation Unit
16‧‧‧像素值儲存單元 16‧‧‧pixel value storage unit
17‧‧‧操作單元 17‧‧‧operation unit
18‧‧‧選項資訊提供單元 18‧‧‧Option Information Provider
20‧‧‧源極驅動器 20‧‧‧Source Driver
30‧‧‧顯示面板 30‧‧‧display panel
CH1~CH6‧‧‧通道 CH1~CH6‧‧‧channel
Du‧‧‧虛擬像素 Du‧‧‧virtual pixel
HVDD‧‧‧中間驅動電壓 HVDD‧‧‧Intermediate drive voltage
Lpeak_cs‧‧‧第一最大變化 Lpeak_cs‧‧‧First largest change
Lpeak_ncs‧‧‧第二最大變化 Lpeak_ncs‧‧‧Second largest change
N Line‧‧‧當前行列資料 N Line‧‧‧current line information
N-1 Line‧‧‧先前行列資料 N-1 Line‧‧‧previous line information
PKT‧‧‧封包 PKT‧‧‧packet
Ps‧‧‧功率增益 Ps‧‧‧power gain
Pw‧‧‧功率損耗 Pw‧‧‧power loss
PWRC‧‧‧第一選項資訊 PWRC‧‧‧First option information
PWRCcs、PWRCncs‧‧‧控制選項 PWRCcs, PWRCncs‧‧‧Control Options
S10、S20、S22、S23‧‧‧步驟 S10, S20, S22, S23‧‧‧steps
S30、S32、S34、S36、S38、S40、S42、S44‧‧‧步驟 Steps S30, S32, S34, S36, S38, S40, S42, S44‧‧‧
S70、S72、S74、S76、S78、S80、S82、S84‧‧‧步驟 S70, S72, S74, S76, S78, S80, S82, S84‧‧‧Steps
Sout‧‧‧源極訊號 Sout‧‧‧source signal
VCS_VH‧‧‧高輸出緩衝器的電荷共享電壓 V CS_VH ‧‧‧Charge sharing voltage for high output buffer
VCS_VL‧‧‧低輸出緩衝器的電荷共享電壓 V CS_VL ‧‧‧Low output buffer charge sharing voltage
VDD‧‧‧驅動電壓 VDD‧‧‧Drive Voltage
VH‧‧‧高輸出緩衝器 VH‧‧‧High Output Buffer
VL‧‧‧低輸出緩衝器 VL‧‧‧Low Output Buffer
VSS‧‧‧接地電壓 VSS‧‧‧Ground voltage
圖1為說明依據本發明一實施例之用於顯示裝置的低功率驅動系統的方塊圖;圖2為說明依據圖1的實施例之低功率驅動方法的流程圖;圖3為說明圖1之時序控制器的方塊圖;圖4為說明可調適電荷共享控制操作的流程圖;圖5和圖6說明面板結構;圖7為用於描述特殊電荷共享施用於本發明的方塊圖;圖8和圖9為用於描述通過電荷共享之功率節省和功率消耗的波形圖;圖10為說明低功率模式控制操作的流程圖; 圖11為用於描述根據源極驅動器的輸出位準之低功率模式控制操作的波形圖;以及圖12為說明對應於選項資訊之源極驅動器的輸出變化斜率相對於時間的示意圖。 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.
在下文中,將參考附圖詳細描述本發明的實施例。本說明書和申請專利範圍中使用的術語不限於典型的字典定義,而必須解釋為與本發明的技術思想一致的含義和概念。 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.
本說明書中描述的實施例和附圖中示出的配置是本發明的較佳實施例,並不代表本發明的整體技術構思。因此,可以在提交本申請案的時間點提供能夠替換實施例和配置的各種等同物和修改。 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.
圖1說明本發明一實施例之用於顯示裝置的低功率驅動系統。 FIG. 1 illustrates a low power driving system for a display device according to an embodiment of the present invention.
參照圖1,低功率驅動系統包括時序控制器10、源極驅動器20、以及顯示面板30。 Referring to FIG. 1 , the low power driving system includes a
時序控制器10使用從外部接收的顯示資料產生封包PKT,並將封包PKT提供給源極驅動器20。 The
由時序控制器10產生的封包PKT可以包括顯示資料和控制資料,並且控制資料可以包括用於區分功率控制模式的選項資訊的各種部分。 The packet PKT generated by the
功率控制模式可以分為低功率模式控制操作和可調適電荷共享控制操作。選項資訊可以表示低功率模式控制或可調適電荷共享控制,並且具有基於預設協定的值。此外,選項資訊可以包含在控制資料中,並因此施加於封包PKT。 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.
源極驅動器20可以從時序控制器10接收封包PKT,並且將與顯示資料相對應的源極訊號Sout輸出到顯示面板30。源極驅動器20可以被配置以在將顯示資料轉換為源極訊號Sout的過程和輸出該源極訊號Sout的過程期間,執行與控制資料的選項資訊對應的功率控制模式。 The
源極驅動器20可以包括鎖存器、移位暫存器、類比至數位轉換器和輸出緩衝器,以轉換顯示資料。源極驅動器20可以進一步包括:伽瑪緩衝 器,用於將伽馬電壓提供到類比至數位轉換器;以及中間驅動電壓(HVDD)緩衝器,用於將驅動電壓提供到輸出緩衝器。 The
由於鎖存器、移位暫存器、類比至數位轉換器、輸出緩衝器、伽瑪緩衝器和中間驅動電壓緩衝器是通常地使用在源極驅動器20中的元件,因此本文省略其詳細說明和描述。 Since latches, shift registers, analog-to-digital converters, output buffers, gamma buffers, and intermediate drive voltage buffers are elements commonly used in the
顯示面板30可以實現為平面顯示面板。例如,包括使用有機發光二極體(OLED)或發光二極體(LED)的像素的顯示面板或者液晶面板(LCD)可以被使用作為顯示面板30。 The
在圖1的配置中,根據本發明實施例之用於顯示裝置的低功率驅動系統包括時序控制器10以及源極驅動器20。 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
將參照圖2描述用於顯示裝置的低功率驅動系統的操作。 The operation of the low power driving system for the display device will be described with reference to FIG. 2 .
首先,時序控制器10基於在先前行列資料與當前行列資料之間的差異,將顯示型態分為靜態型態和動態型態,並傳遞封包PKT,在封包PKT中施加有與該靜態型態對應的第一選項資訊和與該動態型態對應的第二選項資訊的其中之一。 Firstly, the
時序控制器10執行一控制程序,並且該控制程序可以包括步驟S10,其執行型態識別,並基於型態識別提供包含有第一選項資訊或第二選項資訊的控制資料的封包PKT。 The
源極驅動器20可以接收封包PKT,並根據第一選項資訊或第二選項資訊識別功率控制模式。更具體地,源極驅動器20根據第一選項資訊執行對應於靜態資訊的低功率模式操作,或者根據第二選項資訊執行對應於動態型態的可調適電荷共享操作。 The
亦即,源極驅動器20根據功率控制模式識別執行一驅動程序,並且該驅動程序包括:步驟S20,根據顯示型態識別功率控制模式;步驟S22,當顯示型態為靜態型態時,執行低功率模式操作;以及步驟S23,當顯示型態是動態型態時,執行可調適電荷共享操作。 That is, the
通過比較先前行列資料和當前行列資料的操作,顯示型態可以被判斷為靜態型態和動態型態的其中之一。 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.
此時,用於區分靜態型態與動態型態之間的判斷標準可以被設定為在先前行列資料與當前行列資料之間的資料變化,並且用於判斷靜態型態與靜態型態之間的資料變化的參考值根據設計者的意圖設定為各種值。 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.
靜態型態可以代表對應於源極驅動器20的輸出的源極訊號Sout被持續地維持,因為在先前行列資料與當前行列資料之間的資料變化很小。 The static state may mean that the source signal Sout corresponding to the output of the
動態型態可以代表對應於源極驅動器20的輸出的源極訊號Sout是浮動的,因為在先前行列資料與當前行列資料之間的資料變化很大。 The dynamic type can mean that the source signal Sout corresponding to the output of the
在本實施例中,當顯示型態是靜態型態時,時序控制器10提供第一選項資訊,用於判斷功率控制模式為低功率模式控制操作,並且源極驅動器20執行低功率模式,以響應第一選項資訊,藉此藉由減少用於保持當前行列資料的輸出的電流量來降低功率消耗。 In this embodiment, when the display type is the static type, the
另一方面,當顯示型態是動態型態時,時序控制器10提供第二選項資訊,用於判斷功率控制模式為可調適電荷共享操作,並且源極驅動器20執行可調式電荷共享,降低功率消耗,以響應第二操作資訊。具體而言,源極驅動器20對當前行列資料的輸出執行電荷共享,並且將從顯示面板的負載電容器放電的電流提供到需要電流充電的位置,藉此降低功率消耗。 On the other hand, when the display type is a dynamic type, the
時序控制器10可以提供包含在控制資料中之第一選項資訊或第二選項資訊的封包PKT,以降低源極驅動器20的功率消耗。由於上述操作,時序控制器10可以被配置為如圖3所示。第二選項資訊可以通過圖4的可調適電荷共享控制操作而被判定和提供,並且第一選項資訊可以通過圖10的低功率模式控制操作而被判定和提供。圖4的可調適電荷共享控制操作和圖10的低功率模式控制操作可以包含在執行型態識別且基於型態識別提供包含有第一選項資訊或第二選項資訊的控制資料的封包PKT的步驟S10中。 The
參照圖3,時序控制器10包括資料接收單元11、封包形成單元12、封包輸出單元13、以及選項資訊形成單元15。 Referring to FIG. 3 , the
資料接收單元11將從外部接收的顯示資料傳送到封包形成單元12。封包形成單元12將用於形成封包PKT的顯示資料、控制資料和時脈作為並列(parallel)資料提供給封包輸出單元13。封包輸出單元13根據預定協定將並列資料轉換為串列(serial)資料,並將作為封包PKT的串列資料發送到源極驅動器20。 The
在上述配置中,封包形成單元12從選項資訊形成單元15接收第一選項資訊或第二選項資訊,並且包括在控制資料中的第一選項資訊或第二資訊。 In the above configuration, the
選項資訊形成單元15比較先前行列資料和當前行列資料,並提供第一選項資訊或第二選項資訊作為比較結果。對於該操作,選項資訊形成單元15包括像素值儲存單元16、操作單元17、以及選項資訊提供單元18。 The option
像素值儲存單元16可以包括記憶體,用於儲存以行列為基礎的顯示資料,該顯示資料從資料接收單元11傳輸到封包形成單元12。像素值儲存單元16可以具有儲存至少先前行列資料和當前行列資料且同時提供用於映射的資料的能力。像素值儲存單元16可以與選項資訊提供單元18的控制和操作同步地執行以行列為基礎儲存顯示資料的操作,以及提供用於映射的先前行列資料和當前行列資料的操作。 The pixel
操作單元17可以執行:從像素值儲存單元16接收先前行列資料和當前行列資料,並映射先前行列資料和當前行列資料以計算在先前行列資料與當前行列資料之間的資料變化的操作;藉由參考資料變化判斷顯示型態的操作;通過當前行列資料的電荷共享計算功率增益Ps和功率損耗Pw的操作;比較功率增益Ps和功率損耗Pw的操作;以及當電荷共享施用於當前行列資料或當電荷共享未施用於當前行列資料時,檢測源極驅動器輸出的最大變化Lpeak_cs或Lpeak_ncs的操作。操作單元17可以執行從根據顯示型態的操作中所選擇的操作,並將操作結果提供給選項資訊提供單元18。 The
選項資訊提供單元18可以控制操作單元17以根據顯示型態選擇要執行的操作、接收操作結果以決定與顯示型態相對應的選項資訊、以及將所決定的選項資訊提供給封包形成單元12。 The option
亦即,選項資訊形成單元15可以決定通過圖4的可調適電荷共享操作所獲得的第二選項資訊或者通過圖10的低功率模式控制操作所獲得的第一選項資訊;以及將所決定的第一選項資訊或第二選項資訊提供給封包形成單元12。 That is, the option
當顯示型態對應於動態型態時,執行圖4的可調適電荷共享操作。 When the display type corresponds to the dynamic type, the adjustable charge sharing operation of FIG. 4 is performed.
可調適電荷共享操作可以簡單地總結如下。可調適電荷共享操作包括:映射並比較先前行列資料和當前行列資料;通過對當前行列資料的電荷共享計算功率增益Ps和功率損耗Pw;以及藉由在功率增益Ps與功率損耗Pw之間的比較結果和電荷共享是否施用於先前行列資料,決定是否將電荷共享施用於當前行列資料。 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.
亦即,通過可調適電荷共享控制操作獲得的第二選項資訊可以被理解為:表示是否將電荷共享施用於與當前行列資料相對應的源極訊號的資訊。 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.
當顯示型態對應於靜態型態時,執行圖10的低功率模式控制操作。 When the display mode corresponds to the static mode, the low power mode control operation of FIG. 10 is performed.
低功率模式控制操作可以簡單地總結如下。低功率模式控制操作包括:映射和比較先前行列資料和當前行列資料;在對當前行列資料施用電荷共享的情況下,檢測源極驅動器輸出的第一最大變化;以及選擇第一最大變化作為第一選項位準。此外,低功率模式控制操作包括:映射和比較先前行列資料和當前行列資料;在未對當前行列資料施用電荷共享的情況下,檢測源極驅動器輸出的第二最大變化;以及選擇第二最大變化作為第二選項位準。 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.
接著,根據是否對先前行列資料施用電荷共享,選擇第一選項位準和第二選項位準的其中之一,作為第一選項資訊以施加於封包。 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.
以下將參照圖4詳細描述可調適電荷共享控制操作。 The adjustable charge sharing control operation will be described in detail below with reference to FIG. 4 .
首先,當顯示型態是動態型態時,時序控制器10將先前行列資料N-1 Line和當前行列資料N Line儲存在像素值儲存單元16中,以在步驟S30中決定是否施用電荷共享,且在步驟S32,操作單元17將先前行列資料N-1 Line和當前行列資料N Line相互映射。 First, when the display type is a dynamic type, the
顯示面板30包括根據其類型以不同形式配置的像素。圖5說明以正常形式配置之顯示面板30的像素的佈置,以及圖6說明以Z反轉形式配置之顯示面板30的像素的佈置。在圖5和圖6中,Rx像素表示紅色像素,Bx像素表示藍色像素,Gx像素表示綠色像素,Du像素表示虛擬像素。 The
時序控制器10可以藉由通過基於行列的紅色像素、藍色像素和綠色像素的排列對顯示資料進行分類來形成封包PKT,且其根據顯示面板30的類型而不同。 The
因此,時序控制器10呼叫用於檢查顯示面板30的規格的資訊,以比較先前行列資料N-1 Line和當前行列資料N Line,並根據顯示面板30的規格執行用於重新排序先前行列資料N-1 Line和當前行列資料N Line的映射。 Therefore, the
接著,時序控制器10通過操作單元17比較先前行列資料和當前行列資料,並在步驟S34計算由當前行列資料的電荷共享所引起的功率增益Ps和功率損耗Pw。可以通過預先在時序控制器10中所設定的表式計算功率增益Ps和功率損耗Pw。 Next, the
根據本發明實施例的源極驅動器20可以通過圖7的特殊電荷共享在所有通道上執行電荷共享。源極驅動器20具有複數個用於輸出源極訊號Sout的複數個通道。特殊電荷共享表示所有通道被劃分為預定數量的群組,並且對各個群組執行電荷共享。在圖7中,用於電荷共享的通道可以通過複數個MOS電晶體來切換,並且複數個MOS電晶體可以根據設計者的意圖以各種方式實現。因此,這裡省略其詳細描述。 The
圖7說明六個通道CH1至CH6被分組為一特殊結構。在這種情況下,在六個通道CH1至CH6中,可以連接用於電荷共享的高輸出緩衝器VH,並且可以連接用於電荷共享的低輸出緩衝器VL。在特殊結構中,電荷共享電壓可以被設置為與連接通道的平均值相對應的位準。 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.
參照圖8和圖9,所述通道具有極性,並基於中間驅動電壓HVDD而改變,並且在以行列為基礎驅動時執行電荷共享。 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.
高輸出緩衝器VH可以在中間驅動電壓HVDD和驅動電壓VDD的範圍內驅動一輸出,並且低輸出緩衝器VL可以在接地電壓VSS和中間驅動電壓HVDD的範圍內驅動一輸出。此時,中間驅動電壓HVDD可以被設定為具有對應於在驅動電壓VDD與接地電壓VSS之間的範圍的二分之一的位準的電壓。用於高輸出緩衝器VH的電荷共享電壓VCS_VH可以被設定為在中間驅動電壓HVDD與驅動電壓VDD之間的位準,並且用於低輸出緩衝器VL的電荷共享電壓VCS_VL可以被設定為在中間驅動電壓HVDD與接地電壓VSS之間的位準。 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.
所述通道可重複驅動和電荷共享,以響應以行列為基礎而變化的像素資料。 The channels are repeatedly driven and charge-shared in response to changing pixel data on a row-column basis.
在重複驅動和電荷共享的同時,可以根據所述通道的電壓變化實現功率節省和功率消耗。 While repeating driving and charge sharing, power saving and power consumption can be achieved according to the voltage variation of the channel.
從功率消耗的觀點來看,電壓位準的降低可以表示顯示面板(即,負載電容器)放電。在這種情況下,可以理解為不消耗功率。 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.
然而,當電壓位準上升到電荷共享位準VCS_VH或VCS_VL時,其可以表示通過放電電流執行充電。在這種情況下,可以達到功率節省。亦即,功率節省可以用於計算由電荷共享引起的功率增益Ps。 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.
此外,當電壓位準從電荷共享位準VCS_VH或VCS_VL上升時,其可以表示能量被消耗。在這種情況下,功率消耗可以用於計算由電荷共享引起的功率損耗Pw。 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.
時序控制器10控制操作單元17,以對通過特殊電荷共享所連接的所有通道比較先前行列資料和當前行列資料,並在步驟S34,計算由當前行列資料的電荷共享所引起的功率增益Ps和功率損耗Pw。 The
當計算功率增益Ps和功率損耗Pw時,在步驟S36,時序控制器10的選項資訊提供單元18檢查是否對先前行列資料施用電荷共享,並在步驟S38,通過操作單元17的操作,檢查功率增益Ps是否大於功率損耗Pw。 When calculating the power gain Ps and the power loss Pw, at step S36, the option
例如,檢查功率增益Ps是否大於功率損耗Pw的步驟S38可以包括:判定功率增益Ps是否大於預設的偏移位準或者大於功率損耗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.
當未對先前行列資料施用電荷共享或者功率增益Ps小於功率損耗Pw時,時序控制器10的選項資訊提供單元18判定不對當前行列資料施用電荷共享,並且在步驟S42關閉電荷共享。在這種情況下,選項資訊提供單元18定義相應的第二選項資訊,並將定義的第二選項資訊提供給封包形成單元12。因此,在步驟S44,封包形成單元12形成施加有第二選項資訊的封包PKT,第二選項資訊表示電荷共享未施用於當前行列資料。 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
另一方面,當對先前行列資料施用電荷共享或者功率增益Ps大於功率損耗Pw時,時序控制器10的選項資訊提供單元18判定對當前行列資料施用電荷共享,並且在步驟S40開啟電荷共享。在這種情況下,選項資訊提供單元18定義相應的第二選項資訊,並將定義的第二選項資訊提供給封包形成單元12。因此,在步驟S44,封包形成單元12形成施加有第二選項資訊的封包PKT,第二選項資訊表示電荷共享施用於當前行列資料。 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
當顯示型態是動態型態時,時序控制器10可以通過圖4的可調適電荷共享控制程序產生關於是否對與當前行列資料對應的源極訊號施用電荷 共享的第二選項資訊,並將包括有第二選項資訊的封包PKT提供到源極驅動器20。 When the display type is a dynamic type, the
源極驅動器20可以在源極訊號上執行可調適電荷共享,以減少功率消耗,以響應表示施用電荷共享的第二選項資訊,或者正常地輸出沒有可調適電荷共享的源極訊號,以響應表示沒有施用電荷共享的第二選項資訊。
以下將參照圖10詳細描述低功率模式控制操作。 The low power mode control operation will be described in detail below with reference to FIG. 10 .
當顯示型態是靜態型態時,時序控制器10可以控制用於源極驅動器20輸出的電流量,以執行如圖10所示之用於降低功率消耗的低功率模式控制操作。 When the display type is the static type, the
當顯示型態是靜態型態時,時序控制器10執行低功率模式控制程序,該程序為檢查源極驅動器20相對於當前行列資料的輸出變化,並判定適合於最大變化的第一選項資訊。 When the display type is a static type, the
參照圖11,第一選項資訊可以由PwRC表示,並且改變為「HHH」、「LHH」或「LLL」。 Referring to FIG. 11, the first option information may be represented by PwRC, and changed to 'HHH', 'LHH' or 'LLL'.
第一選項資訊可以被配置以將電流量控制在可保持源極驅動器20的輸出的範圍內,以響應於靜態型態的行列資料。 The first option information can be configured to control the amount of current within a range that can maintain the output of the
如圖12所示,第一選項資訊可以包含在滿足用於驅動螢幕所需的最小位準和時間的範圍內,並基於行列資料設定以減小電流量。亦即,可以決定第一選項資訊以響應當前行列資料,以減小電流量在保持輸出電壓的範圍內,以響應先前行列資料。 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.
對於該配置,時序控制器10通過操作單元17比較儲存在像素值儲存單元16中的先前行列資料和當前行列資料。 For this configuration, the
時序控制器10的操作單元17比較先前行列資料和當前行列資料,並且在對當前行列資料施用電荷共享的情況下,檢測源極驅動器20的輸出的第一最大變化Lpeak_cs,作為一絕對值。此外,操作單元17比較先前行列資料和當前行列資料,並且在步驟S74,於未對當前行列資料施用電荷共享的情況下,檢測源極驅動器20的輸出的第二最大變化Lpeak_ncs,作為一絕對值。此時,第一大變化Lpeak_cs和第二最大變化Lpeak_ncs可以被儲存為通過特殊電荷共享所連接之所有通道的值中的最大值。 The
時序控制器10的操作單元17分別選擇第一大變化Lpeak_cs和第二最大變化Lpeak_ncs作為第一選項位準和第二選項位準,並在步驟S76決定對應於第一選項位準和第二選項位準的控制選項PWRCcs和PWRCncs。 The operating
接著,在步驟S78,時序控制器10的選項資訊提供單元18檢查電荷共享是否施用於先前行列資料。 Next, in step S78, the option
當對先前行列資料施用電荷共享時,時序控制器10的選項資訊提供單元18可以在步驟S80選擇控制選項PWRCcs作為第一選項資訊PWRC,並將第一選項資訊PWRC提供給封包形成單元12,且封包PKT可以在步驟S84藉由施加第一選項資訊PWRC來形成。另一方面,當電荷共享未施用於先前行列資料時,時序控制器10的選項資訊提供單元18可以在步驟S82選擇控制選項PWRCncs作為第一選項資訊PWRC,並提供第一選項資訊PWRC給封包形成單元12,並且封包PKT可以在步驟S84藉由施加第一選項資訊PWRC來形成。 When charge sharing is applied to the previous row and column data, the option
通過低功率模式控制操作,當顯示型態是靜態型態時,時序控制器10藉由控制用於源極驅動器20的輸出的電流量執行用於降低功率消耗的控制。 Through the low power mode control operation, when the display type is the static type, the
時序控制器10可以以行列資料為基礎,在執行圖4的可調適電荷共享控制操作和圖10的低功率模式控制操作的同時,減少源極驅動器20的功率消耗。 The
時序控制器10可以藉由輸出緩衝器、伽瑪緩衝器和中間驅動電壓緩衝器執行上述之低功率模式控制程序、產生用於控制輸出緩衝器、伽瑪緩衝器和中間驅動電壓緩衝器的個別選項資訊、以及將選項資訊施加於封包PKT。 The
因此,源極驅動器20可以控制輸出緩衝器、伽馬緩衝器和中間驅動電壓緩衝器,以響應個別部分的選項資訊,從而減少整體電流消耗。 Therefore, the
通過上述配置和操作,時序控制器10可以識別顯示型態,並將與識別顯示型態相對應的選項資訊傳送到源極驅動器20,從而減少源極驅動器20的功率消耗。 Through the above configuration and operation, the
此外,根據選項資訊對應的顯示型態,時序控制器10可以在源極驅動器20的輸出上執行電荷共享控制,或者在一個或多個輸出緩衝器、伽瑪緩衝器和中間驅動電壓緩衝器上執行電流控制,從而降低功率消耗。 In addition, according to the display type corresponding to the option information, the
雖然上面已經描述了各種實施例,但是本領域通常知識者將理解,所描述的實施例僅是舉例說明。因此,不應基於所描述的實施例來限制本發明描述的範圍。 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‧‧‧時序控制器 10‧‧‧Sequence controller
20‧‧‧源極驅動器 20‧‧‧Source Driver
30‧‧‧顯示面板 30‧‧‧display panel
PKT‧‧‧封包 PKT‧‧‧packet
Sout‧‧‧源極訊號 Sout‧‧‧source signal
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