TW202016705A - Voltage level shifter cirucit and display panel driving control method - Google Patents

Voltage level shifter cirucit and display panel driving control method Download PDF

Info

Publication number
TW202016705A
TW202016705A TW107136407A TW107136407A TW202016705A TW 202016705 A TW202016705 A TW 202016705A TW 107136407 A TW107136407 A TW 107136407A TW 107136407 A TW107136407 A TW 107136407A TW 202016705 A TW202016705 A TW 202016705A
Authority
TW
Taiwan
Prior art keywords
voltage level
multiplexer
time
voltage
display panel
Prior art date
Application number
TW107136407A
Other languages
Chinese (zh)
Other versions
TWI680394B (en
Inventor
張君維
黃傑銓
Original Assignee
友達光電股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 友達光電股份有限公司 filed Critical 友達光電股份有限公司
Priority to TW107136407A priority Critical patent/TWI680394B/en
Priority to CN201811588326.5A priority patent/CN109410822B/en
Application granted granted Critical
Publication of TWI680394B publication Critical patent/TWI680394B/en
Publication of TW202016705A publication Critical patent/TW202016705A/en

Links

Images

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

A voltage level shifter circuit and a display panel driving control method are disclosed. The voltage level shifter circuit is coupled to a plurality of data lines of a display panel through a multiplexer. The voltage level shifter circuit includes a voltage level shifter unit and a control unit. The voltage level shifter unit is coupled to the multiplexer and receives a first voltage level, a second voltage level and a third voltage level respectively, wherein the third voltage level is higher than the second voltage level and the second voltage level is higher than the first voltage level. The control unit is coupled to the voltage level shifter unit and used to selectively control the voltage level shifter unit to output the first voltage level or the second voltage level to the multiplexer according to a voltage level of a timing control signal.

Description

電壓準位轉換電路及顯示面板驅動控制方法 Voltage level conversion circuit and display panel drive control method

本發明係與顯示裝置有關，尤其是關於一種電壓準位轉換電路及顯示面板驅動控制方法。 The invention relates to a display device, in particular to a voltage level conversion circuit and a display panel drive control method.

一般而言，顯示裝置中之源極驅動器輸出可透過多工器耦接至顯示面板的多條資料線(Data line)，舉例而言，如圖1所示，兩個源極驅動器輸出SO1與SO2可分別透過不同的多工器MUXA與MUXB耦接至四條資料線DL1~DL4。 Generally speaking, the source driver output in the display device can be coupled to multiple data lines of the display panel through a multiplexer. For example, as shown in FIG. 1, the two source drivers output SO1 and SO2 can be coupled to four data lines DL1~DL4 through different multiplexers MUXA and MUXB.

如圖2所示，在多工器MUXA或MUXB開啟的瞬間(例如時間t2及t4)，源極驅動器輸出的資料信號SDAT會出現電壓下降(Voltage drop)的現象，如圖2中之虛線圈起處所示，因而導致顯示面板出現畫素(Pixel)充電率不足的問題。 As shown in FIG. 2, at the moment when the multiplexer MUXA or MUXB is turned on (for example, times t2 and t4), the data signal SDAT output by the source driver will have a voltage drop (Voltage drop) phenomenon, as shown by the dotted circle in FIG. 2 As shown at the beginning, the display panel has a problem of insufficient charging rate of Pixel.

如圖3所示，在多工器MUXA開啟的瞬間(例如時間t2)，已被源極驅動器輸出SO1充飽電的扇出單元FO1會透過多工器MUXA耦接後端尚無電壓的資料線DL1，由於兩者之間存在有相當大的電壓差，導致資料線DL1會瞬間出現較大的電流，因而導致觸控面板雜訊TPN瞬間變大。同理，在多工器MUXB開啟的瞬間(例如 時間t4)亦會有類似情況發生。至於在多工器MUXA或MUXB關閉的瞬間(例如時間t3及t5)，亦會產生較大的觸控面板雜訊TPN。 As shown in FIG. 3, at the instant when the multiplexer MUXA is turned on (for example, time t2), the fan-out unit FO1 that has been fully charged by the source driver output SO1 will be coupled to the back-end data that has no voltage through the multiplexer MUXA Due to the considerable voltage difference between the two lines DL1, the data line DL1 will instantaneously have a large current, which will cause the touch panel noise TPN to instantly increase. Similarly, at the moment when the multiplexer MUXB is turned on (for example A similar situation will occur at time t4). As for the moment when the multiplexer MUXA or MUXB is turned off (for example, times t3 and t5), a larger touch panel noise TPN will also be generated.

如圖4所示，若以源極驅動器輸出SO1為例，習知的操作時序係先由時序控制信號XSTB的下降沿在時間t1啟動源極驅動器輸出SO1開始輸出資料信號SDAT1對扇出單元FO1充電，然後再於時間t2開啟多工器MUXA，使得源極驅動器輸出SO1所輸出的資料信號SDAT能透過多工器MUXA開始對顯示面板內的資料線DL1充電。 As shown in FIG. 4, if the source driver output SO1 is taken as an example, the conventional operation timing is to start the source driver output SO1 at the time t1 by the falling edge of the timing control signal XSTB and start to output the data signal SDAT1 to the fan-out unit FO1 After charging, the multiplexer MUXA is turned on at time t2, so that the data signal SDAT output by the source driver SO1 can start charging the data line DL1 in the display panel through the multiplexer MUXA.

由前述可知：在多工器MUXA開啟的瞬間(亦即時間t2)，資料信號SDAT會出現電壓下降的現象且資料線DL1會出現較大的瞬間電流，導致顯示面板的畫素充電率可能不足且會產生瞬間較大的觸控面板雜訊TPN。 It can be seen from the foregoing that at the moment when the multiplexer MUXA is turned on (that is, at time t2), the data signal SDAT will have a voltage drop and the data line DL1 will have a large instantaneous current, resulting in insufficient pixel charging rate of the display panel And it will generate momentarily large touch panel noise TPN.

然而，由於目前市面上常見的觸控筆大多屬於主動筆的型式，上述較大的觸控面板雜訊TPN很可能導致觸控筆無法順利在觸控面板上操作，亟待解決。 However, since most of the common styluses currently on the market are of the active pen type, the above-mentioned large touch panel noise TPN is likely to cause the stylus to fail to operate smoothly on the touch panel, which needs to be resolved.

因此，本發明提出一種電壓準位轉換電路及顯示面板驅動控制方法，以解決先前技術所遭遇的上述問題。 Therefore, the present invention proposes a voltage level conversion circuit and a display panel driving control method to solve the aforementioned problems encountered in the prior art.

根據本發明之一具體實施例為一種顯示面板驅動控制方法。於此實施例中，顯示面板驅動控制方法用以透過多工器驅動顯示面板中之複數條資料線。 A specific embodiment according to the present invention is a display panel drive control method. In this embodiment, the display panel driving control method is used to drive a plurality of data lines in the display panel through a multiplexer.

顯示面板驅動控制方法包含下列步驟：(a)於第一時 間下，透過時序控制信號啟動對多工器開始進行預充電，其中多工器於第一時間係接收第一電壓準位；(b)於第二時間下，多工器接收第二電壓準位，其中第二時間係晚於第一時間且第二電壓準位高於第一電壓準位；以及(c)於第三時間下，多工器接收第三電壓準位，其中第三時間係晚於第二時間且第三電壓準位高於第二電壓準位。其中，多工器由第二時間之第二電壓準位上升至第三時間之第三電壓準位的速度大於多工器由第一時間之第一電壓準位上升至第二時間之第二電壓準位的速度。 The display panel drive control method includes the following steps: (a) at the first time Sometimes, the pre-charging of the multiplexer starts through the timing control signal, wherein the multiplexer receives the first voltage level at the first time; (b) at the second time, the multiplexer receives the second voltage level Bit, where the second time is later than the first time and the second voltage level is higher than the first voltage level; and (c) at the third time, the multiplexer receives the third voltage level, where the third time It is later than the second time and the third voltage level is higher than the second voltage level. Wherein, the speed of the multiplexer rising from the second voltage level at the second time to the third voltage level at the third time is faster than that of the multiplexer rising from the first voltage level at the first time to the second time at the second time The speed of the voltage level.

於一實施例中，步驟(a)係根據時序控制信號之上升沿觸發對多工器進行預充電。 In one embodiment, step (a) triggers pre-charging of the multiplexer according to the rising edge of the timing control signal.

於一實施例中，步驟(c)還包含：當多工器接收第三電壓準位時，停止對多工器進行預充電。 In an embodiment, step (c) further includes: when the multiplexer receives the third voltage level, stop pre-charging the multiplexer.

於一實施例中，多工器於第一時間係處於關閉狀態。 In one embodiment, the multiplexer is turned off at the first time.

於一實施例中，多工器於第二時間係處於部分開啟狀態。 In one embodiment, the multiplexer is partially turned on at the second time.

於一實施例中，多工器於第三時間係處於完全開啟狀態。 In one embodiment, the multiplexer is fully turned on at the third time.

於一實施例中，顯示面板驅動控制方法進一步包含下列步驟：(d)於第一時間下，根據時序控制信號亦同時觸發對該複數條資料線開始進行充電。 In one embodiment, the display panel driving control method further includes the following steps: (d) At the first time, the plurality of data lines are simultaneously triggered to start charging according to the timing control signal.

於一實施例中，步驟(d)係根據時序控制信號之上升沿觸發啟動對該複數條資料線開始進行充電。 In one embodiment, step (d) is to start charging the plurality of data lines according to the trigger of the rising edge of the timing control signal.

於一實施例中，顯示面板驅動控制方法進一步包含下列步驟：於第四時間下，觸發多工器開始進行預放電，其中第四時間係晚於第三時間且多工器於第四時間接收第三電壓準位；於第五時間下，多工器接收第四電壓準位，其中第五時間係晚於第四時間且第四電壓準位低於第三電壓準位；以及於第六時間下，多工器接收第一電壓準位，其中第六時間係晚於第五時間且第一電壓準位低於第四電壓準位。 In one embodiment, the display panel driving control method further includes the following steps: at the fourth time, the multiplexer is triggered to start pre-discharge, wherein the fourth time is later than the third time and the multiplexer receives at the fourth time The third voltage level; at the fifth time, the multiplexer receives the fourth voltage level, where the fifth time is later than the fourth time and the fourth voltage level is lower than the third voltage level; and at the sixth At time, the multiplexer receives the first voltage level, where the sixth time is later than the fifth time and the first voltage level is lower than the fourth voltage level.

於一實施例中，多工器由第五時間之第四電壓準位下降至第六時間之第一電壓準位的速度大於多工器由第四時間之第三電壓準位下降至第五時間之第四電壓準位的速度。 In an embodiment, the speed of the multiplexer falling from the fourth voltage level at the fifth time to the first voltage level at the sixth time is faster than that of the multiplexer falling from the third voltage level at the fourth time to the fifth The speed of the fourth voltage level of time.

根據本發明之另一具體實施例為一種電壓準位轉換電路。於此實施例中，電壓準位轉換電路透過多工器耦接顯示面板中之複數條資料線。電壓準位轉換電路包含電壓準位轉換單元及控制單元。電壓準位轉換單元耦接多工器並分別接收第一電壓準位、第二電壓準位及第三電壓準位，其中第三電壓準位高於第二電壓準位且第二電壓準位高於第一電壓準位。控制單元耦接電壓準位轉換單元，用以根據時序控制信號之電壓準位選擇性地控制電壓準位轉換單元輸出第一電壓準位或第二電壓準位至多工器。 Another specific embodiment according to the present invention is a voltage level conversion circuit. In this embodiment, the voltage level conversion circuit is coupled to a plurality of data lines in the display panel through a multiplexer. The voltage level conversion circuit includes a voltage level conversion unit and a control unit. The voltage level conversion unit is coupled to the multiplexer and respectively receives the first voltage level, the second voltage level and the third voltage level, wherein the third voltage level is higher than the second voltage level and the second voltage level Higher than the first voltage level. The control unit is coupled to the voltage level conversion unit for selectively controlling the voltage level conversion unit to output the first voltage level or the second voltage level to the multiplexer according to the voltage level of the timing control signal.

根據本發明之另一具體實施例亦為一種電壓準位轉換電路。於此實施例中，電壓準位轉換電路透過多工器耦接顯示面板中之複數條資料線。電壓準位轉換電路包含分壓單元、電壓準位轉換單元及控制單元。分壓單元分別接收第一電壓準位、第二電壓 準位及第三電壓準位並據以產生複數個候選電壓準位，其中第三電壓準位高於第二電壓準位且第二電壓準位高於第一電壓準位。電壓準位轉換單元分別耦接多工器及分壓單元，用以接收該複數個候選電壓準位。控制單元耦接電壓準位轉換單元，用以根據時序控制信號之電壓準位選擇性地控制電壓準位轉換單元輸出該複數個候選電壓準位至多工器。 Another specific embodiment according to the present invention is also a voltage level conversion circuit. In this embodiment, the voltage level conversion circuit is coupled to a plurality of data lines in the display panel through a multiplexer. The voltage level conversion circuit includes a voltage dividing unit, a voltage level conversion unit and a control unit. The voltage dividing unit respectively receives the first voltage level and the second voltage The level and the third voltage level are combined to generate a plurality of candidate voltage levels, wherein the third voltage level is higher than the second voltage level and the second voltage level is higher than the first voltage level. The voltage level conversion unit is respectively coupled to the multiplexer and the voltage dividing unit, and is used to receive the plurality of candidate voltage levels. The control unit is coupled to the voltage level conversion unit for selectively controlling the voltage level conversion unit to output the plurality of candidate voltage levels to the multiplexer according to the voltage level of the timing control signal.

相較於先前技術，於本發明的電壓準位轉換電路及顯示面板驅動控制方法中，時序控制信號的上升沿除了觸發源極驅動器輸出開始輸出資料信號對扇出單元充電之外，亦同時觸發多工器部分開啟而開始以指數型預充電曲線對顯示面板的資料線預充電一段時間後再完全開啟多工器對資料線充電。 Compared with the prior art, in the voltage level conversion circuit and the display panel driving control method of the present invention, the rising edge of the timing control signal triggers the source driver output to start outputting the data signal to charge the fan-out unit, and also triggers The multiplexer is partially turned on and starts to precharge the data line of the display panel with an exponential precharge curve for a period of time, and then fully turns on the multiplexer to charge the data line.

由於本發明在完全開啟多工器對顯示面板的資料線充電之前，會先部分開啟多工器對顯示面板的資料線預充電，不僅可延長資料線的有效充電時間並使資料線之充電變得較線性，亦可降低完全開啟多工器時之資料線的瞬間電流並避免電壓下降的現象出現。 Since the present invention fully opens the multiplexer to precharge the data line of the display panel before fully opening the multiplexer to charge the data line of the display panel, not only can the effective charging time of the data line be prolonged and the charging of the data line can be changed Being more linear, it can also reduce the instantaneous current of the data line when the multiplexer is fully turned on and avoid the phenomenon of voltage drop.

因此，本發明的電壓準位轉換電路及顯示面板驅動控制方法能夠有效提升顯示面板的畫素充電率並大幅消除觸控面板雜訊，使得觸控筆能夠順利在觸控面板上操作。 Therefore, the voltage level conversion circuit and the display panel driving control method of the present invention can effectively improve the pixel charging rate of the display panel and greatly eliminate the noise of the touch panel, so that the stylus can operate on the touch panel smoothly.

關於本發明之優點與精神可以藉由以下的發明詳述及所附圖式得到進一步的瞭解。 The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

SO1~SO2‧‧‧源極驅動器輸出 SO1~SO2‧‧‧Source driver output

FO1~FO2‧‧‧扇出單元 FO1~FO2‧‧‧fan-out unit

MUXA~MUXB‧‧‧多工器 MUXA~MUXB‧‧‧Multiplexer

DL1~DL4‧‧‧資料線 DL1~DL4‧‧‧Data cable

CLK‧‧‧時脈信號 CLK‧‧‧clock signal

SDAT、SDAT1‧‧‧資料信號 SDAT, SDAT1‧‧‧Data signal

TPN‧‧‧觸控面板雜訊 TPN‧‧‧Touch panel noise

t1~t7‧‧‧時間 t1~t7‧‧‧time

XSTB‧‧‧時序控制信號 XSTB‧‧‧sequence control signal

TCON‧‧‧時序控制器 TCON‧‧‧Timing controller

LS‧‧‧電壓準位轉換電路 LS‧‧‧Voltage level conversion circuit

MLS‧‧‧電壓準位轉換單元 MLS‧‧‧Voltage level conversion unit

CU‧‧‧控制單元 CU‧‧‧Control unit

FB‧‧‧回授單元 FB‧‧‧ Feedback Unit

EA1‧‧‧第一誤差放大器 EA1‧‧‧The first error amplifier

EA2‧‧‧第二誤差放大器 EA2‧‧‧Second Error Amplifier

+‧‧‧正輸入端 +‧‧‧positive input

-‧‧‧負輸入端 -‧‧‧Negative input

SWA‧‧‧第一時序控制信號 SWA‧‧‧First sequence control signal

SWB‧‧‧第二時序控制信號 SWB‧‧‧Second sequence control signal

VGL‧‧‧第一電壓準位 VGL‧‧‧First voltage level

GND‧‧‧第二電壓準位 GND‧‧‧Second voltage level

VGH‧‧‧第三電壓準位 VGH‧‧‧third voltage level

VREF‧‧‧參考電壓 VREF‧‧‧Reference voltage

MTP‧‧‧儲存單元 MTP‧‧‧Storage unit

VDU‧‧‧分壓單元 VDU‧‧‧Voltage dividing unit

MOP‧‧‧多工放大單元 MOP‧‧‧Multiplexer

R‧‧‧分壓電阻 R‧‧‧Voltage resistor

MUX‧‧‧多工器 MUX‧‧‧Multiplexer

OP‧‧‧運算放大器 OP‧‧‧Operational amplifier

tx‧‧‧特定時間 tx‧‧‧ specific time

Vx‧‧‧特定電壓準位 Vx‧‧‧Special voltage level

S10~S14‧‧‧步驟 S10~S14‧‧‧Step

圖1係繪示習知的源極驅動器輸出透過多工器耦接至顯示面板的複數條資料線之示意圖。 FIG. 1 is a schematic diagram illustrating a plurality of data lines of a conventional source driver output coupled to a display panel through a multiplexer.

圖2係繪示習知的源極驅動器輸出的資料信號在多工器開啟的瞬間會出現電壓下降之時序圖。 FIG. 2 is a timing diagram showing the voltage drop of the data signal output by the conventional source driver when the multiplexer is turned on.

圖3係繪示習知的扇出單元與資料線之間在多工器開啟的瞬間產生較大的電壓差導致資料線出現較大的瞬間電流而使觸控面板雜訊變大之時序圖。 FIG. 3 is a timing diagram showing a conventional fan-out unit and a data line that generate a large voltage difference at the moment the multiplexer is turned on, resulting in a large instantaneous current in the data line, which increases the noise of the touch panel. .

圖4係繪示習知的驅動方法在多工器開啟的瞬間會導致資料信號之電壓下降且觸控面板雜訊變大之時序圖。 FIG. 4 is a timing diagram illustrating that the conventional driving method causes the voltage of the data signal to drop and the noise of the touch panel to become larger at the moment when the multiplexer is turned on.

圖5係繪示根據本發明之一較佳具體實施例中之電壓準位轉換電路的示意圖。 5 is a schematic diagram of a voltage level conversion circuit according to a preferred embodiment of the present invention.

圖6係繪示根據本發明之另一較佳具體實施例中之電壓準位轉換電路的示意圖。 6 is a schematic diagram of a voltage level conversion circuit according to another preferred embodiment of the present invention.

圖7係繪示根據本發明之又一較佳具體實施例中之電壓準位轉換電路的示意圖。 7 is a schematic diagram of a voltage level conversion circuit according to yet another preferred embodiment of the present invention.

圖8及圖9係分別繪示於不同實施例中之時序控制信號的上升沿觸發對多工器開始進行預充電的時序圖。 FIG. 8 and FIG. 9 are timing diagrams showing that the rising edge of the timing control signal triggers pre-charging of the multiplexer in different embodiments, respectively.

圖10係繪示本發明可在完全開啟多工器的瞬間改善資料信號之電壓下降與觸控面板雜訊的時序圖。 10 is a timing diagram illustrating that the present invention can improve the voltage drop of the data signal and the noise of the touch panel at the instant when the multiplexer is fully turned on.

圖11係繪示根據本發明之另一較佳具體實施例中之顯示面板驅動控制方法的流程圖。 FIG. 11 is a flowchart illustrating a display panel driving control method according to another preferred embodiment of the present invention.

在下文中將參照附圖更全面地描述本發明，在附圖中示出了本發明的示例性實施例。如本領域技術人員將認識到的，可以以各種不同的方式修改所描述的實施例，而不脫離本發明的精神或範圍。 Hereinafter, the present invention will be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the present invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

在附圖中，為了清楚起見，放大了部份區域。在整個說明書中，相同的附圖標記表示相同的元件。應當理解，當諸如區域或基板的元件被稱為在另一元件“上”或者“連接(或稱為耦接)”又或者“電性連接”另一元件時，其可以直接在另一元件上或與另一元件連接(或稱為耦接)或電性連接，或者中間元件可以也存在。相反，當元件被稱為“直接在另一元件上”或“直接連接到”另一元件時，不存在中間元件。如本文所使用的，“連接(或稱為耦接)”可以指物理及/或電連接。 In the drawings, for clarity, part of the area is enlarged. Throughout the specification, the same reference numerals denote the same elements. It should be understood that when an element such as a region or a substrate is referred to as being “on” or “connected (or referred to as coupled)” or “electrically connected” to another element, it can be directly at the other element It may be connected (or referred to as coupled) or electrically connected to another element, or an intermediate element may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected (or referred to as coupled)" may refer to physical and/or electrical connections.

根據本發明之一較佳具體實施例為一種電壓準位轉換電路。於此實施例中，電壓準位轉換電路可受控於時序控制器並可透過多工器耦接顯示面板中之複數條資料線。請參照圖5，圖5係繪示此具體實施例中之電壓準位轉換電路的示意圖。 A preferred embodiment according to the present invention is a voltage level conversion circuit. In this embodiment, the voltage level conversion circuit can be controlled by the timing controller and can be coupled to a plurality of data lines in the display panel through a multiplexer. Please refer to FIG. 5, which is a schematic diagram of the voltage level conversion circuit in this embodiment.

如圖5所示，電壓準位轉換電路LS分別耦接時序控制器TCON與多工器MUXA~MUXB，且多工器MUXA~MUXB可耦接顯示面板中之複數條資料線(圖未示)，例如多工器MUXA可耦接顯示面板中之兩條資料線且多工器MUXB可耦接顯示面板中之另兩條資料線，但不以此為限。 As shown in FIG. 5, the voltage level conversion circuit LS is respectively coupled to the timing controller TCON and the multiplexers MUXA~MUXB, and the multiplexers MUXA~MUXB can be coupled to a plurality of data lines in the display panel (not shown) For example, the multiplexer MUXA can be coupled to two data lines in the display panel and the multiplexer MUXB can be coupled to the other two data lines in the display panel, but not limited to this.

於此實施例中，電壓準位轉換電路LS包含電壓準位 轉換單元MLS、控制單元CU及回授單元FB。其中，控制單元CU分別耦接時序控制器TCON、電壓準位轉換單元MLS及回授單元FB；電壓準位轉換單元MLS分別耦接控制單元CU、多工器MUXA~MUXB及回授單元FB。 In this embodiment, the voltage level conversion circuit LS includes a voltage level Conversion unit MLS, control unit CU and feedback unit FB. The control unit CU is respectively coupled to the timing controller TCON, the voltage level conversion unit MLS and the feedback unit FB; the voltage level conversion unit MLS is respectively coupled to the control unit CU, the multiplexers MUXA~MUXB and the feedback unit FB.

回授單元FB包含第一誤差放大器EA1與第二誤差放大器EA2。第一誤差放大器EA1之正輸入端+耦接至電壓準位轉換單元MLS與多工器MUXA之間且誤差放大器EA1之輸出端耦接至控制單元CU；誤差放大器EA2之正輸入端+耦接至電壓準位轉換單元MLS與多工器MUXB之間且誤差放大器EA2之輸出端耦接至控制單元CU。 The feedback unit FB includes a first error amplifier EA1 and a second error amplifier EA2. The positive input terminal + of the first error amplifier EA1 is coupled between the voltage level conversion unit MLS and the multiplexer MUXA and the output terminal of the error amplifier EA1 is coupled to the control unit CU; the positive input terminal + of the error amplifier EA2 is coupled The output terminal of the error amplifier EA2 is coupled to the control unit CU between the voltage level conversion unit MLS and the multiplexer MUXB.

電壓準位轉換單元MLS分別接收第一電壓準位VGL、第二電壓準位GND及第三電壓準位VGH，其中第三電壓準位VGH高於第二電壓準位GND且第二電壓準位GND高於第一電壓準位VGL，亦即第三電壓準位VGH>第二電壓準位GND>第一電壓準位VGL。 The voltage level conversion unit MLS receives the first voltage level VGL, the second voltage level GND and the third voltage level VGH, wherein the third voltage level VGH is higher than the second voltage level GND and the second voltage level GND is higher than the first voltage level VGL, that is, the third voltage level VGH>the second voltage level GND>the first voltage level VGL.

當控制單元CU接收到時序控制器TCON所提供的第一時序控制信號SWA與第二時序控制信號SWB時，控制單元CU會根據第一時序控制信號SWA與第二時序控制信號SWB的電壓準位選擇性地控制電壓準位轉換單元MLS輸出第一電壓準位VGL或第二電壓準位GND至多工器MUXA~MUXB。 When the control unit CU receives the first timing control signal SWA and the second timing control signal SWB provided by the timing controller TCON, the control unit CU will according to the voltages of the first timing control signal SWA and the second timing control signal SWB The level selectively controls the voltage level conversion unit MLS to output the first voltage level VGL or the second voltage level GND to the multiplexers MUXA~MUXB.

舉例而言，當第一時序控制信號SWA之電壓準位為低準位(Low-level)時，控制單元CU會根據低準位的第一時序控制 信號SWA控制電壓準位轉換單元MLS輸出第一電壓準位VGL至多工器MUXA，此時尚未對多工器MUXA進行預充電；當第一時序控制信號SWA之電壓準位由低準位轉變為高準位(High-level)時，控制單元CU會根據高準位的第一時序控制信號SWA控制電壓準位轉換單元MLS輸出第二電壓準位GND至多工器MUXA，以開始對多工器MUXA進行預充電。也就是說，控制單元CU係受到第一時序控制信號SWA之上升沿(Rising edge)觸發而控制電壓準位轉換單元MLS開始對多工器MUXA進行預充電。 For example, when the voltage level of the first timing control signal SWA is Low-level, the control unit CU will control according to the first timing of the low level The signal SWA controls the voltage level conversion unit MLS to output the first voltage level VGL to the multiplexer MUXA. At this time, the multiplexer MUXA has not been precharged; when the voltage level of the first timing control signal SWA changes from a low level When it is high-level, the control unit CU will control the voltage level conversion unit MLS to output the second voltage level GND to the multiplexer MUXA according to the first timing control signal SWA of the high level to start The tool MUXA is pre-charged. In other words, the control unit CU is triggered by the rising edge of the first timing control signal SWA to control the voltage level conversion unit MLS to start pre-charging the multiplexer MUXA.

同理，當第二時序控制信號SWB之電壓準位為低準位(Low-level)時，控制單元CU會根據低準位的第二時序控制信號SWB控制電壓準位轉換單元MLS輸出第一電壓準位VGL至多工器MUXB，此時尚未對多工器MUXB進行預充電；當第二時序控制信號SWB之電壓準位由低準位轉變為高準位(High-level)時，控制單元CU會根據高準位的第二時序控制信號SWB控制電壓準位轉換單元MLS輸出第二電壓準位GND至多工器MUXB，以開始對多工器MUXB進行預充電。也就是說，控制單元CU係受到第二時序控制信號SWB之上升沿觸發而控制電壓準位轉換單元MLS開始對多工器MUXB進行預充電。 Similarly, when the voltage level of the second timing control signal SWB is Low-level, the control unit CU will control the voltage level conversion unit MLS to output the first level according to the second timing control signal SWB of the low level The voltage level VGL is to the multiplexer MUXB. At this time, the multiplexer MUXB has not been precharged; when the voltage level of the second timing control signal SWB changes from low level to high level, the control unit The CU controls the voltage level conversion unit MLS to output the second voltage level GND to the multiplexer MUXB according to the second timing control signal SWB of the high level to start pre-charging the multiplexer MUXB. In other words, the control unit CU is triggered by the rising edge of the second timing control signal SWB to control the voltage level conversion unit MLS to start pre-charging the multiplexer MUXB.

為了判斷進行預充電之多工器MUXA是否已達到參考電壓VREF，回授單元FB中之第一誤差放大器EA1的正輸入端+接收電壓準位轉換單元MLS輸出至多工器MUXA的預充電電壓且第一誤差放大器EA1的負輸入端-接收參考電壓VREF，並比較兩 者以判斷進行預充電之多工器MUXA是否已達到參考電壓VREF後將判斷結果提供給控制單元CU。 In order to determine whether the multiplexer MUXA that is being precharged has reached the reference voltage VREF, the positive input terminal of the first error amplifier EA1 in the feedback unit FB + the received voltage level conversion unit MLS outputs the precharge voltage to the multiplexer MUXA and The negative input terminal of the first error amplifier EA1-receives the reference voltage VREF, and compares the two In order to determine whether the multiplexer MUXA for precharging has reached the reference voltage VREF, the determination result is provided to the control unit CU.

若上述判斷結果為是，代表多工器MUXA已預充電至參考電壓VREF，則控制單元CU會控制電壓準位轉換單元MLS輸出第三電壓準位VGH至多工器MUXA，以結束電壓準位轉換單元MLS對多工器MUXA之預充電；若上述判斷結果為否，代表多工器MUXA尚未預充電至參考電壓VREF，則電壓準位轉換單元MLS會繼續對多工器MUXA進行預充電。 If the above judgment result is yes, it means that the multiplexer MUXA has been precharged to the reference voltage VREF, then the control unit CU will control the voltage level conversion unit MLS to output the third voltage level VGH to the multiplexer MUXA, to end the voltage level conversion The unit MLS precharges the multiplexer MUXA; if the above judgment result is no, it means that the multiplexer MUXA has not been precharged to the reference voltage VREF, then the voltage level conversion unit MLS will continue to precharge the multiplexer MUXA.

同理，回授單元FB中之第二誤差放大器EA2的正輸入端+接收電壓準位轉換單元MLS輸出至多工器MUXB的預充電電壓且第二誤差放大器EA2的負輸入端-接收參考電壓VREF，並比較兩者以判斷進行預充電之多工器MUXB是否已達到參考電壓VREF後將判斷結果提供給控制單元CU。 Similarly, the positive input terminal of the second error amplifier EA2 in the feedback unit FB + the precharge voltage output from the received voltage level conversion unit MLS to the multiplexer MUXB and the negative input terminal of the second error amplifier EA2-the received reference voltage VREF And compare the two to determine whether the multiplexer MUXB for pre-charging has reached the reference voltage VREF and provide the judgment result to the control unit CU.

若上述判斷結果為是，代表多工器MUXB已預充電至參考電壓VREF，則控制單元CU會控制電壓準位轉換單元MLS輸出第三電壓準位VGH至多工器MUXB，以結束電壓準位轉換單元MLS對多工器MUXB之預充電；若上述判斷結果為否，代表多工器MUXB尚未預充電至參考電壓VREF，則電壓準位轉換單元MLS會繼續對多工器MUXB進行預充電。 If the above judgment result is yes, it means that the multiplexer MUXB has been precharged to the reference voltage VREF, then the control unit CU will control the voltage level conversion unit MLS to output the third voltage level VGH to the multiplexer MUXB to end the voltage level conversion The unit MLS precharges the multiplexer MUXB; if the above judgment result is no, it means that the multiplexer MUXB has not been precharged to the reference voltage VREF, then the voltage level conversion unit MLS will continue to precharge the multiplexer MUXB.

於另一實施例中，請參照圖6，電壓準位轉換電路LS並未包含回授單元FB，而是包含耦接控制單元CU的儲存單元MTP。於實際應用中，儲存單元MTP可以是多次性可編程(Multi-Time Programming,MTP)電路，用以儲存預設資訊，但不以此為限。 In another embodiment, please refer to FIG. 6, the voltage level conversion circuit LS does not include the feedback unit FB, but includes a storage unit MTP coupled to the control unit CU. In practical applications, the storage unit MTP can be multi-time programmable (Multi-Time Programming, MTP) circuit, used to store preset information, but not limited to this.

當時序控制器TCON所提供的第一時序控制信號SWA之電壓準位為低準位時，控制單元CU會輸出第一電壓準位VGL至多工器MUXA，此時尚未對多工器MUXA進行預充電；當時序控制器TCON所提供的第一時序控制信號SWA之電壓準位由低準位轉變為高準位時，控制單元CU會根據儲存單元MTP所儲存的預設資訊於預設時間內控制電壓準位轉換單元MLS輸出第二電壓準位GND至多工器MUXA，以開始對多工器MUXA進行預充電。也就是說，控制單元CU係受到第一時序控制信號SWA之上升沿觸發而控制電壓準位轉換單元MLS開始對多工器MUXA進行預充電。當預設時間結束時，控制單元CU會控制電壓準位轉換單元MLS輸出第三電壓準位VGH至多工器MUXA，以結束對多工器MUXA之預充電。 When the voltage level of the first timing control signal SWA provided by the timing controller TCON is the low level, the control unit CU will output the first voltage level VGL to the multiplexer MUXA. Pre-charging; when the voltage level of the first timing control signal SWA provided by the timing controller TCON changes from a low level to a high level, the control unit CU will preset the preset information according to the preset information stored in the storage unit MTP The voltage level conversion unit MLS is controlled to output the second voltage level GND to the multiplexer MUXA within a time to start pre-charging the multiplexer MUXA. In other words, the control unit CU is triggered by the rising edge of the first timing control signal SWA to control the voltage level conversion unit MLS to start pre-charging the multiplexer MUXA. When the preset time is over, the control unit CU will control the voltage level conversion unit MLS to output the third voltage level VGH to the multiplexer MUXA to end the pre-charging of the multiplexer MUXA.

同理，當時序控制器TCON所提供的第二時序控制信號SWB之電壓準位為低準位時，控制單元CU會輸出第一電壓準位VGL至多工器MUXB，此時尚未對多工器MUXB進行預充電；當時序控制器TCON所提供的第二時序控制信號SWB之電壓準位由低準位轉變為高準位時，控制單元CU會根據儲存單元MTP所儲存的預設資訊於預設時間內控制電壓準位轉換單元MLS輸出第二電壓準位GND至多工器MUXB，以開始對多工器MUXB進行預充電。也就是說，控制單元CU係受到第二時序控制信號SWB之上升沿觸發而控制電壓準位轉換單元MLS開始對多工器MUXB進行預充電。當 預設時間結束時，控制單元CU會控制電壓準位轉換單元MLS輸出第三電壓準位VGH至多工器MUXB，以結束對多工器MUXB之預充電。 Similarly, when the voltage level of the second timing control signal SWB provided by the timing controller TCON is low, the control unit CU will output the first voltage level VGL to the multiplexer MUXB. MUXB performs pre-charging; when the voltage level of the second timing control signal SWB provided by the timing controller TCON changes from a low level to a high level, the control unit CU will perform a pre-charge based on the preset information stored in the storage unit MTP Within a set time, the control voltage level conversion unit MLS outputs the second voltage level GND to the multiplexer MUXB to start pre-charging the multiplexer MUXB. In other words, the control unit CU is triggered by the rising edge of the second timing control signal SWB to control the voltage level conversion unit MLS to start pre-charging the multiplexer MUXB. when At the end of the preset time, the control unit CU will control the voltage level conversion unit MLS to output the third voltage level VGH to the multiplexer MUXB to end the precharge of the multiplexer MUXB.

於另一實施例中，請參照圖7，電壓準位轉換電路LS可包含控制單元CU、電壓準位轉換單元MLS、儲存單元MTP、分壓單元VDU及多工放大單元MOP。其中，控制單元CU分別耦接時序控制器TCON、電壓準位轉換單元MLS、多工放大單元MOP及儲存單元MTP；電壓準位轉換單元MLS分別耦接控制單元CU、多工放大單元MOP及多工器MUXA~MUXB；分壓單元VDU耦接多工放大單元MOP；多工放大單元MOP分別耦接控制單元CU及電壓準位轉換單元MLS。 In another embodiment, please refer to FIG. 7, the voltage level conversion circuit LS may include a control unit CU, a voltage level conversion unit MLS, a storage unit MTP, a voltage division unit VDU, and a multiplexing amplifier unit MOP. Among them, the control unit CU is coupled to the timing controller TCON, the voltage level conversion unit MLS, the multiplexing amplifier unit MOP and the storage unit MTP; the voltage level conversion unit MLS is respectively coupled to the control unit CU, the multiplexing amplifier unit MOP and multiple MUXA~MUXB; the voltage division unit VDU is coupled to the multiplexing amplifier unit MOP; the multiplexing amplifier unit MOP is respectively coupled to the control unit CU and the voltage level conversion unit MLS.

分壓單元VDU分別接收第一電壓準位VGL、第二電壓準位GND及第三電壓準位VGH，其中第三電壓準位VGH高於第二電壓準位GND且第二電壓準位GND高於第一電壓準位VGL。分壓單元VDU會根據第一電壓準位VGL、第二電壓準位GND及第三電壓準位VGH產生複數個候選電壓準位，並經由多工放大單元MOP之處理後提供給電壓準位轉換單元MLS。 The voltage dividing unit VDU respectively receives a first voltage level VGL, a second voltage level GND and a third voltage level VGH, wherein the third voltage level VGH is higher than the second voltage level GND and the second voltage level GND is high At the first voltage level VGL. The voltage dividing unit VDU generates a plurality of candidate voltage levels according to the first voltage level VGL, the second voltage level GND, and the third voltage level VGH, and provides the voltage level conversion after processing by the multiplexing amplifier unit MOP Unit MLS.

當控制單元CU接收到時序控制器TCON所提供的第一時序控制信號SWA時，控制單元CU會根據第一時序控制信號SWA之電壓準位選擇性地控制電壓準位轉換單元MLS輸出該複數個候選電壓準位至多工器MUXA。 When the control unit CU receives the first timing control signal SWA provided by the timing controller TCON, the control unit CU will selectively control the voltage level conversion unit MLS to output the voltage according to the voltage level of the first timing control signal SWA A plurality of candidate voltage levels are to the multiplexer MUXA.

舉例而言，當第一時序控制信號SWA之電壓準位為 低準位時，控制單元CU會根據低準位的第一時序控制信號SWA控制電壓準位轉換單元MLS輸出該複數個候選電壓準位中之一最低候選電壓準位(例如第一電壓準位VGL)至多工器MUXA，此時尚未對多工器MUXA預充電；當第一時序控制信號SWA之電壓準位由低準位轉變為高準位時，控制單元CU會根據高準位的第一時序控制信號SWA於預設時間內控制電壓準位轉換單元MLS輸出該複數個候選電壓準位中高於最低候選電壓準位(例如第一電壓準位VGL)且低於最高候選電壓準位(例如第三電壓準位VGH)的候選電壓準位(包含第二電壓準位GND，但不以此為限)，以對多工器MUXA預充電。也就是說，控制單元CU係受到第一時序控制信號SWA之上升沿觸發而控制電壓準位轉換單元MLS開始對多工器MUXA進行預充電。當預設時間結束時，控制單元CU會控制電壓準位轉換單元MLS輸出最高候選電壓準位(例如第三電壓準位VGH)至多工器MUXA，以結束對多工器MUXA之預充電。 For example, when the voltage level of the first timing control signal SWA is When the level is low, the control unit CU controls the voltage level conversion unit MLS according to the first timing control signal SWA of the low level to output one of the lowest candidate voltage levels (for example, the first voltage level) of the plurality of candidate voltage levels VGL) to the multiplexer MUXA, at this time the multiplexer MUXA has not been pre-charged; when the voltage level of the first timing control signal SWA changes from low level to high level, the control unit CU will follow the high level The first timing control signal SWA controls the voltage level conversion unit MLS to output the plurality of candidate voltage levels higher than the lowest candidate voltage level (such as the first voltage level VGL) and lower than the highest candidate voltage within a preset time The candidate voltage level of the level (eg, the third voltage level VGH) (including the second voltage level GND, but not limited to this) is used to precharge the multiplexer MUXA. In other words, the control unit CU is triggered by the rising edge of the first timing control signal SWA to control the voltage level conversion unit MLS to start pre-charging the multiplexer MUXA. When the preset time ends, the control unit CU will control the voltage level conversion unit MLS to output the highest candidate voltage level (for example, the third voltage level VGH) to the multiplexer MUXA, to end the precharge of the multiplexer MUXA.

同理，當控制單元CU接收到時序控制器TCON所提供的第二時序控制信號SWB時，控制單元CU會根據第二時序控制信號SWB之電壓準位選擇性地控制電壓準位轉換單元MLS輸出該複數個候選電壓準位至多工器MUXB。 Similarly, when the control unit CU receives the second timing control signal SWB provided by the timing controller TCON, the control unit CU will selectively control the output of the voltage level conversion unit MLS according to the voltage level of the second timing control signal SWB The plurality of candidate voltage levels are sent to the multiplexer MUXB.

舉例而言，當第二時序控制信號SWB之電壓準位為低準位時，控制單元CU會根據低準位的第二時序控制信號SWB控制電壓準位轉換單元MLS輸出該複數個候選電壓準位中之一最低候選電壓準位(例如第一電壓準位VGL)至多工器MUXB，此時尚未 對多工器MUXB預充電；當第二時序控制信號SWB之電壓準位由低準位轉變為高準位時，控制單元CU會根據高準位的第二時序控制信號SWB於預設時間內控制電壓準位轉換單元MLS輸出該複數個候選電壓準位中高於最低候選電壓準位(例如第一電壓準位VGL)且低於最高候選電壓準位(例如第三電壓準位VGH)的候選電壓準位(包含第二電壓準位GND，但不以此為限)，以對多工器MUXB預充電。也就是說，控制單元CU係受到第二時序控制信號SWB之上升沿觸發而控制電壓準位轉換單元MLS開始對多工器MUXB進行預充電。當預設時間結束時，控制單元CU會控制電壓準位轉換單元MLS輸出最高候選電壓準位(例如第三電壓準位VGH)至多工器MUXB，以結束對多工器MUXB之預充電。 For example, when the voltage level of the second timing control signal SWB is low, the control unit CU controls the voltage level conversion unit MLS to output the plurality of candidate voltage levels according to the second timing control signal SWB of the low level One of the lowest candidate voltage levels (such as the first voltage level VGL) to the multiplexer MUXB, has not yet Pre-charge the multiplexer MUXB; when the voltage level of the second timing control signal SWB changes from the low level to the high level, the control unit CU will use the second timing control signal SWB of the high level within a preset time The control voltage level conversion unit MLS outputs the candidate of the plurality of candidate voltage levels that is higher than the lowest candidate voltage level (such as the first voltage level VGL) and lower than the highest candidate voltage level (such as the third voltage level VGH) The voltage level (including the second voltage level GND, but not limited to this) is used to pre-charge the multiplexer MUXB. In other words, the control unit CU is triggered by the rising edge of the second timing control signal SWB to control the voltage level conversion unit MLS to start pre-charging the multiplexer MUXB. When the preset time is over, the control unit CU will control the voltage level conversion unit MLS to output the highest candidate voltage level (for example, the third voltage level VGH) to the multiplexer MUXB to end the precharge of the multiplexer MUXB.

於一實施例中，電壓準位轉換單元MLS可包含複數個運算放大器(圖未示)。控制單元CU可輸出推力控制信號至電壓準位轉換單元MLS，藉以控制該複數個運算放大器提供相對應之推力將電壓準位轉換單元MLS所接收到的該複數個候選電壓準位輸出至多工器MUXA或MUXB，致使該複數個候選電壓準位形成指數型預充電曲線，但不以此為限。 In one embodiment, the voltage level conversion unit MLS may include a plurality of operational amplifiers (not shown). The control unit CU can output a thrust control signal to the voltage level conversion unit MLS, thereby controlling the plurality of operational amplifiers to provide corresponding thrust to output the plurality of candidate voltage levels received by the voltage level conversion unit MLS to the multiplexer MUXA or MUXB causes the plurality of candidate voltage levels to form an exponential precharge curve, but not limited to this.

於實際應用中，分壓單元VDU可包含複數個分壓電阻R，且該複數個分壓電阻R可彼此串聯於第三電壓準位VGH與第一電壓準位VGL之間，而第二電壓準位GND可耦接至該複數個分壓電阻R中之任兩個分壓電阻R之間，但不以此為限。 In practical applications, the voltage dividing unit VDU may include a plurality of voltage dividing resistors R, and the plurality of voltage dividing resistors R may be connected in series between the third voltage level VGH and the first voltage level VGL, and the second voltage The level GND can be coupled between any two of the plurality of voltage dividing resistors R, but not limited to this.

請參照圖8及圖9，時序控制信號XSTB為資料信號 SDAT輸出的觸發訊號，在時序控制信號XSTB下降(Falling)時，資料信號SDAT才會輸出。需說明的是，由於第一時序控制信號SWA與第二時序控制信號SWB就是與多工器MUXA與MUXB的同相的電壓放大信號，所以在圖8及圖9並未特別標出。於實際應用中，多工器MUXA與MUXB由低準位轉變為高準位的時間不限定在時序控制信號XSTB下降之後，因為有預充電以及指數區線充電的行為，所以也可以提前在時序控制信號XSTB下降之前轉態。 Please refer to FIGS. 8 and 9, the timing control signal XSTB is a data signal The trigger signal output by SDAT is output when the timing control signal XSTB falls (Falling). It should be noted that, since the first timing control signal SWA and the second timing control signal SWB are voltage amplification signals in phase with the multiplexers MUXA and MUXB, they are not specifically marked in FIGS. 8 and 9. In practical applications, the time for the multiplexers MUXA and MUXB to change from low level to high level is not limited after the timing control signal XSTB falls. Because of the pre-charging and exponential zone line charging behavior, you can also advance the timing The control signal XSTB changes state before falling.

如圖8所示，假設兩個多工器MUXA~MUXB係採用MUXA、MUXB、MUXB、MUXA之操作時序。於時間t1，第一時序控制信號SWA(SWA為多工器MUXA的同相的電壓放大訊號，所以未標示)的上升沿觸發對多工器MUXA開始進行預充電，直至多工器MUXA於時間t2完全開啟為止。此外，時序控制信號XSTB的下降沿於時間t1亦同時啟動資料信號SDAT開始對顯示面板中之資料線進行充電。同理，於時間t4，第二時序控制信號SWB(SWB為多工器MUXB的同相的電壓放大訊號，所以未標示)的上升沿觸發對多工器MUXB開始進行預充電，直至多工器MUXB於時間t5完全開啟為止。 As shown in FIG. 8, it is assumed that the two multiplexers MUXA~MUXB adopt the operation sequence of MUXA, MUXB, MUXB, and MUXA. At time t1, the rising edge of the first timing control signal SWA (SWA is the in-phase voltage amplification signal of the multiplexer MUXA, so it is not marked) triggers the pre-charge of the multiplexer MUXA, until the multiplexer MUXA is at the time t2 is fully open. In addition, the falling edge of the timing control signal XSTB also starts the data signal SDAT at time t1 and starts to charge the data lines in the display panel. Similarly, at time t4, the rising edge of the second timing control signal SWB (SWB is the in-phase voltage amplification signal of the multiplexer MUXB, so it is not marked) triggers the pre-charge of the multiplexer MUXB until the multiplexer MUXB Until time t5 is fully turned on.

如圖9所示，假設兩個多工器MUXA~MUXB係採用MUXA、MUXB、MUXA、MUXB之操作時序。於時間t1，第一時序控制信號SWA(SWA為多工器MUXA的同相的電壓放大訊號，所以未標示)的上升沿觸發對多工器MUXA開始進行預充電，直至多工器MUXA於時間t2完全開啟為止。此外，時序控制信號XSTB的下降 沿於時間t1亦同時啟動資料信號SDAT開始對顯示面板中之資料線進行充電。同理，於時間t4，第二時序控制信號SWB(SWB為多工器MUXB的同相的電壓放大訊號，所以未標示)的上升沿觸發對多工器MUXB開始進行預充電，直至多工器MUXB於時間t5完全開啟為止。 As shown in FIG. 9, assume that the two multiplexers MUXA~MUXB adopt the operation timing of MUXA, MUXB, MUXA, MUXB. At time t1, the rising edge of the first timing control signal SWA (SWA is the in-phase voltage amplification signal of the multiplexer MUXA, so it is not marked) triggers the pre-charge of the multiplexer MUXA, until the multiplexer MUXA is at the time t2 is fully open. In addition, the timing control signal XSTB falls Along with time t1, the data signal SDAT is simultaneously activated to start charging the data lines in the display panel. Similarly, at time t4, the rising edge of the second timing control signal SWB (SWB is the in-phase voltage amplification signal of the multiplexer MUXB, so it is not marked) triggers the pre-charge of the multiplexer MUXB until the multiplexer MUXB Until time t5 is fully turned on.

請參照圖10，本發明可在完全開啟多工器的瞬間改善資料信號之電壓下降與觸控面板雜訊的時序圖。 Referring to FIG. 10, the present invention can improve the timing diagram of the voltage drop of the data signal and the noise of the touch panel at the instant when the multiplexer is fully turned on.

如圖10所示，若以多工器MUXA為例，第一時序控制信號SWA(SWA為多工器MUXA的同相的電壓放大訊號，所以未標示)的上升沿於時間t1觸發對多工器MUXA開始進行預充電且多工器MUXA於時間t1接收的是第一電壓準位VGL；接著，多工器MUXA於晚於時間t1的特定時間tx接收的是高於第一電壓準位VGL的特定電壓準位Vx；然後，多工器MUXA於晚於特定時間tx的時間t2接收的是高於特定電壓準位Vx的第三電壓準位VGH。於實際應用中，特定時間tx係介於時間t1與t2之間；特定電壓準位Vx係介於第一電壓準位VGL與第三電壓準位VGH之間，例如第二電壓準位GND，但不以此為限。 As shown in FIG. 10, if the multiplexer MUXA is used as an example, the rising edge of the first timing control signal SWA (SWA is the in-phase voltage amplification signal of the multiplexer MUXA, so it is not marked) triggers the multiplexing at time t1. The MUXA starts pre-charging and the multiplexer MUXA receives the first voltage level VGL at time t1; then, the multiplexer MUXA receives higher than the first voltage level VGL at a specific time tx later than time t1 Then, the multiplexer MUXA receives the third voltage level VGH higher than the specific voltage level Vx at time t2 later than the specific time tx. In practical applications, the specific time tx is between the times t1 and t2; the specific voltage level Vx is between the first voltage level VGL and the third voltage level VGH, such as the second voltage level GND, But not limited to this.

需說明的是，多工器MUXA從特定時間tx之特定電壓準位Vx上升至時間t2之第三電壓準位VGH的速度會大於多工器MUXA從時間t1之第一電壓準位VGL上升至特定時間tx之特定電壓準位Vx的速度。 It should be noted that the speed of the multiplexer MUXA rising from the specific voltage level Vx at the specific time tx to the third voltage level VGH at the time t2 will be faster than the multiplexer MUXA rising from the first voltage level VGL at the time t1 to The speed of the specific voltage level Vx at a specific time tx.

也就是說，假設從時間t1至特定時間tx的時間長度等 於從特定時間tx至時間t2的時間長度，亦即特定時間tx=(時間t1+時間t2)/2，則特定電壓準位Vx與第三電壓準位VGH之間的電壓差會大於第一電壓準位VGL與特定電壓準位Vx之間的電壓差；假設特定電壓準位Vx與第三電壓準位VGH之間的電壓差等於第一電壓準位與特定電壓準位Vx之間的電壓差，亦即特定電壓準位Vx=(第一電壓準位VGL+第三電壓準位VGH)/2，則從時間t1至特定時間tx的時間長度會大於從特定時間tx至時間t2的時間長度。 That is to say, the length of time from time t1 to a specific time tx, etc. During the period from the specific time tx to the time t2, that is, the specific time tx=(time t1+time t2)/2, the voltage difference between the specific voltage level Vx and the third voltage level VGH will be greater than the first voltage The voltage difference between the level VGL and the specific voltage level Vx; it is assumed that the voltage difference between the specific voltage level Vx and the third voltage level VGH is equal to the voltage difference between the first voltage level and the specific voltage level Vx That is, the specific voltage level Vx=(first voltage level VGL+third voltage level VGH)/2, then the length of time from the time t1 to the specific time tx will be greater than the length of time from the specific time tx to the time t2.

由上述可知：在時間t1至時間t2的這段對多工器MUXA進行預充電的期間內，部分開啟的多工器MUXA所接收到的電壓準位係呈現一種指數型上升，因此，部分開啟的多工器MUXA會從時間t1開始以指數型預充電曲線對顯示面板的資料線進行預充電，直至多工器MUXA於時間t2完全開啟為止。 It can be seen from the above that during the period from time t1 to time t2 that pre-charges the multiplexer MUXA, the voltage level received by the partially turned on multiplexer MUXA shows an exponential rise, therefore, the partially turned on The multiplexer MUXA will precharge the data line of the display panel with an exponential precharge curve from time t1 until the multiplexer MUXA is fully turned on at time t2.

於實際應用中，本發明中之特定時間tx與特定電壓準位Vx之數目均可以是一個或多個，並不以上述實施例中之單一時間與單一電壓準位為限。 In practical applications, the number of the specific time tx and the specific voltage level Vx in the present invention may be one or more, and are not limited to the single time and single voltage level in the above embodiment.

舉例而言，本發明可藉由圖7中之儲存單元MTP與控制單元CU來控制多工放大單元MOP在介於時間t1至時間t2之間的n個特定時間tx1~txn分別輸出介於第一電壓準位VGL與第三電壓準位VGH之間的n個特定電壓準位Vx1~Vxn，其中n為大於1之正整數，並且第三電壓準位VGH>Vxn>Vx(n-1)>…>Vx1>第一電壓準位VGL，致使電壓準位轉換單元MLS可輸出指數型預充電曲線。 For example, the present invention can control the multiplexing amplifying unit MOP by the storage unit MTP and the control unit CU in FIG. 7 at n specific times tx1~txn between time t1 and time t2, respectively, outputting between N specific voltage levels Vx1~Vxn between a voltage level VGL and a third voltage level VGH, where n is a positive integer greater than 1, and the third voltage level VGH>Vxn>Vx(n-1) >...>Vx1> The first voltage level VGL, so that the voltage level conversion unit MLS can output an exponential precharge curve.

若以多工器MUXA為例，多工器MUXA從特定時間txn 之特定電壓準位Vxn上升至時間t2之第三電壓準位VGH的速度>多工器MUXA從時間tx(n-1)之特定電壓準位Vx(n-1)上升至特定時間txn之特定電壓準位Vxn>…>多工器MUXA從時間t1之第一電壓準位VGL上升至時間tx1之特定電壓準位Vx1。 Take the multiplexer MUXA as an example, the multiplexer MUXA starts from a specific time txn The speed at which the specific voltage level Vxn rises to the third voltage level VGH at time t2> The multiplexer MUXA rises from the specific voltage level Vx(n-1) at time tx(n-1) to the specific time txn The voltage level Vxn>...> the multiplexer MUXA rises from the first voltage level VGL at time t1 to the specific voltage level Vx1 at time tx1.

也就是說，假設從時間t1至特定時間tx1的時間長度=從特定時間tx1至特定時間tx2的時間長度=…=從特定時間txn至時間t2的時間長度，則特定電壓準位Vxn與第三電壓準位VGH之間的電壓差>特定電壓準位Vx(n-1)與特定電壓準位Vxn之間的電壓差>…>第一電壓準位VGL與特定電壓準位Vx1之間的電壓差；假設特定電壓準位Vxn與第三電壓準位VGH之間的電壓差=特定電壓準位Vx(n-1)與特定電壓準位Vxn之間的電壓差=…=第一電壓準位VGL與特定電壓準位Vx1之間的電壓差，則從時間t1至特定時間tx1的時間長度>從特定時間tx1至特定時間tx2的時間長度>…>從特定時間txn至時間t2的時間長度。 In other words, assuming that the time length from time t1 to a specific time tx1=the time length from a specific time tx1 to a specific time tx2=...=the time length from a specific time txn to a time t2, then the specific voltage level Vxn and the third The voltage difference between the voltage level VGH>the voltage difference between the specific voltage level Vx(n-1) and the specific voltage level Vxn>...>the voltage between the first voltage level VGL and the specific voltage level Vx1 Difference; assuming the voltage difference between the specific voltage level Vxn and the third voltage level VGH=the voltage difference between the specific voltage level Vx(n-1) and the specific voltage level Vxn=...= the first voltage level The voltage difference between VGL and the specific voltage level Vx1 is the length of time from the time t1 to the specific time tx1>the length of time from the specific time tx1 to the specific time tx2>...>the length of time from the specific time txn to the time t2.

同理，對多工器MUXB進行預充電之情況，還有多工器MUXA~MUXB對顯示面板的資料線進行預放電的情形，均可依此類推，故於此不另行贅述。 In the same way, the case of pre-charging the multiplexer MUXB, as well as the case where the multiplexers MUXA~MUXB pre-discharge the data lines of the display panel, can be deduced by analogy, so I will not repeat them here.

根據本發明之另一較佳具體實施例為一種顯示面板驅動控制方法。於此實施例中，顯示面板驅動控制方法係用以控制源極驅動器輸出透過多工器驅動顯示面板中之複數條資料線。 Another preferred embodiment according to the present invention is a display panel drive control method. In this embodiment, the display panel drive control method is used to control the output of the source driver to drive a plurality of data lines in the display panel through the multiplexer.

請參照圖11，圖11繪示此實施例中之顯示面板驅動控制方法的流程圖。如圖11所示，顯示面板驅動控制方法可包含下 列步驟：步驟S10：於第一時間下，透過時序控制信號啟動對多工器開始進行預充電，其中多工器於第一時間接收第一電壓準位；步驟S12：於第二時間下，多工器接收第二電壓準位，其中第二時間晚於第一時間且第二電壓準位高於第一電壓準位；以及步驟S14：於第三時間下，多工器接收第三電壓準位，其中第三時間係晚於第二時間且第三電壓準位高於第二電壓準位。 Please refer to FIG. 11, which is a flowchart of the display panel driving control method in this embodiment. As shown in FIG. 11, the display panel drive control method may include the following Steps: Step S10: At the first time, start the pre-charging of the multiplexer through the timing control signal, wherein the multiplexer receives the first voltage level at the first time; Step S12: At the second time, The multiplexer receives the second voltage level, wherein the second time is later than the first time and the second voltage level is higher than the first voltage level; and Step S14: at the third time, the multiplexer receives the third voltage level Level, where the third time is later than the second time and the third voltage level is higher than the second voltage level.

需說明的是，多工器由第二時間之第二電壓準位上升至第三時間之第三電壓準位的速度會大於多工器由第一時間之第一電壓準位上升至第二時間之第二電壓準位的速度。也就是說，原本處於關閉狀態的多工器於第一時間接收第一電壓準位而部分開啟，且多工器從第一時間至第三時間所接收到的電壓準位係呈現指數型增加，直至多工器於第三時間接收第三電壓準位而完全開啟為止。 It should be noted that the speed of the multiplexer rising from the second voltage level at the second time to the third voltage level at the third time will be faster than that of the multiplexer rising from the first voltage level at the first time to the second The speed of the second voltage level of time. In other words, the multiplexer that was originally turned off receives the first voltage level and is partially turned on at the first time, and the voltage level received by the multiplexer from the first time to the third time shows an exponential increase Until the multiplexer receives the third voltage level and turns on completely at the third time.

於實際應用中，時序控制信號之上升沿於第一時間亦同時觸發對顯示面板中之該複數條資料線開始進行充電。由於多工器從第一時間至第三時間所接收到的電壓準位係呈現指數型增加，因此，多工器從第一時間開始以指數型預充電曲線對顯示面板的資料線進行預充電，直至多工器於第三時間接收第三電壓準 位而處於完全開啟狀態時，才會停止對顯示面板的資料線進行預充電。 In practical applications, the rising edge of the timing control signal also triggers the charging of the plurality of data lines in the display panel at the same time. Since the voltage level received by the multiplexer from the first time to the third time shows an exponential increase, the multiplexer precharges the data line of the display panel with an exponential precharge curve from the first time Until the multiplexer receives the third voltage quasi at the third time It will stop pre-charging the data cable of the display panel when it is fully turned on.

舉例而言，如圖10所示，第一時序控制信號SWA(SWA為多工器MUXA的同相的電壓放大訊號，所以未標出)的上升沿於時間t1觸發對多工器MUXA開始進行預充電且多工器MUXA於時間t1接收第一電壓準位VGL；接著，多工器MUXA於時間tx接收第二電壓準位Vx，其中時間tx晚於第一時間t1且第二電壓準位Vx高於第一電壓準位VGL；然後，多工器MUXA於時間t2接收第三電壓準位VGH，其中時間t2晚於時間tx且第三電壓準位VGH高於第二電壓準位Vx。由於多工器MUXA由時間tx之第二電壓準位Vx上升至時間t2之第三電壓準位VGH的速度會大於多工器MUXA由時間t1之第一電壓準位VGL上升至時間tx之第二電壓準位Vx的速度，亦即在時間t1至時間t2的預充電期間內，部分開啟的多工器MUXA所接收到的電壓準位係呈現指數型變化，因此，部分開啟的多工器MUXA會從時間t1開始以指數型預充電曲線對顯示面板的資料線進行預充電，直至時間t2為止。 For example, as shown in FIG. 10, the rising edge of the first timing control signal SWA (SWA is the in-phase voltage amplification signal of the multiplexer MUXA, so it is not marked) triggers the start of the multiplexer MUXA at time t1. Precharged and the multiplexer MUXA receives the first voltage level VGL at time t1; then, the multiplexer MUXA receives the second voltage level Vx at time tx, where the time tx is later than the first time t1 and the second voltage level Vx is higher than the first voltage level VGL; then, the multiplexer MUXA receives the third voltage level VGH at time t2, where time t2 is later than time tx and the third voltage level VGH is higher than the second voltage level Vx. Since the multiplexer MUXA rises from the second voltage level Vx at time tx to the third voltage level VGH at time t2, the speed of the multiplexer MUXA rises from the first voltage level VGL at time t1 to the third time tx The speed of the second voltage level Vx, that is, during the precharge period from time t1 to time t2, the voltage level received by the partially-opened multiplexer MUXA exhibits an exponential change. Therefore, the partially-opened multiplexer MUXA will pre-charge the data line of the display panel with an exponential pre-charge curve from time t1 until time t2.

同理，多工器對顯示面板的資料線進行預放電的情形亦可依此類推。承上例，顯示面板驅動控制方法還可包含下列步驟：於第四時間下，觸發多工器開始進行預放電，其中第四時間晚於第三時間且多工器於第四時間接收第三電壓準位；於第五時間下，多工器接收第四電壓準位，其中第五 時間晚於第四時間且第四電壓準位低於第三電壓準位；以及於第六時間下，多工器接收第一電壓準位，其中第六時間晚於第五時間且第一電壓準位低於第四電壓準位。 Similarly, the case where the multiplexer pre-discharges the data line of the display panel can be deduced by analogy. According to the above example, the display panel driving control method may further include the following steps: at the fourth time, trigger the multiplexer to start pre-discharge, wherein the fourth time is later than the third time and the multiplexer receives the third at the fourth time Voltage level; at the fifth time, the multiplexer receives the fourth voltage level, of which the fifth The time is later than the fourth time and the fourth voltage level is lower than the third voltage level; and at the sixth time, the multiplexer receives the first voltage level, where the sixth time is later than the fifth time and the first voltage The level is lower than the fourth voltage level.

同樣地，多工器由第五時間之第四電壓準位下降至第六時間之第一電壓準位的速度會大於多工器由第四時間之第三電壓準位下降至第五時間之第四電壓準位的速度，亦即多工器於第四時間至第六時間所接收到的電壓準位係呈現指數型減少。 Similarly, the speed of the multiplexer falling from the fourth voltage level at the fifth time to the first voltage level at the sixth time will be greater than that of the multiplexer falling from the third voltage level at the fourth time to the fifth time The speed of the fourth voltage level, that is, the voltage level received by the multiplexer from the fourth time to the sixth time, shows an exponential decrease.

相較於先前技術，於本發明的電壓準位轉換電路及顯示面板驅動控制方法中，時序控制信號的上升沿除了觸發源極驅動器輸出開始輸出資料信號對扇出單元充電之外，亦同時觸發多工器部分開啟而開始以指數型預充電曲線對顯示面板的資料線預充電一段時間後再完全開啟多工器對資料線充電。 Compared with the prior art, in the voltage level conversion circuit and the display panel driving control method of the present invention, the rising edge of the timing control signal triggers the source driver output to start outputting the data signal to charge the fan-out unit, and also triggers The multiplexer is partially turned on and starts to precharge the data line of the display panel with an exponential precharge curve for a period of time, and then fully turns on the multiplexer to charge the data line.

由於本發明在完全開啟多工器對顯示面板的資料線充電之前，會先部分開啟多工器對顯示面板的資料線預充電，不僅可延長資料線的有效充電時間並使資料線之充電變得較線性，亦可降低完全開啟多工器時之資料線的瞬間電流並避免電壓下降的現象出現。 Since the present invention fully opens the multiplexer to precharge the data line of the display panel before fully opening the multiplexer to charge the data line of the display panel, not only can the effective charging time of the data line be prolonged and the charging of the data line can be changed Being more linear, it can also reduce the instantaneous current of the data line when the multiplexer is fully turned on and avoid the phenomenon of voltage drop.

因此，本發明的電壓準位轉換電路及顯示面板驅動控制方法能夠有效提升顯示面板的畫素充電率並大幅消除觸控面板雜訊，使得觸控筆能夠順利在觸控面板上操作。 Therefore, the voltage level conversion circuit and the display panel driving control method of the present invention can effectively improve the pixel charging rate of the display panel and greatly eliminate the noise of the touch panel, so that the stylus can operate on the touch panel smoothly.

由以上較佳具體實施例之詳述，係希望能更加清楚描述本發明之特徵與精神，而並非以上述所揭露的較佳具體實施 例來對本發明之範疇加以限制。相反地，其目的是希望能涵蓋各種改變及具相等性的安排於本發明所欲申請之專利範圍的範疇內。藉由以上較佳具體實施例之詳述，係希望能更加清楚描述本發明之特徵與精神，而並非以上述所揭露的較佳具體實施例來對本發明之範疇加以限制。相反地，其目的是希望能涵蓋各種改變及具相等性的安排於本發明所欲申請之專利範圍的範疇內。 From the detailed description of the above preferred embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, rather than the preferred embodiments disclosed above By way of example, the scope of the present invention is limited. On the contrary, the purpose is to cover various changes and equivalent arrangements within the scope of the patent application of the present invention. With the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, rather than limiting the scope of the present invention with the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and equivalent arrangements within the scope of the patent application of the present invention.

S10~S14‧‧‧步驟 S10~S14‧‧‧Step

Claims (20)

一種顯示面板驅動控制方法，用以透過一多工器驅動一顯示面板中之複數條資料線，該顯示面板驅動控制方法包含下列步驟：(a)於一第一時間下，透過一時序控制信號啟動對該多工器開始進行預充電，其中該多工器於該第一時間係接收一第一電壓準位；(b)於一第二時間下，該多工器接收一第二電壓準位，其中該第二時間係晚於該第一時間且該第二電壓準位高於該第一電壓準位；以及(c)於一第三時間下，該多工器接收一第三電壓準位，其中該第三時間係晚於該第二時間且該第三電壓準位高於該第二電壓準位；其中，該多工器由該第二時間之該第二電壓準位上升至該第三時間之該第三電壓準位的速度大於該多工器由該第一時間之該第一電壓準位上升至該第二時間之該第二電壓準位的速度。 A display panel drive control method for driving a plurality of data lines in a display panel through a multiplexer, the display panel drive control method includes the following steps: (a) at a first time, through a timing control signal Start pre-charging the multiplexer, wherein the multiplexer receives a first voltage level at the first time; (b) at a second time, the multiplexer receives a second voltage level Bit, where the second time is later than the first time and the second voltage level is higher than the first voltage level; and (c) at a third time, the multiplexer receives a third voltage Level, wherein the third time is later than the second time and the third voltage level is higher than the second voltage level; wherein, the multiplexer rises from the second voltage level at the second time The speed of the third voltage level to the third time is greater than the speed of the multiplexer rising from the first voltage level of the first time to the second voltage level of the second time. 如申請專利範圍第1項所述之顯示面板驅動控制方法，其中步驟(a)係根據該時序控制信號之一上升沿(Rising edge)觸發對該多工器進行預充電。 The display panel driving control method as described in item 1 of the patent application scope, wherein step (a) is to trigger pre-charging of the multiplexer according to a rising edge of the timing control signal. 如申請專利範圍第1項所述之顯示面板驅動控制方法，其中步驟(c)還包含：當該多工器接收該第三電壓準位時，停止對該多工器進行預充電。 The display panel driving control method as described in item 1 of the patent application scope, wherein step (c) further includes: when the multiplexer receives the third voltage level, stopping pre-charging the multiplexer. 如申請專利範圍第1項所述之顯示面板驅動控制方法，其中該多工器於該第一時間係處於關閉狀態。 The display panel driving control method as described in item 1 of the patent application range, wherein the multiplexer is in the off state at the first time. 如申請專利範圍第1項所述之顯示面板驅動控制方法，其中該多 工器於該第二時間係處於部分開啟狀態。 The display panel drive control method as described in item 1 of the patent application The tool is in a partially open state at this second time. 如申請專利範圍第1項所述之顯示面板驅動控制方法，其中該多工器於該第三時間係處於完全開啟狀態。 The display panel driving control method as described in item 1 of the patent application scope, wherein the multiplexer is in a fully-on state at the third time. 如申請專利範圍第1項所述之顯示面板驅動控制方法，進一步包含下列步驟：(d)於該第一時間下，根據該時序控制信號亦同時觸發對該複數條資料線開始進行充電。 The display panel driving control method as described in item 1 of the patent application scope further includes the following steps: (d) at the first time, according to the timing control signal, it also triggers the charging of the plurality of data lines at the same time. 如申請專利範圍第7項所述之顯示面板驅動控制方法，其中步驟(d)係根據該時序控制信號之該上升沿觸發啟動對該複數條資料線開始進行充電。 The display panel driving control method as described in item 7 of the patent application scope, wherein step (d) triggers the start of charging the plurality of data lines according to the rising edge of the timing control signal. 如申請專利範圍第1項所述之顯示面板驅動控制方法，進一步包含下列步驟：於一第四時間下，觸發該多工器開始進行預放電，其中該第四時間係晚於該第三時間且該多工器於該第四時間接收該第三電壓準位；於一第五時間下，該多工器接收一第四電壓準位，其中該第五時間係晚於該第四時間且該第四電壓準位低於該第三電壓準位；以及於一第六時間下，該多工器接收該第一電壓準位，其中該第六時間係晚於該第五時間且該第一電壓準位低於該第四電壓準位。 The display panel driving control method as described in item 1 of the patent application scope further includes the following steps: triggering the multiplexer to start pre-discharge at a fourth time, wherein the fourth time is later than the third time And the multiplexer receives the third voltage level at the fourth time; at a fifth time, the multiplexer receives a fourth voltage level, where the fifth time is later than the fourth time and The fourth voltage level is lower than the third voltage level; and at a sixth time, the multiplexer receives the first voltage level, wherein the sixth time is later than the fifth time and the first A voltage level is lower than the fourth voltage level. 如申請專利範圍第9項所述之顯示面板驅動控制方法，其中該多工器由該第五時間之該第四電壓準位下降至該第六時間之該第一電壓準位的速度大於該多工器由該第四時間之該第三電壓準位下降至該第五時間之該第四電壓準位的速度。 The display panel driving control method as described in item 9 of the patent application range, wherein the speed of the multiplexer falling from the fourth voltage level at the fifth time to the first voltage level at the sixth time is greater than that The speed of the multiplexer decreases from the third voltage level at the fourth time to the fourth voltage level at the fifth time. 一種電壓準位轉換電路，透過一多工器耦接一顯示面板中之複數條資料線，該電壓準位轉換電路包含：一電壓準位轉換單元，耦接該多工器並分別接收一第一電壓準位、一第二電壓準位及一第三電壓準位，其中該第三電壓準位高於該第二電壓準位且該第二電壓準位高於該第一電壓準位；以及一控制單元，耦接該電壓準位轉換單元，用以根據一時序控制信號之一電壓準位選擇性地控制該電壓準位轉換單元輸出該第一電壓準位或該第二電壓準位至該多工器。 A voltage level conversion circuit is coupled to a plurality of data lines in a display panel through a multiplexer. The voltage level conversion circuit includes: a voltage level conversion unit, which is coupled to the multiplexer and receives a first A voltage level, a second voltage level and a third voltage level, wherein the third voltage level is higher than the second voltage level and the second voltage level is higher than the first voltage level; And a control unit coupled to the voltage level conversion unit for selectively controlling the voltage level conversion unit to output the first voltage level or the second voltage level according to a voltage level of a timing control signal To the multiplexer. 如申請專利範圍第11項所述之電壓準位轉換電路，其中當該時序控制信號之該電壓準位為低準位時，該控制單元控制該電壓準位轉換單元輸出該第一電壓準位至該多工器。 The voltage level conversion circuit as described in item 11 of the patent application range, wherein when the voltage level of the timing control signal is a low level, the control unit controls the voltage level conversion unit to output the first voltage level To the multiplexer. 如申請專利範圍第11項所述之電壓準位轉換電路，其中當該時序控制信號之該電壓準位為高準位時，該控制單元控制該電壓準位轉換單元輸出該第二電壓準位至該多工器，以對該多工器進行預充電。 The voltage level conversion circuit as described in item 11 of the patent application range, wherein when the voltage level of the timing control signal is a high level, the control unit controls the voltage level conversion unit to output the second voltage level To the multiplexer to pre-charge the multiplexer. 如申請專利範圍第13項所述之電壓準位轉換電路，還包含：一回授單元，分別耦接該多工器及該控制單元，用以判斷進行預充電之該多工器是否達到一參考電壓；其中，若上述判斷結果為是，則該控制單元控制該電壓準位轉換單元輸出該第三電壓準位至該多工器。 The voltage level conversion circuit as described in item 13 of the patent application scope further includes: a feedback unit, respectively coupled to the multiplexer and the control unit, for judging whether the multiplexer for precharging has reached a Reference voltage; wherein, if the above determination result is yes, the control unit controls the voltage level conversion unit to output the third voltage level to the multiplexer. 如申請專利範圍第11項所述之電壓準位轉換電路，還包含：一儲存單元，耦接該控制單元，用以儲存一預設資訊；其中，當該時序控制信號之該電壓準位為高準位時，該控制單元根據該預設資訊於一預設時間內控制該電壓準位轉換單元輸 出該第二電壓準位至該多工器，以對該多工器進行預充電，當該預設時間結束時，該控制單元控制該電壓準位轉換單元輸出該第三電壓準位至該多工器。 The voltage level conversion circuit as described in item 11 of the patent application scope further includes: a storage unit coupled to the control unit for storing a preset information; wherein, when the voltage level of the timing control signal is When the level is high, the control unit controls the voltage level conversion unit to output The second voltage level is sent to the multiplexer to precharge the multiplexer. When the preset time ends, the control unit controls the voltage level conversion unit to output the third voltage level to the multiplexer Multiplexer. 如申請專利範圍第15項所述之電壓準位轉換電路，其中該儲存單元為多次性可編程(Multi-Time Programming,MTP)電路。 The voltage level conversion circuit as described in item 15 of the patent application range, wherein the storage unit is a multi-time programming (MTP) circuit. 一種電壓準位轉換電路，透過一多工器耦接一顯示面板中之複數條資料線，該電壓準位轉換電路包含：一分壓單元，分別接收一第一電壓準位、一第二電壓準位及一第三電壓準位並據以產生複數個候選電壓準位，其中該第三電壓準位高於該第二電壓準位且該第二電壓準位高於該第一電壓準位；一電壓準位轉換單元，分別耦接該多工器及該分壓單元，用以接收該複數個候選電壓準位；以及一控制單元，耦接該電壓準位轉換單元，用以根據一時序控制信號之一電壓準位選擇性地控制該電壓準位轉換單元輸出該複數個候選電壓準位至該多工器。 A voltage level conversion circuit is coupled to a plurality of data lines in a display panel through a multiplexer. The voltage level conversion circuit includes: a voltage dividing unit, which respectively receives a first voltage level and a second voltage And a third voltage level to generate a plurality of candidate voltage levels, wherein the third voltage level is higher than the second voltage level and the second voltage level is higher than the first voltage level A voltage level conversion unit, respectively coupled to the multiplexer and the voltage divider unit, for receiving the plurality of candidate voltage levels; and a control unit, coupled to the voltage level conversion unit, for time One voltage level of the sequence control signal selectively controls the voltage level conversion unit to output the plurality of candidate voltage levels to the multiplexer. 如申請專利範圍第17項所述之電壓準位轉換電路，其中該電壓準位轉換單元包含複數個運算放大器，該控制單元還輸出一推力控制信號至該電壓準位轉換單元，藉以控制該複數個運算放大器提供相對應之推力輸出該複數個候選電壓準位至該多工器，致使該複數個候選電壓準位形成一指數型預充電曲線。 The voltage level conversion circuit as described in item 17 of the patent application range, wherein the voltage level conversion unit includes a plurality of operational amplifiers, and the control unit also outputs a thrust control signal to the voltage level conversion unit to control the complex number Each operational amplifier provides corresponding thrust to output the plurality of candidate voltage levels to the multiplexer, so that the plurality of candidate voltage levels form an exponential precharge curve. 如申請專利範圍第17項所述之電壓準位轉換電路，還包含：一儲存單元，耦接該控制單元，用以儲存一預設資訊；其中，當該時序控制信號之該電壓準位為高準位時，該控制單元根據該預設資訊於至少一預設時間內控制該電壓準位轉換單 元分別輸出該至少一候選電壓準位至該多工器，以對該多工器進行預充電，當該至少一預設時間結束時，該控制單元控制該電壓準位轉換單元輸出該第三電壓準位至該多工器。 The voltage level conversion circuit as described in Item 17 of the patent application scope further includes: a storage unit coupled to the control unit for storing a preset information; wherein, when the voltage level of the timing control signal is When the level is high, the control unit controls the voltage level conversion unit for at least a preset time according to the preset information The unit outputs the at least one candidate voltage level to the multiplexer to pre-charge the multiplexer, and when the at least a preset time ends, the control unit controls the voltage level conversion unit to output the third The voltage level is to the multiplexer. 如申請專利範圍第19項所述之電壓準位轉換電路，其中該儲存單元為多次性可編程電路。 The voltage level conversion circuit as described in Item 19 of the patent application range, wherein the storage unit is a multi-time programmable circuit.
TW107136407A 2018-10-16 2018-10-16 Voltage level shifter cirucit and display panel driving control method TWI680394B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW107136407A TWI680394B (en) 2018-10-16 2018-10-16 Voltage level shifter cirucit and display panel driving control method
CN201811588326.5A CN109410822B (en) 2018-10-16 2018-12-25 Voltage level conversion circuit and display panel drive control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW107136407A TWI680394B (en) 2018-10-16 2018-10-16 Voltage level shifter cirucit and display panel driving control method

Publications (2)

Publication Number Publication Date
TWI680394B TWI680394B (en) 2019-12-21
TW202016705A true TW202016705A (en) 2020-05-01

Family

ID=65461291

Family Applications (1)

Application Number Title Priority Date Filing Date
TW107136407A TWI680394B (en) 2018-10-16 2018-10-16 Voltage level shifter cirucit and display panel driving control method

Country Status (2)

Country Link
CN (1) CN109410822B (en)
TW (1) TWI680394B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11508302B2 (en) 2020-11-06 2022-11-22 Novatek Microelectronics Corp. Method for driving display panel and related driver circuit
TWI800106B (en) * 2021-11-22 2023-04-21 友達光電股份有限公司 Multiplexer circuit, display panel and driving method using the same

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI758600B (en) 2019-04-09 2022-03-21 友達光電股份有限公司 Display panel and display panel driving method
CN110930923B (en) * 2019-11-27 2022-09-27 Tcl华星光电技术有限公司 Display panel driving circuit
KR20210083637A (en) * 2019-12-27 2021-07-07 엘지디스플레이 주식회사 Display apparatus
TWI734553B (en) * 2020-07-13 2021-07-21 友達光電股份有限公司 Display panel
WO2023044719A1 (en) * 2021-09-24 2023-03-30 京东方科技集团股份有限公司 Fingerprint recognition substrate, electronic device, and fingerprint recognition method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100607518B1 (en) * 2004-02-20 2006-08-02 엘지전자 주식회사 Electro-luminescensce dispaly panel and method for driving the same
CN100573635C (en) * 2006-09-29 2009-12-23 胜华科技股份有限公司 Active display and driving method thereof with de-multiplexer
KR102001047B1 (en) * 2012-07-12 2019-07-18 삼성디스플레이 주식회사 Method of driving a display panel and display panel driving apparatus for performing the method
KR102034061B1 (en) * 2013-06-29 2019-11-08 엘지디스플레이 주식회사 Liquid crystal display device
JP6231314B2 (en) * 2013-07-16 2017-11-15 シナプティクス・ジャパン合同会社 Display drive device
TWI579823B (en) * 2016-02-22 2017-04-21 友達光電股份有限公司 Display device and driving circuit thereof
TWI576812B (en) * 2016-04-15 2017-04-01 友達光電股份有限公司 Pixel driving circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11508302B2 (en) 2020-11-06 2022-11-22 Novatek Microelectronics Corp. Method for driving display panel and related driver circuit
TWI793844B (en) * 2020-11-06 2023-02-21 聯詠科技股份有限公司 Method for driving display panel and related driver circuit
TWI800106B (en) * 2021-11-22 2023-04-21 友達光電股份有限公司 Multiplexer circuit, display panel and driving method using the same

Also Published As

Publication number Publication date
CN109410822B (en) 2021-09-03
TWI680394B (en) 2019-12-21
CN109410822A (en) 2019-03-01

Similar Documents

Publication Publication Date Title
TWI680394B (en) Voltage level shifter cirucit and display panel driving control method
KR102446050B1 (en) Scan driver and organic light emitting display device having the same
KR100673903B1 (en) Semiconductor memory device having bit line over driving scheme and method for driving bit line sense amplifier thereof
US20070220388A1 (en) Apparatus and method for adjusting an operating parameter of an integrated circuit
US7596035B2 (en) Memory device bit line sensing system and method that compensates for bit line resistance variations
US10854265B2 (en) Time tracking circuit for FRAM
JP5809595B2 (en) Semiconductor memory device and operation method of semiconductor memory device
KR20150140042A (en) Word Line Driver Circuit and Resistance Variable Memory Apparatus Having the Same
US9633744B2 (en) On demand knockout of coarse sensing based on dynamic source bounce detection
US20190057747A1 (en) Flash memory storage apparatus and reading method thereof
US8649231B2 (en) Semiconductor memory device with delay circuit and sense amplifier circuit
US20050122810A1 (en) Methods and systems for dynamically selecting word line off times and/or bit line equalization start times in memory devices
US20160343433A1 (en) Sensing circuit for resistive memory array
US9478262B2 (en) Semiconductor device including input/output circuit
JPS63271798A (en) Erasable programmable logic device
KR100780633B1 (en) Over driver control signal generator in semiconductor memory device
US10192611B1 (en) Sensing circuit, set of pre-amplifiers, and operating method thereof
US6927994B2 (en) Ferroelectric memory device
KR102341230B1 (en) Semiconductor apparatus for reading stored information of resistor or cell
US6940770B2 (en) Method for precharging word and bit lines for selecting memory cells within a memory array
US8416631B2 (en) Internal voltage generator circuit and semiconductor memory device using the same
JPH03224200A (en) Semiconductor storage device
US7218564B2 (en) Dual equalization devices for long data line pairs
CN108962324B (en) Memory storage device
JP2019057347A (en) Resistance change memory device