TWI660336B - Display device and gate driver circuit - Google Patents
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- 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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Abstract
本發明一種顯示裝置，包括一顯示陣列及一閘極驅動電路。顯示陣列包括多條掃描線、多條資料線及多個畫素單元。閘極驅動電路包括多級驅動單元。驅動單元的數量大於掃描線的數量。驅動單元包括多個驅動訊號輸出單元及多個虛設單元。驅動訊號輸出單元的其中之一與驅動訊號輸出單元的其中另一之間耦接虛設單元的至少其中之一。各驅動訊號輸出單元的輸出端耦接至各驅動訊號輸出單元的一下一級驅動單元及掃描線的其中之一。各虛設單元的輸出端耦接至各虛設單元的一下一級驅動單元。 A display device of the present invention includes a display array and a gate driving circuit. The display array includes multiple scan lines, multiple data lines, and multiple pixel units. The gate driving circuit includes a multi-stage driving unit. The number of driving units is greater than the number of scanning lines. The driving unit includes a plurality of driving signal output units and a plurality of dummy units. At least one of the dummy units is coupled between one of the driving signal output units and the other of the driving signal output units. The output terminal of each driving signal output unit is coupled to one of the next-level driving unit and the scanning line of each driving signal output unit. An output terminal of each dummy unit is coupled to a next-level driving unit of each dummy unit.
Description
本發明是有關於一種顯示裝置及閘極驅動電路。 The invention relates to a display device and a gate driving circuit.
現代人的生活中充滿各式各樣的電子產品，這些功能不盡相同的的電子產品中，有很大一部分，諸如電腦、手機、相機、電視等，都需要具備有一或多個顯示裝置，用來顯示影像、影片、使用者介面或其他資訊。 Modern people's lives are full of various electronic products. A large part of these electronic products with different functions, such as computers, mobile phones, cameras, televisions, etc., need to have one or more display devices. Used to display images, videos, user interfaces, or other information.
鑿於這樣的需求，顯示技術從陰極射線管開始不斷地演進，到液晶顯示器、電漿顯示器，再到現在的發光二極體顯示器，業界對於顯示技術的研究與開發也從未止息。 Based on this demand, display technology has continued to evolve from cathode ray tubes, to liquid crystal displays, plasma displays, and now to light emitting diode displays. The industry's research and development of display technology has never stopped.
本發明的目的是提供一種顯示裝置及閘極驅動電路。 An object of the present invention is to provide a display device and a gate driving circuit.
本發明實施例係揭露一種顯示裝置，包括一顯示陣列及一閘極驅動電路。顯示陣列包括多條掃描線、多條資料線及多個畫素單元。掃描線與資料線交錯設置，畫素單元耦接至掃描線與資料線。閘極驅動電路包括多級驅動單元。驅動單元的數量係大於掃描線的數量。驅動單元包括多個驅動訊號輸出單元及多個虛設單元。驅動訊號輸出單元的其中之一與驅動訊號輸出單元 的其中另一之間耦接虛設單元的至少其中之一。各驅動訊號輸出單元的輸出端耦接至各驅動訊號輸出單元的一下一級驅動單元及掃描線的其中之一。各虛設單元的輸出端耦接至各虛設單元的一下一級驅動單元。 An embodiment of the present invention discloses a display device including a display array and a gate driving circuit. The display array includes multiple scan lines, multiple data lines, and multiple pixel units. The scanning lines and the data lines are arranged alternately, and the pixel unit is coupled to the scanning lines and the data lines. The gate driving circuit includes a multi-stage driving unit. The number of driving units is larger than the number of scanning lines. The driving unit includes a plurality of driving signal output units and a plurality of dummy units. One of the driving signal output unit and the driving signal output unit At least one of the dummy units is coupled between the other. The output terminal of each driving signal output unit is coupled to one of the next-level driving unit and the scanning line of each driving signal output unit. An output terminal of each dummy unit is coupled to a next-level driving unit of each dummy unit.
本發明實施例係揭露一種閘極驅動電路包括多級驅動單元。驅動單元的數量係大於一顯示陣列的複數條掃描線的數量。驅動單元包括多個驅動訊號輸出單元及多個虛設單元。驅動訊號輸出單元的其中之一與驅動訊號輸出單元的其中另一之間耦接虛設單元的至少其中之一。各驅動訊號輸出單元的輸出端耦接至各驅動訊號輸出單元的一下一級驅動單元及該些掃描線的其中之一。各虛設單元的輸出端耦接至各虛設單元的一下一級驅動單元。 An embodiment of the present invention discloses a gate driving circuit including a multi-stage driving unit. The number of driving units is greater than the number of the plurality of scan lines of a display array. The driving unit includes a plurality of driving signal output units and a plurality of dummy units. At least one of the dummy units is coupled between one of the driving signal output units and the other of the driving signal output units. An output terminal of each driving signal output unit is coupled to one of the next-level driving units and one of the scanning lines of each driving signal output unit. An output terminal of each dummy unit is coupled to a next-level driving unit of each dummy unit.
依據本發明的顯示裝置及閘極驅動電路能夠提供適合使用者直視的整體亮度。 The display device and the gate driving circuit according to the present invention can provide overall brightness suitable for direct viewing by a user.
為了對本發明之上述及其他方面有更佳的瞭解，下文特舉實施例，並配合所附圖式詳細說明如下： In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are described in detail below in conjunction with the accompanying drawings:
1‧‧‧顯示裝置 1‧‧‧ display device
10‧‧‧顯示陣列 10‧‧‧ display array
12‧‧‧閘極驅動電路 12‧‧‧Gate driving circuit
122_1~122_k‧‧‧驅動單元 122_1 ~ 122_k‧‧‧Drive unit
A1~Am‧‧‧驅動訊號輸出單元 A1 ~ Am‧‧‧Drive signal output unit
B‧‧‧虛設單元 B‧‧‧ dummy unit
DL1~DLn‧‧‧資料線 DL1 ~ DLn‧‧‧Data Line
SL1~SLm‧‧‧掃描線 SL1 ~ SLm‧‧‧Scan line
P11~Pmn‧‧‧畫素單元 P11 ~ Pmn‧‧‧Pixel Unit
221‧‧‧輸入子單元 221‧‧‧ input subunit
223‧‧‧下拉子單元 223‧‧‧drop-down subunit
225‧‧‧輸出子單元 225‧‧‧ output subunit
第1圖繪示依據本發明一實施例的顯示裝置的簡化電路方塊圖；第2圖繪示驅動電路的簡化電路方塊圖；第3圖繪示閘極驅動電路的訊號時序圖；以及 第4~6圖繪示第一模式及第二模式下掃描訊號及資料訊號的波形示意圖。 FIG. 1 is a simplified circuit block diagram of a display device according to an embodiment of the present invention; FIG. 2 is a simplified circuit block diagram of a driving circuit; FIG. 3 is a signal timing diagram of a gate driving circuit; Figures 4 ~ 6 show the waveforms of the scanning signal and data signal in the first mode and the second mode.
請參照第1圖，第1圖繪示依據本發明一實施例的顯示裝置的簡化方塊圖。顯示裝置1例如設置於或連接於個人電腦、平板電腦、個人數位助理、手機、相機及電視等電子產品。顯示裝置1包括一顯示陣列10以及閘極驅動電路12。 Please refer to FIG. 1. FIG. 1 illustrates a simplified block diagram of a display device according to an embodiment of the present invention. The display device 1 is installed or connected to electronic products such as a personal computer, a tablet computer, a personal digital assistant, a mobile phone, a camera, and a television. The display device 1 includes a display array 10 and a gate driving circuit 12.
顯示陣列10包括多條掃描線SL1~SLm、多條資料線DL1~DLn以及多個畫素單元P11~Pmn，其中m、n分別代表掃描線及資料線的數量，且m、n皆為正整數。在本實施例中，掃描線SL1~SLm之間相互平行，資料線DL1~DLn之間相互平行，且資料線DL1~DLn係垂直於掃描線SL1~SLm。畫素單元P11~Pmn分別設置於掃描線SL1~SLm與資料線DL1~DLn的交錯處，且各畫素單元P11~Pmn係耦接至對應的掃描線及資料線。舉例來說，畫素單元P11係耦接至掃描線SL1與資料線DL1；畫素單元Pmn係耦接至掃描線SLm與資料線DLn，以此類推。畫素單元P11~Pmn可包括任意適合應用本發明的發光元件，例如發光二極體(light emitting diode,LED)、有機發光二極體(organic light emitting diode,OLED)、微發光二極體(micro-LED)等。 The display array 10 includes a plurality of scan lines SL1 to SLm, a plurality of data lines DL1 to DLn, and a plurality of pixel units P11 to Pmn, where m and n represent the number of scan lines and data lines, respectively, and m and n are positive. Integer. In this embodiment, the scan lines SL1 to SLm are parallel to each other, the data lines DL1 to DLn are parallel to each other, and the data lines DL1 to DLn are perpendicular to the scan lines SL1 to SLm. The pixel units P11 to Pmn are respectively disposed at the intersections of the scanning lines SL1 to SLm and the data lines DL1 to DLn, and the pixel units P11 to Pmn are coupled to the corresponding scanning lines and data lines. For example, the pixel unit P11 is coupled to the scan line SL1 and the data line DL1; the pixel unit Pmn is coupled to the scan line SLm and the data line DLn, and so on. The pixel units P11 to Pmn may include any light emitting element suitable for applying the present invention, such as a light emitting diode (LED), an organic light emitting diode (OLED), and a micro light emitting diode ( micro-LED) and so on.
閘極驅動電路12耦接至掃描線SL1~SLm。閘極驅動電路12包括多級驅動單元122_1~122_k，其中k為正整數，且k大於m。換言之，閘極驅動電路12的驅動單元的數量會大於顯示陣列10的掃描線的數量。出於說明的目的，第1圖中所顯示的驅動單元122_1~122_k係由 上至下依序被指定為第一級驅動單元122_1到第k級驅動單元122_k。此些驅動單元122_1~122_k包括多個驅動訊號輸出單元A1~Am以及多個虛設(dummy)單元B，其中驅動訊號輸出單元A1~Am的數量係相同於掃描線SL1~SLm的數量。在本實施例中，虛設單元B的數量係相同於驅動訊號輸出單元A1~Am的數量，然在其他實施例中，虛設單元B的數量則可依據需要而有不同的設計，本發明不加以限制。在其中一個驅動訊號輸出單元與另一個驅動訊號輸出單元之間設置有至少一個虛設單元B。更明確來說，在其中一個驅動訊號輸出單元以及與其最接近的另一個驅動訊號輸出單元之間設置有至少一個虛設單元B。各驅動訊號輸出單元A1~Am的輸出端耦接至各驅動訊號輸出單元A1~Am的下一級驅動單元以及掃描線SL1~SLm的其中之一。各虛設單元B的輸出端耦接至各虛設單元B的下一級驅動單元。 The gate driving circuit 12 is coupled to the scan lines SL1 to SLm. The gate driving circuit 12 includes multi-level driving units 122_1 to 122_k, where k is a positive integer, and k is greater than m. In other words, the number of driving units of the gate driving circuit 12 is greater than the number of scanning lines of the display array 10. For illustration purposes, the drive units 122_1 ~ 122_k shown in Figure 1 are From top to bottom, the first-level driving unit 122_1 to the k-th driving unit 122_k are sequentially designated. The driving units 122_1 to 122_k include a plurality of driving signal output units A1 to Am and a plurality of dummy units B. The number of driving signal output units A1 to Am is the same as the number of scanning lines SL1 to SLm. In this embodiment, the number of dummy units B is the same as the number of driving signal output units A1 to Am. However, in other embodiments, the number of dummy units B may be differently designed according to needs. limit. At least one dummy unit B is provided between one of the driving signal output units and the other driving signal output unit. More specifically, at least one dummy unit B is provided between one of the driving signal output units and the other driving signal output unit closest to the driving signal output unit. The output terminals of the driving signal output units A1 to Am are coupled to one of the driving units of the next level of the driving signal output units A1 to Am and one of the scan lines SL1 to SLm. An output terminal of each dummy unit B is coupled to a next-level driving unit of each dummy unit B.
如第1圖所示，在本實施例中，第一級驅動單元122_1係為驅動訊號輸出單元A1，驅動訊號輸出單元A1的輸出端係耦接至第二級驅動單元122_2以及對應的掃描線SL1；第二級驅動單元122_2係為虛設單元B，虛設單元B的輸出端係耦接至第三級驅動單元122_3；第三級驅動單元122_3係為驅動訊號輸出單元A2，驅動訊號輸出單元A2的輸出端係耦接至第四級驅動單元122_4以及對應的掃描線SL2，以此類推。 As shown in FIG. 1, in this embodiment, the first-stage driving unit 122_1 is the driving signal output unit A1, and the output terminal of the driving signal output unit A1 is coupled to the second-stage driving unit 122_2 and the corresponding scanning line. SL1; the second-level drive unit 122_2 is a dummy unit B, and the output of the dummy unit B is coupled to the third-level drive unit 122_3; the third-level drive unit 122_3 is a drive signal output unit A2 and a drive signal output unit A2 The output terminal is coupled to the fourth-level driving unit 122_4 and the corresponding scanning line SL2, and so on.
為了進一步理解本發明，請搭配第2圖所示的驅動單元的簡化電路方塊圖。驅動單元122_i包括一輸入子單元221、一下拉子單元223以及一輸出子單元225。輸入子單元221用以接收來自前一級驅 動單元122_(i-1)的輸出或控制訊號(當i=1時，即第一級驅動單元122_1)。輸出子單元225耦接至輸入子單元221以及下拉子單元223，用以回應於輸入子單元221接收到的輸入，提供一輸出。當驅動單元122_i為驅動訊號輸出單元時，驅動單元122_i的輸出子單元225的輸出會被發送至下一級驅動單元122_(i+1)以及對應的掃描線。當驅動單元122_i為虛設單元時，驅動單元122_i的輸出子單元225的輸出會被發送至下一級驅動單元122_(i+1)。下拉子單元223係耦接至輸入子單元221及輸出子單元225，用以調整輸出子單元225的輸出(例如將輸出子單元225的輸出的輸出由一驅動準位(例如高準位)下拉至一初始準位(例如低準位))。 In order to further understand the present invention, please match the simplified circuit block diagram of the driving unit shown in FIG. 2. The driving unit 122_i includes an input sub-unit 221, a pull-down sub-unit 223, and an output sub-unit 225. The input subunit 221 is used to receive the data from the previous driver. Output or control signal of the moving unit 122_ (i-1) (when i = 1, that is, the first-level driving unit 122_1). The output subunit 225 is coupled to the input subunit 221 and the pull-down subunit 223 to provide an output in response to the input received by the input subunit 221. When the driving unit 122_i is a driving signal output unit, the output of the output sub-unit 225 of the driving unit 122_i will be sent to the next-level driving unit 122_ (i + 1) and the corresponding scanning line. When the driving unit 122_i is a dummy unit, the output of the output sub-unit 225 of the driving unit 122_i is sent to the next-level driving unit 122_ (i + 1). The pull-down sub-unit 223 is coupled to the input sub-unit 221 and the output sub-unit 225 to adjust the output of the output sub-unit 225 (for example, the output of the output sub-unit 225 is pulled down by a driving level (such as a high level) To an initial level (such as a low level)).
在本實施例中，驅動單元122_1~122_k的電路結構是相同的，亦即驅動訊號輸出單元A1~Am與虛設單元B的電路結構是相同的。雖然電路結構相同，但是驅動訊號輸出單元A1~Am中的元件與虛設單元B中的元件的尺寸可以相同或不相同。例如，在一實施例中，各驅動訊號輸出單元A1~Am的輸出子單元225的一電晶體的寬長比可大於或等於各虛設單元B的輸出子單元225的一電晶體的寬長比。這樣的配置可使得驅動訊號輸出單元A1~Am能夠提供具有較大電流值的輸出，以驅動掃描線SL1~SLm上的畫素單元P11~Pmn，而虛設單元B提供的輸出只須能夠送至下一級驅動單元即可，故可減少佈局(layout)的面積。 In this embodiment, the circuit structures of the driving units 122_1 to 122_k are the same, that is, the circuit structures of the driving signal output units A1 to Am and the dummy unit B are the same. Although the circuit structure is the same, the sizes of the components in the driving signal output units A1 to Am and the components in the dummy unit B may be the same or different. For example, in one embodiment, the width-to-length ratio of a transistor of the output sub-unit 225 of each driving signal output unit A1 ~ Am may be greater than or equal to the width-to-length ratio of a transistor of the output sub-unit 225 of each dummy unit B. . This configuration can enable the drive signal output units A1 ~ Am to provide outputs with larger current values to drive the pixel units P11 ~ Pmn on the scan lines SL1 ~ SLm, while the output provided by the dummy unit B can only be sent to The lower level driving unit is sufficient, so the layout area can be reduced.
以下將搭配第3圖所示的訊號時序圖來說明第1圖所示的顯示裝置1的運作原理。在第3圖中，各個訊號由上到下依序代表控 制訊號、第一級驅動單元122_1(驅動訊號輸出單元A1)的輸出、第二級驅動單元122_2(虛設單元B)的輸出、第三級驅動單元122_3(驅動訊號輸出單元A2)的輸出、第四級驅動單元122_4(虛設單元B)的輸出，以此類推。首先，控制訊號被發送至第一級驅動單元122_1(驅動訊號輸出單元A1)。回應於控制訊號，第一級驅動單元122_1(驅動訊號輸出單元A1)提供一輸出至第二級驅動單元122_2以及掃描線SL1以驅動掃描線SL1上的畫素單元P11~P1n。接著，回應於第一級驅動單元122_1的輸出，第二級驅動單元122_2(虛設單元B)提供一輸出至第三級驅動單元122_3。再接著，回應於第二級驅動單元122_2的輸出，第三級驅動單元122_3(驅動訊號輸出單元A2)提供一輸出至第四級驅動單元122_4以及掃描線SL2以驅動掃描線SL2上的畫素單元P21~P2n，以此類推。由上述可知，根據本實施例的配置，在一個掃描週期中，各條掃描線SL1~SLm上的畫素單元P11~Pmn的工作時間相較於現有技術的配置(沒有設置虛設單元B的配置)下的各條掃描線上的畫素單元的工作時間來得短(在本實施例中約為一半)，進而降低顯示裝置1的整體亮度。藉由增加或減少設置於驅動訊號輸出單元Ai與另一個驅動訊號輸出單元A(i+1)之間的虛設單元B的數量，能夠有效地控制顯示裝置1的整體亮度，進而避免顯示裝置1提供過高的亮度而對使用者的視力造成損害。 The operation principle of the display device 1 shown in FIG. 1 will be described below with the signal timing diagram shown in FIG. 3. In Figure 3, each signal represents the control sequence from top to bottom. Output signal, output of first-stage drive unit 122_1 (drive signal output unit A1), output of second-stage drive unit 122_2 (dummy unit B), output of third-stage drive unit 122_3 (drive signal output unit A2), first The output of the four-stage driving unit 122_4 (the dummy unit B), and so on. First, the control signal is sent to the first-stage driving unit 122_1 (the driving signal output unit A1). In response to the control signal, the first-level driving unit 122_1 (the driving signal output unit A1) provides an output to the second-level driving unit 122_2 and the scanning line SL1 to drive the pixel units P11 ~ P1n on the scanning line SL1. Then, in response to the output of the first-level driving unit 122_1, the second-level driving unit 122_2 (the dummy unit B) provides an output to the third-level driving unit 122_3. Then, in response to the output of the second-level driving unit 122_2, the third-level driving unit 122_3 (the driving signal output unit A2) provides an output to the fourth-level driving unit 122_4 and the scanning line SL2 to drive the pixels on the scanning line SL2. Units P21 ~ P2n, and so on. It can be known from the above that according to the configuration of this embodiment, in one scanning cycle, the working time of the pixel units P11 to Pmn on each scanning line SL1 to SLm is compared with the configuration of the prior art (the configuration without the dummy unit B is not provided). The working time of the pixel units on each scanning line under) is short (about half in this embodiment), thereby reducing the overall brightness of the display device 1. By increasing or decreasing the number of the dummy units B provided between the driving signal output unit Ai and another driving signal output unit A (i + 1), the overall brightness of the display device 1 can be effectively controlled, thereby avoiding the display device 1 Providing too high brightness causes damage to the user's vision.
需要注意的是，上述僅為舉例而已，在其他實施例中，驅動訊號輸出單元Ai與另一個驅動訊號輸出單元A(i+1)之間也可耦接二個以上的虛設單元B。例如，在一實施例中，驅動訊號輸出單元Ai 與另一個驅動訊號輸出單元A(i+1)之間耦接三個虛設單元B。根據這種配置，顯示裝置的整體亮度大約可降低至25%。 It should be noted that the above is just an example. In other embodiments, more than two dummy units B may be coupled between the driving signal output unit Ai and another driving signal output unit A (i + 1). For example, in one embodiment, the driving signal output unit Ai Three dummy units B are coupled to another driving signal output unit A (i + 1). According to this configuration, the overall brightness of the display device can be reduced to about 25%.
在一實施例中，顯示陣列10與閘極驅動電路12可設置於一基板上，例如採用閘極驅動電路基板(gate on array,GOA)技術。在這種實施例中，能夠減少不必要的佈局面積，使得顯示裝置更加精簡。 In one embodiment, the display array 10 and the gate driving circuit 12 may be disposed on a substrate, for example, using gate on array (GOA) technology. In such an embodiment, it is possible to reduce unnecessary layout area and make the display device more compact.
在一實施例中，顯示裝置1具有一第一模式以及一第二模式。第一模式例如是整體亮度較低的顯示模式，第二模式例如是整體亮度較高的投影模式。舉例來說，當使用者要直視螢幕時，可將顯示裝置1切換至低亮度的第一模式，以避免損害視力；當使用者要將顯示裝置1當作投影機使用(不會直視螢幕)時，可將顯示裝置1切換至高亮度的第二模式。以下將搭配第4~6圖說明在顯示裝置1上實現第一模式與第二模式的三個不同實施例。 In one embodiment, the display device 1 has a first mode and a second mode. The first mode is, for example, a display mode with low overall brightness, and the second mode is, for example, a projection mode with high overall brightness. For example, when the user wants to look directly at the screen, the display device 1 can be switched to the low-brightness first mode to avoid damage to eyesight; when the user wants to use the display device 1 as a projector (will not look directly at the screen) At this time, the display device 1 can be switched to the high-brightness second mode. Hereinafter, three different embodiments for realizing the first mode and the second mode on the display device 1 will be described with reference to FIGS. 4 to 6.
請參照第4圖所示的第一模式與第二模式下掃描訊號與資料訊號的波形示意圖。在本實施例中，不更動各資料線DL1~DLn上的資料訊號的責任比(duty ratio)，並藉由調整各掃描線SL1~SLm上的掃描訊號的責任比，使得在第二模式下各掃描線SL1~SLm上的掃描訊號的責任比大於在第一模式下各掃描線SL1~SLm上的掃描訊號的責任比。因而使得在一掃描週期內，當顯示裝置1處於第二模式時各掃描線SL1~SLm上的掃描訊號與各資料線DL1~DLn上的資料訊號的重疊時間T2_1大於當顯示裝置1處於第一模式T1_1時各掃描線SL1~SLm上的掃描訊號與各資料線DL1~DLn上的資料訊號的重疊時間。所謂重疊時間指的是各掃描 線SL1~SLm上的掃描訊號為高準位，且對應的資料線DL1~DLn上的資料訊號也為高準位的時間區段，亦即於重疊時間內，對應的畫素單元會被寫入。 Please refer to the waveform diagrams of the scanning signal and the data signal in the first mode and the second mode shown in FIG. 4. In this embodiment, the duty ratio of the data signals on the data lines DL1 to DLn is not changed, and the duty ratio of the scan signals on the scan lines SL1 to SLm is adjusted so that in the second mode The responsibility ratio of the scanning signals on each of the scanning lines SL1 to SLm is greater than the responsibility ratio of the scanning signals on each of the scanning lines SL1 to SLm in the first mode. Therefore, during a scanning period, when the display device 1 is in the second mode, the overlap time T2_1 between the scanning signals on the scanning lines SL1 to SLm and the data signals on the data lines DL1 to DLn is greater than when the display device 1 is in the first mode. In the mode T1_1, the overlap time of the scanning signal on each scanning line SL1 ~ SLm and the data signal on each data line DL1 ~ DLn. The so-called overlap time refers to each scan The scanning signals on the lines SL1 ~ SLm are high-level, and the data signals on the corresponding data lines DL1 ~ DLn are also high-level time sections, that is, during the overlapping time, the corresponding pixel unit will be written Into.
請參照第5圖所示的第一模式與第二模式下掃描訊號與資料訊號的波形示意圖。在本實施例中，不更動各掃描線SL1~SLm上的掃描訊號的責任比，並藉由調整各資料線DL1~DLn上的掃描訊號的責任比，使得在第二模式下各資料線DL1~DLn上的掃描訊號的責任比大於在第一模式下各資料線DL1~DLn上的掃描訊號的責任比。因而使得在一掃描週期內，當顯示裝置1處於第二模式時掃描訊號資料訊號的重疊時間T2_2大於當顯示裝置1處於第一模式時掃描訊號與資料訊號的重疊時間T1_2。 Please refer to the waveform diagrams of the scanning signal and the data signal in the first mode and the second mode shown in FIG. 5. In this embodiment, the duty ratio of the scanning signals on each of the scan lines SL1 to SLm is not changed, and the duty ratio of the scanning signals on each of the data lines DL1 to DLn is adjusted so that each data line DL1 is in the second mode. The duty ratio of the scanning signals on ~ DLn is greater than the duty ratio of the scanning signals on each data line DL1 ~ DLn in the first mode. Therefore, during a scanning period, the overlap time T2_2 of the scan signal data signal when the display device 1 is in the second mode is greater than the overlap time T1_2 of the scan signal and the data signal when the display device 1 is in the first mode.
請參照第6圖所示的第一模式與第二模式下掃描訊號與資料訊號的波形示意圖。在本實施例中，係藉由調整各掃描線SL1~SLm上的掃描訊號的責任比以及調整各資料線DL1~DLn上的資料訊號的責任比，以令在一掃描週期內，當顯示裝置1處於第二模式時掃描訊號資料訊號的重疊時間T2_3大於當顯示裝置1處於第一模式時掃描訊號與資料訊號的重疊時間T1_3。 Please refer to the waveform diagrams of the scanning signal and the data signal in the first mode and the second mode shown in FIG. 6. In this embodiment, the duty ratio of the scanning signals on each of the scanning lines SL1 to SLm and the duty ratio of the data signals on each of the data lines DL1 to DLn are adjusted so that during a scanning period, when the display device The overlap time T2_3 of the scan signal data signal when 1 is in the second mode is greater than the overlap time T1_3 of the scan signal and data signal when the display device 1 is in the first mode.
上述三個實施例皆可藉由耦接至資料線DL1~DLn的一控制電路(未繪示)及/或閘極驅動電路122對資料訊號及/或掃描訊號的責任比進行調整而被實現。 The above three embodiments can be implemented by adjusting a responsibility ratio of the data signal and / or the scanning signal by a control circuit (not shown) and / or the gate driving circuit 122 coupled to the data lines DL1 to DLn. .
依據本發明的顯示裝置及閘極驅動電路能夠提供適合使用者直視的整體亮度，特別是避免提供過高的整體亮度，以防止使 用者直視時造成視力損害。此外，本發明藉由調整掃描線上的掃描訊號的責任比及/或資料線上的資料訊號的責任比，使得顯示裝置能更進一步具有兩種不同的模式，以應用於不同的情境。換言之，本發明的顯示裝置除了具備在第一模式下供使用者直接觀看的功能外，更具備在第二模式下將畫面投影到外部供使用者觀看的額外功能。 The display device and the gate driving circuit according to the present invention can provide overall brightness suitable for direct viewing by a user, and in particular, avoid providing excessively high overall brightness, so as to prevent Visual impairment occurs when the user looks directly. In addition, the invention adjusts the duty ratio of the scanning signals on the scan lines and / or the duty ratio of the data signals on the data lines, so that the display device can further have two different modes to be applied to different situations. In other words, the display device of the present invention has the additional function of projecting a screen to the outside for viewing by the user in the second mode, in addition to the function for direct viewing by the user in the first mode.
綜上所述，雖然本發明已以實施例揭露如上，然其並非用以限定本發明。本發明所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾。因此，本發明之保護範圍當視後附之申請專利範圍所界定者為準。 In summary, although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.
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