TWI823078B - Source driver chips that can reduce heat energy generation and liquid crystal displays and information processing devices that utilize them - Google Patents
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Abstract
一種可減少熱能生成之源極驅動晶片,具有:一極性變換偵測單元,用以偵測前、後兩列顯示資料中是否有兩個同一行的顯示資料的極性相反,若是,則使一第一偵測結果呈現作用狀態,若否,則使該第一偵測結果呈現不作用狀態,並使一極性相同信號呈現作用狀態;一資料電壓變化偵測單元,用以在該極性相同信號呈現所述作用狀態時,判斷所述兩個同一行的顯示資料的數值差異是否大於一閾值,若是,則使一第二偵測結果呈現作用狀態;以及一開關電路,用以在該第一偵測結果或該第二偵測結果呈現作用狀態時對一TFT液晶陣列進行一電荷分享操作,以使該TFT液晶陣列的兩個相鄰的資料通道中的畫素電容進行電荷重分配。A source driver chip that can reduce heat energy generation has: a polarity conversion detection unit used to detect whether there are two display data in the same row in the front and back columns of display data with opposite polarities. If so, a The first detection result is in the active state. If not, the first detection result is in the inactive state and a signal of the same polarity is in the active state; a data voltage change detection unit is used to detect the signal of the same polarity in the active state. When the active state is present, it is judged whether the numerical difference between the two display data of the same row is greater than a threshold, and if so, a second detection result is presented in the active state; and a switch circuit is used to perform the first When the detection result or the second detection result shows an active state, a charge sharing operation is performed on a TFT liquid crystal array, so that the pixel capacitances in two adjacent data channels of the TFT liquid crystal array are redistributed.
Description
本發明係有關源極驅動晶片片,尤指一種可減少熱能生成之源極驅動晶片。The present invention relates to a source driver chip, in particular to a source driver chip that can reduce heat energy generation.
為了降低液晶顯示器於操作時所產生的熱能,習知已有電荷分享的技術方案被提出。請參照圖1a,其繪示一習知液晶顯示器之一電荷分享控制電路方塊圖。如圖1a所示,該電荷分享控制電路包括一時序控制器10、一源極驅動器21及一TFT液晶陣列30,其中,源極驅動器21包括一電荷分享驅動單元21a及一源極驅動單元21b。In order to reduce the heat energy generated by the liquid crystal display during operation, charge sharing technical solutions have been proposed. Please refer to FIG. 1a, which illustrates a block diagram of a charge sharing control circuit of a conventional liquid crystal display. As shown in Figure 1a, the charge sharing control circuit includes a
時序控制器10係用以藉由一顯示資料信號S
DISP傳送顯示資料至源極驅動器21;電荷分享驅動單元21a係用以週期性地無條件輸出一電荷分享控制信號C
CS至源極驅動單元21b以驅動源極驅動單元21b內部之一開關電路,從而在以與顯示資料對應之畫素電壓對TFT液晶陣列30之每列畫素電容充電之前,使各列畫素電容兩兩進行電荷分享。
The
請參照圖1b,其繪示圖1a之電荷分享控制電路之一工作時序圖。如圖1b所示,各畫素電壓建立期間均包含一電荷分享期間T
S及一畫素電壓驅動期間T
DRV,其中,源極驅動單元21b,不論其各輸出通道輸出的每兩個在時間上相鄰的畫素電壓是否會有極性相反的情形,亦即不論是(+,-)、(+,+)、(-,-)或(-,+),其在每一電荷分享期間T
S均會使複數個輸出通道中之每一奇數輸出通道Y
2n-1與一相鄰的偶數輸出通道Y
2n進行電荷分享,以在電荷分享期間T
S結束時使奇數輸出通道Y
2n-1與偶數輸出通道Y
2n的電壓均到達一中間電壓V
DD2M,其中,極性+代表畫素電壓高於中間電壓V
DD2M,極性-代表畫素電壓低於中間電壓V
DD2M。
Please refer to FIG. 1b, which illustrates an operating timing diagram of the charge sharing control circuit of FIG. 1a. As shown in Figure 1b, each pixel voltage establishment period includes a charge sharing period T S and a pixel voltage driving period T DRV . Among them, the
然而,當各輸出通道輸出的兩個在時間上相鄰的畫素電壓極性相同且數值不變時,圖1a之電荷分享控制電路卻會有多餘的充、放電過程而產生多餘的熱能。However, when the voltage polarity of two temporally adjacent pixels output by each output channel is the same and the value remains unchanged, the charge sharing control circuit in Figure 1a will have redundant charging and discharging processes and generate redundant heat energy.
另外,請參照圖2a,其繪示另一習知液晶顯示器之一電荷分享控制電路方塊圖。如圖2a所示,該電荷分享控制電路包括一時序控制器10、一源極驅動器22及一TFT液晶陣列30,其中,源極驅動器22包括一極性變換偵測單元22a及一源極驅動單元22b。In addition, please refer to FIG. 2a, which illustrates a block diagram of a charge sharing control circuit of another conventional liquid crystal display. As shown in Figure 2a, the charge sharing control circuit includes a
時序控制器10係用以藉由一顯示資料信號S
DISP傳送顯示資料至源極驅動器22;極性變換偵測單元22a係用以在偵測到兩列顯示資料中,位於同一行的兩個顯示資料的對應電壓極性相反時使一電荷分享致能信號C
CS呈現作用狀態,且源極驅動單元22b在電荷分享致能信號C
CS呈現作用狀態時會驅動其內部之一開關電路,以促使TFT液晶陣列30之兩個對應的資料通道進行電荷分享,以節省在畫素電容上建立下一個畫素電壓所需的電荷量。
The
請參照圖2b,其繪示圖2a之電荷分享控制電路之一工作時序圖。如圖2b所示,各畫素電壓建立期間均包含一電荷分享期間T S及一畫素電壓驅動期間T DRV,其中,源極驅動單元22b在一奇數輸出通道Y 2n-1輸出的兩個相鄰的畫素電壓有極性相反(+,-)的情形時,會在(+,-)之間的一電荷分享期間T S使奇數輸出通道Y 2n-1與一相鄰的偶數輸出通道Y 2n進行電荷分享,以在電荷分享期間T S結束時使奇數輸出通道Y 2n-1與偶數輸出通道Y 2n的電壓均到達一中間電壓V DD2M;而在奇數輸出通道Y 2n-1輸出的兩個相鄰的畫素電壓極性相同(+,+)時,則不使奇數輸出通道Y 2n-1與相鄰的偶數輸出通道Y 2n進行電荷分享。 Please refer to FIG. 2b, which illustrates an operating timing diagram of the charge sharing control circuit of FIG. 2a. As shown in Figure 2b, each pixel voltage establishment period includes a charge sharing period TS and a pixel voltage driving period T DRV , in which the source driving unit 22b outputs two When adjacent pixel voltages have opposite polarities (+,-), a charge sharing period T S between (+,-) will cause the odd-numbered output channel Y 2n-1 to be connected to an adjacent even-numbered output channel. Y 2n performs charge sharing, so that at the end of the charge sharing period TS , the voltages of the odd output channel Y 2n-1 and the even output channel Y 2n both reach an intermediate voltage V DD2M ; while the voltage output by the odd output channel Y 2n-1 When the voltage polarity of two adjacent pixels is the same (+, +), the odd-numbered output channel Y 2n-1 and the adjacent even-numbered output channel Y 2n are not allowed to share charges.
圖2a之電荷分享控制電路能夠避免各輸出通道輸出的兩個在時間上相鄰的畫素電壓極性相同且數值不變時的多餘的充、放電過程,然而,其在各輸出通道輸出的兩個在時間上相鄰的畫素電壓極性相同但數值由大變小或由小變大時卻仍然會有大量電荷流動而釋放熱能。The charge sharing control circuit in Figure 2a can avoid redundant charging and discharging processes when the voltage polarity of two adjacent pixels output by each output channel is the same and the value remains unchanged. The voltage polarity of two adjacent pixels in time is the same, but when the value changes from large to small or from small to large, a large amount of charge will still flow and heat energy will be released.
為解決上述的問題,本領域亟需一種新穎的源極驅動晶片。In order to solve the above problems, a novel source driver chip is urgently needed in this field.
本發明之一目的在於提供一種可減少熱能生成之源極驅動晶片,其可在前、後兩列顯示資料中有兩個同一行的顯示資料的極性相反時對一TFT液晶陣列進行一電荷分享操作,以及在所述兩個同一行的顯示資料的極性相同但其數值差異大於一閾值時對該TFT液晶陣列進行該電荷分享操作,從而進一步降低一液晶顯示器所產生之熱能。One object of the present invention is to provide a source driver chip that can reduce the generation of heat energy and can perform charge sharing on a TFT liquid crystal array when there are two display data in the same row in the front and back columns of display data with opposite polarities. Operation, and performing the charge sharing operation on the TFT liquid crystal array when the polarity of the two display data in the same row is the same but the numerical difference is greater than a threshold, thereby further reducing the heat energy generated by a liquid crystal display.
本發明之另一目的在於提供一種液晶顯示器,其可在前、後兩列顯示資料中有兩個同一行的顯示資料的極性相反時對一TFT液晶陣列進行一電荷分享操作,以及在所述兩個同一行的顯示資料的極性相同但其數值差異大於一閾值時對該TFT液晶陣列進行該電荷分享操作,從而進一步降低該液晶顯示器所產生之熱能。Another object of the present invention is to provide a liquid crystal display that can perform a charge sharing operation on a TFT liquid crystal array when there are two display data in the same row in the front and back columns of display data with opposite polarities, and in the When the polarity of two display data in the same row is the same but the numerical difference is greater than a threshold, the charge sharing operation is performed on the TFT liquid crystal array, thereby further reducing the heat energy generated by the liquid crystal display.
本發明之又一目的在於提供一種資訊處理裝置,其具有前述之液晶顯示器而可減少其所產生之熱能。Another object of the present invention is to provide an information processing device, which has the aforementioned liquid crystal display and can reduce the heat energy generated by the liquid crystal display.
為達到前述之目的,一種可減少熱能生成之源極驅動晶片乃被提出,其具有:In order to achieve the aforementioned goals, a source driver chip that can reduce heat energy generation is proposed, which has:
一極性變換偵測單元,用以偵測前、後兩列顯示資料中是否有兩個同一行的顯示資料的極性相反,若是,則使一第一偵測結果呈現作用狀態,若否,則使該第一偵測結果呈現不作用狀態,並使一極性相同信號呈現作用狀態;A polarity change detection unit is used to detect whether there are two display data in the same row in the previous and next columns of display data with opposite polarities. If so, a first detection result is presented in an active state. If not, then Make the first detection result appear inactive state, and make a signal with the same polarity appear in active state;
一資料電壓變化偵測單元,用以在該極性相同信號呈現所述作用狀態時,判斷所述兩個同一行的顯示資料的數值差異是否大於一閾值,若是,則使一第二偵測結果呈現作用狀態,若否,則使該第二偵測結果呈現不作用狀態;以及A data voltage change detection unit, used to determine whether the numerical difference between the two display data of the same row is greater than a threshold when the signal of the same polarity is in the action state. If so, a second detection result is obtained. Present the active state, if not, make the second detection result present the inactive state; and
一開關電路,用以在該第一偵測結果或該第二偵測結果呈現作用狀態時對一TFT液晶陣列進行一電荷分享操作,以使該TFT液晶陣列的兩個相鄰的資料通道中的畫素電容進行電荷重分配。A switch circuit for performing a charge sharing operation on a TFT liquid crystal array when the first detection result or the second detection result is in an active state, so that two adjacent data channels of the TFT liquid crystal array The pixel capacitor performs charge redistribution.
在一實施例中,該極性變換偵測單元具有一暫存器單元以暫存至少一列的所述顯示資料。In one embodiment, the polarity change detection unit has a register unit to temporarily store the display data of at least one column.
在一實施例中,該資料電壓變化偵測單元具有一暫存器單元以暫存至少一列的所述顯示資料。In one embodiment, the data voltage change detection unit has a register unit to temporarily store the display data of at least one column.
為達到前述之目的,本發明進一步提出一種液晶顯示器,其具有一可減少熱能生成之源極驅動晶片及一TFT液晶陣列,該可減少熱能生成之源極驅動晶片具有:In order to achieve the aforementioned goals, the present invention further proposes a liquid crystal display, which has a source driver chip that can reduce heat energy generation and a TFT liquid crystal array. The source driver chip that can reduce heat energy generation has:
一極性變換偵測單元,用以偵測前、後兩列顯示資料中是否有兩個同一行的顯示資料的極性相反,若是,則使一第一偵測結果呈現作用狀態,若否,則使該第一偵測結果呈現不作用狀態,並使一極性相同信號呈現作用狀態;A polarity change detection unit is used to detect whether there are two display data in the same row in the previous and next columns of display data with opposite polarities. If so, a first detection result is presented in an active state. If not, then Make the first detection result appear inactive state, and make a signal with the same polarity appear in active state;
一資料電壓變化偵測單元,用以在該極性相同信號呈現所述作用狀態時,判斷所述兩個同一行的顯示資料的數值差異是否大於一閾值,若是,則使一第二偵測結果呈現作用狀態,若否,則使該第二偵測結果呈現不作用狀態;以及A data voltage change detection unit, used to determine whether the numerical difference between the two display data of the same row is greater than a threshold when the signal of the same polarity is in the action state. If so, a second detection result is obtained. Present the active state, if not, make the second detection result present the inactive state; and
一開關電路,用以在該第一偵測結果或該第二偵測結果呈現作用狀態時對該TFT液晶陣列進行一電荷分享操作,以使該TFT液晶陣列的兩個相鄰的資料通道中的畫素電容進行電荷重分配。A switch circuit for performing a charge sharing operation on the TFT liquid crystal array when the first detection result or the second detection result is in an active state, so that two adjacent data channels of the TFT liquid crystal array The pixel capacitor performs charge redistribution.
在一實施例中,所述之液晶顯示器進一步具有一時序控制器以傳送所述顯示資料至該可減少熱能生成之源極驅動晶片。In one embodiment, the liquid crystal display further has a timing controller to transmit the display data to the source driver chip that can reduce heat energy generation.
在一實施例中,該極性變換偵測單元具有一暫存器單元以暫存至少一列的所述顯示資料。In one embodiment, the polarity change detection unit has a register unit to temporarily store the display data of at least one column.
在一實施例中,該資料電壓變化偵測單元具有一暫存器單元以暫存至少一列的所述顯示資料。In one embodiment, the data voltage change detection unit has a register unit to temporarily store the display data of at least one column.
為達到前述之目的,本發明進一步提出一種資訊處理裝置,其具有一中央處理單元及如前述之液晶顯示器。In order to achieve the above object, the present invention further proposes an information processing device, which has a central processing unit and the aforementioned liquid crystal display.
在可能的實施例中,該資訊處理裝置可為一攜帶型電腦或一智慧型手持裝置。In possible embodiments, the information processing device may be a portable computer or an intelligent handheld device.
本發明之原理在於:The principle of the present invention is:
(一)在前、後兩列顯示資料中有兩個同一行的顯示資料的極性相反時,使一第一偵測結果呈現作用狀態,反之,則使該第一偵測結果呈現不作用狀態;(1) When there are two display data in the same row in the front and back columns of display data with opposite polarities, a first detection result will be in an active state; otherwise, the first detection result will be in an inactive state. ;
(二) 在該第一偵測結果呈現不作用狀態的情況下,若有兩個同一行的顯示資料的數值差異大於一閾值,則使一第二偵測結果呈現作用狀態,反之,則使該第二偵測結果呈現不作用狀態;以及(2) When the first detection result is in an inactive state, if the numerical difference between two display data in the same row is greater than a threshold, a second detection result is made in an active state; otherwise, the second detection result is in an active state. The second detection result is inactive; and
(三)在該第一偵測結果或該第二偵測結果呈現作用狀態時驅使一開關電路對一TFT液晶陣列進行一電荷分享操作。(3) Driving a switch circuit to perform a charge sharing operation on a TFT liquid crystal array when the first detection result or the second detection result is in an active state.
依此,本發明即可進一步節省該TFT液晶陣列的功耗,從而降低液晶顯示器所產生的熱能。Accordingly, the present invention can further save the power consumption of the TFT liquid crystal array, thereby reducing the heat energy generated by the liquid crystal display.
請參照圖3,其繪示包含本發明之可減少熱能生成之源極驅動晶片之一液晶顯示器之方塊圖。如圖3所示,一液晶顯示器100包括一時序控制器110、一可減少熱能生成之源極驅動晶片120及一TFT液晶陣列130。為彰顯本發明之技術特徵,液晶顯示器100中未直接與本發明相關之其它構成元件,例如閘極驅動晶片及背光模組,乃未示於圖3中。Please refer to FIG. 3 , which illustrates a block diagram of a liquid crystal display including a source driver chip that can reduce heat energy generation of the present invention. As shown in FIG. 3 , a
時序控制器110係用以藉由一顯示資料信號S
DISP傳送顯示資料至可減少熱能生成之源極驅動晶片120。
The
可減少熱能生成之源極驅動晶片120具有一極性變換偵測單元121、一資料電壓變化偵測單元122及一開關電路123。The
極性變換偵測單元121係用以偵測前、後兩列顯示資料中是否有兩個同一行的顯示資料的極性相反,若是,則使一第一偵測結果S
CS1呈現作用狀態,反之,則使該第一偵測結果S
CS1呈現不作用狀態,並使一極性相同信號S
PSM呈現作用狀態。另外,極性變換偵測單元121可具有一暫存器單元以暫存至少一列的顯示資料。
The polarity
資料電壓變化偵測單元122係用以在極性相同信號S
PSM呈現作用狀態時,判斷所述兩個同一行的顯示資料的數值差異是否大於一閾值,若是,則使一第二偵測結果S
CS2呈現作用狀態,反之,則使該第二偵測結果S
CS2呈現不作用狀態。另外,資料電壓變化偵測單元122可具有一暫存器單元以暫存至少一列的顯示資料。
The data voltage
開關電路123係用以在該第一偵測結果S
CS1或該第二偵測結果S
CS2呈現作用狀態時對TFT液晶陣列130進行一電荷分享操作,使TFT液晶陣列130的兩個相鄰的資料通道中的畫素電容進行電荷重分配,從而降低新的畫素電壓的建立時間。
The
依上述的說明,本發明進一步提出一資訊處理裝置。請參照圖4,其繪示本發明之資訊處理裝置之一實施例的方塊圖。如圖4所示,一資訊處理裝置200具有一中央處理單元210及一液晶顯示器220,其中,中央處理單元210係用以與液晶顯示器220通信且液晶顯示器220係由液晶顯示器100實現。另外,資訊處理裝置200可為一攜帶型電腦或一智慧型手持裝置。According to the above description, the present invention further provides an information processing device. Please refer to FIG. 4 , which illustrates a block diagram of an embodiment of the information processing device of the present invention. As shown in FIG. 4 , an
依上述的說明可知,本發明可提供以下的優點:According to the above description, the present invention can provide the following advantages:
1. 本發明的可減少熱能生成之源極驅動晶片可在前、後兩列顯示資料中有兩個同一行的顯示資料的極性相反時對一TFT液晶陣列進行一電荷分享操作,以及在所述兩個同一行的顯示資料的極性相同但其數值差異大於一閾值時對該TFT液晶陣列進行該電荷分享操作,從而進一步降低一液晶顯示器所產生之熱能。1. The source driver chip of the present invention that can reduce the generation of heat energy can perform a charge sharing operation on a TFT liquid crystal array when there are two display data in the same row in the front and back columns of display data with opposite polarities, and in all cases When the polarity of the two display data in the same row is the same but the numerical difference is greater than a threshold, the charge sharing operation is performed on the TFT liquid crystal array, thereby further reducing the heat energy generated by a liquid crystal display.
2.本發明的液晶顯示器可在前、後兩列顯示資料中有兩個同一行的顯示資料的極性相反時對一TFT液晶陣列進行一電荷分享操作,以及在所述兩個同一行的顯示資料的極性相同但其數值差異大於一閾值時對該TFT液晶陣列進行該電荷分享操作,從而進一步降低該液晶顯示器所產生之熱能。2. The liquid crystal display of the present invention can perform a charge sharing operation on a TFT liquid crystal array when there are two display data in the same row in the front and back columns of display data with opposite polarities, and when the two display data in the same row have opposite polarities, When the polarity of the data is the same but the numerical difference is greater than a threshold, the charge sharing operation is performed on the TFT liquid crystal array, thereby further reducing the heat energy generated by the liquid crystal display.
3.本發明的資訊處理裝置因具有前述之液晶顯示器而可減少其所產生之熱能。3. The information processing device of the present invention can reduce the heat energy generated by having the aforementioned liquid crystal display.
本發明所揭示者,乃較佳實施例之一種,舉凡局部之變更或修飾而源於本發明之技術思想而為熟習該項技藝知人所易於推知者,俱不脫本發明之專利權範疇。What is disclosed in the present invention is one of the preferred embodiments. Any partial changes or modifications derived from the technical ideas of the present invention and easily inferred by those skilled in the art will not depart from the scope of the patent rights of the present invention.
綜上所陳,本案無論目的、手段與功效,皆顯示其迥異於習知技術,且其首先發明合於實用,確實符合發明之專利要件,懇請 貴審查委員明察,並早日賜予專利俾嘉惠社會,是為至禱。To sum up, regardless of the purpose, means and effects of this case, it shows that it is completely different from the conventional technology, and that the invention is practical first, and indeed meets the patent requirements for inventions. I sincerely ask the review committee to take a clear look and grant the patent as soon as possible for your benefit. Society is a prayer for the Supreme Being.
10:時序控制器
21:源極驅動器
21a:電荷分享驅動單元
21b:源極驅動單元
22:源極驅動器
22a:極性變換偵測單元
22b:源極驅動單元
30:TFT液晶陣列
100:液晶顯示器
110:時序控制器
120:可減少熱能生成之源極驅動晶片
121:極性變換偵測單元
122:資料電壓變化偵測單元
123:開關電路
130:TFT液晶陣列
200:資訊處理裝置
210:中央處理單元
220:液晶顯示器
10: Timing controller
21:
為進一步揭示本發明之具體技術內容,首先請參閱圖式,其中: 圖1a繪示一習知液晶顯示器之一電荷分享控制電路方塊圖。 圖1b繪示圖1a之電荷分享控制電路之一工作時序圖。 圖2a繪示另一習知液晶顯示器之一電荷分享控制電路方塊圖。 圖2b繪示圖2a之電荷分享控制電路之一工作時序圖。 圖3繪示包含本發明之可減少熱能生成之源極驅動晶片之一液晶顯示器之方塊圖。 圖4繪示本發明之資訊處理裝置之一實施例的方塊圖。 In order to further disclose the specific technical content of the present invention, please first refer to the drawings, in which: FIG. 1a shows a block diagram of a charge sharing control circuit of a conventional liquid crystal display. FIG. 1b illustrates an operating timing diagram of the charge sharing control circuit of FIG. 1a. FIG. 2a shows a block diagram of a charge sharing control circuit of another conventional liquid crystal display. FIG. 2b illustrates an operating timing diagram of the charge sharing control circuit of FIG. 2a. FIG. 3 is a block diagram of a liquid crystal display including a source driver chip capable of reducing heat energy generation of the present invention. FIG. 4 is a block diagram of an embodiment of the information processing device of the present invention.
100:液晶顯示器 100:LCD display
110:時序控制器 110: Timing controller
120:可減少熱能生成之源極驅動晶片 120: Source driver chip that can reduce heat energy generation
121:極性變換偵測單元 121: Polarity change detection unit
122:資料電壓變化偵測單元 122: Data voltage change detection unit
123:開關電路 123: Switch circuit
130:TFT液晶陣列 130:TFT LCD array
Claims (5)
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