TWI668932B - Over current protection system and over current protection method - Google Patents

Over current protection system and over current protection method Download PDF

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Publication number
TWI668932B
TWI668932B TW107105655A TW107105655A TWI668932B TW I668932 B TWI668932 B TW I668932B TW 107105655 A TW107105655 A TW 107105655A TW 107105655 A TW107105655 A TW 107105655A TW I668932 B TWI668932 B TW I668932B
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current
signal
driving
overcurrent protection
preset
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TW107105655A
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Chinese (zh)
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TW201935795A (en
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李禮盈
駱亭融
許明偉
陳雅芳
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友達光電股份有限公司
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Abstract

過電流保護系統包含適用於一顯示面板,顯示面板包含一閘極驅動陣列和一顯示區,過電流保護系統包含一驅動模組和一第一電流調整電路。驅動模組用於提供一第一驅動信號至閘極驅動陣列。第一電流調整電路耦接於驅動模組和閘極驅動陣列之間,其中第一電流調整電路位於第一驅動信號的一第一信號電流的電流路徑上。其中,於第一信號電流的脈衝期間,若第一信號電流的大小的絕對值大於一預設門檻值持續超過一預設時間長度,第一電流調整電路限制第一信號電流的大小的絕對值不大於預設門檻值,直到第一信號電流的脈衝期間結束。 The overcurrent protection system comprises a display panel, the display panel comprises a gate drive array and a display area, and the overcurrent protection system comprises a drive module and a first current adjustment circuit. The driving module is configured to provide a first driving signal to the gate driving array. The first current adjustment circuit is coupled between the driving module and the gate driving array, wherein the first current adjusting circuit is located on a current path of a first signal current of the first driving signal. Wherein, during the pulse of the first signal current, if the absolute value of the magnitude of the first signal current is greater than a predetermined threshold for more than a predetermined length of time, the first current adjustment circuit limits the absolute value of the magnitude of the first signal current Not greater than the preset threshold until the end of the pulse period of the first signal current.

Description

過電流保護系統和過電流保護方法 Overcurrent protection system and overcurrent protection method
本揭示文件有關適用於顯示面板的過電流保護系統和過電流保護方法。 This disclosure relates to an overcurrent protection system and an overcurrent protection method suitable for a display panel.
傳統顯示器中通常包含用於保護閘極驅動模組的過電流保護裝置。前述的過電流保護裝置於閘極驅動模組發生過電流事件的時間總和達到特定時間長度時,才會啟動過電流保護機制。然而,在前述的過電流保護裝置計算發生過電流事件的時間總合的過程中,閘極驅動模組持續承受著過大的電流。因此,即使傳統顯示器具備有過電流保護裝置,傳統顯示器中的閘極驅動模組仍容易因長時間承受過大的電流而損壞。 Conventional displays typically include an overcurrent protection device for protecting the gate drive module. The overcurrent protection device activates the overcurrent protection mechanism when the total time of the overcurrent event occurring in the gate drive module reaches a certain length of time. However, during the aforementioned overcurrent protection device calculating the total time of occurrence of an overcurrent event, the gate drive module continues to withstand excessive current. Therefore, even if the conventional display is provided with an overcurrent protection device, the gate drive module in the conventional display is easily damaged by excessive current for a long time.
有鑑於此,如何提供於過電流事件發生時能及時降低閘極驅動模組所承受的電流大小的過電流保護系統和過電流保護方法,實為業界有待解決的問題。 In view of this, how to provide an overcurrent protection system and an overcurrent protection method capable of reducing the current of the gate drive module in time when an overcurrent event occurs is a problem to be solved in the industry.
過電流保護系統包含適用於一顯示面板,該顯示面板包含一閘極驅動陣列和一顯示區,該過電流保護系統包含一驅動模組和一第一電流調整電路。驅動模組用於提供一第一驅動信號至該閘極驅動陣列。第一電流調整電路耦接於該驅動模組和該閘極驅動陣列之間,其中該第一電流調整電路位於該第一驅動信號的一第一信號電流的電流路徑上。其中,於該第一信號電流的脈衝期間,若該第一信號電流的大小的絕對值大於一預設門檻值超過一預設時間長度,該第一電流調整電路限制該第一信號電流的大小的絕對值不大於該預設門檻值,直到該第一信號電流的該脈衝期間結束。 The overcurrent protection system comprises a display panel, the display panel comprises a gate drive array and a display area, and the overcurrent protection system comprises a driving module and a first current adjustment circuit. The driving module is configured to provide a first driving signal to the gate driving array. The first current adjustment circuit is coupled between the driving module and the gate driving array, wherein the first current adjusting circuit is located on a current path of a first signal current of the first driving signal. The first current adjustment circuit limits the size of the first signal current during the pulse of the first signal current, if the absolute value of the magnitude of the first signal current is greater than a predetermined threshold for more than a predetermined length of time The absolute value is not greater than the preset threshold until the end of the pulse period of the first signal current.
過電流保護方法適用於一顯示面板,該顯示面板包含一閘極驅動陣列和一顯示區,該過電流保護方法包含以下步驟:提供一驅動模組,其中該驅動模組用於提供一第一驅動信號至該閘極驅動陣列;提供一第一電流調整電路,其中該第一電流調整電路耦接於該驅動模組和該閘極驅動陣列之間,且位於該第一驅動信號的一第一信號電流的電流路徑上;於該第一信號電流的脈衝期間,若該第一信號電流的大小的絕對值大於一預設門檻值超過一預設時間長度,利用該第一電流調整電路限制該第一信號電流的大小的絕對值不大於該預設門檻值,直到該第一信號電流的脈衝期間結束。 The overcurrent protection method is applicable to a display panel, the display panel includes a gate drive array and a display area, and the overcurrent protection method includes the following steps: providing a driving module, wherein the driving module is configured to provide a first Driving a signal to the gate driving array; providing a first current adjusting circuit, wherein the first current adjusting circuit is coupled between the driving module and the gate driving array, and is located at the first driving signal a current path of the signal current; during the pulse of the first signal current, if the absolute value of the magnitude of the first signal current is greater than a predetermined threshold for more than a predetermined length of time, the first current adjustment circuit is used to limit The absolute value of the magnitude of the first signal current is not greater than the preset threshold until the end of the pulse period of the first signal current.
上述實施例中的過電流保護系統和過電流保護方法可以防止顯示面板因長時間承受過大的電流而損壞。 The overcurrent protection system and the overcurrent protection method in the above embodiments can prevent the display panel from being damaged due to excessive current being subjected to excessive current for a long time.
100‧‧‧過電流保護系統 100‧‧‧Overcurrent protection system
101‧‧‧顯示面板 101‧‧‧ display panel
103‧‧‧閘極驅動模組 103‧‧‧Gate drive module
105‧‧‧顯示區 105‧‧‧ display area
110‧‧‧驅動模組 110‧‧‧Drive Module
120a~120n‧‧‧電流調整電路 120a~120n‧‧‧ Current adjustment circuit
130‧‧‧邏輯電路 130‧‧‧Logical Circuit
140‧‧‧儲存模組 140‧‧‧ storage module
201‧‧‧短路路徑 201‧‧‧ Short circuit path
203a~203n‧‧‧移位暫存器 203a~203n‧‧‧Shift register
500‧‧‧過電流保護方法 500‧‧‧Overcurrent protection method
Ihck1‧‧‧第一信號電流 Ihck1‧‧‧first signal current
Ihck2‧‧‧第二信號電流 Ihck2‧‧‧second signal current
Vhck1‧‧‧第一時脈信號 Vhck1‧‧‧ first clock signal
Vhck2‧‧‧第二時脈信號 Vhck2‧‧‧second clock signal
Vssg‧‧‧固定電壓 Vssg‧‧‧fixed voltage
Vst‧‧‧起始脈衝信號 Vst‧‧‧ starting pulse signal
Tp‧‧‧脈衝期間 Tp‧‧‧ pulse period
T1、T2、T3‧‧‧第一時段、第二時段、第三時段 T1, T2, T3‧‧‧ first time period, second time period, third time period
s502~s528‧‧‧流程 S502~s528‧‧‧Process
為讓揭示文件之上述和其他目的、特徵、優點與實施例能更明顯易懂,所附圖式之說明如下:第1圖為根據本揭示文件一實施例的過電流保護系統簡化後的功能方塊圖。 The above and other objects, features, advantages and embodiments of the disclosure will be more apparent. The description of the drawings is as follows: FIG. 1 is a simplified function of an overcurrent protection system according to an embodiment of the present disclosure. Block diagram.
第2圖為根據本揭示文件一實施例的閘極驅動模組簡化後的功能方塊圖。 FIG. 2 is a simplified functional block diagram of a gate driving module according to an embodiment of the present disclosure.
第3圖為根據第1圖的過電流保護系統的一運作實施例簡化後的時序變化圖。 Figure 3 is a simplified timing diagram of an operational embodiment of the overcurrent protection system of Figure 1.
第4圖為根據第1圖的過電流保護系統的另一運作實施例簡化後的時序變化圖。 Fig. 4 is a simplified timing change diagram of another operational embodiment of the overcurrent protection system according to Fig. 1.
第5a圖和第5b圖共同繪示本揭示文件一實施例的過電流保護方法的流程圖。 5a and 5b together illustrate a flow chart of an overcurrent protection method in accordance with an embodiment of the present disclosure.
以下將配合相關圖式來說明本發明的實施例。在圖式中,相同的標號表示相同或類似的元件或方法流程。 Embodiments of the present invention will be described below in conjunction with the associated drawings. In the drawings, the same reference numerals indicate the same or similar elements or methods.
第1圖為根據本揭示文件一實施例的過電流保護系統100簡化後的功能方塊圖。過電流保護系統100包含驅動模組110、多個電流調整電路120a~120n、邏輯電路130和儲存模組140,其中儲存模組140耦接於邏輯電路130,且用於儲存邏輯電路130運作所需的資訊。為使圖面簡潔而易於說明,過電流保護系統100中的其他元件與連接 關係並未繪示於第1圖中。 1 is a simplified functional block diagram of an overcurrent protection system 100 in accordance with an embodiment of the present disclosure. The overcurrent protection system 100 includes a driving module 110, a plurality of current adjusting circuits 120a-120n, a logic circuit 130, and a storage module 140. The storage module 140 is coupled to the logic circuit 130 and is used to store the logic circuit 130. Information needed. In order to make the drawing simple and easy to explain, other components and connections in the overcurrent protection system 100 The relationship is not shown in Figure 1.
過電流保護系統100耦接於顯示面板101,其中顯示面板101包含閘極驅動模組103和顯示區105。過電流保護系統100可於閘極驅動模組103發生過電流(overcurrent)事件時,限制或截止閘極驅動模組103中的電流,以防止閘極驅動模組103因過電流而損壞。 The overcurrent protection system 100 is coupled to the display panel 101 , wherein the display panel 101 includes a gate driving module 103 and a display area 105 . The overcurrent protection system 100 can limit or turn off the current in the gate driving module 103 when an overcurrent event occurs in the gate driving module 103 to prevent the gate driving module 103 from being damaged due to an overcurrent.
在本實施例中,過電流保護系統100和顯示面板101分別設置於不同基板。然而,在某些實施例中,過電流保護系統100亦可和顯示面板101設置於同一基板。 In the embodiment, the overcurrent protection system 100 and the display panel 101 are respectively disposed on different substrates. However, in some embodiments, the overcurrent protection system 100 can also be disposed on the same substrate as the display panel 101.
第2圖為根據本揭示文件一實施例的閘極驅動模組103簡化後的功能方塊圖。同時參照第1圖和第2圖,驅動模組110用於輸出第一時脈信號Vhck1、第二時脈信號Vhck2、起始脈衝信號Vst和固定電壓Vssg至閘極驅動模組103,以控制閘極驅動模組103更新顯示區105的顯示畫面。其中,第一時脈信號Vhck1、第二時脈信號Vhck2用於使閘極驅動模組103的多個移位暫存器203a~203n依序運作。起始脈衝信號Vst則用於在顯示區105的每一幀畫面開始時觸發閘極驅動陣列103。 FIG. 2 is a simplified functional block diagram of a gate driving module 103 according to an embodiment of the present disclosure. Referring to FIG. 1 and FIG. 2 simultaneously, the driving module 110 is configured to output a first clock signal Vhck1, a second clock signal Vhck2, a start pulse signal Vst, and a fixed voltage Vssg to the gate driving module 103 to control The gate driving module 103 updates the display screen of the display area 105. The first clock signal Vhck1 and the second clock signal Vhck2 are used to sequentially operate the plurality of shift registers 203a to 203n of the gate driving module 103. The start pulse signal Vst is used to trigger the gate drive array 103 at the beginning of each frame of the display area 105.
請注意,本案說明書和圖式中使用的元件編號中的小寫英文索引a~n,只是為了方便指稱個別的元件,並非有意將前述元件的數量侷限在特定數目。在本案說明書和圖式中,若使用某一元件編號或信號編號時沒有指明該元件編號或信號編號的索引,則代表該元件編號或信號編號是指稱所屬元件群組或信號群組中不特定的任一元件或 信號。例如,元件編號120a指稱的對象是電流調整電路120a,而元件編號120指稱的對象則是電流調整電路120a~120n中不特定的任意電流調整電路120。 Please note that the lowercase English index a~n in the component number used in the specification and the drawings is for convenience of referring to individual components, and is not intended to limit the number of the aforementioned components to a specific number. In the specification and the drawings, if an element number or signal number is used to indicate the index of the component number or signal number, it means that the component number or signal number is not specific to the component group or signal group. Any component or signal. For example, the component number 120a refers to the current adjustment circuit 120a, and the component number 120 refers to any current adjustment circuit 120 that is not specific among the current adjustment circuits 120a-120n.
電流調整電路120a位於第一時脈信號Vhck1在驅動模組110和閘極驅動模組103之間的信號路徑上。電流調整電路120b位於第二時脈信號Vhck2在驅動模組110和閘極驅動模組103之間的信號路徑上。電流調整電路120c位於固定電壓Vssg在驅動模組110和閘極驅動模組103之間的信號路徑上。電流調整電路120n位於起始脈衝信號Vst在驅動模組110和閘極驅動模組103之間的信號路徑上,其餘依此類推。 The current adjustment circuit 120a is located on the signal path between the driving module 110 and the gate driving module 103 of the first clock signal Vhck1. The current adjustment circuit 120b is located on the signal path between the driving module 110 and the gate driving module 103 of the second clock signal Vhck2. The current adjustment circuit 120c is located on a signal path between the drive module 110 and the gate drive module 103 at a fixed voltage Vssg. The current adjustment circuit 120n is located on the signal path between the start pulse signal Vst between the drive module 110 and the gate drive module 103, and so on.
亦即,電流調整電路120a~120n各自位於驅動模組110和閘極驅動模組103之間的多個信號路徑上 That is, the current adjustment circuits 120a-120n are respectively located on a plurality of signal paths between the driving module 110 and the gate driving module 103.
當電流調整電路120a~120n偵測到所對應的信號的信號電流的大小超過預設門檻值時,電流調整電路120a~120n會將對應的信號電流限制於預設門檻值以下,以防止閘極驅動模組103長時間承受過大電流。例如,當第一時脈信號Vhck1的第一信號電流Ihck1的大小超過預設門檻值時,電流調整電路120a會限制第一信號電流Ihck1。又例如,當第二時脈信號Vhck2的第二信號電流Ihck2的大小超過預設門檻值時,電流調整電路120b會限制第二信號電流Ihck2,其餘依此類推。 When the current adjustment circuits 120a-120n detect that the magnitude of the signal current of the corresponding signal exceeds the preset threshold, the current adjustment circuits 120a-120n limit the corresponding signal current to a preset threshold value to prevent the gate. The drive module 103 is subjected to excessive current for a long time. For example, when the magnitude of the first signal current Ihck1 of the first clock signal Vhck1 exceeds a preset threshold value, the current adjustment circuit 120a limits the first signal current Ihck1. For another example, when the magnitude of the second signal current Ihck2 of the second clock signal Vhck2 exceeds a preset threshold value, the current adjustment circuit 120b limits the second signal current Ihck2, and so on.
實作上,電流調整電路120a~120n可用比較器、開關電路、阻容電路(R-C circuit)和限流電阻來實現。 例如,當第一信號電流Ihck1的大小超過預設門檻值時,第一信號電流Ihck1會將阻容電路充電至特定電壓。而當比較器接收到前述特定電壓時,比較器會控制開關電路將第一信號電流Ihck1自原本的電流路徑切換至包含限流電阻的另一電流路徑,以限制第一信號電流Ihck1的大小。 In practice, the current adjustment circuits 120a-120n can be implemented by a comparator, a switch circuit, a resistor-capacitor circuit (R-C circuit), and a current limiting resistor. For example, when the magnitude of the first signal current Ihck1 exceeds a preset threshold, the first signal current Ihck1 charges the RC circuit to a specific voltage. When the comparator receives the aforementioned specific voltage, the comparator controls the switching circuit to switch the first signal current Ihck1 from the original current path to another current path including the current limiting resistor to limit the magnitude of the first signal current Ihck1.
以下將配合第2圖至第4圖進一步說明電流調整電路120a~120n的運作方式。為了敘述上的簡潔,將以電流調整電路120a為例進行說明。請參照第2圖,於閘極驅動模組103的製造或運作過程中,第一時脈信號Vhck1和第二時脈信號Vhck2的信號路徑之間可能會發生短路(亦即,產生短路路徑201)。 The operation of the current adjustment circuits 120a to 120n will be further described below in conjunction with FIGS. 2 to 4. For the sake of simplicity in the description, the current adjustment circuit 120a will be described as an example. Referring to FIG. 2, during the manufacture or operation of the gate driving module 103, a short circuit may occur between the signal paths of the first clock signal Vhck1 and the second clock signal Vhck2 (ie, the short circuit path 201 is generated). ).
若第一時脈信號Vhck1和第二時脈信號Vhck2的信號路徑之間沒有短路(亦即,不存在短路路徑201),第一信號電流Ihck1的波形會如第3圖所示。亦即,於第一信號電流Ihck1的每個脈衝期間Tp,第一信號電流Ihck1的大小的絕對值只會於第一時段T1中超過預設門檻值,並於第二時段T2和第三時段T3中低於門檻值。 If there is no short circuit between the signal paths of the first clock signal Vhck1 and the second clock signal Vhck2 (that is, there is no short circuit path 201), the waveform of the first signal current Ihck1 will be as shown in FIG. That is, during each pulse period Tp of the first signal current Ihck1, the absolute value of the magnitude of the first signal current Ihck1 will only exceed the preset threshold value in the first time period T1, and in the second time period T2 and the third time period. Below T3 is the threshold value.
由於第一信號電流Ihck1的大小的絕對值於第二時段T2皆低於預設門檻值,電流調整電路120a不會限制第一信號電流Ihck1。 Since the absolute value of the magnitude of the first signal current Ihck1 is lower than the preset threshold value in the second period T2, the current adjustment circuit 120a does not limit the first signal current Ihck1.
另一方面,若第一時脈信號Vhck1和第二時脈信號Vhck2的信號路徑之間發生短路(亦即,存在短路路徑201),第一信號電流Ihck1的波形會如第4圖所示。亦即,於第一信號電流Ihck1的每個脈衝期間Tp,第一信號電流 Ihck1的大小的絕對值會於第一時段中T1和第二時段T2中皆超過預設門檻值。 On the other hand, if a short circuit occurs between the signal paths of the first clock signal Vhck1 and the second clock signal Vhck2 (that is, there is a short circuit path 201), the waveform of the first signal current Ihck1 will be as shown in FIG. That is, during each pulse period Tp of the first signal current Ihck1, the first signal current The absolute value of the size of Ihck1 will exceed the preset threshold value in both the first time period T1 and the second time period T2.
在此情況下,於第二時段T2中,若第一信號電流Ihck1的大小的絕對值超過預設門檻值的持續時間超過預設時間長度,電流調整電路120a會於接下來的第三時段T3中限制第一信號電流Ihck1。 In this case, in the second time period T2, if the absolute value of the magnitude of the first signal current Ihck1 exceeds the preset threshold value for more than the preset time length, the current adjustment circuit 120a will be in the next third time period T3. The first signal current Ihck1 is limited.
換言之,電流調整電路120a會限制第一信號電流Ihck1的大小的絕對值低於預設門檻值,直到脈衝時間Tp結束。如此一來,於過電流事件發生時,過電流保護系統100可以即時降低閘極驅動模組103所承受的電流大小,降低閘極驅動模組103損壞的風險。 In other words, the current adjustment circuit 120a limits the absolute value of the magnitude of the first signal current Ihck1 to be lower than the preset threshold until the pulse time Tp ends. In this way, when an overcurrent event occurs, the overcurrent protection system 100 can instantly reduce the current received by the gate driving module 103 and reduce the risk of damage to the gate driving module 103.
另外,每當電流調整電路120a~120n限制所對應的信號電流,電流調整電路120a~120n會通知邏輯電路130發生過電流事件。而於顯示區105的一幀畫面中,若電流調整電路120a~120n中的任一電流調整電路120通知邏輯電路130發生過電流事件的次數,超過該電流調整電路120所對應的預設次數,邏輯電路130會調整儲存於儲存裝置140中的統計值,以累計發生過電流事件的總幀數。 In addition, each time the current adjustment circuits 120a-120n limit the corresponding signal current, the current adjustment circuits 120a-120n notify the logic circuit 130 of an overcurrent event. In one frame of the display area 105, if any one of the current adjustment circuits 120a-120n notifies the logic circuit 130 of the number of overcurrent events, the preset number of times corresponding to the current adjustment circuit 120 is exceeded. The logic circuit 130 adjusts the statistical values stored in the storage device 140 to accumulate the total number of frames in which the overcurrent event occurred.
值得注意的是,電流調整電路120a~120n各自的預設次數,對應於電流調整電路120a~120n各自接收的信號的類型。例如,用於接收第一時脈信號Vhck1的電流調整電路120a、用於接收第二時脈信號Vhck2電流調整電路120b、用於接收固定電壓Vssg的電流調整電路120c和用於接收起始脈衝信號Vst的電流調整電路120n所對應的預 設次數分別為32次、32次、1次和1次。 It should be noted that the respective preset times of the current adjustment circuits 120a to 120n correspond to the types of signals respectively received by the current adjustment circuits 120a to 120n. For example, a current adjustment circuit 120a for receiving the first clock signal Vhck1, a current adjustment circuit 120b for receiving the second clock signal Vhck2, a current adjustment circuit 120c for receiving the fixed voltage Vssg, and a signal for receiving the start pulse Pre-corresponding to the current adjustment circuit 120n of Vst The number of times is 32, 32, 1 and 1 respectively.
由於第一時脈信號Vhck1於每一幀畫面中有多個週期,而起始脈衝信號Vst在每一幀畫面中只有一個週期,所以電流調整電路120a所對應的預設次數(例如,32次)大於電流調整電路120n所對應的預設次數(例如,1次)。 Since the first clock signal Vhck1 has a plurality of periods in each frame picture, and the start pulse signal Vst has only one period in each frame picture, the preset number of times corresponding to the current adjustment circuit 120a (for example, 32 times) ) is greater than a preset number of times (for example, 1 time) corresponding to the current adjustment circuit 120n.
換言之,於顯示區105的一幀畫面中,若某一電流調整電路120所接收的信號的總週期數越多,該某一電流調整電路120所對應的預設次數也越大。 In other words, in a frame of the display area 105, if the total number of cycles of the signal received by the current adjustment circuit 120 is larger, the preset number of times corresponding to the certain current adjustment circuit 120 is larger.
而若邏輯電路130發現統計值超過預設幀數(例如,32幀),邏輯電路130會判定閘極驅動模組103發生過電流事件的幀數過多。此時,邏輯電路130會控制驅動模組110停止輸出所有傳送至閘極驅動模組103的信號。如此一來,可避免顯示面板101於使用過程中發生意外事故。例如,電線走火(electrical fire)。 If the logic circuit 130 finds that the statistical value exceeds the preset number of frames (for example, 32 frames), the logic circuit 130 determines that the number of frames of the overcurrent event generated by the gate driving module 103 is excessive. At this time, the logic circuit 130 controls the driving module 110 to stop outputting all signals transmitted to the gate driving module 103. In this way, the accident of the display panel 101 during use can be avoided. For example, electric fire.
在某些實施例中,統計值代表的是發生過電流事件的連續總幀數。若邏輯電路130於某一幀中沒有接收到來自電流調整電路120a~120n的通知(亦即,電流調整電路120a~120n沒有限制所對應的信號電流),邏輯電路130會將統計值歸零,以重新計算發生過電流事件的連續總幀數。 In some embodiments, the statistical value represents the number of consecutive total frames in which an overcurrent event occurs. If the logic circuit 130 does not receive the notification from the current adjustment circuits 120a-120n in a certain frame (that is, the current adjustment circuits 120a-120n do not limit the corresponding signal current), the logic circuit 130 resets the statistical value to zero. To recalculate the number of consecutive total frames of an overcurrent event.
第5a圖和第5b圖共同繪示了依據本揭示文件一實施例的過電流保護方法500簡化後的流程圖,其中過電流保護方法500適用於上述的過電流保護系統100。為了敘述上的簡潔,以下以電流調整電路120a和120b為例進行說明。 5a and 5b together illustrate a simplified flow diagram of an overcurrent protection method 500 in accordance with an embodiment of the present disclosure, wherein the overcurrent protection method 500 is applicable to the overcurrent protection system 100 described above. For the sake of simplicity in the description, the current adjustment circuits 120a and 120b will be described below as an example.
在第5a圖和第5b圖所繪示的流程圖中,位於一特定裝置所屬欄位中的流程,即代表由該特定裝置所進行的流程。例如,標記在「驅動模組110」欄位中的流程,代表由驅動模組110所進行的流程;標記在「電流調整電路120a」欄位中的流程,則代表由電流調整電路120a所進行的流程。 In the flowcharts shown in Figures 5a and 5b, the flow in the field to which a particular device belongs is representative of the flow performed by the particular device. For example, the flow marked in the "Drive Module 110" field represents the flow performed by the drive module 110; the flow marked in the "Current Adjustment Circuit 120a" field represents the current adjustment circuit 120a. Process.
在流程s502中,驅動模組110分別輸出第一時脈信號Vhck1和第二時脈信號Vhck2至電流調整電路120a和120b。電流調整電路120a執行流程s504以接收第一時脈信號Vhck1,並執行流程s506以判斷第一時脈信號Vhck1的第一信號電流Ihck1的大小的絕對值是否於預設時間長度內持續超過預設門檻值。 In the process s502, the driving module 110 outputs the first clock signal Vhck1 and the second clock signal Vhck2 to the current adjusting circuits 120a and 120b, respectively. The current adjustment circuit 120a performs the flow s504 to receive the first clock signal Vhck1, and executes the flow s506 to determine whether the absolute value of the magnitude of the first signal current Ihck1 of the first clock signal Vhck1 continues to exceed the preset time length. Threshold value.
若第一信號電流Ihck1沒有於預設時間長度內持續超過預設門檻值,電流調整電路120a重複執行流程s504。另一方面,若第一信號電流Ihck1於預設時間長度內持續超過預設門檻值,電流調整電路120a接著執行流程s508以限制第一信號流Ihck1,直到第一信號流Ihck1的脈衝周期結束。並且,電流調整電路120a會執行流程s510以傳送過電流事件通知至邏輯電路130。 If the first signal current Ihck1 does not continue to exceed the preset threshold for a preset length of time, the current adjustment circuit 120a repeats the execution of the flow s504. On the other hand, if the first signal current Ihck1 continues to exceed the preset threshold for a predetermined length of time, the current adjustment circuit 120a then performs a flow s508 to limit the first signal stream Ihck1 until the end of the pulse period of the first signal stream Ihck1. Also, the current adjustment circuit 120a performs the flow s510 to transmit an overcurrent event notification to the logic circuit 130.
電流調整電路120b執行流程s512以接收第二時脈信號Vhck2,並執行流程s514以判斷第二時脈信號Vhck2的第二信號電流Ihck2的大小的絕對值是否於預設時間長度內持續超過預設門檻值。 The current adjustment circuit 120b performs the flow s512 to receive the second clock signal Vhck2, and executes the flow s514 to determine whether the absolute value of the magnitude of the second signal current Ihck2 of the second clock signal Vhck2 continues to exceed the preset for a preset length of time. Threshold value.
若第二信號電流Ihck2沒有於預設時間長度內 持續超過預設門檻值,電流調整電路120b重複執行流程s512。另一方面,若第二信號電流Ihck2於預設時間長度內持續超過預設門檻值,電流調整電路120b接著執行流程s516以限制第二信號電流Ihck2,直到第二信號電流Ihck2的脈衝周期結束。並且,電流調整電路120b會執行流程s518以傳送過電流事件通知至邏輯電路130。 If the second signal current Ihck2 is not within the preset time length The current adjustment circuit 120b repeats the execution of the flow s512 until the preset threshold value is continuously exceeded. On the other hand, if the second signal current Ihck2 continues to exceed the preset threshold for a predetermined length of time, the current adjustment circuit 120b then performs a flow s516 to limit the second signal current Ihck2 until the end of the pulse period of the second signal current Ihck2. Also, current adjustment circuit 120b performs flow s518 to transmit an overcurrent event notification to logic circuit 130.
請參照第5b圖,邏輯電路130執行流程s520以接收來自電流調整電路120a或120b的過電流事件通知。接著,邏輯電路130會執行流程s522,以判斷來自電流調整電路120a的通知次數是否超過電流調整電路120a對應的預設次數(例如,32次),以及判斷來自電流調整電路120b的通知次數是否超過電流調整電路120b對應的預設次數(例如,32次)。 Referring to FIG. 5b, logic circuit 130 performs flow s520 to receive an overcurrent event notification from current adjustment circuit 120a or 120b. Next, the logic circuit 130 executes the flow s522 to determine whether the number of notifications from the current adjustment circuit 120a exceeds the preset number of times corresponding to the current adjustment circuit 120a (for example, 32 times), and determines whether the number of notifications from the current adjustment circuit 120b exceeds The current adjustment circuit 120b corresponds to a preset number of times (for example, 32 times).
於一幀畫面中,若來自電流調整電路120a的通知次數超過電流調整電路120a對應的預設次數,或是來自電流調整電路120b的通知次數超過電流調整電路120b對應的預設次數,邏輯電路130接著執行流程s524以調整統計值。如此一來,邏輯電路130便得以累計發生過電流事件的總幀數。 In one frame, if the number of notifications from the current adjustment circuit 120a exceeds the preset number of times corresponding to the current adjustment circuit 120a, or the number of notifications from the current adjustment circuit 120b exceeds the preset number of times corresponding to the current adjustment circuit 120b, the logic circuit 130 Flow s524 is then executed to adjust the statistical values. As a result, the logic circuit 130 can accumulate the total number of frames in which an overcurrent event occurs.
另一方面,若來自電流調整電路120a的通知次數沒有超過電流調整電路120a對應的預設次數,來自電流調整電路120b的通知次數也沒有超過電流調整電路120b對應的預設次數,邏輯電路130重複執行流程s520。 On the other hand, if the number of notifications from the current adjustment circuit 120a does not exceed the preset number of times corresponding to the current adjustment circuit 120a, the number of notifications from the current adjustment circuit 120b does not exceed the preset number of times corresponding to the current adjustment circuit 120b, and the logic circuit 130 repeats Flow s520 is performed.
接著,邏輯電路130執行流程s526以判斷統計 值是否超過預設幀數。若是,邏輯電路130會控制驅動模組110執行流程s528,以使驅動模組110停止輸出所有傳送至閘極驅動模組103的信號。若否,邏輯電路130重複執行流程s522。 Next, the logic circuit 130 executes the flow s526 to determine the statistics. Whether the value exceeds the preset number of frames. If so, the logic circuit 130 controls the driving module 110 to execute the process s528, so that the driving module 110 stops outputting all signals transmitted to the gate driving module 103. If not, the logic circuit 130 repeats the execution of the flow s522.
請注意,前述第5a圖和第5b圖的流程圖只是一示性的實施例,並非用於限制本發明的實施方式。 It should be noted that the flowcharts of the foregoing 5a and 5b are merely exemplary embodiments and are not intended to limit the embodiments of the present invention.
例如,流程s504~s510可以和流程s512~s518同時執行。 For example, the processes s504~s510 can be executed simultaneously with the processes s512~s518.
又例如,在某些實施例中,邏輯電路130在執行流程s520之前,會先判斷電流調整電路120a和120b是否於一幀畫面中皆沒有限制第一信號電流Ihck1和第二信號電流Ihck2。亦即,判斷閘極驅動模組103是否於一幀畫面中沒有發生過電流事件。若是,則邏輯電路130會將統計值歸零。 For another example, in some embodiments, before executing the process s520, the logic circuit 130 determines whether the current adjustment circuits 120a and 120b do not limit the first signal current Ihck1 and the second signal current Ihck2 in one frame. That is, it is determined whether the gate drive module 103 has not generated an overcurrent event in one frame of the screen. If so, logic circuit 130 will zero the statistical value.
由上述可知,過電流保護系統100和過電流保護方法500可以防止顯示面板101因長時間流經過大的電流(例如,短路電流)而損壞或是發生意外事故(例如,電線走火)。 As can be seen from the above, the overcurrent protection system 100 and the overcurrent protection method 500 can prevent the display panel 101 from being damaged by a large current (for example, a short-circuit current) due to a long time flow or an accident (for example, a wire fire).
在說明書及申請專利範圍中使用了某些詞彙來指稱特定的元件。然而,所屬技術領域中具有通常知識者應可理解,同樣的元件可能會用不同的名詞來稱呼。說明書及申請專利範圍並不以名稱的差異做為區分元件的方式,而是以元件在功能上的差異來做為區分的基準。在說明書及申請專利範圍所提及的「包含」為開放式的用語, 故應解釋成「包含但不限定於」。另外,「耦接」在此包含任何直接及間接的連接手段。因此,若文中描述第一元件耦接於第二元件,則代表第一元件可通過電性連接或無線傳輸、光學傳輸等信號連接方式而直接地連接於第二元件,或者通過其他元件或連接手段間接地電性或信號連接至該第二元件。 Certain terms are used throughout the description and claims to refer to particular elements. However, those of ordinary skill in the art should understand that the same elements may be referred to by different nouns. The specification and the scope of patent application do not use the difference in name as the way to distinguish the components, but the difference in function of the components as the basis for differentiation. The term "include" as mentioned in the specification and the scope of the patent application is an open term. Therefore, it should be interpreted as "including but not limited to". In addition, "coupled" includes any direct and indirect means of attachment herein. Therefore, if the first element is described as being coupled to the second element, the first element can be directly connected to the second element by electrical connection or wireless transmission, optical transmission or the like, or by other elements or connections. The means is indirectly electrically or signally connected to the second component.
以上僅為本發明的較佳實施例,凡依本發明請求項所做的均等變化與修飾,皆應屬本發明的涵蓋範圍。 The above are only the preferred embodiments of the present invention, and all changes and modifications made to the claims of the present invention are intended to be within the scope of the present invention.

Claims (16)

  1. 一種過電流保護系統,適用於一顯示面板,該顯示面板包含一閘極驅動陣列和一顯示區,該過電流保護系統包含:一驅動模組,用於提供一第一驅動信號至該閘極驅動陣列;一第一電流調整電路,耦接於該驅動模組和該閘極驅動陣列之間,其中該第一電流調整電路位於該第一驅動信號的一第一信號電流的電流路徑上;其中,於該第一信號電流的一脈衝期間,若該第一信號電流的大小的絕對值持續大於一預設門檻值且超過一預設時間長度,該第一電流調整電路限制該第一信號電流的大小的絕對值不大於該預設門檻值,直到該第一信號電流的該脈衝期間結束。 An overcurrent protection system is applicable to a display panel, the display panel includes a gate drive array and a display area, and the overcurrent protection system includes: a driving module, configured to provide a first driving signal to the gate a first current adjustment circuit is coupled between the driving module and the gate driving array, wherein the first current adjusting circuit is located on a current path of a first signal current of the first driving signal; The first current adjustment circuit limits the first signal during a pulse of the first signal current if the absolute value of the magnitude of the first signal current continues to be greater than a predetermined threshold and exceeds a predetermined length of time The absolute value of the magnitude of the current is not greater than the predetermined threshold until the end of the pulse period of the first signal current.
  2. 如請求項1的過電流保護系統,另包含:一邏輯電路,用於在該顯示區的每一幀畫面中,判斷該第一電流調整電路限制該第一信號電流的次數是否超過一預設次數;其中,於該每一幀畫面中,若該第一電流調整電路限制該第一該信號電流的次數大於該預設次數,該邏輯電路調整一統計值,以統計發生過電流情況的總幀數。 The overcurrent protection system of claim 1, further comprising: a logic circuit, configured to determine, in each frame of the display area, whether the number of times the first current adjustment circuit limits the first signal current exceeds a preset The number of times; wherein, in the frame of each frame, if the first current adjustment circuit limits the number of times of the first signal current to be greater than the preset number of times, the logic circuit adjusts a statistical value to count the total occurrence of the overcurrent condition The number of frames.
  3. 如請求項2的過電流保護系統,其中,當該統計值大於一預設幀數,該邏輯電路控制該驅動模組停 止輸出該第一驅動信號。 The overcurrent protection system of claim 2, wherein when the statistical value is greater than a predetermined number of frames, the logic circuit controls the driving module to stop The first driving signal is output.
  4. 如請求項3的過電流保護系統,其中,於該每一幀畫面中,若該第一電流調整電路沒有限制該第一信號電流的大小,該邏輯電路將該統計值歸零。 The overcurrent protection system of claim 3, wherein in the frame of each frame, if the first current adjustment circuit does not limit the magnitude of the first signal current, the logic circuit resets the statistical value to zero.
  5. 如請求項2的過電流保護系統,其中,該驅動模組提供一第二驅動信號至該閘極驅動陣列,該過電流保護系統另包含:一第二電流調整電路,耦接於該驅動模組和該閘極驅動陣列之間,其中該第二電流調整電路位於該第二驅動信號的一第二信號電流的電流路徑上;其中,於該第二信號電流的脈衝期間,若該第二信號電流的大小的絕對值持續大於該預設門檻值超過該預設時間長度,該第二電流調整電路限制該第二信號電流的大小的絕對值不大於該預設門檻值,直到該第二信號電流的該脈衝期間結束。 The overcurrent protection system of claim 2, wherein the driving module provides a second driving signal to the gate driving array, the overcurrent protection system further comprising: a second current adjusting circuit coupled to the driving mode Between the group and the gate drive array, wherein the second current adjustment circuit is located on a current path of a second signal current of the second drive signal; wherein, during the pulse of the second signal current, the second The absolute value of the magnitude of the signal current is continuously greater than the preset threshold value exceeding the preset time length, and the second current adjustment circuit limits the absolute value of the magnitude of the second signal current to be not greater than the preset threshold value until the second This pulse period of the signal current ends.
  6. 如請求項5的過電流保護系統,其中,於該每一幀畫面中,若該第一電流調整電路限制該第一信號電流的次數大於該預設次數,或是該第二電流調整電路限制該第二信號電流的次數大於該預設次數,該邏輯電路調整該統計值。 The overcurrent protection system of claim 5, wherein, in the frame of each frame, if the first current adjustment circuit limits the number of times of the first signal current to be greater than the preset number of times, or the second current adjustment circuit limits The number of times of the second signal current is greater than the preset number of times, and the logic circuit adjusts the statistical value.
  7. 如請求項2的過電流保護系統,其中,該 預設次數對應於該第一驅動信號於該每一幀畫面中的總週期數。 The overcurrent protection system of claim 2, wherein the The preset number of times corresponds to the total number of cycles of the first driving signal in each frame of the frame.
  8. 如請求項7的過電流保護系統,其中,若該第一驅動信號為用於使該閘極驅動陣列中的多個移位暫存器依序運作的時脈信號,該預設次數等於32,若該第一驅動信號為用於在該每一幀畫面開始時觸發該閘極驅動陣列的一起始脈衝信號,該預設次數等於1,若該第一驅動信號為固定電壓,該預設次數等於1。 The overcurrent protection system of claim 7, wherein the preset number of times is equal to 32 if the first driving signal is a clock signal for sequentially operating a plurality of shift registers in the gate driving array. If the first driving signal is a starting pulse signal for triggering the gate driving array at the beginning of each frame, the preset number of times is equal to 1, if the first driving signal is a fixed voltage, the preset The number of times is equal to 1.
  9. 一種過電流保護方法,適用於一顯示面板,該顯示面板包含一閘極驅動陣列和一顯示區,該過電流保護方法包含:提供一驅動模組,其中該驅動模組用於提供一第一驅動信號至該閘極驅動陣列;提供一第一電流調整電路,其中該第一電流調整電路耦接於該驅動模組和該閘極驅動陣列之間,且位於該第一驅動信號的一第一信號電流的電流路徑上;於該第一信號電流的脈衝期間,若該第一信號電流的大小的絕對值持續大於一預設門檻值超過一預設時間長度,利用該第一電流調整電路限制該第一信號電流的大小的絕對值不大於該預設門檻值,直到該第一信號電流的脈衝期間結束。 An overcurrent protection method is applicable to a display panel, the display panel includes a gate drive array and a display area, and the overcurrent protection method includes: providing a driving module, wherein the driving module is configured to provide a first Driving a signal to the gate driving array; providing a first current adjusting circuit, wherein the first current adjusting circuit is coupled between the driving module and the gate driving array, and is located at the first driving signal a current path of a signal current; during the pulse of the first signal current, if the absolute value of the magnitude of the first signal current continues to be greater than a predetermined threshold for more than a predetermined length of time, the first current adjustment circuit is utilized The absolute value of the magnitude of the first signal current is limited to be no greater than the preset threshold until the end of the pulse period of the first signal current.
  10. 如請求項9的過電流保護方法,另包含: 利用一邏輯電路於該顯示區的每一幀畫面中,判斷該第一電流調整電路限制該第一信號電流的次數是否超過一預設次數;於該每一幀畫面中,若該第一電流調整電路限制該第一該信號電流的次數大於該預設次數,利用該邏輯電路調整一統計值,以統計發生過電流情況的總幀數。 The overcurrent protection method of claim 9, further comprising: Using a logic circuit in each frame of the display area, determining whether the first current adjustment circuit limits the number of times of the first signal current exceeds a predetermined number of times; in the frame of each frame, if the first current The adjusting circuit limits the number of times of the first signal current to be greater than the preset number of times, and uses the logic circuit to adjust a statistical value to count the total number of frames in which an overcurrent condition occurs.
  11. 如請求項10的過電流保護方法,另包含:當該統計值大於一預設幀數,利用該邏輯電路控制該驅動模組停止輸出該第一驅動信號。 The overcurrent protection method of claim 10, further comprising: when the statistical value is greater than a predetermined number of frames, using the logic circuit to control the driving module to stop outputting the first driving signal.
  12. 如請求項11的過電流保護方法,其中,利用該邏輯電路調整該統計值的流程包含:於該每一幀畫面中,若該第一電流調整電路沒有限制該第一信號電流,利用該邏輯電路將該統計值歸零。 The overcurrent protection method of claim 11, wherein the process of adjusting the statistical value by using the logic circuit comprises: in the frame of each frame, if the first current adjustment circuit does not limit the first signal current, using the logic The circuit zeroes this statistic.
  13. 如請求項10的過電流保護方法,其中,該驅動模組提供一第二驅動信號至該閘極驅動陣列,該過電流保護方法另包含:提供一第二電流調整電路,其中該第二電流調整電路耦接於該驅動模組和該閘極驅動陣列之間,且該第二電流調整電路位於該第二驅動信號的一第二信號電流的電流路徑上;於該第二信號電流的脈衝期間,若該第二信號電流的大小的絕對值持續大於該預設門檻值超過該預設時間長 度,利用該第二電流調整電路限制該第二信號電流的大小的絕對值不大於該預設門檻值,直到該第二信號電流的脈衝期間結束。 The overcurrent protection method of claim 10, wherein the driving module provides a second driving signal to the gate driving array, the overcurrent protection method further comprising: providing a second current adjusting circuit, wherein the second current The adjustment circuit is coupled between the driving module and the gate driving array, and the second current adjusting circuit is located on a current path of a second signal current of the second driving signal; and the pulse of the second signal current During the period, if the absolute value of the magnitude of the second signal current continues to be greater than the preset threshold value exceeds the preset time length And using the second current adjustment circuit to limit the absolute value of the magnitude of the second signal current to be not greater than the preset threshold until the end of the pulse period of the second signal current.
  14. 如請求項13的過電流保護方法,其中,利用該邏輯電路調整該統計值的流程另包含:於該每一幀畫面中,若該第一電流調整電路限制該第一信號電流的次數大於該預設次數,或是該第二電流調整電路限制該第二信號電流的次數大於該預設次數,該邏輯電路調整該統計值。 The overcurrent protection method of claim 13, wherein the process of adjusting the statistical value by using the logic circuit further comprises: if the first current adjustment circuit limits the first signal current to be greater than the number of frames in the frame The logic circuit adjusts the statistical value by a preset number of times or when the second current adjustment circuit limits the second signal current to be greater than the preset number of times.
  15. 如請求項10的過電流保護方法,其中,該預設次數對應於該第一驅動信號於該每一幀畫面中的總週期數。 The overcurrent protection method of claim 10, wherein the preset number of times corresponds to a total number of cycles of the first driving signal in each frame of the frame.
  16. 如請求項15的過電流保護方法,其中,若該第一驅動信號為用於使該閘極驅動陣列中的多個移位暫存器依序運作的時脈信號,該預設次數等於32,若該第一驅動信號為用於在該每一幀畫面開始時觸發該閘極驅動陣列的一起始脈衝信號,該預設次數等於1,若該第一驅動信號為固定電壓,該預設次數等於1。 The overcurrent protection method of claim 15, wherein the preset number of times is equal to 32 if the first driving signal is a clock signal for sequentially operating a plurality of shift registers in the gate driving array. If the first driving signal is a starting pulse signal for triggering the gate driving array at the beginning of each frame, the preset number of times is equal to 1, if the first driving signal is a fixed voltage, the preset The number of times is equal to 1.
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