TWI759255B - Organic light-emitting diode display device and operating method thereof - Google Patents
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本發明係與顯示裝置有關，特別是關於一種有機發光二極體（OLED）顯示裝置及其運作方法。The present invention relates to display devices, and more particularly, to an organic light emitting diode (OLED) display device and an operation method thereof.
當有機發光二極體顯示螢幕點亮一段時間後，無論是紅色（R）、綠色（G）或藍色（B）的亮度均會有一定程度的衰減（老化）。為了消除此一衰減（老化），通常會採用例如去烙印（De-burning）的補償機制。When the organic light-emitting diode display screen is lit for a period of time, the brightness of red (R), green (G) or blue (B) will be attenuated (aging) to a certain extent. To eliminate this decay (aging), compensation mechanisms such as De-burning are often employed.
舉例而言，補償機制可透過偵測得到樣本的衰減曲線，再根據衰減曲線修正輸出的灰階來實現補償。然而，如圖1及圖2所示，在對照衰減曲線的過程，揮發性記憶體（例如隨機存取記憶體（Random Access Memory，RAM））需每隔一段時間（例如1秒）持續將當前的狀態（例如亮度、溫度、電流等）寫入至非揮發性記憶體（例如快閃記憶體（Flash））中，使得刷寫快閃記憶體之動作變得非常頻繁而容易出錯，尤其是在遇到異常掉電的情況下更為嚴重，甚至導致快閃記憶體需重頭開始記錄，亟待改善。For example, the compensation mechanism can realize the compensation by detecting the attenuation curve of the sample, and then correcting the output gray scale according to the attenuation curve. However, as shown in Figures 1 and 2, in the process of comparing the decay curve, the volatile memory (such as random access memory (RAM)) needs to keep the current The state (such as brightness, temperature, current, etc.) is written into non-volatile memory (such as flash memory (Flash)), which makes the action of flashing memory very frequent and error-prone, especially In the case of abnormal power failure, it is even more serious, and even causes the flash memory to start recording from scratch, which needs to be improved urgently.
因此，本發明提出一種有機發光二極體顯示裝置及其運作方法，藉以有效解決先前技術所遭遇到之上述問題。Therefore, the present invention provides an organic light emitting diode display device and an operation method thereof, so as to effectively solve the above-mentioned problems encountered in the prior art.
根據本發明之一較佳具體實施例為一種有機發光二極體顯示裝置。於此實施例中，有機發光二極體顯示裝置包括有機發光二極體面板、揮發性記憶體及非揮發性記憶體。揮發性記憶體耦接有機發光二極體面板且接收來自有機發光二極體面板之累積電流數據。非揮發性記憶體耦接揮發性記憶體且備份累積電流數據以供揮發性記憶體存取累積電流數據。累積電流數據係根據至少一閥值分為第一部分及第二部分。非揮發性記憶體包括主要記錄單元及次要記錄單元。主要記錄單元係以不擦除方式記錄第一部分且次要記錄單元係以可擦除方式記錄第二部分。A preferred embodiment according to the present invention is an organic light emitting diode display device. In this embodiment, the organic light emitting diode display device includes an organic light emitting diode panel, a volatile memory and a non-volatile memory. The volatile memory is coupled to the OLED panel and receives accumulated current data from the OLED panel. The non-volatile memory is coupled to the volatile memory and backs up the accumulated current data for the volatile memory to access the accumulated current data. The accumulated current data is divided into a first part and a second part according to at least one threshold. The non-volatile memory includes a primary recording unit and a secondary recording unit. The primary recording unit records the first portion in an erasable manner and the secondary recording unit records the second portion in an erasable manner.
於一實施例中，累積電流數據係根據包括該至少一閥值的一累積電流查找表分為第一部分及第二部分，當次要記錄單元記錄的第二部分達到該至少一閥值時，觸發主要記錄單元更新其記錄的第一部分。In one embodiment, the accumulated current data is divided into a first part and a second part according to an accumulated current look-up table including the at least one threshold value, and when the second part recorded by the secondary recording unit reaches the at least one threshold value, Triggers the primary record unit to update the first part of its record.
於一實施例中，當次要記錄單元出現異常時，則僅保留主要記錄單元記錄的第一部分，並將次要記錄單元記錄的第二部分清零。In one embodiment, when an abnormality occurs in the secondary recording unit, only the first part recorded in the primary recording unit is retained, and the second part recorded in the secondary recording unit is cleared.
於一實施例中，若揮發性記憶體的最小記錄單元具有n位元，則主要記錄單元及次要記錄單元的最小記錄單元分別具有k位元及（n-k）位元。In one embodiment, if the smallest recording unit of the volatile memory has n bits, the smallest recording units of the primary recording unit and the secondary recording unit have k bits and (n-k) bits, respectively.
於一實施例中，主要記錄單元於每次記錄第一部分時採取不擦除方式逐位元累加而可產生k個主要記錄點。In one embodiment, the main recording unit can generate k main recording points by accumulating bit by bit without erasing each time the first part is recorded.
於一實施例中，次要記錄單元於每次記錄第二部分時採取可擦除方式正常累加而可產生（2 n-k）個次要記錄點。 In one embodiment, the secondary recording unit can generate (2 nk ) secondary recording points by normal accumulation in an erasable manner each time the second part is recorded.
於一實施例中，主要記錄單元與次要記錄單元總共可產生（2 n-k）*k個記錄點。 In one embodiment, the primary recording unit and the secondary recording unit can generate (2 nk )*k recording points in total.
於一實施例中，當非揮發性記憶體刷寫異常時，可返回至最接近主要記錄點後繼續記錄。In one embodiment, when the non-volatile memory is abnormally written, the recording can be continued after returning to the closest main recording point.
於一實施例中，有機發光二極體顯示裝置還包括備份單元，耦接於揮發性記憶體與非揮發性記憶體之間，用以從揮發性記憶體將累積電流數據備份至非揮發性記憶體，以及從非揮發性記憶體將累積電流數據存取至揮發性記憶體。In one embodiment, the organic light emitting diode display device further includes a backup unit, coupled between the volatile memory and the non-volatile memory, for backing up the accumulated current data from the volatile memory to the non-volatile memory. memory, and accessing accumulated current data from the non-volatile memory to the volatile memory.
於一實施例中，有機發光二極體顯示裝置還包括補償單元，耦接於揮發性記憶體與有機發光二極體面板之間，當揮發性記憶體從非揮發性記憶體存取到累積電流數據時，補償單元根據累積電流數據計算出補償值並根據補償值對有機發光二極體面板進行補償。In one embodiment, the organic light emitting diode display device further includes a compensation unit coupled between the volatile memory and the organic light emitting diode panel, when the volatile memory is accessed from the non-volatile memory to the accumulation In the case of current data, the compensation unit calculates a compensation value according to the accumulated current data and compensates the organic light emitting diode panel according to the compensation value.
根據本發明之另一較佳具體實施例為一種有機發光二極體顯示裝置運作方法。於此實施例中，有機發光二極體顯示裝置包括有機發光二極體面板、揮發性記憶體及非揮發性記憶體。該方法包括下列步驟：揮發性記憶體接收來自有機發光二極體面板之累積電流數據；非揮發性記憶體備份累積電流數據以供揮發性記憶體存取累積電流數據，其中累積電流數據係根據至少一閥值分為第一部分及第二部分。非揮發性記憶體包括主要記錄單元及次要記錄單元；以及主要記錄單元係以不擦除方式記錄第一部分且次要記錄單元係以可擦除方式記錄第二部分。Another preferred embodiment according to the present invention is an operation method of an organic light emitting diode display device. In this embodiment, the organic light emitting diode display device includes an organic light emitting diode panel, a volatile memory and a non-volatile memory. The method includes the following steps: the volatile memory receives accumulated current data from the organic light emitting diode panel; the non-volatile memory backs up the accumulated current data for the volatile memory to access the accumulated current data, wherein the accumulated current data is based on At least one threshold is divided into a first part and a second part. The non-volatile memory includes a primary recording unit and a secondary recording unit; and the primary recording unit records the first portion in a non-erasable manner and the secondary recording unit records the second portion in an erasable manner.
於一實施例中，該方法係根據包括該至少一閥值的累積電流查找表將累積電流數據分為第一部分及第二部分，當次要記錄單元記錄的第二部分達到該至少一閥值時，該方法觸發主要記錄單元更新其記錄的第一部分。In one embodiment, the method divides the accumulated current data into a first part and a second part according to the accumulated current look-up table including the at least one threshold value, and when the second part recorded by the secondary recording unit reaches the at least one threshold value , the method triggers the primary record unit to update the first part of its record.
於一實施例中，當次要記錄單元出現異常時，則該方法僅保留主要記錄單元記錄的第一部分，並將次要記錄單元記錄的第二部分清零。In one embodiment, when the secondary recording unit is abnormal, the method only retains the first part of the primary recording unit record, and clears the second part of the secondary recording unit record.
於一實施例中，若揮發性記憶體的最小記錄單元具有n位元，則主要記錄單元及次要記錄單元的最小記錄單元分別具有k位元及（n-k）位元。In one embodiment, if the smallest recording unit of the volatile memory has n bits, the smallest recording units of the primary recording unit and the secondary recording unit have k bits and (n-k) bits, respectively.
於一實施例中，主要記錄單元於每次記錄第一部分時採取不擦除方式逐位元累加而可產生k個主要記錄點。In one embodiment, the main recording unit can generate k main recording points by accumulating bit by bit without erasing each time the first part is recorded.
於一實施例中，次要記錄單元於每次記錄第二部分時採取可擦除方式正常累加而可產生（2 n-k）個次要記錄點。 In one embodiment, the secondary recording unit can generate (2 nk ) secondary recording points by normal accumulation in an erasable manner each time the second part is recorded.
於一實施例中，主要記錄單元與次要記錄單元總共可產生（2 n-k）*k個記錄點。 In one embodiment, the primary recording unit and the secondary recording unit can generate (2 nk )*k recording points in total.
於一實施例中，當非揮發性記憶體刷寫異常時，該方法可返回至最接近主要記錄點後繼續記錄。In one embodiment, when the non-volatile memory is abnormally written, the method can return to the closest main recording point and continue recording.
於一實施例中，該方法還包括：從揮發性記憶體將累積電流數據備份至非揮發性記憶體；以及從非揮發性記憶體將累積電流數據存取至揮發性記憶體。In one embodiment, the method further includes: backing up the accumulated current data from the volatile memory to the non-volatile memory; and accessing the accumulated current data from the non-volatile memory to the volatile memory.
於一實施例中，該方法還包括：當揮發性記憶體從非揮發性記憶體存取到累積電流數據時，根據累積電流數據計算出補償值並根據補償值對有機發光二極體面板進行補償。In one embodiment, the method further includes: when the volatile memory accesses the accumulated current data from the non-volatile memory, calculating a compensation value according to the accumulated current data, and performing the operation on the organic light emitting diode panel according to the compensation value. compensate.
相較於先前技術，本發明提出的有機發光二極體顯示裝置及其運作方法係將非揮發性記憶體分為以不擦除方式記錄累積電流數據的第一部分的主要記錄單元與以可擦除方式記錄累積電流數據的第二部分的次要記錄單元，當次要記錄單元記錄的第二部分達到閥值時，才會觸發主要記錄單元更新其記錄的第一部分。一旦非揮發性記憶體出現例如刷寫異常之現象時，其可立即返回至最接近的主要記錄點後繼續記錄而無需從頭開始記錄，故可實現有機發光二極體顯示裝置的去烙印（De-burning）補償功能且能有效改善先前技術的各項缺點。Compared with the prior art, the organic light emitting diode display device and the operation method thereof proposed by the present invention divide the non-volatile memory into a main recording unit that records the first part of the accumulated current data in a non-erasable manner and an erasable memory unit. The secondary recording unit that records the second part of the accumulated current data in the exclusion mode will trigger the primary recording unit to update the first recorded part only when the second part recorded by the secondary recording unit reaches the threshold. Once the non-volatile memory has a phenomenon such as abnormal writing, it can immediately return to the closest main recording point and continue recording without starting recording from the beginning, so it can realize the de-branding of the organic light emitting diode display device (De -burning) compensation function and can effectively improve the shortcomings of the previous technology.
根據本發明之一較佳具體實施例為一種有機發光二極體顯示裝置。於此實施例中，有機發光二極體顯示裝置具有根據累積電流數據進行去烙印（De-burning）補償且在非揮發性記憶體之刷寫異常時能返回至最接近的主要記錄點後繼續記錄的功能，但不以此為限。A preferred embodiment according to the present invention is an organic light emitting diode display device. In this embodiment, the organic light emitting diode display device has de-burning compensation according to the accumulated current data and can return to the closest main recording point when the non-volatile memory is abnormally written to continue. documented functions, but not limited thereto.
請參照圖3，圖3繪示此實施例中之有機發光二極體顯示裝置的示意圖。如圖3所示，有機發光二極體顯示裝置3可包括有機發光二極體面板30、揮發性記憶體31、非揮發性記憶體32、更新單元33、備份單元34及補償單元35。更新單元33耦接於有機發光二極體面板30與揮發性記憶體31之間。備份單元34耦接於揮發性記憶體31與非揮發性記憶體32之間。補償單元35耦接於有機發光二極體面板30與揮發性記憶體31之間。Please refer to FIG. 3 , which is a schematic diagram of the organic light emitting diode display device in this embodiment. As shown in FIG. 3 , the organic light emitting
於實際應用中，揮發性記憶體（Volatile memory）31係指當電源供應中斷後，其所儲存的數據便會消失的記憶體，例如靜態隨機存取記憶體（Static Random Access Memory，SRAM）或動態隨機存取記憶體（Dynamic Random Access Memory，DRAM）等隨機存取記憶體（Random Access Memory，RAM），但不以此為限。非揮發性記憶體 （Non-Volatile Memory）32係指當電源供應中斷後，其所儲存的數據也不會消失，待重新供電後即能讀取其儲存的數據，例如快閃記憶體（Flash memory）或唯讀記憶體（Read-only memory，ROM）等，但不以此為限。In practical applications, the volatile memory (Volatile memory) 31 refers to a memory whose stored data will disappear when the power supply is interrupted, such as Static Random Access Memory (SRAM) or Random access memory (Random Access Memory, RAM) such as dynamic random access memory (Dynamic Random Access Memory, DRAM), but not limited thereto. Non-volatile memory (Non-Volatile Memory) 32 means that when the power supply is interrupted, the data stored in it will not disappear, and the data stored in it can be read after the power supply is restarted, such as flash memory (Flash memory). memory) or read-only memory (Read-only memory, ROM), etc., but not limited to this.
揮發性記憶體31透過更新單元33接收來自有機發光二極體面板30之累積電流數據並透過備份單元34將累積電流數據備份至非揮發性記憶體32。非揮發性記憶體32用以備份累積電流數據以供揮發性記憶體31透過備份單元34存取累積電流數據。當揮發性記憶體31自非揮發性記憶體32存取到累積電流數據時，補償單元35根據累積電流數據計算出補償值並根據補償值對有機發光二極體面板30進行去烙印（De-burning）補償。The
需說明的是，如圖4所示，非揮發性記憶體32可包括主要記錄單元32A及次要記錄單元32B。若揮發性記憶體31所儲存的來自有機發光二極體面板30之累積電流數據包括複數個數據區塊B，則揮發性記憶體31可根據至少一閥值（亦即累積電流值之閥值）將數據區塊B分為第一部分B1與第二部分B2後，分別將第一部分B1與第二部分B2備份至非揮發性記憶體32的主要記錄單元32A與次要記錄單元32B。其中，主要記錄單元32A係以不擦除方式逐位元累加來記錄第一部分B1且次要記錄單元32B係以可擦除方式正常累加來記錄第二部分B2。It should be noted that, as shown in FIG. 4 , the
舉例而言，如圖5所示，非揮發性記憶體32的主要記錄單元32A所採用的以不擦除方式（亦即不擦除式編碼）來記錄第一部分B1，例如從111……111依序逐位元累加為111……110、111……100、111……000、…、110……000、100……000而直至000……000為止，但不以此為限。For example, as shown in FIG. 5 , the
於實際應用中，揮發性記憶體31可根據包括至少一閥值（亦即累積電流值之閥值）的累積電流查找表（例如圖6）將其儲存的累積電流數據分為第一部分B1及第二部分B2後，分別將第一部分B1及第二部分B2備份至非揮發性記憶體32的主要記錄單元32A及次要記錄單元32B。當非揮發性記憶體32的次要記錄單元32B記錄的第二部分B2達到任一累積電流值之閥值時，才會觸發非揮發性記憶體32的主要記錄單元32A更新其記錄的第一部分B1（例如從111……111更新為111……110，但不以此為限）。In practical applications, the
當非揮發性記憶體32的次要記錄單元32B出現例如刷寫異常的現象時，非揮發性記憶體32僅會保留主要記錄單元32A以不擦除方式記錄的第一部分B1，並將次要記錄單元32B以可擦除方式記錄的第二部分B2清零。When the
請參照圖6，圖6繪示累積電流值（閥值）對應編碼的查找表的一實施例。如圖6所示，假設對應於非揮發性記憶體32的主要記錄單元32A的編碼0~7的累積電流值（閥值）分別為0、10000、20000、30000、40000、50000、60000、70000，則揮發性記憶體31所儲存的累積電流值可根據此累積電流查找表分為第一部分B1及第二部分B2後分別備份至非揮發性記憶體32的主要記錄單元32A及次要記錄單元32B。當次要記錄單元32B所記錄的第二部分B2達到至少一閥值時，才會觸發主要記錄單元32A更新其記錄的第一部分B1。Please refer to FIG. 6 . FIG. 6 illustrates an embodiment of a look-up table of codes corresponding to accumulated current values (threshold values). As shown in FIG. 6 , it is assumed that the accumulated current values (threshold values) of
舉例而言，當累積電流值為12500時，由於累積電流值12500介於閥值10000與閥值20000之間，並且閥值10000對應於編碼1以及累積電流值12500超出閥值10000的超出電流值為2500，因此，累積電流值12500可分為第一部分B1=1與第二部分B2=2500，亦即主要記錄單元32A所記錄的第一部分B1為1且次要記錄單元32B所記錄的第二部分B2為2500。接著，當累積電流值持續累積至20050時，由於20050介於閥值20000與閥值30000之間，並且閥值20000對應於編碼2以及累積電流值20050超出閥值20000的超出電流值為50，因此，累積電流值20050可分為第一部分B1=2與第二部分B2=50，亦即主要記錄單元32A會將其記錄的第一部分B1從原本的1更新為2且次要記錄單元32B所記錄的第二部分B2為50。其餘可依此類推，於此不另行贅述。For example, when the accumulated current value is 12500, since the accumulated current value of 12500 is between the threshold value of 10000 and the threshold value of 20000, and the threshold value of 10000 corresponds to code 1 and the accumulated current value of 12500 exceeds the threshold value of 10000 is 2500, therefore, the accumulated current value 12500 can be divided into the first part B1=1 and the second part B2=2500, that is, the first part B1 recorded by the
請參照圖7，於一實施例中，假設揮發性記憶體31所儲存的是32位元的數據區塊B，則其可例如分為16位元的第一部分B1及16位元的第二部分B2後分別備份至非揮發性記憶體32的主要記錄單元32A及次要記錄單元32B，但不以此為限。Referring to FIG. 7 , in an embodiment, if the
請參照圖8，於另一實施例中，假設揮發性記憶體31所儲存的是n位元的數據區塊B，則其可例如分為k位元的第一部分B1及（n-k）位元的第二部分B2後分別備份至非揮發性記憶體32的主要記錄單元32A及次要記錄單元32B。其中，n與k均為正整數且n大於k。Referring to FIG. 8 , in another embodiment, assuming that the
需說明的是，非揮發性記憶體32的主要記錄單元32A於每次記錄k位元的第一部分B1時係採取不擦除方式逐位元累加而可產生k個主要記錄點。非揮發性記憶體32的次要記錄單元32B於每次記錄（n-k）位元的第二部分B2時採取可擦除方式正常累加而可產生（2
n-k）個次要記錄點。因此，非揮發性記憶體32的主要記錄單元32A與次要記錄單元32A總共應可產生（2
n-k）*k個記錄點，但不以此為限。
It should be noted that the
舉例而言，如圖9所示，在累計電流記錄過程中，圖8中的非揮發性記憶體32可透過以不擦除方式記錄的主要記錄單元32A形成k個主要記錄點且可透過以擦除方式記錄的次要記錄單元32B形成兩相鄰主要記錄點之間的（2
n-k-1）個次要記錄點，但不以此為限。至於圖10則係繪示不同的時間累計閾值與其相對應的恢復點的值之一實施例，但不以此為限。
For example, as shown in FIG. 9 , in the process of accumulating current recording, the
根據本發明之另一較佳具體實施例為一種有機發光二極體顯示裝置運作方法。於此實施例中，有機發光二極體顯示裝置包括有機發光二極體面板、揮發性記憶體及非揮發性記憶體。揮發性記憶體係耦接於有機發光二極體面板與非揮發性記憶體之間。非揮發性記憶體包括主要記錄單元及次要記錄單元。Another preferred embodiment according to the present invention is an operation method of an organic light emitting diode display device. In this embodiment, the organic light emitting diode display device includes an organic light emitting diode panel, a volatile memory and a non-volatile memory. The volatile memory system is coupled between the organic light emitting diode panel and the non-volatile memory. The non-volatile memory includes a primary recording unit and a secondary recording unit.
有機發光二極體顯示裝置運作方法可包括下列步驟：揮發性記憶體接收來自有機發光二極體面板之累積電流數據；非揮發性記憶體備份累積電流數據以供揮發性記憶體存取累積電流數據，其中累積電流數據係根據至少一閥值分為第一部分及第二部分；以及非揮發性記憶體的主要記錄單元係以不擦除方式記錄第一部分且非揮發性記憶體的次要記錄單元係以可擦除方式記錄第二部分。The operation method of the organic light emitting diode display device may include the following steps: the volatile memory receives the accumulated current data from the organic light emitting diode panel; the non-volatile memory backs up the accumulated current data for the volatile memory to access the accumulated current data, wherein the accumulated current data is divided into a first part and a second part according to at least one threshold; and the primary recording unit of the non-volatile memory records the first part in a non-erasing manner and the secondary recording of the non-volatile memory The cell system records the second part in an erasable manner.
於一實施例中，該方法還可包括：從揮發性記憶體將累積電流數據備份至非揮發性記憶體；從非揮發性記憶體將累積電流數據存取至揮發性記憶體；以及當揮發性記憶體從非揮發性記憶體存取到累積電流數據時，根據累積電流數據計算出補償值並根據補償值對有機發光二極體面板進行補償，但不以此為限。In one embodiment, the method may further include: backing up the accumulated current data from the volatile memory to the non-volatile memory; accessing the accumulated current data from the non-volatile memory to the volatile memory; and when volatile When the volatile memory accesses the accumulated current data from the non-volatile memory, a compensation value is calculated according to the accumulated current data, and the organic light emitting diode panel is compensated according to the compensation value, but not limited thereto.
於實際應用中，該方法可根據包括至少一閥值的累積電流查找表將累積電流數據分為第一部分及第二部分，當次要記錄單元記錄的第二部分達到至少一閥值時，該方法會觸發主要記錄單元更新其記錄的第一部分。當次要記錄單元出現異常時，則該方法僅會保留主要記錄單元記錄的第一部分，並將次要記錄單元記錄的第二部分清零，但不以此為限。In practical applications, the method can divide the accumulated current data into a first part and a second part according to the accumulated current look-up table including at least one threshold value, and when the second part recorded by the secondary recording unit reaches at least one threshold value, the The method triggers the main record unit to update the first part of its record. When an exception occurs in the secondary recording unit, the method will only keep the first part of the primary recording unit record, and clear the second part of the secondary recording unit record, but not limited to this.
請參照圖11，圖11繪示本發明之另一具體實施例中之有機發光二極體顯示裝置運作方法的流程圖。如圖11所示，有機發光二極體顯示裝置運作方法包括下列步驟：Please refer to FIG. 11 . FIG. 11 is a flowchart illustrating an operation method of an organic light emitting diode display device according to another embodiment of the present invention. As shown in FIG. 11 , the operation method of the organic light emitting diode display device includes the following steps:
步驟S10：接收/解碼數據（亦即累積電流數據）；Step S10: Receive/decode data (ie, accumulated current data);
步驟S11：判斷數據是否異常?Step S11: Determine whether the data is abnormal?
若步驟S11之判斷結果為是，則執行步驟S14：更新主要記錄單元記錄的第一部分並清零次要記錄單元記錄的第二部分；If the judgment result of step S11 is yes, then execute step S14: update the first part of the primary recording unit record and clear the second part of the secondary recording unit record;
若步驟S11之判斷結果為否，則執行步驟S12：根據步驟S13之DBN運算結果來進行數據刷新；If the judgment result of step S11 is no, then execute step S12: perform data refresh according to the DBN operation result of step S13;
在步驟S12之後，執行步驟S15：根據步驟S16之參照查找表來判斷是否為主記錄點?After step S12, step S15 is executed: according to the reference lookup table in step S16, it is judged whether it is the main record point?
若步驟S15之判斷結果為是，則執行步驟S17：更新主要記錄單元記錄的第一部分；If the judgment result of step S15 is yes, then execute step S17: update the first part of the main recording unit record;
若步驟S15之判斷結果為否，則執行步驟S18：更新次要記錄單元記錄的第二部分；以及If the judgment result of step S15 is no, then execute step S18: update the second part of the secondary record unit record; and
在步驟S17及S18之後，執行步驟S19：編碼/輸出數據。After steps S17 and S18, step S19: encoding/outputting data is performed.
於一實施例中，若揮發性記憶體的最小記錄單元具有n位元，則主要記錄單元及次要記錄單元的最小記錄單元分別具有k位元及（n-k）位元。其中，主要記錄單元於每次記錄第一部分時採取不擦除方式逐位元累加而可產生k個主要記錄點；次要記錄單元於每次記錄第二部分時採取可擦除方式正常累加而可產生（2 n-k）個次要記錄點。因此，主要記錄單元與次要記錄單元總共可產生（2 n-k）*k個記錄點。 In one embodiment, if the smallest recording unit of the volatile memory has n bits, the smallest recording units of the primary recording unit and the secondary recording unit have k bits and (nk) bits, respectively. Among them, the main recording unit adopts the non-erasing method to accumulate bit by bit each time the first part is recorded, and can generate k main recording points; the secondary recording unit adopts the erasable method to normally accumulate each time the second part is recorded. (2 nk ) secondary record points can be generated. Therefore, the primary recording unit and the secondary recording unit can generate (2 nk )*k recording points in total.
當非揮發性記憶體出現例如刷寫異常的現象時，該方法可返回至最接近主要記錄點後繼續記錄。舉例而言，如圖12所示，當非揮發性記憶體在累計電流記錄過程中出現刷寫異常時，由於此異常係出現於主要記錄點MP2與MP3之間，故該方法可返回至最接近的主要記錄點MP2後繼續記錄而無需再從頭開始記錄，但不以此為限。When the non-volatile memory has a phenomenon such as abnormal flashing, the method can return to the closest main recording point and continue recording. For example, as shown in FIG. 12, when the non-volatile memory has a flashing abnormality during the accumulation current recording process, since the abnormality occurs between the main recording points MP2 and MP3, the method can return to the most After approaching the main recording point MP2, continue recording without starting recording from the beginning, but not limited to this.
相較於先前技術，本發明提出的有機發光二極體顯示裝置及其運作方法係將非揮發性記憶體分為以不擦除方式記錄累積電流數據的第一部分的主要記錄單元與以可擦除方式記錄累積電流數據的第二部分的次要記錄單元，當次要記錄單元記錄的第二部分達到閥值時，才會觸發主要記錄單元更新其記錄的第一部分。一旦非揮發性記憶體出現例如刷寫異常之現象時，其可立即返回至最接近的主要記錄點後繼續記錄而無需從頭開始記錄，故可實現有機發光二極體顯示裝置的去烙印（De-burning）補償功能且能有效改善先前技術的各項缺點。Compared with the prior art, the organic light emitting diode display device and the operation method thereof proposed by the present invention divide the non-volatile memory into a main recording unit that records the first part of the accumulated current data in a non-erasable manner and an erasable memory unit. The secondary recording unit that records the second part of the accumulated current data in the exclusion mode will trigger the primary recording unit to update the first recorded part only when the second part recorded by the secondary recording unit reaches the threshold. Once the non-volatile memory has a phenomenon such as abnormal writing, it can immediately return to the closest main recording point and continue recording without starting recording from the beginning, so it can realize the de-branding of the organic light emitting diode display device (De -burning) compensation function and can effectively improve the shortcomings of the previous technology.
R1:儲存區
R2:儲存區
S1:扇區
S2:扇區
a:步驟
b:步驟
c:步驟
d:步驟
3:有機發光二極體顯示裝置
30:有機發光二極體面板
31:揮發性記憶體
32:非揮發性記憶體
32A:主要記錄單元
32B:次要記錄單元
33:更新單元
34:備份單元
35:補償單元
B:數據區塊
B1:第一部分
B2:第二部分
MP1~MPK:主要記錄點
SP1~SP（2
n-k-1）:次要記錄點
LUT_1~LUT_K:恢復點
S10~S19:步驟R1: Storage area R2: Storage area S1: Sector S2: Sector a: Step b: Step c: Step d: Step 3: OLED display device 30: OLED panel 31: Volatile memory Bank 32:
圖1繪示先前技術進行去烙印（De-burning）補償時需頻繁刷寫快閃記憶體（Flash）的示意圖。FIG. 1 is a schematic diagram illustrating the need to frequently rewrite the flash memory (Flash) when performing de-burning compensation in the prior art.
圖2A及圖2B分別繪示正常及異常刷寫快閃記憶體的流程的示意圖。FIG. 2A and FIG. 2B are schematic diagrams showing the flow of normal and abnormal flash memory flashing, respectively.
圖3繪示本發明之一具體實施例中之有機發光二極體顯示裝置3的示意圖。FIG. 3 is a schematic diagram of an organic light emitting
圖4繪示將揮發性記憶體31儲存的數據區塊B分為第一部分B1及第二部分B2後分別備份至非揮發性記憶體32的主要記錄單元32A及次要記錄單元32B的示意圖。4 is a schematic diagram of the
圖5繪示非揮發性記憶體32的主要記錄單元32A採用不擦除式編碼的示意圖。FIG. 5 is a schematic diagram illustrating that the
圖6繪示累積電流值對應編碼的查找表的一實施例。FIG. 6 shows an embodiment of a look-up table of codes corresponding to accumulated current values.
圖7繪示將揮發性記憶體31儲存的32位元的數據區塊B分為16位元的第一部分B1及16位元的第二部分B2後分別備份至非揮發性記憶體32的主要記錄單元32A及次要記錄單元32B的示意圖。FIG. 7 shows the main data block B of the 32-bit data stored in the
圖8繪示將揮發性記憶體31儲存的n位元的數據區塊B分為k位元的第一部分B1及（n-k）位元的第二部分B2後分別備份至非揮發性記憶體32的主要記錄單元32A及次要記錄單元32B的示意圖。FIG. 8 shows that the n-bit data block B stored in the
圖9繪示圖8中的非揮發性記憶體32透過以不擦除方式記錄的主要記錄單元32A及以擦除方式記錄的次要記錄單元32B在累計電流記錄過程中形成k個主要記錄點及兩相鄰主要記錄點之間的（2
n-k-1）個次要記錄點的示意圖。
FIG. 9 shows that the
圖10繪示時間累計閾值與相對應的恢復點的值之一實施例。FIG. 10 illustrates one embodiment of the time accumulation threshold and the corresponding recovery point value.
圖11繪示本發明之另一具體實施例中之有機發光二極體顯示裝置運作方法的流程圖。FIG. 11 is a flowchart illustrating an operation method of an organic light emitting diode display device according to another embodiment of the present invention.
圖12繪示當非揮發性記憶體在累計電流記錄過程中出現異常時可返回至最接近的主要記錄點MP2後繼續記錄的示意圖。FIG. 12 is a schematic diagram illustrating that the non-volatile memory can return to the closest main recording point MP2 and continue recording when an abnormality occurs during the accumulated current recording process.
31:揮發性記憶體 31: Volatile memory
32:非揮發性記憶體 32: Non-volatile memory
32A:主要記錄單元 32A: Main recording unit
32B:次要記錄單元 32B: Secondary Recording Unit
B:數據區塊 B: data block
B1:第一部分
B1:
B2:第二部分 B2: Part II
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| US7321348B2 (en) * | 2000-05-24 | 2008-01-22 | Eastman Kodak Company | OLED display with aging compensation |
| TW200526065A (en) * | 2003-11-25 | 2005-08-01 | Eastman Kodak Co | An OLED display with aging compensation |
| TWI364234B (en) * | 2003-11-25 | 2012-05-11 | Global Oled Technology Llc | A method of aging compensation in an oled display |
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