TWI433124B - Color sequential display and luminance adjusting method for backlight module thereof - Google Patents
Color sequential display and luminance adjusting method for backlight module thereof Download PDFInfo
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Description
本發明係相關於一種顯示器與相關之背光模組發光亮度調整方法,尤指一種可降低背光模組之各原色發光二極體老化與環境光對背光模組發出光線之亮度的影響之顯示器與相關之背光模組發光亮度調整方法。The present invention relates to a display and related backlight module illumination brightness adjustment method, and more particularly to a display capable of reducing the aging of each primary color LED of the backlight module and the effect of ambient light on the brightness of the backlight module. Related backlight module brightness adjustment method.
傳統的液晶顯示器主要是以彩色濾光片(Color Filter)做為媒介濾出不同原色,以達成全彩(Full Color)顯示的目的,然而由於過程中需要濾除光線,故此類液晶顯示器所產生之大部份發光亮度會被彩色濾光片所濾除,而造成發光效率低下的狀況。因此,使用色序法的顯示器(簡稱色序式顯示器)被用來取代使用彩色濾光片的顯示器以維持較高的發光效率。由於色序法顯示器係以短時間內依照一預定色序發出對應於不同原色之光線的緣故,因此可利用人類的視覺暫留現象達成混成色彩並實現全彩顯示的目的,且由於不需使用彩色濾光片濾除光線,因此其發光效率係明顯高於傳統使用彩色濾光片的液晶顯示器。The traditional liquid crystal display mainly uses a color filter as a medium to filter out different primary colors to achieve a full color display. However, since the light needs to be filtered out during the process, such a liquid crystal display is produced. Most of the illuminance is filtered by the color filter, resulting in a low luminous efficiency. Therefore, a display using a color sequential method (referred to as a color sequential display) is used instead of a display using a color filter to maintain high luminous efficiency. Since the color sequential display emits light corresponding to different primary colors in a predetermined color sequence in a short time, the human visual persistence phenomenon can be utilized to achieve the mixed color and realize the full color display, and since it is not required to be used The color filter filters out light, so its luminous efficiency is significantly higher than that of a conventional liquid crystal display using a color filter.
一般實施色序式顯示器時,經由發光二極體本身的操作特性,可以使得色序式發光二極體顯示器所包含之背光模組對於各種原色(亦即紅、綠、藍三原色)在顯示上的亮度變化對溫度的關係呈線性變化。然而,當一般的色序式顯示器所包含的背光模組經過長時間的使用後,發光二極體本身會出現老化的現象而使其發出的亮度逐漸低於其所需亮度;除此以外,長時間的使用也會造成發光二極體的特性發生變化而使其發光亮度與溫度變化逐漸轉為較難以掌控的非線性變化。如此一來,一般經過長時間使用的色序式顯示器在顯示品質上除了會出現亮度不足的情況以外,還會發生因上述非線性變化而造成發光亮度不穩定的情形發生。Generally, when the color sequential display is implemented, the backlight module included in the color sequential LED display can be displayed on various primary colors (ie, red, green, and blue primary colors) through the operating characteristics of the light emitting diode itself. The change in brightness varies linearly with respect to temperature. However, when the backlight module included in the general color sequential display is used for a long period of time, the light emitting diode itself may be aged to gradually emit a brightness lower than the required brightness; Long-term use will also cause the characteristics of the light-emitting diode to change, so that the brightness and temperature changes of the light-emitting diode gradually turn into a non-linear change that is difficult to control. As a result, in general, the color-sequential display that has been used for a long time has a situation in which the brightness is insufficient due to the above-described nonlinear change in addition to the case where the brightness is insufficient.
本發明係揭露一種顯示器。該顯示器係包含一背光模組、一時序控制器、及一顯示面板。該時序控制器係包含一感應控制器及一色序顯示驅動控制器。該感應控制器係儲存有一對照表。該感應控制器包含一色序感應單元及一發光二極體控制單元。該色序感應單元係用來接收該背光模組包含之一光感應器及一溫度感應器各自所偵測到之一光感應訊號與一溫度感應訊號。該發光二極體控制單元係用來根據該對照表、該光感應訊號、及該溫度感應訊號,調整該背光模組對應於至少一種原色所使用之一發光亮度。該色序顯示驅動控制器係用來根據一影像資料產生一同步訊號。該同步訊號係對應於該背光模組顯示該至少一種原色時之一預設色序。該顯示面板係用來根據該發光二極體控制單元所調整之該發光亮度來顯示該影像資料。該對照表係儲存有該背光模組對應於該至少一種原色及一溫度時所使用之一標準亮度。The invention discloses a display. The display comprises a backlight module, a timing controller, and a display panel. The timing controller includes an inductive controller and a color sequential display drive controller. The inductive controller stores a look-up table. The sensing controller comprises a color sequential sensing unit and a light emitting diode control unit. The color sequence sensing unit is configured to receive a light sensing signal and a temperature sensing signal detected by each of the light sensor and the temperature sensor. The LED control unit is configured to adjust, according to the comparison table, the photo-sensing signal, and the temperature sensing signal, a brightness of light emitted by the backlight module corresponding to at least one primary color. The color sequence display drive controller is configured to generate a synchronization signal based on an image data. The synchronization signal corresponds to one of the preset color sequences when the backlight module displays the at least one primary color. The display panel is configured to display the image data according to the brightness of the light adjusted by the LED control unit. The comparison table stores one standard brightness used by the backlight module corresponding to the at least one primary color and a temperature.
本發明係揭露一種顯示器。該顯示器係包含一背光模組、一微處理器、及一顯示面板。該微處理器係儲存有一對照表。該微處理器係用來接收該背光模組之一光感應器與一溫度感應器所偵測到之一光感應訊號與一溫度感應訊號、及用來根據該對照表、該光感應訊號、及該溫度感應訊號,調整該背光模組對應於至少一種原色所使用之一發光亮度。該色序顯示驅動控制器係用來根據一影像資料產生一同步訊號。該同步訊號係對應於該背光模組顯示該至少一種原色時之一預設色序。該顯示面板係用來根據該微處理器所調整之該發光亮度來顯示該影像資料。該對照表係儲存有該背光模組對應於該至少一種原色、該背光模組所使用之一目標亮度值、及一溫度時所使用之該標準亮度。The invention discloses a display. The display comprises a backlight module, a microprocessor, and a display panel. The microprocessor stores a look-up table. The microprocessor is configured to receive a light sensing signal and a temperature sensing signal detected by a light sensor and a temperature sensor of the backlight module, and to use the light sensing signal according to the comparison table. And the temperature sensing signal, adjusting the brightness of the backlight module to be used corresponding to at least one primary color. The color sequence display drive controller is configured to generate a synchronization signal based on an image data. The synchronization signal corresponds to one of the preset color sequences when the backlight module displays the at least one primary color. The display panel is configured to display the image data according to the brightness of the light adjusted by the microprocessor. The comparison table stores the backlight module corresponding to the at least one primary color, a target brightness value used by the backlight module, and the standard brightness used in a temperature.
本發明係揭露一種背光模組之發光亮度的調整方法。該方法包含偵測一背光模組之一溫度;根據該溫度與包含該背光模組之一顯示器所使用之一目標亮度值,查詢一對照表以找出一標準亮度;根據一分時偵測機制與該顯示器之一預設色序,偵測該背光模組對應於至少一種原色所使用之一實際發光亮度;將該實際發光亮度與該標準亮度進行比較;及根據比較該實際發光亮度與該標準亮度之一結果,調整該實際發光亮度。該對照表係儲存有該標準亮度,且該標準亮度係為該背光模組對應於該至少一種原色及一溫度時所使用。The invention discloses a method for adjusting the brightness of a backlight module. The method includes detecting a temperature of a backlight module, and querying a comparison table to find a standard brightness according to the temperature and a target brightness value used by the display including the backlight module; a mechanism and a preset color sequence of the display, detecting an actual light-emitting brightness of the backlight module corresponding to at least one primary color; comparing the actual light-emitting brightness with the standard brightness; and comparing the actual light-emitting brightness with As a result of one of the standard brightness, the actual brightness of the light is adjusted. The comparison table stores the standard brightness, and the standard brightness is used when the backlight module corresponds to the at least one primary color and a temperature.
在說明書及後續的申請專利範圍當中使用了某些詞彙來指稱特定的元件。所屬領域中具有通常知識者應可理解,製造商可能會用不同的名詞來稱呼同樣的元件。本說明書及後續的申請專利範圍並不以名稱的差異來作為區別元件的方式,而是以元件在功能上的差異來作為區別的基準。在通篇說明書及後續的請求項當中所提及的「包含」係為一開放式的用語,故應解釋成「包含但不限定於」。此外,「電性連接」一詞在此係包含任何直接及間接的電氣連接手段。因此,若文中描述一第一裝置電性連接於一第二裝置,則代表該第一裝置可直接連接於該第二裝置,或透過其他裝置或連接手段間接地連接至該第二裝置。Certain terms are used throughout the description and following claims to refer to particular elements. It should be understood by those of ordinary skill in the art that manufacturers may refer to the same elements by different nouns. The scope of this specification and the subsequent patent application do not use the difference of the names as the means for distinguishing the elements, but the differences in the functions of the elements as the basis for the distinction. The term "including" as used throughout the specification and subsequent claims is an open term and should be interpreted as "including but not limited to". In addition, the term "electrical connection" is used herein to include any direct and indirect electrical connection. Therefore, if a first device is electrically connected to a second device, it means that the first device can be directly connected to the second device or indirectly connected to the second device through other devices or connection means.
為了解決上述一般色序式顯示器經過長時間使用後所衍生的各種缺點,本發明係揭露一種降低上述發光二極體所產生之老化現象的色序式顯示器與相關之背光模組發光亮度調整方法。本發明所揭露之色序式顯示器與相關之背光模組發光亮度調整方法除了將色序式顯示器之溫度作為調整不同原色發光二極體之亮度時的考量條件之一以外,亦將色序式顯示器所配置之背光模組受到其周遭亮度(亦即環境光)的影響作為考量條件之一,以使得背光模組在決定其發光亮度時可以事先排除環境光造成的亮度偏差,而達成不同原色發光二極體之亮度補償。In order to solve various shortcomings derived from the above-mentioned general color sequential display after a long period of use, the present invention discloses a color sequential display for reducing the aging phenomenon caused by the above light emitting diode and a related backlight module adjusting brightness brightness adjusting method. . The color sequence display and the related backlight module illumination brightness adjustment method disclosed by the present invention not only use one of the consideration conditions of the color sequence display as the adjustment condition of the brightness of the different primary color light-emitting diodes, but also the color sequence The backlight module configured by the display is affected by its ambient brightness (ie, ambient light) as one of the consideration conditions, so that the backlight module can eliminate the brightness deviation caused by the ambient light before determining the brightness of the light, thereby achieving different primary colors. Luminance compensation of the light-emitting diode.
在實施本發明所揭露之顯示器與方法時,首先需要先行介紹色序式顯示器在其背光模組的發光方式。請參閱第1圖,其為色序式顯示器之背光模組在根據不同原色進行顯示時之時間與亮度關係之時序示意圖。如第1圖所示,背光模組在以色序法進行顯示時,會在一短時間內以一預定色序來輪流顯示一影像,例如第1圖所示在16.76毫秒之內依序對應於紅色、綠色、藍色之三原色進行顯示的狀況,其中顯示上述三原色的時間長度係以脈衝寬度調變(Pulse Width Modulation,PWM)訊號的方式來進行調整,亦即以第1圖中所示以TR、TG、TB所示之三個時區的長度來進行調整。本發明所揭露之色序式顯示器與方法需要根據第1圖所示之時序示意圖進行解說,然而,在本發明所揭露之各種實施例中,所使用之預設色序並未被限定於第1圖中所示紅色、綠色、藍色之色序。In implementing the display and method disclosed in the present invention, it is first necessary to first introduce the illumination mode of the color sequential display in its backlight module. Please refer to FIG. 1 , which is a timing diagram showing the relationship between time and brightness of a backlight module of a color sequential display when displaying according to different primary colors. As shown in FIG. 1 , when the backlight module is displayed in the color sequential method, an image is displayed in turn in a predetermined color sequence in a short time, for example, correspondingly within 16.76 milliseconds as shown in FIG. 1 . The display of the three primary colors of red, green, and blue, wherein the length of time of displaying the three primary colors is adjusted by means of a Pulse Width Modulation (PWM) signal, that is, as shown in FIG. The adjustment is made with the lengths of the three time zones indicated by TR, TG, and TB. The color sequential display and method disclosed in the present invention need to be illustrated according to the timing diagram shown in FIG. 1. However, in various embodiments disclosed in the present invention, the preset color sequence used is not limited to the first embodiment. 1 The red, green, and blue color sequence is shown.
請參閱第2圖,其為根據本發明之一第一實施例所揭露之一色序式顯示器100的示意圖。如第1圖所示,色序式顯示器100係包含一時序控制器110、一背光模組120、一閘極線驅動單元130、一資料線驅動單元140、及一顯示面板150。背光模組120係包含一光感應器122、一溫度感應器124、及一背光模組驅動單元126。時序控制器110係包含一感應控制器160及一色序顯示驅動控制器170,其中感應控制器160係包含一色序感應單元180與一發光二極體控制單元190。光感應器122係用來偵測背光模組120對應於第1圖所示之各種原色所使用之不同發光亮度,來產生一光感應訊號並傳輸給感應控制器160。溫度感應器124用來偵測背光模組120之一溫度,以產生一溫度感應訊號並傳輸給感應控制器160;請注意,在本發明之一實施例中,溫度感應器124在進行對背光模組120的溫度偵測時,會持續偵測一段時間(例如數秒間),得到較為穩定之溫度計數之後才會將所得到之溫度值提供給其他元件使用,除此以外,當在偵測時間內背光模組120之溫度並未到達一穩定值時,會重新進行偵測直到得到穩定之溫度計數為止。背光模組驅動單元126用來根據發光二極體控制單元190所調整之一發光亮度,控制背光模組120所使用之對應於第1圖所示各種原色所使用之不同發光亮度。感應控制器160儲存有一對照表185,記錄有背光模組120對應於不同溫度及目標亮度值之下所應使用的理想亮度值(亦即標準亮度),其中對照表185在本發明之一實施例中的表示方式將在第3圖中進行說明。色序感應單元180用來接收背光模組120所接收到之該光感應訊號與該溫度感應訊號,並將該光感應訊號與該溫度感應訊號轉傳給發光二極體控制單元190。發光二極體控制單元190係以該光感應訊號所指示對應於第1圖所示之各種原色所使用之不同發光亮度、及該溫度感應訊號所指示背光模組120之溫度,來查詢對照表185,以找出並調整不同原色在不同溫度及目標亮度值下所對應之理想發光亮度。色序顯示驅動控制器170用來根據所接收之一影像資料產生一同步訊號,且該同步訊號係對應於第1圖中背光模組120顯示上述原色時之該預設色序,以使得背光模組120所產生之光線得以與顯示面板150上所顯示之影像資料同步。資料線驅動單元140係用來根據色序顯示驅動控制器170所接收之該影像資料與該預設色序驅動顯示面板150,以在顯示面板150上進行對應於該預設色序中之各種原色及該影像資料之顯示,且顯示面板150在顯示該影像資料時所需要之亮度係由發光二極體控制單元190與背光模組126所調整並控制。閘極線驅動單元130用來控制顯示面板150上之閘極線以運作顯示面板150。Please refer to FIG. 2, which is a schematic diagram of a color sequential display 100 according to a first embodiment of the present invention. As shown in FIG. 1 , the color sequential display 100 includes a timing controller 110 , a backlight module 120 , a gate line driving unit 130 , a data line driving unit 140 , and a display panel 150 . The backlight module 120 includes a light sensor 122, a temperature sensor 124, and a backlight module driving unit 126. The timing controller 110 includes an inductive controller 160 and a color sequential display driving controller 170. The inductive controller 160 includes a color sequential sensing unit 180 and a light emitting diode control unit 190. The light sensor 122 is configured to detect the different light-emitting brightness of the backlight module 120 corresponding to the various primary colors shown in FIG. 1 to generate a light-sensing signal and transmit it to the inductive controller 160. The temperature sensor 124 is configured to detect a temperature of the backlight module 120 to generate a temperature sensing signal and transmit it to the sensing controller 160. Please note that in one embodiment of the invention, the temperature sensor 124 is performing backlighting. When the temperature of the module 120 is detected, it will continue to detect for a period of time (for example, several seconds), and the obtained temperature value will be provided to other components after obtaining a relatively stable temperature count, in addition, when detecting When the temperature of the backlight module 120 does not reach a stable value, the detection will be performed again until a stable temperature count is obtained. The backlight module driving unit 126 is configured to control, according to one of the illumination brightnesses adjusted by the LED control unit 190, the different illumination brightness used by the backlight module 120 corresponding to the various primary colors shown in FIG. 1 . The inductive controller 160 stores a look-up table 185 that records the ideal brightness value (ie, standard brightness) that the backlight module 120 should use under different temperatures and target brightness values, wherein the comparison table 185 is implemented in one of the present inventions. The representation in the example will be explained in Fig. 3. The color sequence sensing unit 180 is configured to receive the light sensing signal and the temperature sensing signal received by the backlight module 120, and transmit the light sensing signal and the temperature sensing signal to the LED control unit 190. The LED control unit 190 queries the comparison table according to the different illumination brightnesses indicated by the photo-sensing signals corresponding to the various primary colors shown in FIG. 1 and the temperature of the backlight module 120 indicated by the temperature sensing signals. 185, to find and adjust the ideal illuminance of different primary colors at different temperatures and target brightness values. The color sequence display driving controller 170 is configured to generate a synchronization signal according to the received image data, and the synchronization signal corresponds to the preset color sequence when the backlight module 120 displays the primary color in FIG. 1 to make the backlight The light generated by the module 120 is synchronized with the image data displayed on the display panel 150. The data line driving unit 140 is configured to drive the display panel 150 according to the image data received by the color sequence display driving controller 170 and the preset color sequence to perform various types on the display panel 150 corresponding to the preset color sequence. The primary color and the display of the image data, and the brightness required by the display panel 150 to display the image data are adjusted and controlled by the LED control unit 190 and the backlight module 126. The gate line driving unit 130 is used to control the gate lines on the display panel 150 to operate the display panel 150.
請參閱第3圖,其為第2圖所示對照表185之一實施例的示意圖。如第3圖所示,對照表185係以溫度(例如第3圖所示之21-30、31-40、41-50等範圍)與目標亮度值(例如第3圖所示之150、200)作為索引,來儲存背光模組120所使用對應於各種溫度及目標亮度值組合的各原色標準亮度(即第3圖所示之 等資料)。舉例來說,當背光模組120溫度係為27度,且目前顯示器100所使用之目標亮度值係為150時,發光二極體控制單元190便會參照溫度值21-30與目標亮度值150所對應之一組亮度來作為各別對應於顯示紅色、綠色、藍色三種原色時所使用之理想發光亮度。Please refer to FIG. 3, which is a schematic diagram of an embodiment of the comparison table 185 shown in FIG. 2. As shown in FIG. 3, the comparison table 185 is based on temperature (for example, ranges of 21-30, 31-40, 41-50, etc. shown in FIG. 3) and target brightness values (for example, 150 and 200 shown in FIG. 3). As an index, the standard brightness of each primary color corresponding to the combination of various temperature and target brightness values used by the backlight module 120 is stored (ie, as shown in FIG. 3) And other information). For example, when the temperature of the backlight module 120 is 27 degrees, and the target brightness value used by the display 100 is 150, the LED control unit 190 refers to the temperature value 21-30 and the target brightness value 150. One group of brightness It is an ideal illuminance that is used when each of the three primary colors of red, green, and blue is displayed.
第2圖所示色序式顯示器100的驅動方式係敘述如下。首先在色序式顯示器100被啟動後,便會進行特定的起始程序,例如調整控制第1圖中提及對應於該預定色序顯示各原色所需的脈衝調變寬度訊號或驅動電流等設定,並載入發光二極體控制單元190的初始值設定,其中在第2圖之實施例中,色序式顯示器100所使用之目標亮度值亦於此時載入發光二極體控制單元190。在一第一階段中,溫度感應器124係將背光模組120本身的溫度變化以該溫度感應訊號的形式回授至感應控制器160所包含之色序感應單元180,再由感應控制器160所包含之發光二極體控制單元190根據所載入之目標亮度值與該溫度感應訊號所對應之溫度為索引查詢對照表185,以得到對應於各原色之一組標準亮度,例如第3圖所示各自對應於紅色、綠色、藍色之標準亮度等。接著在一第二階段中,光感應器122係將對背光模組120偵測其發光亮度所得到之實際亮度值以該光感應訊號的形式回授至色序感應單元180,再由發光二極體控制單元190將該光感應訊號所代表之發光亮度與發光二極體控制單元190在該第一階段中所查詢到之該組標準亮度值作比對,並據以控制背光模組驅動單元126驅動背光模組120時之發光亮度。請注意,該光感應訊號係包含對應於不同原色之實際發光亮度,且光感應器122係利用第1圖中所示對應於不同顏色之時區TR、TG、TB來進行分時偵測(亦即在時區TR中偵測紅色之實際發光亮度、在時區TG中偵測綠色之實際發光亮度、在時區TB中偵測藍色之實際發光亮度)。假設上述光感應器122對應於不同原色進行分時偵測所得到之實際亮度係各自為對應於紅色、綠色及藍色之LR、LG、LB,並假設此時溫度係為21-30,則發光二極體控制單元190會將標準亮度與實際亮度LR做比較、將標準亮度與實際亮度LG做比較、並將標準亮度與實際亮度LB做比較,以檢驗各實際亮度是否發生低於對應之標準亮度的狀況。當任一實際亮度低於對應之標準亮度時,則代表發生發光二極體老化使得發光亮度衰減的現象,且此時需要進行對應之亮度調整。舉例來說,假設在實際亮度LR低於標準亮度、且其他二者實際亮度並未低於對應之標準亮度的情況下,發光二極體控制單元190會將實際亮度LR、LG、LB作同步之微調提升,直至實際亮度LR、LG、LB皆各自不低於對應之標準亮度為止,以達成白平衡;假設在實際亮度LR低於標準亮度、且同時實際亮度LB低於標準亮度的情況下,發光二極體控制單元190亦會將實際亮度LR、LG、LB作同步之微調提升,直至實際亮度LR、LG、LB皆各自不低於對應之標準亮度為止,以達成白平衡;簡而言之,在本發明中對實際亮度所作之調整與補償係為對各種原色之微調提升,並直至任一原色對應之實際亮度皆不低於其標準亮度為止,以達成背光模組120在發光上的白平衡。The driving method of the color sequential display 100 shown in Fig. 2 is as follows. First, after the color sequential display 100 is activated, a specific initial program is performed, for example, the adjustment of the pulse modulation width signal or the driving current required to display the respective primary colors corresponding to the predetermined color sequence in FIG. Setting and loading the initial value setting of the LED control unit 190, wherein in the embodiment of FIG. 2, the target brightness value used by the color sequential display 100 is also loaded into the LED control unit at this time. 190. In a first stage, the temperature sensor 124 returns the temperature change of the backlight module 120 itself to the color sequence sensing unit 180 included in the sensing controller 160 in the form of the temperature sensing signal, and then the sensing controller 160 The included LED control unit 190 queries the comparison table 185 according to the loaded target brightness value and the temperature corresponding to the temperature sensing signal to obtain a standard brightness corresponding to one of the primary colors, for example, FIG. The respective brightness corresponding to the standard brightness of red, green and blue Wait. Then, in a second stage, the light sensor 122 returns the actual brightness value obtained by detecting the brightness of the backlight module 120 to the color sequence sensing unit 180 in the form of the light sensing signal, and then the light emitting diode The polar body control unit 190 compares the light-emitting brightness represented by the light-sensing signal with the set of standard brightness values queried by the light-emitting diode control unit 190 in the first stage, and controls the backlight module driving accordingly. The brightness of the light when the unit 126 drives the backlight module 120. Please note that the photo-sensing signal includes the actual illuminating brightness corresponding to different primary colors, and the photo sensor 122 performs time-division detection by using the time zones TR, TG, TB corresponding to different colors as shown in FIG. 1 (also That is, the actual luminance of red is detected in the time zone TR, the actual luminance of the green is detected in the time zone TG, and the actual luminance of the blue is detected in the time zone TB. It is assumed that the actual brightness systems obtained by the light sensor 122 corresponding to different primary colors for time-series detection are respectively LR, LG, and LB corresponding to red, green, and blue, and assuming that the temperature is 21-30 at this time, Light-emitting diode control unit 190 will standard brightness Compare with the actual brightness LR, the standard brightness Compare with actual brightness LG and standard brightness Compare with the actual brightness LB to check whether each actual brightness occurs below the corresponding standard brightness. When any actual brightness is lower than the corresponding standard brightness, it represents a phenomenon in which the illuminating diode aging causes the illuminating brightness to be attenuated, and corresponding brightness adjustment is required at this time. For example, suppose the actual brightness LR is lower than the standard brightness In the case where the actual brightness of the other two is not lower than the corresponding standard brightness, the LED control unit 190 will fine-tune the actual brightness LR, LG, LB, until the actual brightness LR, LG, LB Each of them is not lower than the corresponding standard brightness to achieve white balance; assume that the actual brightness LR is lower than the standard brightness And at the same time the actual brightness LB is lower than the standard brightness In the case of the LED control unit 190, the actual brightness LR, LG, and LB are also adjusted to be finely adjusted until the actual brightness LR, LG, and LB are not lower than the corresponding standard brightness to achieve white balance. In short, in the present invention, the adjustment and compensation for the actual brightness is to fine-tune the various primary colors, and until the actual brightness corresponding to any of the primary colors is not lower than the standard brightness, to achieve the backlight module. 120 white balance on the light.
請參閱第4圖,其為根據本發明之一第二實施例所揭露之顯示器200的示意圖。如第4圖所示,顯示器200與顯示器100的主要區別在於在感應控制器160中增加了環境光亮度計算單元215,以排除環境光在發光二極體控制單元190控制背光模組驅動單元126所使用之實際亮度時可能造成的亮度偏移。請注意,在第4圖中,係將感應控制器160替換成了感應控制器260、並將時序控制器110替換成了時序控制器210以指明與第2圖中顯示器100的差別。在上述顯示器100的運作過程中係提及光感應器122利用了各種原色的分時偵測機制以得到對應於各種原色之實際亮度的方法;而在第4圖所示之顯示器200中,除了應用到第1圖之時區TR、TG、TB 來進行分時偵測機制以得到對應於各原色之實際亮度LR、LG、LB以外,亦在第1圖所示之時區△TR、△TG、△TB中進行對紅色、綠色、藍色之環境光亮度SLR、SLG、SLB的分時偵測機制。如第1圖所示,在時區△TR、△TG、△TB中,由於紅色、綠色、藍色之脈衝寬度調變訊號並未處於高準位,因此背光模組驅動單元126並未發出紅色、綠色、藍色之光線;換言之,在時區△TR、△TG、△TB中僅會偵測到背光模組120之環境光亮度,且由於亦採用分時偵測機制,因此可在環境光亮度變動較快也較大的情況下,更完善且動態的對應於不同原色找出環境光在亮度上造成的影響。光感應器122所偵測到的環境光亮度亦透過色序感應單元180回授至發光二極體控制單元190,使得發光二極體控制單元190可將實際亮度LR、LG、LB各自扣除環境光亮度SLR、SLG、SLB,並根據亮度(LR-SLR)、(LG-SLG)、(LB-SLB)來進行上述為了達到白平衡所做的實際發光亮度調整;換言之,發光二極體控制單元190係根據環境光亮度計算單元215所調整之一已調整光感應訊號來進行發光亮度調整,使得最後背光模組驅動單元126達成的白平衡中已排除環境光亮度造成的影響。Please refer to FIG. 4, which is a schematic diagram of a display 200 according to a second embodiment of the present invention. As shown in FIG. 4, the main difference between the display 200 and the display 100 is that an ambient light brightness calculation unit 215 is added to the induction controller 160 to exclude ambient light from the light-emitting diode control unit 190 to control the backlight module driving unit 126. The brightness shift that can be caused by the actual brightness used. Note that in FIG. 4, the inductive controller 160 is replaced with the inductive controller 260, and the timing controller 110 is replaced with the timing controller 210 to indicate the difference from the display 100 in FIG. During the operation of the display 100 described above, it is mentioned that the light sensor 122 utilizes a time-sharing detection mechanism of various primary colors to obtain a method corresponding to the actual brightness of the various primary colors; and in the display 200 shown in FIG. 4, Apply to the time zone TR, TG, TB of Figure 1. To perform the time-sharing detection mechanism to obtain the actual luminances LR, LG, and LB corresponding to the respective primary colors, and also perform the red, green, and blue colors in the time zones ΔTR, ΔTG, and ΔTB shown in FIG. Time-sharing detection mechanism of ambient light brightness SLR, SLG, SLB. As shown in FIG. 1, in the time zones ΔTR, ΔTG, and ΔTB, since the pulse width modulation signals of red, green, and blue are not at a high level, the backlight module driving unit 126 does not emit red. , green, blue light; in other words, only the ambient light brightness of the backlight module 120 is detected in the time zones ΔTR, ΔTG, ΔTB, and because the time-sharing detection mechanism is also adopted, it can be used in ambient light. In the case where the brightness changes faster and is larger, the effect of the ambient light on the brightness is more perfect and dynamic corresponding to different primary colors. The ambient light brightness detected by the light sensor 122 is also fed back to the light emitting diode control unit 190 through the color sequence sensing unit 180, so that the light emitting diode control unit 190 can subtract the actual brightness LR, LG, and LB from the environment. Light brightness SLR, SLG, SLB, and according to the brightness (LR-SLR), (LG-SLG), (LB-SLB), the above-mentioned actual light-emitting brightness adjustment for achieving white balance; in other words, light-emitting diode control The unit 190 adjusts the light-emitting brightness according to one of the adjusted light-sensing signals adjusted by the ambient light brightness calculating unit 215, so that the influence of the ambient light brightness is eliminated in the white balance achieved by the last backlight module driving unit 126.
請參閱第5圖,其為根據本發明之一第三實施例所揭露之顯示器300的示意圖。如第5圖所示,顯示器300與第4圖所示顯示器200的主要區別在於顯示器300較顯示器200另外增加了一個直接偵測外部環境光之環境光感應器128,且感應控制器260另外增加了一個灰階值統計單元325而形成一感應控制器360。在第4圖之 顯示器200中,應用分時偵測機制於光感應器122所偵測到的環境光亮度係為背光模組120在其光源發光時所純粹受到環境光的影響部份;而在第5圖中所使用之環境光感應器128係用來直接對顯示器300外部之環境光進行量測,且環境光感應器128進行偵測的時機亦為第1圖中所示之時區△TR、△TG、△TB。然而,第4圖中光感應器122直接對背光模組120之光源偵測到的環境光亮度已考量到當下顯示器200顯示時所使用之灰階值,而環境光感應器128所直接偵測到的環境光並未根據顯示器300當下所使用之灰階值來進行考量,因此環境光亮度計算單元215無法直接根據環境光感應器128所偵測到之外部環境光亮度來在光感應器122所偵測到之實際發光亮度中排除環境光的因素。為了使環境光感應器128所偵測到之外部環境光亮度可被環境光亮度計算單元215用來排除實際發光亮度中環境光的因素,因此灰階值統計單元325係用來由色序顯示驅動控制器170中接收對應於影像資料之灰階資料,使得環境光亮度計算單元215可根據灰階值統計單元325所接收之灰階資料計算顯示面板150上當下的穿透率,並根據所計算出之穿透率較精確的得到環境光感應器128接收到的環境光亮度對於光感應器122偵測到之實際亮度所造成之影響。請注意,在第5圖中,係將第4圖所示感應控制器260替換成了感應控制器360、並將時序控制器210替換成了時序控制器310以指明與第4圖中顯示器200的差別。在本發明之一較佳實施例中,計算環境光感應器128所接收到環境光亮度對於光感應器122所偵測到之實際亮度的影響可量化為(環境光亮度)*(面板穿透率)*(灰階值統計單元325所偵測到之灰階值*顯 示面板150之畫素數目)/(顯示面板150之解析度)。Please refer to FIG. 5, which is a schematic diagram of a display 300 according to a third embodiment of the present invention. As shown in FIG. 5, the main difference between the display 300 and the display 200 shown in FIG. 4 is that the display 300 additionally adds an ambient light sensor 128 directly detecting the external ambient light to the display 200, and the sensing controller 260 is additionally added. A gray scale value statistics unit 325 is formed to form an inductive controller 360. In Figure 4 In the display 200, the ambient light brightness detected by the light sensor 122 by using the time-sharing detection mechanism is the portion of the backlight module 120 that is directly affected by the ambient light when the light source is illuminated; and in FIG. 5 The ambient light sensor 128 used is for directly measuring the ambient light outside the display 300, and the timing of the ambient light sensor 128 detecting is also the time zone ΔTR, ΔTG, shown in FIG. △ TB. However, the ambient light brightness detected by the light sensor 122 directly on the light source of the backlight module 120 in FIG. 4 has been taken into consideration to the gray scale value used when the display 200 is displayed, and the ambient light sensor 128 directly detects The ambient light is not taken into account according to the gray scale value used by the display 300. Therefore, the ambient light brightness calculation unit 215 cannot directly directly measure the ambient light brightness detected by the ambient light sensor 128 at the light sensor 122. The ambient light is excluded from the detected actual luminance. In order for the ambient light luminance detected by the ambient light sensor 128 to be used by the ambient light luminance calculation unit 215 to exclude ambient light in the actual luminance, the grayscale value statistics unit 325 is used to display by color sequence. The grayscale data corresponding to the image data is received by the driving controller 170, so that the ambient light luminance calculating unit 215 can calculate the current transmittance on the display panel 150 according to the grayscale data received by the grayscale value counting unit 325, and according to the The calculated transmittance is more accurate to obtain the effect of the ambient light brightness received by the ambient light sensor 128 on the actual brightness detected by the light sensor 122. Please note that in FIG. 5, the inductive controller 260 shown in FIG. 4 is replaced with the inductive controller 360, and the timing controller 210 is replaced with the timing controller 310 to indicate the display 200 in FIG. The difference. In a preferred embodiment of the present invention, the effect of the ambient light intensity received by the ambient light sensor 128 on the actual brightness detected by the light sensor 122 can be quantified as (ambient light)* (panel penetration) Rate)* (the grayscale value detected by the grayscale value statistical unit 325* The number of pixels of the panel 150) / (resolution of the display panel 150).
請參閱第6圖,其為根據本發明之一第四實施例所揭露之顯示器400的示意圖。如第6圖所示,顯示器400與第5圖所示顯示器300的主要區別在於背光模組120中的光感應器122被替換成了一光感應器陣列622,溫度感應器124被替換成了一溫度感應器陣列624,使得第6圖中係以背光模組620替換背光模組120。第6圖中所示之顯示器400主要係應用於較大尺寸之顯示面板及顯示器,例如32吋以上之顯示面板及顯示器,因此使用光感應器陣列622與溫度感應器陣列624可較佳的符合該種較大尺寸之顯示面板及顯示器的需求。溫度感應器陣列624係包含複數個溫度感應器(未圖示,如溫度感應器124),且光感應器陣列622亦包含複數個光感應器(未圖示),且該複數個光感應器係包含如之前各圖所示之光感應器122或第5圖所示之環境光感應器128,以各自輔助環境光亮度計算單元215排除顯示器400內部或外部環境光所造成的影響。Please refer to FIG. 6, which is a schematic diagram of a display 400 according to a fourth embodiment of the present invention. As shown in FIG. 6, the main difference between the display 400 and the display 300 shown in FIG. 5 is that the light sensor 122 in the backlight module 120 is replaced with a light sensor array 622, and the temperature sensor 124 is replaced. A temperature sensor array 624 is used to replace the backlight module 120 with the backlight module 620 in FIG. The display 400 shown in FIG. 6 is mainly applied to a display panel and a display of a larger size, for example, a display panel and a display of 32 inches or more, so that the use of the light sensor array 622 and the temperature sensor array 624 can preferably be matched. The need for such larger display panels and displays. The temperature sensor array 624 includes a plurality of temperature sensors (not shown, such as the temperature sensor 124), and the light sensor array 622 also includes a plurality of light sensors (not shown), and the plurality of light sensors The light sensor 122 shown in the previous figures or the ambient light sensor 128 shown in FIG. 5 is included to exclude the influence of ambient light inside or outside the display 400 by the respective auxiliary ambient light calculation unit 215.
請參閱第7圖,其為根據本發明之一第五實施例所揭露之顯示器500的示意圖。如第7圖所示,顯示器500與之前本發明所揭露之各顯示器的不同處在於顯示器500係以一微處理器510直接執行之前所述色序感應單元180、環境光亮度計算單元215、發光二極體控制單元190、或灰階值統計單元325的功能,以由背光模組120接收所需之溫度感應訊號、光感應訊號、或環境光亮度訊號,並據以調整背光模組驅動單元126所使用之發光亮度,以及由色序顯示驅動控制器170接收同步訊號以使背光模組120之發光與顯示面板150之影像資料顯示同步。Please refer to FIG. 7, which is a schematic diagram of a display 500 according to a fifth embodiment of the present invention. As shown in FIG. 7, the difference between the display 500 and the displays disclosed in the present invention is that the display 500 is directly executed by a microprocessor 510 before the color sequential sensing unit 180, the ambient light luminance calculating unit 215, and the light emitting. The function of the diode control unit 190 or the gray scale value counting unit 325 is to receive the required temperature sensing signal, optical sensing signal, or ambient light brightness signal by the backlight module 120, and adjust the backlight module driving unit accordingly. The illumination brightness used by the 126 and the color sequence display drive controller 170 receive the synchronization signal to synchronize the illumination of the backlight module 120 with the image data display of the display panel 150.
請參閱第8圖,其為根據第2圖所示之顯示器100所揭露背光模組調整發光亮度之方法的示意圖。如第8圖所示,該方法包含步驟如下:步驟802:啟動一色序式顯示器並執行一起始程序;步驟804:載入一發光二極體控制單元之一初始值設定;步驟806:偵測一背光模組之一溫度;步驟808:根據該背光模組所偵測之該溫度及一顯示器所使用之一目標亮度值來查詢一對照表,以得到對應於該溫度及該目標亮度值之一標準亮度;步驟810:根據一分時機制偵測該背光模組對應於至少一種原色所使用之一實際發光亮度;步驟812:比較該標準亮度與該實際發光亮度,以確認該實際發光亮度是否低於該標準亮度;當該實際發光亮度低於該標準亮度時,執行步驟814,否則執行步驟806;及步驟814:將該實際發光亮度進行微調提升,直至該實際發光亮度不低於該標準亮度為止,並執行步驟806。Please refer to FIG. 8 , which is a schematic diagram of a method for adjusting the brightness of a backlight of the backlight module according to the display 100 shown in FIG. 2 . As shown in FIG. 8, the method includes the following steps: Step 802: Start a color sequential display and execute an initial program; Step 804: Load an initial value setting of a light emitting diode control unit; Step 806: Detect a temperature of a backlight module; step 808: query a comparison table according to the temperature detected by the backlight module and a target brightness value used by a display to obtain a temperature corresponding to the temperature and the target brightness value. a standard brightness; step 810: detecting, according to a time-sharing mechanism, an actual light-emitting brightness of the backlight module corresponding to at least one primary color; step 812: comparing the standard brightness with the actual light-emitting brightness to confirm the actual light-emitting brightness Whether the brightness is lower than the standard brightness; when the actual brightness is lower than the standard brightness, step 814 is performed, otherwise step 806 is performed; and step 814: the actual brightness is fine-tuned until the actual brightness is not lower than the The standard brightness is up to and step 806 is performed.
請注意,當在步驟812中光感應器122所偵測到之實際發光亮度不低於發光二極體控制單元190由對照表185查表所得到之該標準亮度時,即代表目前背光模組120的狀態正常,故重新起始各種偵測程序以持續確認背光模組120是否發生老化現象。而當在步驟812中光感應器122所偵測到之實際發光亮度低於發光二極體控制單元190由對照表185查表所得到之該標準亮度時,則代表背光模組120中的發光二極體發生了老化現象,此時依至少一種原色中出現老化現象的實際亮度微調提升,直至所有原色之實際亮度皆高於對應之標準亮度為止,以達成白平衡。Please note that when the actual brightness of the light detected by the light sensor 122 in step 812 is not lower than the standard brightness obtained by the light-emitting diode control unit 190 by the look-up table 185, it represents the current backlight module. The state of 120 is normal, so various detection procedures are restarted to continuously confirm whether the backlight module 120 is aging. When the actual brightness of the light detected by the light sensor 122 in step 812 is lower than the standard brightness obtained by the light-emitting diode control unit 190 by the look-up table 185, the light in the backlight module 120 is represented. The aging phenomenon occurs in the diode, and the actual brightness of the aging phenomenon in at least one of the primary colors is finely adjusted until the actual brightness of all the primary colors is higher than the corresponding standard brightness to achieve white balance.
請參閱第9圖,其為根據第4圖所示之顯示器200所揭露背光模組調整發光亮度之方法的示意圖。如第9圖所示,除了與第8圖中重複之步驟以外,該方法另包含步驟如下:步驟811:根據一分時機制偵測該背光模組對應於至少一種原色之一環境光亮度,並由步驟810中所偵測到之實際發光亮度中排除該環境光亮度所造成之影響。Please refer to FIG. 9 , which is a schematic diagram of a method for adjusting brightness of a backlight module according to the display 200 shown in FIG. 4 . As shown in FIG. 9, in addition to the steps repeated in FIG. 8, the method further includes the following steps: Step 811: detecting, according to a time sharing mechanism, the ambient brightness of the backlight module corresponding to one of the at least one primary color, And the effect of the ambient light brightness is excluded from the actual light-emitting brightness detected in step 810.
第9圖所示之方法與第8圖所示方法的差異處主要係為引進了環境光偵測機制,並在光感應器所偵測到背光模組所發出之實際發光亮度中排除環境光造成之影響。The difference between the method shown in Figure 9 and the method shown in Figure 8 is mainly the introduction of an ambient light detection mechanism, and the ambient light is excluded from the actual light-emitting brightness detected by the light sensor. The impact.
請參閱第10圖,其為根據第5圖所示之顯示器300所揭露背光模組調整發光亮度之方法的示意圖。如第10圖所示,除了與第8圖或第9圖中重複之步驟以外,該方法另包含步驟如下:步驟911:根據一分時機制偵測該背光模組對應於至少一種原色之一環境光亮度、根據該顯示器之影像灰階值與該環境光亮度計算該顯示面板之一穿透率、並根據該穿透率由步驟810中所偵測到之實際發光亮度中排除該環境光亮度所造成之影響。Please refer to FIG. 10 , which is a schematic diagram of a method for adjusting the brightness of a backlight module according to the display 300 disclosed in FIG. 5 . As shown in FIG. 10, in addition to the steps repeated in FIG. 8 or FIG. 9, the method further includes the following steps: Step 911: detecting, according to a time sharing mechanism, the backlight module corresponds to one of at least one primary color Ambient light brightness, calculating a transmittance of the display panel according to the image grayscale value of the display and the ambient light brightness, and excluding the ambient light according to the actual light emission brightness detected in step 810 according to the transmittance The effect of brightness.
第6圖與第7圖所示之顯示器400、500係應用第8、9、10圖中所揭露的方法或其步驟之組合,故不再多加贅述。然請注意,將第8、9、10圖中所述步驟加以合理之排列組合或是附加上述說明中所提及之其他附加條件所產生之實施例,仍應視為本發明之範疇。The displays 400 and 500 shown in Figures 6 and 7 are applied in combination with the methods disclosed in Figures 8, 9, and 10, or a combination thereof, and therefore will not be described again. It is to be noted, however, that the embodiments described in the eighth, ninth, and tenth drawings, which are in the form of a reasonable arrangement, or in addition to the other additional conditions mentioned in the above description, are still considered to be within the scope of the present invention.
本發明係揭露一種色序式顯示器與相關之背光模組發光亮度調整方法,以解決一般色序式顯示器在面臨背光模組之各原色發光二極體老化時亮度不足的問題而達成白平衡。本發明所揭露之色序式顯示器亦在各原色發光二極體之亮度調整上考量了環境光造成的亮度偏移並克服了該問題,使得本發明之色序式顯示器在調整亮度時不會受到環境光的干擾。The invention discloses a color sequence display and a related backlight module light-emitting brightness adjusting method, so as to solve the problem that the general color-sequence display has insufficient brightness when facing the aging of the primary color light-emitting diodes of the backlight module to achieve white balance. The color sequential display disclosed in the present invention also considers the brightness shift caused by ambient light in the brightness adjustment of each primary color light emitting diode and overcomes the problem, so that the color sequential display of the present invention does not adjust the brightness. Interfered with ambient light.
以上所述僅為本發明之較佳實施例,凡依本發明申請專利範圍所做之均等變化與修飾,皆應屬本發明之涵蓋範圍。The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.
100、200、300、400、500...顯示器100, 200, 300, 400, 500. . . monitor
110、210、310...時序控制器110, 210, 310. . . Timing controller
120、620...背光模組120, 620. . . Backlight module
122...光感應器122. . . Light sensor
124...溫度感應器124. . . Temperature sensor
126...背光模組驅動單元126. . . Backlight module drive unit
128...環境光感應器128. . . Ambient light sensor
130...閘極線驅動單元130. . . Gate line drive unit
140...資料線驅動單元140. . . Data line drive unit
150...顯示面板150. . . Display panel
160、260、360...感應控制器160, 260, 360. . . Induction controller
170...色序顯示驅動控制器170. . . Color sequence display drive controller
180...色序感應單元180. . . Color sequence sensing unit
185...對照表185. . . Chart
190...發光二極體驅動單元190. . . LED driver unit
215‧‧‧環境光亮度計算單元215‧‧‧ Ambient light intensity calculation unit
325‧‧‧灰階值統計單元325‧‧‧ Grayscale value statistics unit
510‧‧‧微處理器510‧‧‧Microprocessor
622‧‧‧光感應器陣列622‧‧‧Light sensor array
624‧‧‧溫度感應器陣列624‧‧‧Temperature sensor array
第1圖為色序式顯示器之背光模組在根據不同原色進行顯示時之時間與亮度關係之時序示意圖。Figure 1 is a timing diagram showing the relationship between time and brightness of a backlight module of a color sequential display when displayed according to different primary colors.
第2、4、5、6、7圖為根據本發明之各實施例所揭露之色序式顯示器的示意圖。2, 4, 5, 6, and 7 are schematic views of a color sequential display according to various embodiments of the present invention.
第3圖為第2圖所示對照表之一實施例的示意圖。Figure 3 is a schematic illustration of one embodiment of the look-up table shown in Figure 2.
第8、9、10圖為根據本發明之各實施例所揭露之之背光模組發光亮度調整方法的示意圖。8 , 9 and 10 are schematic diagrams showing a method for adjusting the brightness of a backlight module according to various embodiments of the present invention.
300...顯示器300. . . monitor
310...時序控制器310. . . Timing controller
120...背光模組120. . . Backlight module
122...光感應器122. . . Light sensor
124...溫度感應器124. . . Temperature sensor
126...背光模組驅動單元126. . . Backlight module drive unit
128...環境光感應器128. . . Ambient light sensor
130...閘極線驅動單元130. . . Gate line drive unit
140...資料線驅動單元140. . . Data line drive unit
150...顯示面板150. . . Display panel
360...感應控制器360. . . Induction controller
170...色序顯示驅動控制器170. . . Color sequence display drive controller
180...色序感應單元180. . . Color sequence sensing unit
185...對照表185. . . Chart
190...發光二極體驅動單元190. . . LED driver unit
215...環境光亮度計算單元215. . . Ambient light intensity calculation unit
325...灰階值統計單元325. . . Gray scale value statistics unit
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