591957 玖、發明說明 (發明說明應敘明：發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明） (一） 發明所屬之技術領域 本發明係有關一種顯示裝置，且更特別的是有關一種用於 調整使用者選擇區域之視頻參數的顯示器系統。 (二） 先前技術 標準的電腦相關顯示器系統使用陰極射線管（CRT )監視器 以顯示包含視頻和文字之類各種型式的資料。爲了在CRT 監視器上顯示諸如動畫、圖表及照片之類的視頻資料，經常 會因爲使用了非常多的顏色以提供逼真的陰影效應以及顏 色變化而需要具有合理之高位準的發光度。增加該CRT監視 器上視頻資料的發光度範圍，可使視頻影像在反差及亮度上 變得更豐富而改良了影像的視覺品質。 不過較之電視系統，諸如CRT監視器或LCD顯示器之類現 有的電腦相關顯示器系統，通常無法在顯示上述視頻資料時 提供足夠的發光度。例如，在將用於普遍電視系統的視頻信 號顯示於普遍的CRT監視器上時，通常所顯示影像的亮度會 很低，且該影像會顯得太陰暗，這是因爲現有電腦相關顯示 器系統的亮度參數通常會比電視系統的亮度參數小很多的 緣故。 爲了排除這種問題，亮度必要的是具有一種能夠增加CRT 監視器上使用者選擇區域之發光度位準，而使所有其他區域 之發光度保持在相當低的位準上的顯示器系統。依這種方式 -7- 591957 ’可在未增加整個監視器屏幕的亮度下，大幅改良使用者選 擇區域的視覺影像品質，而爲上述問題提供必要的解決方式 〇 (三）發明內容 據此，本發明係指向一種用於調整使用者選擇區域之視頻 參數的顯示器系統，使之實質上能夠排除一個或更多個肇因 於相關習知設計上之限制和缺點而產生的問題。 本發明的目的在於提供一種用於調整使用者選擇區域之 視頻參數的顯示器系統，使之能夠補償發生在一視頻信號與 顯示器系統從一影像源裝置接收到的各水平同步信號之間 的延遲。 本發明的另一目的在於提供一種用於調整使用者選擇區 域之視頻參數的顯示器系統，使之能夠補償肇因於該顯示器 系統與影像源裝置之間不同的顯示設定値所產生的垂直偏 移。 可參照以下說明列舉本發明除此之外的其他目的、特性、 及優點且對熟悉習知設計的人而言會因爲下列檢驗而變得 很淸楚或者可從施行本發明而得知。本發明的目的及其他優 點將會因爲以下的書面說明及所附申請專利範圍中指出的 特殊結構而施行並得到。 爲了達成其他目的，一種根據本發明的用於調整使用者選 擇區域之視頻參數的顯示器統，包含：一位準偵測器，係用 以偵測出所顯示的完整影像中複數個代表性影像線之一內 所包含的線形圖案；一圖案接收器，係耦合於該位準偵測器 - 8- 591957 上以便接收所偵測到包含其端點會依垂直方式與該區域之 垂直邊緣對齊之位置標示器的圖案；以及一畫素計數器，係 耦合於該圖案接收器上，以便量測各標示器端點相對於一參 考點亦即完整影像中最頂部影像線之第一起始畫素的第一 組水平位置。該顯示器系統進一步包含：一圖案分析器，係 用來以該第一組水平位置爲基礎，計算出一視頻控制區域上 各垂直邊緣相對於該參考點的第二組水平位置；以及一視頻 前置放大器，係用以根據所接收到之圖案內所包含的一組預 定的視頻參數値對該視頻控制區域上的至少一個視頻參數 進行調整。 除此之外，根據本發明的顯示器系統進一步包含一線計數 器，係耦合於該圖案接收器上，以便量測該參考點與圖案內 含線之間的垂直偏移距離，其中該圖案進一步包含使用者選 擇擇區域上各水平邊緣相對於該圖案內含線的第一組垂直 位置。然後，該圖案分析器會藉由分別將該偏移距離疊加到 該第一組垂直位置上，進一步計算出控制區域上各水平邊緣 相對於該參考點的第二組垂直位置。 依照本發明的另一槪念，一種用於調整使用者選擇區域之 視頻參數的顯示器系統，係包含：一位準偵測器，係用以偵 測出所顯示的完整影像中複數個代表性影像線之一內所包 含的線形圖案；一圖案接收器，係耦合於該位準偵測器上， 以便接收所偵測到包含其端點會依垂直方式與該區域之垂 直邊緣對齊之位置標示器的圖案；以及一畫素計數器，係耦 合於該圖案接收器上，以便量測各標示器端點相對於一參考 - 9- 591957 點亦即完整影像中最頂部影像線之第一起始畫素的第一組 水平位置。該顯不器系統進一步包含：一監視器微處理器， 係耦合於該圖案接收器上用來以該第一組水平位置爲基礎 ，計算出一視頻控制區域上各垂直邊緣相對於該參考點的第 二組水平位置，其中該微處理器係用以將畫素頻率資訊輸入 到該畫素計數器上；以及一視頻前置放大器，係用以對該視 頻控制區域上的至少一個視頻參數進行調整。 除此之外，該顯示器系統進一步包含一線計數器，係耦合 於該圖案接收器上以便量測該參考點與圖案內含線之間的 垂直偏移距離，其中該圖案進一步包含使用者選擇區域上各 水平邊緣相對於該圖案內含線的第一組垂直位置。然後，該 監視器微處理器會藉由分別將該偏移距離疊加到該第一組 垂直位置上，進一步計算出控制區域上各水平邊緣相對於該 參考點的第一組垂直位置。 吾人應該了解的是，前述一般說明以及本發明以下的詳細 說明，兩者都是典型而解釋用的，且有意以本發明所附申請 專利範圍對本發明提供進一步的解釋。 (四）實施方式 現在吾人將參照各附圖詳細說明本發明的實施例。可能的 話，將以相同的符號標示出各附圖中相同或相似的零件。 第1圖顯示的是一種根據本發明的影像顯示器系統。參照 第1圖，該影像顯示器系統係包含：一影像源裝置（例如電 腦裝置）10,係用以產生視頻信號（R/G/B(紅/綠/藍光）信號） 及水平和垂直同步信號（H-SYNC和V-SYNC信號）；以及一陰 -10 - 591957 極射線管（C R Τ )監視器2 Ο ’係用以接收來自該影像源裝置1 〇 的R / G / Β 號和S Y N C信號’並顯示一影像以回應各r / (3 / β 信號和SYNC信號。該影像源裝置1 〇包含··一應用單元（例 如所安裝的程式或驅動器單元）1 2，係用以接收代表原始影 像（主動式影像）的資訊並將線形圖案疊加到該主動式影像 最頂部的影像線上；以及一視訊卡1 1，係用以接收代表已 疊加有圖案之主動式影像的視頻資訊並產生一視頻信號及 對應的H-SYNC和V-SYNC信號。該線形圖案係包含一使用者 選擇區域相對於該主動式影像上之參考點P〇’的位置。 另一方面，該CRT監視器20係包含：面板按鍵24 ;監視 器CPU(監視器中央處理單元，例如微處理器）22 ; —視頻控 制單元2 1 ; —主視頻前置放大器2 3 ;以及一陰極射線管 (CRT ) 2 5。該視頻控制單元2 1會在初始時接收來自該視訊卡 1 1的R/G/B信號和SYNC信號，且會在定出一視頻控制區域 相對於實際顯示於CRT 25之完整影像上之參考點P〇”的位置 時，對諸如亮度、反差、鮮明度及該使用者選擇區域的突顯 作用之類的視頻參數進行調整。該視頻控制單元2 1會接收 來自該監視器CPU 22的畫素頻率資訊，以便對該使用者選 擇區域上左側與右側邊緣之間相對於參考點P。”的距離（畫 素數目）作適當量測。最後’各面板按鍵24會接收來自使用 者的指令，以便控制該CRT監視器20的顯示設定，且該主 視頻前置放大器2 3會放大於該視頻控制單元2 1內接受處理 的R / G / B信號。 -11- 591957 第2和3圖係用以顯示如第1圖所示之CRT監視器20內 根據本發明第一和第二實施例之視頻控制單元2 1的示意圖 。參照第2圖，該視頻控制單元2 1包含：一位準偵測器20 1 ’係用以偵測出如第5圖所示之CRT監視器2 0上所顯示的 兀整影像中複數個代表性影像線之一1內所包含的線形圖案 ;以及一圖案接收器2 0 4 ’係耦合於該位準偵測器2 0 1上， 以便接收所偵測的線形圖案。所接收的線形圖案包含其端點 會依垂直方式與該區域之垂直邊緣對齊之位置標示器，且包 含用以標示該使用者選擇區域上各水平邊緣相對於該圖案 內含線的第一組垂直位置。該位準偵測器20 1進一步包含： 一畫素計數器2 0 2，係耦合於該圖案接收器2 0 4上，以便量 測各標示器端點相對於一參考點亦即完整影像中最頂部影 像線之第一起始畫素的第一組水平位置；以及一線計數器 20 3 ’係耦合於該圖案接收器2〇4上，以便量測該參考點與 圖案內含線之間的垂直偏移距離。然後，圖案分析器205 會以各標示器端點的水平位置爲基礎，計算出一視頻控制區 域上各垂直邊緣相對於該參考點的一組水平位置，且會藉由 分別將該偏移距離疊加到該圖案內所包含的垂直位置上，進 一步計算出該控制區域上各水平邊緣相對於該參考點的一 組垂直位置。最後，該位準偵測器2 0 1包含：一增益控制器 206 ’係用以根據該圖案內所包含的圖案內所包含的一組預 定視頻參數値設定出用於該控制區域的視頻控制增益値·，以 及一視頻前置放大器2 0 7，係用以據此放大該RGB信號。 除了省略該圖案分析器205之外，如第3圖所示之視頻控 591957 制單元2 1是與如第2圖所示之視頻控制單元2 1完全相同的 。取代的是，該監視器CPU22會依類似方式計算出該控制區 域相對於該參考點的位置，而該增益控制器206則會設定出 用於該控制區域的視頻控制增益値。依這種方式，可大幅地 簡化該位準偵測器20 1的結構。 第4圖係用以顯示一種表爲應用單元1 2在如第1圖所示 之視訊卡1 1上所提供影像資訊之主動式影像實例的示意圖 。該影像源裝置1 〇的應用單元1 2會允許使用者選擇必要的 區域（如第4圖所示的矩形盒子）並對所選擇區域的一個或 更多個進行調整。例如，可藉由以受到連接於該影像源裝置 1 0上之滑鼠（未標示）控制的滑鼠指示器點選一必要區域的 左上角，並將該指示器拉到該必要區域的右下角以選出該必 要區域。可替代地，使用者能夠僅藉由點選至少一個新近已 顯示於監視器屏幕上的視窗，或是藉由按下鍵盤上所提供的 一個或更多個按鍵鈕選出該必要區域。 當使用者選出該必要區域時，應用單元1 2會量測並儲存 所選擇區域的位置資訊。諸位置資訊包含代表著該使用者選 擇區域之上和下方邊緣相對於該主動式影像上之參考點（例 如第4圖中之P。’）的垂直位置V_START和V_END。該應用單 元1 2可能會進一步量測代表著該使用者選擇區域之左和右 側邊緣相對於P。’的水平位置H_START和H_END，但是這些 數値並非根據本發明用於調整使用者選擇區域之視頻參數 的必要參數。該應用單元1 2係依線的形式儲存各垂直位置 的數値而依畫素的形式儲存各水平位置。這是因爲該應用單 -13- 元1 2使用的座標系統分別係以線和畫素的形式表出該主動 式影像上任意一點的垂直和水平位置。 然後，該應用單元1 2會在獲致所需要的座標資訊之後將 一線形圖案疊加到該主動式影像的最頂部一條線上。該線形 圖案包含了含有該使用者選擇區域之座標資訊（V_START和 V-END )的圖案資料、一控制密碼、以及一圖案確認密碼（例 如行列總和）。該線形圖案可能進一步包含該使用者選擇區 域相對於P。’的水平位置。該控制密碼指的是包含用於亮度 、反差、鮮明度及突顯作用的視頻控制參數。該應用單元 1 2係藉由包含諸如行列總和之類的資料確認密碼以確保可 適當地傳輸圖案資料，該資料確認密碼會允許該視頻控制單 元2 1或監視器CPU 2 2確認所傳輸的圖案資料不會於傳輸期 間發生改變，並防止將視頻信號上偵測到的任何非圖案部分 當作圖案資料。通常，一行列總和指的是，代表所傳輸圖案 資料內可由該應用單元1 2和監視器CPU 2 2 (或視頻控制單 元2 1 )定出之所有文字上各代表數値之總和的數目。該監視 器CPU 2 2能夠藉由將圖案資料內所包含的行列總和與新定 出之行列總和作比較以確認該線形圖案內所包含的圖案資 料。 翻閱第1圖，在該影像源裝置1 0的視訊卡1 1接收到用以 定義出來自應用單元1 2疊加有圖案之主動式影像的影像資 訊之後，該視訊卡1 1會產生一 RGB信號及水平和垂直同步 信號（H-SYNC和V-SYNC)，以顯示一影像並控制該CRT監視 器20的作業。然後，該CRT監視器20的視頻控制單元21 - 1 4 - 591957 會接收RGB及各SYNC信號，並根據一組由控制密碼構成的 預定參數値至少對用於使用者選擇區域的亮度、反差、鮮明 度及突顯參數之一進行調整。之後，將經前置放大的RGB 信號送到主視頻前置放大器2 3上，以放大該RGB信號，並 以CRT 25顯示該RGB信號。 第5圖係用以顯示一種顯示於CRT 2 5上以回應從視訊卡 1 1接收到的RGB信號及各SYNC信號之完整影像實例的示意 圖。參照第5圖，吾人應該注意的是實際上顯示於CRT 25 上的完整影像並非恰好與如第4和5圖所示之主動式影像重 合，而是一個肇因於該CRT監視器20與應用單元12之間不 同的顯示器設定値或座標系統而大於該主動式影像的全影 像。例如，用以代表如第5圖所示之完整影像上某一點位置 的座標系統可能不同於用以代表如第4圖所示之主動式影 像上某一點位置的座標系統。換句話說，該完整影像上任意 一點的位置係相對於該完整影像上的參考點（例如P。”）而不 是該主動式影像上的參考點（例如P。’）量測得的。除此之外 ，經常會在該CRT監視器20從視訊卡1 1接收到RGB與各 SYNC信號之間發生延遲。這些延遲甚至會在該完整影像與 主動式影像之間產生更大的座標不一致性。 第6圖係用以顯示H-SYNC和V-SYNC信號以及用於該視頻 控制單元從視訊卡1 1接收到之線形圖案的信號的示意圖。 如同稍早的解釋，對應於該主動式影像上最頂部一條線的視 頻信號係包含一圖案信號。該圖案信號係包含PCLOCK、 PDATA和PWINDOW之類信號，其中每一個都可能分別包含於 -15- 591957 各RGB信號內。有關第5和6圖的更詳盡細節可進一步說明 如下。 現在將參照第1到3圖詳細說明根據本發明的影像顯示器 系統。開始時，視頻前置放大器2 0 7和位準偵測器2 0 1會開 始接收來自該影像源裝置1 0之視訊卡1 1的RGB信號及 H-SYNC和V-SYNC信號。翻閱第6圖，線計數器20 3會在時 間=T1時初始地偵測到第一 V-SYNC脈波和第一 H-SYNC脈波 。所偵測到的各同步脈波代表的是，如第5圖所示之完整影 像上最頂部一條視頻線的起始線（Pc)，，）。在T 1與T2之間， 該視頻控制單元2 1的線計數器2 0 3會藉由偵測進一步的 Η - SYNC脈波而持續計數該完整影像上的視頻線數目直到T2 爲止。 當時間=Τ2時，線計數器203會偵測到一對應於該完整影 像上包含該線形圖案之視頻線起始點的Η - SYNC脈波。之後 ，該視頻控制單元2 1的圖案接收器2 0 4會在時間：rT 3時偵 測到PCLOCK的第一上升邊緣。此時，該圖案接收器204會 定出代表由線計數器20 3在Τ1與Τ2間偵測到之視頻線數目 的V-OFFSET。換句話說，V_OFFSET代表的是該完整影像上 最頂部一條線與如第5圖所示之內含圖案的影像線間的垂 直距離。 除此之外，該圖案接收器204會自從該位準偵測器20 1 接收到的PDATA信號中粹取出圖案資料。該PDATA信號指的 是一種如第6圖所示根據其內所包含的圖案資料含有「〇」 或「1」的信號。如同稍早提及的，所粹取出的圖案資料係 -16- 591957 包含V_START和V_END、一控制密碼、以及一行列總和。其 中V_START和V_END代表的是該使用者選擇區域之上和下方 邊緣相對於該主動式影像上之參考點（例如第4圖中之P。，） 的垂直位置。該控制密碼指的是一種包含用以反白該使用者 選擇區域之亮度，以及諸如反差、鮮明度及突顯作用之類其 他型式之視頻參數的密碼。該行列總和指的是一種允許該圖 案接收器204或監視器CPU 22對所接收到的圖案資料進行 確認的圖案確認密碼。 該圖案接收器204從該位準偵測器20 1接收到的圖案信號 進一步包含一用以標示出該使用者選擇區域相對於第5圖 中P〇”點之水平位置的PWINDOW信號。翻閱第6圖，該圖案 接收器204會會在時間=T4時偵測到PWIND0W信號的上升邊 緣。接下來，該圖案接收器204會利用畫素計數器202計數 存在於Τ2與Τ4之間的畫素數目，以定出代表該使用者選擇 區域之左側邊緣相對於第 5圖中Ρ。”點之水平位置的 * PCV_H_START信號。該畫素計數器202會使用由監視器CPU 22所提供的畫素頻率資訊以計數每一個畫素。之後，該圖 案接收器204會在時間=T5時偵測到PWIND0W信號的下降邊 緣。同樣地，該圖案接收器2 0 4會利用畫素計數器2 0 2定出 代表該使用者選擇區域之右側邊緣相對於第5圖中Ρ。”點之 水平位置的RCV_H__END信號。再次，該畫素計數器202計數 存在於T2與T5之間的畫素數目。 在定出 V_〇FFSET、RCV__H_START 和 RCV —H —END 等所有信號 且完全接收到該圖案資料之後，該圖案接收器2 0 4會將所定 -17- 591957 出的位置値送到圖案分析器2 Ο 5或畫素計數器2 Ο 2上。然後 ，該圖案分析器2 0 5或畫素計數器2 0 2藉由將該圖案資料內 所包含的行列總和與新定出的行列總和作比較以確認該圖 案資料是否正確。假如發現該圖案資料是不正確的，該圖案 分析器205或畫素計數器202會忽視所定出的位置値。否則 ’ ，該圖案分析器205或畫素計數器202會利用下列方程式計 · 算出一視頻控制區域相對於第7圖中Ρ〇”點的位置値： WIN_V_START=V_〇FFSET+V_START ; WIN一V—END=V_〇FFSET+V一END ; 鲁 WIN_H_START=RCV又START ; WIN_H_END=RCV_H_END ;及 V_BLANKPOS=V_OFFSET ° 第7圖係用以顯示一種代表以上述方程式爲基礎計算出 之視頻控制區域位置値的示意圖。如圖所示，WIN_V_START 和 WIN_V_END代表的是該視頻控制區域之上和下方邊緣相 對於點P。”的垂直位置，WIN_H_START和WIN_H_END代表的 φ 是該視頻控制區域之左和右側邊緣相對於相同參考點的水 平位置。除此之外，V_BLANKPOS代表的是該完整影像上可 選擇性地留白之視頻線的垂直位置。藉由使該完整影像上包 含如第7圖所示之主動式影像中最頂部一條視頻線的視頻 線留白，可令使用者不致在觀測一監視器屏幕上的線形圖案 時受到千擾。 當藉由定出該控制區域上所有必要的位置値而完全辨識 出該視頻控制區域時，增益控制器2 〇 6會根據該控制密碼內 - 18- 591957 所包含的一組預定視頻參數値設定出用於辨識該控制區域 的增益値。最後，視頻前置放大器20 7會據此放大其RGB 信號。 替代地，可藉由使用下列方程式以定出WIN_H_START和 WIN_H_END ： WIN—h_START=RCV_H—START+HDELAY1 ;及 WIN_H—END=RCV—H_END+HDELAY2 。 其中HDELAY1和HDELAY2代表的是用於補償當對已辨識之 使用者選擇區域的增益値進行放大時發生在該增益控制器 206之輸入與輸出間之延遲的額外調整値。 對熟悉習用技術的人而言很淸楚的是可在不偏離本發明 所附申請專利範圍之精神及架構下作各種修正和改變。因此 ’本發明的用意是涵蓋本發明的所有修正和改變型式，只要 它們係涵蓋於本發明所附申請專利範圍之架構及其等效項 目之內便成。 (五）圖式簡單說明 本發明所包含的各附圖係用以提供對本發明的進一步理 解，且本發明係將構成本發明之一部分的各附圖與各實施例 結合’並連同其說明扮演著解釋本發明原理的角色。 桌1圖顯不的是一種根據本發明的影像顯示器系統。 第2圖係用以顯示第1圖中根據本發明第一實施例之視頻 控制單元的示意圖。 第3圖係用以顯示第1圖中根據本發明第二實施例之視頻 控制單元的示意圖。 -19- 591957 第4圖係用以顯示一種表爲PC應用在視訊卡上所產生影 像資訊之原始（主動式）影像實例的示意圖。 第5圖係用以顯示一種顯示於CRT上以回應一影像信號以 及視訊卡 所 產 生 各同 步 信號之完整影像實例的示意圖。 第 6圖係用以顯不各冋步柄5虎以及用於線形圖案；^彳胃j 的示意圖 〇 第 7圖 係 用 以 顯示 一 種代表視頻控制區域位置的示f _ 主要元件 符 號 說 明 10 影 像 源 裝 置 11 視 訊 卡 12 應 用 單 元 20 陰 極 射 線 管監 視 器 21 視 頻 控 制 單元 22 監 視 器 中 央處 理 單元 23 主 視 頻 刖 置放 大 器 24 面 板 按 鍵 25 陰 極 射 線 管 201 位 準 偵 測 器 202 畫 素 計 數 器 203 線 計 數 器 204 圖 案 接 收 器 205 圖 案 分 析 器 2 0 6 增 益 控 制 器 207 視 頻 前 置 放大 器591957 发明 Description of the invention (The description of the invention should state: the technical field to which the invention belongs, the prior art, the content, the embodiments, and the drawings) (1) The technical field to which the invention belongs The present invention relates to a display device, and is more specific The invention relates to a display system for adjusting video parameters of a user-selected area. (2) Previous technology Standard computer-related display systems used cathode ray tube (CRT) monitors to display various types of data including video and text. In order to display video materials such as animations, charts, and photos on CRT monitors, it is often necessary to have a reasonably high level of luminosity because very many colors are used to provide realistic shadow effects and color changes. Increasing the luminosity range of the video data on the CRT monitor can make the video image richer in contrast and brightness and improve the visual quality of the image. However, compared to television systems, existing computer-related display systems such as CRT monitors or LCD displays often do not provide sufficient luminosity when displaying the above video materials. For example, when a video signal for a general television system is displayed on a general CRT monitor, the brightness of the displayed image is usually very low, and the image may appear too dark because of the brightness of existing computer-related display systems. The parameters are usually much smaller than the brightness parameters of TV systems. To eliminate this problem, it is necessary to have a display system that can increase the luminosity level of the user-selected area on the CRT monitor while keeping the luminosity of all other areas at a relatively low level. In this way-7-591957 'can greatly improve the visual image quality of the user's selected area without increasing the brightness of the entire monitor screen, and provide the necessary solutions for the above problems. (3) Summary of the Invention Based on this, The present invention is directed to a display system for adjusting video parameters of a user-selected area, so that it can substantially eliminate one or more problems caused by limitations and disadvantages of related conventional designs. An object of the present invention is to provide a display system for adjusting a video parameter of a user-selected area so that it can compensate for a delay occurring between a video signal and each horizontal synchronization signal received by the display system from an image source device. Another object of the present invention is to provide a display system for adjusting video parameters of a user-selected area so that it can compensate for vertical offset caused by different display settings between the display system and the image source device. . Reference can be made to the following description to enumerate other objects, features, and advantages of the present invention, and it will become apparent to those familiar with the conventional design due to the following tests or can be learned from the practice of the present invention. The objects and other advantages of the present invention will be realized and obtained by the following written description and the special structure indicated in the scope of the attached patent application. In order to achieve other objectives, a display system for adjusting video parameters of a user-selected area according to the present invention includes: a quasi-detector for detecting a plurality of representative image lines in a displayed complete image A linear pattern contained in one; a pattern receiver coupled to the level detector-8-591957 to receive a detected pattern including its endpoints aligned vertically with the vertical edges of the area A pattern of a position marker; and a pixel counter coupled to the pattern receiver to measure the end of each marker with respect to a reference point, that is, the first starting pixel of the topmost image line in the complete image The first set of horizontal positions. The display system further includes: a pattern analyzer for calculating a second horizontal position of each vertical edge on a video control area relative to the reference point based on the first horizontal position; and a video front The setting amplifier is used to adjust at least one video parameter on the video control area according to a predetermined set of video parameters included in the received pattern. In addition, the display system according to the present invention further includes a line counter coupled to the pattern receiver, so as to measure a vertical offset distance between the reference point and a line included in the pattern, wherein the pattern further includes the use of The user selects the first set of vertical positions of the horizontal edges of the selection area relative to the lines included in the pattern. Then, the pattern analyzer further calculates the second set of vertical positions of the horizontal edges of the control area relative to the reference point by respectively superimposing the offset distances on the first set of vertical positions. According to another aspect of the present invention, a display system for adjusting video parameters of a user-selected area includes a quasi-detector for detecting a plurality of representative images in a displayed complete image. A linear pattern contained in one of the lines; a pattern receiver coupled to the level detector so as to receive a position mark that detects that its endpoints are aligned vertically with the vertical edges of the area And a pixel counter, coupled to the pattern receiver, so as to measure the end point of each marker relative to a reference-9-591957 point, which is the first starting picture of the topmost image line in the complete image The first horizontal position of the prime. The display system further includes a monitor microprocessor coupled to the pattern receiver to calculate the vertical edges of a video control area relative to the reference point based on the first set of horizontal positions. A second set of horizontal positions, wherein the microprocessor is used to input pixel frequency information to the pixel counter; and a video preamplifier is used to perform at least one video parameter on the video control area. Adjustment. In addition, the display system further includes a line counter coupled to the pattern receiver to measure a vertical offset distance between the reference point and a line included in the pattern, wherein the pattern further includes a user-selected area. Each horizontal edge is relative to the first set of vertical positions of the pattern's embedded lines. Then, the monitor microprocessor superimposes the offset distances on the first set of vertical positions respectively to further calculate the first set of vertical positions of each horizontal edge on the control area with respect to the reference point. I should understand that the foregoing general description and the following detailed description of the present invention are both typical and explanatory, and are intended to provide further explanation of the present invention within the scope of the patent application attached to the present invention. (IV) Embodiments Now, I will explain embodiments of the present invention in detail with reference to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. FIG. 1 shows an image display system according to the present invention. Referring to FIG. 1, the image display system includes: an image source device (such as a computer device) 10 for generating video signals (R / G / B (red / green / blue light) signals) and horizontal and vertical synchronization signals (H-SYNC and V-SYNC signals); and a negative -10-591957 polar ray tube (CR T) monitor 2 0 'is used to receive the R / G / B number and SYNC from the image source device 10 Signal 'and display an image in response to each r / (3 / β signal and SYNC signal. The image source device 10 includes an application unit (such as an installed program or driver unit) 12 for receiving representatives Information of the original image (active image) and superimposing a linear pattern on the top image line of the active image; and a video card 11 for receiving video information representing the active image with the pattern superimposed and generating A video signal and corresponding H-SYNC and V-SYNC signals. The linear pattern includes the position of a user-selected area relative to a reference point P ′ on the active image. On the other hand, the CRT monitor 20 System contains: Panel button 24 ; Monitor CPU (monitor central processing unit, such as a microprocessor) 22;-video control unit 2 1;-main video preamplifier 2 3; and a cathode ray tube (CRT) 2 5. The video control unit 2 1 will initially receive the R / G / B signal and SYNC signal from the video card 1 1 and will determine a video control area relative to the reference point P on the complete image actually displayed on the CRT 25 " Position, adjust video parameters such as brightness, contrast, sharpness, and highlighting of the user's selected area. The video control unit 21 will receive pixel frequency information from the monitor CPU 22 to adjust the The distance (number of pixels) between the left and right edges of the user-selected area relative to the reference point P is measured appropriately. Finally, each panel button 24 will receive instructions from the user to control the CRT surveillance Display settings of the monitor 20, and the main video preamplifier 23 will amplify the R / G / B signals that are processed in the video control unit 21 1. -11-591957 Figures 2 and 3 are used to display 1 CRT monitor shown in the figure Schematic diagram of the video control unit 21 in the viewer 20 according to the first and second embodiments of the present invention. Referring to FIG. 2, the video control unit 21 includes: a quasi-detector 20 1 ′ for detecting A linear pattern included in one of the plurality of representative image lines 1 in the entire image displayed on the CRT monitor 20 shown in FIG. 5; and a pattern receiver 2 0 4 'is coupled to the The level detector 201 is provided so as to receive the detected linear pattern. The received linear pattern includes a position marker whose endpoints are aligned vertically with the vertical edges of the area, and includes a marker for indicating the The first set of vertical positions of the horizontal edges of the user-selected area relative to the lines included in the pattern. The level detector 20 1 further includes: a pixel counter 2 0 2 coupled to the pattern receiver 2 0 4 so as to measure the endpoints of each marker relative to a reference point, that is, the most in the complete image. The first set of horizontal positions of the first starting pixels of the top image line; and a line counter 20 3 ′ is coupled to the pattern receiver 204 to measure the vertical deviation between the reference point and the pattern's embedded lines Move the distance. Then, the pattern analyzer 205 calculates a set of horizontal positions of each vertical edge on a video control area relative to the reference point based on the horizontal positions of the end points of each marker, and the offset distances are respectively determined by Superimposed on the vertical position contained in the pattern, further calculate a set of vertical positions of each horizontal edge on the control area relative to the reference point. Finally, the level detector 201 includes: a gain controller 206 'is used to set a video control for the control area according to a set of predetermined video parameters included in the pattern; The gain 値 · and a video preamp 207 are used to amplify the RGB signal accordingly. Except that the pattern analyzer 205 is omitted, the video control unit 591957 shown in FIG. 3 is identical to the video control unit 21 shown in FIG. 2. Instead, the monitor CPU 22 calculates the position of the control area relative to the reference point in a similar manner, and the gain controller 206 sets a video control gain 値 for the control area. In this way, the structure of the level detector 201 can be greatly simplified. FIG. 4 is a schematic diagram showing an example of an active image in which a table is provided by the application unit 12 on the video card 11 shown in FIG. 1. The application unit 12 of the image source device 10 will allow the user to select a necessary area (such as a rectangular box as shown in Fig. 4) and adjust one or more of the selected areas. For example, a mouse pointer (unlabeled) controlled by a mouse (not labeled) connected to the image source device 10 can be used to click the upper left corner of a necessary area and pull the pointer to the right of the necessary area. Bottom corner to select the necessary area. Alternatively, the user can select the necessary area only by clicking at least one window that has been recently displayed on the monitor screen, or by pressing one or more key buttons provided on the keyboard. When the user selects the necessary area, the application unit 12 will measure and store the location information of the selected area. The position information includes vertical positions V_START and V_END representing the upper and lower edges of the user-selected area relative to a reference point on the active image (for example, P. in Fig. 4). The application unit 12 may further measure the left and right edges of the user-selected area relative to P. The horizontal positions H_START and H_END, but these numbers are not necessary parameters for adjusting the video parameters of the user-selected area according to the present invention. The application unit 12 stores the data of each vertical position in the form of a line and stores the horizontal position in the form of a pixel. This is because the coordinate system used in this application sheet is to express the vertical and horizontal positions of any point on the active image in the form of lines and pixels, respectively. Then, after obtaining the required coordinate information, the application unit 12 superimposes a linear pattern on the top line of the active image. The linear pattern contains pattern data including coordinate information (V_START and V-END) of the user-selected area, a control password, and a pattern confirmation password (such as the sum of the rows and columns). The linear pattern may further include the user-selected area relative to P. ’Horizontal position. The control password refers to the video control parameters including brightness, contrast, sharpness and highlighting. The application unit 12 includes a data confirmation password such as the sum of rows and columns to ensure that the pattern data can be properly transmitted. The data confirmation password allows the video control unit 21 or the monitor CPU 2 2 to confirm the transmitted pattern. The data does not change during transmission and prevents any non-patterned parts detected on the video signal from being used as pattern data. Generally, the sum of the rows and columns refers to the total number of the representative numbers in all characters in the transmitted pattern data that can be determined by the application unit 12 and the monitor CPU 2 2 (or the video control unit 21). The monitor CPU 22 can confirm the pattern data contained in the linear pattern by comparing the sum of the rows and columns contained in the pattern data with the newly determined sum of the columns and rows. Looking at FIG. 1, after the video card 11 of the image source device 10 receives image information for defining an active image superimposed with a pattern from the application unit 12, the video card 11 generates an RGB signal And horizontal and vertical synchronization signals (H-SYNC and V-SYNC) to display an image and control the operation of the CRT monitor 20. Then, the video control unit 21-1 4-591957 of the CRT monitor 20 will receive RGB and each SYNC signal, and according to a set of predetermined parameters composed of a control password, at least the brightness, contrast, Adjust one of the sharpness and highlight parameters. After that, the pre-amplified RGB signal is sent to the main video pre-amplifier 23 to amplify the RGB signal and display the RGB signal with a CRT 25. FIG. 5 is a schematic diagram showing an example of a complete image displayed on the CRT 25 in response to the RGB signals received from the video card 11 and each SYNC signal. Referring to Figure 5, I should note that the complete image actually displayed on the CRT 25 does not exactly coincide with the active image shown in Figures 4 and 5, but is due to the CRT monitor 20 and the application The different display settings between the units 12 may be larger than the full image of the active image. For example, the coordinate system used to represent the position of a point on the complete image shown in Figure 5 may be different from the coordinate system used to represent the position of a point on the active image shown in Figure 4. In other words, the position of any point on the complete image is measured relative to a reference point (such as P. ") on the complete image and not a reference point (such as P. ') on the active image. In addition, delays often occur between the CRT monitor 20 receiving RGB from the video card 11 and the various SYNC signals. These delays may even cause greater inconsistencies between the complete image and the active image Figure 6 is a schematic diagram showing the H-SYNC and V-SYNC signals and the signals for the linear pattern received by the video control unit from the video card 11. As explained earlier, this corresponds to the active image The video signal of the uppermost line on the top contains a pattern signal. The pattern signal includes signals such as PCLOCK, PDATA, and PWINDOW, each of which may be included in each of the RGB signals of -15-591957. About the 5th and 6th More detailed details of the figure can be further explained as follows. The image display system according to the present invention will now be described in detail with reference to FIGS. 1 to 3. At the beginning, the video preamp 2 0 7 and the level detector 2 0 1 Will start to receive the RGB signals and H-SYNC and V-SYNC signals from the video card 1 1 of the video source device 10. Looking at Figure 6, the line counter 20 3 will initially detect the first at time = T1 V-SYNC pulse and first H-SYNC pulse. Each detected synchronous pulse represents the starting line (Pc) of the topmost video line on the complete image as shown in Figure 5. ,). Between T 1 and T 2, the line counter 2 0 3 of the video control unit 21 will continue to count the number of video lines on the complete image until T 2 by detecting further Η-SYNC pulses. When time = T2, the line counter 203 detects a Η-SYNC pulse corresponding to the starting point of the video line containing the linear pattern on the complete image. Thereafter, the pattern receiver 2 of the video control unit 21 1 0 4 will detect the first rising edge of PCLOCK at time: rT 3. At this time, the pattern receiver 204 will determine V which represents the number of video lines detected by the line counter 20 3 between T1 and T2. -OFFSET. In other words, V_OFFSET represents the top line on the complete image and the one shown in Figure 5. The vertical distance between the image lines containing the pattern. In addition, the pattern receiver 204 will extract the pattern data from the PDATA signal received from the level detector 20 1. The PDATA signal refers to a Figure 6 shows a signal containing "0" or "1" depending on the pattern data contained in it. As mentioned earlier, the pattern data retrieved is -16- 591957 containing V_START and V_END, a control password, and a row and column sum. Among them, V_START and V_END represent the vertical positions of the upper and lower edges of the user-selected area relative to a reference point on the active image (for example, P. in Figure 4). The control password refers to a password that includes the brightness of the area selected by the user, and other types of video parameters such as contrast, sharpness, and highlighting. The sum of rows and columns refers to a pattern confirmation password that allows the pattern receiver 204 or the monitor CPU 22 to confirm the received pattern data. The pattern signal received by the pattern receiver 204 from the level detector 201 further includes a PWINDOW signal for indicating the horizontal position of the user-selected area relative to the point P0 in FIG. 5. In Figure 6, the pattern receiver 204 will detect the rising edge of the PWIND0W signal at time = T4. Next, the pattern receiver 204 will count the number of pixels between T2 and T4 using the pixel counter 202 In order to determine the horizontal position of the left edge of the user-selected area relative to P in Figure 5, the * PCV_H_START signal. The pixel counter 202 uses the pixel frequency information provided by the monitor CPU 22 to count each pixel. After that, the pattern receiver 204 detects the falling edge of the PWIND0W signal at time = T5. Similarly, the pattern receiver 204 will use the pixel counter 2 0 to determine the right edge of the area selected by the user relative to P in Figure 5. RCV_H__END signal at the horizontal position of the dot. Again, the pixel counter 202 counts the number of pixels existing between T2 and T5. All signals such as V_〇FFSET, RCV__H_START and RCV —H —END are determined and fully received After reaching the pattern data, the pattern receiver 2 0 4 will send the position from -17- 591957 to the pattern analyzer 2 0 5 or the pixel counter 2 0 2. Then, the pattern analyzer 2 0 5 Or the pixel counter 2 0 2 compares the sum of rows and columns contained in the pattern data with the newly determined sum of rows and columns to confirm whether the pattern data is correct. If the pattern data is found to be incorrect, the pattern analyzer 205 or pixel counter 202 will ignore the determined position. Otherwise, the pattern analyzer 205 or pixel counter 202 will use the following equation to calculate the position of a video control area relative to the point “PO” in Figure 7.値: WIN_V_START = V_〇FFSET + V_START; WIN_V_END = V_〇FFSET + V_END; Lu WIN_H_START = RCV and START; WIN_H_END = RCV_H_END; and V_BLANKPOS = V_OFFSET ° Figure 7 is used to display a generation In the above equation is calculated on the basis of a video control area Zhi position of FIG. As shown, WIN_V_START and WIN_V_END represent the upper and lower edges of the video control area relative to point P. ”Vertical position, φ represented by WIN_H_START and WIN_H_END is the horizontal position of the left and right edges of the video control area relative to the same reference point. In addition, V_BLANKPOS represents the optional blank space on the complete image The vertical position of the video line. By leaving the video line of the top video line in the active image as shown in Figure 7 blank on the complete image, users can not observe the line shape on a monitor screen The pattern is subject to a lot of disturbances. When the video control area is fully identified by determining all the necessary positions on the control area, the gain controller 2 06 will be based on the control code contained in-18- 591957. The set of predetermined video parameters 値 sets the gain 辨识 used to identify the control area. Finally, the video preamp 20 7 will amplify its RGB signal accordingly. Alternatively, WIN_H_START and WIN_H_END can be determined by using the following equations: WIN —H_START = RCV_H—START + HDELAY1; and WIN_H—END = RCV—H_END + HDELAY2. Among them, HDELAY1 and HDELAY2 are used to compensate when the identified The user selects the gain of the area 的 additional adjustment of the delay that occurs between the input and output of the gain controller 206 when zooming in. It is clear to those skilled in the art that it can be used without departing from the scope of the present invention. Various amendments and changes are made under the spirit and framework of the scope of the patent application. Therefore, 'the intention of the present invention is to cover all the amendments and changes of the invention, as long as they are within the framework of the scope of the patent application attached to the present invention and its equivalent (5) Brief description of the drawings The drawings included in the present invention are provided to provide a further understanding of the present invention, and the present invention is a combination of the drawings and embodiments that form a part of the present invention. Together with its description, it plays a role in explaining the principles of the present invention. Table 1 shows a video display system according to the present invention. Figure 2 shows the video control according to the first embodiment of the present invention in Figure 1. Schematic diagram of the unit. Figure 3 is a diagram showing the video control unit according to the second embodiment of the present invention in Figure 1. -19- 591957 Figure 4 is used A schematic diagram showing an example of an original (active) image of the image information generated by a PC application on a video card is shown in Figure 5. Figure 5 is used to display a display on the CRT in response to an image signal and each synchronization signal generated by the video card Schematic diagram of a complete image example. Figure 6 is used to show each step 5 tigers and used for a linear pattern; ^ 彳 stomach j is a schematic diagram. Figure 7 is used to display a representation of the position of the video control area _ Explanation of main component symbols 10 Image source device 11 Video card 12 Application unit 20 Cathode ray tube monitor 21 Video control unit 22 Monitor central processing unit 23 Main video amplifier 24 Panel buttons 25 Cathode ray tube 201 Level detector 202 Pixel Counter 203 Line Counter 204 Pattern Receiver 205 Pattern Analyzer 2 0 6 Gain Controller 207 Video Preamplifier