A7 B7 d蠛 五、發明說明（1 ) 【發明之所屬技術領域】 本發明係關於液晶面板之閃爍測定者。 【習知之技術】 · 習知上，在生產線等爲了液晶面板之調整用，利用頻 譜分析儀以進行液晶面板之閃爍値測定。具體而言，藉由 配置於液晶面板之銀幕面上之光傳感器，檢測液晶面板之 亮度，而且，將此檢測出之亮度信號輸入頻譜分析儀，進 行該亮度信號之頻譜顯示》液晶面板由於該個體差（背光 之亮度之偏差）以及使用於檢査之圖像圖案之平均亮度， 面板面亮度不同之故，在閃爍値之測定上，讀取此顯示頻 譜內之D C成分之値，即面板面亮度成分以及顯示頻 譜之AC成分（3 OHz )之峰値.峰値，即閃爍成分V, ，而且，有必要計算這些之比，即Vf/Vd€。此計算出 之比成爲閃燦値。 【發明欲解決之課題】 在上述習知之測定法中，液晶面板之個體差等之故， 必須進行每個液晶面板之與Vf之2値之讀取，與這 些之比k運算，對於測定者而言，變成麻煩之作業。又， 設備上需要髙價之頻譜分析儀。 因此，本發明之目的在於提供閃爍値之測定容易進行 之液晶面板閃爍測定方法及裝置。 本紙張尺度適用中國國家摞準（CNS)A4规格<210 * 297公* ) — ---―裝.—· <锖先W讀背面之注意事項再填寫本頁) -HI ^ ilm . 經濟部智慧財產局員工消费合作杜印製 經濟部智慧財產局Λ工消费合作社印製 4344 t Q® a? _B7 五、發明說明fc ) 【解決課題用之手段】 爲了達成上述目的，依據本發明之液晶面板之閃爍測 定方法，係由1 )檢測被測.定對象之液晶面板之表面亮度 以獲得亮度信號之步驟*及2 )正規化該亮度信號之步驟 ，3)由該正規化之亮度信號之A C成分產生閃爍値之步 驟所構成。 依據本發明，上述正規化步驟可以包含：藉由自動增 益控制上述亮度信號，使上述亮度信號之D C成分成爲規 定値者。 又，依據本發明之液晶面板之閃爍測定裝置係由：1 )檢測被測定對象之液晶面板之表面亮度以產生亮度信號 之檢測手段，及2 ) —種接收上述亮度信號地連接之，產 生上述液晶面板之閃爍値之閃爍値產生電路，其係包含： a )藉由自動增益控制上述亮度信號，上述亮度信號之 D C成分成爲規定値地，正規化上述亮度信號之自動增益 控制電路，及b )接收由該自動增益控制電路之輸出之被 正規化信號，由該信號分離A C成分所獲得之A C成分分 離電路，及c )由上述A C成分之振幅獲得閃爍値之電路 之上述閃爍値產生電路所構成。 【發明之實施形態】 接著，在以下參考臞面說明本發明之實施形態。 圖1係顯示依據本發明之液晶面板閃爍測定裝置之方 塊圖。此閃爍測定裝置係測定測定對象之液晶面板1之閃 (請先W讀背面之注意事項it填 寫本頁> 裝 訂- .線 本紙張尺度適用中國S家標準（CNS)A4規格<210* 297公釐） -5- A7 f4344 1 〇ί* ___B7____ 五、發明說明6 ) 爍値者，如圖示般地，以配置於液晶面板1之銀幕之光傳 感器1 0，以及閃爍値產生電路2 0，及顯示器3 0所構 成》閃爍値產生電路2 0係以放大器2 1及自動增益控制 (AGC)電路2 2以及AC成分分離電路2 3以及檢波 電路2 4所構成。. 詳細來說，測定對象之液晶面板1爲像素反轉型或線 反轉型之任一種之形態者皆可。接近此液晶面板之銀幕配 置之光傳感器1 0檢測由液晶面板之銀幕面來之光，在输 出產生顯示該亮度之亮度信號。輸入連接於光傳感器1 0 之輸出之放大器21放大由光傳感器10來之亮度信號。 在此時間點之亮度信號乂8具有D C成分與A C成分（頻率 30Hz) *DC成分爲面板面亮度成分Vde，AC成分 爲閃爍成分Vf·此1例顯示於圖2之（a) »此放大之亮 度信號施加於AGC電路2 2之輸入，而且，AGC電路 2 2將接收之放大亮度信號藉由自動增益控制或比例法對 於基準値乂^正規化。此正規化亮度信號Vn之1例顯示於 圖2之（b)，面板面亮度成分成爲Vu'，而且，閃爍 成分成爲乂（ /。接著 > 施在AC成分分離電路2 3之輸入 ，而且，此電路2 3由此亮度信號將此信號內之A C成分 藉由濾k等分離之。此分離之AC成分接著藉由以檢波電 路2 4進行檢波，產生顯示A C成分之峰値.峰値之D C 電壓。此DC電壓接著施加於顯示器30，而且，藉由此 電壓以顯示閃爍値· 依據本發明之此液晶面板.閃爍測定裝置，如上述般 -6 - (锖先«讀背面之注意事項再填寫本I > Γ 裝 訂· --線· 缦濟部智慧财產局貝工消费合作社印製 本紙張尺度適用中因國家標準（CNS)A4规格（210 * 297公* ) 經濟部智慧財產局R工消黌合作社印製 ▲344 1 0_ A7 __B7_;_ 五、發明說明Cl ) 地，閃爍値被直接顯示之故，不需要習知之測定法之値的 讀出以及比之計算，可以進行閃爍値之直接讀出。此閃爍 値被使用於液晶面板之閃爍調整用之相向電極輸入電壓 v。»之調節❶ 接著，參考圖3說明AGC電路2 2之1實施形態。 如圖示般地，AGC電路2 2具備運算放大器2 2 0，此 運算放大器2 2 0具有接收亮度信號V*之非反轉輸入，與 產生正規化亮度信號V»之輸出端子。此運算放大器2 2 0 具有：決定此放大器之增益之電阻器R1與如鎘電池之光 感知型之可變電阻器R 2，該電阻器R1連接於輸出端子 與反轉輸入之間，可變電阻R 2連接於反轉輸入與接地之 間。又，電路2 2具備：連接於運算放大器2 2 0之輸出 端子與接地之間之電阻器R 3，以及由電容器C形成之低 通濂波器，以及具有接收此俱通濾波器之輸出之反轉输入 之運算放大器2 2 2 ·低通濾波器設定截止頻率成爲雖然 可以通過D C成分，伹是不會通過閃爍成分。運算放大器 2 2 2其之反轉輸入連接於基準電壓Vr之電源2 2 4，而 且，輸出端子連接於發光二極體D之陽極。此二極體之陰 極連接於接地》 此人G C電路2 2之動作如下所述•即，首先，亮度 信號V «之D C成分，即平均値比基準電壓丫^大時，Vn 之D C成分也比V,大之故，運算放大器2 2 2之輸出更成 爲負，LED之發光量減少，因此，可變電阻器R2之電 阻增大。由於此增大，運算放大器2 2 0之增益減少，作 - ----------「裝.— ί <請先閱讀背面之注意事項再填寫本頁) n n 訂-----A7 B7 d 蠛 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a person who measures the flicker of a liquid crystal panel. [Known Techniques] · Conventionally, in production lines, etc., for the adjustment of liquid crystal panels, a spectrum analyzer is used to measure the flicker of the liquid crystal panel. Specifically, the brightness of the liquid crystal panel is detected by a light sensor disposed on the screen surface of the liquid crystal panel, and the detected brightness signal is input to a spectrum analyzer to perform a spectrum display of the brightness signal. The individual difference (the deviation of the brightness of the backlight) and the average brightness of the image pattern used for the inspection. The brightness of the panel surface is different. On the measurement of the flicker, the ratio of the DC component in the display spectrum is read, that is, the panel surface. The peak value of the luminance component and the AC component (3 OHz) of the display spectrum. The peak value is the flicker component V, and it is necessary to calculate these ratios, namely Vf / Vd €. This calculated ratio becomes Shan Chan. [Problems to be Solved by the Invention] In the conventional measurement method described above, the individual difference of the liquid crystal panel must be read, and 2% of Vf of each liquid crystal panel must be read, and the ratio k of these must be calculated. In other words, it becomes a troublesome task. In addition, expensive spectrum analyzers are required on the equipment. Therefore, an object of the present invention is to provide a method and an apparatus for measuring a scintillation of a liquid crystal panel, in which the measurement of scintillation can be easily performed. This paper size applies to China National Standards (CNS) A4 specifications < 210 * 297 male *)-----installed.-≪ 锖 W read the precautions on the back before filling out this page) -HI ^ ilm. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs for consumer cooperation Du printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and printed by the Industrial Cooperative Cooperative, 4344 t Q® a? The method for measuring the flicker of a liquid crystal panel consists of 1) detecting the brightness of the surface of the liquid crystal panel of the object to be measured and obtaining the brightness signal * and 2) the step of normalizing the brightness signal, and 3) the normalized brightness A step in which the AC component of the signal generates a flickering chirp. According to the present invention, the normalization step may include: controlling the brightness signal by automatic gain so that the DC component of the brightness signal becomes a predetermined person. In addition, the flicker measuring device of the liquid crystal panel according to the present invention is composed of: 1) a detection means for detecting the brightness of the surface of the liquid crystal panel of the object to be measured to generate a brightness signal, and 2) a kind of connection that receives the brightness signal and generates the above A flickering / flickering generating circuit of a liquid crystal panel includes: a) an automatic gain control circuit that controls the brightness signal by an automatic gain, the DC component of the brightness signal becomes a predetermined ground, and normalizes the brightness signal, and b ) Receiving the normalized signal output from the automatic gain control circuit, an AC component separation circuit obtained by separating the AC component from the signal, and c) the above-mentioned flicker generation circuit of the circuit that obtains the flicker from the amplitude of the AC component Made up. [Embodiments of the invention] Next, embodiments of the invention will be described with reference to the following. Fig. 1 is a block diagram showing a flicker measurement device for a liquid crystal panel according to the present invention. This flicker measuring device measures the flicker of the liquid crystal panel 1 of the measurement object (please read the precautions on the back first and fill out this page> Binding-. The size of the threaded paper is applicable to China S Standard (CNS) A4 specifications < 210 * 297 mm) -5- A7 f4344 1 〇ί * ___B7____ V. Description of the invention 6) The brighter, as shown in the figure, is provided with a light sensor 10 on the screen of the liquid crystal panel 1 and a blinking light generating circuit 2 0 and display 30 are composed of flicker generation circuit 2 0, which is composed of amplifier 21, automatic gain control (AGC) circuit 22, AC component separation circuit 23, and detection circuit 24. In detail, the liquid crystal panel 1 to be measured may be any one of a pixel inversion type and a line inversion type. A light sensor 10 arranged near the screen of the liquid crystal panel detects the light coming from the screen surface of the liquid crystal panel, and generates a brightness signal at the output which displays the brightness. The amplifier 21 whose input is connected to the output of the photosensor 10 amplifies the luminance signal from the photosensor 10. The brightness signal at this time point 8 has a DC component and an AC component (frequency 30Hz) * The DC component is the panel surface brightness component Vde, and the AC component is the flicker component Vf. This example is shown in (a) of Figure 2 »This zoom The luminance signal is applied to the input of the AGC circuit 22, and the AGC circuit 22 normalizes the received amplified luminance signal to the reference signal by automatic gain control or proportional method. An example of this normalized luminance signal Vn is shown in (b) of FIG. 2, the luminance component of the panel surface becomes Vu ′, and the flicker component becomes 乂 (/. Then> is applied to the input of the AC component separation circuit 23, and This circuit 2 3 separates the AC component in the signal from the luminance signal by filtering k, etc. The separated AC component is then detected by the detection circuit 2 4 to generate a peak showing the AC component 成分. 峰 値DC voltage. This DC voltage is then applied to the display 30, and the voltage is used to display the flicker. · The liquid crystal panel according to the present invention. The flicker measuring device is as described above. Please fill in this item I > Γ Binding ·-Thread · Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperative Co., Ltd. This paper is printed due to the national standard (CNS) A4 specification (210 * 297 public *) Ministry of Economic Affairs Printed by the R Bureau of Industrial Property Co., Ltd. ▲ 344 1 0_ A7 __B7 _; _ V. Description of the invention Cl) The reason that the flickering 値 is displayed directly, the reading of the 値 and the calculation of the ratio are not necessary. Read the flashing light directly. This flashing相 The counter electrode input voltage v used for adjusting the flicker of the liquid crystal panel is adjusted by ». Next, an embodiment of the AGC circuit 2 2 will be described with reference to FIG. 3. As shown in the figure, the AGC circuit 2 2 includes an operational amplifier 2 2 0, this operational amplifier 2 2 0 has a non-inverting input for receiving the luminance signal V * and an output terminal for generating a normalized luminance signal V ». This operational amplifier 2 2 0 has: a resistor R1 which determines the gain of the amplifier And a light-sensing variable resistor R 2 such as a cadmium battery, the resistor R 1 is connected between the output terminal and the inverting input, and the variable resistor R 2 is connected between the inverting input and the ground. Also, the circuit 2 2 has: a resistor R 3 connected between the output terminal of the operational amplifier 2 2 0 and the ground, a low-pass chirped wave formed by the capacitor C, and an inverting input that receives the output of the pass-through filter Operational amplifier 2 2 2 · The cut-off frequency of the low-pass filter is set to pass the DC component, but 伹 does not pass the flicker component. The inverting input of the operational amplifier 2 2 2 is connected to the power source 2 2 4 of the reference voltage Vr, andThe output terminal is connected to the anode of the light-emitting diode D. The cathode of this diode is connected to the ground "The operation of this person's GC circuit 2 2 is as follows: That is, first, the DC component of the luminance signal V«, that is, the average 値When it is larger than the reference voltage ^, the DC component of Vn is also larger than V. Therefore, the output of the operational amplifier 2 2 2 becomes more negative, and the amount of light emitted by the LED decreases. Therefore, the resistance of the variable resistor R2 increases. If this increase, the gain of the operational amplifier 2 2 0 will decrease. Make----------- "install. — Lt, please read the precautions on the back before filling this page) nn Order ---- -
H 1· I 線 Ί 本紙張尺度適用中困S家標準（CNS〉A4规格（210 X 297公釐〉 經濟部智慧財產局典工消费合作社印製 :44 t 0場 Α7 _______Β7_ ._五、發明說明（δ ) 用使得vn之平均値降低。又，V ：>之平均値在比基準電壓 vr還低時，與上述相反地作用，運算放大器之增益變大。 藉由此反饋控制，正規化亮度電壓Vn之D C成分成爲經常 與基準電壓Vr—致。藉由如此，可以進行亮度之正規化· · 將基準電壓Vr設定爲例如成爲0 d B之値，V("之讀數就 變成閃爍値，藉由此•閃爍値可以直接謓取》 接著，對於上述之本發明之1實施形態，可以有以下 之類的變更。第1:在上述實施形態中，雖然只使用類比 電路實現亮度信號之正規化，但是檢測亮度信號V·之 後，將這些値使用微電腦等數位處理之，也可 以進行本發明之正規化。第2 :在上述實施形態中，雖然 只進行閃燦値之顯示，但是使用此閃爍値，也可以應用於 V cem電壓之自動調整® 【發明之效果】 以上，依據本發明，可以做閃爍値之直接讀取，藉由 此，起因於液晶面板之個體差等之每個液晶面板所需要之 麻煩讀取以及運算變成不需要。此結果，在液晶面板之生 產線等，液晶面板之閃爍値可以低成本簡單地測定之。 鵪 【圖面之簡單說明】 圖1係依據本發明之液晶面板閃爍値測定裝置之方塊 圖》 圚2係顯示圖1之裝置之動作波形匾· 本紙張尺度適用中國囲家標準（CNS)A4規格（210 * 297公釐） (請先》讀背面之注意事項再填寫本頁} -裝 訂. :線 Γ -8 - 4344 1 0馕 Α7 經濟部智慧財產局具工消费合作社印製 Β7 _ 五、發明說明) 圖3係顯示圖1之裝置內之自動增益控制電路之詳細 電路圖。 '【標號之說明】 - 1 :液晶面板， 1 0 :光傳感器| 2 1 :放大器， 22:自動增益控制（AGC)電路， 2 3 : A C成分分離電路， 2 4 :檢波器， 3 0 :顯不器^ V a :亮度信號， V d。：面板面亮度成分， V f :閃爍成分， V r :基準値， V „ :正規化亮度信號， 2 2 0，2 2 2 :運算放大器| Vd。—：正規化面板面亮度成分， V f < :正規化閃爍成分， R 3，’C :低通濾波器 {請先閱讀背面之注意事項IT填寫本頁}H 1 · I Line Ί This paper's standard applies to the standard of medium-sized and poor families (CNS> A4 size (210 X 297 mm) Printed by the Code of Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs: 44 t 0 field A7 _______ Β7_ ._V. Invention Explanation (δ) reduces the average 値 of vn. In addition, when the average 値 of V: > is lower than the reference voltage vr, it acts contrary to the above, and the gain of the operational amplifier becomes large. With this feedback control, the normal The DC component of the luminance voltage Vn is often consistent with the reference voltage Vr. By doing so, the luminance can be normalized. · When the reference voltage Vr is set to, for example, 0 d B, the reading of V (" becomes Blinking 値, so that you can directly capture it by "blinking》" Next, the above-mentioned one embodiment of the present invention can be modified as follows. First: In the above embodiment, although only the analog circuit is used to achieve brightness The signal is normalized, but after the luminance signal V is detected, these signals can be digitally processed using a microcomputer or the like, and the present invention can also be normalized. Second: In the above-mentioned embodiment, although only Display, but using this flicker can also be applied to the automatic adjustment of the V cem voltage. [Effects of the invention] Above, according to the present invention, the flicker can be read directly. As a result, the individual difference caused by the liquid crystal panel The troublesome reading and calculation required for each liquid crystal panel becomes unnecessary. As a result, the flicker of the liquid crystal panel can be easily measured at low cost in the production line of the liquid crystal panel, etc. [Simplified description of the drawing] Figure 1 is a block diagram of the flicker of a liquid crystal panel according to the present invention; 値 2 is a block diagram showing the operation waveforms of the device of Fig. 1 · This paper size is in accordance with China National Standard (CNS) A4 (210 * 297 mm) ( Please read the precautions on the back before filling out this page}-Binding.: Line Γ -8-4344 1 0 馕 Α7 Printed by the Consumer Goods Cooperative of the Intellectual Property Bureau of the Ministry of Economy Β7 _ 5. Description of the invention Detailed circuit diagram of the automatic gain control circuit in the device of 1. '[Description of the number]-1: LCD panel, 1 0: Light sensor | 2 1: Amplifier, 22: Automatic gain control (AGC) circuit, 2 3 : AC component separation circuit, 2 4: Detector, 3 0: Display device ^ V a: Luminance signal, V d.: Panel surface luminance component, V f: Flicker component, V r: Reference signal, V „: Regular Normalized luminance signal, 2 2 0, 2 2 2: Operational amplifier | Vd. —: Normalized panel surface luminance component, V f <: Normalized flicker component, R 3, 'C: Low-pass filter {Please read first Note on the back IT fill out this page}
S 裝 訂·· -線 Γ 本紙張尺度適用中國國家楳準（CNS>A4規格（210 X 297公釐） -9 ·S Binding ·· -Line Γ This paper size is applicable to China National Standard (CNS > A4 size (210 X 297 mm) -9 ·