A7 B7 305971 五、發明説明（ (請先閱讀背面之注意事項再填寫本頁) 本案係一種游標控制裝置'^移之方法 游標控制裝置（如滑鼠、軌跡球等裝會主荽是以一 滾球之轉動來控制電腦螢幕游標之移動方向及距離；在游 標控制裝置中對滾球移動位移之偵測，一般除了以X，γ方 向光柵輪之設置來偵測電腦游標應於X或γ軸移動，仍需偵 測滾球於X軸之左右方向，γ軸之上下方向之移動狀態，方 可正確地控制螢幕游標之位移》 對於滾球於Χ,Υ軸之左、右、上 '下方向之位移偵測 有二種習知裝置。 經濟部中央標準局員工消費合作社印裝 第一種習知裝置係於X軸方向置二個光二極體 (photo diode)及二個光電晶體（photo t r a n s i s t 〇 r )，於該二個光二極體與該二光電晶體之間 設有一 X光柵輪，X光柵輪之表面圓周設有複數個同等尺寸 之開孔可於受該二光二極體光線照射時產生透光、遮光之 效應，該二光電晶體接收該透光'遮光效應，再經一整型 電路之處理而產生二串具相位差之等脈寬脈波訊號（如圖 一所示），該二相差之等脈寬脈波訊號將產生週期性之 (1，1 ) — (0,1)- (0,0)- (1,0)- (1,1)-…狀 態’以（1，1 )爲例，如果（1，1 )狀態之下一狀態 (〇 , 1 )，表示往右之位移，如果（1 ,"狀態之下一狀態爲 (1，〇 )，則表示往左之位移；當然，Y方向之偵測方式與 X方向相同》 第一種習知裝置之缺失如下= 本紙張尺度速用中國國家梯準（CNS ) A4規格（210X297公釐） 305371 A7 B7 光極體與二 X軸方面，丄 五、發明説明（2 1 ·爲了各於X, γ軸產生二串具相差之脈波訊號，則必須 於Χ，Υ軸各設二個光二極體及二個光電晶體’不僅提局了 材料成本，亦增長了生產組裝時所需花費之工時。 2 ·爲了精確地產生最佳之相位差，光二極體，光柵輪之 開孔與光電晶體間之相對位置必須準確地對準，俾調整感 光角度，徒增生產作業流程之困擾。 3·二脈波間之相位差易受光柵輪上之各開孔間之距離所 影響，使得訊號相位差不明顯，因而無法明確辨別左、 右、上、下方向；再者，如果受到外界之干擾（例如光線 或RS232埠之電壓不穩定），亦將使得光二極體與光電晶 體產生漣波現象，因而產生一連串無效脈寬之脈波訊號。 第二種習知裝置與第一種習知裝置之偵測方式相同， 都是以產生二串具相位差之同脈寬脈波爲辨識方向之手段, 唯一不同之處在於，第一種習知裝置係將Χ，Υ軸上之二個 光晶體分開設置，而第二種習知裝置則是於 I 一個光二極體照射包裝在一起之二個光電 晶體，Υ軸亦是如此，這種包裝將可減少二顆光二極體之 材料成本與二顆光電晶體之包裝成本，但因爲其方向辨識 手段與第一種習知裝置相同，故亦無法免除上述之2，3項 缺失。 再者，由於第二種習知裝置係以單一個光二極體同時 照射二個光電晶體’故爲防止因光二極體之光同時照射到 該二光電晶體所致之訊號相差不明顯，必須限制開孔間之 距離，則光柵輪表面周圍所能容納之開孔數目即無法太 ‘紙張尺度適用中國國家橾準（CNS ) Α4規格（210Χ297公釐） -----^-----装------1Τ------^ (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作杜印¾ 305971 A7 B7 經濟部中央標準局員工消費合作社印製 五、發明説明（3 ) 多，而如熟悉本技藝之人士所了解，光栅輪所具之開孔數 愈多，則解析度愈高，如此，則第二種習知裝置之解析度 即受到了限制。 本案之主要目的在提供一種具位移偵測裝置之游標控 制裝置，俾降低生產成本。 本案之另一目的在提供一種具位移偵測裝置之游標控 制裝置，俾降低組裝工時。 本案之再一目的在提供一種具位移偵測裝置之游標控 制裝置，俾避免因相位差不明顯所致之位移偵測之錯誤。 本案提供一種游標控制裝置偵測位移之方法，其包 括：接收一光源，並依每次所接收之不同光通量値來產生 一串不同電壓値訊號；依該串不同電壓値訊號中每一個電 壓値訊號之出現順序來偵測出游標之移動位移。 本案亦提供一種實施該方法之裝置，包括：一殻體； 一滾球設於該殻體內，可使電腦螢幕上之游標因其轉動而 於特定方向移動；一發光元件設於該殼體內’以產生一光 源，可以光二極體爲之；一位移偵測裝置’設於該殼體 內，其可接收該光源而產生單一串不同電壓値訊號，藉由 該不同電壓値訊號之出現順序，即可判斷該滾球之移動位 移。其中該位移偵測裝置設有至少三個訊號產生媒介。 該位移偵測裝置包括：一感光裝置，設於該殼體內’ 其上設有該等訊號產生媒介；一特殊應用積體電路 (ASIC)，設於該殼體內，用以偵測該不同電壓訊之出現 順序，並依該不同電壓値訊號之出現順序控制該游標於電 本紙張尺度適用中國國家標準（CNS )八4規格（210X29*7公釐） -----—"-丨裝------訂-------線 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央橾準局員工消費合作社印製 305971 A7 B7 五、發明説明（4 腦螢幕上之移動位移。該特殊應用積體電路包括：一取樣 電路，將該串不同電壓値之訊號轉成一串時脈；一比較電 路，將該串不同電壓値之訊號轉爲數位訊號；一控制器， 依該數位訊號之出現順序及受該時脈之觸發而得到至少三 種數位狀態，俾可依該數位狀態控制該滾向及距 離。 另一種位移偵測裝置包括：一感光虞置，其上設有該 等訊號產生媒介；一微處理機晶片 (Microprocessor)，設於該殼體內，用以偵測該不同 電壓訊號之出現順序，並依該不同電壓値訊號之出現順序 來控制該游標於電腦螢幕上之移動方向及距離。其中該微 處理機晶片係以韌體來控制該游標於電腦螢幕上之移動方 向及距離。 其中該感光裝置包括：一光柵輪，設於該殼體內，其 表面設有該等訊號產生媒介；一感光元件，設於該殻體 內，其依該媒介對該光源之接收量而產生該一串不同電壓 値訊號，可以光電晶體爲之。 當然，該等媒介係設於該光柵輪表面之開孔，且該等 開孔之有效透光面積不同。 當然，本案更包括一光罩片設於該光柵輪之表面，俾 防止該光源之散射，以得更佳之偵測效果。 本案得藉下列圖式及詳細說明，俾得一深入了解。 第一圖：係習知裝置所產生之二個具相位差之等頻寬 脈波示意圖。 本紙張尺度速用中國國家梯準（CNS ) A4規格（21ΌΧ297公釐） 裝------訂-------線 { (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局貞工消費合作社印製 A7 B7 五、發明説明（5 ) 第二圖··係本案裝置之一較佳實施例示意圖》 第三圖：係本案光柵輪表面開孔之一較佳實施例示意 圖。 第四圖：係本案ASIC之一較佳實施例示意圖》 第五圖：係本案單一串不同電壓値訊號與ASIC相關 脈波示意圖。 第六圖··係本案之不同電壓値訊號經由ASIC處理所 得之相對數位狀態表。 請參閱第二圖，其爲本案之一較佳實施例示意圖，其 包括：一殻體20 ; —滾球21 ;於Χ,Υ軸各具有：一發光 元件22(此處以光二極體爲之）’一位移偵測裝置23，該 位移偵測裝置23包括感光裝置231與ASIC 232’感光裝 置231又包括光柵輪2311與光感元件2312(此處以光電 晶體爲之）；其中，光柵輪2311之表面設有做爲訊號產生 媒介之開孔 23111，23112,23113，開孔 23111,23112,23113之有效透 光面積均不相同（如圖三所示）；另外’本案於X、γ軸之 光柵輪各包括有一光罩片（mask) 24設置於光柵輪2311 之表面，俾防止光源之散射，而能達到更佳之效果。 本案用以偵測位移之方法如下：當光二極體2 2所產生 之光源射至轉動中之光柵輪2311之表面時’由於開孔 23111、23112、23113之有效透光面積不同’使得光 電晶體2 3 1 2依該開孔所接收之光量大小而產生了如圖五 之單一串不同電壓値A、B、C之訊號，ASIC 232偵測該 等不同電壓之訊號A、B、C之出現順序’俾據以判定滾球 本紙張尺度適用中國國家標準（CNS )八4規格（210Χ297公釐） ^------ΐτ------^ ί (請先閲讀背面之注意事項再填寫本頁) 經濟部中央橾準局員工消費合作社印製 A7 ---------B7 五、發明説明（6 ) 21之左、右、上、下移動位移，並藉以控制游標於電腦螢 幕上之移動位移。 請再參閱圖四、五，其爲本案ASIC 232之一實施例 示意圖及相關波形圖，ASIC 232又包括取樣電路 2321、比較電路2322及控制器2323，參考電壓源Va、 Vb、Vc，其 + Va<A，A<Vb<B，B<Vc<C ;當比較電路 2 3 2 2接收到光電晶體2 3 1 2所感應之電壓訊號，取樣電路 2321將該電壓訊號以微分取樣之方式形成以訊號A、B、 C之波峰爲前緣之不同脈寬之方波訊號clock，以做爲控 制器2323之時脈，由於clock之前緣係於電壓訊號A、 B、C之波峰觸發，如此可使得控制器2 3 2 3確能取得電壓 訊號A、B、C之波峰値，避免因未能於波峰取樣所致之移 動方向之偵測錯誤。 所以，當電壓値Λ、B、C伏特之訊號進入時，經由比 較電路2322之比較結果可得到圖六之數位狀態：Α伏特訊 號經由比較電路2322將產生（1，0,0)狀態，B伏特訊號 將產生（1,1,0)狀態，而C伏特訊號將產生（1,1，1)狀 態；將這些狀態送至之控制器2 3 2 3，便可偵測出滾球2 1 之移動方向及移動距離；如果控制器2323於接收到A伏特 訊號之狀態後，緊接著是接收到B伏特訊號之狀態’則表 示滾球已向右（或上）移動一單位（DPI，dot per i n c h )，如果A伏特狀態後緊接著是C伏特狀態’則表示 已向左移動一單位（或下）。 本紙張尺度適用中國國家揉準（CNS ) A4规格（210X297公釐） --------— ^-----、玎------1^ (請先閱讀背面之注意事項再填寫本頁) S05971 五、發明説明（7 ) 此外，在實際的使用狀況中，可能會產生開孔面積尙 未完全穿過光二極體之光線照射範圍（尙未完全透光），使 用者即已改變滾球之移動方向，使得光柵輪之開孔無法感 應到完整的Α或Β或C電壓訊號，如此將產生一個未定位 元，使得控制器2323將於使用者改變位移方向瞬間產生 一個錯誤的位移（Jitter) ’爲了避免此種可能產生之狀 況，控制器2 3 2 3可以軟體控制之方式，於每次接收到變 更方向之第一位元時，會自動放棄該位元，來防止因開孔 透光不完整所致之位移偵測錯誤。 値得注意的是，由於本案主要是以產生單一串不同電 壓値之訊號做爲偵測移動方向及移動距離之手段，所以在 光柵輪開孔之形狀、尺寸可以有許多種之變化，例如方 形、圓形、不規則形……等等，只要能達到開孔面積之變 化即可。 至於如何利用該串不同電壓値訊號來偵測位移之設 計，凡熟悉本技藝之人士於閱畢本案說明內容之後，應可 了解其電路之各種設計方式，例如以微處理機晶片，配合 韌體爲之方式亦可，故此處僅舉圖四之電路爲該位移偵測 裝置之實施例，而不再贅述其餘可能採用之設計方式。 經濟部中央標準局員工消費合作社印裝 (請先閲讀背面之注意事項再填寫本頁) 綜上所述，本案裝置與習知裝置相較下之優點如下： 1 ·使用單一串不同電壓値訊號爲判別方向依據，而不需 二個具相位差之脈波訊號，故而X軸，Y軸各只需一個光二 極體及光電晶體，節省了材料成本及組裝工時。 本紙張尺度適用中國國家揉準（CNS ) A4洗格（210X297公釐） A7 B7 五、發明説明（8 ) 2 ·不以二脈波相位差爲辨識手段，故而不會產生因相位 差不明顯所致之辨識不明確之缺失（如前述習之裝置之第 2、3項缺失）。 3 ·本案係以開孔面積做爲調整電壓値之依據，故可以增 加開孔長度，縮短開孔寬度，在不影響面積値之狀況下， 來增加光柵輪表面開孔之數目，以增加解析度》 本案得由熟悉本技藝之人士任施匠思而爲諸般修飾， 然皆不脫如附申請專利範圍所欲保護者。 ----------1^------1T------^ (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局貝工消费合作社印製 本紙張又度適用中國國家橾準（CNS ) A4规格（210X297公釐）A7 B7 305971 V. Description of the invention ((Please read the precautions on the back before filling in this page) This case is a cursor control device '^ Moving method Cursor control device (such as mouse, trackball, etc.) The rotation of the roller ball controls the moving direction and distance of the cursor on the computer screen; in the cursor control device, the detection of the displacement of the roller ball is generally detected by the setting of the grating wheel in the X, γ direction. When the axis moves, it is still necessary to detect the movement of the ball in the left and right direction of the X axis, and the movement state of the γ axis in the up and down direction, in order to correctly control the displacement of the screen cursor. There are two types of conventional devices for displacement detection in the downward direction. The first type of conventional device printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs is to place two photo diodes and two photoelectric crystals in the X-axis direction ( photo transist 〇r), an X grating wheel is provided between the two photodiodes and the two photoelectric crystals, and the surface circumference of the X grating wheel is provided with a plurality of openings of the same size to receive light from the two photodiodes During irradiation Generate the effect of light transmission and shading. The two photoelectric crystals receive the light transmission and shading effect, and then are processed by an integral circuit to generate two series of pulse signals with equal phase width and phase difference (as shown in Figure 1). The two-phase difference of equal pulse width pulse signal will produce periodic (1,1) — (0,1)-(0,0)-(1,0)-(1,1)-… state 'to ( 1, 1) as an example, if a state (〇, 1) under the (1, 1) state indicates displacement to the right, if a state under the (1, " state is (1, 〇), it indicates Displacement to the left; of course, the detection method in the Y direction is the same as in the X direction. The lack of the first conventional device is as follows = This paper standard uses the Chinese National Standard (CNS) A4 specification (210X297 mm) 305371 A7 B7 In terms of the photodiode and the two X-axis, P5. Description of the invention (2 1 · In order to generate two series of pulse signals with different phases on each of the X and γ-axes, two photodiodes and two on the X and γ-axes must be provided. The two photoelectric crystals not only increase the material cost, but also increase the man-hours required for production and assembly. 2 · In order to accurately produce the best phase difference, the photodiode and the grating The relative position between the openings of the wheel and the photoelectric crystal must be accurately aligned to adjust the sensitivity angle, which will increase the trouble of the production process. 3. The phase difference between the two pulse waves is susceptible to the distance between the openings on the grating wheel Affected, the signal phase difference is not obvious, so it is impossible to clearly distinguish the left, right, up and down directions; in addition, if it is interfered by the outside world (such as light or the voltage of the RS232 port is unstable), it will also make the optical diode and The photoelectric crystal produces ripples, thus generating a series of pulse signals with invalid pulse width. The second conventional device has the same detection method as the first conventional device, both of which generate two strings of the same pulse width with phase difference The pulse wave is a means to identify the direction. The only difference is that the first conventional device is to separate the two optical crystals on the X and Y axes, and the second conventional device is a photodiode. Irradiate the two photoelectric crystals packed together, the same is true for the Y axis. This packaging will reduce the material cost of the two photodiodes and the packaging cost of the two photoelectric crystals, but because of the direction identification method The same as the first conventional apparatus, hence unable to relieve the above-2,3 item is missing. Furthermore, since the second conventional device uses a single photodiode to simultaneously illuminate two photoelectric crystals', in order to prevent the signal difference caused by the light of the photodiode illuminating the two photoelectric crystals at the same time, the difference must be limited The distance between the openings, the number of openings that can be accommodated around the surface of the grating wheel cannot be too large. The paper scale is applicable to the Chinese National Standard (CNS) Α4 specification (210Χ297 mm) ----- ^ ----- Outfit ------ 1Τ ------ ^ (Please read the notes on the back before filling out this page) Employee Consumer Cooperation of the Central Bureau of Standards of the Ministry of Economic Affairs Duinh 305971 A7 B7 Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy Printing 5. Description of the invention (3), and as the person familiar with the art understands, the more openings the grating wheel has, the higher the resolution. So, the resolution of the second conventional device That is restricted. The main purpose of this case is to provide a cursor control device with a displacement detection device to reduce production costs. Another object of this case is to provide a cursor control device with a displacement detection device to reduce assembly man-hours. A further object of this case is to provide a cursor control device with a displacement detection device, so as to avoid errors in displacement detection due to unclear phase differences. This case provides a method for a cursor control device to detect displacement, which includes: receiving a light source, and generating a series of different voltage value signals according to the different luminous flux values received each time; according to the series of different voltage value signals, each voltage value The order in which the signals appear to detect the movement of the cursor. The case also provides a device for implementing the method, including: a casing; a roller ball is arranged in the casing, which can move the cursor on the computer screen in a specific direction due to its rotation; a light-emitting element is arranged in the casing To generate a light source, a photodiode can be used; a displacement detection device 'is provided in the housing, which can receive the light source and generate a single string of different voltage value signals, by the order of appearance of the different voltage value signals, namely The movement and displacement of the ball can be judged. The displacement detection device is provided with at least three signal generating media. The displacement detection device includes: a photosensitive device, which is provided in the housing, on which the signal generating media are provided; and an application specific integrated circuit (ASIC), which is provided in the housing and used to detect the different voltages The order of appearance of the signal, and according to the order of appearance of the different voltage value signals, the cursor is applied to the paper standard of the Chinese standard (CNS) 84 specifications (210X29 * 7mm) -----— "-丨Install ------ order ------- line (please read the precautions on the back before filling this page) 305971 A7 B7 printed by the Employee Consumer Cooperative of the Central Bureau of Economics of the Ministry of Economy V. Description of invention (4 brain The movement and displacement on the screen. The special application integrated circuit includes: a sampling circuit that converts the signal of the string of different voltage values into a string of clocks; a comparison circuit that converts the signal of the string of different voltage values into digital signals; A controller obtains at least three digital states according to the order of occurrence of the digital signal and triggered by the clock, so that the roll direction and distance can be controlled according to the digital state. Another type of displacement detection device includes: a photosensitive sensor , With such signal products Media; a microprocessor chip (Microprocessor), is set in the housing, used to detect the order of appearance of the different voltage signals, and according to the order of appearance of the different voltage value signals to control the direction of the cursor on the computer screen And the distance. The microprocessor chip uses firmware to control the direction and distance of the cursor on the computer screen. The photosensitive device includes: a grating wheel, which is set in the housing, and the surface is provided with these signals Generating medium; a photosensitive element, located in the housing, which generates the series of signals of different voltage values according to the amount of the medium receiving the light source, which can be a photoelectric crystal. Of course, these mediums are set on the grating wheel Openings on the surface, and the effective light-transmitting areas of the openings are different. Of course, this case further includes a mask sheet placed on the surface of the grating wheel to prevent scattering of the light source for better detection effect. The following diagrams and detailed descriptions can be used to get an in-depth understanding. The first picture is a schematic diagram of two equal-width pulse waves with phase difference generated by a conventional device. For speed, use the Chinese National Standard (CNS) A4 specification (21ΌΧ297mm) installed ------ order ------- line {(please read the precautions on the back before filling in this page) Ministry of Economic Affairs Printed by the Bureau of Standards, Zhengong Consumer Cooperative A7 B7 5. Description of the invention (5) The second picture is a schematic diagram of a preferred embodiment of the device in this case. The third picture is a preferred embodiment of the surface opening of the grating wheel in this case Schematic diagram. Fourth picture: Schematic diagram of one of the preferred embodiments of the ASIC in this case. ”Fifth picture: Schematic diagram of a single string of different voltage value signals related to the ASIC in this case. The sixth picture is the different voltage value signals of this case via the ASIC. Relative digital status table obtained by processing. Please refer to the second figure, which is a schematic diagram of a preferred embodiment of the case, which includes: a housing 20; a rolling ball 21; each having a light emitting element 22 on the X and Y axes (The photodiode is used here) 'A displacement detection device 23, which includes a photosensitive device 231 and an ASIC 232' The photosensitive device 231 also includes a grating wheel 2311 and a photosensitive element 2312 (here the photoelectric crystal is used as Of); Among them, the surface of the grating wheel 2311 is provided with The effective light transmission areas of the openings 23111, 23112, 23113, and openings 23111, 23112, 23113 for the signal generation medium are different (as shown in Figure 3); in addition, in this case, the grating wheels on the X and γ axes each include a A mask 24 is provided on the surface of the grating wheel 2311 to prevent the light source from scattering and achieve a better effect. The method used to detect displacement in this case is as follows: when the light source generated by the photodiode 22 hits the surface of the rotating grating wheel 2311, 'the effective light transmission area of the openings 23111, 23112, 23113 is different' so that the photoelectric crystal 2 3 1 2 According to the amount of light received by the opening, a single string of signals with different voltage values A, B, and C as shown in Fig. 5 is generated. ASIC 232 detects the appearance of the signals A, B, and C of these different voltages The order is based on the judgment that the paper size of the roller ball is applicable to the Chinese National Standard (CNS) 84 specifications (210Χ297 mm) ^ ------ lsτ ------ ^ ί (please read the notes on the back first (Fill in this page again) A7 --------- B7 printed by the Employee Consumer Cooperative of the Central Department of Economic Affairs of the Ministry of Economic Affairs 5. Description of the invention (6) 21 The left, right, up and down movement of 21 is used to control the cursor Movement displacement on the computer screen. Please refer to FIGS. 4 and 5 again, which are schematic diagrams and related waveform diagrams of an embodiment of the ASIC 232 in this case. The ASIC 232 further includes a sampling circuit 2321, a comparison circuit 2322, and a controller 2323, reference voltage sources Va, Vb, and Vc. Va < A, A < Vb < B, B < Vc <C; When the comparison circuit 2 3 2 2 receives the voltage signal induced by the photoelectric crystal 2 3 1 2, the sampling circuit 2321 forms the voltage signal by differential sampling The square wave signal clock of different pulse widths with the peaks of the signals A, B, and C as the front edge is used as the clock of the controller 2323, because the front edge of the clock is triggered by the peaks of the voltage signals A, B, and C, so The controller 2 3 2 3 can indeed obtain the peak values of the voltage signals A, B, and C, and avoid the detection error of the moving direction caused by the failure of the peak sampling. Therefore, when the signals of the voltage values Λ, B, and C volts are entered, the digital state of FIG. 6 can be obtained by the comparison result of the comparison circuit 2322: the Alpha volt signal will generate the (1, 0, 0) state, B The Volt signal will generate the (1,1,0) state, and the C Volt signal will generate the (1,1,1) state; send these states to the controller 2 3 2 3, you can detect the rolling ball 2 1 The moving direction and moving distance; if the controller 2323 receives the A volt signal and then the B volt signal is received, it means that the ball has moved one unit (DPI, dot) to the right (or up) per inch), if the A volt state is followed by the C volt state ', it means that it has moved one unit (or down) to the left. The size of this paper is suitable for China National Standard (CNS) A4 (210X297mm) --------— ^ ----- 、 玎 ------ 1 ^ (please read the notes on the back first Please fill in this page for details) S05971 V. Description of the invention (7) In addition, in actual use, there may be a light irradiation range (the incomplete light is not completely transmitted) of the aperture area that does not completely pass through the photodiode. It has changed the direction of movement of the roller ball, so that the opening of the grating wheel cannot sense the complete A or B or C voltage signal, so an unlocated element will be generated, so that the controller 2323 will generate it instantly when the user changes the direction of displacement A wrong displacement (Jitter) 'In order to avoid this possible situation, the controller 2 3 2 3 can be controlled by software, and each time it receives the first bit of the changed direction, it will automatically give up the bit. To prevent displacement detection errors due to incomplete light transmission in the opening. It should be noted that since this case is mainly to generate a single string of signals with different voltage values as a means of detecting the moving direction and moving distance, the shape and size of the opening of the grating wheel can have many variations, such as square , Round, irregular shape, etc., as long as the opening area can be changed. As for the design of how to use the string of different voltage value signals to detect displacement, anyone who is familiar with this skill should understand the various design methods of the circuit after reading the description of this case, such as using a microprocessor chip with firmware This is also possible, so here only the circuit of FIG. 4 is taken as an embodiment of the displacement detection device, and the remaining possible design methods will not be described in detail. Printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling in this page). In summary, the advantages of the device in this case compared with the conventional device are as follows: 1 · Use a single string of different voltage value signals In order to judge the direction, no two pulse signals with phase difference are needed, so only one photodiode and photoelectric crystal are needed for each of the X-axis and Y-axis, which saves material cost and assembly man-hours. This paper scale is suitable for China National Standardization (CNS) A4 wash grid (210X297mm) A7 B7 5. Description of invention (8) 2 · The phase difference of the two pulses is not used as a means of identification, so it will not be produced because the phase difference is not obvious The lack of unclear identification (such as the lack of items 2 and 3 of the aforementioned device). 3. In this case, the opening area is used as the basis for adjusting the voltage value, so the length of the opening can be increased and the width of the opening can be shortened. Without affecting the area value, the number of openings on the surface of the grating wheel can be increased to increase the resolution. This case must be modified by any person familiar with this skill, Ren Shijiansi, but none of them are as protected as the scope of the patent application. ---------- 1 ^ ------ 1T ------ ^ (Please read the precautions on the back before filling out this page) Printed by Beigong Consumer Cooperative, Central Bureau of Standards, Ministry of Economic Affairs This paper is again suitable for China National Standard (CNS) A4 (210X297mm)