201237713 六、發明說明： 【發明所屬之技術領域】 本發明係有關-種光感測《，特別是指—種兼具可見光制及距離 感測功能之光感測裝置。 【先前技術】 在光學應«統中，常常使關如可見光感測器、紅外線感測器、紫 外線感測器、距離感測器以及光纖雜號傳遞之感應器等的光感測裝置， 習知光感測n即制為受光晶林身械光上的關，而導致可見光與不 可見光皆可接收’造成感測結果的錯誤，而此即為f知光感測器的缺點。 而為了讓光感測n的響應光譜達到只能接收不可見光、或只能接收可見光 的目‘ ’不同的製造商係各以不同的方式來讓自薇的光感測器達成該目標。 習知用於偵測環境光之環境光_器的製作，其-為使用石夕(Si)基材來 製作環境光侧n ’其伽躲與魏放大器與健處理1(：同時整合。不 過使用魏材’除了有_位置上的限制外，其尚會因吸收難以消除之紅 外線波&的光’而使其彳貞猶果發生偏差。為解決此—問題，即有人提出 使用特殊的過渡器來渡去紅外光，或使用一雙谓測器分別吸收的不同波 -& 1進行L號處理，藉以消除被吸收之紅外線波段的光。但縱使加上了 ' 4些解決方案，其反應頻譜和人眼的反應頻譜間仍具有差異，無法達成與 人眼反應相_觸。另—種方法’係將環境光侧験顯示器面板直接 t口，亦即於藉由非晶矽薄膜電晶體製程製作液晶面板時，同時製作環境 光偵測器’或在有機發光二極體面板中，同時用有機二極體的材料來製作 光債測ϋ。但此種方法需要直接更改面板岐計，致使需變更整個面 201237713 板的製程目刖僅有制於手寫面板的裝置，尚無法應關環境光的侧； 另外’光L施都是針料尬做改良，或是將多個光感測器設 计於產品上而無法使產品尺寸薄型化，且成本高等缺失。 有鐘於此，本發明遂針對上述先前技術之缺失，提出一種兼具可見光 及距離感測之光感測裝置，以有效克服上述之該等問題。 【發明内容】 本發明之主要目的在提供—種兼具可就及距離感測之光感測裝置， 其月匕達到可見光感測與距離感測的二合—光感測功能，且電路結構簡單、 成本低’對於電子產品越趨輕巧薄型化及平價趨勢之需求中，極具有市場 競爭優勢。 為達上述之目的，本發明提供一種兼具可見光及距離感測之光感測裝 置’包括-濾波器，係、只允許人眼可見光通過，以產生__可見光信號；一 第光感測器，其外表包覆滤波器，第一光感測器根據可見光信號強度產 生第光電流，-第二光感測器，係接收環境光信號，並根據環境光信 號強度產生-第二光電流；—第—光電流讀出電路，係根據第—光電流產 生一第—錢1-信制雜舰與可絲錢強度测，與其他舰 光無關；—第二光電流讀出電路，係根據第二光電流產生-第二信號；及 七號相減電路，係耗接至第一光電流讀出電路及第二光電流讀出電路， \相減電路係將第二信號減掉第—信號以產生-輸出信號，輸出信號的 電性特徵與-紅外線信號強度相關，且與可見光信號無關。 底下藉由具體實施例詳加說明，當更容易瞭解本發明之目的、技術内 容、特點及其所達成之功效。 201237713 【實施方式】 如第1圖所示，為本發明之第一實施例示意圖，光感測裝置包括一濾 波器10、一第一光感測器12、一第二光感測器14、一第一光電流讀出電路 16、一第一光電流s賣出電路18及—信號相減電路2〇。第一光感測器12及 第二光感測器Η分別連接第一光電流讀出電路16及一第二光電流讀出電 路18，且#號相減電路20輕接至第一光電流讀出電路π及第二光電流讀 出電路18。其中，第一光感測器12之外表包覆濾波器1〇，故濾波器1〇為 僅讓人眼可見光通過以產生一可見光信號。由於第一光感測器12被包覆於 濾波器10内，因此只接收可見光信號，並根據可見光信號的強度產生一第 一光電流，第一光電流讀出電路16係根據第一光電流產生數位或類比之一 第一信號，此第一信號的電性特徵僅與可見光信號強度相關，換言之，與 其他頻段光無關’因此可直接輸出第一信號，作為可見光感測功能使用。 第一光感測器12感測光的同時，第二光感測器μ係接收環境中所有光信 號之一環境光信號，其包含有可見光信號、紫外線信號、紅外線信號或其 他頻段之光信號，並根據環境光信號強度產生一第二光電流，第二光電流 讀出電路18係根據第二光電流產生數位或類比之一第二信號，此第二信號 之電性特徵僅與可見光信號與紅外線信號侧。接續，由域相減電路2〇 將第二信號中的可見光信號減掉第—信號的可見光信號，以產生一輸出信 號，此輸出信號的電性特徵僅與紅外線信號強度相關，在實際應用上，紅 外線感測可作為各種用途的功能’於本發明巾，最理想目的是輸出信號作 為距離感測功能使用。 請-併參閱搭配第i圖與第2圖，第2圖為本發明之第二實施例示意 201237713 圖，再此僅制與第-實補之減處，財在贅述裝置之第一 光感測器12為-光轉電元件，如光電二極體以，其外表包覆有遽波器1〇, 請同時搭轉3圖，於有光線之條件下，境光λ行進域波器1()時，會 將環境光Λ巾所包含的料線㈣、紅外線錄或其他搬之光信號雜 掉，僅接收讓人眼可見光通過的可見光信號，故人眼可見光又，之可見光信 號’如光的波長為400-700⑽再行進至光電二極體叫，其主要係吸收可見 光子所產生的載子以轉換成第一光電流。 再回到第2圖’由第-光電流讀出電路10根據第__光電流產生數位或 類比之m此第-信制電性特徵僅與可見光信號強度相關，因 此可作為可見減測器使用’其可應用於各種產品的顯示裝置，如螢幕， 藉由可見光感測功能可用於調節顯示裝置的背光亮度與對比，使螢幕於日 照下仍可被閱讀，進而讓使用者有最佳的視覺感受，以降低眼睛的疲勞外， 更可節省顯示裝置的電力、雜’延長制壽命^第二光感測器14為一光轉 電元件’如光電二極體D2，其主要係做所有環狄λ光子所產生的載子 以轉換成第二光電流，如400-140〇nm，再由第二光電流讀出電路18根據第 一光電流產生數位或類比之一第二信號，此第二信號之電性特徵僅與可見 光仏戒與紅外線彳§號相關。彳§號相減電路20將第二信號中的可見光信號減 掉第一信號的可見光信號，以產生一輸出信號，此輸出信號的電性特徵僅 與紅外線信號強度相關’故可作為距離感測功能使用。 為能進一步說明，本發明提供了實際量測結果以供參考，請同時配合 第4圖，為本發明感測環境光之示意圖，標號A為濾波器1〇之濾波頻譜， 濾波器10僅允許約為400-650nm的可見光通過，其它波長之光穿透率接近 201237713 〇%。標號B為第一感測器12及第二感測器14對光之感應靈敏度。唯第_ 感測器12感測之光信號，由於經過濾波器10濾除其他頻段的波長，因此 可準確地只感測到可見光信號。如標號B所示，第二感測器14可感測 400-1400nm之光信號，其中包含有可見光、紅外光及紫外光，紫外光波長 約為300-370 nm,由於第二感測器14對於紫外光之穿透率與靈敏度接近於 〇故可省略紫外光之感側部分。利用信號相減電路2〇將第二感測器14所 轉換之第二信號減去第—感測器12所轉換之第—信號，所得之輸出信號其 電性特徵與紅外光域的強度侧，最佳應餘距離感測魏使用。若本 發月將可見域測與距離感測的二合—光感測功能應用於觸控手機產品 上’不僅可達成螢幕調整人眼_為舒適之亮度，又可讓使用者於通話時， 藉由距轉測舰軸鶴齡面之域應錄度，以免於通对誤觸操 作選項’對於觸控手機普極化應用，極具有市場競爭優勢；當然，本發明 不侷限應驗觸控手機’凡舉需顧到光感測功能之產品皆適用。 〜綜上所述，本發明能達到可見光感測與距離感測的二合一光感測功 電路、〜構簡單、成本低，對於電子產品越趨輕巧薄型化及平價趙勢 之需求中’極具有市場競爭優勢。 —唯=上所述者’僅為本發明之較佳實施例而已，並非用來限定本發明 =施之_。故即驗本發”請範騎述讀徵及精_為之均等變化 或修飾’均應包括於本發明之巾請專利範圍内。 【圖式簡單說明】 第1圖為本_之第-實施例示意圖。 第2圓為本發明之第二實施例示意圖。 201237713 第3圖本發明可接收可見光信號之光路徑示意圖。 第4圖為本發明感測環境光之示意圖。 【主要元件符號說明】 10濾波器 12第一光感測器 14第二光感測器 16第一光電流讀出電路 18第二光電流讀出電路 20信號相減電路201237713 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a light sensing device, and particularly relates to a light sensing device having both a visible light and a distance sensing function. [Prior Art] In the optical system, light sensing devices such as visible light sensors, infrared sensors, ultraviolet sensors, distance sensors, and optical fiber-like sensors are often used. Sensing n is made into the light of the light crystal body, and both visible light and invisible light can receive the error that causes the sensing result, and this is the shortcoming of the light sensor. In order to allow the response spectrum of the light sensing n to reach only the invisible light, or only the visible light, the different manufacturers have different ways to make the self-dimensional light sensor achieve the goal. Conventional production of ambient light for detecting ambient light, which is to use the Shi Xi (Si) substrate to make the ambient light side n 'the gamma hiding and the Wei amplifier and the health processing 1 (: simultaneous integration. In addition to the restrictions on the position of the Wei material, it will still cause deviations due to the absorption of the infra-red wave & light that is difficult to eliminate. To solve this problem, it is proposed to use a special The transitioner uses the infrared light, or uses a pair of predators to absorb the different waves - & 1 to process the L, in order to eliminate the absorbed infrared band of light. But even with the addition of 'four solutions, There is still a difference between the reaction spectrum and the response spectrum of the human eye, and it is impossible to achieve a reaction with the human eye. Another method is to directly expose the ambient light side display panel to the t port, that is, by using an amorphous germanium film. When the liquid crystal panel is fabricated by the transistor process, the ambient light detector is simultaneously fabricated or in the organic light emitting diode panel, and the material of the organic diode is used to make the optical debt test. However, this method needs to directly change the panel. In order to change the whole The process of the 201237713 board is only for the device of the handwriting panel, and it is not possible to adjust the side of the ambient light. In addition, the 'light L application is improved by the needle material, or multiple light sensors are designed. In the product, the product size cannot be made thinner, and the cost is high, etc. In view of the above-mentioned prior art, the present invention proposes a light sensing device that combines visible light and distance sensing to effectively overcome the above-mentioned problems. SUMMARY OF THE INVENTION The main object of the present invention is to provide a light sensing device capable of both distance sensing and distance sensing, which achieves a two-in-one light sensing function of visible light sensing and distance sensing. And the circuit structure is simple and the cost is low. In the demand for the lighter and thinner electronic products and the trend of parity, there is a market competitive advantage. To achieve the above purpose, the present invention provides a light sensation with both visible light and distance sensing. The measuring device 'includes a filter, which only allows the human eye to pass visible light to generate a visible light signal; a first light sensor, the outer surface of which covers the filter, the first light sensor is based on See the light signal intensity to generate the photocurrent, the second photo sensor receives the ambient light signal, and generates a second photocurrent according to the ambient light signal intensity; - the first photocurrent readout circuit is based on the first light The current generates a first-money 1-signal miscellaneous ship and the wire-strength strength test, and has nothing to do with other ship lights; the second photo-current readout circuit generates a second signal according to the second photocurrent; and the seventh phase The subtraction circuit is connected to the first photocurrent readout circuit and the second photocurrent readout circuit, and the subtraction circuit subtracts the first signal from the second signal to generate an output signal, and the electrical characteristics of the output signal are - Infrared signal strength is related and independent of visible light signal. The purpose, technical content, characteristics and effects achieved by the present invention are more easily understood by the detailed description of the specific embodiments. 201237713 [Embodiment] The light sensing device includes a filter 10, a first photo sensor 12, a second photo sensor 14, and a first photocurrent readout circuit. 16, a first photocurrent s selling Circuit 18 and a - signal subtracting circuit 2〇. The first photo sensor 12 and the second photo sensor are respectively connected to the first photocurrent readout circuit 16 and a second photocurrent readout circuit 18, and the ## subtraction circuit 20 is connected to the first photocurrent. The circuit π and the second photocurrent readout circuit 18 are read. Wherein, the first photo sensor 12 covers the filter 1 之外, so the filter 1 〇 is only visible to the visible light of the eye to generate a visible light signal. Since the first photo sensor 12 is encapsulated in the filter 10, only the visible light signal is received, and a first photocurrent is generated according to the intensity of the visible light signal. The first photocurrent readout circuit 16 is based on the first photocurrent. The first signal is generated in digital or analog form, and the electrical characteristic of the first signal is only related to the visible light signal intensity, in other words, independent of other frequency bands. Therefore, the first signal can be directly outputted and used as a visible light sensing function. While the first photo sensor 12 senses the light, the second photo sensor μ receives an ambient light signal of all the optical signals in the environment, and includes a visible light signal, an ultraviolet signal, an infrared signal or an optical signal of other frequency bands. And generating a second photocurrent according to the ambient light signal intensity. The second photocurrent readout circuit 18 generates a digit or analogy second signal according to the second photocurrent, and the electrical characteristic of the second signal is only related to the visible light signal. Infrared signal side. In the continuation, the visible light signal in the second signal is subtracted from the visible light signal in the second signal by the domain subtraction circuit 2 to generate an output signal, and the electrical characteristic of the output signal is only related to the intensity of the infrared signal, in practical applications. Infrared sensing can be used as a function of various purposes. In the invention, the most ideal purpose is to use the output signal as a distance sensing function. Please refer to the accompanying drawings i and 2, and Fig. 2 is a schematic diagram of the second embodiment of the present invention, which is shown in Fig. 201237713, and then only the subtraction of the first and the actual compensation, and the first light perception of the device The detector 12 is a light-converting element, such as a photodiode, and its outer surface is covered with a chopper 1〇, please take a 3 picture at the same time, under the condition of light, the ambient light λ traveling domain wave device 1 (), the ambient light (4), infrared recording or other moving light signals contained in the ambient light towel will be mixed, and only the visible light signal passing through the visible light of the human eye will be received, so that the human visible light and the visible light signal are as light. The wavelength is 400-700 (10) and then travels to the photodiode, which mainly absorbs the carriers generated by the photons to be converted into the first photocurrent. Returning to Fig. 2, the first-to-signal electrical characteristic is generated by the first photo-current reading circuit 10 according to the __photocurrent, which is only related to the visible light signal intensity, and thus can be used as a visible damper. Using 'display devices that can be applied to various products, such as screens, the visible light sensing function can be used to adjust the brightness and contrast of the backlight of the display device, so that the screen can still be read under the sun, so that the user has the best Visual perception, in order to reduce the fatigue of the eyes, can save power of the display device, miscellaneous 'extended life ^ The second photo sensor 14 is a light-transducing component such as photodiode D2, which is mainly used for all The carrier generated by the cyclod λ photon is converted into a second photocurrent, such as 400-140 〇 nm, and the second photocurrent sensing circuit 18 generates a digital or analog second signal according to the first photocurrent. The electrical characteristics of the second signal are only related to the visible light 与 ring and the infrared 彳 § §. The 彳§ subtraction circuit 20 subtracts the visible light signal of the first signal from the visible light signal of the first signal to generate an output signal, and the electrical characteristic of the output signal is only related to the intensity of the infrared signal, so that it can be used as distance sensing Function use. For further explanation, the present invention provides actual measurement results for reference. Please also refer to FIG. 4, which is a schematic diagram of sensing ambient light according to the present invention, and reference numeral A is a filter spectrum of the filter 1 ,, and the filter 10 only allows The visible light of about 400-650 nm passes, and the light transmittance of other wavelengths is close to 201237713 〇%. Reference numeral B is the sensitivity of the first sensor 12 and the second sensor 14 to light. Only the optical signal sensed by the _th sensor 12 can accurately sense only the visible light signal because the filter 10 filters out the wavelengths of other frequency bands. As indicated by reference numeral B, the second sensor 14 can sense an optical signal of 400-1400 nm, which includes visible light, infrared light and ultraviolet light, and the ultraviolet light has a wavelength of about 300-370 nm, due to the second sensor 14 The transmittance and sensitivity of the ultraviolet light are close to that of the ultraviolet light. The signal subtracted circuit 2 减 subtracts the second signal converted by the second sensor 14 from the first signal converted by the first sensor 12, and the obtained output signal has an electrical characteristic and an intensity side of the infrared light field. The best residual distance sensing is used by Wei. If this month, the two-in-one light-sensing function of the field measurement and distance sensing is applied to the touch mobile phone product, 'not only can the screen be adjusted to the human eye _ for comfortable brightness, but also for the user to talk, It should be recorded by the range of the crane-aged cranes, so as to avoid the mis-touch operation option. For the universal application of touch phones, it has a competitive advantage in the market; of course, the invention does not limit the touch mobile phone. 'All products that need to take into account the light sensing function are applicable. ~ In summary, the present invention can achieve a two-in-one light-sensing dynamometer circuit for visible light sensing and distance sensing, and has a simple structure and low cost, and the demand for electronic products becomes lighter and thinner and cheaper. Very competitive in the market. The present invention is merely a preferred embodiment of the invention and is not intended to limit the invention. Therefore, it is the scope of the patent application of the present invention to be included in the scope of the patent application of the present invention. The second circle is a schematic diagram of the second embodiment of the present invention. 201237713 Figure 3 is a schematic diagram of the light path of the present invention for receiving visible light signals. Figure 4 is a schematic diagram of sensing ambient light according to the present invention. 10 filter 12 first photo sensor 14 second photo sensor 16 first photo current readout circuit 18 second photocurrent readout circuit 20 signal subtraction circuit