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TWI360645B - Ambient light sensor circuit and flat panel displa - Google Patents

Ambient light sensor circuit and flat panel displa Download PDF

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Publication number
TWI360645B
TWI360645B TW096145816A TW96145816A TWI360645B TW I360645 B TWI360645 B TW I360645B TW 096145816 A TW096145816 A TW 096145816A TW 96145816 A TW96145816 A TW 96145816A TW I360645 B TWI360645 B TW I360645B
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TW
Taiwan
Prior art keywords
ambient light
electrically connected
switch
power source
transistor
Prior art date
Application number
TW096145816A
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English (en)
Other versions
TW200827685A (en
Inventor
Oh Kyong Kwon
Original Assignee
Iucf Hyu
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Publication date
Priority claimed from KR1020060135376A external-priority patent/KR100825411B1/ko
Priority claimed from KR1020070080754A external-priority patent/KR100892792B1/ko
Application filed by Iucf Hyu filed Critical Iucf Hyu
Publication of TW200827685A publication Critical patent/TW200827685A/zh
Application granted granted Critical
Publication of TWI360645B publication Critical patent/TWI360645B/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/28—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source
    • G01J1/30—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors
    • G01J1/32—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors adapted for automatic variation of the measured or reference value
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/4204—Photometry, e.g. photographic exposure meter using electric radiation detectors with determination of ambient light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • G01J1/46—Electric circuits using a capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G09G2300/0408—Integration of the drivers onto the display substrate
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0219—Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Power Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
  • Liquid Crystal Display Device Control (AREA)

Description

九、發明說明： 【發明所屬之技術領域】 /本發明_於—種環境光_電路及平面麵 係=:種峨_鐵_輪价知能夠= 控“眷綠的魏光制電路及其平面贿示裝置。 【先前技術】 通常’平面型顯示裝置包含有機電致發絲示α、液 不裝置、電_示裝料及顧發軸示裝置。平㈣顯干2 _婦__，⑽糊了傳統着 ^官（Cathc>deRayTube，CRT)顯示裝置。有機電致顯示裝 且與液晶齡Μ㈣雜小財料地妨製造 能夠使驗長邮，並_歧_作便= 平面型顯示裝置，.#機電軸示裝置或者液晶顯示袭置 可以透過使用者的操作手動控制其亮度。然而，平面型顯示襄置 總是被設料贿定亮賴轉幕，科核環境的亮度。例如， 使用者在環境亮度不高的房間_覺螢幕亮度相對較高，但在陽 光下則感覺錄亮度相對較暗，因此㈣存錢見性（vis 問題。 …此外H上文所述’傳統平面型顯示裝置的亮度係設定為怪 疋水平田頌不裝置長時間使用於相對較暗的場合時，由於其亮 度不萬要太〶目此這晨存在功率效率增加的問題。 之 二亡产:製造環境光感測電路用於感測傳统平㈣顯示裝置 平二=:感測器、基板以及電路應當形成在區別於形成有 千面如破之主基板之單縣板上，並且連接 _ 加了平面型顯示裝置的尺寸、厚度以及功率消挺。因此增 再者’由於採樣週期中的光茂漏電流，傳輸平面型顯 之環境光感測電路之輪ώ兩、、& 、， '、’'、 不能夠精確地採樣環亚㈣環境光感測電路 =卜’由於環境溫度增加導致的溫度$漏電流，傳 顯不襄置之環境光_電路之輸出電流發生變化 t 感測電路純精確地_環狀。 、，口此環節光 【發明内容】 測電===題’本發明的主要目的在於提供—種環境光感 、 γ、有此i路的平面型顯示裝置’藉以透過感測環境亮度 制輸出電流’依照環境亮度自動控制平面型顯示裝置二 儿又，進而改善明亮環境與黑暗環境的能見性。 另外^本發_提供了 —種環境光感測電路及具有此電路的 、:顯讀置’其依照環境亮度自動控制功率雜，保持最佳 力卞’肖耗’轴關延紐攜式平面型顯钱置之壽命。 者’本㈣提供之—種環境光感測電路及具有此電路的平 面型，4置’透卿成環境光感測電路、環境光處理器、計時 I制-Ρ、料驅動n、掃描驅動器以及發光控制驅動器在有機電

Claims (1)

100年11月16日 十、申請專利範圍： 1· 一種環境光感測電路，包含有. -電晶體，係電性連接至—第一電源； -第-電谷7L件，係電性連接於該電晶體之控制電極與一 第一參考電源之間； Μ -第一電谷疋件’係電性連接於該第—電容藉與一第二 參考電源之間； — 一-第-光接收7L件，係電性連接於該第—參考電源和一第 三t考電源之間，並透過回應環境光導出電流進而控制該第— 電今兀件之輕合電壓以及該第二電容元件之充電/放電電壓； 第開關，電性連接至該電晶體，並依照該第一電容元 件之電壓使得該電晶體從該第一電源輸出電流；以及 一-第二開關，係電性連接於該第一光接收元件與該第一電 Μ件之間’並巾賴第—光接收元件之誠電流，進而防止 該第一電容元件之耦合電壓變化。 如申睛專概II第1項所述之環境光_電路，更包含一第三 開關，電性連接於該第—參考電源與該第二_之間，進: 左由该第二開關自該第—參考電源提供—第 第—電容元倾_二電容树。 如申請專利範圍第1項所述之環境光感測電路，更包含一第四 、’關係概連接於該電晶體之㈣電極無第—開關之間， 並使得該電晶體形成-二極體連接結構。
糸a &連接至鄕—顧，細躺帛-電容元件與該 :電合元件之_合電壓，使得該電日a日體自該第一電源並經由 該第-開關傳輸財電流至—輸出端。 環境光感測電路，更包含一第三 二電容元件，並增加該第一光接 如申請專利範圍第1項所述之環 電容元件，係電性_至該第二 收元件之反向偏置電容。 •如申請專利範圍第6項所述之環境光感測電路，更包含一第七 開關’係電性連接於該第二電容元件與該第三電容元件之間， 進而互相電性連接該第二電容元件與該第三電容元件。 8.如申請專利範圍第丨項所述之環境光感測電路，更包含： -第三_ ’係電性連接於該第—參考電源與該第二開關 門進而、.·呈由„亥第一開關自該第一參考電源提供一第一參考 電壓至該第_電容元件與該第二電容元件； 一第四_，係電性連接於該電晶體之測賴與該第一 開關之間’並使得該電晶體形成—二極體連接結構； 第五開關’係電性連接於該第一開關與該參考電源之 53 1360645 100年11月16日替換頁 間，進而經由該第-開關提供一參考電流至該電晶體，由此提 ' 供預定電壓至該電晶體之控制電極； V 一第六開關’係電性連接至該第—關，並回應該第_電 谷元件與該第一電谷元件之柄合電壓，使得該電晶體自該第一 電源並經由該第一開關傳輸預定電流至一輸出端； -第三電容元件’係斯生連接至該第二電容元件，並增加 該第一光接收元件之反向偏置電容；以及 一第七開關，係電性連接於該第二電容元件與該第三電容鲁 疋件之間’進而互相電性連接該第二電容元件與該第三電容元 件。 9,如申請專利範圍第8項所述之環境光感測電路，其中該第—光 接收元件係選自p-本質層_n (p士n)二極體、p_本質層·金屬 (p-i-m)二極體、p_n二極體以及光電耦合器任意一種，該第 -光接收元件之正極係電性連接至該第一參考電源，以及該第 一光接收元件之負極係電性連接至該第三參考電源。 鲁 10·如申請專利範圍第9項所述之環境光感測電路，其中自該第三 參考電源提供之第三參考係高於自該第—參考電源提供 之第一參考電壓。 如申請專利範圍第8項所述之環境光感測電路，其中該第一光 接收疋件係選自P-本質詹-n (p-i-n)二極體、p_本質層_金屬 (P+m)二極體、p_n二極體以及光電編合器任意一種，該第 54 1360645 • 100年11月16日替換頁 —光触元狀貞_紐連接至邮—— 一光接收元件之正極係電性連接至該第三參考電源。 :12.如申凊專利辜已圍第11項所述之環境光感測電路，其中自該第 : 三參考電源提供之第三參考電壓係低於自該第一參考電源提 供之第一參考電壓。 13. 如申請專利範圍第1項所述之環境統測電路，更包含一第二 光接收元件’該第二光接收元件係電性連接於該第接收: • 件與:第四參考電源之間，並包含-遮光層，進而由於環境光 被遮蔽而相應僅感測依照溫度增加之茂漏電流。 14. 如申請專利範圍第8項所述之環境光制電路，更包含一第二 光接收兀件，該第二光接收元件係電性連接於該第一光接收元 件與:第四參考電源之間，並包含一遮光層，進而由於環境光 被遮蔽而相應僅感測依照溫度增加之汽漏電流。 籲I5.如申睛專利範圍第i項所述之環境光感測電路，更包含： 一溫度感測器，係用於感測溫度； 一查詢表’係紐連接至該溫度躺H，並存儲對應該感 測溫度之環境光感測時間；以及 " 一控制器，係電性連接至該查詢表，並回麟查詢表輸出 之該％境光感測時間提供一第一控制訊號至該第一開關。 6’如申6f專利_第8項所述之環境光感測電路，更包含： • 一溫度感測器，係用於感測溫度； 55 1^60645 100年11月16日替換頁 » 一查詢表’係電性連接至該溫度感測器，並存儲對應該感 ·: V/ 測溫度之環境光感測時間；以及 一控制器’係電性連接至該查詢表，並回應該查詢表輸出 ： 之該環境光感測時間，分別提供一第一控制訊號、一第二控制 訊號、一第二控制訊號、一第四控制訊號、一第五控制訊號以 及一第六控制訊號至該第一開關、該第二開關與該第三開關、 該第四開關、該第五開關、該第六關以及該第七開關。 17·如申請專利麵第丨項所述之環境減測電路，更包含： φ 一第一開關電晶體，該第一開關電晶體之第一電極與第二 f極係電性連接於該第一電容元件與該第二電容元件之間，並 且該控制電極係電性連接至一第二負控制訊號；以及 一第二開關電晶體，該第二開關電晶體之第—電極與第二 電極係電性連接至該電晶體，並且該控制電極係電性連接至一 第三負控制訊號。 .如申明專利範圍第8項所述之環境光感測電路，更包含： φ 一第-開關電晶體’該第―開關電晶體之第—電極與第二 電極係電性連接於該第-電容元件與該第二電容元件之間，並 且該控制電極係電性連接至一第二負控制訊號；以及 -第二開關電晶體，該第二開關電晶體之第一電極與第二 電極係電性連接至該電晶體，並且該控制電極係電性連接至一 第三負控制訊號。 56 19·如申請專利範㈣S項所述之環境域測電^ 關與該第七開關係由兩個串聯連接電晶體構成。 ， 20. —種平面型顯示裝置，係包含有： 一環境光感測電路’其中該環境光感測電路包含： 體’係電性連接至-第-電源；一第一電容 = 於該電晶體與-第-參考電源之門·⑨φ:係紐連接 Μ之間，n容元件，係電性 連=於=第-電源、該第-電容元件與—第二參考電源之間； 光接收元件，简性連接於該第—參考電源和一第三參 源之間’並透過回應環境光導出電流進而控制該第一電容 元件之搞合電壓以及該第二電容元件之充電/放電電壓·一第 =關’電性連接至該電晶體，並依照該第一電容元件之輕合 霞得該電晶體從該第-電源輸出電流;以及-第二開關， 系電性連接於該第-光接收元件與該第一電容元件之間，並中 斷該第一秘罐伽m谢電容元件之 輕合電壓變化； 一環境光控键理H，做該魏紐測t路接收一類比 輪出訊號作騎人職，並計算㈣魏光錢触該當前環 境光為數位值； 梢控勤’係接收該環境光控制處理n之輸出訊號作 為輸入訊號，麟應該讀環境光輸出―㈣訊號；以及 有機電致Φ板，雜傾計時控㈣提供之對應該當前 57 1360645 m 〗00年11月16日替換頁 環境光之該控制訊號，並對應該當前環境光&具有一亮度之~~； 光線。 ^ 儿如申請專利範圍第20項所述之平面型顯示裝置，其中該計時 控制器包含： _ -查询表’係存儲對應該當前環境亮度之資料；以及 π度選擇器’係比較該環境光控制處理器輸入之資料與 存儲於該查詢表中之資料’並對應該當前環境亮度選擇一資料 控制訊號’以及輸出該資料控制訊號至一資料驅動器。 · 22. 如申明專利範圍第2〇項所述之平面型顯示裝置，更包含一資 料驅動器’係接收該計時控制器之輸出訊號作為輸入訊號，並 對應該當前環境亮度輸出一資料訊號，以及提供該資料訊號至 6 亥有機電致面板。 . 23. 如申請專利範圍第2〇項所述之平面型顯示裝置，更包含一發 光控制驅動器，係接收該計時控制器之輸出訊號作為輸入訊 號’並輸出一發光控制訊號’以及提供該發光控制訊號至該有 ® 機電致面板。 24. 如申請專利範圍第2〇項所述之平面型顯示裝置，更包含一功 率控制器，係接收該計時控制器之輸出訊號作為輸入訊號’並 對應該當前環境亮度輸出一功率電壓，以及提供該功率電壓至 該有機電致面板。 25. —種平面型顯示裝置，係包含： 58 1360645 , _年11月16日替換百 核境光_電路’其巾輯境光制、 體，係電性連接至—第一電源；一第一電容元件，係電性^ 於該電晶體與-第-參考電源之間；一第二電容元件係電性 連接於該第-電源、該第—電容元件與—第二參 一第一光接收元件，_性連接於該第—參考電源和—第= 考電源之間，並透過回應環境光導出電流進而控制該第一電容
元件之輕合雜以及該第二電容元件之充電/放電電壓；一第 -開關’電性連接至該電晶體，並依照該第一電容元件之輕人 電錢得該電晶體從該第—電源輸出電流；以及-第二開關°， 係電性連接於該第-光接收元件與該第一電容元件之間，並中 斷該第-光接收元件之茂漏電流，進而防止該第一電容元件之 耦合電壓變化； 核境光控做理n，雜該環境光_ 接收一類比 輸出訊號作騎人峨’並計算#前環境光以及輸出該當前環 境光為數位值； -梢控爿n，係接收該環境光控制處理器之輸出訊號作 為輸入訊號’並對應該當前環境光輸出—控制訊號； 反相器’係接收該計時控制器之輸出訊號作為輸入訊 號’並對應該當前環境光升高該神電壓至_位準，以及輸出 該升高功率電壓； 一为光元件，係由該反相器提供之電壓打開/關閉；以及 59 1360645 100年11月16日替換頁 一液晶顯示面板，係透過該背光元件顯示螢幕。 <
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