1378290 - 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種電子裝置’且特別是有關於可自動調 整亮度的電子裝置。 j 【先前技術】 目前，具有發光模組或照明模組的電子裝置已被人們廣泛 地使用，以液晶顯示器（Liquid Crystal Display ; LCD)為例，其 秦具有高畫質、體積小、重量輕、低驅動電壓、與低消耗功率等 優點’因此被廣泛應用於個人數位助理（pers〇nal Digital Assistant ; PDA)、行動電話、攝錄放影機、筆記型電腦、桌上 型顯示器、車用顯示器及電視等電子產品。 一般液晶顯示器主要係由液晶顯示面板和背光模組所組 成’背光模組係用以提供背光源至液晶顯示面板，以顯示影 像。已知現有液晶顯示器可設有光感測器於其内部或外部，以 感測環境亮度，並可根據光感測器的感測結果來對應調整背光 Φ 模組的背光亮度’以達到節能的功效。 然而’上述可感測環境亮度的液晶顯示器或電子裝置需額 外增設光感測器，因而增加其成本。再者，當光感測器設置於 電子裝置的外部時，電子裝置的殼體需增設一開孔來安裝光感 測器，因而亦容易增加成本，且需改變其外觀設計。 【發明内容】 因此本發明之一方面係在於提供一種可自動調整亮度的 電子裝置’藉以利用發光二極體來顯示其工作狀態，並檢測環 5 1378290 境光強度，因而可避免設置額外的光感測元件，而節省成本。 根據本發明之實施例，本發明之可自動調整亮度的電子裝 置包含發光模組、控制單元及至少一發光二極體❶控制單元電 性連接於發光模組，並控制發光模組的發光亮度。發光二極體 ‘電性連接於控制單元’其中發光二極體具有顯示模式和檢測模 - 式。當發光二極體為顯示模式時，發光二極體係用以顯示電子 裝置的工作狀態。當發光二極體為檢測模式時，發光二極體係 用以檢測環境光強度，並傳送檢測信號至控制單元控制單元 根據檢測信號來調整發光模組的發光亮度。 又，根據本發明之實施例，上述電子裝置為液晶顯示裝 置，且發光模組為背光模組，其相對於該液晶顯示面板設置。 又本發明之可自動調整亮度的電子裝置包含顯示模組、 控制單元及至發光二極體。控制單元電性連接於顯示模 組’並控制顯示模組的顯示亮度。發光二極體電性連接於控制 單元，其中發光二極體具有顯示模式和檢測模式。當發光二極 體為顯示模式時，發光二極體係用以顯示電子裝置的工作狀 • •態。當發光二極體為檢測模式時，發光二極體係用以檢測環境 光強度，並傳送檢測信號至控制單&，控制單元根據檢測信號 來調整顯示模組的顯示亮度。 又’根據本發明之實施例，上述電子裝置為顯示裝置，且 顯示模組為顯示面板。 因此’本發明之可自動調整亮度的電子裝置可利用發光二 極體來顯不其工作狀態，並檢測環境光強度，以省略額外的光 感測元件，因而可節省成本。 6 1378290 ， 【實施方式】 為讓本發明之上述和其他目的、特徵、優點與實施例能更 明顯易懂’本說明書將特舉出一系列實施例來加以說明。但值 得注意的是’此些實施例只是用以說明本發明之實施方式，而 ^ 非用以限定本發明。 請參照圖1，其繪示依照本發明之一實施例之電子裝置的 方塊示意圖。本實施例之可自動調整亮度的電子裝置ι00可根 據環境亮度來自動調整本身的發光或顯示亮度，以達到節能功 ® 效’或者可得到最佳化的發光或顯示效果。本實施例的電子裝 置100包含發光模組110、控制單元12〇及至少一發光二極體 130。發光模組11〇係電性連接於控制單元12〇,用以進行發光。 控制單元120係分別電性連接於發光模組11()和發光二極體 130,用以控制發光模組ι10和發光二極體13〇c>發光二極體ι3〇 係設置於電子裝置100的外部，用以顯示電子裝置100的工作 狀態及檢測環境光強度。 請參照圖1和圖2，圖2繪示依照本發明之一實施例之電 • 子裝置的正面示意圖。在本實施例中，電子裝置100例如為液 晶顯示裝置（LCD)或包含此LCD的電子裝置，例如：桌上型電 腦、筆記型電腦、手機、可攜式裝置、個人數位助理、液晶電 視、車用顯示器、數位攝錄影機或其他電子裝置。此時，電子 裝置100可更包含液晶顯示面板14〇，而發光模組11〇例如為 背光模組’其相對於液晶顯示面板14〇設置，用以提供背光源 至液晶顯示面板140來顯示影像，其中，如圖2所示，發光二 極體130可設置液晶顯示面板14〇的一側。其中此背光模組可 為側光式（Edge Lighting)背光模組或直下式入光（B〇u〇m 7 13782901378290 - IX. Description of the Invention: [Technical Field] The present invention relates to an electronic device' and particularly relates to an electronic device capable of automatically adjusting brightness. j [Prior Art] At present, electronic devices with illumination modules or illumination modules have been widely used. Taking Liquid Crystal Display (LCD) as an example, Qin has high image quality, small size and light weight. , low drive voltage, and low power consumption, so it is widely used in personal digital assistants (PDA), mobile phones, video recorders, notebook computers, desktop monitors, vehicles Electronic products such as monitors and televisions. Generally, the liquid crystal display is mainly composed of a liquid crystal display panel and a backlight module. The backlight module is used to provide a backlight to the liquid crystal display panel to display an image. It is known that the existing liquid crystal display can be provided with a light sensor inside or outside thereof to sense the brightness of the environment, and can adjust the backlight brightness of the backlight Φ module according to the sensing result of the light sensor to achieve energy saving. efficacy. However, the above-mentioned liquid crystal display or electronic device capable of sensing the brightness of the environment requires an additional photosensor, thereby increasing its cost. Moreover, when the photo sensor is disposed outside the electronic device, the housing of the electronic device needs to be provided with an opening to mount the photo sensor, thereby increasing the cost and changing the design. SUMMARY OF THE INVENTION It is therefore an aspect of the present invention to provide an electronic device that automatically adjusts brightness [by using a light-emitting diode to display its operating state and detecting the ambient light intensity of the ring 5 1378290, thereby avoiding the provision of additional light. Sensing components while saving costs. According to an embodiment of the invention, the electronic device capable of automatically adjusting brightness comprises a light emitting module, a control unit and at least one light emitting diode control unit electrically connected to the light emitting module, and controlling the light emitting brightness of the light emitting module . The light-emitting diode is electrically connected to the control unit, wherein the light-emitting diode has a display mode and a detection mode. When the light emitting diode is in the display mode, the light emitting diode system is used to display the operating state of the electronic device. When the light emitting diode is in the detection mode, the light emitting diode system is used for detecting the ambient light intensity, and transmitting the detection signal to the control unit control unit to adjust the light emitting brightness of the light emitting module according to the detection signal. Moreover, according to an embodiment of the invention, the electronic device is a liquid crystal display device, and the light emitting module is a backlight module, which is disposed relative to the liquid crystal display panel. Moreover, the electronic device capable of automatically adjusting brightness according to the present invention comprises a display module, a control unit and a light emitting diode. The control unit is electrically connected to the display module ’ and controls the display brightness of the display module. The light emitting diode is electrically connected to the control unit, wherein the light emitting diode has a display mode and a detection mode. When the light emitting diode is in the display mode, the light emitting diode system is used to display the operation state of the electronic device. When the light emitting diode is in the detection mode, the light emitting diode system detects the ambient light intensity and transmits a detection signal to the control unit & the control unit adjusts the display brightness of the display module according to the detection signal. According to an embodiment of the invention, the electronic device is a display device, and the display module is a display panel. Therefore, the electronic device of the present invention which can automatically adjust the brightness can utilize the light emitting diode to display its operating state and detect the ambient light intensity to omit additional light sensing elements, thereby saving cost. The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; However, it is to be understood that the embodiments are merely illustrative of the embodiments of the invention and are not intended to limit the invention. Referring to FIG. 1, a block diagram of an electronic device in accordance with an embodiment of the present invention is shown. The electronic device ι00 of the present embodiment, which can automatically adjust the brightness, can automatically adjust its own illuminating or display brightness according to the brightness of the environment, so as to achieve an energy-saving function or an optimized illuminating or display effect. The electronic device 100 of the embodiment includes a light emitting module 110, a control unit 12A, and at least one light emitting diode 130. The light emitting module 11 is electrically connected to the control unit 12A for light emission. The control unit 120 is electrically connected to the light emitting module 11 ( ) and the light emitting diode 130 , and is configured to control the light emitting module ι 10 and the light emitting diode 13 〇 c > the light emitting diode ι 3 is disposed on the electronic device 100 The external part is used to display the working state of the electronic device 100 and detect the ambient light intensity. Referring to Figures 1 and 2, Figure 2 is a front elevational view of an electrical device in accordance with an embodiment of the present invention. In this embodiment, the electronic device 100 is, for example, a liquid crystal display device (LCD) or an electronic device including the LCD, such as a desktop computer, a notebook computer, a mobile phone, a portable device, a personal digital assistant, an LCD TV, Car display, digital video camera or other electronic device. At this time, the electronic device 100 may further include a liquid crystal display panel 14A, and the light emitting module 11 is, for example, a backlight module' disposed relative to the liquid crystal display panel 14 to provide a backlight to the liquid crystal display panel 140 for displaying images. Wherein, as shown in FIG. 2, the light emitting diode 130 can be disposed on one side of the liquid crystal display panel 14A. The backlight module can be an Edge Lighting backlight module or a direct-lit light (B〇u〇m 7 1378290).
Lighting)背光模組，而背光模組的光源（未繪示）例如為：冷陰 極螢光燈管（Cold Cathode Fluorescent Lamp ; CCFL)、熱陰極螢 光燈（Hot Cathode Fluorescent Lamp ; HCFL)、發光二極體 (Light-Emitting Diode ; LED)、有機發光二極體（Organic Light Emitting Diode ; OLED)、平面勞光燈(Flat Fluorescent Lamp ; FFL)或電激發光元件（Electro-Luminescence ; EL) o 請參照圖3’其繪示依照本發明之一實施例之電子裝置的 等效電路示意圖。本實施例的控制單元120例如為微控制器 (MCU)，用以控制發光模組110和發光二極體130。控制單元 120設有類比數位轉換器丨21和開關元件122。類比數位轉換 器121係電性連接於發光二極體130’用以轉換發光二極體130 對於環境光強度的檢測信號為數位信號，並將此數位信號傳送 至控制單元120。開關元件122例如為電晶體，其電性連接於 一電源VCC與發光二極體130，用以開/關電源vcC與發光二 極餿130之間的路徑，而電源VCC係用以提供電流（如電流） 至發光二極體130,藉以使發光二極體130發光。 如圖1和圖3所示，本實施例的發光二極體13〇可為無機 發光二極體或有機發光二極體，其具有一顯示模式和一檢測模 式，其中發光二極體130可藉由控制單元120來切換為顯示模 式或檢測模式。當發光二極體130為顯示模式時，控制單元120 可·控制發光二極體130來發光’以顯示電子裳置1〇〇的工作狀 態，例如.開關機狀態、省電模式狀態、正常異常狀態、警示 狀態或其他工作狀態。在一實施例中’電子裝置100可設有複 數個不同光色的發光二極體130，用以分別代表不同狀態，而 這呰發光二極體130的其中至少一者可具有顯示模式或檢測模 8 1378290 式。當發光二極體130為檢測模式時，控制單元12〇可控制開 關元件122來關閉電源VCC與發光二極體13〇之間的導通路 徑’藉以使發光一極體130進行光檢測。通常可理解的是，一 般發光一極體可同時具有發光和光檢測功能。因此，設置於電 子裝置100外部的發光二極體13〇可用以檢測環境光強度。當 發光二極體130接收到外界的光能量（環境光能量）時，發光二 極體130可傳送一檢測信號至控制單元12〇，其中此檢測信號 為類比信號。此時，控制單元12〇類比數位轉換器121可轉換 此類比的檢測信號為數位信號，再傳送至控制單元12〇。接著， 控制單兀120可根據發光二極體13〇的檢測信號來判斷是否調 整發光模組110的發光亮度。 如圖1所不，當環境光強度改變時，例如當環境光強度的 改變超出-預設容許範圍時，控制單A 120可根據發光二極體 130的檢測信號來傳送一控制信號至發光模組ιι〇,以調整發光 模組110的發光免度。在本實施例中電子裝置1〇〇例如為Lighting backlight module, and the light source (not shown) of the backlight module is, for example, a Cold Cathode Fluorescent Lamp (CCFL), a Hot Cathode Fluorescent Lamp (HCFL), and a light source. Light-Emitting Diode (LED), Organic Light Emitting Diode (OLED), Flat Fluorescent Lamp (FFL) or Electro-Luminescence (EL) o Please refer to FIG. 3′, which is a schematic diagram of an equivalent circuit of an electronic device according to an embodiment of the invention. The control unit 120 of this embodiment is, for example, a microcontroller (MCU) for controlling the light emitting module 110 and the light emitting diode 130. The control unit 120 is provided with an analog digital converter 丨21 and a switching element 122. The analog digital converter 121 is electrically connected to the light emitting diode 130' for converting the detection signal of the light emitting diode 130 to the ambient light intensity as a digital signal, and transmits the digital signal to the control unit 120. The switching element 122 is, for example, a transistor electrically connected to a power source VCC and the light emitting diode 130 for turning on/off the path between the power source vcC and the light emitting diode 130, and the power source VCC is for supplying current ( For example, current is applied to the light emitting diode 130, whereby the light emitting diode 130 emits light. As shown in FIG. 1 and FIG. 3, the light-emitting diode 13 of the present embodiment may be an inorganic light-emitting diode or an organic light-emitting diode, and has a display mode and a detection mode, wherein the light-emitting diode 130 can be Switching to the display mode or the detection mode by the control unit 120. When the light emitting diode 130 is in the display mode, the control unit 120 can control the light emitting diode 130 to emit light to display an operating state of the electronic device, for example, the power on/off state, the power saving mode state, and the normal abnormality. Status, alert status, or other work status. In an embodiment, the electronic device 100 may be provided with a plurality of light-emitting diodes 130 of different light colors for respectively representing different states, and at least one of the light-emitting diodes 130 may have a display mode or detection. Mode 8 1378290 style. When the light emitting diode 130 is in the detection mode, the control unit 12A can control the switching element 122 to turn off the conduction path between the power source VCC and the light emitting diode 13', thereby causing the light emitting body 130 to perform light detection. It is generally understood that a general light-emitting body can have both light-emitting and light-detecting functions. Therefore, the light-emitting diodes 13 disposed outside the electronic device 100 can be used to detect the ambient light intensity. When the light emitting diode 130 receives external light energy (ambient light energy), the light emitting diode 130 can transmit a detection signal to the control unit 12A, wherein the detection signal is an analog signal. At this time, the control unit 12 〇 analog digital converter 121 can convert the detection signal of such ratio into a digital signal, and then transmit it to the control unit 12A. Then, the control unit 120 determines whether or not to adjust the light-emitting brightness of the light-emitting module 110 according to the detection signal of the light-emitting diode 13A. As shown in FIG. 1, when the ambient light intensity changes, for example, when the change of the ambient light intensity exceeds the preset allowable range, the control unit A 120 can transmit a control signal to the light emitting mode according to the detection signal of the light emitting diode 130. The group is ιι〇 to adjust the illumination exemption of the illumination module 110. In this embodiment, the electronic device 1 is, for example,
或包含此LCD的電子裝置，當發光二極體13〇檢測到環境光強 度提高時’控制單元12G可控制發光模組11G來增加發光亮度， 以確保LCD的對比度n當發光二極體檢測到環境光 強度降低時，控制單元12G可控制發光模組"Ο來自動地減少 發光亮度’以節省能量。 得左w的是，發光二極體13〇的顯示模式與檢測模式〒 :門：：間隔來交互進行，此時’發光二極體130的檢測模,— s可為—短暫時間，例如發光二極體no的顯示模式時間方 :模鐘二檢可:模需=為，毫秒㈣’但顯示模式時_ 需衣而任意調整，不以此為限制。當完成一二) 9 1378290 • 環境光強度檢測後，控制單元120會立即將發光二極體130的 工作狀態由檢測模式轉換為顯示模式。由於檢測模式時間很短 暫，因而使用者不易發覺此檢測模式，進而避免影響發光二極 體130的顯示功能。 . 因此，本實施例的電子裝置100可設置發光二極體130於 其外部，以同時達到工作狀態顯示功能和環境光強度檢測功 能，因而可省略額外設置光感測元件，且無需改變電子裝置100 的外觀設計（如外殼），以節省成本，並達到節能功效。 •請參照圖4,其繪示依照本發明之另一實施例之電子裝置 的方塊示意圖。在另一實施例中，電子裝置l〇〇a例如為其他顯 示裝置，例如··有機電致發光顯示器（Organic Electro Luminescence Display ; OEL)、有機發光二極體顯示器（Organic Light Emission Diode Display; OLED)、發光二極體顯示器（Light Emission Diode Display ; LED)、電衆顯示面板（Plasma Display Panel ; PDP)、場放射顯示器（Field Emission Display)、奈米炭 管顯示器、電子墨水（E-ink)顯示器，或者為包含此顯示裝置的 • 電子裝置。電子裝置l〇〇a包含顯示模組110a、控制單元120a 及發光二極體130a。顯示模組110a例如為一顯示面板，用以 顯示影像。控制單元120a係電性連接於顯示模組110a與發光 二極體130a，用以控制顯示模組110a的顯示亮度，並可切換 發光二極體130a為顯示模式或檢測模式。發光二極體130a設 置於電子裝置l〇〇a的外部，用以顯示電子裝置100a的工作狀 態及檢測環境光強度。當發光二極體130a為顯示模式時，控制 單元120a可控制發光二極體130a來顯示電子裝置100a的工作 狀態。當發光二極體130a為檢測模式時，控制單元12(^可控 1378290 制發光—極體HOa來檢測環境光強度，並傳送_信號至控制 單元120a’藉以使控制單元根據發光二極體n〇a的檢測信號 來調整顯示模組1IOa的顯示亮度。 請參照圖5,其緣示依照本發明之又一實施例之電子裝置 -的方塊不意圖。在又一實施例中，電子裝置l〇〇b的發光模組 11〇b例如可用以照明，此時’電子裝置100b例如為相機或攝 錄影機’而發光模組11Gb例如為其閃光燈或照明燈。當發光二 極體130b為顯示模式時，控制單元12〇b可控制發光二極體 130b來發光’以顯示發光模組u〇b的工作狀態。當發光二極 體13〇b為檢測模式時’控制單元120b可控制發光二極體13〇b 來檢測環境光強度，且控制單元邊可根據發光二極體纖 的檢測信號來調整發光模組11Gb的發光亮度。在此實施例令， 當發光二極體130b檢測到環境光強度降低時，控制單元⑽ 可控制發光模組ll〇b來增加發光亮度，以確保照明功能。反 之，當發光二極體130b檢測到環境光強度提高時，控制單元 120b可控制發光模組i j 〇b來自動地減少發光亮度以節省能 # 量- 由上述本發明的實施例可知，本發明之可自動調整亮度的 電子裝置可利用發光二極體來同時達到工作狀態顯示功能和 環境光強度檢測功能，以省略額外設置的光感測元件，因而可 節省光感測元件的設置成本。 雖然本發明已以實施例揭露如上，然其並非用以限定本發 明，任何熟習此技藝者，在不脫離本發明之精神和範圍内，當 可作各種之更動與潤飾，因此本發明之保護範圍當視後附之申 請專利範圍所界定者為準。 11 1378290 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例能更 明顯易懂，所附圖式之詳細說明如下： 圖1繪示依照本發明之一實施例之電子裝置的方塊示意 圖。 圖2繪示依照本發明之一實施例之電子裝置的正面示意 圖。 鲁圖3繪示依照本發明之一實施例之電子裝置的等效電路示 意圖。 圖4繪示依照本發明之另一實施例之電子裝置的方塊示意 圖。 圖5繪示依照本發明之又一實施例之電子裝置的方塊示意 圖。 【主要元件符號說明】 # 100、100a、100b :電子裝置 110、110a、110b :發光模組 120、120a、l2〇b .控制單元121 :類比數位轉換器 122 :開關元件 130、130a、130b:發光二極體 140 ·液晶顯不面板 12Or an electronic device including the LCD, when the light-emitting diode 13 detects an increase in ambient light intensity, the control unit 12G can control the light-emitting module 11G to increase the brightness of the light to ensure the contrast of the LCD when the light-emitting diode is detected. When the ambient light intensity is lowered, the control unit 12G can control the light-emitting module to automatically reduce the light-emitting brightness to save energy. The left w is that the display mode of the light-emitting diode 13〇 and the detection mode 〒: gate:: interval are interactively performed, at this time, the detection mode of the light-emitting diode 130, s can be - a short time, such as illuminating The display mode time of the diode no: the second time of the mode clock can be: the mode needs to be =, milliseconds (four) 'but the display mode _ need to be adjusted without any restrictions. When the completion of one or two) 9 1378290 • After the ambient light intensity detection, the control unit 120 immediately converts the operating state of the light-emitting diode 130 from the detection mode to the display mode. Since the detection mode time is short, the user is not easy to detect the detection mode, thereby avoiding affecting the display function of the light-emitting diode 130. Therefore, the electronic device 100 of the embodiment can be disposed on the outside of the LED device 130 to simultaneously achieve the working state display function and the ambient light intensity detecting function, thereby omitting additional setting of the light sensing component without changing the electronic device. The design of the 100 (such as the outer casing) to save costs and achieve energy efficiency. Please refer to FIG. 4, which is a block diagram of an electronic device in accordance with another embodiment of the present invention. In another embodiment, the electronic device 10a is, for example, another display device, such as an Organic Electro Luminescence Display (OEL) or an Organic Light Emission Diode Display (OLED). ), Light Emission Diode Display (LED), Plasma Display Panel (PDP), Field Emission Display, Nano Carbon Tube Display, Electronic Ink (E-ink) A display, or an electronic device containing this display device. The electronic device 10a includes a display module 110a, a control unit 120a, and a light emitting diode 130a. The display module 110a is, for example, a display panel for displaying images. The control unit 120a is electrically connected to the display module 110a and the LEDs 130a for controlling the display brightness of the display module 110a, and can switch the LEDs 130a to the display mode or the detection mode. The light emitting diode 130a is disposed outside the electronic device 10a for displaying the operating state of the electronic device 100a and detecting the ambient light intensity. When the light emitting diode 130a is in the display mode, the control unit 120a can control the light emitting diode 130a to display the operating state of the electronic device 100a. When the light-emitting diode 130a is in the detection mode, the control unit 12 controls the light-polar body HOa to detect the ambient light intensity, and transmits a signal to the control unit 120a' so that the control unit is based on the light-emitting diode n The detection signal of 〇a is used to adjust the display brightness of the display module 110a. Referring to Figure 5, there is a block diagram of an electronic device according to still another embodiment of the present invention. In still another embodiment, the electronic device 1 The illumination module 11〇b of the 〇〇b can be used, for example, for illumination. In this case, the electronic device 100b is, for example, a camera or a video camera, and the illumination module 11Gb is, for example, a flash or an illumination lamp. When the light-emitting diode 130b is In the display mode, the control unit 12〇b can control the light-emitting diode 130b to emit light to display the operating state of the light-emitting module u〇b. When the light-emitting diode 13〇b is in the detection mode, the control unit 120b can control the light-emitting. The diode 13〇b detects the ambient light intensity, and the control unit side adjusts the light-emitting brightness of the light-emitting module 11Gb according to the detection signal of the light-emitting diode fiber. In this embodiment, when the light-emitting diode 130b detects Ambient light When the degree is lowered, the control unit (10) can control the light-emitting module 11b to increase the brightness of the light to ensure the illumination function. Conversely, when the ambient light intensity is detected by the light-emitting diode 130b, the control unit 120b can control the light-emitting module ij. 〇b to automatically reduce the brightness of the light to save energy. According to the embodiment of the present invention, the electronic device capable of automatically adjusting the brightness of the present invention can use the light emitting diode to simultaneously achieve the working state display function and the ambient light intensity. The detection function is omitted to omit the additional arrangement of the light sensing elements, thereby saving the installation cost of the light sensing elements. Although the invention has been disclosed in the above embodiments, it is not intended to limit the invention, and anyone skilled in the art The scope of protection of the present invention is defined by the scope of the appended claims. 11 1378290 [Simple Description of the Drawings] For the purposes of this disclosure, the scope of the invention is intended to be modified. The above and other objects, features, advantages and embodiments of the invention will become more apparent and understood. 2 is a schematic block diagram of an electronic device according to an embodiment of the invention. Figure 2 is a front elevational view of an electronic device according to an embodiment of the invention. 4 is a block diagram of an electronic device according to another embodiment of the present invention. FIG. 5 is a block diagram showing an electronic device according to still another embodiment of the present invention. 100a, 100b: electronic device 110, 110a, 110b: lighting module 120, 120a, l2〇b. Control unit 121: analog digital converter 122: switching element 130, 130a, 130b: light emitting diode 140 · liquid crystal display Panel 12