201018989 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 整冗度的電子裝置。 【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 蠹 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 鲁 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 201018989 . 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。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s及至少-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70，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 鲁.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 來調整顯示模組的顯示亮度。 一又，根據本發明之實施例，上述電子裝置為顯示裝置，且 顯不模組為顯示面板。 因此本發明之可自動調整亮度的電子裝置可利用發光二 極體來顯示其工作狀態，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。 201018989 【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1〇〇可根 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110係電性連接於控制單元120,用以進行發光。 控制單元120係分別電性連接於發光模組110和發光二極體 130’用以控制發光模組110和發光二極體13〇β發光二極體ι3〇 係設置於電子裝置100的外部，用以顯示電子裝置丨〇〇的工作 狀態及檢測環境光強度。 請參照圖1和圖2，圖2緣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140，而發光模組110例如為 背光模組’其相對於液晶顯示面板140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140的一侧。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 201018989 - 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)、發光二極艘 (Light-Emitting Diode ; LED)、有機發光二極體（Organic Light Emitting Diode ; OLED)、平面螢光燈(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13〇。控制單元 120設有類比數位轉換器121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’用以轉換發光二極艘13〇 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 極體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13〇發光。 φ 如圖1和圖3所示’本實施例的發光二極體130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12〇來切換為顯示模 式或檢測模式。當發光二極體130為顯示模式時，控制單元12〇 可控制發光二極體130來發光’以顯示電子裝置100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1〇〇可設有複 數個不同光色的發光二極體130’用以分別代表不同狀態，而 這些發光二極體130的其中至少一者可具有顯示模式或檢測模 201018989 式。當發光二極體130為檢測模式時，控制單元丨2〇可控制開 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，藉以使發光二極體130進行光檢測。通常可理解的是，一 般發光二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 ❹ 此類比的檢測信號為數位信號，再傳送至控制單元120。接著， 控制單7L 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所示，當環境光強度改變時，例如當環境光強度的 改變超出一預設容許範圍時，控制單元12〇可根據發光二極體 130的檢測信號來傳送一控制信號至發光模組11〇，以調整發光201018989 IX. Description of the Invention: [Technical Field] The present invention relates to an electronic device, and more particularly to an electronic device capable of automatically adjusting redundancy. [Prior Art] At present, an electronic device having a light-emitting module or a lighting module has been widely used. In the case of a liquid crystal display (LCD), the image has a high image quality, a small size, and a light weight. Low drive voltage, low power consumption, etc.' Therefore it is widely used in personal digital assistants (PDAs), mobile phones, video recorders, notebook computers, desktop monitors, car monitors. And electronic products such as television. Generally, a liquid crystal display is mainly composed of a liquid crystal display panel and a backlight module, and 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 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, thereby utilizing a light-emitting diode to display its operating state, and detecting the ambient light intensity of the ring 201018989, thereby avoiding setting 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. The control unit is electrically connected to the light emitting module and controls the 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 detects the ambient light intensity and transmits a detection signal to the control unit, and the control unit adjusts 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 s and at least 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 70, 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 working 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, and the control unit adjusts the display brightness of the display module according to the detection signal. Moreover, 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 use the light emitting diode to display its working state and detect the ambient light intensity to omit the additional light sensing element', thereby saving cost. The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The examples are only 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 1 which can automatically adjust the brightness of the embodiment can automatically adjust its own light-emitting or display brightness according to the ambient brightness to achieve energy-saving function, or can obtain an optimized light-emitting 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 110 is electrically connected to the control unit 120 for performing light emission. The control unit 120 is electrically connected to the light emitting module 110 and the light emitting diode 130 ′ for controlling the light emitting module 110 and the light emitting diode 13 〇 β light emitting diode ι 3 to be disposed outside the electronic device 100 . It is used to display the working state of the electronic device and to 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 140, and the light emitting module 110 is, for example, a backlight module' disposed relative to the liquid crystal display panel 140 for providing a backlight to the liquid crystal display panel 140 for displaying an image. As shown in FIG. 2, the light emitting diode 130 may be disposed on one side of the liquid crystal display panel 140. The backlight module can be an edge lighting backlight module or a direct-lighting (B〇u〇m 201018989 - Lighting) backlight module, and the light source (not shown) of the backlight module is, for example: Cold Cathode Fluorescent Lamp (CCFL), Hot Cathode Fluorescent Lamp (HCFL), Light-Emitting Diode (LED), Organic Light Diode (Organic Light) Emitting Diode; OLED), Flat Fluorescent Lamp (FFL) or Electro-Luminescence (EL) o Please refer to FIG. 3, which illustrates an electronic device, etc. according to an embodiment of the present invention. Schematic diagram of the effect circuit. The control unit 120 of this embodiment is, for example, a microcontroller (MCU) for controlling the light-emitting module 110 and the light-emitting diodes 13A. The control unit 120 is provided with an analog digital converter 121 and a switching element 122. The analog digital converter 121 is electrically connected to the light emitting diode 130' for converting the light emitting diode 13'. The detection signal for the ambient light intensity is a digital signal, and the digital signal is transmitted to the control unit 120. The switching element 122 is, for example, a transistor electrically connected to a path between the power source VCC and the light emitting diode 130' for turning on/off the power source VCC and the light emitting diode 130, and the power source VCC is used to supply current ( For example, current) to the light-emitting diode 130, whereby the light-emitting diode 13 is illuminated. As shown in FIG. 1 and FIG. 3, the light-emitting diode 130 of the present embodiment may be an inorganic light-emitting diode or an organic light-emitting diode having a display mode and a detection mode, wherein the light-emitting diode 130 may be Switching to the display mode or the detection mode by the control unit 12A. When the light emitting diode 130 is in the display mode, the control unit 12 can control the light emitting diode 130 to emit 'to display the working state of the electronic device 100', for example: power on/off state, power saving mode state, normal abnormal state, warning Status or other working status. In an embodiment, the electronic device 1 may be provided with a plurality of light-emitting diodes 130 ′ of different light colors to respectively represent different states, and at least one of the light-emitting diodes 130 may have a display mode or Detection mode 201018989. When the light emitting diode 130 is in the detection mode, the control unit 丨2〇 can control the switching element 122 to turn off the conduction path between the power source VCC and the light emitting diode 13〇, thereby causing the light emitting diode 130 to perform light detection. It is generally understood that a general light emitting diode can have both illumination and light detection 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 detected signal of such ratio into a digital signal and transmit it to the control unit 120. Next, the control unit 7L 120 can determine whether 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 a predetermined allowable range, the control unit 12 can transmit a control signal to the light emitting mode according to the detection signal of the light emitting diode 130. Group 11〇 to adjust the glow
模組110的發光亮度。在本實施例中，電子裝置1〇〇例如為LCD 或包含此LCD的電子農置，當發光二極體13〇檢測到環境光強 •度提高時’控制單元120可控制發光模組110來增加發光亮度， 以確保LCD的對比度。反之，當發光二極趙13〇檢測到環境光 強度降低時’控制單元12G可控制發光模組m來自動地減少 發光亮度，以節省能量。 值得注意的是，發光二極體130的顯示模式與檢測模式可 依一預設間隔來交互進行，此時，發光二極體13〇的檢測模式 時可為短暫時間’例如發光二極體13〇的顯示模式時間為 .为鐘而檢測模式時間為20毫秒㈣，但顯示模式時間和檢 測模式時間可依需求而任意調整，不以此為限制。當完成—次 201018989 • 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。 φ 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100a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)、電聚顯示面板（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 φ 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120a可控 201018989 •制發光二極體13Ga來檢測環境絲度，並傳送檢測信號至控制 單兀12〇a，藉以使控制單元根據發光二極體130a的檢測信號 來調整顯示模組11〇a的顯示亮度。 言月參照圖5，其螬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—實施射，電子裝s lGQb的發光模組 ll〇b例如可用以照明’此時’電子裝置職例如為相機或攝 錄影機，而發光模組丨丨ob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 籲130b來發光，以顯示發光模組n〇b的工作狀態。當發光二極 體130b為檢測模式時，控制單元12〇b可控制發光二極艘 來檢測環境光強度，且控制單元12〇b可根據發光二極體13〇b 的檢測信號來調整發光模組11〇b的發光亮度。在此實施例中， 當發光二極體130b檢測到環境光強度降低時，控制單元120b 可控制發光模組1 1 Ob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11 〇b來自動地減少發光亮度，以節省能 參量。 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》 201018989 【圖式簡單說明】 優點與實施例能更 為讓本發明之上述和其他目的、特徵 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 圖 實施例之電子裝置的方塊示意 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。 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、120b :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 12The brightness of the light emitted by the module 110. In this embodiment, the electronic device 1 is, for example, an LCD or an electronic farm including the LCD. When the light-emitting diode 13 detects an increase in the ambient light intensity, the control unit 120 can control the light-emitting module 110. Increase the brightness of the light to ensure the contrast of the LCD. On the other hand, when the illuminating diode 13 〇 detects that the ambient light intensity is lowered, the control unit 12G can control the illuminating module m to automatically reduce the illuminating brightness to save energy. It should be noted that the display mode and the detection mode of the LEDs 130 can be alternately performed according to a preset interval. In this case, the detection mode of the LEDs 13 可 can be a short time, for example, the LEDs 13 The display mode time of 〇 is . for the clock and the detection mode time is 20 milliseconds (four), but the display mode time and the detection mode time can be arbitrarily adjusted according to requirements, and are not limited thereto. When completed - 201018989 • 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 present embodiment can be disposed outside the light emitting diode 130 to simultaneously achieve the working state display function and the ambient light intensity detecting function, so that the additional light sensing component can be omitted, and the electronic device 100 does not need to be changed. The design (such as the outer casing) to save costs and achieve energy efficiency. φ Please refer to FIG. 4, which is a block diagram of an electronic device according to another embodiment of the present invention. In another embodiment, the electronic device 100a is, for example, another display device, such as an Organic Electro Luminescence Display (OEL), an Organic Light Emission Diode Display (OLED), and a Light Emitting Diode (OLED). Light Emission Diode Display (LED), Plasma Display Panel (PDP), Field Emission Display, Nano Carbon Tube Display, E-ink Display, or A φ 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 120a can control the light emitting diode 13Ga to detect the ambient lightness, and transmit a detection signal to the control unit 12〇a, so that the control unit is based on the light emitting diode The detection signal of the body 130a adjusts the display brightness of the display module 11A. Referring to Fig. 5, there is shown a block diagram of an electronic device in accordance with still another embodiment of the present invention. In another embodiment, the illumination module 110b can be used to illuminate the 'at this time' electronic device such as a camera or a video camera, and the illumination module 丨丨ob is for example a flash or illumination thereof. light. When the light emitting diode 130b is in the display mode, the control unit 12b can control the light emitting diodes 130b to emit light to display the operating state of the light emitting module n〇b. When the light emitting diode 130b is in the detection mode, the control unit 12〇b can control the light emitting diode to detect the ambient light intensity, and the control unit 12〇b can adjust the light emitting mode according to the detection signal of the light emitting diode 13〇b. The brightness of the group 11〇b. In this embodiment, when the light emitting diode 130b detects that the ambient light intensity is reduced, the control unit 120b can control the light emitting module 11b to increase the light emitting brightness to ensure the lighting function. Conversely, when the light-emitting diode 130b detects an increase in ambient light intensity, the control unit 120b can control the light-emitting module 11 〇b to automatically reduce the light-emitting brightness 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 simultaneously use the light emitting diode to simultaneously achieve the working state display function and the ambient light intensity detecting function, thereby omitting the additionally disposed light sensing component. The installation cost of the light sensing component can be saved. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and retouched without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims. 201018989 [Brief Description of the Drawings] Advantages and embodiments can make the above and other objects and features of the present invention clear and easy to understand. 1 is a block diagram of an electronic device according to an embodiment of the present invention. FIG. 2 is a front elevational view of an electronic device according to an embodiment of the present invention. 3 is a schematic circuit diagram of an electronic device in accordance with an embodiment of the present invention. 4 is a block diagram of an electronic device in accordance with 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. [Main component symbol description] 100, 100a, 100b: electronic device 110, 110a, 110b: lighting module 120, 120a, 120b: control unit 121: analog digital converter 122: switching element 130, 130a, 130b: light emitting diode Body 140. Liquid crystal display panel 12