201110094 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種顯示裴置，特別關於一種顯示裝置 及發光模組。 【先前技術】 近年來’液晶顯示裝置因其體型輕薄、低功率消耗及 β 無輻射等優越特性，已經漸漸地取代傳統陰極射線管 (Cathode Ray Tube，CRT)顯示裝置，並且應用至各式電 子產品。對液晶顯示裝置而言，如何提升影像品質一直是 研發人員所追求的目標。 一般而言，液晶顯示裝置係包含一背光模組及一液晶 顯示面板。背光模組係包含複數燈管以提供光線，其中燈 管係藉由高壓交流訊號驅動而發光。液晶顯示面板係包含 一彩色濾光基板及一薄膜電晶體基板，且二基板之間係夾 # 置一液晶層。液晶層之液晶分子係藉由施加電場所驅動以 轉動或傾倒至預定位置。燈管發出之光線經由液晶層調變 其偏振態進而能夠產生影像。 圖1係依據一種習知背光模組的方塊示意圖，其中， 背光模組4包含一脈寬調變控制器41 ( Pulse Width201110094 VI. Description of the Invention: [Technical Field] The present invention relates to a display device, and more particularly to a display device and a light-emitting module. [Prior Art] In recent years, liquid crystal display devices have gradually replaced traditional cathode ray tube (CRT) display devices due to their superior size, low power consumption, and no radiation, and have been applied to various types of electronic devices. product. For liquid crystal display devices, how to improve image quality has always been the goal pursued by researchers. Generally, a liquid crystal display device includes a backlight module and a liquid crystal display panel. The backlight module includes a plurality of lamps for providing light, wherein the lamps are driven by high voltage alternating current signals to emit light. The liquid crystal display panel comprises a color filter substrate and a thin film transistor substrate, and a liquid crystal layer is sandwiched between the two substrates. The liquid crystal molecules of the liquid crystal layer are driven to rotate or tilt to a predetermined position by application of an electric field. The light emitted by the tube is modulated by the liquid crystal layer to produce an image. 1 is a block diagram of a conventional backlight module, wherein the backlight module 4 includes a pulse width modulation controller 41 (Pulse Width)
Modulation Controller, PWM Controller)、一時脈產生器 42 (Clock Generation)、一直流/交流電路 43( dc/AC Circuit) 以及一燈管44 (Lamp)。其中，直流/交流電路43與時脈 產生器42及脈寬調變控制器41及燈管44電性連接。 201110094 時脈產生器42輸出一時脈訊號，觸發啟動直流/交流 電路43作動，使直流/交流電路43依據脈寬調變控制器 41輸出的脈寬調變訊號將一直流訊號轉換為交流訊號，並 進行升壓，以輸出並驅動燈管44發光。 燈官4.4具有兩電極，故可藉由雙邊驅動方式來提升 驅動的電壓差以提高亮度。圖2係為習知雙邊驅動所使用 的驅動訊號的示意圖，其中，横軸代表時間，縱軸代表驅 動訊號之強度。® 2所示之驅動職係為上述之脈寬調變 訊號。在傳統雙邊驅動時，左、右兩電極係同時被驅動， 也就是左、右兩電極的驅動訊號係同相。 然而，在背光模組中，背板與燈管之間的電容效應會 使燈管内的管電流產生漏電流現象，使得f光模組的亮度 無法均㈣分佈，這種情形在脈寬婦絲具有低責任週 期（duty cyde)日寺更加嚴重。圖3係依據習知具有低責任 週期之驅動訊號進行雙邊驅動所得_亮度分佈圖。如圖 3所示，在背板中間的範圍（背板位置4至6之間）的亮 度較低，也歧燈管中間的亮度會比兩邊驅動電極來得暗 一些’如此將使面板顯示的亮度不均句而影響顯示品質。 特別是在大尺寸或長燈管的情況，亮度不均㈣問題更加 嚴重。 —^另卜在傳、先單邊驅動時（也就是驅動訊號只驅動燈 S單邊迅極而使燈管發光），亦會有漏電流的現象導致亮 度不均的問題並且在大尺寸或長燈管且_訊號具低責 任週期時，亮度不岣勻的現象更加明顯。 、 201110094 因此，如何提供一種顯示裝置及發光模組，能夠解決 上述問題以提升顯示晝面的均勻度及顯示品質，實為當前 重要課題之一。 【發明内容】 有鑑於上述課題，本發明之目的為提供一種能夠提升 顯示晝面均勻度及顯示品質之顯示裝置及發光模組。 I 為達上述目的，依本發明之一種發光模組包含一燈 管、一第一驅動單元以及一第二驅動單元。燈管具有一第 一電極及一第二電極。第一驅動單元係與第一電極電性連 接，第二驅動單元係與第二電極電性連接。其中，第一驅 動單元及第二驅動單元係於一驅動時間内，交替地驅動第 一電極及第二電極。 為達上述目的，依本發明之一種發光模組包含一第一 燈管、一第二燈管、一第一驅動單元及一第二驅動單元。 • 第一燈管具有一第一電極。第二燈管具有一第二電極，且 第一電極與第二電極位於第一燈管及第二燈管的相對 側。第一驅動單元係與第一電極電性連接，且第一燈管的 另一電極係電性連接一參考電壓。第二驅動單元係與第二 電極電性連接，且第二燈管的另一電極係電性連接另一參 考電壓。其中，第一驅動單元及第二驅動單元係於一驅動 時間内，交替地驅動第一電極及第二電極。 為達上述目的，依本發明之一種顯示裝置包含一顯示 面板以及一背光模組，背光模組係與顯示面板相對而設並 201110094 包含一燈管、一第一驅動單元及一第二驅動單元。燈管具 有一第一電極及一第二電極。第一驅動單元係與第一電極 電性連接，第二驅動單元係與第二電極電性連接。其中， 第一驅動單元及該第二驅動單元係於一驅動時間内，交替 地驅動第一電極及第二電極。 為達上述目的，依本發明之一種顯示裝置包含一顯示 面板以及一背光模組，背光模組係與顯示面板相對而設， 並包含一第一燈管、一第二燈管、一第一驅動單元及一第 二驅動單元。第一燈管具有一第一電極，第二燈管具有一 第二電極，且第一電極與第二電極位於第一燈管及第二燈 管的相對側。第一驅動單元係與第一電極電性連接，且第 一燈管的另一電極係電性連接一參考電壓。第二驅動單元 係與第二電極電性連接，且第二燈管的另一電極係電性連 接另一參考電壓。其中，第一驅動單元及第二驅動單元係 於一驅動時間内，交替地驅動第一電極及第二電極。 承上所述，本發明之顯示裝置及發光模組，不管是以 單邊驅動方式驅動其燈管、或以雙邊驅動方式驅動其燈 管，因驅動單元是利用不同時間交替地驅動電極，以點亮 燈管，再利用人眼在時間上對亮度的積分效果以達到亮度 的平均化，進而達到發光的均勻性。因此，本發明於低責 任週期時，能夠有效提升亮度的均句度及顯示品質。 【實施方式】 以下將參照相關圖式，說明依本發明較佳實施例之顯 201110094 示裝置及發光模組。 圖4為本發明第一實施例之一種發光模組1的示意 圖。本實施例之發光模組！可為背光模组或照明模組，盆 中背光模組可為直下式背光模組或側光式背光模組。〃 々發光:莫組1包含一燈管n、一第一驅動單元12及一 第:驅動單兀13。本實施例係以四組燈管、第-驅動單元 ，第二驅動單元為例。燈管η係可為直線型燈管、u型燈 官或s型燈管，於此係以直線型燈管為例。另外，本實施 例之燈官11係以冷陰極燈管為例。燈管Η呈 命 極111及一第二電極112。 ^弟电 μ本實施例之發光模組丨似雙邊驅動^驅動其燈 管’其中第一驅動單元12係與第一電極ln電性連接^而 ^驅動單元13係與第二電極112電性連接。第一驅動 =12及第二驅動單元13係於—驅動時間内，交替地驅 一電極111及第二電極112，以使燈管u發光。在本 實施例中，第-驅動單元12及第二驅動單元13可包含 脈產^電路、脈寬難電路及錢/交流電料，用以產生 乂 同壓"5虎來驅動燈管1 1發光。 凊參照圖5所示，於驅動時間内，第一驅動單元12 係依據一第：驅動訊號驅動第-電極m，第二驅動單元 13係依據一第二驅動訊號驅動第二電極ιΐ2。第 =有至少-第一脈衝（Pulse)，第二驅動訊號具有至； -弟二脈衝。在本實施例中，第—脈衝與第：脈衝在 轴上係完全不重疊，使得第一電極ln及第二電極H2六 201110094 替被驅動。 - 另外，第一脈衝或第二脈衝之貴任週期（Duty Cycle) 為可調整的，以達到所需之亮度。本實施例之第一脈衝與 第二脈衝是在同一視框時間T内驅動。此外，第一脈衝與 第二脈衝之責任週期可調動，例如可增加13%，藉以達到 與習知同樣需求之亮度的效果。藉此，由人眼對亮度的積 分效果，除了達到與習知同樣需求之亮度的效果，更可解 決習知之燈管的中間部位亮度衰減的問題。 於本實施例中，第一驅動訊號與第二驅動訊號係週期 性且交替地驅動第一電極111及第二電極112。另外，本 實施例之第一驅動訊號及第二驅動訊號係以由驅動單元 12、13之脈寬調變電路所產生之脈寬調變訊號為例。 另外，本實施例之第一驅動訊號或第二驅動訊號之振 幅亦為可調整的。請參照圖6所示，與上述實施例不同的 是，本實施例之第一及第二脈衝之貴任週期與習知驅動訊 號（斜線部分）之責任週期相同（例如同為10%)，但第 一脈衝或第二脈衝之振幅（也就是強度）為可調整的，例 如可增加三分之一倍；當然，倍數可依據實際測得的亮度 而有所調整。 另外，本實施例之第一及第二脈衝可對應於不同之視 框時間T。請參照圖7所示，與上述實施例不同的是，本 實施例之第一脈衝與第二脈衝是分別對應於相鄰之視框 時間T，亦即在相鄰視框時間T内驅動。此外，因於一視 框時間T内僅驅動第一脈衝或第二脈衝，若為達與習知雙 201110094 邊驅動相同之亮度，第一脈衝與第二脈衝之責任週期需提 高，例如是習知雙邊驅動訊號（斜線部分）的2倍，以習 知雙邊驅動訊號之貴任週期是10%為例，本實施例之第一 驅動訊號及第二驅動訊號之責任週期可調整為20% ;當 然，責任週期可依據測得的亮度而有所回饋控制調整。 此外，圖8所示為調整強度之第一脈衝及第二脈衝係 對應於相鄰視框時間T内。在本實施例中，由於第一及第 0 二脈衝存在於相鄰視框時間T内，故需提高兩脈衝之強 度，例如為習知燈管雙邊驅動訊號（斜線部份）的2倍； 當然，倍數可依據測得的亮度而有所回饋控制調整。 圖9為本發明第二實施例之一種發光模組2的示意 圖。本實施例之發光模組2係可為為背光模組或照明模 組，其中背光模組可為直下式背光模組或側光式背光模 組。 發光模組2包含一第一燈管21、一第二燈管24、一 • 第一驅動單元22、一第二驅動單元23。第一燈管21具有 一第一電極211，第二燈管24具有一第二電極242，且第 一電極211與第二電極242位於第一燈管21及第二燈管 24的相對侧。第一燈管21及第二燈管24可為直線型燈 管、U型燈管或S型燈管，於此係以直線型燈管為例。另 外，本實施例之燈管21、24係以冷陰極燈管為例。本實 施例係以兩組第一燈管21及第二燈管24為例。 本實施例之發光模組2係以單邊驅動方式驅動其燈 管。第一驅動單元22係與第一電極211電性連接，而第 201110094 一燈管21之另一電極係電性連接一參考電壓（例如接 地）。第二驅動單元23係與第二電極242電性連接，第二 燈管24之另一電極係電性連接另一參考電壓（例如接 地）。此外，第一驅動單元22及第二驅動單元23係於一 驅動時間内，交替地驅動第一電極211及第二電極242。 在本實施例中，第一驅動單元22及第二驅動單元23可包 含時脈產生電路、脈寬調變電路及直流/交流電路等，用以 產生交流高壓訊號來驅動燈管21、24發光。 在本實施例中，於一驅動時間内，第一驅動單元22 係依據一第一驅動訊號驅動第一電極211，而第二驅動單 元23係依據一第二驅動訊號驅動第二電極242，且該第一 驅動訊號具有至少一第一脈衝，該第二驅動訊號具有至少 一第二脈衝。 在本實施例中，第一驅動訊號及第二驅動訊號的技術 特徵，例如：第一脈衝與該第二脈衝在時間軸上係完全不 重疊、第一脈衝或第二脈衝之責任週期為可調整的、第一 脈衝或第二脈衝之振幅為可調整的、第一脈衝及第二脈衝 對應於同一視框時間及第一脈衝以及第二脈衝分別對應 於相鄰之視框時間，可參照圖5至圖8及相關說明，於此 不再贅述。 本實施例亦同樣藉由人眼對亮度的積分效果，而達到 與習知同樣需求之亮度的效果，但卻因為單一電極之驅動 訊號的責任週期或振幅較習知增加，而解決習知之燈管的 中間部位亮度衰減的問題。 10 201110094 請參照圖ίο所示，本發明較佳實施例之一種顯示裝 置5包含一顯示面板51以及一背光模組BL，背光模組BL 與顯示面板51相對而設。其中顯示面板51係以液晶顯示 面板為例，並可包含一彩色濾光基板及一薄膜電晶體基 板，且二基板之間係夾置一液晶層。另外，背光模組BL 可包含上述發光模組1、或發光模組2或其組合。由於發 光模組1、2已於上述實施例詳述，故不再贅述。當然， I 背光模組BL另可具有導光板、擴散板或光學膜等光學元 件。 综上所述，本發明之顯示裝置與發光模組，因第一驅 動單元及第二驅動單元係於一驅動時間内，交替地驅動第 一電極及第二電極，並各別加大驅動功率來驅動，再利用 人眼在時間上對交替點亮所產生之亮度的積分效果以達 到亮度的平均化，進而達到均勻出光。因此，本發明可以 有效提升顯示晝面亮度的均勻度及顯示品質。 • 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1為依據一種習知背光模組的方塊示意圖； 圖2為圖1之背光模組用以驅動燈管的驅動訊號的示 意圖； 圖3為圖1之背光模組之動態實驗的亮度分佈示意 11 201110094 圖； 圖4為依據本發明第一實施例之發光模組的示意圖； 圖5至圖8為依據本發明第一實施例之發光模組所使 用之驅動訊號的示意圖； 圖9為依據本發明第二實施例之發光模組的示意圖； 以及 圖10為依據本發明較佳實施例之一種顯示裝置的示 意圖。 【主要元件符號說明】 1、2 :發光模組 11、44 :燈管 111、211 :第一電極 112、242 :第二電極 12、22 :第一驅動單元 13、23 :第二驅動單元 21 :第一燈管 24 :第二燈管 4、BL :背光模組 41 :脈寬調變控制器 42 :時脈產生器 43 :直流/交流電路 5 :顯示裝置 T:視框時間 51 :顯示面板 12Modulation Controller (PWM Controller), a clock generator 42 (Clock Generation), a DC/AC circuit 43 (dc/AC Circuit), and a lamp 44 (Lamp). The DC/AC circuit 43 is electrically connected to the clock generator 42, the pulse width modulation controller 41, and the bulb 44. The clock generator 42 outputs a clock signal, and triggers the activation of the DC/AC circuit 43 to cause the DC/AC circuit 43 to convert the DC signal into an AC signal according to the pulse width modulation signal output by the PWM controller 41. And boosting is performed to output and drive the lamp 44 to emit light. The lamp 4.4 has two electrodes, so the driving voltage difference can be increased by the bilateral driving method to increase the brightness. Fig. 2 is a schematic diagram of a driving signal used in a conventional bilateral driving, in which the horizontal axis represents time and the vertical axis represents the intensity of the driving signal. The driving grade shown in ® 2 is the above-mentioned pulse width modulation signal. In the traditional bilateral driving, the left and right electrodes are driven at the same time, that is, the driving signals of the left and right electrodes are in phase. However, in the backlight module, the capacitive effect between the back plate and the lamp tube causes a leakage current phenomenon in the tube current in the lamp tube, so that the brightness of the f-light module cannot be uniformly distributed (four). The silk has a low duty cycle (duty cyde) and the temple is more serious. Fig. 3 is a graph showing the brightness obtained by bilateral driving according to a driving signal having a low duty cycle. As shown in Figure 3, the brightness in the middle of the backplane (between the backplane positions 4 and 6) is lower, and the brightness in the middle of the lamp will be darker than the drive electrodes on both sides. Inconsistent sentences affect display quality. Especially in the case of large size or long tubes, uneven brightness (4) is more serious. -^ In the case of transmission and unilateral driving (that is, the driving signal only drives the lamp S to be unilaterally fast and the lamp is illuminated), there is also a leakage current phenomenon that causes uneven brightness and is large in size or When the long lamp is used and the signal has a low duty cycle, the phenomenon that the brightness is not uniform is more obvious. 201110094 Therefore, how to provide a display device and a light-emitting module can solve the above problems to improve the uniformity and display quality of the display surface, which is one of the current important issues. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a display device and a light-emitting module capable of improving display uniformity and display quality. In order to achieve the above object, a lighting module according to the present invention comprises a lamp, a first driving unit and a second driving unit. The tube has a first electrode and a second electrode. The first driving unit is electrically connected to the first electrode, and the second driving unit is electrically connected to the second electrode. The first driving unit and the second driving unit alternately drive the first electrode and the second electrode within a driving time. To achieve the above objective, a lighting module according to the present invention comprises a first lamp, a second lamp, a first driving unit and a second driving unit. • The first tube has a first electrode. The second tube has a second electrode, and the first electrode and the second electrode are located on opposite sides of the first tube and the second tube. The first driving unit is electrically connected to the first electrode, and the other electrode of the first tube is electrically connected to a reference voltage. The second driving unit is electrically connected to the second electrode, and the other electrode of the second tube is electrically connected to another reference voltage. The first driving unit and the second driving unit alternately drive the first electrode and the second electrode within a driving time. In order to achieve the above object, a display device according to the present invention includes a display panel and a backlight module. The backlight module is opposite to the display panel and includes a lamp, a first driving unit and a second driving unit. . The lamp has a first electrode and a second electrode. The first driving unit is electrically connected to the first electrode, and the second driving unit is electrically connected to the second electrode. The first driving unit and the second driving unit alternately drive the first electrode and the second electrode within a driving time. In order to achieve the above object, a display device according to the present invention includes a display panel and a backlight module. The backlight module is opposite to the display panel and includes a first tube, a second tube, and a first a drive unit and a second drive unit. The first tube has a first electrode, the second tube has a second electrode, and the first electrode and the second electrode are located on opposite sides of the first tube and the second tube. The first driving unit is electrically connected to the first electrode, and the other electrode of the first tube is electrically connected to a reference voltage. The second driving unit is electrically connected to the second electrode, and the other electrode of the second tube is electrically connected to another reference voltage. The first driving unit and the second driving unit alternately drive the first electrode and the second electrode within a driving time. As described above, the display device and the light-emitting module of the present invention drive the lamp tube in a single-side driving manner or drive the lamp tube in a bilateral driving manner, because the driving unit alternately drives the electrodes with different times. The lamp tube is lit, and the integration effect of the human eye on the brightness in time is used to achieve the averaging of the brightness, thereby achieving uniformity of illumination. Therefore, the present invention can effectively improve the uniformity of the brightness and the display quality at a low duty cycle. [Embodiment] Hereinafter, a display device and a light-emitting module according to a preferred embodiment of the present invention will be described with reference to the related drawings. Fig. 4 is a schematic view of a light-emitting module 1 according to a first embodiment of the present invention. The light emitting module of this embodiment! It can be a backlight module or a lighting module, and the backlight module in the basin can be a direct-lit backlight module or an edge-lit backlight module. 〃 々 illuminating: The group 1 comprises a lamp n, a first driving unit 12 and a first: driving unit 13 . In this embodiment, four sets of lamps, a first drive unit, and a second drive unit are taken as an example. The lamp η can be a linear lamp, a u-lamp or an s-tube, and a linear lamp is taken as an example. Further, the lamp officer 11 of the present embodiment is exemplified by a cold cathode lamp. The lamp tube Η is a life electrode 111 and a second electrode 112. The light-emitting module of the present embodiment is similar to the double-side drive ^ driving the lamp tube 'where the first driving unit 12 is electrically connected to the first electrode ln and the driving unit 13 is electrically connected to the second electrode 112 connection. The first driving =12 and the second driving unit 13 alternately drive an electrode 111 and a second electrode 112 during the driving time to cause the lamp u to emit light. In this embodiment, the first driving unit 12 and the second driving unit 13 may include a pulse generating circuit, a pulse width hard circuit, and a money/alternating current material for generating the same pressure "5 tiger to drive the light tube 1 1 Glowing. Referring to FIG. 5, during the driving time, the first driving unit 12 drives the first electrode m according to a first driving signal, and the second driving unit 13 drives the second electrode ι2 according to a second driving signal. The first = there is at least - the first pulse (Pulse), the second drive signal has to; - the second pulse. In this embodiment, the first pulse and the third pulse are not overlapped on the axis at all, so that the first electrode ln and the second electrode H2 are driven to be driven. - In addition, the duty cycle of the first pulse or the second pulse is adjustable to achieve the desired brightness. The first pulse and the second pulse of this embodiment are driven within the same frame time T. In addition, the duty cycle of the first pulse and the second pulse can be adjusted, for example, by 13%, to achieve the same desired brightness as conventional. Thereby, the effect of the integration of the brightness by the human eye, in addition to the effect of the brightness required by the conventional one, can solve the problem of the brightness reduction in the middle portion of the conventional lamp. In this embodiment, the first driving signal and the second driving signal periodically and alternately drive the first electrode 111 and the second electrode 112. In addition, the first driving signal and the second driving signal of the embodiment are exemplified by the pulse width modulation signal generated by the pulse width modulation circuit of the driving units 12 and 13. In addition, the amplitude of the first driving signal or the second driving signal of the embodiment is also adjustable. Referring to FIG. 6, the difference from the above embodiment is that the duty cycle of the first and second pulses of the embodiment is the same as the duty cycle of the conventional drive signal (hatched portion) (for example, 10%). However, the amplitude (i.e., intensity) of the first pulse or the second pulse is adjustable, for example, by a factor of three; of course, the multiple can be adjusted depending on the actual measured brightness. Additionally, the first and second pulses of this embodiment may correspond to different frame times T. Referring to FIG. 7, different from the above embodiment, the first pulse and the second pulse of the embodiment respectively correspond to adjacent frame time T, that is, drive in the adjacent frame time T. In addition, since only the first pulse or the second pulse is driven in the frame time T, if the brightness is the same as that of the conventional double 201110094, the duty cycle of the first pulse and the second pulse needs to be improved, for example, For example, the duty cycle of the first driving signal and the second driving signal in this embodiment can be adjusted to 20%; for example, the duty cycle of the conventional driving signal is 10%. Of course, the duty cycle can be adjusted based on the measured brightness. Further, Fig. 8 shows that the first pulse and the second pulse of the adjustment intensity correspond to the adjacent frame time T. In this embodiment, since the first and the second two pulses are present in the adjacent frame time T, it is necessary to increase the intensity of the two pulses, for example, twice as long as the conventional lamp bilateral driving signal (hatched portion); Of course, the multiple can be adjusted in response to the measured brightness. Fig. 9 is a schematic view of a light-emitting module 2 according to a second embodiment of the present invention. The illumination module 2 of the embodiment can be a backlight module or a lighting module, wherein the backlight module can be a direct-lit backlight module or an edge-lit backlight module. The light module 2 includes a first tube 21, a second tube 24, a first driving unit 22, and a second driving unit 23. The first tube 21 has a first electrode 211, the second tube 24 has a second electrode 242, and the first electrode 211 and the second electrode 242 are located on opposite sides of the first tube 21 and the second tube 24. The first tube 21 and the second tube 24 may be a linear tube, a U-shaped tube or an S-type tube. Here, a linear tube is taken as an example. In addition, the lamps 21 and 24 of the present embodiment are exemplified by a cold cathode lamp. In this embodiment, two sets of first tube 21 and second tube 24 are taken as an example. The light-emitting module 2 of this embodiment drives its lamp in a single-sided driving manner. The first driving unit 22 is electrically connected to the first electrode 211, and the other electrode of the lamp unit 21 is electrically connected to a reference voltage (for example, ground). The second driving unit 23 is electrically connected to the second electrode 242, and the other electrode of the second tube 24 is electrically connected to another reference voltage (for example, ground). In addition, the first driving unit 22 and the second driving unit 23 alternately drive the first electrode 211 and the second electrode 242 within a driving time. In this embodiment, the first driving unit 22 and the second driving unit 23 may include a clock generation circuit, a pulse width modulation circuit, and a DC/AC circuit for generating an AC high voltage signal to drive the lamps 21 and 24 Glowing. In this embodiment, the first driving unit 22 drives the first electrode 211 according to a first driving signal, and the second driving unit 23 drives the second electrode 242 according to a second driving signal. The first driving signal has at least one first pulse, and the second driving signal has at least one second pulse. In this embodiment, the technical characteristics of the first driving signal and the second driving signal, for example, the first pulse and the second pulse do not overlap at all on the time axis, and the duty cycle of the first pulse or the second pulse is The amplitude of the adjusted first pulse or the second pulse is adjustable, the first pulse and the second pulse correspond to the same frame time, and the first pulse and the second pulse respectively correspond to adjacent frame time, and can be referred to 5 to 8 and related descriptions are not described herein again. In this embodiment, the effect of the brightness required by the human eye is also achieved by the integral effect of the human eye on the brightness, but the conventional lamp is solved because the duty cycle or amplitude of the driving signal of the single electrode is increased as compared with the conventional one. The problem of brightness degradation in the middle of the tube. Referring to FIG. 3, a display device 5 according to a preferred embodiment of the present invention includes a display panel 51 and a backlight module BL. The backlight module BL is opposite to the display panel 51. The display panel 51 is exemplified by a liquid crystal display panel, and may include a color filter substrate and a thin film transistor substrate, and a liquid crystal layer is sandwiched between the two substrates. In addition, the backlight module BL may include the above-described light emitting module 1 or the light emitting module 2 or a combination thereof. Since the light-emitting modules 1 and 2 have been described in detail in the above embodiments, they will not be described again. Of course, the I backlight module BL may further have optical elements such as a light guide plate, a diffusion plate or an optical film. In summary, in the display device and the light-emitting module of the present invention, the first driving unit and the second driving unit are alternately driving the first electrode and the second electrode within a driving time, and respectively increasing the driving power. To drive, and then use the integration effect of the human eye on the brightness generated by the alternate lighting in time to achieve the averaging of the brightness, thereby achieving uniform light output. Therefore, the present invention can effectively improve the uniformity and display quality of the brightness of the display surface. • The above description is for illustrative purposes only and is not a limitation. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a conventional backlight module; FIG. 2 is a schematic diagram of a driving signal of the backlight module of FIG. 1 for driving a lamp; FIG. 3 is a backlight module of FIG. FIG. 4 is a schematic diagram of a light emitting module according to a first embodiment of the present invention; FIG. 5 to FIG. 8 are driving signals used by the light emitting module according to the first embodiment of the present invention. 9 is a schematic view of a light emitting module according to a second embodiment of the present invention; and FIG. 10 is a schematic view of a display device in accordance with a preferred embodiment of the present invention. [Main component symbol description] 1, 2: light-emitting module 11, 44: lamp tube 111, 211: first electrode 112, 242: second electrode 12, 22: first drive unit 13, 23: second drive unit 21 : First lamp tube 24 : Second lamp tube 4 , BL : Backlight module 41 : Pulse width modulation controller 42 : Clock generator 43 : DC / AC circuit 5 : Display device T : Frame time 51 : Display Panel 12