TW201003217A - Liquid crystal display and light emitting diode backlight module driving apparatus and method thereof - Google Patents

Abstract

A liquid crystal display (LCD) and a light emitting diode (LED) backlight module driving apparatus and a method thereof are provided. The LED driving apparatus includes a control unit and a driving unit. The control unit alternately provides a first control signal and a second control signal according to a switching signal. The driving unit is coupled to the control unit for driving at least an LED of a first color within the LED backlight module, so as to the driven LED can be appeared at least two first colors with different wavelength.

Description

201003217 rU,v/^〇〇£ZlTW 26705twf.doc/n Nine, invention description: [Technical field of invention], age Ming ^ about - kind of flat display technology 'and especially about one = initial reduction of its luminous two Polar body backlight module drive and method. [First technology] When the photoelectric and semiconductor technology evolved, it led to the flat display r. ^ exhibition, and in many flat-panel displays, the liquid crystal display has a space, efficiency, low, and power consumption. With the riding and low electromagnetic interference A 4, Pa has become the mainstream of the market. The liquid crystal display generally includes a liquid crystal display panel and a backlight module. Since the liquid crystal display panel itself does not have self-illuminating characteristics, the backlight module must be disposed under the liquid crystal display panel to provide a light source required for the liquid crystal display panel. In this way, the liquid crystal display can display images for viewing by the user. ^ In recent years, due to the increasing demand for color changes and image quality that liquid crystal displays can present, all the family players are trying to figure out what J & demand is. In general, in order to Enhance the liquid crystal display: the color change that can be presented and the demand for the image product f, the most direct idea must be long: the color gamut of the liquid crystal display (c〇l〇r gamut), and in order to improve the liquid crystal display In the gamut, in addition to starting with a color filter, the family will replace the LED backlight module with a higher color. The backlight module used for white light can effectively improve the color gamut of the liquid crystal display. Those having ordinary knowledge in the field of the invention should be familiar with the so-called color gamut is 5 201003217 jw/u/^ouEZlTW 26705twf.doc/n

It was developed by the International Lighting Association (C〇mmissi〇n Internati〇nal Yang CIE) in 1931, as shown in Figure j, and the color gamut defined by the association is area A in Figure 1. Basically, the gamut coordinates of any color are represented by the (χ, y) coordinates, and the area B of the triangle surrounded by the basic colors (ie red, green, and blue) on the gamut coordinates is ^ The color range of the appearance of the appearance of the job, the domain range also represents the color gamut of the liquid crystal display ^. Therefore, as long as the three-Shaw shape is formed, the domain B force σ is larger, and the color gamut of the liquid crystal display is wider, so that the color change and the image quality which the liquid crystal display can exhibit are improved. - In order to increase the range of the triangles formed by the triangles, the concept of a polygonal color gamut has been developed by the public, so please merge the references first, 1 and ® 2 'the concept of the color gamut The most straightforward way to interpret is to convert the three areas of the three basic colors (ie red, green and blue) into four basic colors (ie red, blue and two different wavelengths). Green) is enclosed in a quadrilateral area B. This way, not only can the color gamut of the crystal display 4 become wider, but also the color change and image quality that can be effectively exhibited by the liquid crystal display can be effectively improved. Hey, the concept of the polygon color gamut developed by the self-study has to be in the traditional light-emitting diode backlight module, which is different from the wavelength of the green light-emitting diode used in the past. The green group ^= pole body. That is to say, the improved light-emitting diode backlight mode door, = red light-emitting diode, blue light-emitting diode, and two kinds of skinless green light-emitting diodes ( For example, a green hair with a wavelength of 5 m and a wavelength of 53— Green LEDs. So will not be 6 201003217 ------EZ1TW 26705twf.doc/n two green LEDs of the same wavelength, mixed with red and blue two-color LEDs, The gamut of the quadrilateral is perceived by the human eye. However, according to the above disclosure, in order to achieve the color gamut of the liquid crystal display, a conventional LED backlight module must be added one more. The group is different from the green light-emitting diode of the wavelength of the green light-emitting diode used in the past, which will result in an increase in the overall design cost of the light-emitting diode backlight module.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a driving device and method for a light-emitting diode backlight module, which does not need to additionally add other basic color light-emitting diodes to the light-emitting diode backlight module. And only need to use the current light-emitting diode backlight module to make the color gamut of the liquid crystal display the purpose of the color gamut. Another object of the present invention is to provide a liquid crystal display, which is mainly provided by the above-mentioned light-emitting diode package, which is provided by the above-mentioned present invention, and which can be used to enhance the color change disk. Scene; ^ like quality. Based on the above and the object to be achieved, the present invention provides a illuminating body: a polar body backlighting drive, which comprises a control unit and a rotating unit. The ^ middle control unit alternately provides a first wide and a second control signal according to a switching signal. The driving unit tilts to the control unit, and the first control signal or the second control signal is used to drive at least the first-color LED in the backlight module to cause the The first-color light-emitting diode can exhibit at least two first colors of different wavelengths: 201003217^u/v/^o^ZlTW 26705twf.d〇c/n. In an embodiment of the invention, the driving unit further drives at least one second color LED in the LED backlight module according to the first control signal or the second control signal. Thereby, the second color light emitting diode can exhibit a second color of at least two different wavelengths. In an embodiment of the present invention, the driving unit drives the at least one third color LED in the LED backlight module according to the first control signal or the second control signal. The light-emitting diode of the third color is caused to exhibit a third color of at least two different wavelengths. From another point of view, the present invention provides a method for driving a light-emitting diode backlight module, which comprises the following steps: First, a first control signal and a second control signal are alternately provided according to a switching signal. And driving the at least one first color LED in the LED backlight module according to the first control signal or the second control signal, so that the first color LED can A first color of at least two different wavelengths is presented. In an embodiment of the present invention, the driving method of the LED backlight module further includes driving the LED backlight module according to the first control signal or the first control 5 At least one second color light-emitting diode in the group, such that the second color light-emitting diode can exhibit a second color of at least two different wavelengths; and according to the first control signal or the second The control signal drives the at least one third color light-emitting diode in the LED backlight module, so that the third color light-emitting body can exhibit the third color of at least two different wavelengths. 8 201003217 * v/w/^^j-»£Z1TW 26705twf.doc/n In the above-described embodiment of the invention, the switching signal is provided by a timing controller of the liquid crystal display. From another point of view, the present invention provides a liquid crystal display, comprising a liquid crystal display panel, a light-emitting triode backlight module, and a light-emitting diode backlight mode-moving device. The liquid crystal display panel is used to display an image plane. The LED backlight module is disposed under the liquid crystal display panel and has at least one first color, a second color, and a third color of the light emitting body for providing a surface light source required for the liquid crystal display panel. The LED backlight module driving device is coupled to the LED backlight module, and is configured to receive a switching signal, and respectively drive the first color according to a first control signal or a second control signal. The second color and the second color light emitting diode, so that the first color, the second color, and the third color light emitting diode can respectively exhibit at least two different wavelengths The first color, the second color, and the third color. In an embodiment of the invention, the liquid crystal display of the present invention further includes a timing controller coupled to the LED backlight module to provide the switching signal. In an embodiment of the invention, the LED backlight driving device includes a control unit and a driving unit. The control unit is coupled to the timing controller </ RTI> for alternately providing the first control signal and the second control signal according to the switching signal. The driving unit is coupled to the control unit and the light-emitting body backlight module, and respectively drives the first color, the second color, and the first control signal according to the first control signal or the first control signal a third color light emitting diode, wherein the first color, the 201003217 EZ1TW 26705twf.doc/n second color shirt and the third color light emitting diode can respectively exhibit at least two different wavelengths The first color, the second color, and the third color. In an embodiment of the invention, the LED backlight module driving device is built in the timing controller. In an embodiment of the invention described above, the first color is green, the second color is blue, and the second in the above-described embodiment of the invention has a plurality of different duty cycles. The pulse width modulation signal, and the second control signal is a pulse width modulation signal of the full duty cycle. The light emitting diode f auxiliary device and method provided by the invention are suitable for driving the current general light emitting diode backlight module, mainly because the green color two-color light emitting diode wafer material is a three-element semiconductor material ( The material property is blue-shifted by the piezoelectric effect, and the red-emitting diode is made of a four-element semiconductor material (the material property is S generated after heating, 'work shifting'), so red, green, and blue The three-color light-emitting diodes are different in phase, and the pulse width modulation signals driven by different duty cycles during the kneading process are driven by the two-phase different wavelengths to generate two-phase different wavelengths of red and green. The color gamut that the human eye perceives is a multi-deformation color gamut, that is, a color gamut of at least a quadrangle. Therefore, the driving device and method for the LED backlight module provided by the present invention do not need to additionally add other basic color LEDs to the conventional LED backlight module, and only need to adopt Nowadays, the general secret light-polar body back domain group can make the color gamut of the liquid crystal display reach the polygonal color gamut, thereby improving the color that the liquid crystal display can present 201003217 ...w"„uEZlTW 26705twf.d〇C/n Color change and image quality. The above and other objects, features and advantages of the present invention will become more apparent from the <RTIgt; [Embodiment] The main technical effect of the invention is to increase the color gamut of the liquid crystal display, so as to enhance the color change and image quality that the liquid crystal display can present, and reduce the manufacturing cost. The content will be directed to the technology of the case. A detailed description of the effects to be achieved is provided for the technical personnel of the relevant fields of the present invention. 3 is a block diagram of a liquid crystal display device 3 according to an embodiment of the present invention. Referring to FIG. 3, the liquid crystal display 300 includes a liquid crystal display panel (LCD panel) 301, a backlight backlight module (LED backHght module) 303, a light-emitting diode backlight module driving device 3〇5, and a timing controller (timing). Controller) 3〇7, gate driver (§ 攸 卜 light) 309, and source driver (s〇urce driver) 3U. The gate driver 309 is controlled by the timing controller 307 to turn on each column of pixels (not shown) in the liquid crystal display panel 301. The source driver 311 is also controlled by the timing controller 3〇7 to provide a corresponding gracious voltage (or voltage) to the column of the liquid crystal display panel 3〇1 that is turned on by the gate drive 309. In this way, when the source driver 3 j ^ τ ο is to provide the corresponding data voltage to the last column of the liquid crystal display panel 3 〇 1 , the LED backlight module 3 〇 3 will provide the liquid crystal display panel 301 The light source is such that the liquid crystal display panel 3〇1 displays the image 11 201003217Z] TW 2_ the face is displayed to the user. In this embodiment, the LED backlight module 3〇3 is disposed under the liquid crystal display panel 301, and has a first color (ie, green) of the LEDs G and a second color (ie, blue). The light-emitting diode B has a light-emitting diode R of - and a third color (ie, red). As described above, the illuminating polar moonlight module 303 is mainly used to provide the light source required for the liquid crystal display panel j, and the structure of the illuminating diode backlight module 303 and the conventional illuminating one-electrode backlight module The same, so I won't go into details here. In addition, in the present embodiment, after the source driver 3 provides a corresponding data voltage to each column of the liquid crystal display panel 3〇1, the LED backlight module 303 provides the required illumination. light source. Alternatively, when the source driver 311 supplies the data voltage to the pixels in the liquid crystal display panel 3〇1, the light-emitting diode backlight module 303 simultaneously supplies the light source required for the liquid crystal display panel 3〇j, which also causes the liquid crystal display. The panel 3〇1 displays the image plane. 4 is a block diagram of a light-emitting diode backlight module driving device 305 according to an embodiment of the invention. Referring to FIG. 3 and FIG. 4, the LED backlight module driving device 3〇5 of the embodiment is coupled to the LED module 303 and the timing controller 3〇7, and includes a control unit. 4〇1 and drive unit 兀403. The control unit 〇1 is coupled to the timing controller for receiving the switching signal ss provided by the timing controller 〇7 (for example, but not limited to the stroking STV), and alternately providing the first control. The signal CS1 and the second control signal CS2. In this embodiment, it is assumed that the control unit 4〇1 is on the liquid crystal display 3〇〇 201003217

When the first control signal CS1 is provided during the Nth picture period of the JlwuEZ ITW 26705twf.doc/n, the control unit 401 converts to 4 during the (N+1)th picture period of the liquid crystal display 300 to provide the second control signal CS2. But not limited to this. That is, the control unit 401 can also provide the second control signal CS2 during the Nth picture of the liquid crystal display 300, and switch to provide the first control during the (N+1)th face of the liquid crystal display. Signal CS1. Where N is a positive integer. In addition, the first control signal CS1 provided by the control unit 401 is provided with a pulse width modulation signal (pWM signal) having a plurality of different duty cycles, and is provided by the control unit 401. The second control signal CS2 is a pulse width modulation signal of a full duty cycle (fuii, such as cycle). Please continue to refer to FIG. 3 and FIG. 4, the driving unit 403 is coupled to the control unit 401 and the LED backlight. The module 303, according to the first control signal CS1 or the second control signal CS2 provided by the control unit 401, respectively drives the green, blue, and red color LEDs G, B, and R, thereby causing green , blue, red, three-color illuminating two shops G, B, R can now display at least two U different wavelengths of green, blue, red. To =, why green, blue, red three-color LEDs G, B, When R is driven by the pulse width modulation signal of different duty cycles, the three will generate two-phase different wavelengths of green, blue, and red during the two-phase different planes of liquid=display=300. Specific reasons and experimental data for the present invention The first explanation is that the green and blue LEDs of G and B (P) are described as two-element semiconductor materials, such as indium gallium nitride 13 201003217 .../wiuuEZlTW 26705twf.doc/ n (InGaN) 'The characteristics of such a triterpene semiconductor material are blue-shifted by the piezoelectric effect', that is, the light emitted by it is bluish. The other two red-emitting diode R wafer materials Generally, it is a four-element semiconductor material, such as aluminum indium gallium phosphide (AilnGaP), which has a red-shift phenomenon after being heated. The material of G, B, and R itself is different. 'This embodiment will set the average currents of driving green, blue, and red LEDs, G, B, and R to 20 mA and 3 mA. And the green, blue and red LEDs GB and R are subject to a full responsibility cycle (ie 100% duty cycle), 8〇% duty cycle '60% responsibility cycle, 40% duty cycle' And 2〇% duty cycle pulse width modulation signal driven condition The experimental data as shown in Table 1. Red light two green light two blue light two wavelengths (nm) polar body R body G body B average current (mA) average current (mA) average current (mA) 20 30 20 30 20 30 100 632.09 632.45 523.71 521.33 458.07 456.94 PWM 80 632.17 632.48 522.79 521.53 457.05 456.41 Responsibility week 60 632.11 632.87 521.29 520.4 456.81 456.01 period (%) 40 632.22 633.14 519.82 519.86 456.07 454.43 20 632.77 633.75 517.63 518.22 453.98 453.68 Table 1 It should be easy to see from Table 1 'When driving Green LED II 14 201003217 i ” EZITW 26705twf.doc/n The average current is 2GmA, and the green LED is driven by the pulse width modulation signal of the full duty cycle (ie 100% residual period). Next, the wavelength of the green light-emitting diode G is 523 71 nm. In addition, when the average current of driving the green light-emitting diode G is also 2QmA, the green light-emitting diode G is employed. Under the condition of pulse width modulation, the wavelength of the green light-emitting diode μ will obviously become 517.63 nm. Similarly, when driving blue light The average current of the diode B is 20 mA' and the blue light-emitting diode B is driven by the pulse width modulation signal of the full duty cycle, and the wavelength of the light-emitting diode (4) is 458.07 nm. In addition, when the average current of driving the blue light-emitting diode B is also 20 mA, the blue light-emitting diode B is driven by the pulse width modulation signal of 2%% duty cycle, at this time, blue The wavelength exhibited by the light-emitting diode B becomes apparently 453 98 nm.

Similarly, when the average current of driving the red LED R is 20 mA, and the red LED R is driven by the pulse width modulation signal of the full duty cycle, the color LED &amp; The wavelength presented is 632.09 nm. In addition, when the average current of driving the red LED R is also 20 mA, the red LED R is driven by the pulse width modulation signal of the 2 〇 % duty cycle, at this time, the red LED The wavelength exhibited by the body R obviously becomes 632.77 nm. In addition, the matching of the remaining driving conditions of the green, blue and red LEDs G, B, and R can be clearly seen from the table, so those having ordinary knowledge in the field of the invention should be able to This example is exemplified in the paragraph and 15 201003217 iw/w, ^.〇uEZ1TW 26705twf.doc/n is introduced, so it will not be repeated here. From the above, it has been explained that the green and blue two-color LEDs G and b have a blue shift due to the effect of the electric and electric effects, while the red light-emitting diodes are red-shifted compared with the influence of the heat of the valley. Therefore, the experimental data recorded in Table 1 of the present embodiment should be easily seen, and the green and blue light-emitting diodes G and B are driven by the pulse width modulation signals of different duty cycles.

The two-phase different wavelengths generated during the two-phase different planes of the liquid crystal display 300 are apparent to the red light-emitting diode R. Therefore, when the green, blue, and red LEDs G, B, and R of the LED backlight module 3〇3 of the present embodiment are driven by pulse width modulation signals of different duty cycles, At the same time, the three will produce two-phase different wavelengths of green, blue, and red during the two-phase different planes of the liquid crystal display. After the color mixture is mixed, the color gamut that the human eye perceives can be made into the evening. In the embodiment, in the preferred embodiment, the color gamut of the liquid crystal display 300 can at least reach the gamut of the pentagon, which is shown as a pentagon in FIG. Area B" is shown. What is more worth mentioning here is that, in order to make the green, blue and red three-color LEDs G, B, and R are driven by the pulse width modulation of different duty cycles, they are different from the liquid crystal display. Under the condition that the brightness of the two-phase different screens is the same, the LED backlight unit driving device 305 of the embodiment is based on the green, blue and red LEDs G, Β R is adjusted by the average power j driven by the pulse width modulation signal of the full responsibility cycle to adjust multiple non-full liability cycles (eg, 8〇% duty cycle, 6〇 duty cycle, 40% duty cycle, and 2〇) % duty cycle) pulse width 16 201003217』Z1TW 26705twf.doc/n The drive current of the modulating signal 'has reached the pulse of different duty cycles of green, blue and red LEDs G, B and R After the wave width modulation signal is driven, the brightness exhibited during the two different screens of the liquid crystal display 3 还会 will be the same. 6 is a waveform of the first control signal csi and the second control signal CS2 provided by the LED backlight module driving device 305 of the present invention during the two different phases of the liquid crystal display 3? Timing diagram. Please refer to FIG. 6 when the green, blue, and red LEDs g, B, and R are subjected to the second control signal CS2 during the Nth face of the liquid crystal display device 300 (that is, the pulse of the full duty cycle) The wave width modulation signal) is 20mA after the driving, and the green, blue, and red LEDs 〇, B, and R must be subjected to the (N+1)th surface of the liquid crystal display 300. When a control signal CS1 (that is, a pulse width modulation signal of 20% duty cycle) is driven, the LED backlight module driving device 3〇5 will emit green, blue and red light-emitting diodes. G, B, and R are adjusted to l〇0mA by the driving current of the pulse width of the 20% duty cycle during the (N+1)th surface of the liquid crystal display (3+1), thereby making green, blue, and red The three-color LEDs G, B, and R are driven by the pulse width modulation signal of the full responsibility cycle and the 20% duty cycle during the Nth and (N+1)th periods of the liquid crystal display 300. The average current is still 20mA, so the green, blue, and red LEDs G, B, and R are subjected to pulse widths of different duty cycles. After the signal is driven, the brightness exhibited during the two-phase different planes of the liquid crystal display 300 will be the same. Eighty-one, although the explanation according to the above embodiment is known, the light-emitting diode 17 201003217

The tZITW 26705 twf.doc/n body backlight module driving device 305 is a system independent of the liquid crystal display 300, but is not limited thereto according to the spirit of the present invention. In other words, the LED backlight module driving device 305 of the above embodiment is built in the timing controller 307 in another embodiment of the present invention, thereby achieving the technical effects as desired in the above embodiments. . In this regard, those having ordinary knowledge in the field of the present invention should be able to implement the embodiment in which the LED backlight module driving device 305 is built in the timing controller 307 according to the teachings of the above embodiments. It will not be repeated. In addition, since the current LED backlight module is often provided with a white light-emitting diode, the wafer material of the white light-emitting diode has a three-element semiconductor material and a small portion of the phosphor ( Phosphorescently, the light-emitting diode backlight module driving device 305 of the present invention can still drive a light-emitting diode backlight module equipped with a white light-emitting diode, so that the liquid crystal display to be applied to the polygonal color gamut The purpose. Based on the disclosure of the above embodiments, a method for driving a backlight diode module will be incorporated below for those skilled in the relevant art to which the present invention pertains. FIG. 7 is a flow chart showing a driving method of a light-emitting diode backlight module according to an embodiment of the invention. Referring to FIG. 7, the driving method of the LED backlight module of the present embodiment includes the following steps: First, as described in step S701, a first control signal and a second control signal are alternately provided according to a switching signal. In this embodiment, the switching signal is provided by the timing control of the liquid crystal display. 18 2010032LZ EZ1TW 26705twf.doc/n Next, as described in step S703, driving at least one first color (eg, green) in the LED backlight module according to the first control signal or the second control signal The light emitting diode is such that the first color (ie, green) light emitting diode can exhibit a first color (ie, green) of at least two different wavelengths. In this embodiment, the first control signal is a pulse width modulation signal having a plurality of different duty cycles, and the second control signal is a pulse width modulation signal of a full duty cycle. In addition, the driving method of the LED backlight module provided in this embodiment is not limited to driving only the green light-emitting diode in the LED backlight module. More specifically, the driving method of the LED backlight module of the present invention can further drive at least one second of the LED backlight module according to the first control signal or the second control signal. A light-emitting diode of color (for example, blue), whereby the second color (ie, blue) light-emitting diode can exhibit a second color of at least two different wavelengths. Similarly, the driving method of the LED backlight module of the present invention can also drive at least one third color in the LED backlight module according to the first control signal or the second control signal ( For example, a red light emitting diode, whereby the third color (ie, red) light emitting diode can exhibit a third color (ie, red) of at least two different wavelengths. The gas T and the light-emitting diode backlight module driving device and method are suitable for driving the current general-purpose LED backlight module, mainly because of the green and blue two-color LED The material of the wafer is a three-element semiconductor material (the material property is blue-shifted by the piezoelectric effect), and the film material of the red LED is 19 201003217 iu/u/z.〇jjEZ1TW 26705twf.doc/n Four-element semiconductor material (the material property is red-shifted after being heated), so when the red, green, and blue light-emitting ones are in different dissimilar periods, the pulse width is adjusted by different duty cycles. At the same time, the two will produce two-phase different wavelengths of red, green, and blue during the two-phase dissimilar planes, thereby re-passing the color mixture, so that the color gamut that the human eye perceives is multi-deformed. The color gamut, which is the color gamut above at least the quadrilateral. f is also the case, the light-emitting diode backlight module drive provided by the invention

The moving device and method do not need to additionally add other basic color light emitting diodes to the current general LED backlight module, and only need to adopt the light emitting diode backlight module to make the liquid crystal display = two J side The purpose of the color gamut can be used to enhance the color change and image quality of the liquid crystal display. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention to any skilled person, and may be modified and modified without departing from the spirit and scope of the invention. The scope of the present invention is defined by the scope of the appended claims. [Simple description of the diagram] Figure 1 shows a color gamut diagram developed by the International Lighting Association (CIE) in 1931.疋 ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί 采用 采用 采用 采用 采用 采用 采用 采用 采用 采用 采用 采用 采用 采用 采用 采用 采用

JEZ1TW 26705twf.doc/n FIG. 4 is a block diagram showing a light-emitting two-way device according to an embodiment of the present invention. Fig. 5 is a view showing a color gamut of a liquid crystal display according to an embodiment of the present invention. 6 is a waveform timing diagram of a first control signal and a control signal provided during a two-phase difference between the two different screens of the liquid crystal display according to an embodiment of the present invention. FIG. 7 is a flow chart showing a driving method of a light-emitting diode backlight module according to an embodiment of the invention.

[Main component symbol description] A, B, B' 'B": color gamut range 300: liquid crystal display 301. liquid crystal display panel 303: light-emitting diode backlight module 305: light-emitting diode backlight module driving device 307: Timing controller 309: gate driver

The body backlight driver 311: the source driver 401: the control unit 403: the driving unit SS: the switching signals CS1, CS2: the first and second control signals S701 to S703: the LED backlight module according to an embodiment of the invention Group Drive Method Flowchart Steps, 21

Claims (1)

201003217 --------hZITW 26705twf.doc/n X. Patent application scope: 1. A light-emitting diode backlight module driving device, including a control unit, alternately providing a first according to a switching signal a control signal and a second control signal; and a driving unit 70 coupled to the control unit, and driving the LED backlight module according to one of the first control signal and the second control signal The at least one first color of the light emitting diode, thereby causing the first color (the light emitting diode to exhibit the first color of at least two different wavelengths. 2. The illuminating two according to claim 1 The driving unit of the backlight unit, wherein the driving unit drives the at least one second color of the LED in the backlight module according to the first control signal or the first control δ ΐ , The light-emitting diode of the second color is capable of exhibiting the second color of the second color. The light-emitting diode backlight module driving device according to claim 2, wherein the driving single And driving the at least one third color of the LED in the LED backlight module according to the first control signal or the t-control signal, so that the LED of the third color can exhibit at least The illuminating diode backlight module driving device of the third aspect of the invention, wherein the first color is green and the second color is blue, and The light-emitting diode backlight module-driven device according to claim 1, wherein the first control signal is a pulse width modulation having a plurality of different duty cycles. Signal, and the second control signal is a full responsibility week 22 201003217 1 v/v/^ulJ£ZlTW 26705twf, doc/n period pulse width modulation signal. 6. As described in claim 1 The LED backlight module driving device 'where the switching signal is provided by the liquid crystal display-timer'. - 7. A driving method of the LED backlight module, comprising the following steps: according to a switching signal alternately Providing a first control signal and a second control signal; and (in accordance with the first control signal and the second control signal, driving the at least one first color of the light-emitting diode backlight module The polar body, so that the first color LED can exhibit the first color of at least two different wavelengths. 8. The method for driving the LED backlight module as described in claim 7 The method includes the following steps: driving, according to the first control signal or the second control signal, at least the second color of the LED of the backlight of the LED backlight, so that the LED of the second color can be Presenting at least two different wavelengths of the second color; and driving the at least one third color LED in the light-emitting one-pole light-emitting module according to the first control signal or the second control signal So that the third color of the light emitting diode can exhibit the third color of at least two different wavelengths. 9. The method of driving a light-emitting diode backlight module according to claim 8, wherein the first color is green, the second color is blue, and the second color is red. 23 201003217 ...EZ1TW 26705twf.doc/n • The light-emitting diode backlight module according to claim 7 of the patent application, and the driving method 'the towel--(four) 峨 is a pulse width having a different duty cycle The modulation signal is modulated, and the second control signal is a pulse width modulation signal of a full duty cycle. 11. The light-emitting diode backlight module of claim 7, wherein the towel replacement signal is provided by a liquid crystal display device. 12. A liquid crystal display comprising: - a liquid crystal display panel for displaying an image plane; - a light emitting diode backlight module 'disposed under the liquid crystal display panel" and having at least a - color - The second color and the third color of the hair-pole body are used to provide the surface light source required for the liquid crystal display panel; North ^f optical diode back wire group driving device, _ connected to the light emitting diode: first,, and, for receiving - switching signals, and according to the "first control signal = brother two control signals to drive the respective The first color, the second color, and the light-emitting diode of the second color shirt, so that the first color-wave three-color light-emitting diode can present at least two; the weight is not; the long one- Color, the second color, and the third color. The liquid crystal display described in claim 12 of the patent scope is further provided with a T-sequence control to provide a tactile number. Actuator 'Like L4. If you apply for the paste (4) 13 items of liquid crystal wheel, Lizhong ~ Maoguang - polar body backlight module drive device includes: ', 24 ^ EZITW 26705twf doc / n 201003217, and the timing controller ' And according to the switching signal and the second control signal; and έ (4) early 70 and the LED backlight 槿•π;: control signal or the second control signal each = i: ir The color and the second color of the illuminating dipole Zhao, = the material - the color, the f two colors and the first, the color and the third color. The first color of the n-wavelength, the second 15. The scope of the third aspect of the patent application is 曰 _ „ backlight module drive scale inside the second 16 16. In the patent scope 12, control (10). The first control The signal is 1 with a majority of ^^ liquid θθ display, wherein the variable signal, and the second control signal pulse width modulation signal. Bellow Zhou Gong pulse width adjustment 17. If the patent scope is 12 U = : color is green, the second color is blue i: 25