Patent Publication Number: US-2013235089-A1

Title: 3-D Displaying Device And Method For Controlling Displaying

Description:
FIELD OF THE INVENTION 
     The present invention relates to a technology of displaying device, and more particularly to a 3-D displaying device and a method for controlling the displaying. 
     BACKGROUND OF THE INVENTION 
     In recent years, there is a great leap on the 3-D displaying technology, and it has become a hop spot of research. The 3-D displaying technology can be greatly implemented in the fields of the medical, commercial, military, exhibition, and game. In addition, it has become more and more important to these fields. Referring to  FIG. 1 , an existing 3-D displaying device is shown. This conventional 3-D displaying device includes a liquid crystal display  10 , and a pair of shuttle glasses  13 . The liquid crystal display  10  generally includes a liquid crystal display panel  11 , and a backlight module  12 . The liquid crystal display panel  11  can display a left-eye-picture and a right-eye-picture alternatively with the illumination from the backlight module  12 . 
     The shuttle glasses include a left lens  131 , and a right lens  132 . Each of the left lens  131  and the right lens  132  is incorporated with two polarizers (not shown in this Figure), and a layer of liquid crystal (not shown) disposed therebetween. When the operating voltage is applied to the liquid crystal layer alternatively, the left lens  131  and the right lens  132  can be turned on and off respectively to the voltage applied thereto. During the displaying, when the display panel  11  projects a left-eye-picture, the left lens  131  is turned on, while the right lens  132  is turned off. As a result, the left-eye-picture is transmitted to the left eye of the viewer, while what the viewer sees through his right eye is black. Alternatively, when the liquid display panel  11  shows a right-eye-picture, then the left lens  131  is shut off, and the right lens  132  is turned on. Meanwhile, a right-eye-picture is transmitted to the right eye of the viewer, and what the left eye sees is black. By this arrangement, the left eye and right eye of the viewer receives a separated left-eye-picture and a right-eye-picture respectively, and our brain will configure those two pictures into a 3-D image. 
     Referring to  FIG. 2 , which is an operational clock or timing chart for the 3-D displaying device shown in  FIG. 1 . As shown in  FIG. 2 , the vertical axis represents the upper and lower positions of the liquid crystal display  11 , and the horizontal axis represents time. Based on the existing technology, the backlight module  12  is divided into a plurality of horizontal sectors from top to bottom. Accordingly, the scanning sequences of the backlight module  12  starts from the top to bottom sequentially so as to control the on and off each horizontal sector. As shown in  FIG. 1 , the backlight module  12  is divided into S 1 , S 2 , S 3 , S 4 , and S 5 , totally five horizontal sectors. On the other hand, the liquid display panel  11  shows the left-eye-picture and the right-eye-picture alternatively. The timing for the left-eye-picture is T 1 , and the timing for the right-eye-picture is T 2 . T 1  and T 2  each represents a timing of a single frame. When the clock starts running, the signal or driving signal is sent to the liquid display panel  11  respect to those horizontal sectors from top to bottom. Once the pixel of the liquid crystal display is empowered by the driving voltage, it starts to react accordingly. As a result, because of the design of the pixel and the delay of the crystal, it takes a certain period of time, L 0 , to reach a stabilized condition. As the scanning sequence starts from S 1 , S 2 , S 3 , S 4 , and S 5 , and the turned off time of the left lens  131  is delayed, and the driving signal in horizontal sector S 1  has been changed from the left-eye-picture into right-eye-picture. Because of the reacting time L 0 , it creates an issue as both the left-eye-picture and the right-eye-picture are co-existed in the horizontal sector S 1 . As a result, a ghosting image will be seen from sector S 1 . On the other hand, since the left lens  131  opens a little bit earlier, and it also supplies driving signal to horizontal sectors S 1 , S 2 , S 3 , S 4 , and S 5 . As mentioned above, there is a reacting time L 0  on the pixels of the liquid crystal, those five sectors S 1 , S 2 , S 3 , S 4  and S 5  will be effected by the latest right-eye-picture more or less. As a result, a ghosting image will be seen. 
     Since the crosstalk between the left eye signal and the right eye signal, it creates a ghosting image. This ghosting image will surely affect the 3-D effect negatively. 
     Accordingly, there is a need to provide a novel 3-D displaying device, and a method for controlling. 
     SUMMARY OF THE INVENTION 
     The main technical issue in which the present invention intends to address is to provide a 3-D displaying device and a method of controlling so as to reduce a so called ghosting image resulted from crosstalk so as to upgrade the 3-D displaying effects. 
     In order to resolve the technical issue mentioned above, the present invention provides a 3-D displaying device, comprises a liquid crystal displaying panel, alternatively displaying a left-eye-picture and a right-eye picture. The liquid crystal display is divided into a plurality of displaying sections starting from sides to a center thereof. The plurality of displaying sections is driven based on a scanning sequence starting from sides to the center. A plurality of backlight units each is arranged with respect to a corresponding displaying section. The duration of turn-on of each of the backlight units remaining same, and is turned on in a sequence such that each of the backlight units is turned on only when the corresponding displaying section receives a driving signal of a picture, and the pixels of the displaying section reacts, each of the backlight units is turned off only when the displaying sections receive another driving signal of a picture. Wherein the plurality of displaying sections includes a central displaying section, an outmost displaying section, and a transitional displaying section located between the central displaying section and the outmost displaying section, wherein a displaying of a picture is scanned by the sequence: scanning the outmost displaying section, then scanning the transitional section, and finally, scanning the central displaying section. 
     Wherein that the 3-D device includes a shuttle glasses configured with a left lens and a right lens turned on alternatively so as to transfer a left-eye-picture and a right-eye-picture alternatively. 
     In order to address the above-mentioned technical issues, according to another embodiment of the present invention, a 3-D displaying device is provided and characterized in that the 3-D device comprises a liquid crystal panel alternatively displaying a left-eye-picture and a right-eye-picture. The liquid crystal panel is divided into a plurality of displaying sections starting from sides to a center thereof; the plurality of displaying sections is driven according to a scanning sequence starting from the sides to the center thereof. A plurality of backlight units each is arranged to a corresponding displaying section. The plurality of units is turned on in sequence such that each of the backlight units is turned on only when the corresponding displaying sections receives a driving signal of a picture, and after corresponding pixels of a liquid crystal of the panel is responded, and is turned off only when the displaying section receives a driving signal of next picture. 
     Wherein the plurality of sections includes a central section, an outmost section, and a transitional section located therebetween. A picture is displayed with a scanning sequence starting from firstly driving the outmost section, and then driving the transitional section, and finally driving the central section. 
     Wherein the plurality of backlight units have identical duration of turn-on and running time. 
     Wherein the displaying device includes a shuttle glasses configured with a left lens and a right lens turned on alternatively so as to transfer a left-eye-picture and a right-eye-picture alternatively. 
     Wherein the left lens is turned on starting from the pixels of the firstly scanned displaying section of the liquid crystal displaying panel receives a driving signal for displaying a left-eye-picture, and reaches to a stabilized condition, and is turned off when the pixels of the lastly scanned displaying section of the display starts to receiving a driving signal of the right-eye-picture; and the right lens is turned on starting from the pixels of the firstly scanned displaying section of the liquid crystal displaying panel receives a driving signal for displaying a right-eye-picture, and reaches to a stabilized condition, and is turned off when the pixels of the lastly scanned displaying section of the display starts to receiving a driving signal of the left-eye-picture. 
     In order to resolve the technical issue mentioned above, a method for controlling 3-D displaying device is provided and characterized in that the steps includes a step of controlling the liquid crystal displaying panel to display a left-eye-picture and a right-eye-picture alternatively. Wherein the liquid crystal displaying panel is divided into a plurality of displaying sections starting from sides to a center thereof, the plurality of displaying sections being driven according to a scanning sequence starting from the sides to the center thereof. A step of providing a plurality of backlight units is provided and each is arranged to a corresponding displaying section. The plurality of units are turned on in sequence such that each of the backlight units is turned on only when the corresponding displaying sections receives a driving signal of a picture, and after corresponding pixels of a liquid crystal of the panel is responded, and is turned off only when the displaying section receives a driving signal of next picture. 
     Wherein the plurality of sections includes a central section, an outmost section, and a transitional section located therebetween, a picture being displayed with a scanning sequence starting from firstly driving the outmost section, and then driving the transitional section, and finally driving the central section. 
     Wherein the duration of turn-on and running time of each of the plurality of backlight units remains the same. 
     Wherein the method of controlling further comprises the step of controlling the duration of turn-on of the left lens and right lens alternatively so as to transfer a left-eye-picture and a right-eye-picture alternatively. 
     Wherein the left lens is turned on starting from the pixels of the firstly scanned displaying section of the liquid crystal displaying panel receives a driving signal for displaying a left-eye-picture, and reaches to a stabilized condition, and is turned off when the pixels of the lastly scanned displaying section of the display starts to receiving a driving signal of the right-eye-picture; and the right lens is turned on starting from the pixels of the firstly scanned displaying section of the liquid crystal displaying panel receives a driving signal for displaying a right-eye-picture, and reaches to a stabilized condition, and is turned off when the pixels of the lastly scanned displaying section of the display starts to receiving a driving signal of the left-eye-picture. 
     The following advantages of the present invention can be achieved. As compared with the existing technology, in a 3-D displaying device and a method for controlling provided by the present invention, the liquid crystal displaying panel is configured with a plurality of displaying sections which are driven and scanned from sides to a center thereof. A plurality of backlight module is provided and also controlled with respect to the scanning sequence of the displaying device in a way that it opens from sides to center thereof. Each of the backlight units is turned on only when the corresponding displaying section receives a driving signal of a picture, and the pixels of the displaying section reacts, each of the backlight units is turned off only when the displaying sections receive another driving signal of a picture. With this arrangement, the duration of turn-on and running time of the backlight units is increased so as to reduce the crosstalk of the displaying device, and the ghosting image is reduced. The displaying effect is increased, and the substantial experience of the viewer is upgraded. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In order clearly explain the technology of the embodiment illustrated in the present invention, a brief and concise description will be given along with the accompanied drawings. Apparently, the embodiments illustrated in the drawings are merely some typical embodiments and which can be readily modified by the skilled in the art without any additional laborious efforts so as to transform them into other drawings. Wherein 
         FIG. 1  is an illustrated perspective view of a prior art 3-D displaying device; 
         FIG. 2  is an operational timing chart of the 3-D displaying device made in accordance with the present invention; 
         FIG. 3  is another preferred embodiment of a 3-D displaying device made in accordance with the present invention; 
         FIG. 4  is an operational timing chart of the 3-D displaying device illustrated in  FIG. 3 ; and 
         FIG. 5  is a flow chart of a controlling method of the 3-D displaying device made according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     Referring to  FIG. 3  in which a preferred embodiment of a 3-D displaying device made in according to the present invention is shown. As shown, the 3-D displaying device in accordance to the present invention includes a liquid crystal display  20 , and a shuttle glasses  23 . The liquid crystal display  20  further includes a liquid crystal displaying panel  21  and a backlight module  22 . The liquid crystal displaying panel  21  is disposed between the backlight module  22  and the shuttle glasses  23 , and is illuminated by the backlight module  22 . 
     The liquid crystal displaying panel  21  illustrates a left-eye-picture and a right-eye-picture alternatively. The display panel  21  is divided into a plurality of displaying sections starting from sides to a center thereof. According to the present invention, the liquid crystal displaying panel  21  is divided into totally five (5) sections S 11 , S 12 , S 13 , S 14 , and S 15 . Displaying sections S 11  and S 15  are located at outmost area of the liquid crystal displaying panel  21 , while displaying section S 13  is located at a center of the liquid crystal displaying panel  21 , and displaying sections S 12  and S 14  are located therebetween. It can also be referred to as transitional displaying sections. 
     The scanning method of the liquid crystal displaying panel  21  starts from the outmost sections, and then to the center sequentially so as to drive the displaying sections S 11 , S 12 , S 13 , S 14  and S 15 . Accordingly, the displaying sections S 11  and S 15  are driven firstly, and then displaying sections S 12  and S 14  are driven, and finally, displaying section S 13  is driven. 
     The backlight module  22  includes a plurality of backlight units corresponding to each of the displaying sections S 11 , S 12 , S 13 , S 14  and S 15  of the liquid crystal displaying panel  21 . In the preferable embodiment, the backlight module  22  is configured by backlight units  51 , S 2 , S 3 , S 4  and S 5 , which are each assigned to align with a corresponding displaying sections S 11 , S 12 , S 13 , S 14  and S 15 . The timing of turn-on of the backlight units S 1 , S 2 , S 3 , S 4  and S 5  is set to synchronized to the scanning sequence of the displaying sections S 11 ,  512 ,  513 ,  514 , and  515 , i.e. the backlight units S 1  and S 15  are turned on firstly, then the backlight units S 2  and S 4  are turned, and finally, the central backlight unit S 3  is turned on. This is to make sure that these backlight units S 1 -S 5  are turned on only when the corresponding displaying sections S 11 -S 15  receive a driving signal, and turned off only when the displaying sections S 11 -S 15  start to receive another driving signal. On the other hand, the duration between turn-on and turn-off each of the backlight units are remained the same. 
     The shuttle glasses  23  includes a left lens  231  and a right lens  232 , and which is synchronized with the liquid crystal displaying panel  21  by means of infra red signal, or blue tooth, or other communication. The left lens  231  and the right lens  232  can be turned on synchronically with respect to the liquid crystal displaying panel  21  so as to view the left-eye-picture and the right-eye-picture. 
     Referring to  FIG. 4 , which is a clock timing chart of the liquid crystal displaying panel shown in  FIG. 3 . As shown in  FIG. 4 , the liquid crystal displaying panel  41  displays the left-eye-picture and the right-eye-picture. T 1  is the displaying duration of left-eye-picture, and T 2  is the displaying duration of right-eye-picture. Each of the T 1  and T 2  represents the duration of the picture shown. 
     During the T 1  of the left-eye-picture, the displaying sections S 11  and S 15  are driven firstly, and only when the displaying sections S 11  and S 15  response, the backlight units S 1  and S 5  are turned on. The backlight units S 1  and S 5  are turned off only when the displaying sections S 11  and S 15  start to receive the right-eye-picture. Afterword, the transitional displaying sections S 12  and S 14  are driven. The backlight units S 2  and S 4  are turned only when the displaying sections S 12  and S 14  response. The backlight units S 2  and S 4  are turned off only when the displaying sections S 12  and S 14  start to receive the right-eye-picture. Lastly, the central displaying section S 13  is driven, and the backlight unit S 3  is turned on only when the displaying section S 3  responses. The backlight unit S 3  is turned off only when the displaying section S 13  starts to receive the right-eye-picture. The response time of the pixel of liquid crystal is L. 
     The turn-on time of the left lens  231  starts when the pixels of the firstly scanned displaying sections S 11  and S 15  of the liquid crystal displaying panel  21  receive the driving signal of the left-eye-picture, and reaches a stabled condition. The ending of the turn-on of the left lens  231  is when the pixels of the displaying sections S 13  receive the driving signal of the right-eye-picture. The turn-on time of the right lens  232  starts when the pixels of the firstly scanned displaying sections S 11  and S 15  of the liquid crystal displaying panel  21  receive the driving signal of the right-eye-picture, and reaches a stabilized condition. The ending of the turn-on of the right lens  232  is when the pixels of the displaying sections S 13  receive the driving signal of the left-eye-picture. 
     As compared to the technology of the existing 3-D displaying device, the scanning sequence of the liquid crystal liquid crystal displaying panel  21  of the present invention starts from the sides to center and then drives the displaying sections S 11 , S 12 , S 13 , S 14 , and S 15  such that the scanning duration of the liquid crystal displaying panel  21  is reduced. Meanwhile, the duration of turn-on of the backlight units  51 , S 2 , S 3 , S 4  and S 5  are increased. On the other hand, the backlight units  51 , S 2 , S 3 , S 4  and S 5  are turned on only when the pixels of the liquid crystal response. This arrangement maximizes the duration of turn-on time of each of the backlight units S 1 , S 2 , S 3 , S 4  and S 5 . With the advantages, the driving current of the 3-D displaying device in accordance with the present can be effectively reduced such that the cross-talk is lowered. With the reduced cross-talk, the ghosting image is also lowered. As a result, the present invention uses the lowest power to achieve the maximized quality improvement of the 3-D displaying device. The customer can readily have a brand new effect. 
     It should be noted that in the above description, the liquid crystal displaying device  21  and the backlight module  22  are both divided into five (5) different sections and units for illustration. However, it can be readily appreciated that the liquid crystal displaying panel  21  can be divided into even number, for example, it can be divided into six (6) sections, such as S 21 , S 22 , S 23 , S 24 , S 25 , and S 26 . Among those six sections, sections S 21  and  26  are the outmost sections, sections S 22  and S 25  are transitional sections, and sections  23  and  24  are the central sections. 
     With the same principle, the backlight module  22  can be also divided into totally six (6) backlight units corresponding to those six (6) displaying sections S 21 , S 22 , S 23 , S 24 , S 25  and S 26 . On the other hand, when the liquid crystal displaying panel  21  and the backlight module  22  are both divided into six (6) different sections and units, their scanning method and driving method are remained the same as that divided into five (5). As a result, no detailed description is given. 
     Referring to  FIG. 5  which is a flow chart showing a controlling method of the 3-D displaying device made in accordance with the present invention. As shown in  FIG. 5 , the controlling method of the 3-D displaying device made in accordance with the present invention comprises the following steps. 
     Step  501 : controlling the liquid crystal displaying panel  21  to display a left-eye-picture and a right-eye-picture alternatively; wherein the liquid crystal displaying panel is divided into a plurality of displaying sections starting from sides to a center thereof, the plurality of displaying sections are driven according to a scanning sequence starting from the sides to the center thereof. 
     Step  502 : providing a plurality of backlight units and each is arranged with respect to a corresponding displaying section. The plurality of units are turned on in sequence such that each of the backlight units is turned on only when the corresponding displaying sections receives a driving signal of a picture, and after corresponding pixels of a liquid crystal of the panel are responded, and is turned off only when the displaying section receives a driving signal of next picture. 
     Step  503 : Controlling the duration of turn-on of the left lens  231  and right lens  232  of the shuttle glasses  23  alternatively so as to transfer a left-eye-picture and a right-eye-picture alternatively. 
     Details of those above-described steps can be referred to the detailed description of preferred embodiments. As a result, no details will be given. 
     In conclusion, in a 3-D displaying device and a method for controlling provided by the present invention, the liquid crystal displaying panel is configured with a plurality of displaying sections which are driven and scanned from sides to a center thereof. As a result, it reduces the scanning time of the liquid crystal displaying device. In addition, each of the backlight units is turned on only when the corresponding displaying section receives a driving signal of a picture, and the pixels of the displaying section reacts, each of the backlight units is turned off only when the displaying sections receive another driving signal of a picture. With this arrangement, the duration of turn-on and running time of the backlight units is increased so as to reduce the crosstalk of the displaying device, and the ghosting image is reduced. The displaying effect is increased, and the substantial experience of the viewer is upgraded. 
     The description above is merely some preferable embodiments of the present invention, while is not intended to limit the implementation of the present invention. Any alternation and/or modifications based on the descriptions and drawings are to be construed as equivalent under the spirit of the present invention, and should be covered by the claims set forth below. On the other hand, even direct and indirect implementation of the present invention to other technology field, should still be covered by the claims as set forth below.