TW201234338A - Operating method of optical touch display apparatus - Google Patents

Abstract

An operating method of an optical touch display apparatus including an optical touch module and a display including a backlight module and a display panel is provided. The method includes the following steps. In a touch scanning period, the optical touch module is active to detect a touch point. In a frame display period, the backlight module is active to display a frame. Where the frame display is not overlapped with the touch scanning period. Therefore, the effect of a light source from the backlight module on the optical touch module can be avoided.

Description

201234338

107203ITW 36834twf.doc/I VI. Description of the Invention: [Technical Field of the Invention] The invention relates to an operation method and particularly relates to a method of operating a light dry touch display device. [Prior Art]

With the advancement of optoelectronic technology, I use the mouse to control the computer and the screen. The way of the object can not meet the needs of the user. Therefore, the more humanized method than the mouse control is gradually developed. In these humanized methods, the finger manipulation is closest to the human operating habits. In the case of a conventional notebook computer, the cursor is usually controlled by a touchpad and trackp〇int located beside the button. However, for the average user, using the touchpad or track points next to the buttons to control the cursor may be less flexible than using a slippery surface, and the touch panel disposed on the screen can solve such problems. The current touch panel design can be roughly divided into resistive, capacitor ^, optical, sonic, and electromagnetic. In the case of an optical touch display device, a display and an optical touch module are generally included, wherein the display includes a backlight module, a group and a display panel. The optical touch panel detects whether the supplied light is blocked to determine whether the user is touching or not, and determines the position of the user according to the position of the blocked light. However, since the backlight module of the display also provides light, the optical touch module is affected by the light provided by the backlight module, and the optical touch module cannot correctly determine whether the user performs the operation. Touch.

201234338 lU/ZUiliW 36834twf.doc/I SUMMARY OF THE INVENTION The present invention provides an operation method of an optical touch display device, which can prevent the light source of the backlight module from affecting the detection of the optical touch module. The invention provides an operation method of an optical touch display device, wherein the optical touch display device comprises an optical touch module and a display having a backlight module and a display panel. The operation method of the optical touch display device includes the following steps. During the touch scan, the optical touch module is turned on for touch point detection. During the display of the face, the backlight module is turned on to display the face. The back surface display period does not overlap with the touch scan period. In an embodiment of the invention, the touch scan period is located during a picture write period for writing a plurality of display materials to the display panel. In an embodiment of the invention, the touch scan period is less than equal to the face write period. In an embodiment of the invention, the vertical touch period of the touch display device is as described above. In the embodiment of the invention, the facet display period described above is less than the vertical blank period. In the implementation, the sum of the above-mentioned picture writing period and the vertical working period is 4 during the period of the optical touch display device. Device. In the present invention, the display is a color sequence display, and the touch scan period includes a plurality of sub-touch % traces, and the sub-touch scans are used for A plurality of display materials in which a plurality of sub-panels are drawn are written into the evening writing period of the display panel, respectively, by 4 201234338 107203ITW 36834twf.doc/l. In an embodiment of the present invention, the above-mentioned face display/謌 includes multiple learning. In one embodiment of the present invention, each of the above-mentioned sub-touches is less than or equal to the corresponding sub-surface write. During the period of β ^ sub-surface display, these sub-surfaces display multiple vertical blank periods during the display of the touch display device. In an embodiment of the invention, each of the above-described sub-pictures is less than or equal to a corresponding vertical blank period. In the embodiment of the present invention, the sum of the above-mentioned sub-frames and these vertical blank periods is equal to the optical touch display period, during the period of the period. In the embodiment of the present invention, the backlight module is as described above. Based on the above, the optical touch display of the embodiment of the present invention opens the optical touch module during the touch scan: • Also, the backlight mode is turned on during the display of the facet The group can be used to carry out the 』 』 source: two can avoid the optical touch module _ by the backlight module 兴 f3 The above characteristics and advantages can be _, the following special examples, and with the drawings The details are as follows. Embodiments of the present invention are an optical touch display device according to an embodiment of the present invention.

201234338 ιυ/^ujuW 36834twf.doc/I Operation timing diagram. Referring to FIG. 1, the operation method of the present invention is applicable to an optical touch display device having an optical touch module and a display, wherein the display device includes a display panel and a backlight module. In the present embodiment, the face period FR1 includes a facet writer (four) and a blank vertical (10) thin blanking period VB1. Moreover, in the embodiment, the display that is written in the face to the display panel of the panel is turned on, that is, the backlight module is a backlight module. At the time of writing the FW1 towel, the display panel will be turned on (〇N) to write multiple display data of the single screen to the display panel, and the optical touch module will be turned on for the detection of the touch point. The backlight module will turn off ('OFF) during the vertical blanking period, the display panel and the optical touch module will be turned off, and the backlight module will be turned on to provide the (surface) light source and through the (surface) light source. The face is displayed. ', according to the above, 'the optical touch module is turned on for the touch scan, that is, the touch scan period TD1) will be located in the write period of the facet and is equal to 昼©写人顾FW1, (4) light module open (four) line The period of no (ie, the face display period FD1) will be in the vertical: and equal to the vertical blank period. Since the sum of VB1 is equal to the sum of VB1 during the vertical blank period, the positive write period and the vertical blank period VB1 are not heavy total:: , the period TD1 does not overlap with the facet display period Fm. In this way, when the winter touch sensor module performs difficult detection, the backlight module does not = g to avoid the material type of female (4) measurement and acceptance (four) domain_light source shadow 201234338

107203ITW 36834twf.d〇c/I In the present embodiment, it is assumed that the touch scan period TD1 is equal to the written write period FW1 'the face display period FD1 is equal to the vertical blank period vb 1 ' but in other embodiments 'the touch scan period TD1 may be smaller than the facet writing period FW1'' and the facet display period FD1 may be smaller than the vertical blank period VB1, which may be determined according to circuit design requirements or the design of those skilled in the art, and the invention is not limited thereto. In addition, if the display is a stereoscopic display, the facet period FR1 can display the left eye picture or the right eye face, and φ, that is, the face time period FR1 can be the left eye face period or the right eye frame period. 2 is a timing diagram showing the operation of an optical touch display device according to another embodiment of the present invention. Referring to FIG. 1 and FIG. 2, in the embodiment of FIG. i, the display panel is written as a face in one screen period, but depending on the display mode, the face may be divided into one face during a facet period. A plurality of sub-surfaces are respectively written into the display panel, and in this embodiment, a display in which a plurality of sub-surfaces are written in a kneading period is taken as an example, that is, a plurality of sub-picture writing periods are present in the kneading period (such as FR2) ( Such as sfwi ~ SFW3) and multiple vertical blank periods (such as VB2 ~ VB4). Moreover, during the touch scanning process of the touch point detection of the optical touch module, the corresponding touch scan period is divided into a plurality of sub touch scan periods (such as STD1 to STD3), and the display period of the display is correspondingly divided into Multiple sub-surfaces are displayed during the period (such as Sfd 1 to SFD3). In the present embodiment, 'the display is a color sequential display of three color fields as an example' and the FR2 during the meandering period includes the sub-surface write periods SFW1 to SFW3 and the blank vertical periods VB2 to VB4, wherein the sub-surface writes The sum of the periods SFW1 to SFW3 and the vertical blank periods VB2 to VB4 is equal to the kneading period FR2. In the sub-picture writing period SFW1 to SFW3, the display panel

201234338 107203ITW 36834twf.doc/I will be opened to write different sub-sub-surfaces or blue fields respectively (such as red field sub-picture, green field optical touch module will open (four) write people display panel' and period VB2 ~VB4 towel, ^/ secret group will be closed. In the vertical blank and the backlight module will be turned on to enter the board and the optical touch module will be closed, πI surface display. According to the above, the sub touch scan period td between SFW1 And equal to the child * and return to the entry gate STM house period SFW1, the sub-touch scan period STD2 will be located in the facet, between the sfw2 towel and equal to the sub-segment SFI sub-touch scan period will just be located in the face write ^ SFW3 is equal to the sub-plane; ^ period and 3. The sub-surface display period SFD1 will be in the vertical blank period and equal to the vertical blank period VB2' sub-surface display period SFD2 will be in the vertical blank period and equal to vertical VB3, the sub-surface display GU SFD3 will be located in the vertical blank period VB4 and equal to the vertical blank period VB4. Thereby, the detection of the optical touch module can be prevented from being affected by the light source of the backlight module. In the example, suppose the sub-touch The scanning periods STD1 to STD3 are respectively equal to the sub-plane writing periods SFW1 to SFW3, and the sub-surface display periods SFD1 to SFD3 are equal to the vertical blank periods VB2 to VB4, respectively. However, in other embodiments, the sub-touch scanning periods STD1 to STD3 may be The sub-plane write periods SFW1 to SFW3 and the sub-panel display periods SFD1 to SFD3 may be smaller than the vertical blank periods VB2 to VB4, respectively. Further, the above embodiment is exemplified by three color field color sequential displays, and Color-sequence displays with different color field numbers (such as four or five) can be understood according to the above, and will not be described here. 201234338

107203ITW 36834twf.doc/I According to the above, it can be integrated into an operation method of an optical touch display device. FIG. 3 is a flow chart of a method of fabricating an optical touch display device according to an embodiment of the invention. Referring to FIG. 3, during the touch scanning, the optical touch module is turned on for touch point detection (step S31). During the display period, the backlight module is turned on to perform the facet display (step S320), wherein the facet display period does not overlap with the touch scan period. For details of the above steps, reference may be made to the embodiments of FIG. 1 and FIG. 2, and details are not described herein again.

The operation of the optical touch display device of the embodiment of the present invention is as follows: in the touch flip _ will open the optical hard module to perform touch point detection 'will be turned on during the face display The optical module is used to perform the optical display. The optical imaging module can be avoided. Although the present invention has been disclosed in the above embodiments, the present invention has any limitation in the technical field of the present invention. The spirit and scope of the present invention, when the "can be" does not deviate from the scope of protection of the invention, please apply for the patent and the retouching, so the definition of this garden shall prevail. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a timing diagram showing the light emission according to an embodiment of the present invention. Figure 2 is a schematic diagram of the known timing of the implementation of the touch display device (4). Nine-Present Touch Display Device FIG. 3 is a flow chart of a light-known method according to an embodiment of the present invention. Touch display device 201234338

Iu/z.ujii W 36834twf.docA [Description of main component symbols] FD1: 昼1 display period FR1, FR2: facet period FW1: facet write period SFD1 to SFD3: child face display period SFW1 to SFW3: Surface writing period STD BU STD3: Sub-touch scanning period TD1: Touch scanning period VB1 to VB4: Vertical blank period S310, S320: Step

Claims (1)

201234338 107203ITW 36834twf.doc/I VII. Patent Application Range: 1. An optical touch display device operating method, the optical touch display device comprising an optical touch module and having a backlight module and a display The operation of the optical touch display device includes: opening the optical touch module for touch point detection during a touch scan; and opening during a face display The backlight module performs a facet display, wherein the facet display period does not overlap with the touch scan period. 2. The method of operating an optical touch display device according to claim 1, wherein the touch scan period is during a facet writing period for writing a plurality of display materials to the display panel. 3. The method of operating an optical touch display device according to claim 2, wherein the touch scan period is less than or equal to the facet write period. 4. The method of operating an optical touch display device according to claim 2, wherein the face display period is during a vertical blank of the optical touch display device. 5. The method of operating an optical touch display device according to claim 4, wherein the display period of the screen is less than or equal to the vertical blank period. 6. The method of operating an optical touch display device according to claim 4, wherein the sum of the face writing period and the vertical blank period is equal to a face period of the optical touch display device. The method of operating an optical touch display device according to claim 1, wherein the display is a color sequential display. 8. The method of operating the optical touch display device of claim 7, wherein the touch scan period comprises a plurality of sub-touch scan periods, wherein the sub-touch scan periods are respectively located for using a plurality of sub-touch scans. The plurality of display materials of the face are respectively written into the plurality of sub-surface write periods of the display panel. 9. The method of operating an optical touch display device of claim 8, wherein each of the sub-touch scan periods is less than or equal to a corresponding sub-plane write period. 10. The method of operating an optical touch display device according to claim 8, wherein the display period includes a plurality of sub-surface display periods, and the sub-picture display periods are respectively located on the optical touch display Multiple vertical blank periods of the device. 11. The method of operating an optical touch display device according to claim 10, wherein each of the sub-surface display periods is less than or equal to a corresponding vertical blank period. 12. The method of operating an optical touch display device according to claim 10, wherein a sum of the sub-surface writing periods and the vertical blank periods is equal to a glimpse of the optical touch display device. During the period. 13. The method of operating an optical touch display device according to claim 1, wherein the backlight module is a scanning backlight module.