TWI433130B - Display system and method - Google Patents

Description

Display system and method

The present invention relates to a display system and method, and more particularly to a display system and method that enables at least two users to simultaneously view images of different channels on the same screen.

Dual (or multiple) display technology is a technology that allows different users to simultaneously view images or pictures of different channels displayed on the same screen. The development of this technology can meet the different viewing needs of different users and maximize the display. Utility, this technology can also enable multiple people to jointly play games that belong to different situations or visions.

The conventional dual (or multiple) display technology distributes images provided to different users alternately on the pixels of the display panel, and sets a parallax barrier on the front side of the pixel when the user is in a different position. Different images can be viewed from the angle of view. Since this technology displays two (or more) different images simultaneously on the pixels, this results in a decrease in the resolution of the image viewed by each user, and the user must be at a specific viewpoint to view. This will also cause inconvenience during viewing.

It is an object of the present invention to provide a display system and method for two (or more) users to simultaneously view images of different channels on the same screen.

Another object of the present invention is to provide a display system and method for solving the problem of reduced image resolution displayed in a conventional dual (or multiple) display system.

It is yet another object of the present invention to provide a display system and method for improving the situation in which a user must be at a particular viewing position or angle in a conventional dual (or multiple) display system.

To achieve the foregoing objective, the present invention provides a display system including a display module, a dynamic polarization panel, a first polarized glasses, and a second polarized glasses. The display module displays an image of a first channel during a first frame in a time sharing manner and displays an image of a second channel during a second frame. The dynamic polarization panel is configured to convert the image of the first channel into a first polarization direction during the first frame, and convert the image of the second channel into a second during the second frame. Polarization direction. The first polarizing glasses have the same transmission axis direction as the first polarization direction for viewing the image of the first channel; and the second polarized glasses have the same transmission axis direction and the second polarization direction. For viewing the image of the second channel.

Another aspect of the present invention provides a display method, including the steps of: displaying an image of a first channel during a first frame; and polarizing an image of the first channel during the first frame to have a first polarization direction; displaying an image of the second channel during a second frame; polarizing the image of the second channel during the second frame to have a second polarization direction; Providing a first polarizing glasses and a second polarizing glasses, wherein the first polarizing glasses have the same transmission axis direction as the first polarization direction for viewing the image of the first channel, and the second polarizing glasses are The direction of the transmission axis is the same as the direction of the second polarization for viewing the image of the second channel.

The display system and method of the present invention display images of different channels in a time-sharing manner, so the resolution is the same as that in the single display, and there is no problem that the resolution is lowered. Moreover, the present invention does not have the problem that the user must be in a viewing position or angle in the prior art. Furthermore, in the present invention, when a plurality of users simultaneously watch different channels on the same screen, the screen does not flicker.

Figure 1 shows a schematic diagram of a display system of the present invention. The display system 100 of the present invention includes a display device 110, a first polarizing glasses 60 and a second polarizing glasses 70. The display device 110 includes a display module 120 and a dynamic polarization panel 50. The display module 120 provides display images in time division, and alternately displays screens of different channels, for example, displaying images of the first channel during the first frame and displaying the second channel during the second frame. The image of the first channel and the second channel are respectively displayed during the adjacent two frames. The dynamic polarization panel 50 is capable of polarizing an image or a picture, which converts the image of the first channel to have a first polarization direction during the first frame, and converts the image of the second channel during the second frame. In order to have a second polarization direction, the first polarization direction is different from the second polarization direction. The direction of the transmission axis of the first polarizing glasses 60 is the same as the first polarization direction. Specifically, the directions of the transmission axes of the left and right lenses of the first polarizing glasses 60 are the same as the first polarization direction, so the first channel is The image can pass through the first polarizing glasses 60; the direction of the transmission axis of the second polarizing glasses 70 is the same as the direction of the second polarization, specifically, the direction of the transmission axis of the left and right lenses of the second polarizing glasses 70 is the same as the second The polarization directions are the same, so that the image of the second channel can pass through the second polarized glasses 70. Therefore, when the user wears the first polarizing glasses 60, the image of the first channel can be viewed; when the user wears the second polarizing glasses 70, the image of the second channel can be viewed. Moreover, when the two different users respectively wear the first polarizing glasses 60 and the second polarizing glasses 70, the images of different channels on the same screen can be simultaneously viewed.

It should be noted that, in addition to providing two channels of images for viewing by two users, the display system 100 of the present invention can also be implemented as a multi-channel multi-display system, for example, the display module 120 provides multiple times in a time sharing manner. The image of the channel, the dynamic polarization panel 50 converts the images of the respective channels into different polarization directions, and provides polarized glasses corresponding to the polarization directions, so that multiple users can wear different polarized glasses to watch on the same screen. The channel you like, or operate according to the screen displayed on your channel.

In one embodiment, the display module 120 includes a backlight 10, a lower polarizer 20, a display panel 30, and an upper polarizer 40. The display panel 30 can be a liquid crystal panel including a thin film transistor array substrate 32, a color filter substrate 36, and a liquid crystal layer 34 disposed between the substrates 32, 36. The backlight panel 10 provides a backlight source such as a cold cathode tube and a light emitting diode (LED) light source. The lower polarizing plate 20 and the upper polarizing plate 40 are used to polarize light. When the light provided by the backlight 10 passes through the lower polarizing plate 20, the light is polarized, and the thin film transistor on the thin film transistor array substrate 32 can be controlled. The deflection of the liquid crystal molecules in the liquid crystal layer 34 changes the angle of the polarization of the light. The light having different polarization directions passes through the color filter substrate 36 and then enters the upper polarizing plate 40. The upper polarizing plate 40 is only allowed to have the same direction of the transmission axis. The polarized light passes through, whereby the image displayed by the display module 120 has a certain polarization direction.

In one embodiment, the dynamic polarization panel 50 is disposed on the front side of the display module 120 between the display module 120 and the first polarized glasses 60 or between the display module 120 and the second polarized glasses 70. The dynamic polarizing panel 50 includes a liquid crystal panel, such as an electrically controlled birefringence (ECB) liquid crystal panel. The liquid crystal panel includes at least one liquid crystal layer 54 interposed between a first glass substrate 51 and a second glass substrate 52. between. The dynamic polarization panel 50 can change the polarization direction of the image from the display module 120 by twisting the alignment of the liquid crystal molecules in the liquid crystal layer 54. Therefore, when the dynamic polarization panel 50 converts the image of the first channel to have the first polarization direction during the first frame and converts the image of the second channel to the second polarization direction during the second frame, The polarized glasses corresponding to the first polarization direction can be worn to view the image of the first channel, and the polarized glasses corresponding to the second polarization direction can be worn to view the image of the second channel.

In an embodiment, when the display module 120 provides images of two different channels, the frequency of the image displayed by the display module 120 may be the display frequency of the image of the first channel or the display frequency of the image of the second channel. About twice. For example, the display module 120 can be designed to display images at a frequency of 120 Hz (or more), wherein the first frame period is equal to the second frame period, and the first channel image display frequency is 60 Hz (or more). ), the display frequency of the image of the second channel is also 60 Hz (or more). In this way, the frequency of each channel display image is 60 Hz (or above), and the screen will not flicker.

In one embodiment, the first polarizing glasses 60 and the second polarizing glasses 70 may each be a linear polarizing plate. In another embodiment, one of the first polarizing glasses 60 and the second polarizing glasses 70 is a linear polarizing plate, and the other is a circular polarizing plate. In still another embodiment, the first polarizing glasses 60 are annular polarizing plates corresponding to left-handed polarized light, and the second polarizing glasses 70 are annular polarizing plates corresponding to right-handed polarized light.

Fig. 2 is a timing chart showing the operation of the display system of the present invention. The overall operation of the display system 100 of the present invention will be described below with reference to Figs. 1 and 2. First, the backlight panel 10 provides a backlight source (BL) which emits light having a polarization direction of 135° through a lower polarizing plate 20 having a transmission axis direction of 135°. The display panel 30 provides image data (DATA1) at a frequency of 120 Hz, which alternately provides image data of the first channel and the second channel in a time sharing manner, as shown in FIG. 2, during the first frame period (T1) Providing an image of the first channel (VIEW1), and providing an image of the second channel (VIEW2) during the second frame (T2), the image of the first channel and the image of the second channel are adjacently and continuously provided.

It should be noted that in the embodiment in which the display panel 30 and the dynamic polarizing panel 50 all include a liquid crystal panel, the liquid crystal molecules corresponding to the two panels may have a reaction time difference due to different data input by the corresponding pixels, which is likely to cause the first The image of the channel and the image of the second channel interfere with each other (crosstalk) or overlap display during display. The present invention can utilize the method of dynamic backlight, that is, the backlight is turned off briefly during the first frame (T1) and During the second frame period (T2), the backlight is turned off briefly. As shown in FIG. 2, when the first frame period (T1) starts and the display panel 30 starts to provide the image data of the first channel, the backlight is turned off for a predetermined time. And, during the start of the second frame (T2), when the display panel 30 starts to provide the image data of the second channel, the backlight is turned off for a predetermined time, so that when the image of the first channel and the image of the second channel overlap Since the backlight is turned off, the user does not see overlapping images.

Then, the light from the color filter substrate 36 of the display panel 30 enters the upper polarizing plate 40, where the direction of the transmission axis of the upper polarizing plate 40 is 45°, so that the image of the first channel after passing through the upper polarizing plate 40 Both (VIEW1) and the second channel image (VIEW2) have a 45° polarization direction (D1). The dynamic polarization panel 50 respectively provides gray scale signals (DATA2) with values of 0 and 255 during the first frame period (T1) and the second frame period (T2) to control liquid crystal molecule deflection (D2). Thereby, the dynamic polarization panel 50 can pass the image of the first channel (VIEW1) which is originally the 45° polarization direction during the first frame period (T1), and the second channel during the second frame period (T2). The image (VIEW2) is converted to a polarization of 135°. When the user wears polarized glasses with both sides of the left and right eyes that are 45° in the axial direction, only the image of the first channel having the same polarization direction of 45° is allowed to pass through, so that the image of the first channel can be viewed (VIEW1) (V1) When the user wears polarized glasses with the left and right eyes 135° in the direction of the axis, only the image of the second channel with the same polarization direction of 135° is allowed to pass through, so that the image of the second channel can be viewed (VIEW 2) (V2). Moreover, two different users can simultaneously view images of different channels on the same screen.

Figure 3 is a flow chart showing the display method of the present invention. First, a liquid crystal panel alternately displays a first channel image during a first frame in a time sharing manner (step S1), and displays a second channel image during a second frame (step S2). The display frequency of the image of the first channel and the display frequency of the image of the second channel are both 60 Hz. And then polarizing the image of the first channel displayed during the first frame to have a first polarization direction (step S3); and polarizing the image of the second channel displayed during the second frame Having a second polarization direction (step S4), the first polarization direction being different from the second polarization direction, wherein another liquid crystal panel can be used to image the first channel and the second channel The image is polarized. Providing a first polarizing glasses and a second polarizing glasses for the user to view the image of the first channel and the image of the second channel (step S5), wherein the first and second polarizing glasses have a transmission axis direction of the left and right lenses The first polarization direction is the same, and the transmission axis directions of the left and right lenses of the second polarization glasses are the same as the second polarization direction. Thereby, when the user wears the first polarized glasses, the image of the first channel can be viewed; when the user wears the second polarized glasses, the image of the second channel can be viewed, and the two are used. They can also watch images of their own channels at the same time. The specific implementation and principles of the display method of the present invention are similar to the foregoing description, and are not described herein again.

The display system and method of the present invention display images of different channels in a time-sharing manner. Since the images are presented by all the pixels on the panel, the resolution is the same as that in the single display, and there is no problem that the resolution is lowered. Moreover, in the present invention, the user does not need to be at a particular viewing position to view different channels, so the present invention does not have the problem that the user must be in a viewing position or angle in the prior art. Moreover, the image display frequency of each channel can be designed to be above 60 Hz, so when multiple users simultaneously watch different channels on the same screen, the screen does not flicker.

In view of the above, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the invention, and the present invention may be made without departing from the spirit and scope of the invention. Various modifications and refinements are made, and the scope of the present invention is defined by the scope of the appended claims.

10. . . Backlight

20. . . Lower polarizer

30. . . Display panel

32. . . Thin film transistor array substrate

34. . . Liquid crystal layer

36. . . Color filter substrate

40. . . Upper polarizer

50. . . Dynamic polarization panel

51. . . First glass substrate

52. . . Second glass substrate

54. . . Liquid crystal layer

60. . . First polarized glasses

70. . . Second polarized glasses

100. . . display system

110. . . Display device

120. . . Display module

VIEW1. . . Image of the first channel

VIEW2. . . Image of the second channel

T1. . . First frame period

T2. . . Second frame period

S1~S5. . . step

Figure 1 shows a schematic diagram of a display system of the present invention.

Fig. 2 is a timing chart showing the operation of the display system of the present invention.

Figure 3 is a flow chart showing the display method of the present invention.

10. . . Backlight

20. . . Lower polarizer

30. . . Display panel

32. . . Thin film transistor array substrate

34. . . Liquid crystal layer

36. . . Color filter substrate

40. . . Upper polarizer

50. . . Dynamic polarization panel

51. . . First glass substrate

52. . . Second glass substrate

54. . . Liquid crystal layer

60. . . First polarized glasses

70. . . Second polarized glasses

100. . . display system

110. . . Display device

120. . . Display module

Claims (9)

A display system includes: a display module that displays a first channel image during a first frame in a time sharing manner and displays a second channel image during a second frame; a dynamic polarization a panel, configured to convert the image of the first channel to have a first polarization direction during the first frame, and convert the image of the second channel to have a second polarization direction during the second frame a first polarizing glasses having a transmission axis direction identical to the first polarization direction for viewing an image of the first channel; and a second polarizing glasses having a transmission axis direction that is the same as the second polarization direction For viewing the image of the second channel, wherein the display module uses a dynamic backlight to turn off the backlight for a predetermined period at the beginning of the first frame period and at the beginning of the second frame period. time. The display system of claim 1, wherein the dynamic polarization panel comprises a liquid crystal panel comprising a liquid crystal layer. The display system of claim 1, wherein the left and right lenses of the first polarizing glasses have the same transmission axis direction as the first polarization direction. The display system of claim 1, wherein the left and right lenses of the second polarized glasses have the same transmission axis direction as the second polarization direction. The display system of claim 1, wherein the first polarized glasses only allow images of the first channel having the first polarization direction to traverse. The display system of claim 1, wherein the second polarized glasses are only The image of the second channel having the second polarization direction is allowed to traverse. The display system of claim 1, wherein the dynamic polarizing panel is disposed on a front side of the display module, between the display module and the first polarized glasses, or the display module and the second polarized light. Between the glasses. The display system of claim 1, wherein the display module displays the frequency of the image as twice the display frequency of the image of the first channel or the display frequency of the image of the second channel. A display method includes the steps of: displaying an image of a first channel during a first frame; and polarizing an image of the first channel during the first frame to have a first polarization direction; Displaying an image of the second channel during a second frame; polarizing the image of the second channel during the second frame to have a second polarization direction; using dynamic backlighting, Turning off the backlight for a predetermined period of time at the beginning of the first frame period and at the beginning of the second frame period; and providing a first polarizing glasses and a second polarizing glasses, wherein the first polarizing glasses are worn The through-axis direction is the same as the first polarization direction for viewing the image of the first channel, and the transmission axis direction of the second polarized glasses is the same as the second polarization direction for viewing the second channel image.