TWI404002B - 3d display and adjustment method for vertical refresh rate thereof - Google Patents

Abstract

The present invention provides a stereoscopic display device and a vertical updated frequency adjusting method, wherein the stereoscopic display device comprises the following components: a display panel, a time sequence signal transmitter, a power frequency detector, an ambient brightness detector and a processor. The display panel displays the stereo image. The time sequence signal transmitter transmits the time sequence signal. The time sequence signal points out the time when the display panel displays right-eye image and the time when the display panel displays the left-eye image. A power supply frequency detector detects the power supply frequency of the stereoscopic display device. The ambient brightness detector detects the ambient brightness at the periphery of the stereoscopic display device. The processor adjusts a vertical updating frequency of the display panel according to the power supply frequency and the ambient brightness, and causes the time sequence signal transmitter to transmit a time sequence signal that corresponds with the vertical updating frequency.

Description

Stereoscopic display and vertical update frequency adjustment method thereof

The present invention relates to a 3D display, and in particular to a vertical refresh rate of a stereoscopic display.

The current stereoscopic display, taking the 120Hz model as an example, the vertical update frequency that can be set in the stereo mode is generally 100Hz, 110Hz and 120Hz. In 100 Hz, 50 Hz is used to update the image of the left eye, 50 Hz is used to update the image of the right eye, then the left eye of the shutter glasses is opened 50 times in one second, and the right eye is also opened 50 times in one second. . A vertical update frequency of 100 Hz is typically used in countries with a supply frequency of 50 Hz. In the case of 120 Hz, 60 Hz is used to update the image of the left eye, 60 Hz is used to update the image of the right eye, and then the left eye of the shutter glasses is opened 60 times in one second, and the right eye is also opened 60 times in one second. The 120 Hz vertical update frequency is commonly used in countries with a power supply frequency of 60 Hz. Finally, 110Hz can be used in the environment where the power frequency is 60Hz and the ambient light source is dark. 55Hz is used to update the image of the left eye, and 55Hz is used to update the image of the right eye.

It can be seen that the vertical update frequency of the stereo mode is twice the indoor AC frequency, because the screen flicker caused by the vertical update frequency of the single eye and the mains frequency is avoided. Therefore, in combination with the above various reasons, the stereoscopic display that is generally available on the market allows the user to manually adjust the most suitable setting. However, this method is very time consuming, laborious, and cumbersome, and may be very inconvenient for the elderly and children to use.

The invention provides a stereoscopic display, which can automatically set the vertical update frequency to simplify the cumbersome use setting step.

The invention further provides a vertical update frequency adjustment method for a stereoscopic display, which can automatically set the vertical update frequency of the stereoscopic display to help the user obtain the best viewing effect.

The invention provides a stereoscopic display comprising a display panel, a timing signal transmitter, a power frequency detector, an ambient brightness detector, and a processor. The display panel displays a stereoscopic image. The timing signal transmitter transmits a timing signal that indicates when the display panel displays the right eye image and when the left eye image is displayed. The power frequency detector detects the power frequency of the stereo display. The ambient brightness detector detects the ambient brightness around the stereo display. The processor is coupled to the display panel, the timing signal transmitter, the power frequency detector, and the ambient brightness detector. The processor adjusts the vertical update frequency of the display panel according to the power frequency and the ambient brightness, and controls the timing signal transmitter to emit a timing signal corresponding to the vertical update frequency.

In an embodiment of the invention, the processor sets the vertical update frequency to a predetermined even multiple of the power supply frequency, for example, two or four times.

In an embodiment of the invention, if the ambient brightness is lower than a threshold, the processor sets the vertical update frequency to a first preset value. If the ambient brightness is not below the threshold, the processor sets the vertical update frequency to a second preset value. The second preset value is a preset even multiple of the power frequency, and the first preset value is less than the second preset value.

The invention further provides a vertical update frequency adjustment method for a stereoscopic display, comprising the steps of: detecting a power frequency of the stereoscopic display. Detect the ambient brightness around the stereo display. The vertical update frequency of the stereoscopic display is adjusted according to the power frequency and the ambient brightness, and a timing signal corresponding to the vertical update frequency is transmitted. This timing signal indicates when the stereoscopic display displays the right eye image and when the left eye image is displayed.

Based on the above, the present invention can automatically adjust the vertical update frequency of the stereoscopic display according to the power frequency and the ambient brightness, so that the user can obtain the best viewing effect without cumbersome use setting steps.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a schematic diagram of a stereoscopic display 100 in accordance with an embodiment of the present invention. The stereoscopic display 100 includes a power supply 110, a power frequency detector 120, an ambient brightness detector 130, a stereo image source 140, a scaler 150, a timing signal transmitter 160, a processor 170, and a display panel 180.

The power supply 110 converts the indoor power source from alternating current to direct current to provide the power required by the stereoscopic display 100. Depending on the region, the indoor power supply will have various voltages and frequencies. For example, the power supply voltage can be 110V or 220V, and the power supply frequency can be 50Hz or 60Hz. The power frequency detector 120 detects the power frequency, that is, the power frequency accepted by the stereoscopic display 100. The ambient brightness detector 130 detects ambient brightness around the stereoscopic display 100. The stereo image source 140 provides a stereoscopic image. The scaler 150 enlarges or reduces the stereoscopic image so that the stereoscopic image has a resolution supported by the display panel 180.

The processor 170 is coupled to the power frequency detector 120, the ambient brightness detector 130, the scaler 150, the timing signal transmitter 160, and the display panel 180. The processor 170 divides the stereoscopic image output by the scaler 150 into a right eye image and a left eye image to obtain a stereoscopic effect. The display panel 180 displays stereoscopic images arranged through the processor 170. The timing signal transmitter 160 transmits a timing signal for reception by the shutter glasses. The timing signal indicates when the display panel 180 displays the right eye image and when the left eye image is displayed, so that the lens switch of the shutter glasses can be synchronized with the display of the left and right eye images. The processor 170 can adjust the vertical update frequency of the display panel 180 according to the power frequency and the ambient brightness, and control the timing signal transmitter 160 to emit a timing signal corresponding to the vertical update frequency to achieve the goal of automatically adjusting the vertical update frequency. See the flow of Figure 3 below.

2 is a schematic diagram of a stereoscopic display 200 in accordance with another embodiment of the present invention. The main difference between FIG. 1 and FIG. 2 is that the processor 170 of the stereoscopic display 100 is independent of the scaler 150, while the processor 170 of the stereoscopic display 200 is incorporated into the scaler 150. The remaining details of the stereoscopic display 200 are the same as those of the stereoscopic display 100, and therefore will not be described again.

3 is a flow chart of a vertical update frequency adjustment method of a stereoscopic display executed by the stereoscopic display 100 or the stereoscopic display 200. The following description takes the stereoscopic display 100 as an example. First, the power frequency detector 120 detects the power frequency of the stereoscopic display 100 (step 310). Next, the ambient brightness detector 130 detects ambient brightness around the stereoscopic display 100 (step 320). Thereafter, the processor 170 adjusts the vertical update frequency of the stereoscopic display 100 according to the power frequency and the ambient brightness (step 330). Finally, the timing signal transmitter 160 transmits a timing signal corresponding to the vertical update frequency, which indicates when the stereoscopic display 100 displays the right eye image and when the left eye image is displayed (step 340).

4 is a flow chart showing the detailed steps of the vertical update frequency adjustment method of the stereoscopic display performed by the stereoscopic display 100 or the stereoscopic display 200. The following description takes the stereoscopic display 100 as an example. First, the power frequency detector 120 detects the power frequency of the stereoscopic display 100 (step 410), and then the processor 170 checks if the power frequency is 50 Hz (step 420). If the power supply frequency is 50 Hz, the processor 170 sets the vertical update frequency of the display panel 180 to twice the power supply frequency, that is, 100 Hz, and controls the timing signal transmitter 160 to transmit a timing signal corresponding to the vertical update frequency of 100 Hz (step 430). ).

On the other hand, if the power frequency is not 50 Hz, the ambient brightness detector 130 detects ambient brightness around the stereoscopic display 100 (step 440), and then the processor 170 checks if the ambient brightness is lower than a preset threshold (step 450). . The purpose of step 450 is to check whether the indoor light is turned on, so the above threshold can be determined according to the brightness of the lights on the market.

If the ambient brightness is not lower than (equal to or greater than) the threshold, indicating that the light is on, the vertical update frequency must be set to an even multiple of the power frequency to avoid flickering. For example, the processor 170 may set the vertical update frequency of the display panel 180 to an even multiple (eg, twice) of the power supply frequency, and control the timing signal transmitter 160 to transmit a timing signal corresponding to the vertical update frequency (step 470), if When the power frequency is 60 Hz, the vertical update frequency of the display panel 180 is 120 Hz/240 Hz.

On the other hand, if the ambient brightness is lower than the critical value, indicating that the light is not turned on, the screen flicker does not occur at this time, so it is not necessary to set the vertical update frequency to an even multiple of the power frequency, but the vertical update frequency can be set. It is low to increase the brightness that users see. For example, the processor 170 may set the vertical update frequency of the display panel 180 to 110 Hz/220 Hz or 100 Hz/200 Hz (below 120 Hz/240 Hz set in step 470), and control the timing signal transmitter 160 to transmit the timing corresponding to the vertical update frequency. Signal (step 460).

In steps 420 and 430, since the stereoscopic display 100 does not support a vertical update frequency below 100 Hz, it is not necessary to check whether the ambient brightness is below a critical value.

The vertical update frequency set by the processor 170 in steps 460 and 470 is based on twice the power frequency, but the invention is not limited thereto. In other embodiments of the present invention, the processor may set the vertical update frequency of the display panel 180 to a first preset value in step 460, and set the vertical update frequency of the display panel 180 to a second preset value in step 470, where The second preset value is a preset even multiple of the power frequency detected by the power frequency detector 120, for example, an even multiple of twice, four times, or higher, and the first preset value is less than the second preset value. .

In summary, the present invention can automatically adjust the vertical update frequency of the stereoscopic display according to the power frequency and the ambient brightness, so that the user can obtain the best viewing effect without cumbersome use setting steps.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 200. . . Stereoscopic display

110. . . Power Supplier

120. . . Power frequency detector

130. . . Ambient brightness detector

140. . . Stereo image source

150. . . Scaler

160. . . Timing signal transmitter

170. . . processor

180. . . Display panel

310~340, 410~470. . . Process step

1 is a schematic diagram of a stereoscopic display in accordance with an embodiment of the present invention.

2 is a schematic diagram of a stereoscopic display in accordance with another embodiment of the present invention.

3 is a flow chart of a method for adjusting a vertical update frequency of a stereoscopic display according to an embodiment of the invention.

4 is a flow chart showing the detailed steps of a method for adjusting a vertical update frequency of a stereoscopic display according to another embodiment of the present invention.

310~340. . . Process step

Claims (6)

A stereoscopic display includes: a display panel for displaying a stereoscopic image; and a timing signal transmitter for transmitting a timing signal indicating when the display panel displays a right eye image and when the left eye image is displayed; a power frequency detector Detecting a power frequency of the stereoscopic display; an ambient brightness detector for detecting ambient brightness around the stereoscopic display; and a processor coupled to the display panel, the timing signal transmitter, and the power frequency detector And the ambient brightness detector adjusts a vertical update frequency of the display panel according to the power frequency and the ambient brightness, and controls the timing signal transmitter to transmit the timing signal corresponding to the vertical update frequency. The stereoscopic display of claim 1, wherein the processor sets the vertical update frequency to a predetermined even multiple of the power frequency. The stereoscopic display of claim 1, wherein if the ambient brightness is lower than a threshold, the processor sets the vertical update frequency to a first preset value; and if the ambient brightness is not lower than The threshold value is set by the processor to the second preset value, wherein the second preset value is a preset even multiple of the power frequency, and the first preset value is smaller than the first Two preset values. A method for adjusting a vertical update frequency of a stereoscopic display, comprising: detecting a power frequency of a stereoscopic display; detecting an ambient brightness around the stereoscopic display; adjusting a vertical update frequency of the stereoscopic display according to the power supply frequency and the ambient brightness; and transmitting A timing signal corresponding to the frequency of the vertical update, the timing signal indicates when the stereoscopic display displays the right eye image and when the left eye image is displayed. The vertical update frequency adjustment method of the stereoscopic display of claim 4, wherein the step of adjusting the vertical update frequency comprises: setting the vertical update frequency to a predetermined even multiple of the power supply frequency. The method for adjusting a vertical update frequency of a stereoscopic display according to claim 4, wherein the step of adjusting the vertical update frequency comprises: if the ambient brightness is lower than a threshold, setting the vertical update frequency to a first a preset value; and if the ambient brightness is not lower than the threshold, setting the vertical update frequency to a second preset value, wherein the second preset value is a preset even multiple of the power frequency, and The first preset value is smaller than the second preset value.