CN100505894C - Driving method for enhancing 3D (three-dimensional) display brightness without resolution loss - Google Patents

Abstract

A driving method for enhancing the brightness of 3D stereoscopic display without resolution loss comprises the following steps: providing two display panels, wherein one display panel is a uniaxial grating panel, the other display panel is an active matrix panel, the active matrix panel respectively defines gate lines as longitudinal driving, and defines source lines as transverse driving; scanning sequentially in synchronization with the grid scanning period of the active matrix panel through the scanning raster of the single-axis raster panel; and providing a backlight source which is constantly opened, so that the naked eye can present a 3D display effect.

Description

Driving method for enhancing brightness of 3D stereoscopic display without loss of resolution

technical field

The invention relates to a driving method for 3D stereoscopic display, in particular to a driving method for enhancing brightness of 3D stereoscopic display without loss of resolution.

Background technique

In recent years, with the development of 3D, the market can be divided into two parts: 3D Engine and 2D/3D Conversion. 3D Engine is mainly a single 2D image source, which simulates 3D images, but most of them are used in the personal computer market; and 2D/3D Conversion 3D Conversion mainly uses two images with different perspectives of the left and right eyes to separate the vision of the two eyes to achieve a 3D effect. It is mainly used in portable products such as mobile phones and PDAs.

The known 3D stereoscopic display method and its device are mainly to set two groups of gratings that are complementary and staggered in the display, and use the concept of time domain to control the opening and closing of the two groups of gratings, so that when the display frequency is an odd frequency, one group of gratings is activated. , and activate another group of gratings at even frequencies, and the two groups of gratings are continuously opened and closed according to frequency changes, so that the left and right eyes can see independent images formed by different sub-pixels at odd and even frequencies, and can achieve different resolutions. In the lowered state, the naked eye vision presents a 3D display effect.

For known methods, please refer to the panel structure shown in FIG. 1, which includes a backlight assembly 11, a liquid crystal display module 10 and two sets of complementary gratings 1 (TN1) and gratings 2 ( TN 2), and there is a gap between the two sets of grating 1 (TN1) and grating 2 (TN 2).

When displaying the time domain with an odd frequency, the grating 1 (TN1) is activated (shading) and the grating 2 (TN 2) is off (transmitting light), at this time the left eye can only see the right side of each notch of the grating 1 (TN1) sub-pixels, and the right eye can only see the sub-pixels on the left side of each gap of grating 1 (TN1). For example, if the image is a graphic with 128*160 pixels, the left eye will see a set of graphics with 64 x 160 pixels, and the right eye will see another set of graphics with 64 x 160 pixels; when the display frequency is in the time domain of even frequency, Barrier 1 (TN1) is off (transmitting light) and Barrier 2 (TN 2) is active (light blocking), at this time the left eye can only see the sub-pixels on the right side of each notch of Barrier 2 (TN), while the right eye can only see Barrier 2 (TN2) The sub-pixels on the left side of each notch, the arrangement of the grating 2 (TN2) and the sub-pixels seen by the left and right eyes respectively are the states shown in Figure 2B. Taking a graphic with an original image of 128×160 pixels as an example, The left eye will see one set of graphics at 64 x 160 pixels, and the right eye will see another set of graphics at 64 x 160 pixels.

Since grating 1 (TN1) and grating 2 (TN 2) are complementary and interleaved, the sub-pixels seen by the left and right eyes at even frequencies are exactly the same as the sub-pixels seen by the left and right eyes at odd frequencies Adjacent, in other words, in one display cycle, the left and right eyes will respectively see two different and adjacent 64×160 pixel graphics. A 128×160-pixel graphic, and since the left and right eyes see different independent images, a 128×160-pixel 3D image will be presented under naked-eye vision.

It can be seen from FIG. 3 that at different raster 1 ( T1 ) and raster 2 ( T2 ) times, the fixed sub-pixels will change the display data for the left eye or the right eye according to the switching time of raster 1 and raster 2 .

Figure 4 is a known 3D stereoscopic display method. It can be seen that the opening and closing time of the grating 1 (T1) and the grating 2 (T2) are kept at 8.3ms, within the time of the odd field (Odd Field) and the even field (Even Field) , because the display screen has not been scanned, so during the scanning of odd and even frames, there is a fixed time to turn off the backlight, and then wait for the liquid crystal stabilization (LCD formation) time. This part is when the last scanning line (scan) is scanned line), wait for the time required for the liquid crystal to complete the operation, and then activate the backlight after the completion, and then the human eye can receive the correct 3D image. However, this driving method will lead to the disadvantage of reducing the brightness of the overall 3D display. .

Contents of the invention

In view of the problem that the luminance of the overall 3D display is reduced due to the known driving method. The main purpose of the present invention is to provide a driving method for enhancing the brightness of 3D stereoscopic display without loss of resolution, comprising the following steps:

Provide two display panels, one is a single-axis grating panel, and the other is an active matrix panel. The active matrix panel defines the gate line (Gate Line) as the vertical drive (Column Driver), and defines the source line (Source Line) as Horizontal drive (Row Drivers);

The scanning grating (Scan Shutter) of the single-axis grating panel is synchronized with the grid scanning period (one scan line duty) of the active matrix panel for sequential scanning; and

Provide a backlight source that is always on, so that the naked eye can present a 3D stereoscopic display effect.

Regarding the characteristics and implementation of the present invention, the preferred embodiments are described in detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of the structural arrangement of TN1 and grating 2 (TN2) for known 3D stereoscopic display;

FIG. 2A is a schematic diagram of a display state of a known 3D stereoscopic display at an odd frequency;

FIG. 2B is a schematic diagram of a display state of a known 3D stereoscopic display at an even frequency;

FIG. 3 is a schematic diagram of the known 3D display images that can be viewed separately by both eyes at the same time under the condition of high-speed switching;

4 is a schematic diagram of a known driving method for 3D stereoscopic display;

FIG. 5A is a flow chart of a driving method for enhancing the brightness of a 3D stereoscopic display without loss of resolution according to the present invention;

FIG. 5B is a structure diagram of gate lines & source lines of a known active matrix panel;

FIG. 5C is a structural diagram of an active matrix panel and a single-axis grating panel of the present invention; and

FIG. 6 is a schematic diagram of a driving method for enhancing brightness of a 3D stereoscopic display without loss of resolution according to the present invention.

Symbol Description

10 LCD module 11 Backlight assembly

TN1 grating 1 TN 2 grating 2

20 Active matrix panel 30 Single axis grating panel

Detailed ways

Specific embodiments are given below to describe the content of the present invention in detail, and the accompanying drawings are used as auxiliary descriptions. The symbols mentioned in the description are reference symbols.

Please refer to FIG. 5A , the present invention proposes a driving method for enhancing the luminance of 3D stereoscopic display without loss of resolution, which overcomes the shortcomings of the known driving method that causes the luminance of the overall 3D display to decrease, including the following steps:

Provide two display panels, one is a single-axis grating panel, and the other is an active matrix panel. The active matrix panel defines the gate line (Gate Line) as the vertical drive (Column Driver), and defines the source line (Source Line) as Horizontal driving (Row Drivers) (step 500); sequential scanning (step 510) through the scanning grating (Scan Shutter) of the single-axis grating panel synchronously with the gate scanning period (one scan line duty) of the active matrix panel; and Provide a backlight source that is always on, so that the naked eye can present a 3D stereoscopic display effect (step 520 ).

FIG. 5B is a structure diagram of the gate line & source line of the known active matrix panel 20. Please refer to FIG. The grating panel 30 scans the active matrix panel that defines the direction of the gate line & source line differently from the past. The reason is that only the definition after converting it to consider the color switching (2D: RGB; 3D : RRGGBB).

FIG. 6 is a schematic diagram of a driving method for enhancing the brightness of 3D stereoscopic display according to the present invention, wherein the scanning rate expressed is 120 Hz, and the display frequency is 60 Hz. Taking QVGA (240×RGB×320) level resolution as an example, The time of each frame (Frame) is 1/120×320/320, the switching time of data is 1/120×1/320, and the holding time of data is 1/120×319/320. The 3D display technology with low rate loss is achieved by using the concepts of time-division multiplex (Temporal Division Multiplex; TDM) and space-division multiplex (Spatial Division Multiplex; SDM) at the same time. Sequential scanning is turned on and off, wherein the time-sharing multitasking and space-division multitasking are controlled through the output signal of the data-driven chip, and the sequential scanning is to scan horizontally in sequence. Taking the present invention as an example, the sequence is from right to The left side is used to switch the specific raster (Shutter) on and off. This mechanism will enable the backlight to be always on without waiting for the entire page to be scanned. This can maintain the brightness performance during 3D display and solve the problem caused by the known driving method. The downside of overall 3D display brightness drop.

Although the present invention is disclosed above with the described preferred embodiments, it is not intended to limit the present invention. Any person familiar with the related art may make some changes and modifications without departing from the spirit and scope of the present invention. , so the protection scope of the present invention must be defined according to the claims of the present application.

Claims (4)

1. A driving method for strengthening the 3D stereo display brightness without loss of resolution, comprising the following steps: Two display panels are provided, one is a single-axis grating panel, and the other is an active matrix panel, and the active matrix panel defines the gate line as vertical driving and the source line as horizontal driving; performing sequential scanning through the scanning grating of the single-axis grating panel synchronously with the grid scanning period of the active matrix panel; and Provide a backlight source that is always on, so that the naked eye can present a 3D stereoscopic display effect. 2 . The driving method for enhancing the brightness of 3D stereoscopic display without resolution loss as claimed in claim 1 , wherein it is achieved by utilizing time-division multitasking and space-division multitasking simultaneously. 3 . 3 . The driving method for enhancing the brightness of 3D stereoscopic display without loss of resolution as claimed in claim 1 , wherein the sequential scanning is sequential horizontal scanning. 4 . 4 . The driving method for enhancing the brightness of a 3D stereoscopic display without loss of resolution as claimed in claim 1 , wherein the sequential scanning is to sequentially switch a grating on and off. 5 .

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