Display device

Abstract

The invention discloses a display device which comprises a backlight module, a display panel and a polarizing plate. The polarizer comprises a quarter-wave plate, a first half-wave plate, a second half-wave plate and a polarizer. The first half-wave plate is arranged on the quarter-wave plate and is configured to generate second polarized light with a second polarization direction. The second half-wave plate is arranged on the first half-wave plate and is configured to generate third polarized light with a third polarization direction. The polarizer is arranged on the second half-wave plate and faces the viewing side of the user. According to the embodiment of the invention, the visual angle of the polarizing plate is increased by arranging the half-wave plates, and the half-wave plates are used for compensating the problem of color distortion generated by a user under the condition of squint, so that the purpose of improving the visual angle of the user is achieved.

Description

Technical Field

[0001] This application relates to a display device, and more particularly to a display device that can improve viewing angle problems. Background Technology

[0002] Generally, a monitor may include at least components such as a backlight and a display panel. The backlight provides the light source required for the monitor to display images. The display panel controls the direction of the light source through its internal components such as polarizing plates, liquid crystal materials, alignment films, and driving electrodes, so that users can receive the expected light to view the display screen.

[0003] However, when users view the monitor's display screen at a viewing angle other than 0°, the display effect will be affected by the directionality of light, resulting in color distortion and a poor viewing experience for the user.

[0004] Therefore, how to propose a display device that can improve the viewing angle problem is one of the problems that urgently need to be solved in this field. Summary of the Invention

[0005] This application provides a display device that, by using a polarizing plate to pass through a wave plate, can compensate for the viewing angle according to the user's viewing angle, so that when the user views the display device at a viewing angle other than 0°, the user can still observe the expected color distribution, thereby improving the viewing angle problem.

[0006] One embodiment of this application provides a display device including a backlight module, a display panel, and a polarizing plate. The display panel is disposed on the backlight module, and the polarizing plate is disposed on the display panel. The polarizing plate includes a quarter-wave plate, a first half-wave plate, a second half-wave plate, and a polarizing element. The quarter-wave plate is disposed on the display panel and configured to generate first polarized light having a first polarization direction. The first half-wave plate is disposed on the quarter-wave plate and configured to generate second polarized light having a second polarization direction. The second half-wave plate is disposed on the first half-wave plate and configured to generate third polarized light having a third polarization direction. The polarizing element is disposed on the second half-wave plate and faces the user's viewing side, and is configured to generate fourth polarized light having a fourth polarization direction.

[0007] Based on the above, the polarizing plate of the display device provided in this application embodiment is provided with the quarter-wave plate, the first half-wave plate, the second half-wave plate and the polarizing element, and the first half-wave plate and the second half-wave plate are used to compensate for the viewing angle problem caused by the user when viewing the display device at a viewing angle other than 0°, so as to improve the user's viewing angle problem. Attached Figure Description

[0008] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0009] Figure 1 This is a schematic diagram of an embodiment of the display device of this application.

[0010] Figure 2 This is a schematic diagram of an embodiment of the polarizing plate of this application.

[0011] Figure 3 This is a schematic diagram of an embodiment of the polarization direction of the polarizing plate of this application.

[0012] Figure 4 This is a schematic diagram of another polarization direction embodiment of the polarizing plate of this application.

[0013] Figure 5 This is a diagram illustrating how the user will view the content. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] Please see Figure 1 , Figure 1 This is a schematic diagram of an embodiment of the display device of this application. The display device 1 includes a backlight module 100, a polarizing plate 400, a display panel 200, and a polarizing plate 300.

[0016] In this embodiment, the backlight module 100 is used to provide light emitted to the display panel 200 to provide the light source required for the display device 1 to display an image. The backlight module 100 may include at least components such as a light source, a light guide plate, and a diffuser. In one embodiment, the backlight module 100 may be a light-emitting diode backlight module, and this application is not limited thereto.

[0017] In this embodiment, the polarizing plate 400 is disposed on the backlight module 100, and converts the light generated by the backlight module 100 into polarized light and provides it to the display panel 200.

[0018] In this embodiment, the display panel 200 is disposed on the backlight module 100 and on the polarizing plate 400. The display panel 200, the backlight module 100, and the polarizing plate 400 are integrated to generate light for imaging. The display panel 200 may include at least components such as driving electrodes, a liquid crystal molecule layer, and a filter. In one embodiment, the display panel 200 may be a vertically aligned (VA) liquid crystal panel, a birefringence controlled (ECB) liquid crystal panel, a twisted nematic (TN) liquid crystal panel, or a multi-domain twisted nematic (MTN) liquid crystal panel, and this application is not limited thereto.

[0019] In one embodiment, the display device 1 may be a semi-transparent display device or a transmissive display device, and this application is not limited thereto.

[0020] Please also refer to Figure 1 , Figure 2 and Figure 3 . Figure 2 This is a schematic diagram of an embodiment of the polarizing plate of this application. Figure 3 This is a schematic diagram of the polarization direction of the polarizing plate of this application. In this embodiment, the polarizing plate 300 is disposed on the display panel 200 and faces the user's viewing side. The polarizing plate 300 includes a quarter-wave plate 310, a first half-wave plate 320, a second half-wave plate 330, and a polarizer 340.

[0021] In this embodiment, the quarter-wave plate 310 is configured to generate first polarized light having a first polarization direction 311. In this embodiment, the first half-wave plate 320 is disposed on the quarter-wave plate 310 and configured to generate second polarized light having a second polarization direction 321. The second half-wave plate 330 is disposed on the first half-wave plate 320 and configured to generate third polarized light having a third polarization direction 331. In this embodiment, the polarizer 340 is disposed on the second half-wave plate 330 and configured to generate fourth polarized light having a fourth polarization direction 341, facing the user's viewing side.

[0022] In one embodiment, the wavelength of the first polarized light is between 100 nanometers and 160 nanometers, and this application is not limited thereto. In one embodiment, the wavelengths of the second polarized light and the third polarized light are between 240 nanometers and 290 nanometers, and this application is not limited thereto.

[0023] Furthermore, the polarizing plate 300 can define a first axis X and a second axis Y, which are perpendicular to each other. In one embodiment, the first axis X is the slow axis of the quarter-wave plate 310, the first half-wave plate 320, or the second half-wave plate 330, and the second axis Y is the fast axis of the quarter-wave plate 310, the first half-wave plate 320, or the second half-wave plate 330. In this embodiment, the polarization directions are sequentially arranged counterclockwise from the second axis Y as the fourth polarization direction 341, the third polarization direction 331, the second polarization direction 321, and the first polarization direction 311.

[0024] Furthermore, a first angle θ1 exists between the first polarization direction 311 and the second polarization direction 321, a second angle θ2 exists between the second polarization direction 321 and the third polarization direction 331, and a third angle θ3 exists between the third polarization direction 331 and the fourth polarization direction 341. The first angle θ1, the second angle θ2, and the third angle θ3 are all greater than 0 degrees and less than 180 degrees. The first angle θ1, the second angle θ2, and the third angle θ3 are different from each other.

[0025] Furthermore, the second angle θ2 is greater than 45 degrees and less than 135 degrees to achieve a better compensation effect. In one embodiment, the first angle θ1 and the third angle θ3 are also greater than 45 degrees.

[0026] Please refer to Table 1. Table 1 is... Figure 3 An example of the first angle θ1, the second angle θ2, and the third angle θ3 in the embodiment. Table 1

[0027] In this embodiment, numbers A01 to A06 represent different combinations of angle embodiments. Furthermore, as the second angle θ2 increases, the polarizing plate 300 can transmit light through the second angle θ2, thus achieving a better compensation effect. For example, number A06 has a better compensation effect than number A01.

[0028] Furthermore, the angle difference between the first angle θ1 minus the second angle θ2 and the third angle θ3 is proportional to 45 degrees. As shown below, where n is a positive integer greater than or equal to 1. θ1-|(θ2-θ3)|=n×45°

[0029] Please also refer to Figure 3 and Figure 4 , Figure 4This is a schematic diagram of another polarization direction of the polarizing plate in this application. Figure 4 Examples and Figure 3 The difference lies in the fact that, from the second axis Y in a counterclockwise direction, the polarization directions are sequentially the third polarization direction 331, the fourth polarization direction 341, the second polarization direction 321, and the first polarization direction 311, and the fourth polarization direction 341 is in the same direction as the first axis X. That is, the polarization directions of the first polarization direction 311, the second polarization direction 321, the third polarization direction 331, and the fourth polarization direction 341 in this application are not the same as those in this application. Figure 3 and Figure 4 The illustration is for limitation purposes.

[0030] Please refer to Table 2. Table 2 is... Figure 4 An example of the first angle θ1, the second angle θ2, and the third angle θ3 in the embodiment. serial number <![CDATA[θ1]]> <![CDATA[θ2]]> <![CDATA[θ3]]> B01 150 45 300 B02 195 90 300 B03 240 135 300 B04 240 45 300 B05 285 90 300 B06 330 135 300 Table 2

[0031] In this embodiment, numbers B01 to B06 represent different combinations of angle embodiments. Furthermore, as the second angle θ2 increases, the polarizing plate 300 can achieve a better compensation effect by allowing the second angle θ2 to pass through. For example, number B06 has a better compensation effect than number B01.

[0032] Please also refer to Figure 3 and Figure 5 , Figure 5 This is a visual illustration for the user's viewing experience. Figure 5In this embodiment, the user can be positioned on one side (e.g., side A or side B) of the display device 1 and view it. In one embodiment, when the user views from a 0° viewing angle, they can receive the expected polarized light, resulting in a color-distortion-free display effect. In another embodiment, when the user is positioned on side A of the display device 1 and views at an angle of 30° or 75°, the first angle θ1 increases, the second angle θ2 increases, and the third angle θ3 decreases. However, because the polarizing plate 300 of this application possesses the characteristics of the above formula, the angle difference between the first angle θ1 minus the second angle θ2 and the third angle θ3 can be maintained in a relationship proportional to 45°. Therefore, the user can still receive the expected polarized light even when viewing at an angle, resulting in a color-distortion-free display effect. In another embodiment, when the user is positioned on side B of the display device 1 and views at an angle of 30° or 75°, the first angle θ1 decreases, the second angle θ2 decreases, and the third angle θ3 decreases. In this embodiment, the first angle θ1, the second angle θ2, and the third angle θ3 are reduced simultaneously. Therefore, the angle difference between the first angle θ1 minus the second angle θ2 and the third angle θ3 can be maintained in a relationship proportional to 45°. The user can still receive the expected polarized light even when looking at the screen at an angle, thus producing a display effect without color distortion.

[0033] Therefore, the display device 1 of this application increases the viewing angle of the display device 1 by setting the polarizing plate 300, using the first half-wave plate 320 and the second half-wave plate 330 of the polarizing plate 300, and through the compensation effect between the quarter-wave plate 310, the first half-wave plate 320 and the second half-wave plate 330 of the polarizing plate 300 and the polarizing plate 340, so that the quarter-wave plate 310, the first half-wave plate 320 and the second half-wave plate 330 and the polarizing plate 340 maintain the relationship of the above formula, thereby achieving a display effect without color distortion.

[0034] In summary, since the display device embodiment of this application is provided with the aforementioned polarizing plate, and the polarizing plate is provided with a plurality of half-wave plates, the viewing angle of the polarizing plate is increased by the plurality of half-wave plates, and the plurality of half-wave plates are used to compensate for the color distortion problem caused by the user looking at an angle, thereby achieving the purpose of improving the user's viewing angle.

[0035] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0036] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms fall within the scope of protection of this application.

Claims

1. A display device, characterized in that, include: Backlight module; The display panel is disposed on the backlight module; and A polarizing plate is disposed on the display panel; The polarizing plate includes: A quarter-wave plate, disposed on the display panel, is configured to generate first polarized light having a first polarization direction; A first half-wave plate, disposed on the quarter-wave plate, is configured to generate second polarized light having a second polarization direction; A second half-wave plate, disposed on the first half-wave plate, is configured to generate third-polarized light having a third polarization direction; and A polarizing element, disposed on the second half-wave plate and facing the user's viewing side, is configured to generate fourth polarized light having a fourth polarization direction.

2. The display device as claimed in claim 1, characterized in that, The first polarization direction and the second polarization direction have a first angle, the second polarization direction and the third polarization direction have a second angle, the third polarization direction and the fourth polarization direction have a third angle, and the difference between the first angle and the second angle and the third angle is proportional to 45 degrees.

3. The display device as claimed in claim 2, characterized in that, The first angle, the second angle, and the third angle are greater than 0 degrees and less than 180 degrees.

4. The display device as claimed in claim 2, characterized in that, The first angle, the second angle, and the third angle are different from each other.

5. The display device as claimed in claim 2, characterized in that, The second angle is greater than 45 degrees and less than 135 degrees.

6. The display device as claimed in claim 5, characterized in that, The first angle and the third angle are greater than 45 degrees.

7. The display device as claimed in claim 1, characterized in that, The wavelength of the first polarized light is between 100 nanometers and 160 nanometers.

8. The display device as claimed in claim 1, characterized in that, The wavelengths of the second polarized light and the third polarized light are between 240 nanometers and 290 nanometers.

9. The display device as claimed in claim 1, characterized in that, The display panel includes a vertically aligned liquid crystal panel, a birefringence controlled liquid crystal panel, a twisted nematic liquid crystal panel, or a multi-domain twisted nematic liquid crystal panel.

10. The display device as claimed in claim 1, characterized in that, The backlight module is a light-emitting diode backlight module.

11. The display device as claimed in claim 1, characterized in that, The display device is a semi-transparent display device or a transmissive display device.

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