Display device

Abstract

A display device comprises a color temperature sensor, an arithmetic unit, a gamma unit and a display panel. The color temperature sensor is used for sensing the color temperature of ambient light and outputting target white point information. The operation unit is coupled to the color temperature unit and is used for calculating adjustment factors corresponding to red, green and blue according to the target white point information. The gamma unit is coupled to the arithmetic unit and is used for receiving the adjustment factors and adjusting gamma curves corresponding to red, green and blue. The display panel comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel, the display panel is coupled with the gamma unit and used for receiving an image signal, and the display panel provides corresponding data material signals to the red sub-pixel, the green sub-pixel and the blue sub-pixel according to gamma curves corresponding to red, green and blue.

Description

TECHNICAL FIELD

[0001] The present application relates to a display device, in particular, a display device adjusting display effect according to ambient light. BACKGROUND

[0002] In certain application scenarios, strong specular reflection light can reduce the visibility of the screen of the display device, resulting in difficulty in reading information. Although existing methods can set special coatings on the screen of the display device, a small amount of reflected light and glare can still be generated, which cannot allow the user to obtain the experience of watching paper. In addition, the color temperature of ambient light can also affect the display effect of the display device, and existing display devices cannot provide different display effects as the color temperature of ambient light changes, so users often feel a lack of immersion.

[0003] Therefore, there is a need for a novel display device to improve the above problems. SUMMARY

[0004] The present application provides a display device. The display device includes a color temperature sensor, an operation unit, a gamma unit and a display panel. The color temperature sensor is used to sense the color temperature of ambient light and output a target white point information. The operation unit is coupled to the color temperature sensor, and is used to calculate three adjustment factors corresponding to red, green and blue according to the target white point information. The gamma unit is coupled to the operation unit, and is used to receive the adjustment factors and adjust the gamma curves corresponding to red, green and blue. The display panel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, wherein the display panel is coupled to the gamma unit, and is used to receive an image signal, and the display panel provides a corresponding data signal to the red sub-pixel, the green sub-pixel and the blue sub-pixel according to the gamma curves corresponding to red, green and blue. BRIEF DESCRIPTION OF DRAWINGS

[0005] FIG. 1A is a schematic diagram of a display device of a first embodiment of the present application.

[0006] FIG. 1B is a schematic diagram of the operation process of the operation unit of the first embodiment of the present application.

[0007] FIG. 2A is a schematic diagram of a display device of a second embodiment of the present application.

[0008] FIG. 2B is a schematic diagram of the operation process of the operation unit of the second embodiment of the present application.

[0009] FIGS. 2C-2E is a schematic diagram of the chromaticity, gamma curve and backlight brightness of the display panel of an embodiment of the present application.

[0010] FIG. 3AFIG. 1 is a schematic diagram of a display device according to a third embodiment of the present application.

[0011] FIG. 3B FIG. 2 is a circuit diagram of one of the red sub-pixel, the green sub-pixel and the blue sub-pixel according to an embodiment of the present application.

[0012] FIG. 3C FIG. 3 is a signal timing diagram corresponding to one of the red sub-pixel, the green sub-pixel and the blue sub-pixel according to an embodiment of the present application.

[0013] FIG. 4A FIG. 4 is a schematic diagram of a display device according to a fourth embodiment of the present application.

[0014] FIG. 4B FIG. 5 is a schematic diagram of an operation process of an operation unit according to the fourth embodiment of the present application.

[0015] FIG. 5 FIG. 6 is a schematic diagram of a display device according to a fifth embodiment of the present application.

[0016] FIG. 6A FIG. 7 is a schematic diagram of a display device according to a sixth embodiment of the present application.

[0017] FIG. 6B FIG. 8 is a schematic diagram of a gamma curve of a display panel according to an embodiment of the present application.

[0018] FIG. 7 FIG. 9 is a schematic diagram of a display device according to a seventh embodiment of the present application.

[0019] FIGS. 8A-8C FIG. 10 is a schematic diagram of color points of a display device according to an embodiment of the present application when displaying a white picture under different color temperatures of ambient light.

[0020] FIGS. 9A-9C FIG. 11 is a schematic diagram of color points of a display device according to an embodiment of the present application when displaying original content under different color temperatures of ambient light.

[0021] FIG. 10A FIG. 12 is a schematic diagram of a structure of a display device according to an embodiment of the present application.

[0022] FIG. 10B FIG. 13 is a schematic diagram of a structure of a display device according to another embodiment of the present application.

[0023] FIG. 10C FIG. 14 is a schematic diagram of a structure of a display device according to another embodiment of the present application.

[0024] FIG. 11A FIG. 15 is a schematic diagram of a structure of a display device according to another embodiment of the present application. 11B FIG. 16 is a schematic diagram of a structure of a protective layer according to an embodiment of the present application.

[0025] FIG. 11C FIG. 17 is a schematic diagram of a structure of an anti-glare layer according to an embodiment of the present application. 11DFig. 1 is a structural diagram of a protective layer according to another embodiment of the present application.

[0026] In the above figures, the meanings of the marks are as follows:

[0027] Display device 1;

[0028] Color temperature sensor 10;

[0029] Operation unit 20;

[0030] Gamma unit 30;

[0031] Display panel 40;

[0032] Backlight unit 50;

[0033] Tone reproduction curve (TRC) conversion module 21;

[0034] Color space conversion module 22;

[0035] White point conversion module 23;

[0036] Color space inverse conversion module 24;

[0037] TRC inverse conversion module 25;

[0038] Red sub-pixel 61;

[0039] Green sub-pixel 62;

[0040] Blue sub-pixel 63;

[0041] Driving unit 70;

[0042] Data signal DN;

[0043] Information (X, Y, Z) Red, (X, Y, Z) Green, (X, Y, Z) Blue, (X, Y, Z) White of color space;

[0044] Original image signals Rin, Gin, Bin;

[0045] Target white point information (X', Y', Z');

[0046] Color temperature (CCT);

[0047] Adjustment factors KR, KG, KB;

[0048] First conversion signals R, G, B;

[0049] Color point (X, Y, Z);

[0050] First conversion color point ( (X'', Y'', Z'');

[0051] second conversion signals R'', G'', B'';

[0052] image signals Rout, Gout, Bout;

[0053] luminance adjustment factor KL;

[0054] data write transistor SW1;

[0055] drive transistor SW2;

[0056] emission transistor SW3;

[0057] light emitting unit OD;

[0058] first end a1, b1, c1, d1;

[0059] second end a2, b2, c2, d2;

[0060] control end a3, b3, c3;

[0061] data line DL;

[0062] scan line SL;

[0063] scan signal SN;

[0064] high voltage level signal VDD;

[0065] capacitor Cst;

[0066] control signal EM;

[0067] low voltage level signal voltage VEE;

[0068] data write phase Datawrite;

[0069] frame period frame;

[0070] periods TEMon, TEMoff;

[0071] time lengths Ti, Tk, Tf;

[0072] color gamut conversion module 26;

[0073] color points A, B, C, D, E, F;

[0074] color gamut R1, R2, R3;

[0075] optical structure layer 80;

[0076] protective layer 81;

[0077] anti-glare layer 82;

[0078] Anti-reflection layer 83;

[0079] Widths w1, w2;

[0080] Heights h1, h2, h3, h4. DETAILED DESCRIPTION

[0081] Reference will now be made in detail to the exemplary embodiments of the present application, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the different drawings to refer to the same or like parts.

[0082] Throughout this specification and the claims that follow, certain terms can be used to refer to particular components. As one skilled in the art will appreciate, manufacturers can refer to a component by different names. This document does not intend to distinguish between components that differ in name but not in function. In the following description and in the claims, the terms "comprise," "include," and "contain" are open-ended terms that also mean "comprising, but not limited to."

[0083] The terms "about," "substantially," or "approximately" generally mean within 10% of a given value or range, or within 5%, 3%, 2%, 1%, or 0.5% of a given value or range.

[0084] The use of ordinal numbers such as "first," "second," etc., in the specification and claims is used to distinguish between two or more components, and is not meant to limit the order or sequence of the components. The use of ordinal numbers is not meant to limit the order or sequence of the components, and the use of ordinal numbers in the claims does not imply a particular order or sequence. The claims can not use the same ordinal numbers as the specification, and the claims can not use ordinal numbers at all. A first component in the specification can be a second component in the claims.

[0085] In this document, the phrase "a range from a first value to a second value" or "a range falling within a range from a first value to a second value" means that the given range includes the first value, the second value, and other values between them.

[0086] In addition, the display device disclosed in the present application can be applied to an electronic device, which can include an exposure device, a printing device, a three-dimensional printing device, a vehicle device, an image capturing device, an assembling device, a backlight device, an antenna device, a splicing device, a touch electronic device, a curved electronic device, or a free shape electronic device, but is not limited thereto. The display device can include, for example, a liquid crystal, a light emitting diode, a luorescence, a phosphor, other suitable display medium, or a combination thereof, but is not limited thereto. The display device can be a non-self-emissive display device or a self-emissive display device. The antenna device can be a liquid crystal type antenna device or a non-liquid crystal type antenna device, and the sensing device can be a sensing device for sensing capacitance, light, heat energy, or ultrasound, but is not limited thereto. The splicing device can include, for example, a display splicing device or an antenna splicing device, but is not limited thereto. It is to be noted that the electronic device can be any combination of the above, but is not limited thereto. In addition, the electronic device can be a bendable or flexible electronic device. It is to be noted that the electronic device can be any combination of the above, but is not limited thereto. In addition, the electronic device can have a rectangular, circular, polygonal, or other suitable shape. The electronic device can have a driving system, a control system, a light source system, a shelf system, or other peripheral systems to support the display device, the antenna device, or the splicing device.

[0087] It is to be understood that the following examples can be combined, interchanged or reordered in any manner, without departing from the scope of the present application.

[0088] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0089] In addition, terms such as "adjacent" in the specification and claims are used to describe proximity to each other, and the two adjacent objects can or can not be in contact with each other.

[0090] Furthermore, the description in the present application about "when" or "…", etc. represents "when, before or after", etc. and is not limited to the situation of simultaneous occurrence, which is described in advance. The description about "set on" or the like in the present application represents the corresponding position relationship of two elements, and is not limited to whether the two elements are in contact or not, which is described in advance. In addition, when multiple functions are described in the present application, if the word "or" is used between the functions, it means that the functions can exist independently, but it does not exclude that multiple functions can exist at the same time.

[0091] FIG. 1A is a schematic diagram of a display device 1 of a first embodiment of the present application, FIG. 1B is a schematic diagram of an operation process of an operation unit 20 of the first embodiment of the present application.

[0092] As shown in FIG. 1A , the display device 1 can include a color temperature sensor 10, an operation unit 20, a gamma unit 30, a display panel 40 and a backlight unit 50. The operation unit 20 is coupled to the color temperature sensor 10. The display panel 40 is coupled to the operation unit 20 and the gamma unit 30. The operation unit 20 can include a tone reproduction curve (TRC) conversion module 21, a color space conversion module 22, a white point conversion module 23, a color space inverse conversion module 24 and a TRC inverse conversion module 25. The display panel 40 can include an array region (not shown in the figure), which can include at least one red sub-pixel 61, at least one green sub-pixel 62 and at least one blue sub-pixel 63. It should be noted that the number of sub-pixels 61-63 in the figure is not limited, and the present application can actually have more number of sub-pixels 61-63. In an embodiment, the display panel 40 can further include a driving unit 70. In addition, it should be noted that the proportions of the elements presented in the figure do not represent the actual proportions.

[0093] Regarding the functions of the above-mentioned elements. In an embodiment, the color temperature sensor 10 can be used to sense the color temperature of the ambient light, and output a target white point information according to the sensed color temperature, for example, a preset algorithm can be performed by the color temperature sensor 10 to achieve this, and is not limited thereto. The operation unit 20 can calculate three adjustment factors corresponding to red, green and blue according to the target white point information. For example, the TRC conversion module 21 can be used to perform TRC conversion on a signal (such as an original image signal provided by a signal source) (shown in FIG. 1A ), the color space conversion module 22 can be used to convert the TRC converted signal into a color point in a color space (shown in FIG. 1B), the white point conversion module 23 can calculate a plurality of adjustment factors according to the target white point, and can adjust the color point by using the adjustment factors, the color space inverse conversion module 24 can convert the adjusted color point into a new signal, the TRC inverse conversion module 25 can perform TRC inverse conversion on the new signal, and thus an image signal is generated. The display panel 40 can receive the image signal and a gamma curve provided by the gamma unit 30, wherein the driving unit 70 of the display panel 40 can generate a data signal DN according to the image signal and the gamma curve, and can transmit the data signal DN to the red sub-pixel 61, the green sub-pixel 62, and the blue sub-pixel 63. In an embodiment, the data signal DN can include three sub-signals corresponding to the red sub-pixel 61, the green sub-pixel 62, and the blue sub-pixel 63 respectively, but is not limited thereto.

[0094] In an embodiment, when the display panel 40 displays a pure color picture, the operation unit 20 can obtain information of a color space corresponding to the display panel 40 (for example, obtain signals (X, Y, Z) Red of the red pure color picture in the color space, obtain signals (X, Y, Z) Green of the green pure color picture in the color space, obtain signals (X, Y, Z) Blue of the blue pure color picture in the color space, and obtain signals (X, Y, Z) White of the white pure color picture in the color space), and the color space conversion module 22 can be used to convert a signal (for example, a TRC converted signal) into a color point in the color space to provide color gamut information, and the color space inverse conversion module 24 can convert the color point in the color space back to the format of the TRC signal. In addition, in an embodiment, the white point conversion module 23 calculates adjustment factors by using target white point information and information of the color space corresponding to the display panel 40, wherein the adjustment factors can be regarded as the difference between the color temperature of the pure color picture displayed by the display panel 40 and the color temperature of the ambient light, and are not limited thereto.

[0095] In an embodiment, the operation unit 20 can be, for example but not limited to, a processor, a chip, or a system on chip (SOC), wherein the TRC conversion module 21, the color space conversion module 22, the white point conversion module 23, the color space inverse conversion module 24, the TRC inverse conversion module 25, or other functions can be implemented by the operation unit 20 executing one or more algorithms 2, and are not limited thereto. In addition, in an embodiment, the gamma unit 30 can be, for example, provided in a timing controller (not shown in the figure), wherein the functions of the gamma unit 30 described herein can be executed by a processor (not shown in the figure) in the timing controller, and are not limited thereto. The backlight unit 50 can be, for example, a backlight panel, and is not limited thereto. In an embodiment, the gamma unit 30, the display panel 40, and / or the backlight unit 50 can be regarded as at least part of a display module 3, and are not limited thereto.

[0096] Next, the operation of the computing unit 20 will be described. FIG. 1A and FIG. 1BAs shown, in an embodiment, a signal source (not shown) can provide original image signals (Rin, Gin, Bin) to the operation unit 20, wherein the original image signals (Rin, Gin, Bin) can include a sub-signal Rin for the red sub-pixel 61, a sub-signal Gin for the green sub-pixel 62, and a sub-signal Bin for the blue sub-pixel 63. In an embodiment, the sub-signals Rin, Gin, Bin respectively correspond to a gray scale value of red, green, and blue, and are not limited thereto. In addition, the color temperature sensor 10 can sense the color temperature of ambient light to output target white point information (e.g., at least one of (X', Y', Z') and (color temperature (hereinafter referred to as CCT)), and are not limited thereto). In addition, the operation unit 20 can obtain information of a color space corresponding to a pure color picture displayed by the display panel 40, and obtain an actual white point in the color space, wherein the difference between the actual white point and the target white point information (at least one of (X', Y', Z') and (CCT), and are not limited thereto) can be regarded as the difference between the color temperature of the display panel 40 displaying and the color temperature of the ambient light, and are not limited thereto. Then, the TRC conversion module 21 can perform TRC conversion on the original image signals (Rin, Gin, Bin) to form a first conversion signal (R', G', B'). Then, the color space conversion module 22 can convert the first conversion signal (R', G', B') into a color point (X, Y, Z) in the color space corresponding to the display panel 40. Then, the white point conversion module 23 can calculate three adjustment factors KR, KG, KB corresponding to red, green, and blue according to the target white point information (at least one of (X', Y', Z') and (CCT), and are not limited thereto), wherein the white point conversion module 23 can perform white point conversion on the actual white point according to the target white point information (at least one of (X', Y', Z') and (CCT), and are not limited thereto), and obtain the three adjustment factors KR, KG, KB corresponding to red, green, and blue from the conversion process, and are not limited thereto. Then, the white point conversion module 23 converts the color point (X, Y, Z) using the three adjustment factors KR, KG, KB corresponding to red, green, and blue to adjust the color point (X, Y, Z) into a first conversion color point (X'', Y'', Z''). The color space inverse conversion module 24 can convert the first conversion color point (X'', Y'', Z'') into a second conversion signal (R'', G'', B''). The TRC inverse conversion module 25 can perform TRC inverse conversion on the second conversion signal (R'', G'', B'') to generate image signals (Rout, Gout, Bout) provided to the display panel 40.Then, the driving unit 70 of the display panel 40 can generate data signals DN for the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 respectively according to the image signals (Rout, Gout, Bout) and the gamma curve provided by the gamma unit 30.

[0097] Through the operation of the operation unit 20, the original image signals (Rin, Gin, Bin) can be converted into new image signals (Rout, Gout, Bout) according to the color temperature of the current ambient light, so that the color temperature of the picture displayed by the display panel 40 can be closer to the color temperature of the ambient light, and thus the display quality of the display device 1 can be improved.

[0098] In an embodiment, through the operation of the color temperature conversion of the aforementioned operation unit 20, since the original image signals (Rin, Gin, Bin) are converted, when the color temperature displayed by the display panel 40 is lowered after conversion, the color quantity displayed by the display panel 40 can be lowered along with the lowering of the color temperature. In addition, the backlight brightness in the display panel 40 can also be lowered along with the lowering of the color temperature. In addition, the gamma curves corresponding to the sub-signals Rout, Gout and Bout in the image signals (Rout, Gout, Bout) obtained by the display panel 40 are consistent, and are not limited thereto.

[0099] Therefore, the first embodiment can be understood.

[0100] FIG. 2A is a schematic diagram of a display device 1 of a second embodiment of the present application, FIG. 2B is a schematic diagram of an operation process of an operation unit 20 of the second embodiment of the present application. FIG. 2A Embodiments can be generally applicable FIG. 1A The following mainly describes the differences between the embodiments.

[0101] As FIG. 2A shown, the display device 1 can include a color temperature sensor 10, an operation unit 20, a gamma unit 30, a display panel 40 and a backlight unit 50, wherein the display panel 40 includes a red sub-pixel 61, a green sub-pixel 62 and a blue sub-pixel 63. Unlike FIG. 1A the embodiment, FIG. 2A The operation unit 20 of the embodiment can include a color space conversion module 22 and a white point conversion module 23, and the gamma unit 30 and the backlight unit 50 can be coupled to the operation unit 20. In addition, the image signals input to the display panel 40 can be original image signals (Rin, Gin, Bin).

[0102] Then, the detailed operation of the display device 1 and the operation unit 20 will be described. As FIG. 2A and 2BIn one embodiment, color temperature sensor 10 senses the color temperature of ambient light to output target white point information (at least one of (X', Y', Z') and (CCT), but not limited thereto), and operation unit 20 can obtain information of a color space corresponding to the color of a pure color picture displayed by display panel 40. Then, color space conversion module 22 can find an actual white point (not shown in the figure) from the color space corresponding to display panel 40. Then, white point conversion module 23 can calculate three adjustment factors KR, KG, KB corresponding to red, green and blue and a luminance adjustment factor KL according to target white point information (at least one of (X', Y', Z') and (CCT), but not limited thereto), wherein white point conversion module 23 can perform white point conversion on the actual white point according to target white point information (at least one of (X', Y', Z') and (CCT), but not limited thereto) (for example, to find the difference between target white point information (at least one of (X', Y', Z') and (CCT), but not limited thereto) and the actual white point), and calculate the three adjustment factors KR, KG, KB corresponding to red, green and blue and the luminance adjustment factor KL from the conversion process, but not limited thereto. Signal source (not shown in the figure) can directly provide original image signals (Rin, Gin, Bin) to display panel 40. Operation unit 20 can provide the three adjustment factors KR, KG, KB corresponding to red, green and blue to gamma unit 30, and operation unit 50 can provide luminance adjustment factor KL to backlight unit 50. Gamma unit 30 can adjust the gamma curve provided to driving unit 70 according to the three adjustment factors KR, KG, KB corresponding to red, green and blue. Driving unit 70 generates data signals DN according to original image signals (Rin, Gin, Bin) and the adjusted gamma curve, and provides data signals DN to red sub-pixel 61, green sub-pixel 62 and blue sub-pixel 63. Backlight unit 50 adjusts the backlight brightness provided to display panel 40 according to luminance adjustment factor KL.

[0103] Through the operation of operation unit 20, gamma unit 30 can adjust the gamma curve according to the color temperature of ambient light, and backlight unit 50 can adjust the backlight brightness according to the color temperature of ambient light, so that the color temperature of the picture displayed by display panel 40 can be close to the color temperature of ambient light, and thus the display quality of display device 1 can be improved.

[0104] FIGS. 2C-2E is a schematic diagram of the chromaticity, gamma curve and backlight brightness of display panel 40 in one embodiment of the present application, which corresponds to FIG. 2A and FIG. 2B and are respectively used to display the change of the chromaticity, gamma curve and backlight brightness of display panel 40 when the color temperature of ambient light changes after the operation of operation unit 20.

[0105] AsFIG. 2C As shown, in the present embodiment, the original image signals (Rin, Gin, Bin) are not converted but directly received by the display panel 40 during the operation of the operation unit 20, so when the color temperature displayed by the display panel 40 is converted to be lowered, the number of colors of the display panel 40 can be maintained without being lowered. In addition, as shown, after the operation of the operation unit 20, the gamma unit 30 provides three gamma curves corresponding to red, green and blue in a non-linear state according to the three adjustment factors KR, KG, KB corresponding to red, green and blue, that is, the gamma unit 30 can adjust the gamma curves according to the color temperature of the ambient light. In addition, as shown, after the operation of the operation unit 20, when the color temperature displayed by the display panel 40 is converted to be lowered, the backlight unit 50 can adjust the backlight brightness so that the backlight brightness of the display panel 40 is maintained unchanged, and is not limited thereto. FIG. 2D As shown, in the present embodiment, the original image signals (Rin, Gin, Bin) are not converted but directly received by the display panel 40 during the operation of the operation unit 20, so when the color temperature displayed by the display panel 40 is converted to be lowered, the number of colors of the display panel 40 can be maintained without being lowered. In addition, as shown, after the operation of the operation unit 20, the gamma unit 30 provides three gamma curves corresponding to red, green and blue in a non-linear state according to the three adjustment factors KR, KG, KB corresponding to red, green and blue, that is, the gamma unit 30 can adjust the gamma curves according to the color temperature of the ambient light. In addition, as shown, after the operation of the operation unit 20, when the color temperature displayed by the display panel 40 is converted to be lowered, the backlight unit 50 can adjust the backlight brightness so that the backlight brightness of the display panel 40 is maintained unchanged, and is not limited thereto. FIG. 2E As shown, in the present embodiment, the original image signals (Rin, Gin, Bin) are not converted but directly received by the display panel 40 during the operation of the operation unit 20, so when the color temperature displayed by the display panel 40 is converted to be lowered, the number of colors of the display panel 40 can be maintained without being lowered. In addition, as shown, after the operation of the operation unit 20, the gamma unit 30 provides three gamma curves corresponding to red, green and blue in a non-linear state according to the three adjustment factors KR, KG, KB corresponding to red, green and blue, that is, the gamma unit 30 can adjust the gamma curves according to the color temperature of the ambient light. In addition, as shown, after the operation of the operation unit 20, when the color temperature displayed by the display panel 40 is converted to be lowered, the backlight unit 50 can adjust the backlight brightness so that the backlight brightness of the display panel 40 is maintained unchanged, and is not limited thereto.

[0106] Therefore, the second embodiment can be understood.

[0107] The display device 1 of the present application can have different embodiments. FIG. 3A FIG. 1 is a schematic diagram of a display device 1 of a third embodiment of the present application. FIG. 3A The embodiments can be generally applicable FIG. 2A The description of the embodiments, so the following mainly describes the differences.

[0108] In FIG. 3A In the present embodiment, the display panel 40 is a self-luminous display panel, so the display device 1 can include the color temperature sensor 10, the operation unit 20, the gamma unit 30 and the display panel 40, wherein the display panel 40 includes red sub-pixels 61, green sub-pixels 62 and blue sub-pixels 63, and each of the red sub-pixels 61, the green sub-pixels 62 and the blue sub-pixels 63 can include, for example, a self-luminous unit, which can be, for example, an organic light-emitting diode (OLED), but is not limited thereto. Similarly FIG. 2A In the present embodiment, the display panel 40 is a self-luminous display panel, so the display device 1 can include the color temperature sensor 10, the operation unit 20, the gamma unit 30 and the display panel 40, wherein the display panel 40 includes red sub-pixels 61, green sub-pixels 62 and blue sub-pixels 63, and each of the red sub-pixels 61, the green sub-pixels 62 and the blue sub-pixels 63 can include, for example, a self-luminous unit, which can be, for example, an organic light-emitting diode (OLED), but is not limited thereto. Similarly

[0109] Next, the operation of the operation unit 20 will be described with reference to FIGS. 2 and 3. FIG. 2B and FIG. 3AIn one embodiment, the color temperature sensor 10 can sense the color temperature of the ambient light to output target white point information (at least one of (X', Y', Z') and (CCT), and the like), and the operation unit 20 can obtain information of a color space corresponding to a display panel 40 displaying a pure color picture. Then, the color space conversion module 22 can find an actual white point from the color space corresponding to the display panel 40. Then, the white point conversion module 23 can calculate three adjustment factors KR, KG, KB corresponding to red, green and blue and a luminance adjustment factor KL according to the target white point information (at least one of (X', Y', Z') and (CCT), and the like), wherein the white point conversion module 23 can perform white point conversion on the actual white point according to the target white point information (at least one of (X', Y', Z') and (CCT), and the like), and calculate the three adjustment factors KR, KG, KB corresponding to red, green and blue and the luminance adjustment factor KL from the conversion process, and the like. A signal source (not shown) can provide original image signals (Rin, Gin, Bin) to the display panel 40. The operation unit 20 can provide the three adjustment factors KR, KG, KB corresponding to red, green and blue to the gamma unit 30, and the operation unit 20 can provide the luminance adjustment factor KL to the display panel 40. The gamma unit 30 can adjust the gamma curve provided to the driving unit 70 according to the three adjustment factors KR, KG, KB corresponding to red, green and blue. The driving unit 70 generates data signals DN according to the original image signals (Rin, Gin, Bin) and the adjusted gamma curve, and provides the data signals DN to the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63. In addition, the display panel 40 receives the luminance adjustment factor KL, and adjusts the luminance of the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 according to the luminance adjustment factor KL.

[0110] Further details of the display panel 40 adjusting the luminance of the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 according to the luminance adjustment factor KL are described as follows. FIG. 3B is a circuit diagram of one of the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 (hereinafter referred to as the sub-pixel) of one embodiment of the present application, FIG. 3C is a signal timing diagram corresponding to the sub-pixel of one embodiment of the present application.

[0111] As FIG. 3BAs shown, the sub-pixel circuit structure may include a data write transistor SW1, a drive transistor SW2, an emission transistor SW3, and a light-emitting unit OD. The data write transistor SW1 may include a first terminal a1, a second terminal a2, and a control terminal a3. The drive transistor SW2 may include a first terminal b1, a second terminal b2, and a control terminal b3. The emission transistor SW3 may include a first terminal c1, a second terminal c2, and a control terminal c3. The light-emitting unit OD may include a first terminal d1 and a second terminal d2.

[0112] In one embodiment, a first terminal a1 of the data write transistor SW1 may be coupled to a data line DL and configured to receive a data signal DN. A first terminal a2 of the data write transistor SW1 may be coupled to a control terminal b3 of the drive transistor SW2. The control terminal a3 of the data write transistor SW1 may be coupled to a scan line SL and configured to receive a scan signal SN. A first terminal b1 of the drive transistor SW2 may be coupled to a high voltage level signal VDD. A capacitor Cst may be disposed between a second terminal a2 of the data write transistor SW1 and the first terminal b1 of the drive transistor SW2. The second terminal b2 of the drive transistor SW2 may be coupled to a first terminal c1 of the emission transistor SW3. The emission transistor SW3 is coupled between the drive transistor SW2 and the light-emitting unit OD and configured to receive a brightness adjustment factor KL. For example, the second terminal c2 of the emission transistor SW3 may be electrically connected to the first terminal d1 of the light-emitting unit OD. The control terminal c3 of the emission transistor SW3 may be configured to receive a control signal EM. The control signal EM is adjusted based on the brightness adjustment factor KL, but is not limited thereto. The second end d2 of the light emitting unit OD can be electrically connected to a low voltage level signal VEE.

[0113] In addition, FIG. 3B In the embodiment, the data writing transistor SW1, the driving transistor SW2 and the transmitting transistor SW3 are exemplified by a PMOS structure. Therefore, the transistors SW1 to SW3 are normally turned on when the signal received at the control terminal a3, b3 or c3 is a low voltage, and are normally turned off when the signal received at the control terminal a3, b3 or c3 is a high voltage, and the present invention is not limited thereto.

[0114] like FIG. 3CAs shown, in a data write stage (indicated as Datawrite) of a frame (indicated as frame), the scan signal SN is at a low voltage level, at this time the data write transistor SW1 is open, the transistors SW2 and SW3 are closed, and the data signal DN can be taken by the data write transistor SW1. Then, the driving transistor SW can be open under the influence of the data write transistor SW1. Then, in an emission stage, the scan signal SN is changed from the low voltage level to the high voltage level, so the data write transistor SW1 is closed, and the control signal EM received by the control end c3 of the emission transistor SW3 is changed from the high voltage level to the low voltage level, so the emission transistor SW3 is open (this period is indicated as TEMon), at this time the specific current determined by the data signal DN is transmitted to the light emitting unit OD through the driving transistor SW2 and the emission transistor SW3, and then the light emitting unit OD emits light. When the control signal EM is changed from the low voltage level to the high voltage level, the emission transistor SW3 is closed (this period is indicated as TEMoff).

[0115] Further, in an embodiment, by adjusting the duty of the low voltage level period of the control signal EM in a frame period, the brightness of the light emitted by the light emitting unit OD can be adjusted. In an embodiment, the control signal EM is adjusted according to the brightness adjustment factor KL, so the brightness of the display panel 40 can be adjusted. As shown, FIG. 3C As shown, the low voltage level period of the control signal EM in the frame period is indicated as TEMon, the high voltage level period of the control signal EM in the frame period is indicated as TEMoff, the time length of the low voltage level period TEMon of the control signal EM is indicated as Ti, the time length of the low voltage level period TEMon of the control signal EM adjusted according to the brightness adjustment factor KL is indicated as Tk, and the time length of the frame period is indicated as Tf. In an embodiment, the parameters of the duty PWM of the control signal EM can satisfy the following conditions:

[0116] ;

[0117] .

[0118] Wherein KL is the brightness adjustment factor, PWM is the duty of the control signal EM, PWMk is the duty of the control signal EM adjusted according to the brightness adjustment factor KL, and PWMi is the initial duty of the control signal EM.

[0119] Therefore, the third embodiment can be understood.

[0120] The display device 1 of the present application can have different embodiments. FIG. 4A is a schematic diagram of the display device 1 of the fourth embodiment of the present application. FIG. 4A The embodiments can be generally appliedFIG. 1A The following description will mainly focus on the differences between the embodiments.

[0121] like FIG. 4A As shown, the display device 1 may include a color temperature sensor 10, a computing unit 20, a gamma unit 30, a display panel 40, and a backlight unit 50. The computing unit 20 is coupled to the color temperature sensor 10. The display panel 40 is coupled to the computing unit 20 and the gamma unit 30. The computing unit 20 may include a TRC conversion module 21, a color space conversion module 22, a white point conversion module 23, a color space inverse conversion module 24, and a TRC inverse conversion module 25. In addition, the computing unit 20 may also include a color gamut conversion module 26. The display panel 40 may include a red sub-pixel 61, a green sub-pixel 62, and a blue sub-pixel 63, and a driving unit 70. The color gamut conversion module 26 may be coupled to the color temperature sensor 10.

[0122] In one embodiment, the display device 1 can be used to display an image corresponding to original content, where the original content may include, but is not limited to, a photograph, a painting, or a picture. Typically, such original content may have a narrower color gamut or a smaller color range. For example, the original content may display less vivid colors or a smaller color range. Therefore, when the original image signal (Rin, Gin, Bin) is an image signal corresponding to the original content, although the color space conversion module 22 can convert the original image signal (Rin, Gin, Bin) to the color space corresponding to the display panel 40, the color gamut of the color space corresponding to the display panel 40 may be wider or have an excessive color range, thereby failing to accurately represent the color variations of the original content. Consequently, the color distribution of the image displayed on the display panel 40 may differ from that of the original content. In this embodiment, the signal after color space conversion can be further subjected to a color gamut conversion (GCM) by the color gamut conversion module 26 to convert it into the color gamut corresponding to the original content, such as a color gamut with a narrower or smaller color range. In one embodiment, the color gamut conversion module 26 may include information about a target color gamut of the original content under ambient light, but is not limited thereto. Thus, the computing unit 20 can convert the original image signal (Rin, Gin, Bin) based on the target color gamut information provided by the color gamut conversion module 26 and the target white point information output by the color temperature sensor 10 to generate the image signal (Rout, Gout, Bout). This allows the color temperature and color distribution of the image displayed on the display panel 40 to approximate the appearance of the physical original content (e.g., a physical photo, painting, or image) under ambient light.

[0123] Next, detailed operations of the display device 1 and the computing unit 20 will be described. FIG. 4B This is a schematic diagram of the operation process of the computing unit 20 of the fourth embodiment of the present application, and please also refer toFIG. 4A .

[0124] like FIG. 4A and FIG. 4B As shown, in one embodiment, a signal source (not shown) can provide a raw image signal (Rin, Gin, Bin) to the computing unit 20. Furthermore, the color temperature sensor 10 can sense the color temperature of the ambient light to output target white point information (at least one of (X', Y', Z') and (CCT), but not limited thereto). Furthermore, the computing unit 20 can obtain information about the color space corresponding to when the display panel 40 displays a solid color image, and obtain an actual white point in the color space. Next, the TRC conversion module 21 can perform TRC conversion on the raw image signal (Rin, Gin, Bin) to generate a first converted signal (R', G', B'). Next, the color space conversion module 22 can convert the first converted signal (R', G', B') into a color point (X, Y, Z) in the color space corresponding to the display panel 40. Next, the white point conversion module 23 may calculate three adjustment factors KR, KG, and KB corresponding to red, green, and blue based on the target white point information (at least one of, but not limited to, (X', Y', Z') and (CCT)). The white point conversion module 23 may perform white point conversion on the actual white point based on the target white point information (at least one of, but not limited to, (X', Y', Z') and (CCT)) (e.g., to find the difference between the target white point information (at least one of, but not limited to, (X', Y', Z') and (CCT)) and the actual white point), and calculate the three adjustment factors KR, KG, and KB corresponding to red, green, and blue, and a brightness adjustment factor KL from the conversion process. Subsequently, the computing unit 20 may transmit the three adjustment factors KR, KG, and KB corresponding to red, green, and blue to the gamma unit 30 and transmit the brightness adjustment factor KL to the backlight unit 50. Furthermore, the color gamut conversion module 26 performs a color gamut conversion on the color point (X, Y, Z) according to the target color gamut to form a post-gamut conversion color point (not shown). Subsequently, through the operations of the color space inverse conversion module 24 and the TRC inverse conversion module 25 (refer to the previous embodiment), the post-gamut conversion color point (not shown) is converted into an image signal (Rout, Gout, Bout). The computing unit 20 transmits the image signal (Rout, Gout, Bout) to the display panel 40. The gamma unit 30 adjusts the gamma curve provided to the driver unit 70 based on the three adjustment factors KR, KG, and KB corresponding to red, green, and blue. The driver unit 70 generates a data signal DN based on the image signal (Rout, Gout, Bout) and the gamma curve, which is provided to the red sub-pixel 61, the green sub-pixel 62, and the blue sub-pixel 63. The backlight unit 50 adjusts the backlight brightness based on the brightness adjustment factor KL.

[0125] Therefore, the fourth embodiment can be understood.

[0126] The display device 1 of the present application may have different implementation forms. FIG. 5 is a schematic diagram of a display device 1 according to a fifth embodiment of the present application. FIG. 5 The embodiment is generally applicable FIG. 4A The following description of the embodiments mainly focuses on the differences.

[0127] like FIG. 5 As shown, the display device 1 may include a color temperature sensor 10, a computing unit 20, a gamma unit 30, and a display panel 40. The computing unit 20 may include a TRC conversion module 21, a color space conversion module 22, a white point conversion module 23, a color space inverse conversion module 24, a TRC inverse conversion module 25, and a color gamut conversion module 26. The display panel 40 may include a red sub-pixel 61, a green sub-pixel 62, and a blue sub-pixel 63, and the display panel 40 may include a driving unit 70. FIG. 5 In the embodiment, the display panel 40 is a self-luminous display panel, that is, the red sub-pixel 61 , the green sub-pixel 62 and the blue sub-pixel 63 all include a light-emitting unit, and thus the backlight unit 50 of the aforementioned embodiment may not be provided.

[0128] Next, the operation of the computing unit 20 is described. FIG. 4B and FIG. 5In an embodiment, a signal source (not shown) can provide original image signals (Rin, Gin, Bin) to the operation unit 20. The color temperature sensor 10 can sense the color temperature of ambient light to output target white point information (at least one of (X', Y', Z') and (CCT), but not limited thereto). In addition, the operation unit 20 can obtain information of a color space corresponding to a pure color picture displayed by the display panel 40, and obtain an actual white point in the color space. Then, the TRC conversion module 21 can perform TRC conversion on the original image signals (Rin, Gin, Bin) to form first conversion signals (R', G', B'). Then, the color space conversion module 22 can convert the first conversion signals (R', G', B') into a color point (X, Y, Z) in the color space corresponding to the display panel 40. Then, the white point conversion module 23 can calculate three adjustment factors KR, KG, KB corresponding to red, green and blue according to the target white point information (at least one of (X', Y', Z') and (CCT), but not limited thereto), wherein the white point conversion module 23 can perform white point conversion on the actual white point according to the target white point information (at least one of (X', Y', Z') and (CCT), but not limited thereto), and calculate the three adjustment factors KR, KG, KB corresponding to red, green and blue and a luminance adjustment factor KL from the conversion process. Then, the operation unit 20 can transmit the three adjustment factors KR, KG, KB corresponding to red, green and blue to the gamma unit 30, and transmit the luminance adjustment factor KL to the display panel 40. In addition, the color gamut conversion module 26 can perform color gamut conversion on the color point (X, Y, Z) according to a target color gamut to form a color gamut converted color point (not shown). Then, through the operation of the color space inverse conversion module 24 and the TRC inverse conversion module 25, the color gamut converted color point can be converted into image signals (Rout, Gout, Bout), and the operation unit 20 can transmit the image signals (Rout, Gout, Bout) to the display panel 40. The gamma unit 30 can adjust the gamma curve provided to the driving unit 70 according to the three adjustment factors KR, KG, KB corresponding to red, green and blue. The driving unit 70 generates data signals DN provided to the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 according to the image signals (Rout, Gout, Bout) and the gamma curve, and the display panel 40 adjusts the luminance of the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 according to the luminance adjustment factor KL.

[0129] In an embodiment, the circuit structure and the luminance adjustment method of the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 can be applicable to the description of FIG. 3B and FIG. 3C , and will not be described in detail.

[0130] The fifth embodiment can provide the same effects as the fourth embodiment, and can have a self-emitting function. Therefore, the fifth embodiment can be understood.

[0131] The display device 1 of the present application can have different embodiments. FIG. 6A FIG. 1 is a schematic diagram of a display device 1 of a sixth embodiment of the present application. FIG. 6A The embodiments can be generally applicable FIG. 4A The following mainly describes the differences between the embodiments.

[0132] As shown in FIG. 6A , the display device 1 can include a color temperature sensor 10, an operation unit 20, a gamma unit 30, a display panel 40, and a backlight unit 50. The operation unit 20 can include a TRC conversion module 21, a color space conversion module 22, a white point conversion module 23, a color space inverse conversion module 24, and a color gamut conversion module 26. The display panel 40 can include red sub-pixels 61, green sub-pixels 62, and blue sub-pixels 63, and the display panel 40 can include a driving unit 70.

[0133] Next, the operation of the operation unit 20 will be described with reference to FIG. 4B again. As shown in FIG. 6A and FIG. 4BAs shown, in an embodiment, a signal source (not shown) can provide original image signals (Rin, Gin, Bin) to the operation unit 20. The color temperature sensor 10 can sense the color temperature of ambient light to output target white point information (at least one of (X', Y', Z') and (CCT), and the like). In addition, the operation unit 20 can obtain information of a color space corresponding to a pure color picture displayed by the display panel 40, and obtain an actual white point in the color space. Then, the TRC conversion module 21 can perform TRC conversion on the original image signals (Rin, Gin, Bin) to form first conversion signals (R', G', B'). Then, the color space conversion module 22 can convert the first conversion signals (R', G', B') into a color point (X, Y, Z) in the color space corresponding to the display panel 40. Then, the white point conversion module 23 can calculate three adjustment factors KR, KG, KB corresponding to red, green and blue according to the target white point information (at least one of (X', Y', Z') and (CCT), and the like), wherein the white point conversion module 23 can perform white point conversion on the actual white point according to the target white point information (at least one of (X', Y', Z') and (CCT), and the like), and calculate the three adjustment factors KR, KG, KB corresponding to red, green and blue and a luminance adjustment factor KL from the conversion process. Then, the operation unit 20 can transmit the three adjustment factors KR, KG, KB corresponding to red, green and blue to the gamma unit 30, and transmit the luminance adjustment factor KL to the backlight unit 50. In addition, the color gamut conversion module 26 can perform color gamut conversion on the color point (X, Y, Z) according to a target color gamut to form a color point after color gamut conversion (not shown). Then, the color space inverse conversion module 24 converts the color point after color gamut conversion into image signals (Rout, Gout, Bout), and the operation unit 20 can no longer perform TRC inverse conversion, but directly transmits the image signals (Rout, Gout, Bout) to the display panel 40. The gamma unit 30 can adjust the gamma curve provided to the driving unit 70 according to the three adjustment factors KR, KG, KB corresponding to red, green and blue. The driving unit 70 generates data signals DN provided to the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 according to the image signals (Rout, Gout, Bout) and the gamma curve, and the backlight unit 50 adjusts the backlight brightness according to the luminance adjustment factor KL. In an embodiment, TRC inverse conversion can be performed by the gamma unit 30 or the display panel 40, and the like.

[0134] FIG. 6B FIG. 4 is a schematic diagram of a gamma curve of the display panel 40 according to an embodiment of the present application, which can correspond to the color point (X, Y, Z) in the color space corresponding to the display panel 40. FIG. 6ASince the computing unit 20 does not perform TRC inverse conversion on the image signals (Rout, Gout, Bout) in this embodiment, the gamma curves corresponding to red, green, and blue can all be linear. In one embodiment, the gamma unit 30 can adjust the gamma value of the gamma curve to a value, such as 1, based on the adjustment factors KR, KG, and KB, but is not limited thereto.

[0135] Therefore, the sixth embodiment can be understood.

[0136] The display device 1 of the present application may have different implementation forms. FIG. 7 It is a schematic diagram of a display device 1 according to the seventh embodiment of the present application. FIG. 7 The embodiment is generally applicable FIG. 6A The following description of the embodiments mainly focuses on the differences.

[0137] like FIG. 7 As shown, the display device 1 may include a color temperature sensor 10, a computing unit 20, a gamma unit 30, and a display panel 40. The computing unit 20 may include a TRC conversion module 21, a color space conversion module 22, a white point conversion module 23, a color space inverse conversion module 24, and a color gamut conversion module 26. The display panel 40 may include a red sub-pixel 61, a green sub-pixel 62, and a blue sub-pixel 63, and may include a driving unit 70. The display panel 40 of this embodiment is a self-luminous display panel.

[0138] The operation of the computing unit 30 of this embodiment can be roughly referred to FIG. 6A The difference of the embodiment is that the backlight unit 50 may not be provided in this embodiment, so the computing unit 20 may transmit the brightness adjustment factor KL to the display panel 40, and the display panel 40 may adjust the brightness of the red sub-pixel 61, the green sub-pixel 62 and the blue sub-pixel 63 according to the brightness adjustment factor KL.

[0139] Therefore, the seventh embodiment can provide the same effect as the sixth embodiment and can also have the function of self-luminescence. Therefore, the seventh embodiment can be understood.

[0140] FIGS. 8A-8C are schematic diagrams of a display device 1 according to an embodiment of the present application displaying a color point (such as but not limited to a white point) of a white image under different color temperatures of ambient light, and please refer to FIG. 1 to FIG. FIG. 8C .exist FIGS. 8A-8C In the example, a real color point in the ambient light (hereinafter referred to as the target color point) is marked as A, the color point displayed by the display device 1 when the computing unit 20 executes the aforementioned driving method is marked as B, and the color point displayed by the display device 1 when the computing unit 20 does not execute the aforementioned driving method is marked as C. In addition, FIGS. 8A-8CThe CIE1976u'v' color space is used as an example to present the chromaticity difference between the color point of the ambient light and the color point displayed by the display device 1 .

[0141] like FIGS. 8A-8C As shown, when the color temperature of the ambient light is 2778K, 3995K, or 5871K, the position of color point A of the ambient light in the color space is substantially close to the position of color point B of the white image displayed by display device 1 (when computing unit 20 executes the aforementioned driving method), and the position of color point A is far from color point C of the white image displayed by display device 1 (when computing unit 20 does not execute the aforementioned driving method). Therefore, it can be seen that the chromaticity difference between color point A and color point B is smaller than the chromaticity difference between color point A and color point C.

[0142] In one embodiment, the chromaticity difference between color point A, color point B, and color point C may satisfy the equation:

[0143] Δu'v' 20 <Δu'v' 10 ,

[0144] and ,

[0145] and ;

[0146] Where, Δu'v' 10 is the chromaticity difference between the image displayed by the display panel 40 and the ambient light when the computing unit 20 does not execute the aforementioned driving method, Δu'v' 20 is the chromaticity difference between the image displayed by the display panel 40 and the ambient light when the computing unit 20 executes the aforementioned driving method, is the chromaticity of the ambient light, is the chromaticity of the image displayed by the display panel 40 when the computing unit 20 does not execute the aforementioned driving method, is the chromaticity of the image displayed by the display panel 40 when the computing unit 20 executes the aforementioned driving method.

[0147] Therefore, when the computing unit 20 executes the aforementioned driving method, the color temperature of the image displayed by the display panel 40 can change with the color temperature of the ambient light, and the user can experience the same feeling as viewing a physical object under ambient light, thereby enhancing the user's sense of immersion.

[0148] FIGS. 9A-9C are schematic diagrams of a color point (eg, a WRGB color point) of a display device 1 (displaying an original content) according to an embodiment of the present application under different color temperatures of ambient light, and please refer to FIG. 1 to FIG. FIG. 8C .exist FIGS. 9A-9CIn the example, a true color point of the original content under ambient light (hereinafter referred to as the target color point) is labeled D, the color point of the white screen displayed by the display device 1 when the computing unit 20 executes the aforementioned driving method is labeled E, and the color point of the white screen displayed by the display device 1 when the computing unit 20 does not execute the aforementioned driving method is labeled F. In addition, the color gamut of the original content under ambient light is labeled R1, the color gamut provided by the display device 1 when the color gamut conversion module 26 is in operation is labeled R2, and the color gamut provided by the display device 1 when the color gamut conversion module 26 is not in operation is labeled R3. In addition, FIGS. 9A-9C The color space CIE1976u'v' is used as an example to represent the chromaticity difference between the color point of the ambient light and the color point displayed by the display device 1 .

[0149] like FIGS. 9A-9C As shown, when the color temperature of the ambient light is 2778K, 3995K, or 5871K, the position of the color point D of the ambient light in the color space is substantially close to the position of the color point E of the white image displayed by the display device 1 (when the computing unit 20 executes the aforementioned driving method), and the position of the color point D is further away from the color point F of the white image displayed by the display device 1 (when the computing unit 20 does not execute the aforementioned driving method). Therefore, the chromaticity difference between the color point D and the color point E is smaller than the chromaticity difference between the color point D and the color point F. Furthermore, when the color gamut conversion module 26 is operating, the color gamut R2 provided by the display device 1 is close to the color gamut R1 of the original content under ambient light. However, when the color gamut conversion module 26 is not operating, the color gamut R3 provided by the display device 1 differs significantly from the color gamut R1 of the original content under ambient light. Therefore, the operation of the color gamut conversion module 26 can make the image displayed by the display device 1 more similar to the original content under ambient light.

[0150] In one embodiment, the chromaticity difference between color point D, color point E, and color point F may satisfy the equation:

[0151] Δu'v' 53 <Δu'v' 43 ,

[0152] and ,

[0153] and ;

[0154] Where, Δu'v' 43 is the chromaticity difference between the image displayed by the display panel 40 and the original content under ambient light when the computing unit 20 does not execute the aforementioned driving method, Δu'v' 53 is the chromaticity difference between the image displayed by the display panel 40 and the original content under ambient light when the computing unit 20 executes the aforementioned driving method, is the chromaticity of the original content under ambient light, is the chromaticity of the image displayed by the display panel 40 when the computing unit 20 does not execute the aforementioned driving method, is the chromaticity of the image displayed by the display panel 40 when the computing unit 20 executes the aforementioned driving method.

[0155] Therefore, when the computing unit 20 executes the aforementioned driving method, the color temperature of the image displayed by the display panel 40 can change with the color temperature of the ambient light, and the color of the image can be close to the form of a physical object under ambient light. The user can experience the same feeling as viewing a physical object under ambient light, which can enhance the user's sense of immersion.

[0156] In addition, the display panel 40 of the present application can be equipped with a special optical structure layer to enhance display quality. FIG. 10A This is a schematic diagram of the structure of a display device 1 according to an embodiment of the present application, and please refer to FIG. FIG. 9C .

[0157] like FIG. 10A As shown, the structure of the display device 1 may include a display panel 40 and an optical structure layer 80, wherein the optical structure layer 80 includes a protective layer 81, an anti-glare layer 82, and an anti-reflection layer 83. In the Y direction, the protective layer 81 is disposed on the display panel 40, the anti-glare layer 82 is disposed on the protective layer 81, and the anti-reflection layer 83 is disposed on the anti-glare layer 82. The protective layer 81 may be, for example, a glass cover plate, but is not limited thereto. By properly combining the display panel 40, the protective layer 81, the anti-glare layer 82, and the anti-reflection layer 83, the display device 1 can provide a display effect similar to that of paper, or significantly reduce reflected light and glare.

[0158] In one embodiment, the anti-glare layer 82 and the glass cover (protective layer 81) can form an anti-glare glass, wherein the glossiness of the anti-glare glass can be between 10 and 50 GU (gloss unit), i.e., 10 GU ≤ glossiness of the anti-glare glass ≤ 50 GU, but not limited thereto. In one embodiment, the transmittance of the anti-glare glass can be greater than or equal to 90%, i.e., 90% ≤ glossiness of the anti-glare glass, but not limited thereto.

[0159] In an embodiment, the optical structure layer 80 formed by the glass cover plate (protective layer 81), the anti-glare layer 82, and the anti-reflection layer 83 can have a glossiness between 4 and 35 GU, i.e., 4 GU≦the glossiness of the optical structure layer 80≦35 GU. In an embodiment, the optical structure layer 80 can have a glossiness between 4 and 30 GU, i.e., 4 GU≦the glossiness of the optical structure layer 80≦30 GU. In an embodiment, the optical structure layer 80 can have a glossiness between 4 and 20 GU, i.e., 4 GU≦the glossiness of the optical structure layer 80≦20 GU. The present application is not limited thereto. In addition, in an embodiment, the optical structure layer 80 can have a transmittance between 70 and 95%, i.e., 70%≦the transmittance of the optical structure layer 80≦95%. In addition, in an embodiment, the optical structure layer 80 can have a reflectivity less than or equal to 6%, i.e., 6%≦the reflectivity of the optical structure layer 80. In an embodiment, the optical structure layer 80 can have a reflectivity including a specular component included (SCI) between 3 and 6%, i.e., 3%≦the SCI reflectivity of the optical structure layer 80≦6%. In an embodiment, the optical structure layer 80 can have a reflectivity including a specular component included (SCI) between 4 and 6%, i.e., 4%≦the SCI reflectivity of the optical structure layer 80≦6%. The present application is not limited thereto.

[0160] In an embodiment, the display panel 40 and the optical structure layer 80 can form a display module, which can have a glossiness less than or equal to 10 GU, i.e., 10 GU≧the glossiness of the display module, such as 5 GU. In an embodiment, the display module can have a SCI reflectivity less than or equal to 3%, i.e., 3%≧the SCI reflectivity of the display module. In an embodiment, the display module can have a reflectivity excluding a specular component excluded (SCE) greater than or equal to 0.6 times the SCI reflectivity, i.e., the SCE reflectivity of the display module the SCI reflectivity of the display module. In this way, the display device 100 can reduce the reflected light, and thus can improve the visual quality.

[0161] In an embodiment, the display device 1 can be a foldable or flexible electronic device, and can be of a non-self-emissive or self-emissive type. The display device 1 can include light-emitting units such as organic light-emitting diodes (OLEDs), mini LEDs, micro LEDs, or quantum dot LEDs, but is not limited thereto. The display technology of the display module can be of a liquid crystal display (LCD), an OLED display, a mini LED display, a micro LED display, a cholesteric liquid crystal display (ChlLCD), or an electrophoretic display (EPD) type. Depending on the type of display technology, the display device 1 can or can not be provided with a backlight module 50, and is not limited thereto. In an embodiment, the size of a wafer of light-emitting diodes (LEDs) is about 300 micrometers to 10 millimeters (i.e., 300 µm ≦ size ≦ 10 mm), the size of a wafer of mini LEDs is about 100 micrometers to 300 micrometers (i.e., 100 µm ≦ size ≦ 300 µm), the size of a wafer of micro LEDs is about 1 micrometer to 100 micrometers (i.e., 1 µm ≦ size ≦ 100 µm), and is not limited thereto.

[0162] FIG. 10B is a structural schematic diagram of the display device 1 of another embodiment of the present application, and please refer to FIGS. 1A-10A . FIG. 10B Embodiments are generally applicable FIG. 10A to the description of the embodiments, the following mainly describes the features of the differences.

[0163] As FIG. 10B shown, the protective layer 81 of the optical structure layer 80 can be, for example, a cover film, but is not limited thereto. In an embodiment, the anti-glare layer 82 and the cover film (protective layer 81) can form an anti-glare film, wherein the glossiness of the anti-glare film can be between 10 to 50 GU, i.e., 10 GU ≦ glossiness of the anti-glare film ≦ 50 GU, and is not limited thereto. In an embodiment, the transmittance of the anti-glare film can be greater than or equal to 90 percent (%), i.e., 90% ≦ transmittance of the anti-glare film, and is not limited thereto. In addition, in FIG. 10B the embodiment, the glossiness, transmittance, reflectance, and reflectance including specular reflection light of the optical structure layer 80 can apply to the description of the FIG. 10A embodiments. In addition, the glossiness, SCI reflectance, or SCE reflectance of the display panel 40 and the display module formed with the optical structure layer 80 can also apply to the description of the FIG. 10A embodiments.

[0164] FIG. 10C is a structural schematic diagram of a display device 1 of another embodiment of the present application, and please refer to FIGS. 1A-10B . FIG. 10C Embodiments are generally applicable FIG. 10A to the description of the embodiments, the following mainly describes the features of the differences.

[0165] As FIG. 10C shown, the protective layer 81 of the optical structure layer 80 may, for example, be a polarizer, but is not limited thereto. In an embodiment, the anti-glare layer 82 and the polarizer (protective layer 81) can form an anti-glare polarizer, wherein the glossiness of the anti-glare polarizer can be between 10 to 50 GU, that is, 10 GU ≦ glossiness of the anti-glare polarizer ≦ 50 GU, and is not limited thereto. In an embodiment, the transmittance of the anti-glare polarizer can be greater than or between 45 to 60%, that is, 45% ≦ transmittance of the anti-glare polarizer ≦ 60%, and is not limited thereto. In addition, in FIG. 10C an embodiment, the glossiness, transmittance, reflectance, and reflectance including specular reflection light of the optical structure layer 80 can apply to the description of FIG. 10A the embodiments. In addition, the glossiness, SCI reflectance or SCE reflectance of the display module formed by the display panel 40 and the optical structure layer 80 can also apply to the description of FIG. 10A the embodiments.

[0166] Next, the details of the protective layer 81 and the anti-glare layer 82 are described. FIG. 11A and FIG. 11B are structural schematic diagrams of the protective layer 81 and the anti-glare layer 82 of an embodiment of the present application, and please refer to FIGS. 1A-10C . FIG. 11A and FIG. 11B can be used to describe the details of the protective layer 81 and the anti-glare layer 82 forming an anti-glare glass in the form of a glass cover plate.

[0167] As FIG. 11AIn an embodiment, the anti-glare layer 82 can be formed on the glass cover plate (protection layer 81) by spraying. In an embodiment, the "spraying" is, for example, a process of applying a specific solution for forming the anti-glare layer 82 to a surface of the glass cover plate (protection layer 81) to form protruding structures on the surface, and then curing the specific solution and the glass cover plate (protection layer 81) by high temperature to form an anti-glare glass having the anti-glare layer 82. In an embodiment, the specific solution can be, for example, silicon dioxide (SiO2), but is not limited thereto. In an embodiment, the anti-glare layer 82 formed by spraying can have a plurality of protruding structures, each of which has a width w1 (e.g., a distance between peaks or valleys of each protruding structure) of 5 to 20 micrometers, i.e., 5um≦w1≦20um, but is not limited thereto. In an embodiment, each of the protruding structures has a height h1 in the Y direction of 0.1 to 0.5 micrometers, i.e., 0.1um≦h1≦0.5um, but is not limited thereto. Thus, the anti-glare layer 82 can provide a good anti-glare effect.

[0168] As shown in FIG. 1, FIG. 11B In an embodiment, a surface of the glass cover plate (protection layer 81) can be roughened by etching to have an effect similar to that of the anti-glare layer 82. In an embodiment, the "etching" is, for example, a process of corroding a film layer on a surface of the glass cover plate (protection layer 81) by an acidic substance to form recessed structures on the film layer, thereby forming an anti-glare glass having an effect similar to that of the anti-glare layer 82 (recessed). Thus, it is known that FIG. 11B The structure of the embodiment can have an effect similar to that of the anti-glare layer 82 by etching the protection layer 81, and thus can not necessarily have the actual anti-glare layer 82. In an embodiment, a surface of the protection layer 81 roughened by etching can have a plurality of recessed structures, each of which has a width w2 (e.g., a distance between peaks or valleys of each recessed structure) of 5 to 20 micrometers, i.e., 5um≦w2≦20um, but is not limited thereto. In an embodiment, each of the recessed structures has a depth h2 in the Y direction of 0.1 to 0.5 micrometers, i.e., 0.1um≦h2≦0.5um, but is not limited thereto. Thus, the surface of the protection layer 81 can provide an anti-glare effect similar to that of the anti-glare layer 82.

[0169] FIG. 11C and FIG. 11D are structural diagrams of the protection layer 81 and the anti-glare layer 82 of another embodiment of the present application, respectively, and reference is made to FIGS. 1A-11B . FIG. 11C and FIG. 11D can be used to describe details of the formation of the anti-glare film by the cover film (protection layer 81) and the anti-glare layer 82.

[0170] As shown in FIG. 1, FIG. 11CAs shown, in one embodiment, the cover film (protective layer 81) may include a hard coating layer 811. The anti-glare layer 82 may be formed by mixing a specific particulate material 812 into the hard coating layer 811 to create a raised and recessed structure. In one embodiment, after the raised and recessed structures are created, the hard coating layer 811 may have a maximum thickness h3. This maximum thickness h3 may be between 1 and 3 microns, i.e., 1 μm ≤ h3 ≤ 3 μm, but is not limited to this. In one embodiment, the specific particulate material 812 may include, for example, silica particles, but is not limited to this.

[0171] like FIG. 11D As shown, in one embodiment, the cover film (protective layer 81) may include a hard coating layer 811. The anti-glare layer 82 may be formed by applying nanoimprinting technology to the hard coating layer 811 to create a recessed structure in the hard coating layer 811. In one embodiment, the hard coating layer 811 may have a maximum thickness h4 after the recessed structure is created. The maximum thickness h4 may be between 1 and 3 microns, i.e., 1 μm ≤ h4 ≤ 3 μm, but is not limited thereto.

[0172] Next, the details of the anti-reflection layer 83 will be described. FIGS. 10A-10C . In one embodiment, the anti-reflection layer 83 may be formed by coating a plurality of film layers with different refractive indices on the surface of the anti-glare layer 82 using physical vapor deposition (PVD) technology. In one embodiment, the anti-reflection layer 83 may include a plurality of high refractive index sublayers and a plurality of low refractive index sublayers, wherein the high refractive index sublayers and the low refractive index sublayers may be stacked alternately, and are not limited thereto. The high refractive index sublayer or the low refractive index sublayer may include a metal oxide or a dielectric material, and are not limited thereto. In one embodiment, the outermost sublayer of the anti-reflection layer 83 in the display direction is a low refractive index sublayer, and are not limited thereto. In one embodiment, the total number of high refractive index sublayers and low refractive index sublayers is at least four layers, and are not limited thereto. In one embodiment, the refractive index of the high refractive index sublayer is higher than that of the low refractive index sublayer. For example, the refractive index value of the high refractive index sublayer may be between 1.9 and 2.4, that is, 1.9≦the refractive index value of the high refractive index sublayer≦2.4; the refractive index value of the low refractive index sublayer may be between 1.2 and 1.5, that is, 1.2≦the refractive index value of the low refractive index sublayer≦1.5, and is not limited thereto.

[0173] In an embodiment, the anti-reflective layer 83 can be a non-smoke anti-reflective layer. In an embodiment, the material of the high refractive index sub-layer of the non-smoke anti-reflective layer can include niobium pentoxide (Nb2O5), and is not limited thereto, and the material of the low refractive index sub-layer of the non-smoke anti-reflective layer can include silicon dioxide (SiO2), and is not limited thereto. In an embodiment, the sub-layer configuration of the anti-reflective layer 33 in the non-smoke anti-reflective layer form can be shown in Table 1. It should be noted that the parameters and the number of sub-layers in Table 1 are only examples.

[0174] Table 1:

[0175]

[0176] In another embodiment, the anti-reflective layer 83 can be a smoke anti-reflective layer. In an embodiment, the material of the high refractive index sub-layer of the smoke anti-reflective layer can include indium tin oxide (ITO), and is not limited thereto. In an embodiment, the material of the low refractive index sub-layer of the smoke anti-reflective layer can include silicon dioxide, and is not limited thereto. In an embodiment, the high refractive index sub-layer of the smoke anti-reflective layer has an extinction coefficient k, wherein the extinction coefficient k can be between 0.01 and 0.05, i.e. 0.01≦k≦0.05, and is not limited thereto; in addition, the low refractive index sub-layer can substantially not have light absorption characteristics. In an embodiment, the configuration of the sub-layers of the anti-reflective layer 83 (smoke anti-reflective layer) can be shown in Table 2. It should be noted that the parameters and the number of sub-layers in Table 2 are only examples.

[0177] Table 2:

[0178]

[0179] In addition, in an embodiment, the reflectivity of the anti-reflective layer 83 can be between 3 and 6 percent, i.e. 3%≦reflectivity of the anti-reflective layer 83≦6%, and is not limited thereto. In an embodiment, the overall thickness of the anti-reflective layer 83 in the Y direction can be between 200 and 700 nanometers, i.e. 200nm≦overall thickness of the anti-reflective layer 83≦700nm, and is not limited thereto.

[0180] Next, the details of the backlight unit 50 or the self-luminous display module (self-luminous display panel 40 and optical structure layer 80) of the present application will be described.

[0181] In an embodiment, the backlight unit 50 can include a plurality of diffusion sheets and a light guide plate, wherein in the Y direction, the diffusion sheets can be disposed on the light guide plate, and the like. In an embodiment, the number of diffusion sheets of the backlight unit 50 is at least two, and the like. In an embodiment, no other optical film layer is disposed between the upper diffusion sheet and the lower diffusion sheet. In an embodiment, in the Y direction, a brightness enhancement film can be disposed above the diffusion sheets, which can be, for example, a dual brightness enhancement film (DBEF), but is not limited thereto.

[0182] In an embodiment, the full width at half maximum (FWHM) of the luminance of the backlight unit 50 or the display module of the self-emitting type corresponding to the viewing angle can be greater than 40 degrees, i.e., 40°≦FWHM, for example, 45 degrees, and the like. Here, the "full width at half maximum" refers to the difference in angle between the viewing angle having half the luminance of the maximum luminance and the zero-degree viewing angle.

[0183] Therefore, the detailed features of the structure of the display device 1 of the present application can be understood. It should be noted that the numerical values or dimensions, the profiles of the layers, the structures of the transistors, the configurations of the circuits, and the like mentioned in the above description are only examples, and the present application is not limited thereto.

[0184] In an embodiment, the present application can be judged whether it falls within the scope of protection of the present application at least by whether the elements of the product in dispute exist, the element configuration, the mechanism observation, and / or the operation mode, and the like, and is not limited thereto.

[0185] The details or features among the embodiments of the present application can be arbitrarily mixed and used as long as they do not conflict with each other or deviate from the spirit of the present application.

[0186] The above-described embodiments are only examples for convenience of explanation, and the scope of the right claimed by the present application should be described by the patent claim, and is not limited to the above-described embodiments.

Claims

1. A display device, characterized by comprising: The display device includes: a color temperature sensor for sensing a color temperature of ambient light and outputting a target white point information; an operation unit coupled to the color temperature sensor for calculating three adjustment factors corresponding to red, green and blue according to the target white point information; a gamma unit coupled to the operation unit for receiving the three adjustment factors and adjusting gamma curves corresponding to red, green and blue; and a display panel including a red sub-pixel, a green sub-pixel and a blue sub-pixel, wherein the display panel is coupled to the gamma unit and receives an image signal, and the display panel provides corresponding data signals to the red sub-pixel, the green sub-pixel and the blue sub-pixel according to the gamma curves corresponding to red, green and blue.

2. The display device according to claim 1, wherein The display device further includes a backlight unit, wherein the operation unit calculates a brightness adjustment factor according to the target white point information, and the backlight unit receives the brightness adjustment factor and adjusts a backlight brightness provided to the display panel.

3. The display device according to claim 1, wherein The display device displays an image corresponding to an original content, and the operation unit further includes a color gamut conversion module including a target color gamut of the original content under ambient light, wherein the color gamut conversion module is coupled to the color temperature sensor, the operation unit receives an original image signal, and the original image signal is converted into the image signal according to the target color gamut.

4. The display device according to claim 3, wherein The original content includes a photo, a painting or a picture.

5. The display device according to claim 1, wherein The operation unit calculates a brightness adjustment factor according to the target white point information, and the display panel receives the brightness adjustment factor and adjusts brightness of the red sub-pixel, the green sub-pixel and the blue sub-pixel.

6. The display device according to claim 5, wherein Each of the red sub-pixel, the green sub-pixel and the blue sub-pixel includes a driving transistor, an emitting transistor and a light emitting unit, the emitting transistor is coupled between the driving transistor and the light emitting unit, and the emitting transistor receives the brightness adjustment factor.

7. The display device according to claim 1, wherein The display device further includes an optical structure layer, wherein the optical structure layer includes a protective layer, an anti-glare layer and an anti-reflection layer, the protective layer is disposed on the display panel, the anti-glare layer is disposed on the protective layer, and the anti-reflection layer is disposed on the anti-glare layer.

8. The display device according to claim 7, wherein The optical structure layer has a glossiness between 4 and 35 GU.

9. The display device according to claim 7, wherein The optical structure layer has a transmittance between 70 and 95%.

10. The display device according to claim 7, wherein The anti-glare layer and the protective layer form an anti-glare glass, and the anti-glare glass has a glossiness between 10 and 50 GU.

Images