Display device

Abstract

The invention discloses a display device which comprises a substrate, a liquid crystal layer and a heating unit, the liquid crystal layer is arranged on the substrate, the heating unit is arranged on the substrate and comprises a first heater and a second heater, and the second heater is arranged around the first heater. The resistance value of the second heater is smaller than that of the first heater.

Description

Technical Field

[0001] The invention relates to a display device. Background Art

[0002] The display quality of the display device is easily affected by the ambient temperature. When the ambient temperature is too low, the display quality will be reduced. The main technology nowadays is to use an external heater to enable the display device to maintain an appropriate temperature. However, the external heater has problems such as increasing the thickness of the display device and poor heating efficiency. Therefore, how to enable the display device to maintain an appropriate temperature has become increasingly important. Summary of the invention

[0003] The invention provides a display device with good heating efficiency.

[0004] The display device of the present invention includes a substrate, a liquid crystal layer and a heating unit. The liquid crystal layer is arranged on the substrate. The heating unit is arranged on the substrate. The heating unit includes a first heater and a second heater. The second heater is arranged around the first heater and is coupled to the first heater. The resistance value of the second heater is smaller than the resistance value of the first heater.

[0005] Based on the above, the second heater of the heating unit is arranged around the first heater and coupled to the first heater, and the resistance value of the second heater is smaller than the resistance value of the first heater. In this way, the display device can achieve optimal heating efficiency and temperature uniformity and improve display quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1A FIG. 4 is a top view of a display device according to an embodiment of the present disclosure.

[0007] Figure 1B for Figure 1A A partial enlarged schematic diagram of area AA'.

[0008] Figure 1C for Figure 1B Schematic diagram of the cross section along I-I'.

[0009] Figures 1D to 1H FIG. 4 is a diagram showing a configuration of a heating unit according to an embodiment of the present disclosure.

[0010] Fig. 1I is a schematic diagram of a heating unit according to an embodiment of the present disclosure.

[0011] Figure 2 FIG. 4 is a top view of a display device according to another embodiment of the present disclosure.

[0012] Figure 3A FIG. 4 is a top view of a display device according to another embodiment of the present disclosure.

[0013] Figure 3B for Figure 3A A partial enlarged schematic diagram of area BB'.

[0014] Figure 3C for Figure 3B Schematic diagram of the cross section along I-I'.

[0015] Figure 4 FIG. 4 is a top view of a display device according to another embodiment of the present disclosure.

[0016] Figure 5 FIG. 4 is a top view of a display device according to another embodiment of the present disclosure.

[0017] Wherein, the reference numerals are:

[0018] 100A, 100B, 100C, 100D, 100E: display device

[0019] 110:Substrate

[0020] 120: buffer layer

[0021] 130, 160, 170, 180: Insulation layer

[0022] 140: Flat layer

[0023] 150: Heating unit

[0024] 150a: first heater

[0025] 150b: Second heater

[0026] 150c: The third heater

[0027] 150a1: First end

[0028] 150a2: Second end

[0029] 150b1: Part 1

[0030] 150b2: Part 2

[0031] 150a-1: Group 1

[0032] 150a-2: Group 2

[0033] 150a-3: Group 3

[0034] 150a-4: Group 4

[0035] 150b1-1, 150b1-2, 150b2-1, 150b2-2: Part

[0036] 190: Glass substrate

[0037] A: Area

[0038] AL: Active Layer

[0039] BM: Black Matrix

[0040] CU: Control unit

[0041] D1: First direction

[0042] D2: Second direction

[0043] D3: Third direction

[0044] DL: Data line

[0045] E1, E2: Electrode

[0046] GL: Gate Line

[0047] LC: Liquid Crystal Layer

[0048] L: Length

[0049] OC: Optical adhesive layer

[0050] PB: Driver circuit board

[0051] R, G, B: color filter layer

[0052] SL:Signal Line

[0053] SM:Light-shielding metal

[0054] ST: Sensing trace

[0055] TS: Temperature sensor

[0056] W1, W2: Width DETAILED DESCRIPTION

[0057] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0058] Figure 1A FIG. 4 is a top view of a display device according to an embodiment of the present disclosure.

[0059] The display device 100A includes a substrate 110, a liquid crystal layer LC and a heating unit 150. The liquid crystal layer LC is disposed on the substrate 110. The heating unit 150 is disposed on the substrate 110 and includes a first heater 150a and a second heater 150b. The second heater 150b includes a first portion 150b1 and a second portion 150b2. The second heater 150b is disposed around the first heater 150a and coupled to the first heater 150a, and the resistance value of the second heater 150b is less than the resistance value of the first heater 150a.

[0060] The display device 100A may also include a control element CU and a driving circuit board PB. The control element CU is disposed on the driving circuit board PB and is electrically connected to the third heater 150c, and the resistance value of the third heater 150c is less than the resistance value of the second heater 150b. The driving circuit board PB further includes a temperature sensing control circuit, which is connected between the control element CU and the driving circuit board PB and the temperature sensing control circuit is electrically communicated with the sensing trace ST through the driving circuit board PB. Specifically, the current signal generated by the temperature sensor TS corresponding to the temperature of the area in which it is located can be transmitted to the temperature sensing control circuit through the sensing trace ST and the driving circuit board PB.

[0061] The temperature sensors TS generate different current signals due to the temperature differences in their respective areas. These current signals can be transmitted to the temperature sensing control circuit on the driver circuit board PB through the sensing traces ST corresponding to the temperature sensors TS, and the temperature sensing control circuit sequentially obtains the current signals generated by different temperature sensors TS, further converts them into digital signals and provides them to the calculation system for analysis.

[0062] In this embodiment, the driving circuit board PB includes a driving chip, which is, for example, a system on chip (SOC). The driving chip can be used to analyze the digital signal provided by the temperature sensing control circuit and dynamically adjust the driving signal of the area where each temperature sensor TS is located according to the analysis result, so as to achieve optimal heating efficiency and temperature uniformity, which helps to improve display quality.

[0063] Please refer to Figure 1A, the first heater 150a includes a first end 150a1 and a second end 150a2, the second heater 150b includes a first portion 150b1 and a second portion 150b2, the first heater 150a extends along the second direction D2, the first end 150a1 of the first heater 150a is coupled to the first portion 150b1 of the second heater 150b, and the second end 150a2 of the first heater 150a is coupled to the second portion 150b2 of the second heater 150b. In some embodiments, the width of the second heater 150b along the second direction D2 is greater than or equal to the width of the first heater 150a along the first direction D1, and the thickness of the second heater 150b along the third direction D3 is greater than or equal to the thickness of the first heater 150a along the third direction D3. The heater in the heating unit 150 may be, for example, composed of a combination of metals such as a single layer / multilayer / metal compound, and the metal may be, for example, aluminum, molybdenum, copper, silver, alloy, or other suitable metal materials with good electrical conductivity.

[0064] In the present embodiment, the first heater 150a may include a plurality of first heaters 150a, at least a portion of the plurality of first heaters 150a overlaps with the liquid crystal layer LC in the normal direction of the substrate 110, and at least another portion of the plurality of first heaters 150a does not overlap with the liquid crystal layer LC in the normal direction of the substrate 110. The number of the plurality of first heaters 150a overlapping with the liquid crystal layer LC is greater than the number of the plurality of first heaters 150a not overlapping with the liquid crystal layer LC. Thus, the first heaters 150a can achieve optimal heating efficiency and temperature uniformity of the display device through the above-mentioned design, which helps to improve the display quality.

[0065] Figure 1B for Figure 1A A partial enlarged schematic diagram of area AA'.

[0066] The display device 100A may include a plurality of circuits, the circuits extending along the first direction D1 may include the gate lines GL, and the circuits extending along the second direction D2 may include the signal lines SL and the first heater 150a arranged in parallel with the signal lines SL, and the light shielding metal SM is arranged along the extending direction of the gate lines GL and overlaps the signal lines SL. The first direction D1 is different from the second direction D2. In some embodiments, the first direction D1 and the second direction D2 may be perpendicular to each other, but not limited thereto. The electrode E1 is a common electrode, and a plurality of electrodes E2 arranged adjacent to each other in sequence are pixel electrodes. The material of the electrode E1 and the electrode E2 may include a transparent conductive material or an opaque conductive material. The transparent conductive material may include, for example, indium tin oxide, indium zinc oxide or other suitable transparent conductive materials, but not limited thereto. The opaque conductive material may include, for example, aluminum, molybdenum, copper, silver, alloy or other suitable opaque conductive materials, but not limited thereto.

[0067] Figure 1C for Figure 1B Schematic diagram of the cross section along I-I'.

[0068] The substrate 110 is covered with a buffer layer 120, and the material of the buffer layer 120 includes a silicon semiconductor, such as crystalline silicon, polycrystalline silicon, microcrystalline silicon, amorphous silicon, etc. The insulating layer 130, the insulating layer 140, the insulating layer 160, the insulating layer 170 and the insulating layer 180 are sequentially arranged on the buffer layer 120, and the material of the insulating layer may include an organic insulating material, an inorganic insulating material, or a stack of multiple insulating materials. Inorganic insulating materials include silicon oxide, nitride system, silicon oxynitride, other oxide insulating materials, other nitride insulating materials or other oxynitride insulating materials. Organic insulating materials include flat layer materials, resin materials, or other similar materials. The insulating layer may be a transparent film layer in some embodiments, therefore. The insulating layer allows light, such as visible light, to penetrate. The insulating layer 140 can provide a flattened surface for the micro signal line SL and the data line DL to be arranged thereon, but is not limited thereto. The electrode E1 is formed on the insulating layer 170 and is located between the first heater 150a and the liquid crystal layer LC. The first heater 150a is driven by a voltage to generate a current thermal effect to heat the liquid crystal layer LC. Since the first heater 150a is close to the liquid crystal layer LC, the heating efficiency is high. In addition, since the first heater 150a is located on the insulating layer 160 and covered by the insulating layer 170, such a configuration does not require additional thickness increase of the display device 100A. In some embodiments, the heating unit 150 can be disposed on a surface of the substrate 110 close to the liquid crystal layer LC (not shown) to increase the temperature of the liquid crystal layer LC to within the operating temperature range; in some embodiments, the heating unit 150 can be disposed on a surface of the substrate 110 far from the liquid crystal layer LC (not shown) to increase the temperature of the liquid crystal layer LC to within the operating temperature range, but the present invention is not limited thereto.

[0069] In detail, the liquid crystal molecules in the liquid crystal layer LC can exhibit better characteristics, such as optical characteristics, electromagnetic wave modulation characteristics, etc., in an environment within a temperature range to achieve the function of the display device 100A, and this temperature range can be regarded as the operating temperature range of the liquid crystal layer LC. In some embodiments, the operating temperature range of the liquid crystal layer LC can be, for example, between 10 degrees Celsius and 70 degrees Celsius, for example, it can be room temperature. If the ambient temperature of the display device 100A is lower than the operating temperature range of the liquid crystal layer LC, the display device 100A may reduce the operating quality of the display device 100A because the liquid crystal layer LC cannot exhibit the expected characteristics. In some embodiments, the display device 100A installed outdoors or installed on a car may not work properly when the ambient temperature is lower than the operating temperature range of the liquid crystal layer LC. By setting the heating unit 150 in the display device 100A, the temperature of the liquid crystal layer LC can be heated to within the operating temperature range, so that the display device 100A can be operated in a low temperature environment (lower than the operating temperature range of the liquid crystal layer LC) and is less affected by the ambient temperature.

[0070] The display device 100A may also include a plurality of electrodes E2 arranged along the first direction D1 and a color filter layer, a transparent adhesive layer OC and a glass substrate 190 arranged corresponding to the electrodes E2. The transparent adhesive layer OC is arranged between the color filter layer and the liquid crystal layer LC. The color filter layer provides a color filtering effect so that the display device 100A can display a colorful picture, such as a blue color filter layer B, a red color filter layer R or a green color filter layer G. The arrangement order or combination of the color filter layers can be carried out according to actual needs. In this embodiment, the blue color filter layer B, the red color filter layer R and the green color filter layer G are arranged adjacent to each other along the first direction D1. The display device 100A also includes a black matrix BM located between the color filter layer B, the color filter layer R and the color filter layer G. The black matrix BM can be arranged on the glass substrate 190. In addition, the black matrix BM disposed between two adjacent color filter layers B, R and G can prevent the colors of the color filter layers B, R and G from mixing with each other, which helps to improve the display contrast and display color of the display device 100A.

[0071] In the present embodiment, the first heater 150a in the display device 100A has a width W1 along the first direction D1, and the width W2 between two adjacent black matrices BM along the first direction D1, and the width W2 can be understood as the width of a display pixel, for example, the width of a color filter layer R displaying red and a black matrix BM along the first direction D1. The width W2 is greater than the width W1 of the first heater 150a. In some embodiments, when the display device is at a pixel density (Pixels Per Inch, PPI) of 150 to 220, the range of the width W2 is, for example, greater than or equal to 38.4 microns and less than or equal to 56.6 microns, but is not limited thereto. In some embodiments, the ratio range of the width W1 to the width W2 is, for example, less than or equal to 0.2604 and greater than or equal to 0.053, but is not limited thereto.

[0072] Figure 1D This is a diagram of the heating unit configuration according to an embodiment of the present disclosure. Figure 1C and Figure 1D The first heater 150a in the heating unit 150 has a width W1 along the first direction D1, and the value of W1 is, for example, 3 to 10 microns. In this embodiment, the value of W1 is, for example, 3 microns, and the first heater 150a has a length L along the second direction D2, and the length L is, for example, 153.75 microns (μm). Therefore, the area of ​​one first heater 150a is, for example, 3*153.75μm. 2 The display pixel has a width W2 along the first direction D1. In this embodiment, taking the value of W2 as 51.25 μm as an example, the display pixel has a length L along the second direction D2. The length L is, for example, 153.75 micrometers (μm). The area A of a display pixel is, for example, 51.25*153.75 μm. 2 When the display device 100A includes four first heaters 150a and three display pixels, the area ratio of the first heater 150a to the display pixels in the XY plane is, for example, 7.8%. Figure 1E When the display device 100A includes two first heaters 150a and three display pixels, the area ratio of the first heater 150a to the display pixels in the XY plane is, for example, 3.9%. Figure 1F When the display device 100A includes one first heater 150a and three display pixels, the area ratio of the first heater 150a to the display pixels in the XY plane (i.e., the plane of the substrate 110) is, for example, 1.95%. In some embodiments, the area ratio of the first heater 150a to the display pixels in the XY plane is, for example, greater than or equal to 1.5% or less than or equal to 10.5%, and a preferred value is, for example, 8%.

[0073] Figure 1GAccording to a heating unit configuration diagram of an embodiment of the present disclosure, Figure 1G and Figure 1D The difference is that the first heater 150a in the heating unit 150 extends along the first direction D1. The first heater 150a in the heating unit 150 has a width W1 along the second direction D2. In this embodiment, the value of W1 is 3 microns, and the length of the first heater 150a along the second direction D2 is, for example, 153.75 microns (μm). Therefore, the area of ​​one first heater 150a is, for example, 3*153.75μm. 2 The display pixel has a width W2 along the first direction D1, and the value of W2 is, for example, 51.25 μm. The display pixel has a length L along the second direction D2, and the length L is, for example, 153.75 micrometers (μm). The area A of a display pixel is, for example, 51.25*153.75 μm. 2 When the display device includes two first heaters 150a and three display pixels, the area ratio of the first heater 150a to the display pixels in the XY plane is, for example, 3.9%. Figure 1H When the display device includes one first heater 150a and three display pixels, the area ratio of the first heater 150a to the display pixels in the XY plane is, for example, 1.95%. In some embodiments, the area ratio of the first heater 150a to the display pixels in the XY plane is, for example, greater than or equal to 1.5% or less than or equal to 10.5%, and a preferred value is, for example, 4%.

[0074] Fig. 1I is a schematic diagram of a heating unit according to an embodiment of the present disclosure.

[0075] Please also refer to Figure 1A and Figure 1D The control element CU includes a first control unit C1 and a second control unit C2. The first control unit C1 and the second control unit C2 are respectively connected to the third heater 150c set relative to the control unit CU. The control unit CU provides current to the heating unit 150. Since the resistance value of the third heater 150c is smaller than the resistance value of the second heater 150b and the resistance value of the second heater 150b is smaller than the resistance value of the first heater 150a.

[0076] Specifically, the heater has a resistance value (R), so when current (I) flows through the heater, heat energy (P) will be generated. According to the definition of power and Ohm's law, the heat energy (P) generated by the heater can meet the following formula: P = V 2 / R=I 2R, where P is in watt (W), V is in volt (V), and I is in ampere (A). The display device 100A can adjust the resistance value of the heater, the voltage value of the first control unit C1, and the voltage value of the second control unit C2 according to the above formula and the required heating effect. In some embodiments, the heater can be a conductive component with impedance, such as a heating wire, a heating sheet, a heating plate, etc., but the present disclosure is not limited thereto.

[0077] In the present embodiment, the control element CU coupled to the heater is, for example, a switch element. Here, the switch element may be, for example, a transistor element, but is not limited thereto. The control element CU includes a first control unit C1 or a second control unit C2 disposed on the side of the substrate 110 and coupled to the heater. The second control unit C2 includes a first end C2a and a second end C2b, and the first control unit C1 may also include a third end C1a and a fourth end C1b. The first end C2a of the second control unit C2 may receive a control signal, and the second end C2b is coupled to the third end C1a of the first control unit C1, and the heater is coupled to the fourth end C1b of the first control unit C1. In some embodiments, when the heating unit 150 needs to heat the liquid crystal layer LC, the control signal is set to a signal to turn on the control element CU. Therefore, the current generated by the voltage difference between the second control unit C2 and the first control unit C1 will be input into the first control unit C1 through the second control unit C2, and then output from the first control unit C1, so that the heater emits heat to heat the liquid crystal layer LC to the operating temperature range. When the heating unit 150 does not need to provide a heating function, the control signal is set to a signal to turn off the switch element, thereby preventing current from passing through the heater and preventing it from generating heat. Such a design ensures energy-saving control of the heater and guarantees the service life of the heater, thereby improving the reliability and stability of the product.

[0078] In some embodiments, the control signal can be adjusted according to different parameters so that the heating unit 150 performs the heating function in response to different conditions. For example, the display device 100A can be operated in conjunction with a temperature sensor TS. The temperature sensor TS, such as an infrared sensor or other similar device, can sense the temperature of the display device 100A. When the result sensed by the temperature sensor TS shows that the temperature of the display device 100A is lower than the operating temperature range of the liquid crystal layer LC (for example, 10 degrees Celsius), the temperature sensor TS can provide this result to the temperature sensing control circuit, so that the temperature sensing control circuit outputs a control signal to the control element CU, so that the heating unit 150 heats the liquid crystal layer LC to the operating temperature range. In some embodiments, if the result sensed by the temperature sensor TS indicates that the temperature of the display device 100A is close to or has reached the maximum value of the operating temperature range of the liquid crystal layer LC (for example, 70 degrees Celsius), the temperature sensor TS can provide this result to the temperature sensing control circuit, so that the temperature sensing control circuit outputs a control signal to the control element CU to stop the heating unit 150 from continuously heating the liquid crystal layer LC. That is, the display device 100A can achieve a time-zoned heating effect by adjusting the control signal to control the heating unit 150 to heat or stop heating in a specified time segment. However, the present disclosure is not limited to this. In some embodiments, the display device 100 can be operated together with a thermostat (not shown) to heat the liquid crystal layer LC to a preset temperature range within the operating temperature range.

[0079] Figure 2 is a top view schematic diagram of a display device according to another embodiment of the present disclosure. Figure 1A and Figure 2 The display device 100B of this embodiment and Figure 1A Similar to the display device 100A, Figure 2 and Figure 1AThe difference is that each of the plurality of first heaters 150a has a first end 150a1 and a second end 150a2, the second heater 150b includes a first portion 150b1 and a second portion 150b2, at least a portion of the first ends 150a1 of the plurality of first heaters 150a are connected to each other, at least a portion of the second ends 150a2 of the plurality of first heaters 150a are connected to each other, at least another portion of the first ends 150a1 of the plurality of first heaters 150a are coupled to the first portion 150b1 of the second heater 150b, and at least another portion of the second ends 150a2 of the plurality of first heaters 150a are coupled to the second portion 150b2 of the second heater 150b. Therefore, in order to optimize the resistance of the heater, According to the design, the first heater 150a can pass through the liquid crystal layer LC once, three times, or multiple times, but it is not limited thereto. Here, the term "single pass" means that the first heater 150a extends from the first portion 150b1 of the second heater 150b toward the second portion 150b2 along the second direction D2, and the term "three passes" means that the first heater 150a extends from the first portion 150b1 of the second heater 150b toward the second portion 150b2 along the second direction D2 without contacting the second portion 150b2, then returns toward the first portion 150b1 of the second heater 150b without contacting the second portion 150b2, and then returns toward the second portion 150b2 of the second heater 150b and couples with the second portion 150b2. The first heater 150a can achieve the optimal heating efficiency and temperature uniformity of the display device through the above-mentioned design, thereby improving the display quality.

[0080] In some embodiments, the location of the heating unit 150 may be determined based on the characteristics of the display device 100A, the application environment, and other conditions. For example, a plurality of first heaters 150a may be evenly arranged in the display device 100A at equal intervals. Alternatively, the first heaters 150a may be more densely distributed in one area of ​​the display device 100A and more sparsely distributed in another area, but the present invention is not limited thereto.

[0081] Figure 3A FIG. 4 is a top view of a display device according to another embodiment of the present disclosure.

[0082] It should be noted that the following embodiments use the component numbers and some contents of the previous embodiments, wherein similar numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can refer to the previous embodiments, and the following embodiments will not be repeated.

[0083] Please also refer to Figure 1A and Figure 3A The display device 100C of this embodiment and Figure 1A Similar to the display device 100A, Figure 3Aand Figure 1A The difference is that the first heater includes a plurality of first heaters 150a, the plurality of first heaters 150a completely overlap with the liquid crystal layer LC in the normal direction of the substrate 110, and the plurality of first heaters 150a extend along the first direction D1, the first end 150a1 of the first heater 150a is coupled to the first portion 150b1 of the second heater 150b, and the second end 150a2 of the first heater 150a is coupled to the second portion 150b2 of the second heater 150b. The first heater 150a can achieve optimal heating efficiency and temperature uniformity of the display device through the above design, which helps to improve the display quality.

[0084] Figure 3B for Figure 3A A partial enlarged schematic diagram of area BB'.

[0085] Please also refer to Figure 1B and Figure 3B The display device 100C of this embodiment and Figure 1B Similar to the display device 100A, Figure 3B and Figure 1B The difference is that the display device 100C may include a plurality of lines, and the lines extending along the first direction D1 may include the gate line GL and the first heater 150a disposed in parallel with the gate line GL.

[0086] Figure 3C for Figure 3B Schematic diagram of the cross section along I-I'.

[0087] Please also refer to Figure 1C and Figure 3C The display device 100C of this embodiment and Figure 1B Similar to the display device 100A, Figure 3C and Figure 1C The difference is that the first heater 150a in the display device 100C partially overlaps with the electrode E1, the electrode E1 completely overlaps with the gate line GL, the active layer Al and the shading metal SM in the normal direction of the substrate 110, and the first heater 150a does not overlap with the gate line GL in the normal direction of the substrate 110. Since the first heater 150a does not overlap with the gate line GL, it can avoid affecting the signal of the gate line GL.

[0088] Figure 4 FIG. 4 is a top view of a display device according to another embodiment of the present disclosure.

[0089] Please also refer to Figure 4 and Figure 3A The display device 100D of this embodiment is Figure 3A Similar to the display device 100C, Figure 4 and Figure 3AThe difference is that the first part 150b1 of the second heater 150b in the display device 100D can be further divided into two parts arranged in an interlaced manner according to the temperature control requirements, one part 150b1-1 has two widths along the first direction D1, and the two widths are different, the width away from the driving circuit board PB is greater than the width close to the driving circuit board PB, and the other part 150b1-2 has one width along the first direction D1, the first end 150a1 of at least a part of the plurality of first heaters 150a is coupled to the part 150b1-1 of the second heater 150b and the first end 150a1 of at least a part of the plurality of first heaters 150a is coupled to the part 150b1-2 of the second heater 150b, and the second end 150a2 of the first heater 150a and the second part 150b2 of the second heater 150b are connected to the first end 150a1 in the same manner, which will not be repeated here. The first heater 150a can achieve the optimal heating efficiency and temperature uniformity of the display device through the above design, which helps to improve the display quality.

[0090] Figure 5 FIG. 4 is a top view of a display device according to another embodiment of the present disclosure.

[0091] Please also refer to Figure 5 and Figure 3A The display device 100E of this embodiment and Figure 3A Similar to the display device 100C, Figure 5 and Figure 3A The difference is that the plurality of first heaters 150a in the display device 100E can be divided into a plurality of groups, such as a first group 150a-1, a second group 150a-2, a third group 150a-3, and a fourth group 150a-4. In order to optimize the resistance design of the first heater 150a, each group can include four first heaters 150a, and the first ends 150a1 of each of the four first heaters 150a are coupled to each other and are coupled to the first portion 150b1 of the second heater 150b to form a parallel connection. In addition, each group can include four first heaters 150a, and the second ends 150a2 of each of the four first heaters 150a are coupled to each other and are coupled to the second portion 150b2 of the second heater 150b. In some embodiments, each group of first heaters 150a-1 may include, for example, 6, 8, 10 or 2N (N is a positive integer) first ends 150a1 of first heaters 150a-1 coupled to each other and simultaneously coupled to the first part 150b1 of the second heater 150b, but is not limited thereto.

[0092] In summary, the second heater of the heating unit of the present invention is disposed around the first heater and coupled to the first heater, and the resistance value of the second heater is smaller than the resistance value of the first heater. In this way, the display device can achieve optimal heating efficiency and temperature uniformity, thereby improving display quality.

[0093] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A display device, characterized in that: include: a substrate; a liquid crystal layer disposed on the substrate; as well as a heating unit, disposed on the substrate, The heating unit includes a first heater and a second heater. The second heater is disposed around the first heater and coupled to the first heater. The resistance value of the second heater is smaller than the resistance value of the first heater.

2. The display device according to claim 1, wherein: The heating unit further includes a third heater disposed between the substrate and the second heater. The third heater is coupled to the second heater and a resistance value of the third heater is smaller than a resistance value of the second heater.

3. The display device according to claim 1, wherein: The device further comprises a control element, wherein the control element is electrically connected to the third heater.

4. The display device according to claim 1, wherein: The first heater includes a first end and a second end, the second heater includes a first part and a second part, the first end of the first heater is coupled to the first part of the second heater and the second end of the first heater is coupled to the second part of the second heater.

5. The display device according to claim 1, wherein: It also includes a plurality of black matrices arranged on the substrate, wherein the first heater has a first width along the first direction, and any two of the plurality of black matrices have a second width along the first direction, the second width is greater than the first width, and the ratio of the first width to the second width is less than or equal to 0.2604 and greater than or equal to 0.0532.

6. The display device according to claim 1, wherein: It also includes multiple black matrices, multiple color filter layers and multiple first heaters, wherein the multiple black matrices and the multiple color filter layers are arranged on the substrate and staggered along a first direction, wherein the ratio of the sum of the projected areas of the multiple black matrices and the multiple color filter layers on the substrate to the sum of the projected areas of the multiple first heaters on the substrate is greater than or equal to 1.5% or less than or equal to 10.5%.

7. The display device according to claim 1, wherein: It also includes multiple black matrices, multiple color filter layers and multiple first heaters, wherein the multiple black matrices and the multiple color filter layers are arranged on the substrate and staggered along a first direction, wherein the ratio of the sum of the projected areas of the multiple black matrices and the multiple color filter layers on the substrate to the sum of the projected areas of the multiple first heaters on the substrate is 8%.

8. The display device according to claim 1, wherein: It also includes multiple black matrices, multiple color filter layers and multiple first heaters, wherein the multiple black matrices and the multiple color filter layers are arranged on the substrate and staggered along a first direction, wherein the ratio of the sum of the projected areas of the multiple black matrices and the multiple color filter layers on the substrate to the sum of the projected areas of the multiple first heaters on the substrate is 4%.

9. The display device according to claim 1, wherein: The first heater has a first width along a second direction, the substrate has a second width along the second direction, and the second width is greater than the first width.

10. The display device according to claim 1, wherein: The first heater includes a plurality of first heaters, at least a portion of the plurality of first heaters overlaps with the liquid crystal layer in the normal direction of the substrate, and at least another portion of the plurality of first heaters does not overlap with the liquid crystal layer in the normal direction of the substrate.

11. The display device according to claim 9, wherein: The number of the first heaters overlapping the liquid crystal layer is greater than the number of the first heaters not overlapping the liquid crystal layer.

12. The display device according to claim 9, wherein: Each of the multiple first heaters has a first end and a second end, the second heater includes a first part and a second part, the first ends of at least a portion of the multiple first heaters are connected to each other, the second ends of at least a portion of the multiple first heaters are connected to each other, the first ends of at least another portion of the multiple first heaters are coupled to the first part of the second heater, and the second ends of at least another portion of the multiple first heaters are coupled to the second part of the second heater.

13. The display device according to claim 1, wherein: The first heater includes a plurality of first heaters, and the plurality of first heaters completely overlap with the liquid crystal layer in a normal direction of the substrate.

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