TW200527041A - Liquid crystal display panel, heater, and the manufacturing method thereof - Google Patents

Abstract

The present invention provides a liquid crystal display panel with a heater, in which the heater is placed at one side of the liquid crystal display panel, and the heater has a conductive thin film and a heating circuit. Under low temperature environment, because the response time of liquid crystal molecules becomes slower, the liquid crystal display panel could not operate normally. The present invention will turn on the heater under low temperature, and the heating circuit is heating by flowing current through the conductive thin film to keep the liquid crystal display panel at the operable temperature.

Description

200527041

TECHNICAL FIELD The present invention relates to a liquid crystal display panel, and more particularly, to a liquid crystal display panel having a heater, so that the liquid crystal display panel can maintain normal operation in a low temperature environment. In the prior art, a liquid crystal display panel is a two-layer glass substrate unit formed by aligning and bonding two glass substrates, and a gap is left in the middle to inject liquid crystal. In the general manufacturing process, first, a color filter and a thin-film transistor are respectively processed on two glass substrates, and then the two glass substrates are aligned and combined. During the assembling process, the spacers are sprayed between the upper and lower substrates to strengthen the gap in the double-layer glass substrate so that the thickness of the liquid crystals injected later can be dispersed uniformly; a frame glue is formed around the panel. A pattern for bonding the upper and lower glass substrates after hardening. Next, after the liquid crystal injection port is filled with liquid crystal and sealed, the process of the liquid crystal display panel is completed. Please refer to Fig. 1. Fig. 1 is a sectional view showing a conventional liquid crystal display panel. The liquid crystal display panel includes a first polarizing plate 11a and a second polarizing plate lib. A first substrate 12 and a second substrate 13 are provided between the first polarizing plate 11a and the first polarizing plate lib. A spacer (SpaCer) 14 is provided between the first substrate 12 and the second substrate 13 to form a gap, and the liquid crystal 15 is injected into the gap. Liquid crystal is a substance between solid and liquid. When the liquid crystal display panel is below a certain temperature, for example, it is -20 ° C. c. When used in an environment, the liquid crystal may change to a solid state and cannot be twisted in response to changes in the electric field, causing the liquid crystal display panel to malfunction. This makes the liquid crystal

200527041 --- ~-5. Description of the invention (2) __________ The problem that the display panel cannot be used can be solved by special liquid crystal, but the special liquid is driven at a low temperature. There are still restrictions every day and the cost is relatively increased. SUMMARY OF THE INVENTION The object of the present invention is to provide a liquid crystal display panel with a heater for heating the liquid crystal to maintain the liquid crystal in a operable state. According to the above-mentioned object, the present invention provides a liquid crystal display panel. A soil plate; a liquid crystal layer; and a heater provided on the substrate side. The liquid crystal layer can be selectively heated. It is another object of the present invention to provide a suitable heater. According to the above purpose, the present invention provides a heater, which is applicable to the J display panel. The liquid crystal display panel has a substrate, and the heater is at least a conductive film formed on one side of the substrate; 〖-Heating circuit, /, conductive film is electrically connected to provide a current flowing through the conductive film for heating. Another object of the present invention is to provide a method for manufacturing a heater suitable for a liquid crystal display panel. According to the above object, the present invention provides a method for manufacturing a heater, which is suitable for a liquid crystal display panel, including the following steps: providing a substrate; forming a conductive film on the substrate; providing a heating circuit on the conductive film, and the heating circuit includes At least two heating units are arranged on both sides of the conductive film, and

200527041 V. Description of the invention (3) ---- A current is passed through the conductive film for heating; a sensor is arranged on the liquid crystal display panel, the sensor is coupled to the heating circuit, and the sensor is used to detect the liquid crystal Display panel temperature; and a heating switch is provided on the liquid crystal display panel, and the heating switch is coupled to the sensor to enable or disable the heating circuit according to the temperature detected by the sensor. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, hereinafter, a preferred embodiment is described in detail with the accompanying drawings, as follows: ° Embodiment: The following is shown in FIG. 2 And Fig. 3 is used to explain the present invention, Fig. 2 is a sectional view showing the heater of the present invention, and Fig. 3 is a plan view of the heater of the present invention. The heater 26 has a substrate 260, which is made of a material with high penetration and high temperature resistance, such as glass, polyethylene terephthalate (PET) or polycarbonate (PC). In order to prevent the substrate 260 from reducing the brightness of the liquid crystal display panel due to insufficient penetration, or to deform and damage the heater 26 due to poor heat resistance. Next, the substrate 260 is coated or sputtered with a conductive material with high transparency and low resistance to form a uniform and comprehensive conductive film 261 on the substrate 260, which is conductive. The thin film 261 is, for example, indium tin oxide (IT0) or silver (Ag). If the resistance value of the material used to form the conductive thin film 261 is too high, it will cause the conductive thin film 261 to be disconnected and generate excessive thermal energy to damage the heater 26 or the liquid crystal display panel; in addition, if

0773-A30150TW (Nl); P92041; claire.ptd Page 6 200527041 V. Description of the invention (4) When the transparency of the conductive film is not high, it may also cause the The brightness decreases. A heating circuit is provided at both ends of the conductive film 261. The heating circuit includes: heating units 262a and 262b, and the heating units 262a and 262b are located at both ends of the conductive film 261, respectively, for heating the conductive film 26}, among which the heating units 262a and 262b They are coupled by a wire and have a potential difference. After the heating units 262a and 262b are activated, the resistance of the conductive film 261 itself will generate thermal energy due to the passage of current. At the same time, because the resistance of the heating units 26 and 26 ^ is almost zero 'and the conductive film 2 6 1 is uniform and comprehensive Due to the fact that it is formed on the substrate 260, the thermal energy of each point on the conductive thin film 261 will approach ^-. Please refer to FIG. 4 below, which is a sectional view of a liquid crystal display panel with a heater according to the present invention. The liquid crystal display panel includes a first polarizing plate 2ia and a second polarizing plate 21b. A first substrate 22 and a second substrate 23 are provided between the first polarizing plate 21a and the second polarizing plate 2lb. A "spaCer" 24 is provided between the first substrate 22 and the second substrate 23 to form a gap, and the liquid crystal 25 is injected into the gap. A heater 26 is provided between the first substrate 22 and the first polarizing plate 21a. The heater 26 will be turned on or off at a predetermined temperature to maintain the liquid crystal in an operable state. The heater 26 may be provided between the second substrate 23 and the second polarizing plate 21b. In the following, the control method of the heater provided by the present invention will be described. Please cooperate with FIG. 5, which is a detailed block diagram of the present invention. First, a conductive film provided with heating units 262a and 262b is provided.

0773-A30150TW (Nl); P92041; claire.ptd page 7 200527041 V. Description of the invention (5) 261 ′ The heating units 262a and 262b are located at both ends of the conductive film 261, respectively, for heating the conductive film 261. The heating circuit is coupled to a temperature sensor 2 6 3 'The temperature sensor 2 6 3 has a heating switch 2 6 4 and the heating switch 2 6 4 is used to turn on or off according to the temperature sensed by the temperature sensor 263 Heating circuit. Temperature sensing 2 6 3 can sense the temperature of the liquid crystal display panel itself and the temperature of the environment. 'When the temperature detected by the temperature sensor 2 6 3 is too low, for example, a temperature below -20 ° C' The detector 2 6 3 sends a signal to the heating switch 264 'to activate the heating circuit. After the heating units 262a and 262b of the heating circuit are activated, the resistance of the conductive film 261 itself will generate heat energy to heat the liquid crystal display panel due to the passage of current. Under a fixed current, the higher the resistance value of the resistance, the more the heating rate fast. Among them, controlling the heating rate of the LCD panel can be expressed by the following equation:

P = RI2 V / R = IP: heating power R: resistance value of the conductive film I: current flow V: driving voltage When the heating units 262a and 262b are activated to heat the conductive film 261, when the temperature sensor 263 senses When the measured temperature reaches a certain value, for example, a temperature above 25 degrees Celsius', the temperature sensor 2 63 will send a signal to the heating switch 264, and the heating switch 264 turns off the heating unit 262 & and. Child 262b. After the heating units 262a and 262b are turned off, no current flows through the conductive film 261, and the operation of heating the liquid crystal display panel is stopped.

0773-A30150TWF (Nl); P92041; clai re.ptd page 8 200527041 V. Description of the invention (6) The heater provided according to the present invention < avoid the liquid crystal display panel from causing the phase of the liquid crystal in a low temperature environment of f degree The problem that the liquid crystal cannot be twisted due to the change of the electric field due to the transition can be heated by heating to effectively maintain the liquid crystal within the operable temperature range. Although the present invention has been limited to the present invention by anyone, anyone familiar with this technique ^ ^ As above, then it is not used to surround the f, it can be modified and moistened, because = from the spirit of the present invention attached The scope of protection of the invention is defined by the scope of the patent application. 0737-A30150TWF (Nl); P92041; clai re.ptd $ 9 page 200527041 Simple illustration of the diagram. The first picture shows the conventional second picture. The third picture shows the third invention The figure is the plus of the present invention. The fourth figure is the liquid of the present invention. The fifth figure is the symbol of the present invention: 11a ~ first polarizing plate; 12 ~ first substrate; 1 ~ 4 ~ spacer; 21a ~ first polarizing light. Board; 22 ~ first substrate; 2 4 ~ spacer; 2 6 ~ heater; 2 6 1 ~ conductive film; 2 6 3 ~ temperature sensor; cutaway view of liquid crystal display panel. Sectional view of the heater. Top view of the heater. Sectional view of the crystal display panel. Top view of the embodiment of the heater. 1 lb ~ second polarizing plate; 1 ~ 3 ~ second substrate; 1 ~ 5 liquid crystal, 21b ~ second polarizing plate; 23 ~ second substrate; 25 ~ liquid crystal; 260 ~ substrate; 262a, 26 2b ~ heating circuit; 264 ~ Heating switch.

◦ 773-A30150TW (Nl); P92041; claire.ptd page 10

Claims (1)

200527041 6. Scope of patent application 1. A liquid crystal display panel includes at least: a substrate, a liquid crystal layer; and a heater disposed on one side of the substrate to selectively heat the liquid crystal layer. 2. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the heater includes: a conductive film formed on one side of the substrate; and a heating circuit electrically connected to the conductive film, wherein the The heating circuit includes at least two heating units disposed at both ends of the conductive film, and a potential difference exists between the two heating units to provide a current to flow through the conductive film. 3. The liquid crystal display panel according to item 2 of the scope of patent application, wherein the heater further comprises a sensor coupled to the heating circuit. 4. The liquid crystal display panel according to item 3 of the scope of patent application, wherein the sensor further comprises a heating switch for activating or disabling the heating circuit according to the temperature sensed by the sensor. 5. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the substrate is made of polyethylene terephthalate (PET) or polycarbonate (pc) or other high molecular polymers. 6. The liquid crystal display panel according to item 2 of the scope of patent application, wherein the conductive film is indium tin oxide (ITO) or silver (Ag). 7 · A heater suitable for a liquid crystal display panel having a substrate, wherein the heater includes at least: a conductive film, 〇773-A30150TW (Nl); P92041; claire.ptd Page 11 200527041 Six, the scope of the patent application is formed on the-side of the substrate; & η Health connection, used to provide-electric-heating circuit, and the conductive thin plate The electricity is passed through the conductive film for heating. Device, wherein the electric heating element II; the seventh item of the range of the Γ special electrode, the two ends of the conductive film, the circuit includes at least two heating units, set f square, and the two: a potential between the force = element 元. &Quot; More includes, 9 · The force sense as described in item 7 of the scope of patent application: V application is Λ connected to the heating circuit: the heater, # 中 此 测 I 〇 · As the scope of patent application No. 9 The knives σ & *, 3, 17 and 17 further include a heating switch to enable or disable the heating circuit according to the temperature sensed by the sensor. II. The heater according to item 7 of the scope of patent application, wherein the conductive film is indium tin oxide (ITO) or silver (Ag). Plate 1 2-A method for manufacturing a heater suitable for a liquid crystal display surface includes the following steps: providing a substrate; forming a conductive film on the substrate; and providing a heating circuit on the conductive film, the heating circuit includes To the unit is arranged on both sides of the conductive film, so as to make-current flow i the conductive film for heating; power: ϊ a crystal display panel is provided with a sensor 'the sensor is coupled to the plus circuit , The sensor is used to detect the temperature of the liquid crystal display panel; and _ a heating switch is provided on the liquid crystal display panel, and the heating switch is lightly connected to the μ iron sensor for detecting the temperature detected by the sensor To activate or deactivate 200527041 6. Scope of patent application Close the heating circuit. 1 3 · The method for manufacturing a heater as described in item 2 of the patent application scope, wherein the substrate is polymerized by polyethylene terephthalate (PET) or polycarbonate (PC) or other polymers Made of things. 1 4 · The method for manufacturing a heater as described in item 2 of the scope of patent application ', wherein the conductive film is indium tin oxide (ITO) or silver (Ag). 1 5 · The method for manufacturing a heater as described in item 2 of the patent application scope, wherein a potential difference exists between the two heating units on both sides to provide the electric current to flow through the conductive film. 0773-A30150TWF (Nl); P92041; claire.ptd page 13