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EP-4040229-B1 - LIQUID CRYSTAL DISPLAY PANEL AND LIQUID CRYSTAL DISPLAY DEVICE

EP4040229B1EP 4040229 B1EP4040229 B1EP 4040229B1EP-4040229-B1

Inventors

  • LIN, KE
  • YU, YANG
  • MA, JITAO
  • QIU, Zhuwei

Dates

Publication Date
20260506
Application Date
20210315

Claims (9)

  1. A liquid crystal display panel, comprising: a first substrate (310); a second substrate (320); a liquid crystal layer (330), disposed between the first substrate (310) and the second substrate (320); a reflective layer (311), disposed on a side of the first substrate (310) facing the liquid crystal layer (330); and a color filter layer (312), disposed on the first substrate (310) and covering the reflective layer (311), wherein the color filter layer (312) comprises light reflective material doped therein; when light passes through the second substrate (320) reaching the color filter layer (312), the light reflective material is configured to directly reflect one part of the light back to the second substrate (320), and the reflective layer (311) is configured to reflect the other part of the light, which is filtered by the color filter layer (312), to the second substrate (320), the color filter layer (312) comprises a red light color resist (R), a green light color resist (G), and a blue light color resist (B), and characterized in that , the reflective layer (311) comprises a plurality of reflective units spaced apart from each other, each of the reflective units is one-to-one correspondence to the red light color resist (R), the green light color resist (G), and the blue light color resist (B).
  2. The liquid crystal display panel according to claim 1, wherein material of the red light color resist (R), the green light color resist (G), and the blue light color resist (B) comprises the light reflective material.
  3. The liquid crystal display panel according to claim 2, wherein the light reflective material comprises metal.
  4. The liquid crystal display panel according to claim 1, wherein a first electrode layer (313) is disposed between the first substrate (310) and the reflective layer (311), a second electrode layer (323) is disposed on a side of the second substrate (320) facing the liquid crystal layer (330), and an electric field is generated by the first electrode layer (313) and the second electrode layer (323) causing liquid crystal molecules (331) in the liquid crystal layer (330) to rotate.
  5. The liquid crystal display panel according to claim 4, wherein when the liquid crystal molecules (331) are vertically orientated under the electric field, the light reaching the second substrate (320) pass through the liquid crystal layer (330) reaching the color filter layer (312), and is reflected by the reflective layer (311) reaching the second substrate (320).
  6. The liquid crystal display panel according to any one of claims 1 to 5, wherein the first electrode layer (313) comprises a plurality of first electrodes spaced apart from each other, the second electrode layer (323) comprises a plurality of second electrodes spaced apart from each other, and material of the first electrodes and the second electrodes comprises indium tin oxide.
  7. The liquid crystal display panel according to any one of claims 1 to 5, wherein each of the first substrate (310) and the second substrate (320) is a transparent glass substrate.
  8. The liquid crystal display panel according to any one of claims 1 to 5, wherein a polarizing plate (324) is disposed on a side of the second substrate (320) away from the liquid crystal layer (330).
  9. A liquid crystal display device, comprising: a shell; a liquid crystal display panel according to any one of claims 1-8, connected to the shell; and a control module, received in the shell and configured to apply voltages to form an electric field for the liquid crystal display panel.

Description

TECHNICAL FIELD The present disclosure relates to the field of panels, and in particular to a liquid crystal display panel and a liquid crystal display device. BACKGROUND Mobile phones and tablet computers are electronic devices that are commonly used in daily lives, and the electronic devices are usually configured with LCD screens. Most of the LCD screens in the art include array substrates, liquid crystal layers and color filter substrates. An array substrate may include a backlight module and a light source. A color filter substrate may include a color filter. Light emitted from the light source may pass through the backlight module reaching the liquid crystal layer, and may further be redirected by liquid crystal molecules in the liquid crystal layer to reach the color filter. Subsequently, the light may pass through the color filter to present various ratios of red, green and blue colors to display various colors of an image. Due to the requirement of eye protection, blue light carried by the light source is harmful to human eyes. To solve the problem, display manufacturers introduce a liquid crystal display, such as reflective liquid crystal display (RLCD), that does not require a backlight, or emit light without a self-luminous light source. A principle of the RLCD to emit light will be briefly described. The array substrate may be coated with a reflective layer, and the color filter substrate absorbs external ambient light. The ambient light may transmit through the color filter substrate and may further be redirected by the liquid crystal layer. Subsequently, the light may reach and may be reflected by the reflection layer of the array substrate. The light may then pass through the color filter layer for a second time, and then reach the human eyes to present an image. In this way, a loss rate of the light may be increased, thus reducing utilization of the light. In a first reference document D1 (US20200209678A1), a reflective pixel unit, a reflective display panel and a display apparatus are disclosed. The reflective pixel unit includes a substrate, a reflective plate on the substrate, and a reflective filter layer on a side of the reflective plate facing away from the substrate. The reflective filter layer is configured such that a surface of the reflective filter layer facing away from the reflective plate receives visible light and reflects a part of light having wavelengths within a specific range in the visible light, and allows another part of the light having wavelengths within the specific range to pass through the reflective filter layer to the reflective plate. The reflective plate is configured to reflect the another part of the light having wavelengths within the specific range passed through the reflective filter layer. In a second reference document D2 (US20200026133A1), an array substrate and a method of manufacturing the same, a display panel and a method of manufacturing the same, and a display device are provided. The an array substrate includes a base substrate and a plurality of pixels on the base substrate, at least one of the plurality of pixels includes a reflective layer on the base substrate; a filter layer on a side of the reflective layer away from the base substrate; and a pixel electrode on a side of the filter layer away from the reflective layer. In a third reference document D3 (US8345343B2), a reflective display device including: a substrate; a reflective layer on the substrate and configured to reflect light incident on the reflective layer; a color filter layer on the reflective layer; and an optical shutter layer on the color filter layer. Each pixel of a plurality of pixels of the reflective display device includes a plurality of sub-pixels and each sub-pixel includes the substrate, the reflective layer, the color filter layer, and the optical shutter layer, and for each pixel, the color filter layer includes a plurality of color filter elements corresponding to colors respectively obtained by the plurality of sub-pixels. At least one of the plurality of color filter elements includes a composite color area including a plurality of white areas configured to let white light pass through them such that the white light is directly reflected by the reflective layer and the plurality of white areas are discontinuously distributed in at least a portion of the composite color area through which light of the obtained colors passes. In a fourth reference document D4 (US20170123248A1), a display device includes a first substrate, a thin film transistor on the first substrate, a passivation layer on the thin film transistor, a reflective layer on the passivation layer, a color filter on the reflective layer, the reflective layer having a substantially same shape as that of the color filter in a plan view, a first insulating layer on the color filter, a pixel electrode on the first insulating layer, a second substrate opposing the first substrate, and a liquid crystal lay