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CN-118053396-B - Display device

CN118053396BCN 118053396 BCN118053396 BCN 118053396BCN-118053396-B

Abstract

A display device includes a display panel having a display region overlapping a plurality of pixels arranged in a matrix in a plan view and having a first side surface and a second side surface facing the first side surface, a light source device arranged on the first side surface and emitting light incident from the first side surface toward the display panel, and a driving circuit for calculating an output gradation value based on an input gradation value included in an image signal and outputting a pixel driving signal corresponding to the output gradation value to a corresponding one of the plurality of pixels, the plurality of pixels including a first pixel and a second pixel arranged in a first direction from the first side surface toward the second side surface, the second pixel being located between the first pixel and the second side surface, and the driving circuit making the output gradation value corresponding to the second pixel larger than the output gradation value corresponding to the first pixel when the input gradation value corresponding to the first pixel and the input gradation value corresponding to the second pixel are equal.

Inventors

  • KOBASHI JUNJI

Assignees

  • 株式会社日本显示器

Dates

Publication Date
20260508
Application Date
20231115
Priority Date
20221117

Claims (14)

  1. 1.A display device is characterized by comprising: A display panel having a display area overlapping a plurality of pixels arranged in a matrix in a plan view, and having a first side surface and a second side surface facing the first side surface; a light source device disposed on the first side surface and emitting light incident from the first side surface to the second side surface, and A driving circuit that calculates an output gradation value based on an input gradation value possessed by an image signal, and outputs a pixel driving signal corresponding to the output gradation value to a corresponding one of the plurality of pixels, The plurality of pixels includes first and second pixels arranged in a first direction from the first side toward the second side, The second pixel is located between the first pixel and the second side, When the input gray-scale value corresponding to the first pixel and the input gray-scale value corresponding to the second pixel are equal, the driving circuit makes the output gray-scale value corresponding to the second pixel larger than the output gray-scale value corresponding to the first pixel, The input gray value and the output gray value are determined for each pixel color, In one frame, the image can be visually confirmed by sequentially emitting the light of the corresponding color having the gradation corresponding to the output gradation value from the pixel selected as the pixel emitting the light of the corresponding color.
  2. 2. The display device of claim 1, wherein the display device comprises a display device, Light emitted from the light source device propagates within the display panel from the first side toward the second side, The display panel has a liquid crystal layer including a polymer dispersed liquid crystal.
  3. 3. The display device of claim 2, wherein the display device comprises a display device, Light emitted from the light source device propagates in the display panel in the first direction and in a second direction inclined with respect to the first direction in a plan view, The driving circuit calculates the output gray-scale value using the input gray-scale value of the one pixel, the light quantity of the light incident to the one pixel in the first direction, and the light quantity of the light incident to the one pixel in the second direction.
  4. 4. A display device according to claim 3, wherein, The light incident to the first pixel is scattered in the first pixel, The driving circuit calculates a light quantity of the light incident to the second pixel based on a degree of scattering of the light incident to the first pixel.
  5. 5. The display device of claim 4, wherein the display device comprises a display panel, The first pixel is provided with a switching element, The light incident to the first pixel is scattered by striking the switching element.
  6. 6. A display device according to claim 3, wherein, The driving circuit calculates the light quantity of the light incident to the second pixel based on the degree of scattering of the light incident to the first pixel, which changes in the first pixel according to the magnitude of the output gradation value.
  7. 7. A display device according to claim 3, wherein, The plurality of pixels are arranged in a matrix along the first direction and a third direction orthogonal to the first direction in a plan view, The plurality of pixels includes a third pixel adjacent to the second pixel along the third direction, The light incident on the first pixel is emitted from the first pixel, and is incident on the second pixel and the third pixel.
  8. 8. The display device of claim 7, wherein the display device comprises a display device, The light quantity of the light emitted from the first pixel is distributed into the light quantity of the light incident to the second pixel and the light quantity of the light incident to the third pixel based on an inclination angle of the second direction with respect to the first direction.
  9. 9. The display device of claim 1, wherein the display device comprises a display device, The driving circuit corrects at least one of a first output gradation value calculated based on the input gradation value corresponding to the first pixel and a second output gradation value calculated based on the input gradation value corresponding to the second pixel when the input gradation value corresponding to the first pixel and the input gradation value corresponding to the second pixel are equal, The driving circuit does not correct any one of the first output gradation value and the second output gradation value when the input gradation value corresponding to the first pixel and the input gradation value corresponding to the second pixel are different.
  10. 10. The display device of claim 1, wherein the display device comprises a display device, The plurality of pixels includes a plurality of fourth pixels arranged along the first direction, When the input gray values corresponding to the respective fourth pixels are equal to each other and the light source device emits light of a first emitted light amount, light of a first incident light amount is incident to a pixel closest to the first side among the fourth pixels, When the input gradation values corresponding to the respective plurality of fourth pixels are equal to each other and the light source device emits light of a second emission light amount larger than the first emission light amount, light of a second incident light amount is incident to a pixel closest to the second side surface among the plurality of fourth pixels, The first amount of incident light is equal to the second amount of incident light.
  11. 11. A display device is characterized by comprising: A display panel having a first side; A plurality of light emitters facing the first side; A first pixel disposed on the display panel; A second pixel disposed on the display panel and located on the opposite side of the first side face with the first pixel interposed therebetween, and A driving circuit for inputting an image signal having a first input gray-scale value corresponding to the first pixel and a second input gray-scale value corresponding to the second pixel, The driving circuit outputs a first pixel driving signal having a first output gray value corresponding to the first input gray value to the first pixel, outputs a second pixel driving signal having a second output gray value corresponding to the second input gray value to the second pixel, When the first input gray value is equal to the second input gray value, the second output gray value is greater than the first output gray value, The first input gray value, the second input gray value, the first output gray value, and the second output gray value are determined for each pixel color, In one frame, light of a corresponding color having a gradation corresponding to the first output gradation value is sequentially emitted from the first pixel selected as a pixel emitting light of the corresponding color, and light of a corresponding color having a gradation corresponding to the second output gradation value is sequentially emitted from the second pixel selected as a pixel emitting light of the corresponding color, whereby an image can be visually confirmed.
  12. 12. The display device of claim 11, wherein the display device comprises a display device, The display panel further has a second side surface opposing the first side surface in a first direction, The first pixels and the second pixels are arranged along the first direction.
  13. 13. The display device of claim 11, wherein the display device comprises a display device, The display panel is provided with: a liquid crystal layer including a polymer dispersed liquid crystal; A first substrate and a second substrate with the liquid crystal layer therebetween, and A third substrate disposed on a side opposite to the first substrate with the second substrate interposed therebetween, The third substrate has the first side, Light emitted from the plurality of light emitters enters the third substrate from the first side surface and exits from the main surface of the third substrate.
  14. 14. A display device is characterized by comprising: A display panel including a liquid crystal layer including a polymer dispersed liquid crystal, a first substrate and a second substrate with the liquid crystal layer interposed therebetween, and a third substrate, the second substrate being located between the first substrate and the third substrate; a plurality of light emitters facing the side surface of the third substrate; A first pixel disposed on the display panel; A second pixel disposed on the display panel and arranged at a position arranged with the first pixel in a direction crossing the side surface, and A driving circuit for inputting an image signal having a first input gray-scale value corresponding to the first pixel and a second input gray-scale value corresponding to the second pixel, Light emitted from the plurality of light emitters enters the third substrate from the side surface and exits from the main surface of the third substrate, The driving circuit outputs a first pixel driving signal having a first output gray value corresponding to the first input gray value to the first pixel, outputs a second pixel driving signal having a second output gray value corresponding to the second input gray value to the second pixel, When the first input gray value is equal to the second input gray value, the second output gray value is greater than the first output gray value, The first input gray value, the second input gray value, the first output gray value, and the second output gray value are determined for each pixel color, In one frame, light of a corresponding color having a gradation corresponding to the first output gradation value is sequentially emitted from the first pixel selected as a pixel emitting light of the corresponding color, and light of a corresponding color having a gradation corresponding to the second output gradation value is sequentially emitted from the second pixel selected as a pixel emitting light of the corresponding color, whereby an image can be visually confirmed.

Description

Display device Technical Field The present application relates to a display device. Background Patent document 1 discloses a display device configured to be able to visually confirm a background on one surface side of a display panel from the other surface side. The display device of patent document 1 is a so-called see-through display, and includes a display panel having a liquid crystal layer including a polymer dispersed liquid crystal, and a light source arranged to face a side surface of the display panel. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2020-160254 Disclosure of Invention Technical problem to be solved by the invention In the display device of patent document 1, light from a light source (light source device) enters from a first side surface of a display panel, and propagates inside the display panel toward a second side surface opposite to the first side surface. The display panel is provided with elements such as a switching element and an electrode, and a part of light of the light source device propagating in the display panel is consumed by the elements. Thus, as the light of the light source device propagates within the display panel, the light quantity of the light source device decreases. Thus, in the display panel, the light amount of the light source device on the second side surface side is smaller than the light amount of the light source device on the first side surface side. In this case, therefore, when the plurality of gradation values corresponding to the plurality of pixels are equal to each other, the luminance of the pixel on the second side surface side becomes lower than the luminance of the pixel on the first side surface side. Thus, a desired brightness of the pixel may not be obtained at the second side of the display panel. The purpose of the present application is to realize the uniformity of the brightness of pixels when a plurality of gradation values corresponding to a plurality of pixels are equal to each other in a display device having a display panel in which light from a light source device enters from the side. Solution for solving the technical problems The display device includes a display panel having a display region overlapping a plurality of pixels arranged in a matrix in a plan view and having a first side surface and a second side surface facing the first side surface, a light source device disposed on the first side surface and emitting light incident from the first side surface to the second side surface, and a driving circuit that calculates an output gradation value (output gradation level) based on an input gradation value (input gradation level) included in an image signal and outputs a pixel driving signal corresponding to the output gradation value to a corresponding one of the plurality of pixels, the plurality of pixels including a first pixel and a second pixel arranged in a first direction from the first side surface toward the second side surface, the second pixel being located between the first pixel and the second side surface, and the driving circuit causing the output gradation value corresponding to the second pixel to be larger than the output gradation value when the input gradation value corresponding to the first pixel and the input gradation value corresponding to the second pixel are equal. The display device includes a display panel having a first side surface, a plurality of light emitters facing the first side surface, a first pixel disposed on the display panel, a second pixel disposed on the display panel on a side opposite to the first side surface with the first pixel interposed therebetween, and a driving circuit for inputting an image signal having a first input gradation value corresponding to the first pixel and a second input gradation value corresponding to the second pixel, the driving circuit outputting a first pixel driving signal having a first output gradation value corresponding to the first input gradation value to the first pixel, outputting a second pixel driving signal having a second output gradation value corresponding to the second input gradation value to the second pixel, and the second output gradation value being larger than the first output gradation value when the first input gradation value and the second input gradation value are equal. The display device includes a display panel having a liquid crystal layer including a polymer dispersed liquid crystal, a first substrate and a second substrate which are disposed between the first substrate and the third substrate with the liquid crystal layer interposed therebetween, a plurality of light emitters which face a side surface of the third substrate, a first pixel disposed on the display panel, a second pixel disposed on the display panel at a position aligned with the first pixel in a direction intersecting the side surface, and a driving circuit for inputting an image signal having a first input gra