Semiconductor apparatus with OSD function

Patent metadata

Field	Value
Publication number	US-11715442-B2
Application number	US-202117376564-A
Country	US
Kind code	B2
Filing date	Jul 15, 2021
Priority date	Jan 21, 2019
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

A video input interface receives video data. An OSD circuit draws an intermediate layer in a target region in which an OSD character is to be overlaid on the video data, and overlays the OSD character on the intermediate layer.

First claim

What is claimed is:

1. A semiconductor apparatus comprising:
a video input interface structured to receive video data;
an on-screen display (OSD) circuit structured to draw an intermediate layer in a target region in which an OSD character is to be overlaid on the video data, and to overlay the OSD character on the intermediate layer, wherein the OSD circuit draws the intermediate layer using alpha blending,
wherein the OSD circuit comprises an alpha-value generating unit structured to generate a distribution of alpha values to be applied to the target region, and
wherein the target region comprises: a non-blur region positioned at a central position of the target region and in which the alpha value is designed to be constant; and a blur region arranged such that it surrounds the non-blur region, and the alpha value becomes smaller closer to an outer circumferential portion thereof.

2. The semiconductor apparatus according to claim 1 , wherein the alpha-value generating unit is structured to generate the alpha-value distribution of a reference region positioned at a first corner of the blur region,
and wherein the alpha-value generating unit is structured to generate the alpha-value distribution for each of the remaining three corners of the blur region based on the alpha-value distribution of the reference region.

3. The semiconductor apparatus according to claim 1 , wherein the alpha-value distribution of the blur region is configured as a Gaussian distribution.

4. The semiconductor apparatus according to claim 1 , wherein the OSD character is supplied from an external component in a setup operation of the semiconductor apparatus.

5. The semiconductor apparatus according to claim 4 , wherein a color of the intermediate layer is supplied to the semiconductor apparatus as appended data of a corresponding OSD character.

6. The semiconductor apparatus according to claim 5 , wherein the color of the intermediate layer is embedded in a predetermined pixel positioned in a margin portion of bitmap data of the OSD character.

7. The semiconductor apparatus according to claim 1 , wherein the OSD circuit selects the color of the intermediate layer according to the OSD character to be overlaid on the intermediate layer.

8. The semiconductor apparatus according to claim 1 , structured as a timing controller.

9. The semiconductor apparatus according to claim 1 , structured as a one-chip driver structured to have a function of a timing controller and a function of a source driver.

10. The semiconductor apparatus according to claim 1 , structured as a bridge circuit having M inputs and N outputs (M≤1, N≤1).

11. An in-vehicle display system comprising the semiconductor apparatus according to claim 1 .

12. An electronic device comprising the semiconductor apparatus according to claim 1 .

13. A semiconductor apparatus comprising:
a video input interface structured to receive video data;
an on-screen display (OSD) circuit structured to draw an intermediate layer in a target region in which an OSD character is to be overlaid on the video data, and to overlay the OSD character on the intermediate layer, wherein the OSD circuit draws the intermediate layer using alpha blending,
wherein the OSD circuit comprises an alpha-value generating unit structured to generate a distribution of alpha values to be applied to the target region, and
wherein the alpha-value generating unit is structured to generate at least a part of the alpha-value distribution of the target region by multiplying column data and row data, and by dividing a product thereof by a predetermined value.

14. The semiconductor apparatus according to claim 13 , wherein the predetermined value is 2 k (k≥2),
and wherein the division is configured as a k-bit shift.

Assignees

• Rohm Co Ltd

Inventors

• Endo Hiroharu

Classifications

• B60K35/22

  Display screens · CPC title

• B60K35/29

  Instruments characterised by the way in which information is handled, e.g. showing information on plural displays or prioritising information according to driving conditions · CPC title

• B60K35/10

  Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor · CPC title

• G09G5/026 Primary

  Control of mixing and/or overlay of colours in general (G09G5/022 and G09G5/024 take precedence) · CPC title

• B60K35/00

  Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles · CPC title